* EasyPG: Version 0.0.2 released.

[elisp/epg.git] / epg.el

diff --git a/epg.el b/epg.el
index de72571..d73645a 100644 (file)
--- a/epg.el
+++ b/epg.el
@@ -1,4 +1,4 @@
-;;; epg.el --- EasyPG, yet another GnuPG interface.
+;;; epg.el --- the EasyPG Library

 ;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
 ;;   2005, 2006 Free Software Foundation, Inc.
 ;; Copyright (C) 2006 Daiki Ueno
 ;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
 ;;   2005, 2006 Free Software Foundation, Inc.
 ;; Copyright (C) 2006 Daiki Ueno

@@ -26,13 +26,21 @@
 ;;; Code:
 
 (defgroup epg ()
 ;;; Code:
 
 (defgroup epg ()

-  "EasyPG, yet another GnuPG interface.")
+  "The EasyPG Library"
+  :group 'emacs)

 
 (defcustom epg-gpg-program "gpg"
   "The `gpg' executable."
   :group 'epg
   :type 'string)
 
 
 (defcustom epg-gpg-program "gpg"
   "The `gpg' executable."
   :group 'epg
   :type 'string)
 

+(defcustom epg-gpgsm-program "gpgsm"
+  "The `gpgsm' executable."
+  :group 'epg
+  :type 'string)
+
+(defconst epg-version-number "0.0.2")
+

 (defvar epg-user-id nil
   "GnuPG ID of your default identity.")
 
 (defvar epg-user-id nil
   "GnuPG ID of your default identity.")
 

@@ -44,202 +52,759 @@
 (defvar epg-key-id nil)
 (defvar epg-context nil)
 (defvar epg-debug nil)
 (defvar epg-key-id nil)
 (defvar epg-context nil)
 (defvar epg-debug nil)

-
-(defvar epg-colons-pub-spec
-  '((trust "[^:]")
-    (length "[0-9]+" 0 string-to-number)
-    (algorithm "[0-9]+" 0 string-to-number)
-    (key-id "[^:]+")
-    (creation-date "[0-9]+")
-    (expiration-date "[0-9]+")
-    nil
-    (ownertrust "[^:]")
-    nil
-    nil
-    (capability "[escaESCA]*"))
-  "The schema of keylisting output whose type is \"pub\".
-This is used by `epg-list-keys'.")
-
-(defvar epg-colons-sec-spec
-  '((trust "[^:]")
-    (length "[0-9]+" 0 string-to-number)
-    (algorithm "[0-9]+" 0 string-to-number)
-    (key-id "[^:]+")
-    (creation-date "[0-9]+")
-    (expiration-date "[0-9]+")
-    nil
-    (ownertrust "[^:]"))
-"The schema of keylisting output whose type is \"sec\".
-This is used by `epg-list-keys'.")
-
-(defvar epg-colons-uid-spec
-  '((trust "[^:]")
-    nil
-    nil
-    nil
-    (creation-date "[0-9]+")
-    (expiration-date "[0-9]+")
-    (hash "[^:]+")
-    nil
-    (user-id "[^:]+"))
-  "The schema of keylisting output whose type is \"uid\".
-This is used by `epg-list-keys'.")
+(defvar epg-debug-buffer nil)
+
+;; from gnupg/include/cipher.h
+(defconst epg-cipher-algorithm-alist
+  '((0 . "NONE")
+    (1 . "IDEA")
+    (2 . "3DES")
+    (3 . "CAST5")
+    (4 . "BLOWFISH")
+    (7 . "AES")
+    (8 . "AES192")
+    (9 . "AES256")
+    (10 . "TWOFISH")
+    (110 . "DUMMY")))
+
+;; from gnupg/include/cipher.h
+(defconst epg-pubkey-algorithm-alist
+  '((1 . "RSA")
+    (2 . "RSA_E")
+    (3 . "RSA_S")
+    (16 . "ELGAMAL_E")
+    (17 . "DSA")
+    (20 . "ELGAMAL")))
+
+;; from gnupg/include/cipher.h
+(defconst epg-digest-algorithm-alist
+  '((1 . "MD5")
+    (2 . "SHA1")
+    (3 . "RMD160")
+    (8 . "SHA256")
+    (9 . "SHA384")
+    (10 . "SHA512")))
+
+;; from gnupg/include/cipher.h
+(defconst epg-compress-algorithm-alist
+  '((0 . "NONE")
+    (1 . "ZIP")
+    (2 . "ZLIB")
+    (3 . "BZIP2")))
+
+(defconst epg-invalid-recipients-reason-alist
+  '((0 . "No specific reason given")
+    (1 . "Not Found")
+    (2 . "Ambigious specification")
+    (3 . "Wrong key usage")
+    (4 . "Key revoked")
+    (5 . "Key expired")
+    (6 . "No CRL known")
+    (7 . "CRL too old")
+    (8 . "Policy mismatch")
+    (9 . "Not a secret key")
+    (10 . "Key not trusted")))
+
+(defconst epg-delete-problem-reason-alist
+  '((1 . "No such key")
+    (2 . "Must delete secret key first")
+    (3 . "Ambigious specification")))
+
+(defconst epg-import-ok-reason-alist
+  '((0 . "Not actually changed")
+    (1 . "Entirely new key")
+    (2 . "New user IDs")
+    (4 . "New signatures")
+    (8 . "New subkeys")
+    (16 . "Contains private key")))
+
+(defconst epg-import-problem-reason-alist
+  '((0 . "No specific reason given")
+    (1 . "Invalid Certificate")
+    (2 . "Issuer Certificate missing")
+    (3 . "Certificate Chain too long")
+    (4 . "Error storing certificate")))
+
+(defconst epg-no-data-reason-alist
+  '((1 . "No armored data")
+    (2 . "Expected a packet but did not found one")
+    (3 . "Invalid packet found, this may indicate a non OpenPGP message")
+    (4 . "Signature expected but not found")))
+
+(defconst epg-unexpected-reason-alist nil)
+
+(defvar epg-key-validity-alist
+  '((?o . unknown)
+    (?i . invalid)
+    (?d . disabled)
+    (?r . revoked)
+    (?e . expired)
+    (?- . none)
+    (?q . undefined)
+    (?n . never)
+    (?m . marginal)
+    (?f . full)
+    (?u . ultimate)))
+
+(defvar epg-key-capablity-alist
+  '((?e . encrypt)
+    (?s . sign)
+    (?c . certify)
+    (?a . authentication)))
+
+(defvar epg-new-signature-type-alist
+  '((?D . detached)
+    (?C . clear)
+    (?S . normal)))
+
+(defvar epg-dn-type-alist
+  '(("1.2.840.113549.1.9.1" . "EMail")
+    ("2.5.4.12" . "T")
+    ("2.5.4.42" . "GN")
+    ("2.5.4.4" . "SN")
+    ("0.2.262.1.10.7.20" . "NameDistinguisher")
+    ("2.5.4.16" . "ADDR")
+    ("2.5.4.15" . "BC")
+    ("2.5.4.13" . "D")
+    ("2.5.4.17" . "PostalCode")
+    ("2.5.4.65" . "Pseudo")
+    ("2.5.4.5" . "SerialNumber")))

 
 (defvar epg-prompt-alist nil)
 
 (defvar epg-prompt-alist nil)

-    
-(defun epg-make-context (&optional protocol armor textmode include-certs)
+
+(defun epg-make-data-from-file (file)
+  "Make a data object from FILE."
+  (cons 'epg-data (vector file nil)))
+
+(defun epg-make-data-from-string (string)
+  "Make a data object from STRING."
+  (cons 'epg-data (vector nil string)))
+
+(defun epg-data-file (data)
+  "Return the file of DATA."
+  (unless (eq (car data) 'epg-data)
+    (signal 'wrong-type-argument (list 'epg-data-p data)))
+  (aref (cdr data) 0))
+
+(defun epg-data-string (data)
+  "Return the string of DATA."
+  (unless (eq (car data) 'epg-data)
+    (signal 'wrong-type-argument (list 'epg-data-p data)))
+  (aref (cdr data) 1))
+
+(defun epg-make-context (&optional protocol armor textmode include-certs
+                                  cipher-algorithm digest-algorithm
+                                  compress-algorithm)

   "Return a context object."
   "Return a context object."

-  (vector protocol armor textmode include-certs
-         (cons #'epg-passphrase-callback-function nil)
-         (cons #'epg-progress-callback-function nil)
-         nil nil nil nil))
+  (cons 'epg-context
+       (vector (or protocol 'OpenPGP) armor textmode include-certs
+               cipher-algorithm digest-algorithm compress-algorithm
+               #'epg-passphrase-callback-function
+               #'epg-progress-callback-function
+               nil nil nil nil nil)))

 
 (defun epg-context-protocol (context)
 
 (defun epg-context-protocol (context)

-  "Return the protocol used within the context."
-  (aref context 0))
+  "Return the protocol used within CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 0))

 
 (defun epg-context-armor (context)
 
 (defun epg-context-armor (context)

-  "Return t if the output shouled be ASCII armored in the CONTEXT context."
-  (aref context 1))
+  "Return t if the output shouled be ASCII armored in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 1))

 
 (defun epg-context-textmode (context)
 
 (defun epg-context-textmode (context)

-  "Return t if canonical text mode should be used in the CONTEXT context."
-  (aref context 2))
+  "Return t if canonical text mode should be used in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 2))

 
 (defun epg-context-include-certs (context)
   "Return how many certificates should be included in an S/MIME signed
 message."
 
 (defun epg-context-include-certs (context)
   "Return how many certificates should be included in an S/MIME signed
 message."

-  (aref context 3))
-
-(defun epg-context-passphrase-callback-info (context)
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 3))
+
+(defun epg-context-cipher-algorithm (context)
+  "Return the cipher algorithm in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 4))
+
+(defun epg-context-digest-algorithm (context)
+  "Return the digest algorithm in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 5))
+
+(defun epg-context-compress-algorithm (context)
+  "Return the compress algorithm in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 6))
+
+(defun epg-context-passphrase-callback (context)

   "Return the function used to query passphrase."
   "Return the function used to query passphrase."

-  (aref context 4))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 7))

 
 

-(defun epg-context-progress-callback-info (context)
+(defun epg-context-progress-callback (context)

   "Return the function which handles progress update."
   "Return the function which handles progress update."

-  (aref context 5))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 8))

 
 (defun epg-context-signers (context)
   "Return the list of key-id for singning."
 
 (defun epg-context-signers (context)
   "Return the list of key-id for singning."

-  (aref context 6))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 9))

 
 (defun epg-context-process (context)
   "Return the process object of `epg-gpg-program'.
 This function is for internal use only."
 
 (defun epg-context-process (context)
   "Return the process object of `epg-gpg-program'.
 This function is for internal use only."

-  (aref context 7))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 10))

 
 (defun epg-context-output-file (context)
   "Return the output file of `epg-gpg-program'.
 This function is for internal use only."
 
 (defun epg-context-output-file (context)
   "Return the output file of `epg-gpg-program'.
 This function is for internal use only."

-  (aref context 8))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 11))

 
 (defun epg-context-result (context)
   "Return the result of the previous cryptographic operation."
 
 (defun epg-context-result (context)
   "Return the result of the previous cryptographic operation."

-  (aref context 9))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 12))
+
+(defun epg-context-operation (context)
+  "Return the name of the current cryptographic operation."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aref (cdr context) 13))

 
 (defun epg-context-set-protocol (context protocol)
 
 (defun epg-context-set-protocol (context protocol)

-  "Set the protocol used within the context."
-  (aset context 0 protocol))
+  "Set the protocol used within CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 0 protocol))

 
 (defun epg-context-set-armor (context armor)
 
 (defun epg-context-set-armor (context armor)

-  "Specify if the output shouled be ASCII armored in the CONTEXT context."
-  (aset context 1 armor))
+  "Specify if the output shouled be ASCII armored in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 1 armor))

 
 (defun epg-context-set-textmode (context textmode)
 
 (defun epg-context-set-textmode (context textmode)

-  "Specify if canonical text mode should be used in the CONTEXT context."
-  (aset context 2 textmode))
+  "Specify if canonical text mode should be used in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 2 textmode))

 
 (defun epg-context-set-include-certs (context include-certs)
  "Set how many certificates should be included in an S/MIME signed message."
 
 (defun epg-context-set-include-certs (context include-certs)
  "Set how many certificates should be included in an S/MIME signed message."

-  (aset context 3 include-certs))
-
-(defun epg-context-set-passphrase-callback-info (context
-                                                passphrase-callback-info)
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 3 include-certs))
+
+(defun epg-context-set-cipher-algorithm (context cipher-algorithm)
+ "Set the cipher algorithm in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 4 cipher-algorithm))
+
+(defun epg-context-set-digest-algorithm (context digest-algorithm)
+ "Set the digest algorithm in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 5 digest-algorithm))
+
+(defun epg-context-set-compress-algorithm (context compress-algorithm)
+ "Set the compress algorithm in CONTEXT."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 6 compress-algorithm))
+
+(defun epg-context-set-passphrase-callback (context
+                                                passphrase-callback)

   "Set the function used to query passphrase."
   "Set the function used to query passphrase."

-  (aset context 4 passphrase-callback-info))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 7 passphrase-callback))

 
 

-(defun epg-context-set-progress-callback-info (context progress-callback-info)
+(defun epg-context-set-progress-callback (context progress-callback)

   "Set the function which handles progress update."
   "Set the function which handles progress update."

-  (aset context 5 progress-callback-info))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 8 progress-callback))

 
 (defun epg-context-set-signers (context signers)
  "Set the list of key-id for singning."
 
 (defun epg-context-set-signers (context signers)
  "Set the list of key-id for singning."

-  (aset context 6 signers))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 9 signers))

 
 (defun epg-context-set-process (context process)
   "Set the process object of `epg-gpg-program'.
 This function is for internal use only."
 
 (defun epg-context-set-process (context process)
   "Set the process object of `epg-gpg-program'.
 This function is for internal use only."

-  (aset context 7 process))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 10 process))

 
 (defun epg-context-set-output-file (context output-file)
   "Set the output file of `epg-gpg-program'.
 This function is for internal use only."
 
 (defun epg-context-set-output-file (context output-file)
   "Set the output file of `epg-gpg-program'.
 This function is for internal use only."

-  (aset context 8 output-file))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 11 output-file))

 
 (defun epg-context-set-result (context result)
   "Set the result of the previous cryptographic operation."
 
 (defun epg-context-set-result (context result)
   "Set the result of the previous cryptographic operation."

-  (aset context 9 result))
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 12 result))

 
 

-(defun epg-make-signature (status key-id user-id)
+(defun epg-context-set-operation (context operation)
+  "Set the name of the current cryptographic operation."
+  (unless (eq (car context) 'epg-context)
+    (signal 'wrong-type-argument (list 'epg-context-p context)))
+  (aset (cdr context) 13 operation))
+
+(defun epg-make-signature (status &optional key-id)

   "Return a signature object."
   "Return a signature object."

-  (vector status key-id user-id nil nil))
+  (cons 'epg-signature (vector status key-id nil nil nil nil nil nil nil nil)))

 
 (defun epg-signature-status (signature)
   "Return the status code of SIGNATURE."
 
 (defun epg-signature-status (signature)
   "Return the status code of SIGNATURE."

-  (aref signature 0))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 0))

 
 (defun epg-signature-key-id (signature)
   "Return the key-id of SIGNATURE."
 
 (defun epg-signature-key-id (signature)
   "Return the key-id of SIGNATURE."

-  (aref signature 1))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 1))

 
 

-(defun epg-signature-user-id (signature)
-  "Return the user-id of SIGNATURE."
-  (aref signature 2))
-  

 (defun epg-signature-validity (signature)
   "Return the validity of SIGNATURE."
 (defun epg-signature-validity (signature)
   "Return the validity of SIGNATURE."

-  (aref signature 3))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 2))

 
 (defun epg-signature-fingerprint (signature)
   "Return the fingerprint of SIGNATURE."
 
 (defun epg-signature-fingerprint (signature)
   "Return the fingerprint of SIGNATURE."

-  (aref signature 4))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 3))
+
+(defun epg-signature-creation-time (signature)
+  "Return the creation time of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 4))
+
+(defun epg-signature-expiration-time (signature)
+  "Return the expiration time of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 5))
+
+(defun epg-signature-pubkey-algorithm (signature)
+  "Return the public key algorithm of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 6))
+
+(defun epg-signature-digest-algorithm (signature)
+  "Return the digest algorithm of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 7))
+
+(defun epg-signature-class (signature)
+  "Return the class of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 8))
+
+(defun epg-signature-version (signature)
+  "Return the version of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aref (cdr signature) 9))

 
 (defun epg-signature-set-status (signature status)
  "Set the status code of SIGNATURE."
 
 (defun epg-signature-set-status (signature status)
  "Set the status code of SIGNATURE."

-  (aset signature 0 status))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 0 status))

 
 (defun epg-signature-set-key-id (signature key-id)
  "Set the key-id of SIGNATURE."
 
 (defun epg-signature-set-key-id (signature key-id)
  "Set the key-id of SIGNATURE."

-  (aset signature 1 key-id))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 1 key-id))

 
 

-(defun epg-signature-set-user-id (signature user-id)
- "Set the user-id of SIGNATURE."
-  (aset signature 2 user-id))
-  

 (defun epg-signature-set-validity (signature validity)
  "Set the validity of SIGNATURE."
 (defun epg-signature-set-validity (signature validity)
  "Set the validity of SIGNATURE."

-  (aset signature 3 validity))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 2 validity))

 
 (defun epg-signature-set-fingerprint (signature fingerprint)
  "Set the fingerprint of SIGNATURE."
 
 (defun epg-signature-set-fingerprint (signature fingerprint)
  "Set the fingerprint of SIGNATURE."

-  (aset signature 4 fingerprint))
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 3 fingerprint))
+
+(defun epg-signature-set-creation-time (signature creation-time)
+  "Set the creation time of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 4 creation-time))
+
+(defun epg-signature-set-expiration-time (signature expiration-time)
+  "Set the expiration time of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 5 expiration-time))
+
+(defun epg-signature-set-pubkey-algorithm (signature pubkey-algorithm)
+  "Set the public key algorithm of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 6 pubkey-algorithm))
+
+(defun epg-signature-set-digest-algorithm (signature digest-algorithm)
+  "Set the digest algorithm of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 7 digest-algorithm))
+
+(defun epg-signature-set-class (signature class)
+  "Set the class of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 8 class))
+
+(defun epg-signature-set-version (signature version)
+  "Set the version of SIGNATURE."
+  (unless (eq (car signature) 'epg-signature)
+    (signal 'wrong-type-argument (list 'epg-signature-p signature)))
+  (aset (cdr signature) 9 version))
+
+(defun epg-make-new-signature (type pubkey-algorithm digest-algorithm
+                                   class creation-time fingerprint)
+  "Return a new signature object."
+  (cons 'epg-new-signature (vector type pubkey-algorithm digest-algorithm
+                                  class creation-time fingerprint)))
+
+(defun epg-new-signature-type (new-signature)
+  "Return the type of NEW-SIGNATURE."
+  (unless (eq (car new-signature) 'epg-new-signature)
+    (signal 'wrong-type-argument (list 'epg-new-signature-p new-signature)))
+  (aref (cdr new-signature) 0))
+
+(defun epg-new-signature-pubkey-algorithm (new-signature)
+  "Return the public key algorithm of NEW-SIGNATURE."
+  (unless (eq (car new-signature) 'epg-new-signature)
+    (signal 'wrong-type-argument (list 'epg-new-signature-p new-signature)))
+  (aref (cdr new-signature) 1))
+
+(defun epg-new-signature-digest-algorithm (new-signature)
+  "Return the digest algorithm of NEW-SIGNATURE."
+  (unless (eq (car new-signature) 'epg-new-signature)
+    (signal 'wrong-type-argument (list 'epg-new-signature-p new-signature)))
+  (aref (cdr new-signature) 2))
+
+(defun epg-new-signature-class (new-signature)
+  "Return the class of NEW-SIGNATURE."
+  (unless (eq (car new-signature) 'epg-new-signature)
+    (signal 'wrong-type-argument (list 'epg-new-signature-p new-signature)))
+  (aref (cdr new-signature) 3))
+
+(defun epg-new-signature-creation-time (new-signature)
+  "Return the creation time of NEW-SIGNATURE."
+  (unless (eq (car new-signature) 'epg-new-signature)
+    (signal 'wrong-type-argument (list 'epg-new-signature-p new-signature)))
+  (aref (cdr new-signature) 4))
+
+(defun epg-new-signature-fingerprint (new-signature)
+  "Return the fingerprint of NEW-SIGNATURE."
+  (unless (eq (car new-signature) 'epg-new-signature)
+    (signal 'wrong-type-argument (list 'epg-new-signature-p new-signature)))
+  (aref (cdr new-signature) 5))
+
+(defun epg-make-key (owner-trust)
+  "Return a key object."
+  (cons 'epg-key (vector owner-trust nil nil)))
+
+(defun epg-key-owner-trust (key)
+  "Return the owner trust of KEY."
+  (unless (eq (car key) 'epg-key)
+    (signal 'wrong-type-argument (list 'epg-key-p key)))
+  (aref (cdr key) 0))
+
+(defun epg-key-sub-key-list (key)
+  "Return the sub key list of KEY."
+  (unless (eq (car key) 'epg-key)
+    (signal 'wrong-type-argument (list 'epg-key-p key)))
+  (aref (cdr key) 1))
+
+(defun epg-key-user-id-list (key)
+  "Return the user ID list of KEY."
+  (unless (eq (car key) 'epg-key)
+    (signal 'wrong-type-argument (list 'epg-key-p key)))
+  (aref (cdr key) 2))
+
+(defun epg-key-set-sub-key-list (key sub-key-list)
+  "Set the sub key list of KEY."
+  (unless (eq (car key) 'epg-key)
+    (signal 'wrong-type-argument (list 'epg-key-p key)))
+  (aset (cdr key) 1 sub-key-list))
+
+(defun epg-key-set-user-id-list (key user-id-list)
+  "Set the user ID list of KEY."
+  (unless (eq (car key) 'epg-key)
+    (signal 'wrong-type-argument (list 'epg-key-p key)))
+  (aset (cdr key) 2 user-id-list))
+
+(defun epg-make-sub-key (validity capability secret-p algorithm length id
+                                 creation-time expiration-time)
+  "Return a sub key object."
+  (cons 'epg-sub-key
+       (vector validity capability secret-p algorithm length id creation-time
+               expiration-time nil)))
+
+(defun epg-sub-key-validity (sub-key)
+  "Return the validity of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 0))
+
+(defun epg-sub-key-capability (sub-key)
+  "Return the capability of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 1))
+
+(defun epg-sub-key-secret-p (sub-key)
+  "Return non-nil if SUB-KEY is a secret key."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 2))
+
+(defun epg-sub-key-algorithm (sub-key)
+  "Return the algorithm of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 3))
+
+(defun epg-sub-key-length (sub-key)
+  "Return the length of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 4))
+
+(defun epg-sub-key-id (sub-key)
+  "Return the ID of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 5))
+
+(defun epg-sub-key-creation-time (sub-key)
+  "Return the creation time of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 6))
+
+(defun epg-sub-key-expiration-time (sub-key)
+  "Return the expiration time of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 7))
+
+(defun epg-sub-key-fingerprint (sub-key)
+  "Return the fingerprint of SUB-KEY."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aref (cdr sub-key) 8))
+
+(defun epg-sub-key-set-fingerprint (sub-key fingerprint)
+  "Set the fingerprint of SUB-KEY.
+This function is for internal use only."
+  (unless (eq (car sub-key) 'epg-sub-key)
+    (signal 'wrong-type-argument (list 'epg-sub-key-p sub-key)))
+  (aset (cdr sub-key) 8 fingerprint))
+
+(defun epg-make-user-id (validity string)
+  "Return a user ID object."
+  (cons 'epg-user-id (vector validity string nil)))
+
+(defun epg-user-id-validity (user-id)
+  "Return the validity of USER-ID."
+  (unless (eq (car user-id) 'epg-user-id)
+    (signal 'wrong-type-argument (list 'epg-user-id-p user-id)))
+  (aref (cdr user-id) 0))
+
+(defun epg-user-id-string (user-id)
+  "Return the name of USER-ID."
+  (unless (eq (car user-id) 'epg-user-id)
+    (signal 'wrong-type-argument (list 'epg-user-id-p user-id)))
+  (aref (cdr user-id) 1))
+
+(defun epg-user-id-signature-list (user-id)
+  "Return the signature list of USER-ID."
+  (unless (eq (car user-id) 'epg-user-id)
+    (signal 'wrong-type-argument (list 'epg-user-id-p user-id)))
+  (aref (cdr user-id) 2))
+
+(defun epg-user-id-set-signature-list (user-id signature-list)
+  "Set the signature list of USER-ID."
+  (unless (eq (car user-id) 'epg-user-id)
+    (signal 'wrong-type-argument (list 'epg-user-id-p user-id)))
+  (aset (cdr user-id) 2 signature-list))
+
+(defun epg-make-key-signature (validity pubkey-algorithm key-id creation-time
+                                       expiration-time user-id class
+                                       exportable-p)
+  "Return a key signature object."
+  (cons 'epg-key-signature
+       (vector validity pubkey-algorithm key-id creation-time expiration-time
+               user-id class exportable-p)))
+
+(defun epg-key-signature-validity (key-signature)
+  "Return the validity of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 0))
+
+(defun epg-key-signature-pubkey-algorithm (key-signature)
+  "Return the public key algorithm of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 1))
+
+(defun epg-key-signature-key-id (key-signature)
+  "Return the key-id of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 2))
+
+(defun epg-key-signature-creation-time (key-signature)
+  "Return the creation time of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 3))
+
+(defun epg-key-signature-expiration-time (key-signature)
+  "Return the expiration time of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 4))
+
+(defun epg-key-signature-user-id (key-signature)
+  "Return the user-id of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 5))
+
+(defun epg-key-signature-class (key-signature)
+  "Return the class of KEY-SIGNATURE."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 6))
+
+(defun epg-key-signature-exportable-p (key-signature)
+  "Return t if KEY-SIGNATURE is exportable."
+  (unless (eq (car key-signature) 'epg-key-signature)
+    (signal 'wrong-type-argument (list 'epg-key-signature-p key-signature)))
+  (aref (cdr key-signature) 7))

 
 (defun epg-context-result-for (context name)
 
 (defun epg-context-result-for (context name)

+  "Return the result of CONTEXT associated with NAME."

   (cdr (assq name (epg-context-result context))))
 
 (defun epg-context-set-result-for (context name value)
   (cdr (assq name (epg-context-result context))))
 
 (defun epg-context-set-result-for (context name value)

+  "Set the result of CONTEXT associated with NAME to VALUE."

   (let* ((result (epg-context-result context))
         (entry (assq name result)))
     (if entry
        (setcdr entry value)
       (epg-context-set-result context (cons (cons name value) result)))))
 
   (let* ((result (epg-context-result context))
         (entry (assq name result)))
     (if entry
        (setcdr entry value)
       (epg-context-set-result context (cons (cons name value) result)))))
 

-(defun epg-start (context args)
+(defun epg-signature-to-string (signature)
+  "Convert SIGNATURE to a human readable string."
+  (let ((user-id (cdr (assoc (epg-signature-key-id signature)
+                            epg-user-id-alist))))
+    (concat
+     (cond ((eq (epg-signature-status signature) 'good)
+           "Good signature from ")
+          ((eq (epg-signature-status signature) 'bad)
+           "Bad signature from ")
+          ((eq (epg-signature-status signature) 'expired)
+           "Expired signature from ")
+          ((eq (epg-signature-status signature) 'expired-key)
+           "Signature made by expired key ")
+          ((eq (epg-signature-status signature) 'revoked-key)
+           "Signature made by revoked key ")
+          ((eq (epg-signature-status signature) 'no-pubkey)
+           "No public key for "))
+     (epg-signature-key-id signature)
+     " "
+     (if user-id
+        (concat (if (stringp user-id)
+                    user-id
+                  (epg-decode-dn user-id))
+                " ")
+       "")
+     (if (epg-signature-validity signature)
+        (format "(trust %s)"  (epg-signature-validity signature))
+       ""))))
+
+(defun epg-verify-result-to-string (verify-result)
+  "Convert VERIFY-RESULT to a human readable string."
+  (mapconcat #'epg-signature-to-string verify-result "\n"))
+
+(defun epg-new-signature-to-string (new-signature)
+  "Convert NEW-SIGNATURE to a human readable string."
+  (concat
+   (cond ((eq (epg-new-signature-type new-signature) 'detached)
+         "Detached signature ")
+        ((eq (epg-new-signature-type new-signature) 'clear)
+         "Clear text signature ")
+        (t
+         "Signature "))
+   (cdr (assq (epg-new-signature-pubkey-algorithm new-signature)
+             epg-pubkey-algorithm-alist))
+   "/"
+   (cdr (assq (epg-new-signature-digest-algorithm new-signature)
+             epg-digest-algorithm-alist))
+   " "
+   (format "%02X " (epg-new-signature-class new-signature))
+   (epg-new-signature-fingerprint new-signature)))
+
+(defun epg--start (context args)

   "Start `epg-gpg-program' in a subprocess with given ARGS."
   "Start `epg-gpg-program' in a subprocess with given ARGS."

+  (if (and (epg-context-process context)
+          (eq (process-status (epg-context-process context)) 'run))
+      (error "%s is already running in this context"
+            (if (eq (epg-context-protocol context) 'CMS)
+                epg-gpgsm-program
+              epg-gpg-program)))

   (let* ((args (append (list "--no-tty"
                             "--status-fd" "1"
   (let* ((args (append (list "--no-tty"
                             "--status-fd" "1"

-                            "--command-fd" "0"
-                            "--yes") ; overwrite
+                            "--yes")
+                      (unless (eq (epg-context-protocol context) 'CMS)
+                        (list "--command-fd" "0"))

                       (if (epg-context-armor context) '("--armor"))
                       (if (epg-context-textmode context) '("--textmode"))
                       (if (epg-context-output-file context)
                       (if (epg-context-armor context) '("--armor"))
                       (if (epg-context-textmode context) '("--textmode"))
                       (if (epg-context-output-file context)

@@ -250,6 +815,17 @@ This function is for internal use only."
         (orig-mode (default-file-modes))
         (buffer (generate-new-buffer " *epg*"))
         process)
         (orig-mode (default-file-modes))
         (buffer (generate-new-buffer " *epg*"))
         process)

+    (if epg-debug
+       (save-excursion
+         (unless epg-debug-buffer
+           (setq epg-debug-buffer (generate-new-buffer " *epg-debug*")))
+         (set-buffer epg-debug-buffer)
+         (goto-char (point-max))
+         (insert (format "%s %s\n"
+                         (if (eq (epg-context-protocol context) 'CMS)
+                             epg-gpgsm-program
+                          epg-gpg-program)
+                         (mapconcat #'identity args " ")))))

     (with-current-buffer buffer
       (make-local-variable 'epg-read-point)
       (setq epg-read-point (point-min))
     (with-current-buffer buffer
       (make-local-variable 'epg-read-point)
       (setq epg-read-point (point-min))

@@ -263,15 +839,21 @@ This function is for internal use only."
        (progn
          (set-default-file-modes 448)
          (setq process
        (progn
          (set-default-file-modes 448)
          (setq process

-               (apply #'start-process "epg" buffer epg-gpg-program args)))
+               (apply #'start-process "epg" buffer
+                      (if (eq (epg-context-protocol context) 'CMS)
+                          epg-gpgsm-program
+                        epg-gpg-program)
+                      args)))

       (set-default-file-modes orig-mode))
       (set-default-file-modes orig-mode))

-    (set-process-filter process #'epg-process-filter)
+    (set-process-filter process #'epg--process-filter)

     (epg-context-set-process context process)))
 
     (epg-context-set-process context process)))
 

-(defun epg-process-filter (process input)
+(defun epg--process-filter (process input)

   (if epg-debug
       (save-excursion
   (if epg-debug
       (save-excursion

-       (set-buffer (get-buffer-create  " *epg-debug*"))
+       (unless epg-debug-buffer
+         (setq epg-debug-buffer (generate-new-buffer " *epg-debug*")))
+       (set-buffer epg-debug-buffer)

        (goto-char (point-max))
        (insert input)))
   (if (buffer-live-p (process-buffer process))
        (goto-char (point-max))
        (insert input)))
   (if (buffer-live-p (process-buffer process))

@@ -281,32 +863,32 @@ This function is for internal use only."
        (insert input)
        (goto-char epg-read-point)
        (beginning-of-line)
        (insert input)
        (goto-char epg-read-point)
        (beginning-of-line)

-       (while (looking-at ".*\n")      ;the input line is finished
+       (while (looking-at ".*\n")      ;the input line finished

          (save-excursion
            (if (looking-at "\\[GNUPG:] \\([A-Z_]+\\) ?\\(.*\\)")
                (let* ((status (match-string 1))
                       (string (match-string 2))
          (save-excursion
            (if (looking-at "\\[GNUPG:] \\([A-Z_]+\\) ?\\(.*\\)")
                (let* ((status (match-string 1))
                       (string (match-string 2))

-                      (symbol (intern-soft (concat "epg-status-" status))))
+                      (symbol (intern-soft (concat "epg--status-" status))))

                  (if (member status epg-pending-status-list)
                      (setq epg-pending-status-list nil))
                  (if (and symbol
                           (fboundp symbol))
                  (if (member status epg-pending-status-list)
                      (setq epg-pending-status-list nil))
                  (if (and symbol
                           (fboundp symbol))

-                     (funcall symbol process string)))))
+                     (funcall symbol epg-context string)))))

          (forward-line))
        (setq epg-read-point (point)))))
 
 (defun epg-read-output (context)
          (forward-line))
        (setq epg-read-point (point)))))
 
 (defun epg-read-output (context)

+  "Read the output file CONTEXT and return the content as a string."

   (with-temp-buffer
     (if (fboundp 'set-buffer-multibyte)
        (set-buffer-multibyte nil))
     (if (file-exists-p (epg-context-output-file context))
   (with-temp-buffer
     (if (fboundp 'set-buffer-multibyte)
        (set-buffer-multibyte nil))
     (if (file-exists-p (epg-context-output-file context))

-       (let ((coding-system-for-read (if (epg-context-textmode context)
-                                         'raw-text
-                                       'binary)))
+       (let ((coding-system-for-read 'binary))

          (insert-file-contents (epg-context-output-file context))
          (buffer-string)))))
 
 (defun epg-wait-for-status (context status-list)
          (insert-file-contents (epg-context-output-file context))
          (buffer-string)))))
 
 (defun epg-wait-for-status (context status-list)

+  "Wait until one of elements in STATUS-LIST arrives."

   (with-current-buffer (process-buffer (epg-context-process context))
     (setq epg-pending-status-list status-list)
     (while (and (eq (process-status (epg-context-process context)) 'run)
   (with-current-buffer (process-buffer (epg-context-process context))
     (setq epg-pending-status-list status-list)
     (while (and (eq (process-status (epg-context-process context)) 'run)

@@ -314,22 +896,24 @@ This function is for internal use only."
       (accept-process-output (epg-context-process context) 1))))
 
 (defun epg-wait-for-completion (context)
       (accept-process-output (epg-context-process context) 1))))
 
 (defun epg-wait-for-completion (context)

-  (if (eq (process-status (epg-context-process context)) 'run)
-      (process-send-eof (epg-context-process context)))
+  "Wait until the `epg-gpg-program' process completes."

   (while (eq (process-status (epg-context-process context)) 'run)
   (while (eq (process-status (epg-context-process context)) 'run)

-    ;; We can't use accept-process-output instead of sit-for here
-    ;; because it may cause an interrupt during the sentinel execution.
-    (sit-for 0.1)))
+    (accept-process-output (epg-context-process context) 1)))

 
 (defun epg-reset (context)
 
 (defun epg-reset (context)

+  "Reset the CONTEXT."

   (if (and (epg-context-process context)
           (buffer-live-p (process-buffer (epg-context-process context))))
       (kill-buffer (process-buffer (epg-context-process context))))
   (if (and (epg-context-process context)
           (buffer-live-p (process-buffer (epg-context-process context))))
       (kill-buffer (process-buffer (epg-context-process context))))

-  (epg-context-set-process context nil)
-  (if (file-exists-p (epg-context-output-file context))
+  (epg-context-set-process context nil))
+
+(defun epg-delete-output-file (context)
+  "Delete the output file of CONTEXT."
+  (if (and (epg-context-output-file context)
+          (file-exists-p (epg-context-output-file context)))

       (delete-file (epg-context-output-file context))))
 
       (delete-file (epg-context-output-file context))))
 

-(defun epg-status-USERID_HINT (process string)
+(defun epg--status-USERID_HINT (context string)

   (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
       (let* ((key-id (match-string 1 string))
             (user-id (match-string 2 string))
   (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
       (let* ((key-id (match-string 1 string))
             (user-id (match-string 2 string))

@@ -339,253 +923,536 @@ This function is for internal use only."
          (setq epg-user-id-alist (cons (cons key-id user-id)
                                        epg-user-id-alist))))))
 
          (setq epg-user-id-alist (cons (cons key-id user-id)
                                        epg-user-id-alist))))))
 

-(defun epg-status-NEED_PASSPHRASE (process string)
+(defun epg--status-NEED_PASSPHRASE (context string)

   (if (string-match "\\`\\([^ ]+\\)" string)
       (setq epg-key-id (match-string 1 string))))
 
   (if (string-match "\\`\\([^ ]+\\)" string)
       (setq epg-key-id (match-string 1 string))))
 

-(defun epg-status-NEED_PASSPHRASE_SYM (process string)
+(defun epg--status-NEED_PASSPHRASE_SYM (context string)

   (setq epg-key-id 'SYM))
 
   (setq epg-key-id 'SYM))
 

-(defun epg-status-NEED_PASSPHRASE_PIN (process string)
+(defun epg--status-NEED_PASSPHRASE_PIN (context string)

   (setq epg-key-id 'PIN))
 
   (setq epg-key-id 'PIN))
 

-(defun epg-status-GET_HIDDEN (process string)
-  (let ((passphrase
-        (funcall (car (epg-context-passphrase-callback-info epg-context))
-                 epg-key-id
-                 (cdr (epg-context-passphrase-callback-info epg-context))))
-       string)
-    (if passphrase
+(defun epg--status-GET_HIDDEN (context string)
+  (if (and epg-key-id
+          (string-match "\\`passphrase\\." string))
+      (let (inhibit-quit
+           passphrase
+           passphrase-with-new-line)

        (unwind-protect
        (unwind-protect

-           (progn
-             (setq string (concat passphrase "\n"))
-             (fillarray passphrase 0)
-             (setq passphrase nil)
-             (process-send-string process string))
-         (if string
-             (fillarray string 0))))))
-
-(defun epg-status-GET_BOOL (process string)
-  (let ((entry (assoc string epg-prompt-alist)))
-    (if (y-or-n-p (if entry (cdr entry) (concat string "? ")))
-       (process-send-string process "y\n")
-      (process-send-string process "n\n"))))
-
-(defun epg-status-GET_LINE (process string)
-  (let* ((entry (assoc string epg-prompt-alist))
-        (string (read-string (if entry (cdr entry) (concat string ": ")))))
-    (process-send-string process (concat string "\n")))))
-
-(defun epg-status-GOODSIG (process string)
-  (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
-      (epg-context-set-result-for
-       epg-context
-       'verify
-       (cons (epg-make-signature 'good
-                                (match-string 1 string)
-                                (match-string 2 string))
-            (epg-context-result-for epg-context 'verify)))))
-
-(defun epg-status-EXPSIG (process string)
+           (condition-case nil
+               (progn
+                 (setq passphrase
+                       (funcall
+                        (if (consp (epg-context-passphrase-callback context))
+                            (car (epg-context-passphrase-callback context))
+                          (epg-context-passphrase-callback context))
+                        context
+                        epg-key-id
+                        (if (consp (epg-context-passphrase-callback context))
+                            (cdr (epg-context-passphrase-callback context)))))
+                 (when passphrase
+                   (setq passphrase-with-new-line (concat passphrase "\n"))
+                   (fillarray passphrase 0)
+                   (setq passphrase nil)
+                   (process-send-string (epg-context-process context)
+                                        passphrase-with-new-line)))
+             (quit
+              (epg-context-set-result-for
+               context 'error
+               (cons '(quit)
+                     (epg-context-result-for context 'error)))
+              (delete-process (epg-context-process context))))
+         (if passphrase
+             (fillarray passphrase 0))
+         (if passphrase-with-new-line
+             (fillarray passphrase-with-new-line 0))))))
+
+(defun epg--status-GET_BOOL (context string)
+  (let ((entry (assoc string epg-prompt-alist))
+       inhibit-quit)
+    (condition-case nil
+      (if (y-or-n-p (if entry (cdr entry) (concat string "? ")))
+         (process-send-string (epg-context-process context) "y\n")
+       (process-send-string (epg-context-process context) "n\n"))
+      (quit
+       (epg-context-set-result-for
+       context 'error
+       (cons '(quit)
+             (epg-context-result-for context 'error)))
+       (delete-process (epg-context-process context))))))
+
+(defun epg--status-GET_LINE (context string)
+  (let ((entry (assoc string epg-prompt-alist))
+       inhibit-quit)
+    (condition-case nil
+       (process-send-string (epg-context-process context)
+                            (concat (read-string
+                                     (if entry
+                                         (cdr entry)
+                                       (concat string ": ")))
+                                    "\n"))
+      (quit
+       (epg-context-set-result-for
+       context 'error
+       (cons '(quit)
+             (epg-context-result-for context 'error)))
+       (delete-process (epg-context-process context))))))
+
+(defun epg--status-*SIG (context status string)

   (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
   (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)

-      (epg-context-set-result-for
-       epg-context
-       'verify
-       (cons (epg-make-signature 'expired
-                                (match-string 1 string)
-                                (match-string 2 string))
-            (epg-context-result-for epg-context 'verify)))))
-
-(defun epg-status-EXPKEYSIG (process string)
-  (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
-      (epg-context-set-result-for
-       epg-context
-       'verify
-       (cons (epg-make-signature 'expired-key
-                                (match-string 1 string)
-                                (match-string 2 string))
-            (epg-context-result-for epg-context 'verify)))))
-
-(defun epg-status-REVKEYSIG (process string)
-  (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
-      (epg-context-set-result-for
-       epg-context
-       'verify
-       (cons (epg-make-signature 'revoked-key
-                                (match-string 1 string)
-                                (match-string 2 string))
-            (epg-context-result-for epg-context 'verify)))))
-
-(defun epg-status-BADSIG (process string)
-  (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
-      (epg-context-set-result-for
-       epg-context
-       'verify
-       (cons (epg-make-signature 'bad
-                                (match-string 1 string)
-                                (match-string 2 string))
-            (epg-context-result-for epg-context 'verify)))))
-
-(defun epg-status-VALIDSIG (process string)
-  (let ((signature (car (epg-context-result-for epg-context 'verify))))
-    (if (and signature
-            (eq (epg-signature-status signature) 'good)
-            (string-match "\\`\\([^ ]+\\) " string))
-       (epg-signature-set-fingerprint signature (match-string 1 string)))))
+      (let* ((key-id (match-string 1 string))
+            (user-id (match-string 2 string))
+            (entry (assoc key-id epg-user-id-alist)))
+       (epg-context-set-result-for
+        context
+        'verify
+        (cons (epg-make-signature status key-id)
+              (epg-context-result-for context 'verify)))
+       (if (eq (epg-context-protocol context) 'CMS)
+           (condition-case nil
+               (setq user-id (epg-dn-from-string user-id))
+             (error)))
+       (if entry
+           (setcdr entry user-id)
+         (setq epg-user-id-alist
+               (cons (cons key-id user-id) epg-user-id-alist))))
+    (epg-context-set-result-for
+     context
+     'verify
+     (cons (epg-make-signature status)
+          (epg-context-result-for context 'verify)))))
+
+(defun epg--status-GOODSIG (context string)
+  (epg--status-*SIG context 'good string))
+
+(defun epg--status-EXPSIG (context string)
+  (epg--status-*SIG context 'expired string))
+
+(defun epg--status-EXPKEYSIG (context string)
+  (epg--status-*SIG context 'expired-key string))

 
 

-(defun epg-status-TRUST_UNDEFINED (process string)
-  (let ((signature (car (epg-context-result-for epg-context 'verify))))
+(defun epg--status-REVKEYSIG (context string)
+  (epg--status-*SIG context 'revoked-key string))
+
+(defun epg--status-BADSIG (context string)
+  (epg--status-*SIG context 'bad string))
+
+(defun epg--status-NO_PUBKEY (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))
+    (if (and signature
+            (eq (epg-signature-status signature) 'error)
+            (equal (epg-signature-key-id signature) string))
+       (epg-signature-set-status signature 'no-pubkey))))
+
+(defun epg--time-from-seconds (seconds)
+  (let ((number-seconds (string-to-number (concat seconds ".0"))))
+    (cons (floor (/ number-seconds 65536))
+         (floor (mod number-seconds 65536)))))
+
+(defun epg--status-ERRSIG (context string)
+  (if (string-match "\\`\\([^ ]+\\) \\([0-9]+\\) \\([0-9]+\\) \
+\\([0-9A-Fa-f][0-9A-Fa-f]\\) \\([^ ]+\\) \\([0-9]+\\)"
+                   string)
+      (let ((signature (epg-make-signature 'error)))
+       (epg-context-set-result-for context 'verify (list signature))
+       (epg-signature-set-key-id
+        signature
+        (match-string 1 string))
+       (epg-signature-set-pubkey-algorithm
+        signature
+        (string-to-number (match-string 2 string)))
+       (epg-signature-set-digest-algorithm
+        signature
+        (string-to-number (match-string 3 string)))
+       (epg-signature-set-class
+        signature
+        (string-to-number (match-string 4 string) 16))
+       (epg-signature-set-creation-time
+        signature
+        (epg--time-from-seconds (match-string 5 string))))))
+
+(defun epg--status-VALIDSIG (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))
+    (when (and signature
+              (eq (epg-signature-status signature) 'good)
+              (string-match "\\`\\([^ ]+\\) [^ ]+ \\([^ ]+\\) \\([^ ]+\\) \
+\\([0-9]+\\) [^ ]+ \\([0-9]+\\) \\([0-9]+\\) \\([0-9A-Fa-f][0-9A-Fa-f]\\) \
+\\(.*\\)"
+                          string))
+      (epg-signature-set-fingerprint
+       signature
+       (match-string 1 string))
+      (epg-signature-set-creation-time
+       signature
+       (epg--time-from-seconds (match-string 2 string)))
+      (epg-signature-set-expiration-time
+       signature
+       (epg--time-from-seconds (match-string 3 string)))
+      (epg-signature-set-version
+       signature
+       (string-to-number (match-string 4 string)))
+      (epg-signature-set-pubkey-algorithm
+       signature 
+       (string-to-number (match-string 5 string)))
+      (epg-signature-set-digest-algorithm
+       signature
+       (string-to-number (match-string 6 string)))
+      (epg-signature-set-class
+       signature
+       (string-to-number (match-string 7 string) 16)))))
+
+(defun epg--status-TRUST_UNDEFINED (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))

     (if (and signature
             (eq (epg-signature-status signature) 'good))
        (epg-signature-set-validity signature 'undefined))))
 
     (if (and signature
             (eq (epg-signature-status signature) 'good))
        (epg-signature-set-validity signature 'undefined))))
 

-(defun epg-status-TRUST_NEVER (process string)
-  (let ((signature (car (epg-context-result-for epg-context 'verify))))
+(defun epg--status-TRUST_NEVER (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))

     (if (and signature
             (eq (epg-signature-status signature) 'good))
        (epg-signature-set-validity signature 'never))))
 
     (if (and signature
             (eq (epg-signature-status signature) 'good))
        (epg-signature-set-validity signature 'never))))
 

-(defun epg-status-TRUST_MARGINAL (process string)
-  (let ((signature (car (epg-context-result-for epg-context 'verify))))
+(defun epg--status-TRUST_MARGINAL (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))

     (if (and signature
             (eq (epg-signature-status signature) 'marginal))
        (epg-signature-set-validity signature 'marginal))))
 
     (if (and signature
             (eq (epg-signature-status signature) 'marginal))
        (epg-signature-set-validity signature 'marginal))))
 

-(defun epg-status-TRUST_FULLY (process string)
-  (let ((signature (car (epg-context-result-for epg-context 'verify))))
+(defun epg--status-TRUST_FULLY (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))

     (if (and signature
             (eq (epg-signature-status signature) 'good))
     (if (and signature
             (eq (epg-signature-status signature) 'good))

-       (epg-signature-set-validity signature 'fully))))
+       (epg-signature-set-validity signature 'full))))

 
 

-(defun epg-status-TRUST_ULTIMATE (process string)
-  (let ((signature (car (epg-context-result-for epg-context 'verify))))
+(defun epg--status-TRUST_ULTIMATE (context string)
+  (let ((signature (car (epg-context-result-for context 'verify))))

     (if (and signature
             (eq (epg-signature-status signature) 'good))
        (epg-signature-set-validity signature 'ultimate))))
 
     (if (and signature
             (eq (epg-signature-status signature) 'good))
        (epg-signature-set-validity signature 'ultimate))))
 

-(defun epg-status-PROGRESS (process string)
+(defun epg--status-PROGRESS (context string)

   (if (string-match "\\`\\([^ ]+\\) \\([^ ]\\) \\([0-9]+\\) \\([0-9]+\\)"
                    string)
   (if (string-match "\\`\\([^ ]+\\) \\([^ ]\\) \\([0-9]+\\) \\([0-9]+\\)"
                    string)

-      (funcall (car (epg-context-progress-callback-info epg-context))
+      (funcall (if (consp (epg-context-progress-callback context))
+                  (car (epg-context-progress-callback context))
+                (epg-context-progress-callback context))
+              context

               (match-string 1 string)
               (match-string 2 string)
               (string-to-number (match-string 3 string))
               (string-to-number (match-string 4 string))
               (match-string 1 string)
               (match-string 2 string)
               (string-to-number (match-string 3 string))
               (string-to-number (match-string 4 string))

-              (cdr (epg-context-progress-callback-info epg-context)))))
+              (if (consp (epg-context-progress-callback context))
+                  (cdr (epg-context-progress-callback context))))))
+
+(defun epg--status-DECRYPTION_FAILED (context string)
+  (epg-context-set-result-for
+   context 'error
+   (cons '(decryption-failed)
+        (epg-context-result-for context 'error))))

 
 

-(defun epg-status-DECRYPTION_FAILED (process string)
+(defun epg--status-NODATA (context string)

   (epg-context-set-result-for
   (epg-context-set-result-for

-   epg-context 'error
-   (cons 'decryption-failed
-        (epg-context-result-for epg-context 'error))))
+   context 'error
+   (cons (list 'no-data (cons 'reason (string-to-number string)))
+        (epg-context-result-for context 'error))))

 
 

-(defun epg-status-NODATA (process string)
+(defun epg--status-UNEXPECTED (context string)

   (epg-context-set-result-for
   (epg-context-set-result-for

-   epg-context 'error
-   (cons (cons 'no-data (string-to-number string))
-        (epg-context-result-for epg-context 'error))))
+   context 'error
+   (cons (list 'unexpected (cons 'reason (string-to-number string)))
+        (epg-context-result-for context 'error))))

 
 

-(defun epg-status-UNEXPECTED (process string)
+(defun epg--status-KEYEXPIRED (context string)

   (epg-context-set-result-for
   (epg-context-set-result-for

-   epg-context 'error
-   (cons (cons 'unexpected (string-to-number string))
-        (epg-context-result-for epg-context 'error))))
+   context 'error
+   (cons (list 'key-expired (cons 'expiration-time
+                                 (epg--time-from-seconds string)))
+        (epg-context-result-for context 'error))))

 
 

-(defun epg-status-KEYEXPIRED (process string)
+(defun epg--status-KEYREVOKED (context string)

   (epg-context-set-result-for
   (epg-context-set-result-for

-   epg-context 'error
-   (cons (cons 'key-expired string)
-        (epg-context-result-for epg-context 'error))))
+   context 'error
+   (cons '(key-revoked)
+        (epg-context-result-for context 'error))))

 
 

-(defun epg-status-KEYREVOKED (process string)
+(defun epg--status-BADARMOR (context string)

   (epg-context-set-result-for
   (epg-context-set-result-for

-   epg-context 'error
-   (cons 'key-revoked
-        (epg-context-result-for epg-context 'error))))
+   context 'error
+   (cons '(bad-armor)
+        (epg-context-result-for context 'error))))
+
+(defun epg--status-INV_RECP (context string)
+  (if (string-match "\\`\\([0-9]+\\) \\(.*\\)" string)
+      (epg-context-set-result-for
+       context 'error
+       (cons (list 'invalid-recipient
+                  (cons 'reason
+                        (string-to-number (match-string 1 string)))
+                  (cons 'requested-recipient
+                        (match-string 2 string)))
+            (epg-context-result-for context 'error)))))
+
+(defun epg--status-NO_RECP (context string)
+  (epg-context-set-result-for
+   context 'error
+   (cons '(no-recipients)
+        (epg-context-result-for context 'error))))
+
+(defun epg--status-DELETE_PROBLEM (context string)
+  (if (string-match "\\`\\([0-9]+\\)" string)
+      (epg-context-set-result-for
+       context 'error
+       (cons (list 'delete-problem
+                  (cons 'reason (string-to-number (match-string 1 string))))
+            (epg-context-result-for context 'error)))))
+
+(defun epg--status-SIG_CREATED (context string)
+  (if (string-match "\\`\\([DCS]\\) \\([0-9]+\\) \\([0-9]+\\) \
+\\([0-9A-Fa-F][0-9A-Fa-F]\\) \\(.*\\) " string)
+      (epg-context-set-result-for
+       context 'sign
+       (cons (epg-make-new-signature
+             (cdr (assq (aref (match-string 1 string) 0)
+                        epg-new-signature-type-alist))
+             (string-to-number (match-string 2 string))
+             (string-to-number (match-string 3 string))
+             (string-to-number (match-string 4 string) 16)
+             (epg--time-from-seconds (match-string 5 string))
+             (substring string (match-end 0)))
+            (epg-context-result-for context 'sign)))))
+
+(defun epg--status-KEY_CREATED (context string)
+  (if (string-match "\\`\\([BPS]\\) \\([^ ]+\\)" string)
+      (epg-context-set-result-for
+       context 'generate-key
+       (cons (list (cons 'type (string-to-char (match-string 1 string)))
+                  (cons 'fingerprint (match-string 2 string)))
+            (epg-context-result-for context 'generate-key)))))

 
 

-(defun epg-status-BADARMOR (process string)
+(defun epg--status-KEY_NOT_CREATED (context string)

   (epg-context-set-result-for
   (epg-context-set-result-for

-   epg-context 'error
-   (cons 'bad-armor
-        (epg-context-result-for epg-context 'error))))
-
-(defun epg-passphrase-callback-function (key-id handback)
-  (read-passwd
-   (if (eq key-id 'SYM)
-       "Passphrase for symmetric encryption: "
+   context 'error
+   (cons '(key-not-created)
+        (epg-context-result-for context 'error))))
+
+(defun epg--status-IMPORTED (context string)
+  (if (string-match "\\`\\([^ ]+\\) \\(.*\\)" string)
+      (let* ((key-id (match-string 1 string))
+            (user-id (match-string 2 string))
+            (entry (assoc key-id epg-user-id-alist)))
+       (if entry
+           (setcdr entry user-id)
+         (setq epg-user-id-alist (cons (cons key-id user-id)
+                                       epg-user-id-alist)))
+       (epg-context-set-result-for
+        context 'import
+        (cons (list (cons 'key-id key-id)
+                    (cons 'user-id user-id))
+              (epg-context-result-for context 'import))))))
+
+(defun epg--status-IMPORT_OK (context string)
+  (let ((result (epg-context-result-for context 'import)))
+    (if (and result
+            (string-match "\\`\\([0-9]+\\)\\( \\(.+\\)\\)?" string))
+       (setcar result
+               (append (list (cons 'reason
+                                   (string-to-number
+                                    (match-string 1 string))))
+                       (if (match-beginning 2)
+                           (list (cons 'fingerprint
+                                       (match-string 3 string))))
+                       (car result))))))
+
+(defun epg--status-IMPORT_PROBLEM (context string)
+  (if (string-match "\\`\\([0-9]+\\)\\( \\(.+\\)\\)?" string)
+      (epg-context-set-result-for
+       context 'error
+       (cons (cons 'import-problem
+                  (append (list (cons 'reason
+                                      (string-to-number
+                                       (match-string 1 string))))
+                          (if (match-beginning 2)
+                              (list (cons 'fingerprint
+                                          (match-string 3 string))))))
+            (epg-context-result-for context 'error)))))
+
+(defun epg-passphrase-callback-function (context key-id handback)
+  (if (eq key-id 'SYM)
+      (read-passwd "Passphrase for symmetric encryption: "
+                  (eq (epg-context-operation context) 'encrypt))
+    (read-passwd

      (if (eq key-id 'PIN)
      (if (eq key-id 'PIN)

-        "Passphrase for PIN: "
+       "Passphrase for PIN: "

        (let ((entry (assoc key-id epg-user-id-alist)))
         (if entry
             (format "Passphrase for %s %s: " key-id (cdr entry))
           (format "Passphrase for %s: " key-id)))))))
 
        (let ((entry (assoc key-id epg-user-id-alist)))
         (if entry
             (format "Passphrase for %s %s: " key-id (cdr entry))
           (format "Passphrase for %s: " key-id)))))))
 

-(defun epg-progress-callback-function (what char current total handback)
+(defun epg-progress-callback-function (context what char current total
+                                              handback)

   (message "%s: %d%%/%d%%" what current total))
 
   (message "%s: %d%%/%d%%" what current total))
 

-(defun epg-list-keys (name &optional secret)
-  "List keys associated with STRING."
-  (let ((args (list "--with-colons" "--no-greeting" "--batch"
-                   "--fixed-list-mode"
-                   (if secret "--list-secret-keys" "--list-keys")
-                   name))
-       keys type symbol pointer)
+(defun epg-configuration ()
+  "Return a list of internal configuration parameters of `epg-gpg-program'."
+  (let (config type)

     (with-temp-buffer
     (with-temp-buffer

-      (apply #'call-process epg-gpg-program nil (list t nil) nil args)
+      (apply #'call-process epg-gpg-program nil (list t nil) nil
+            '("--with-colons" "--list-config"))

       (goto-char (point-min))
       (goto-char (point-min))

-      (while (looking-at "\\([a-z][a-z][a-z]\\):\\(.*\\)")
-       (setq type (match-string 1)
-             symbol (intern-soft (format "epg-colons-%s-spec" type)))
-       (if (member type '("pub" "sec"))
-           (setq keys (cons nil keys)))
-       (if (and symbol
-                (boundp symbol))
-           (setcar keys (cons (cons (intern type)
-                                    (epg-parse-colons
-                                     (symbol-value symbol)
-                                     (match-string 2)))
-                              (car keys))))
-       (forward-line)))
-    (setq pointer keys)
+      (while (re-search-forward "^cfg:\\([^:]+\\):\\(.*\\)" nil t)
+       (setq type (intern (match-string 1))
+             config (cons (cons type
+                                (if (memq type
+                                          '(pubkey cipher digest compress))
+                                    (mapcar #'string-to-number
+                                            (delete "" (split-string
+                                                        (match-string 2)
+                                                        ";")))
+                                  (match-string 2)))
+                          config))))
+    config))
+
+(defun epg--list-keys-1 (context name mode)
+  (let ((args (append (list "--with-colons" "--no-greeting" "--batch"
+                           "--with-fingerprint"
+                           "--with-fingerprint"
+                           (if (memq mode '(t secret))
+                               "--list-secret-keys"
+                             (if (memq mode '(nil public))
+                                 "--list-keys"
+                               "--list-sigs")))
+                     (unless (eq (epg-context-protocol context) 'CMS)
+                       '("--fixed-list-mode"))
+                     (if name (list name))))
+       keys string field index)
+    (with-temp-buffer
+      (apply #'call-process
+            (if (eq (epg-context-protocol context) 'CMS)
+                epg-gpgsm-program
+              epg-gpg-program)
+            nil (list t nil) nil args)
+      (goto-char (point-min))
+      (while (re-search-forward "^[a-z][a-z][a-z]:.*" nil t)
+       (setq keys (cons (make-vector 15 nil) keys)
+             string (match-string 0)
+             index 0
+             field 0)
+       (while (eq index
+                  (string-match "\\([^:]+\\)?:" string index))
+         (setq index (match-end 0))
+         (aset (car keys) field (match-string 1 string))
+         (setq field (1+ field))))
+      (nreverse keys))))
+
+(defun epg--make-sub-key-1 (line)
+  (epg-make-sub-key
+   (if (aref line 1)
+       (cdr (assq (string-to-char (aref line 1)) epg-key-validity-alist)))
+   (delq nil
+        (mapcar (lambda (char) (cdr (assq char epg-key-capablity-alist)))
+                (aref line 11)))
+   (member (aref line 0) '("sec" "ssb"))
+   (string-to-number (aref line 3))
+   (string-to-number (aref line 2))
+   (aref line 4)
+   (epg--time-from-seconds (aref line 5))
+   (epg--time-from-seconds (aref line 6))))
+
+;;;###autoload
+(defun epg-list-keys (context &optional name mode)
+  "Return a list of epg-key objects matched with NAME.
+If MODE is nil or 'public, only public keyring should be searched.
+If MODE is t or 'secret, only secret keyring should be searched. 
+Otherwise, only public keyring should be searched and the key
+signatures should be included."
+  (let ((lines (epg--list-keys-1 context name mode))
+       keys cert pointer pointer-1)
+    (while lines
+      (cond
+       ((member (aref (car lines) 0) '("pub" "sec" "crt" "crs"))
+       (setq cert (member (aref (car lines) 0) '("crt" "crs"))
+             keys (cons (epg-make-key
+                         (if (aref (car lines) 8)
+                             (cdr (assq (string-to-char (aref (car lines) 8))
+                                        epg-key-validity-alist))))
+                        keys))
+       (epg-key-set-sub-key-list
+        (car keys)
+        (cons (epg--make-sub-key-1 (car lines))
+              (epg-key-sub-key-list (car keys)))))
+       ((member (aref (car lines) 0) '("sub" "ssb"))
+       (epg-key-set-sub-key-list
+        (car keys)
+        (cons (epg--make-sub-key-1 (car lines))
+              (epg-key-sub-key-list (car keys)))))
+       ((equal (aref (car lines) 0) "uid")
+       (epg-key-set-user-id-list
+        (car keys)
+        (cons (epg-make-user-id
+               (if (aref (car lines) 1)
+                   (cdr (assq (string-to-char (aref (car lines) 1))
+                              epg-key-validity-alist)))
+               (if cert
+                   (condition-case nil
+                       (epg-dn-from-string (aref (car lines) 9))
+                     (error (aref (car lines) 9)))
+                 (aref (car lines) 9)))
+              (epg-key-user-id-list (car keys)))))
+       ((equal (aref (car lines) 0) "fpr")
+       (epg-sub-key-set-fingerprint (car (epg-key-sub-key-list (car keys)))
+                                    (aref (car lines) 9)))
+       ((equal (aref (car lines) 0) "sig")
+       (epg-user-id-set-signature-list
+        (car (epg-key-user-id-list (car keys)))
+        (cons
+         (epg-make-key-signature
+          (if (aref (car lines) 1)
+              (cdr (assq (string-to-char (aref (car lines) 1))
+                         epg-key-validity-alist)))
+          (string-to-number (aref (car lines) 3))
+          (aref (car lines) 4)
+          (epg--time-from-seconds (aref (car lines) 5))
+          (epg--time-from-seconds (aref (car lines) 6))
+          (aref (car lines) 9)
+          (string-to-number (aref (car lines) 10) 16)
+          (eq (aref (aref (car lines) 10) 2) ?x))
+         (epg-user-id-signature-list
+          (car (epg-key-user-id-list (car keys))))))))
+      (setq lines (cdr lines)))
+    (setq keys (nreverse keys)
+         pointer keys)

     (while pointer
     (while pointer

-      (setcar pointer (nreverse (car pointer)))
+      (epg-key-set-sub-key-list
+       (car pointer)
+       (nreverse (epg-key-sub-key-list (car pointer))))
+      (setq pointer-1 (epg-key-set-user-id-list
+                         (car pointer)
+                         (nreverse (epg-key-user-id-list (car pointer)))))
+      (while pointer-1
+       (epg-user-id-set-signature-list
+        (car pointer-1)
+        (nreverse (epg-user-id-signature-list (car pointer-1))))
+       (setq pointer-1 (cdr pointer-1)))

       (setq pointer (cdr pointer)))
       (setq pointer (cdr pointer)))

-    (nreverse keys)))
-
-(defun epg-parse-colons (alist string)
-  (let ((index 0)
-       result)
-    (while (and alist
-               (or (null (car alist))
-                   (eq index
-                       (string-match
-                        (concat "\\(" (nth 1 (car alist)) "\\)?:")
-                        string index))))
-      (if (car alist)
-         (progn
-           (setq index (match-end 0))
-           (if (match-beginning 1)
-               (setq result
-                     (cons (cons (car (car alist))
-                                 (funcall (or (nth 3 (car alist)) #'identity)
-                                          (match-string
-                                           (1+ (or (nth 2 (car alist)) 0))
-                                           string)))
-                           result))))
-       (setq index (1+ index)))
-      (setq alist (cdr alist)))
-    (nreverse result)))
+    keys))

 
 (if (fboundp 'make-temp-file)
 
 (if (fboundp 'make-temp-file)

-    (defalias 'epg-make-temp-file 'make-temp-file)
+    (defalias 'epg--make-temp-file 'make-temp-file)
+  (defvar temporary-file-directory)

   ;; stolen from poe.el.
   ;; stolen from poe.el.

-  (defun epg-make-temp-file (prefix)
+  (defun epg--make-temp-file (prefix)

     "Create a temporary file.
 The returned file name (created by appending some random characters at the end
 of PREFIX, and expanding against `temporary-file-directory' if necessary),
 is guaranteed to point to a newly created empty file.
 You can then use `write-region' to write new data into the file."
     (let (tempdir tempfile)
     "Create a temporary file.
 The returned file name (created by appending some random characters at the end
 of PREFIX, and expanding against `temporary-file-directory' if necessary),
 is guaranteed to point to a newly created empty file.
 You can then use `write-region' to write new data into the file."
     (let (tempdir tempfile)

+      (setq prefix (expand-file-name prefix
+                                    (if (featurep 'xemacs)
+                                        (temp-directory)
+                                      temporary-file-directory)))

       (unwind-protect
          (let (file)
            ;; First, create a temporary directory.
       (unwind-protect
          (let (file)
            ;; First, create a temporary directory.

@@ -626,158 +1493,278 @@ You can then use `write-region' to write new data into the file."
             (delete-directory tempdir))))))
 
 ;;;###autoload
             (delete-directory tempdir))))))
 
 ;;;###autoload

-(defun epg-start-decrypt (context input-file)
-  "Initiate a decrypt operation on INPUT-FILE.
+(defun epg-cancel (context)
+  (if (buffer-live-p (process-buffer (epg-context-process context)))
+      (save-excursion
+       (set-buffer (process-buffer (epg-context-process context)))
+       (epg-context-set-result-for
+        epg-context 'error
+        (cons '(quit)
+              (epg-context-result-for epg-context 'error)))))
+  (if (eq (process-status (epg-context-process context)) 'run)
+      (delete-process (epg-context-process context))))
+  
+;;;###autoload
+(defun epg-start-decrypt (context cipher)
+  "Initiate a decrypt operation on CIPHER.
+CIPHER is a data object.

 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function

-`epg-decrypt-string' instead."
+`epg-decrypt-file' or `epg-decrypt-string' instead."
+  (unless (epg-data-file cipher)
+    (error "Not a file"))
+  (epg-context-set-operation context 'decrypt)

   (epg-context-set-result context nil)
   (epg-context-set-result context nil)

-  (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
-  (epg-start context
-            (list "--decrypt" input-file))
-  (epg-wait-for-status context '("BEGIN_DECRYPTION")))
+  (epg--start context (list "--decrypt" (epg-data-file cipher)))
+  ;; `gpgsm' does not read passphrase from stdin, so waiting is not needed.
+  (unless (eq (epg-context-protocol context) 'CMS)
+    (epg-wait-for-status context '("BEGIN_DECRYPTION"))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-decrypt-file (context input-file)
-  "Decrypt INPUT-FILE and return the plain text."
+(defun epg-decrypt-file (context cipher plain)
+  "Decrypt a file CIPHER and store the result to a file PLAIN.
+If PLAIN is nil, it returns the result as a string."

   (unwind-protect
       (progn
   (unwind-protect
       (progn

-       (epg-start-decrypt context input-file)
+       (if plain
+           (epg-context-set-output-file context plain)
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output")))
+       (epg-start-decrypt context (epg-make-data-from-file cipher))

        (epg-wait-for-completion context)
        (if (epg-context-result-for context 'error)
        (epg-wait-for-completion context)
        (if (epg-context-result-for context 'error)

-           (error "Decryption failed"))
-       (epg-read-output context))
+           (error "Decrypt failed: %S"
+                  (epg-context-result-for context 'error)))
+       (unless plain
+         (epg-read-output context)))
+    (unless plain
+      (epg-delete-output-file context))

     (epg-reset context)))
 
 ;;;###autoload
     (epg-reset context)))
 
 ;;;###autoload

-(defun epg-decrypt-string (context string)
-  "Decrypt STRING and return the plain text."
-  (let ((input-file (epg-make-temp-file "epg-input"))
+(defun epg-decrypt-string (context cipher)
+  "Decrypt a string CIPHER and return the plain text."
+  (let ((input-file (epg--make-temp-file "epg-input"))

        (coding-system-for-write 'binary))
     (unwind-protect
        (progn
        (coding-system-for-write 'binary))
     (unwind-protect
        (progn

-         (write-region string nil input-file)
-         (epg-decrypt-file context input-file))
+         (write-region cipher nil input-file nil 'quiet)
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output"))
+         (epg-start-decrypt context (epg-make-data-from-file input-file))
+         (epg-wait-for-completion context)
+         (if (epg-context-result-for context 'error)
+             (error "Decrypt failed: %S"
+                    (epg-context-result-for context 'error)))
+         (epg-read-output context))
+      (epg-delete-output-file context)

       (if (file-exists-p input-file)
       (if (file-exists-p input-file)

-         (delete-file input-file)))))
+         (delete-file input-file))
+      (epg-reset context))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-start-verify (context signature &optional string)
+(defun epg-start-verify (context signature &optional signed-text)

   "Initiate a verify operation on SIGNATURE.
   "Initiate a verify operation on SIGNATURE.

+SIGNATURE and SIGNED-TEXT are a data object if they are specified.

 
 

-For a detached signature, both SIGNATURE and STRING should be string.
-For a normal or a clear text signature, STRING should be nil.
+For a detached signature, both SIGNATURE and SIGNED-TEXT should be set.
+For a normal or a clear text signature, SIGNED-TEXT should be nil.

 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function

-`epg-verify-string' instead."
+`epg-verify-file' or `epg-verify-string' instead."
+  (epg-context-set-operation context 'verify)

   (epg-context-set-result context nil)
   (epg-context-set-result context nil)

-  (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
-  (if string
+  (if signed-text

       ;; Detached signature.
       ;; Detached signature.

-      (progn
-       (epg-start context
-                  (append (list "--verify")
-                          (list signature "-")))
+      (if (epg-data-file signed-text)
+         (epg--start context (list "--verify" (epg-data-file signature)
+                                  (epg-data-file signed-text)))
+       (epg--start context (list "--verify" (epg-data-file signature) "-"))

        (if (eq (process-status (epg-context-process context)) 'run)
        (if (eq (process-status (epg-context-process context)) 'run)

-           (process-send-string (epg-context-process context) string)))
+           (process-send-string (epg-context-process context)
+                                (epg-data-string signed-text)))
+       (if (eq (process-status (epg-context-process context)) 'run)
+           (process-send-eof (epg-context-process context))))

     ;; Normal (or cleartext) signature.
     ;; Normal (or cleartext) signature.

-    (epg-start context (list "--verify"))
-    (if (eq (process-status (epg-context-process context)) 'run)
-       (process-send-string (epg-context-process context) signature))))
+    (if (epg-data-file signature)
+       (epg--start context (list "--verify" (epg-data-file signature)))
+      (epg--start context (list "--verify"))
+      (if (eq (process-status (epg-context-process context)) 'run)
+         (process-send-string (epg-context-process context)
+                              (epg-data-string signature)))
+      (if (eq (process-status (epg-context-process context)) 'run)
+         (process-send-eof (epg-context-process context))))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-verify-file (context input-file &optional string)
-  "Verify INPUT-FILE.
+(defun epg-verify-file (context signature &optional signed-text plain)
+  "Verify a file SIGNATURE.
+SIGNED-TEXT and PLAIN are also a file if they are specified.

 
 

-For a detached signature, both INPUT-FILE and STRING should be string.
-For a normal or a clear text signature, STRING should be nil."
+For a detached signature, both SIGNATURE and SIGNED-TEXT should be string.
+For a normal or a clear text signature, SIGNED-TEXT should be nil."

   (unwind-protect
       (progn
   (unwind-protect
       (progn

-       (epg-start-verify context input-file string)
+       (if plain
+           (epg-context-set-output-file context plain)
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output")))
+       (if signed-text
+           (epg-start-verify context
+                             (epg-make-data-from-file signature)
+                             (epg-make-data-from-file signed-text))
+         (epg-start-verify context
+                           (epg-make-data-from-file signature)))

        (epg-wait-for-completion context)
        (epg-wait-for-completion context)

-       (epg-context-result-for context 'verify))
+;      (if (epg-context-result-for context 'error)
+;          (error "Verify failed: %S"
+;                 (epg-context-result-for context 'error)))
+       (unless plain
+         (epg-read-output context)))
+    (unless plain
+      (epg-delete-output-file context))

     (epg-reset context)))
 
 ;;;###autoload
     (epg-reset context)))
 
 ;;;###autoload

-(defun epg-verify-string (context signature &optional string)
-  "Verify SIGNATURE.
-
-For a detached signature, both SIGNATURE and STRING should be string.
-For a normal or a clear text signature, STRING should be nil."
-  (let ((input-file (epg-make-temp-file "epg-input"))
-       (coding-system-for-write 'binary))
+(defun epg-verify-string (context signature &optional signed-text)
+  "Verify a string SIGNATURE.
+SIGNED-TEXT is a string if it is specified.
+
+For a detached signature, both SIGNATURE and SIGNED-TEXT should be string.
+For a normal or a clear text signature, SIGNED-TEXT should be nil."
+  (let ((coding-system-for-write 'binary)
+       input-file)

     (unwind-protect
        (progn
     (unwind-protect
        (progn

-         (if string
-             (write-region signature nil input-file))
-         (epg-verify-file context input-file string))
-      (if (file-exists-p input-file)
-         (delete-file input-file)))))
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output"))
+         (if signed-text
+             (progn
+               (setq input-file (epg--make-temp-file "epg-signature"))
+               (write-region signature nil input-file nil 'quiet)
+               (epg-start-verify context
+                                 (epg-make-data-from-file input-file)
+                                 (epg-make-data-from-string signed-text)))
+           (epg-start-verify context (epg-make-data-from-string signature)))
+         (epg-wait-for-completion context)
+;        (if (epg-context-result-for context 'error)
+;            (error "Verify failed: %S"
+;                   (epg-context-result-for context 'error)))
+         (epg-read-output context))
+      (epg-delete-output-file context)
+      (if (and input-file
+              (file-exists-p input-file))
+         (delete-file input-file))
+      (epg-reset context))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-start-sign (context string &optional mode)
-  "Initiate a sign operation on STRING.
+(defun epg-start-sign (context plain &optional mode)
+  "Initiate a sign operation on PLAIN.
+PLAIN is a data object.

 
 

-If optional 3rd argument MODE is 'clearsign, it makes a clear text signature.
-If MODE is t or 'detached, it makes a detached signature.
-Otherwise, it makes a normal signature.
+If optional 3rd argument MODE is t or 'detached, it makes a detached signature.
+If it is nil or 'normal, it makes a normal signature.
+Otherwise, it makes a clear text signature.

 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function

-`epg-sign-string' instead."
+`epg-sign-file' or `epg-sign-string' instead."
+  (epg-context-set-operation context 'sign)

   (epg-context-set-result context nil)
   (epg-context-set-result context nil)

-  (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
-  (epg-start context
-            (append (list (if (eq mode 'clearsign)
-                              "--clearsign"
-                            (if (or (eq mode t) (eq mode 'detached))
-                                "--detach-sign"
-                              "--sign")))
+  (epg--start context
+            (append (list (if (memq mode '(t detached))
+                              "--detach-sign"
+                            (if (memq mode '(nil normal))
+                                "--sign"
+                              "--clearsign")))

                     (apply #'nconc
                     (apply #'nconc

-                           (mapcar (lambda (signer)
-                                     (list "-u" signer))
-                                   (epg-context-signers context)))))
-  (epg-wait-for-status context '("BEGIN_SIGNING"))
-  (if (eq (process-status (epg-context-process context)) 'run)
-      (process-send-string (epg-context-process context) string)))
+                           (mapcar
+                            (lambda (signer)
+                              (list "-u"
+                                    (epg-sub-key-id
+                                     (car (epg-key-sub-key-list signer)))))
+                            (epg-context-signers context)))
+                    (if (epg-data-file plain)
+                        (list (epg-data-file plain)))))
+  ;; `gpgsm' does not read passphrase from stdin, so waiting is not needed.
+  (unless (eq (epg-context-protocol context) 'CMS)
+    (epg-wait-for-status context '("BEGIN_SIGNING")))
+  (when (epg-data-string plain)
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-string (epg-context-process context)
+                            (epg-data-string plain)))
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-eof (epg-context-process context)))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-sign-string (context string &optional mode)
-  "Sign STRING and return the output as string.
-If optional 3rd argument MODE is 'clearsign, it makes a clear text signature.
-If MODE is t or 'detached, it makes a detached signature.
-Otherwise, it makes a normal signature."
+(defun epg-sign-file (context plain signature &optional mode)
+  "Sign a file PLAIN and store the result to a file SIGNATURE.
+If SIGNATURE is nil, it returns the result as a string.
+If optional 3rd argument MODE is t or 'detached, it makes a detached signature.
+If it is nil or 'normal, it makes a normal signature.
+Otherwise, it makes a clear text signature."

   (unwind-protect
       (progn
   (unwind-protect
       (progn

-       (epg-start-sign context string mode)
+       (if signature
+           (epg-context-set-output-file context signature)
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output")))
+       (epg-start-sign context (epg-make-data-from-file plain) mode)

        (epg-wait-for-completion context)
        (epg-wait-for-completion context)

-       (if (epg-context-result-for context 'error)
-           (error "Sign failed"))
+       (unless (epg-context-result-for context 'sign)
+         (if (epg-context-result-for context 'error)
+             (error "Sign failed: %S"
+                    (epg-context-result-for context 'error))
+           (error "Sign failed")))
+       (unless signature
+         (epg-read-output context)))
+    (unless signature
+      (epg-delete-output-file context))
+    (epg-reset context)))
+
+;;;###autoload
+(defun epg-sign-string (context plain &optional mode)
+  "Sign a string PLAIN and return the output as string.
+If optional 3rd argument MODE is t or 'detached, it makes a detached signature.
+If it is nil or 'normal, it makes a normal signature.
+Otherwise, it makes a clear text signature."
+  (unwind-protect
+      (progn
+       (epg-context-set-output-file context
+                                    (epg--make-temp-file "epg-output"))
+       (epg-start-sign context (epg-make-data-from-string plain) mode)
+       (epg-wait-for-completion context)
+       (unless (epg-context-result-for context 'sign)
+         (if (epg-context-result-for context 'error)
+             (error "Sign failed: %S"
+                    (epg-context-result-for context 'error))
+           (error "Sign failed")))

        (epg-read-output context))
        (epg-read-output context))

+    (epg-delete-output-file context)

     (epg-reset context)))
 
 ;;;###autoload
     (epg-reset context)))
 
 ;;;###autoload

-(defun epg-start-encrypt (context string recipients
+(defun epg-start-encrypt (context plain recipients

                                  &optional sign always-trust)
                                  &optional sign always-trust)

-  "Initiate an encrypt operation on STRING.
+  "Initiate an encrypt operation on PLAIN.
+PLAIN is a data object.

 If RECIPIENTS is nil, it performs symmetric encryption.
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function
 If RECIPIENTS is nil, it performs symmetric encryption.
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function

-`epg-encrypt-string' instead."
+`epg-encrypt-file' or `epg-encrypt-string' instead."
+  (epg-context-set-operation context 'encrypt)

   (epg-context-set-result context nil)
   (epg-context-set-result context nil)

-  (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
-  (epg-start context
+  (epg--start context

             (append (if always-trust '("--always-trust"))
                     (if recipients '("--encrypt") '("--symmetric"))
                     (if sign
             (append (if always-trust '("--always-trust"))
                     (if recipients '("--encrypt") '("--symmetric"))
                     (if sign

@@ -787,82 +1774,391 @@ If you are unsure, use synchronous version of this function
                                                (list "-u" signer))
                                              (epg-context-signers context)))))
                     (apply #'nconc
                                                (list "-u" signer))
                                              (epg-context-signers context)))))
                     (apply #'nconc

-                           (mapcar (lambda (recipient)
-                                     (list "-r" recipient))
-                                   recipients))))
-  (if sign
-      (epg-wait-for-status context '("BEGIN_SIGNING"))
-    (if (null recipients)
-       (epg-wait-for-status context '("BEGIN_ENCRYPTION"))))
-  (if (eq (process-status (epg-context-process context)) 'run)
-      (process-send-string (epg-context-process context) string)))
+                           (mapcar
+                            (lambda (recipient)
+                              (list "-r"
+                                    (epg-sub-key-id
+                                     (car (epg-key-sub-key-list recipient)))))
+                            recipients))
+                    (if (epg-data-file plain)
+                        (list (epg-data-file plain)))))
+  ;; `gpgsm' does not read passphrase from stdin, so waiting is not needed.
+  (unless (eq (epg-context-protocol context) 'CMS)
+    (if sign
+       (epg-wait-for-status context '("BEGIN_SIGNING"))
+      (epg-wait-for-status context '("BEGIN_ENCRYPTION"))))
+  (when (epg-data-string plain)
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-string (epg-context-process context)
+                            (epg-data-string plain)))
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-eof (epg-context-process context)))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-encrypt-string (context string recipients
+(defun epg-encrypt-file (context plain recipients
+                                cipher &optional sign always-trust)
+  "Encrypt a file PLAIN and store the result to a file CIPHER.
+If CIPHER is nil, it returns the result as a string.
+If RECIPIENTS is nil, it performs symmetric encryption."
+  (unwind-protect
+      (progn
+       (if cipher
+           (epg-context-set-output-file context cipher)
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output")))
+       (epg-start-encrypt context (epg-make-data-from-file plain)
+                          recipients sign always-trust)
+       (epg-wait-for-completion context)
+       (if (and sign
+                (not (epg-context-result-for context 'sign)))
+           (if (epg-context-result-for context 'error)
+               (error "Sign failed: %S"
+                      (epg-context-result-for context 'error))
+               (error "Sign failed")))
+       (if (epg-context-result-for context 'error)
+           (error "Encrypt failed: %S"
+                  (epg-context-result-for context 'error)))
+       (unless cipher
+         (epg-read-output context)))
+    (unless cipher
+      (epg-delete-output-file context))
+    (epg-reset context)))
+
+;;;###autoload
+(defun epg-encrypt-string (context plain recipients

                                   &optional sign always-trust)
                                   &optional sign always-trust)

-  "Encrypt STRING.
+  "Encrypt a string PLAIN.

 If RECIPIENTS is nil, it performs symmetric encryption."
   (unwind-protect
       (progn
 If RECIPIENTS is nil, it performs symmetric encryption."
   (unwind-protect
       (progn

-       (epg-start-encrypt context string recipients sign always-trust)
+       (epg-context-set-output-file context
+                                    (epg--make-temp-file "epg-output"))
+       (epg-start-encrypt context (epg-make-data-from-string plain)
+                          recipients sign always-trust)

        (epg-wait-for-completion context)
        (epg-wait-for-completion context)

+       (if (and sign
+                (not (epg-context-result-for context 'sign)))
+           (if (epg-context-result-for context 'error)
+               (error "Sign failed: %S"
+                      (epg-context-result-for context 'error))
+             (error "Sign failed")))

        (if (epg-context-result-for context 'error)
        (if (epg-context-result-for context 'error)

-           (error "Encrypt failed"))
+           (error "Encrypt failed: %S"
+                  (epg-context-result-for context 'error)))

        (epg-read-output context))
        (epg-read-output context))

+    (epg-delete-output-file context)

     (epg-reset context)))
 
 ;;;###autoload
     (epg-reset context)))
 
 ;;;###autoload

-(defun epg-start-export-keys (context pattern)
+(defun epg-start-export-keys (context keys)

   "Initiate an export keys operation.
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function
   "Initiate an export keys operation.
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function

-`epg-export-keys' instead."
+`epg-export-keys-to-file' or `epg-export-keys-to-string' instead."
+  (epg-context-set-operation context 'export-keys)

   (epg-context-set-result context nil)
   (epg-context-set-result context nil)

-  (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
-  (epg-start context (list "--export" pattern)))
+  (epg--start context (cons "--export"
+                          (mapcar
+                           (lambda (key)
+                             (epg-sub-key-id
+                              (car (epg-key-sub-key-list key))))
+                           keys))))

 
 ;;;###autoload
 
 ;;;###autoload

-(defun epg-export-keys (context pattern)
-  "Extract public keys matched with PATTERN and return them."
+(defun epg-export-keys-to-file (context keys file)
+  "Extract public KEYS."

   (unwind-protect
       (progn
   (unwind-protect
       (progn

-       (epg-start-export-keys context pattern)
+       (if keys
+           (epg-context-set-output-file context file)
+         (epg-context-set-output-file context
+                                      (epg--make-temp-file "epg-output")))
+       (epg-start-export-keys context keys)

        (epg-wait-for-completion context)
        (if (epg-context-result-for context 'error)
        (epg-wait-for-completion context)
        (if (epg-context-result-for context 'error)

-           (error "Export keys failed"))
-       (epg-read-output context))
+           (error "Export keys failed: %S"
+                  (epg-context-result-for context 'error)))
+       (unless file
+         (epg-read-output context)))
+    (unless file
+      (epg-delete-output-file context))

     (epg-reset context)))
 
 ;;;###autoload
     (epg-reset context)))
 
 ;;;###autoload

+(defun epg-export-keys-to-string (context keys)
+  "Extract public KEYS and return them as a string."
+  (epg-export-keys-to-file context keys nil))
+
+;;;###autoload

 (defun epg-start-import-keys (context keys)
 (defun epg-start-import-keys (context keys)

-  "Initiate an import key operation.
+  "Initiate an import keys operation.
+KEYS is a data object.

 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function
 
 If you use this function, you will need to wait for the completion of
 `epg-gpg-program' by using `epg-wait-for-completion' and call
 `epg-reset' to clear a temporaly output file.
 If you are unsure, use synchronous version of this function

-`epg-import-keys' instead."
+`epg-import-keys-from-file' or `epg-import-keys-from-string' instead."
+  (epg-context-set-operation context 'import-keys)

   (epg-context-set-result context nil)
   (epg-context-set-result context nil)

-  (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
-  (epg-start context (list "--import"))
-  (if (eq (process-status (epg-context-process context)) 'run)
-      (process-send-string (epg-context-process context) keys)))
+  (epg--start context (if (epg-data-file keys)
+                         (list "--import" (epg-data-file keys))
+                       (list "--import")))
+  (when (epg-data-string keys)
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-string (epg-context-process context)
+                            (epg-data-string keys)))
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-eof (epg-context-process context)))))

 
 

-;;;###autoload
-(defun epg-import-keys (context keys)
-  "Add KEYS."
+(defun epg--import-keys-1 (context keys)

   (unwind-protect
       (progn
        (epg-start-import-keys context keys)
        (epg-wait-for-completion context)
        (if (epg-context-result-for context 'error)
   (unwind-protect
       (progn
        (epg-start-import-keys context keys)
        (epg-wait-for-completion context)
        (if (epg-context-result-for context 'error)

-           (error "Import keys failed"))
-       (epg-read-output context))
+           (error "Import keys failed: %S"
+                  (epg-context-result-for context 'error))))

     (epg-reset context)))
 
     (epg-reset context)))
 

+;;;###autoload
+(defun epg-import-keys-from-file (context keys)
+  "Add keys from a file KEYS."
+  (epg--import-keys-1 context (epg-make-data-from-file keys)))
+
+;;;###autoload
+(defun epg-import-keys-from-string (context keys)
+  "Add keys from a string KEYS."
+  (epg--import-keys-1 context (epg-make-data-from-string keys)))
+
+;;;###autoload
+(defun epg-start-receive-keys (context key-id-list)
+  "Initiate a receive key operation.
+KEY-ID-LIST is a list of key IDs.
+
+If you use this function, you will need to wait for the completion of
+`epg-gpg-program' by using `epg-wait-for-completion' and call
+`epg-reset' to clear a temporaly output file.
+If you are unsure, use synchronous version of this function
+`epg-generate-key-from-file' or `epg-generate-key-from-string' instead."
+  (epg-context-set-operation context 'receive-keys)
+  (epg-context-set-result context nil)
+  (epg--start context (cons "--recv-keys" key-id-list)))
+
+;;;###autoload
+(defun epg-receive-keys (context keys)
+  "Add keys from server.
+KEYS is a list of key IDs"
+  (unwind-protect
+      (progn
+       (epg-start-receive-keys context keys)
+       (epg-wait-for-completion context)
+       (if (epg-context-result-for context 'error)
+           (error "Receive keys failed: %S"
+                  (epg-context-result-for context 'error))))
+    (epg-reset context)))
+
+;;;###autoload
+(defalias 'epg-import-keys-from-server 'epg-receive-keys)
+
+;;;###autoload
+(defun epg-start-delete-keys (context keys &optional allow-secret)
+  "Initiate an delete keys operation.
+
+If you use this function, you will need to wait for the completion of
+`epg-gpg-program' by using `epg-wait-for-completion' and call
+`epg-reset' to clear a temporaly output file.
+If you are unsure, use synchronous version of this function
+`epg-delete-keys' instead."
+  (epg-context-set-operation context 'delete-keys)
+  (epg-context-set-result context nil)
+  (epg--start context (cons (if allow-secret
+                              "--delete-secret-key"
+                            "--delete-key")
+                          (mapcar
+                           (lambda (key)
+                             (epg-sub-key-id
+                              (car (epg-key-sub-key-list key))))
+                           keys))))
+
+;;;###autoload
+(defun epg-delete-keys (context keys &optional allow-secret)
+  "Delete KEYS from the key ring."
+  (unwind-protect
+      (progn
+       (epg-start-delete-keys context keys allow-secret)
+       (epg-wait-for-completion context)
+       (if (epg-context-result-for context 'error)
+           (error "Delete keys failed: %S"
+                  (epg-context-result-for context 'error))))
+    (epg-reset context)))
+
+;;;###autoload
+(defun epg-start-sign-keys (context keys &optional local)
+  "Initiate an sign keys operation.
+
+If you use this function, you will need to wait for the completion of
+`epg-gpg-program' by using `epg-wait-for-completion' and call
+`epg-reset' to clear a temporaly output file.
+If you are unsure, use synchronous version of this function
+`epg-sign-keys' instead."
+  (epg-context-set-operation context 'sign-keys)
+  (epg-context-set-result context nil)
+  (epg--start context (cons (if local
+                              "--lsign-key"
+                            "--sign-key")
+                          (mapcar
+                           (lambda (key)
+                             (epg-sub-key-id
+                              (car (epg-key-sub-key-list key))))
+                           keys))))
+
+;;;###autoload
+(defun epg-sign-keys (context keys &optional local)
+  "Sign KEYS from the key ring."
+  (unwind-protect
+      (progn
+       (epg-start-sign-keys context keys local)
+       (epg-wait-for-completion context)
+       (if (epg-context-result-for context 'error)
+           (error "Sign keys failed: %S"
+                  (epg-context-result-for context 'error))))
+    (epg-reset context)))
+
+;;;###autoload
+(defun epg-start-generate-key (context parameters)
+  "Initiate a key generation.
+PARAMETERS specifies parameters for the key.
+
+If you use this function, you will need to wait for the completion of
+`epg-gpg-program' by using `epg-wait-for-completion' and call
+`epg-reset' to clear a temporaly output file.
+If you are unsure, use synchronous version of this function
+`epg-generate-key-from-file' or `epg-generate-key-from-string' instead."
+  (epg-context-set-operation context 'generate-key)
+  (epg-context-set-result context nil)
+  (if (epg-data-file parameters)
+      (epg--start context (list "--batch" "--genkey"
+                              (epg-data-file parameters)))
+    (epg--start context '("--batch" "--genkey"))
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-string (epg-context-process context)
+                            (epg-data-string parameters)))
+    (if (eq (process-status (epg-context-process context)) 'run)
+       (process-send-eof (epg-context-process context)))))
+
+;;;###autoload
+(defun epg-generate-key-from-file (context parameters)
+  "Generate a new key pair.
+PARAMETERS is a file which tells how to create the key."
+  (unwind-protect
+      (progn
+       (epg-start-generate-key context (epg-make-data-from-file parameters))
+       (epg-wait-for-completion context)
+       (if (epg-context-result-for context 'error)
+           (error "Generate key failed: %S"
+                  (epg-context-result-for context 'error))))
+    (epg-reset context)))
+
+;;;###autoload
+(defun epg-generate-key-from-string (context parameters)
+  "Generate a new key pair.
+PARAMETERS is a string which tells how to create the key."
+  (unwind-protect
+      (progn
+       (epg-start-generate-key context (epg-make-data-from-string parameters))
+       (epg-wait-for-completion context)
+       (if (epg-context-result-for context 'error)
+           (error "Generate key failed: %S"
+                  (epg-context-result-for context 'error))))
+    (epg-reset context)))
+
+(defun epg--decode-hexstring (string)
+  (let ((index 0))
+    (while (eq index (string-match "[0-9A-Fa-f][0-9A-Fa-f]" string index))
+      (setq string (replace-match "\\x\\&" t nil string)
+           index (+ index 4)))
+    (car (read-from-string (concat "\"" string "\"")))))
+
+(defun epg--decode-quotedstring (string)
+  (let ((index 0))
+    (while (string-match "\\\\\\(\\([,=+<>#;\\\"]\\)\\|\
+\\([0-9A-Fa-f][0-9A-Fa-f]\\)\\|\\(.\\)\\)"
+                        string index)
+      (if (match-beginning 2)
+         (setq string (replace-match "\\2" t nil string)
+               index (1+ index))
+       (if (match-beginning 3)
+           (setq string (replace-match "\\x\\3" t nil string)
+                 index (+ index 4))
+         (setq string (replace-match "\\\\\\\\\\4" t nil string)
+               index (+ index 3)))))
+    (car (read-from-string (concat "\"" string "\"")))))
+
+(defun epg-dn-from-string (string)
+  "Parse STRING as LADPv3 Distinguished Names (RFC2253).
+The return value is an alist mapping from types to values."
+  (let ((index 0)
+       (length (length string))
+       alist type value group)
+    (while (< index length)
+      (if (eq index (string-match "[ \t\n\r]*" string index))
+         (setq index (match-end 0)))
+      (if (eq index (string-match
+                    "\\([0-9]+\\(\\.[0-9]+\\)*\\)\[ \t\n\r]*=[ \t\n\r]*"
+                    string index))
+         (setq type (match-string 1 string)
+               index (match-end 0))
+       (if (eq index (string-match "\\([0-9A-Za-z]+\\)[ \t\n\r]*=[ \t\n\r]*"
+                                   string index))
+           (setq type (match-string 1 string)
+                 index (match-end 0))))
+      (unless type
+       (error "Invalid type"))
+      (if (eq index (string-match
+                    "\\([^,=+<>#;\\\"]\\|\\\\.\\)+"
+                    string index))
+         (setq index (match-end 0)
+               value (epg--decode-quotedstring (match-string 0 string)))
+       (if (eq index (string-match "#\\([0-9A-Fa-f]+\\)" string index))
+           (setq index (match-end 0)
+                 value (epg--decode-hexstring (match-string 1 string)))
+         (if (eq index (string-match "\"\\([^\\\"]\\|\\\\.\\)*\""
+                                     string index))
+             (setq index (match-end 0)
+                   value (epg--decode-quotedstring
+                          (match-string 0 string))))))
+      (if group
+         (if (stringp (car (car alist)))
+             (setcar alist (list (cons type value) (car alist)))
+           (setcar alist (cons (cons type value) (car alist))))
+       (if (consp (car (car alist)))
+           (setcar alist (nreverse (car alist))))
+       (setq alist (cons (cons type value) alist)
+             type nil
+             value nil))
+      (if (eq index (string-match "[ \t\n\r]*\\([,;+]\\)" string index))
+         (setq index (match-end 0)
+               group (eq (aref string (match-beginning 1)) ?+))))
+    (nreverse alist)))
+
+(defun epg-decode-dn (alist)
+  "Convert ALIST returned by `epg-dn-from-string' to a human readable form.
+Type names are resolved using `epg-dn-type-alist'."
+  (mapconcat
+   (lambda (rdn)
+     (if (stringp (car rdn))
+        (let ((entry (assoc (car rdn) epg-dn-type-alist)))
+          (if entry
+              (format "%s=%s" (cdr entry) (cdr rdn))
+            (format "%s=%s" (car rdn) (cdr rdn))))
+       (concat "(" (epg-decode-dn rdn) ")")))
+   alist
+   ", "))
+

 (provide 'epg)
 
 ;;; epg.el ends here
 (provide 'epg)
 
 ;;; epg.el ends here