From bf351aa129cd4460fb2fd9cb9c4029a38a1f6e8d Mon Sep 17 00:00:00 2001
From: ueno <ueno>
Date: Wed, 12 Apr 2006 05:46:45 +0000
Subject: [PATCH] Barf if cryptographic operation has failed.

---
 epg.el |   55 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 47 insertions(+), 8 deletions(-)

diff --git a/epg.el b/epg.el
index cd5ecb6..60af26d 100644
--- a/epg.el
+++ b/epg.el
@@ -276,7 +276,8 @@ This function is for internal use only."
       (accept-process-output (epg-context-process context) 1))))
 
 (defun epg-wait-for-completion (context)
-  (process-send-eof (epg-context-process context))
+  (if (eq (process-status (epg-context-process context)) 'run)
+      (process-send-eof (epg-context-process context)))
   (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.
@@ -378,7 +379,7 @@ This function is for internal use only."
 	     (epg-context-result-for epg-context 'verify)))))
 
 (defun epg-status-TRUST_UNDEFINED (process string)
-  (let ((signature (car (epg-context-result-for-for epg-context 'verify))))
+  (let ((signature (car (epg-context-result-for epg-context 'verify))))
     (if (and signature
 	     (eq (epg-signature-status signature) 'good))
 	(epg-signature-set-validity signature 'unknown))))
@@ -407,9 +408,6 @@ This function is for internal use only."
 	     (eq (epg-signature-status signature) 'good))
 	(epg-signature-set-validity signature 'full))))
 
-(defun epg-status-DECRYPTION_FAILED (process string)
-  (epg-context-set-result-for epg-context 'decrypt 'failed))
-
 (defun epg-status-PROGRESS (process string)
   (if (string-match "\\`\\([^ ]+\\) \\([^ ]\\) \\([0-9]+\\) \\([0-9]+\\)"
 		    string)
@@ -420,6 +418,42 @@ This function is for internal use only."
 	       (string-to-number (match-string 4 string))
 	       (cdr (epg-context-progress-callback-info epg-context)))))
 
+(defun epg-status-DECRYPTION_FAILED (process string)
+  (epg-context-set-result-for
+   epg-context 'error
+   (cons 'decryption-failed
+	 (epg-context-result-for epg-context 'error))))
+
+(defun epg-status-NODATA (process string)
+  (epg-context-set-result-for
+   epg-context 'error
+   (cons (cons 'no-data (string-to-number string))
+	 (epg-context-result-for epg-context 'error))))
+
+(defun epg-status-UNEXPECTED (process string)
+  (epg-context-set-result-for
+   epg-context 'error
+   (cons (cons 'unexpected (string-to-number string))
+	 (epg-context-result-for epg-context 'error))))
+
+(defun epg-status-KEYEXPIRED (process string)
+  (epg-context-set-result-for
+   epg-context 'error
+   (cons (cons 'key-expired string)
+	 (epg-context-result-for epg-context 'error))))
+
+(defun epg-status-KEYREVOKED (process string)
+  (epg-context-set-result-for
+   epg-context 'error
+   (cons 'key-revoked
+	 (epg-context-result-for epg-context 'error))))
+
+(defun epg-status-BADARMOR (process string)
+  (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)
@@ -511,8 +545,9 @@ If you are unsure, use synchronous version of this function
       (progn
 	(epg-decrypt-start context input-file)
 	(epg-wait-for-completion context)
-	(unless (epg-context-result-for context 'decrypt)
-	  (epg-read-output context)))
+	(if (epg-context-result-for context 'error)
+	    (error "Decryption failed"))
+	(epg-read-output context))
     (epg-reset context)
     (if (file-exists-p input-file)
 	(delete-file input-file))))
@@ -589,7 +624,7 @@ If you are unsure, use synchronous version of this function
 `epg-sign-string' instead."
   (epg-context-set-output-file context (epg-make-temp-file "epg-output"))
   (epg-start context
-	     (append (list (if (eq 'clearsign)
+	     (append (list (if (eq mode 'clearsign)
 			       "--clearsign"
 			     (if (or (eq mode t) (eq mode 'detached))
 				 "--detach-sign"
@@ -612,6 +647,8 @@ Otherwise, it makes a normal signature."
       (progn
 	(epg-sign-start context string mode)
 	(epg-wait-for-completion context)
+	(if (epg-context-result-for context 'error)
+	    (error "Sign failed"))
 	(epg-read-output context))
     (epg-reset context)))
 
@@ -656,6 +693,8 @@ If RECIPIENTS is nil, it performs symmetric encryption."
       (progn
 	(epg-encrypt-start context string recipients sign always-trust)
 	(epg-wait-for-completion context)
+	(if (epg-context-result-for context 'error)
+	    (error "Encrypt failed"))
 	(epg-read-output context))
     (epg-reset context)))
 
-- 
1.7.10.4