Add nnir-1.68.

[elisp/gnus.git-] / lisp / mm-view.el

diff --git a/lisp/mm-view.el b/lisp/mm-view.el
index 524b815..82f116c 100644 (file)
--- a/lisp/mm-view.el
+++ b/lisp/mm-view.el
@@ -34,7 +34,8 @@
   (autoload 'vcard-parse-string "vcard")
   (autoload 'vcard-format-string "vcard")
   (autoload 'fill-flowed "flow-fill")
-  (autoload 'diff-mode "diff-mode"))
+  (unless (fboundp 'diff-mode)
+    (autoload 'diff-mode "diff-mode" "" t nil)))
 
 ;;;
 ;;; Functions for displaying various formats inline
@@ -163,11 +164,12 @@
       (mm-insert-inline
        handle
        (concat "\n-- \n"
-              (if (fboundp 'vcard-pretty-print)
-                  (vcard-pretty-print (mm-get-part handle))
-                (vcard-format-string
-                 (vcard-parse-string (mm-get-part handle)
-                                     'vcard-standard-filter))))))
+              (ignore-errors
+                (if (fboundp 'vcard-pretty-print)
+                    (vcard-pretty-print (mm-get-part handle))
+                  (vcard-format-string
+                   (vcard-parse-string (mm-get-part handle)
+                                       'vcard-standard-filter)))))))
      (t
       (let ((b (point))
            (charset (mail-content-type-get
@@ -319,6 +321,58 @@
 (defun mm-display-elisp-inline (handle)
   (mm-display-inline-fontify handle 'emacs-lisp-mode))
 
+;;      id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
+;;          us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 }
+(defvar mm-pkcs7-signed-magic
+  (mm-string-as-unibyte
+   (apply 'concat
+         (mapcar 'char-to-string
+                 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
+                       ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
+                       ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
+                       ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x02)))))
+
+;;      id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2)
+;;          us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 }
+(defvar mm-pkcs7-enveloped-magic
+  (mm-string-as-unibyte
+   (apply 'concat
+         (mapcar 'char-to-string
+                 (list ?\x30 ?\x5c ?\x28 ?\x80 ?\x5c ?\x7c ?\x81 ?\x2e ?\x5c
+                       ?\x7c ?\x82 ?\x2e ?\x2e ?\x5c ?\x7c ?\x83 ?\x2e ?\x2e
+                       ?\x2e ?\x5c ?\x29 ?\x06 ?\x09 ?\x5c ?\x2a ?\x86 ?\x48
+                       ?\x86 ?\xf7 ?\x0d ?\x01 ?\x07 ?\x03)))))
+
+(defun mm-view-pkcs7-get-type (handle)
+  (mm-with-unibyte-buffer
+   (mm-insert-part handle)
+   (cond ((looking-at mm-pkcs7-enveloped-magic)
+         'enveloped)
+        ((looking-at mm-pkcs7-signed-magic)
+         'signed)
+        (t
+         (error "Could not identify PKCS#7 type")))))
+
+(defun mm-view-pkcs7 (handle)
+  (case (mm-view-pkcs7-get-type handle)
+    (enveloped (mm-view-pkcs7-decrypt handle))
+    (otherwise (error "Unknown or unimplemented PKCS#7 type"))))
+
+(defun mm-view-pkcs7-decrypt (handle)
+  (insert-buffer (mm-handle-buffer handle))
+  (goto-char (point-min))
+  (insert "MIME-Version: 1.0\n")
+  (mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
+  (smime-decrypt-region
+   (point-min) (point-max)
+   (if (= (length smime-keys) 1)
+       (cadar smime-keys)
+     (smime-get-key-by-email
+      (completing-read "Decrypt this part with which key? "
+                      smime-keys nil nil
+                      (and (listp (car-safe smime-keys))
+                           (caar smime-keys)))))))
+
 (provide 'mm-view)
 
 ;;; mm-view.el ends here