+(defun mm-find-part-by-type (handles type &optional notp recursive)
+ "Search in HANDLES for part with TYPE.
+If NOTP, returns first non-matching part.
+If RECURSIVE, search recursively."
+ (let (handle)
+ (while handles
+ (if (and recursive (stringp (caar handles)))
+ (if (setq handle (mm-find-part-by-type (cdar handles) type
+ notp recursive))
+ (setq handles nil))
+ (if (if notp
+ (not (equal (mm-handle-media-type (car handles)) type))
+ (equal (mm-handle-media-type (car handles)) type))
+ (setq handle (car handles)
+ handles nil)))
+ (setq handles (cdr handles)))
+ handle))
+
+(defun mm-find-raw-part-by-type (ctl type &optional notp)
+ (goto-char (point-min))
+ (let* ((boundary (concat "--" (mm-handle-multipart-ctl-parameter ctl
+ 'boundary)))
+ (close-delimiter (concat "^" (regexp-quote boundary) "--[ \t]*$"))
+ start
+ (end (save-excursion
+ (goto-char (point-max))
+ (if (re-search-backward close-delimiter nil t)
+ (match-beginning 0)
+ (point-max))))
+ result)
+ (setq boundary (concat "^" (regexp-quote boundary) "[ \t]*$"))
+ (while (and (not result)
+ (re-search-forward boundary end t))
+ (goto-char (match-beginning 0))
+ (when start
+ (save-excursion
+ (save-restriction
+ (narrow-to-region start (1- (point)))
+ (when (let ((ctl (ignore-errors
+ (mail-header-parse-content-type
+ (mail-fetch-field "content-type")))))
+ (if notp
+ (not (equal (car ctl) type))
+ (equal (car ctl) type)))
+ (setq result (buffer-string))))))
+ (forward-line 1)
+ (setq start (point)))
+ (when (and (not result) start)
+ (save-excursion
+ (save-restriction
+ (narrow-to-region start end)
+ (when (let ((ctl (ignore-errors
+ (mail-header-parse-content-type
+ (mail-fetch-field "content-type")))))
+ (if notp
+ (not (equal (car ctl) type))
+ (equal (car ctl) type)))
+ (setq result (buffer-string))))))
+ result))
+
+(defvar mm-security-handle nil)
+
+(defsubst mm-set-handle-multipart-parameter (handle parameter value)
+ ;; HANDLE could be a CTL.
+ (when handle
+ (put-text-property 0 (length (car handle)) parameter value
+ (car handle))))
+
+(defun mm-possibly-verify-or-decrypt (parts ctl)
+ (let ((type (car ctl))
+ (subtype (cadr (split-string (car ctl) "/")))
+ (mm-security-handle ctl) ;; (car CTL) is the type.
+ protocol func functest)
+ (cond
+ ((or (equal type "application/x-pkcs7-mime")
+ (equal type "application/pkcs7-mime"))
+ (with-temp-buffer
+ (when (and (cond
+ ((eq mm-decrypt-option 'never) nil)
+ ((eq mm-decrypt-option 'always) t)
+ ((eq mm-decrypt-option 'known) t)
+ (t (y-or-n-p
+ (format "Decrypt (S/MIME) part? "))))
+ (mm-view-pkcs7 parts))
+ (setq parts (mm-dissect-buffer t)))))
+ ((equal subtype "signed")
+ (unless (and (setq protocol
+ (mm-handle-multipart-ctl-parameter ctl 'protocol))
+ (not (equal protocol "multipart/mixed")))
+ ;; The message is broken or draft-ietf-openpgp-multsig-01.
+ (let ((protocols mm-verify-function-alist))
+ (while protocols
+ (if (and (or (not (setq functest (nth 3 (car protocols))))
+ (funcall functest parts ctl))
+ (mm-find-part-by-type parts (caar protocols) nil t))
+ (setq protocol (caar protocols)
+ protocols nil)
+ (setq protocols (cdr protocols))))))
+ (setq func (nth 1 (assoc protocol mm-verify-function-alist)))
+ (when (cond
+ ((eq mm-verify-option 'never) nil)
+ ((eq mm-verify-option 'always) t)
+ ((eq mm-verify-option 'known)
+ (and func
+ (or (not (setq functest
+ (nth 3 (assoc protocol
+ mm-verify-function-alist))))
+ (funcall functest parts ctl))))
+ (t
+ (y-or-n-p
+ (format "Verify signed (%s) part? "
+ (or (nth 2 (assoc protocol mm-verify-function-alist))
+ (format "protocol=%s" protocol))))))
+ (save-excursion
+ (if func
+ (funcall func parts ctl)
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details
+ (format "Unknown sign protocol (%s)" protocol))))))
+ ((equal subtype "encrypted")
+ (unless (setq protocol
+ (mm-handle-multipart-ctl-parameter ctl 'protocol))
+ ;; The message is broken.
+ (let ((parts parts))
+ (while parts
+ (if (assoc (mm-handle-media-type (car parts))
+ mm-decrypt-function-alist)
+ (setq protocol (mm-handle-media-type (car parts))
+ parts nil)
+ (setq parts (cdr parts))))))
+ (setq func (nth 1 (assoc protocol mm-decrypt-function-alist)))
+ (when (cond
+ ((eq mm-decrypt-option 'never) nil)
+ ((eq mm-decrypt-option 'always) t)
+ ((eq mm-decrypt-option 'known)
+ (and func
+ (or (not (setq functest
+ (nth 3 (assoc protocol
+ mm-decrypt-function-alist))))
+ (funcall functest parts ctl))))
+ (t
+ (y-or-n-p
+ (format "Decrypt (%s) part? "
+ (or (nth 2 (assoc protocol mm-decrypt-function-alist))
+ (format "protocol=%s" protocol))))))
+ (save-excursion
+ (if func
+ (setq parts (funcall func parts ctl))
+ (mm-set-handle-multipart-parameter
+ mm-security-handle 'gnus-details
+ (format "Unknown encrypt protocol (%s)" protocol))))))
+ (t nil))
+ parts))
+
+(defun mm-multiple-handles (handles)
+ (and (listp handles)
+ (> (length handles) 1)
+ (or (listp (car handles))
+ (stringp (car handles)))))
+
+(defun mm-complicated-handles (handles)
+ (and (listp (car handles))
+ (> (length handles) 1)))
+
+(defun mm-merge-handles (handles1 handles2)
+ (append
+ (if (listp (car handles1))
+ handles1
+ (list handles1))
+ (if (listp (car handles2))
+ handles2
+ (list handles2))))
+
+(defun mm-readable-p (handle)
+ "Say whether the content of HANDLE is readable."
+ (and (< (with-current-buffer (mm-handle-buffer handle)
+ (buffer-size)) 10000)
+ (mm-with-unibyte-buffer
+ (mm-insert-part handle)
+ (and (eq (mm-body-7-or-8) '7bit)
+ (not (mm-long-lines-p 76))))))
+
projects / elisp / gnus.git- / blobdiff