From e1157d2698cd6f25e986cbe3563912726faf2471 Mon Sep 17 00:00:00 2001
From: yamaoka <yamaoka>
Date: Mon, 5 Apr 1999 07:19:22 +0000
Subject: [PATCH] * (mime-pgp-detect-version): New function.
 (mime-verify-application/pgp-signature): Use it.
 (mime-decrypt-application/pgp-encrypted): Use it.
 (TopLevel): Require `std11'.

---
 ChangeLog   |    5 +++++
 mime-pgp.el |   22 +++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 5d29df8..dd858cb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 1999-04-05  Katsumi Yamaoka   <yamaoka@jpl.org>
 
+	* mime-pgp.el (mime-pgp-detect-version): New function.
+	(mime-verify-application/pgp-signature): Use it.
+	(mime-decrypt-application/pgp-encrypted): Use it.
+	(TopLevel): Require `std11'.
+
 	* mime-mc.el (mime-mc-gpg-sign-region): Remove ("--passphrase-fd"
 	"0") from the list of arguments.
 	(mime-mc-shell-file-name): New user option.
diff --git a/mime-pgp.el b/mime-pgp.el
index 88ffcb3..c9a2637 100644
--- a/mime-pgp.el
+++ b/mime-pgp.el
@@ -44,6 +44,7 @@
 
 ;;; Code:
 
+(require 'std11)
 (require 'semi-def)
 (require 'mime-play)
 
@@ -112,6 +113,23 @@
     (set-window-buffer p-win mime-preview-buffer)
     ))
 
+(defun mime-pgp-detect-version (entity)
+  "Detect PGP version from detached signature."
+  (with-temp-buffer
+    (mime-insert-entity-content entity)
+    (std11-narrow-to-header)
+    (let ((version (std11-fetch-field "Version")))
+      (cond ((not version)
+	     pgp-version)
+	    ((string-match "GnuPG" version)
+	     'gpg)
+	    ((string-match "5\\.0i" version)
+	     'pgp50)
+	    ((string-match "2\\.6" version)
+	     'pgp)
+	    (t
+	     pgp-version)))))
+
 
 ;;; @ Internal method for application/pgp-signature
 ;;;
@@ -327,6 +345,7 @@ or \"v\" for choosing a command of PGP 5.0i."
 	 (basename (expand-file-name "tm" temporary-file-directory))
 	 (orig-file (make-temp-name basename))
 	 (sig-file (concat orig-file ".sig"))
+	 (pgp-version (mime-pgp-detect-version entity))
 	 )
     (mime-write-entity orig-entity orig-file)
     (save-excursion (mime-show-echo-buffer))
@@ -397,7 +416,8 @@ or \"v\" for choosing a command of PGP 5.0i."
 	 (onum (if (> knum 0)
 		   (1- knum)
 		 (1+ knum)))
-	 (orig-entity (nth onum (mime-entity-children mother))))
+	 (orig-entity (nth onum (mime-entity-children mother)))
+	 (pgp-version (mime-pgp-detect-version orig-entity)))
     (mime-view-application/pgp orig-entity situation)
     ))
 
-- 
1.7.10.4