changeset: 6969:23c00b71f653
user:      Kevin McCarthy <ke...@8t8.us>
date:      Mon Mar 13 18:38:23 2017 -0700
link:      http://dev.mutt.org/hg/mutt/rev/23c00b71f653

Change OpenSSL to use SHA-256 for cert comparison. (closes #3924)

Note the GnuTLS code compares the certs directly to check if they are
in the certfile.

diffs (39 lines):

diff -r 00cef7557f38 -r 23c00b71f653 mutt_ssl.c
--- a/mutt_ssl.c        Mon Mar 13 01:38:44 2017 +0100
+++ b/mutt_ssl.c        Mon Mar 13 18:38:23 2017 -0700
@@ -771,7 +771,7 @@
       X509_issuer_name_cmp (cert, peercert) != 0)
     return -1;
 
-  if (!X509_digest (cert, EVP_sha1(), md, &mdlen) || peermdlen != mdlen)
+  if (!X509_digest (cert, EVP_sha256(), md, &mdlen) || peermdlen != mdlen)
     return -1;
 
   if (memcmp(peermd, md, mdlen) != 0)
@@ -787,7 +787,7 @@
   X509 *cert;
   int i;
 
-  if (!X509_digest (peercert, EVP_sha1(), peermd, &peermdlen)
+  if (!X509_digest (peercert, EVP_sha256(), peermd, &peermdlen)
       || !SslSessionCerts)
   {
     return 0;
@@ -848,7 +848,7 @@
   if ((fp = fopen (SslCertFile, "rt")) == NULL)
     return 0;
 
-  if (!X509_digest (peercert, EVP_sha1(), peermd, &peermdlen))
+  if (!X509_digest (peercert, EVP_sha256(), peermd, &peermdlen))
   {
     safe_fclose (&fp);
     return 0;
@@ -1083,7 +1083,7 @@
   {
     if (skip_mode && preverify_ok && (pos == last_pos) && last_cert)
     {
-      if (X509_digest (last_cert, EVP_sha1(), last_cert_md, &last_cert_mdlen) 
&&
+      if (X509_digest (last_cert, EVP_sha256(), last_cert_md, 
&last_cert_mdlen) &&
           !compare_certificates (cert, last_cert, last_cert_md, 
last_cert_mdlen))
       {
         dprint (2, (debugfile,

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