mod_ssl: Fixes PR 62880 where certificate loading fails bc SSL ERRs are

not cleared beforehand.
+1: icing, jim, minfrin


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1847280 13f79535-47bb-0310-9956-ffa450edef68

CHANGES

@@ -1,6 +1,10 @@
                                                          -*- coding: utf-8 -*-
 Changes with Apache 2.4.38
 
+  *) mod_ssl: clear *SSL errors before loading certificates and checking
+     afterwards. Otherwise errors are reported when other SSL using modules
+     are in play. Fixes PR 62880. [Michael Kaufmann]
+
   *) mod_ssl: Fix the error code returned in an error path of
      'ssl_io_filter_handshake()'. This messes-up error handling performed
      in 'ssl_io_filter_error()' [Yann Ylavic]

STATUS

@@ -126,12 +126,6 @@ RELEASE SHOWSTOPPERS:
 PATCHES ACCEPTED TO BACKPORT FROM TRUNK:
   [ start all new proposals below, under PATCHES PROPOSED. ]
 
-  *) mod_ssl: Fixes PR 62880 where certificate loading fails bc SSL ERRs are
-              not cleared beforehand.
-     trunk patch: http://svn.apache.org/r1845768
-     2.4.x patch: svn merge -c 1845768 ^/httpd/httpd/trunk .
-     +1: icing, jim, minfrin
-
 
 PATCHES PROPOSED TO BACKPORT FROM TRUNK:
   [ New proposals should be added at the end of the list ]

modules/ssl/ssl_engine_init.c

@@ -1038,8 +1038,10 @@ static int use_certificate_chain(
         ctx->extra_certs = NULL;
     }
 #endif
+
     /* create new extra chain by loading the certs */
     n = 0;
+    ERR_clear_error();
     while ((x509 = PEM_read_bio_X509(bio, NULL, cb, NULL)) != NULL) {
         if (!SSL_CTX_add_extra_chain_cert(ctx, x509)) {
             X509_free(x509);

modules/ssl/ssl_util_ocsp.c

@@ -363,7 +363,9 @@ static STACK_OF(X509) *modssl_read_ocsp_certificates(const char *file)
         BIO_free(bio);
         return NULL;
     }
+
     /* create new extra chain by loading the certs */
+    ERR_clear_error();
     while ((x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL)) != NULL) {
         if (!other_certs) {
                 other_certs = sk_X509_new_null();