1 files changed, 23 insertions, 41 deletions

diff --git a/src/lib/libssl/ssl_ciph.c b/src/lib/libssl/ssl_ciph.c
index b68ed81e52..3df5e2fa80 100644
--- a/src/lib/libssl/ssl_ciph.c
+++ b/src/lib/libssl/ssl_ciph.c
@@ -700,9 +700,18 @@ static int ssl_cipher_process_rulestr(const char *rule_str,
                         if (!found)
                                 break;  /* ignore this entry */
 
-                        algorithms |= ca_list[j]->algorithms;
+                        /* New algorithms:
+                         *  1 - any old restrictions apply outside new mask
+                         *  2 - any new restrictions apply outside old mask
+                         *  3 - enforce old & new where masks intersect
+                         */
+                        algorithms = (algorithms & ~ca_list[j]->mask) |         /* 1 */
+                                     (ca_list[j]->algorithms & ~mask) |         /* 2 */
+                                     (algorithms & ca_list[j]->algorithms);     /* 3 */
                         mask |= ca_list[j]->mask;
-                        algo_strength |= ca_list[j]->algo_strength;
+                        algo_strength = (algo_strength & ~ca_list[j]->mask_strength) |
+                                        (ca_list[j]->algo_strength & ~mask_strength) |
+                                        (algo_strength & ca_list[j]->algo_strength);
                         mask_strength |= ca_list[j]->mask_strength;
 
                         if (!multi) break;
@@ -756,7 +765,7 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
         {
         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
         unsigned long disabled_mask;
-        STACK_OF(SSL_CIPHER) *cipherstack;
+        STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
         const char *rule_p;
         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
         SSL_CIPHER **ca_list = NULL;
@@ -764,7 +773,8 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
         /*
          * Return with error if nothing to do.
          */
-        if (rule_str == NULL) return(NULL);
+        if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
+                return NULL;
 
         if (init_ciphers)
                 {
@@ -875,46 +885,18 @@ STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
                 }
         OPENSSL_free(co_list);  /* Not needed any longer */
 
-        /*
-         * The following passage is a little bit odd. If pointer variables
-         * were supplied to hold STACK_OF(SSL_CIPHER) return information,
-         * the old memory pointed to is free()ed. Then, however, the
-         * cipher_list entry will be assigned just a copy of the returned
-         * cipher stack. For cipher_list_by_id a copy of the cipher stack
-         * will be created. See next comment...
-         */
-        if (cipher_list != NULL)
-                {
-                if (*cipher_list != NULL)
-                        sk_SSL_CIPHER_free(*cipher_list);
-                *cipher_list = cipherstack;
-                }
-
-        if (cipher_list_by_id != NULL)
-                {
-                if (*cipher_list_by_id != NULL)
-                        sk_SSL_CIPHER_free(*cipher_list_by_id);
-                *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
-                }
-
-        /*
-         * Now it is getting really strange. If something failed during
-         * the previous pointer assignment or if one of the pointers was
-         * not requested, the error condition is met. That might be
-         * discussable. The strange thing is however that in this case
-         * the memory "ret" pointed to is "free()ed" and hence the pointer
-         * cipher_list becomes wild. The memory reserved for
-         * cipher_list_by_id however is not "free()ed" and stays intact.
-         */
-        if (    (cipher_list_by_id == NULL) ||
-                (*cipher_list_by_id == NULL) ||
-                (cipher_list == NULL) ||
-                (*cipher_list == NULL))
+        tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
+        if (tmp_cipher_list == NULL)
                 {
                 sk_SSL_CIPHER_free(cipherstack);
-                return(NULL);
+                return NULL;
                 }
-
+        if (*cipher_list != NULL)
+                sk_SSL_CIPHER_free(*cipher_list);
+        *cipher_list = cipherstack;
+        if (*cipher_list_by_id != NULL)
+                sk_SSL_CIPHER_free(*cipher_list_by_id);
+        *cipher_list_by_id = tmp_cipher_list;
         sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
 
         return(cipherstack);