On Wed, Jan 31, 2007 at 01:27:23AM -0500, Victor Duchovni wrote:
Any feedback? Will the patch be considered? I imagine Sun is not the first
or last vendor to tinker with the algorithms they ship in libcrypto, and
that having robust behaviour in libssl when they do so is a worthwhile
goal. Making the "ALL:+RC4:@STRENGTH" cipherlist (anonymous ciphers
enabled for opportunistic encryption) work correctly with Postfix and Sun's
libcrypto-0.9.7 was a pain that I hope to spare myself and others in the
future if the proposed library change is adopted.
> *** openssl-SNAP-20070125/ssl/ssl_ciph.c Wed Jan 3 15:01:16 2007
> --- openssl-SNAP-20070125-new/ssl/ssl_ciph.c Wed Jan 31 01:05:06 2007
> ***************
> *** 478,486 ****
> *tail=curr;
> }
>
> ! static unsigned long ssl_cipher_get_disabled(void)
> {
> unsigned long mask = 0;
>
> #ifdef OPENSSL_NO_RSA
> mask |= SSL_aRSA|SSL_kRSA;
> --- 478,488 ----
> *tail=curr;
> }
>
> ! static unsigned long ssl_cipher_get_disabled(long *m256Ptr)
> {
> unsigned long mask = 0;
> + unsigned long m256;
> +
>
> #ifdef OPENSSL_NO_RSA
> mask |= SSL_aRSA|SSL_kRSA;
> ***************
> *** 512,529 ****
> mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
> mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
> mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
> - mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
> - mask |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ?
> SSL_CAMELLIA:0;
>
> mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
> mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
>
> return(mask);
> }
>
> static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
> ! int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list,
> ! CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
> {
> int i, co_list_num;
> SSL_CIPHER *c;
> --- 514,541 ----
> mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
> mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
> mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
>
> mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
> mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
>
> + /*
> + * So far so good, but for some ciphers mask and m256 differ
> + */
> + m256 = mask;
> +
> + mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
> + m256 |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES:0;
> + mask |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ?
> SSL_CAMELLIA:0;
> + m256 |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ?
> SSL_CAMELLIA:0;
> +
> + *m256Ptr = m256;
> return(mask);
> }
>
> static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
> ! int num_of_ciphers, unsigned long mask, unsigned long m256,
> ! CIPHER_ORDER *co_list, CIPHER_ORDER **head_p,
> ! CIPHER_ORDER **tail_p)
> {
> int i, co_list_num;
> SSL_CIPHER *c;
> ***************
> *** 541,547 ****
> {
> c = ssl_method->get_cipher(i);
> /* drop those that use any of that is not available */
> ! if ((c != NULL) && c->valid && !(c->algorithms & mask))
> {
> co_list[co_list_num].cipher = c;
> co_list[co_list_num].next = NULL;
> --- 553,560 ----
> {
> c = ssl_method->get_cipher(i);
> /* drop those that use any of that is not available */
> ! if ((c != NULL) && c->valid
> ! && !(c->algorithms & ((c->alg_bits == 256) ? m256 : mask)))
> {
> co_list[co_list_num].cipher = c;
> co_list[co_list_num].next = NULL;
> ***************
> *** 982,987 ****
> --- 995,1001 ----
> {
> int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
> unsigned long disabled_mask;
> + unsigned long disabled_m256;
> STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
> const char *rule_p;
> CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
> ***************
> *** 997,1003 ****
> * To reduce the work to do we only want to process the compiled
> * in algorithms, so we first get the mask of disabled ciphers.
> */
> ! disabled_mask = ssl_cipher_get_disabled();
>
> /*
> * Now we have to collect the available ciphers from the compiled
> --- 1011,1017 ----
> * To reduce the work to do we only want to process the compiled
> * in algorithms, so we first get the mask of disabled ciphers.
> */
> ! disabled_mask = ssl_cipher_get_disabled(&disabled_m256);
>
> /*
> * Now we have to collect the available ciphers from the compiled
> ***************
> *** 1016,1022 ****
> }
>
> ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
> ! co_list, &head, &tail);
>
> /*
> * We also need cipher aliases for selecting based on the rule_str.
> --- 1030,1036 ----
> }
>
> ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
> ! disabled_m256, co_list, &head, &tail);
>
> /*
> * We also need cipher aliases for selecting based on the rule_str.
> ***************
> *** 1036,1043 ****
> SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
> return(NULL); /* Failure */
> }
> ! ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
> ! head);
>
> /*
> * If the rule_string begins with DEFAULT, apply the default rule
> --- 1050,1057 ----
> SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
> return(NULL); /* Failure */
> }
> ! ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
> ! (disabled_mask & disabled_m256), head);
>
> /*
> * If the rule_string begins with DEFAULT, apply the default rule
--
Viktor.
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