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/* $OpenBSD: ssl_ciph.c,v 1.142 2024/05/09 07:55:48 tb Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECC cipher suite support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
/* ====================================================================
* Copyright 2005 Nokia. All rights reserved.
*
* The portions of the attached software ("Contribution") is developed by
* Nokia Corporation and is licensed pursuant to the OpenSSL open source
* license.
*
* The Contribution, originally written by Mika Kousa and Pasi Eronen of
* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
* support (see RFC 4279) to OpenSSL.
*
* No patent licenses or other rights except those expressly stated in
* the OpenSSL open source license shall be deemed granted or received
* expressly, by implication, estoppel, or otherwise.
*
* No assurances are provided by Nokia that the Contribution does not
* infringe the patent or other intellectual property rights of any third
* party or that the license provides you with all the necessary rights
* to make use of the Contribution.
*
* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
* OTHERWISE.
*/
#include <stdio.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/opensslconf.h>
#include "ssl_local.h"
#define CIPHER_ADD 1
#define CIPHER_KILL 2
#define CIPHER_DEL 3
#define CIPHER_ORD 4
#define CIPHER_SPECIAL 5
typedef struct cipher_order_st {
const SSL_CIPHER *cipher;
int active;
int dead;
struct cipher_order_st *next, *prev;
} CIPHER_ORDER;
static const SSL_CIPHER cipher_aliases[] = {
/* "ALL" doesn't include eNULL (must be specifically enabled) */
{
.name = SSL_TXT_ALL,
.algorithm_enc = ~SSL_eNULL,
},
/* "COMPLEMENTOFALL" */
{
.name = SSL_TXT_CMPALL,
.algorithm_enc = SSL_eNULL,
},
/*
* "COMPLEMENTOFDEFAULT"
* (does *not* include ciphersuites not found in ALL!)
*/
{
.name = SSL_TXT_CMPDEF,
.algorithm_mkey = SSL_kDHE|SSL_kECDHE,
.algorithm_auth = SSL_aNULL,
.algorithm_enc = ~SSL_eNULL,
},
/*
* key exchange aliases
* (some of those using only a single bit here combine multiple key
* exchange algs according to the RFCs, e.g. kEDH combines DHE_DSS
* and DHE_RSA)
*/
{
.name = SSL_TXT_kRSA,
.algorithm_mkey = SSL_kRSA,
},
{
.name = SSL_TXT_kEDH,
.algorithm_mkey = SSL_kDHE,
},
{
.name = SSL_TXT_DH,
.algorithm_mkey = SSL_kDHE,
},
{
.name = SSL_TXT_kEECDH,
.algorithm_mkey = SSL_kECDHE,
},
{
.name = SSL_TXT_ECDH,
.algorithm_mkey = SSL_kECDHE,
},
/* server authentication aliases */
{
.name = SSL_TXT_aRSA,
.algorithm_auth = SSL_aRSA,
},
{
.name = SSL_TXT_aDSS,
.algorithm_auth = SSL_aDSS,
},
{
.name = SSL_TXT_DSS,
.algorithm_auth = SSL_aDSS,
},
{
.name = SSL_TXT_aNULL,
.algorithm_auth = SSL_aNULL,
},
{
.name = SSL_TXT_aECDSA,
.algorithm_auth = SSL_aECDSA,
},
{
.name = SSL_TXT_ECDSA,
.algorithm_auth = SSL_aECDSA,
},
/* aliases combining key exchange and server authentication */
{
.name = SSL_TXT_DHE,
.algorithm_mkey = SSL_kDHE,
.algorithm_auth = ~SSL_aNULL,
},
{
.name = SSL_TXT_EDH,
.algorithm_mkey = SSL_kDHE,
.algorithm_auth = ~SSL_aNULL,
},
{
.name = SSL_TXT_ECDHE,
.algorithm_mkey = SSL_kECDHE,
.algorithm_auth = ~SSL_aNULL,
},
{
.name = SSL_TXT_EECDH,
.algorithm_mkey = SSL_kECDHE,
.algorithm_auth = ~SSL_aNULL,
},
{
.name = SSL_TXT_NULL,
.algorithm_enc = SSL_eNULL,
},
{
.name = SSL_TXT_RSA,
.algorithm_mkey = SSL_kRSA,
.algorithm_auth = SSL_aRSA,
},
{
.name = SSL_TXT_ADH,
.algorithm_mkey = SSL_kDHE,
.algorithm_auth = SSL_aNULL,
},
{
.name = SSL_TXT_AECDH,
.algorithm_mkey = SSL_kECDHE,
.algorithm_auth = SSL_aNULL,
},
/* symmetric encryption aliases */
{
.name = SSL_TXT_3DES,
.algorithm_enc = SSL_3DES,
},
{
.name = SSL_TXT_RC4,
.algorithm_enc = SSL_RC4,
},
{
.name = SSL_TXT_eNULL,
.algorithm_enc = SSL_eNULL,
},
{
.name = SSL_TXT_AES128,
.algorithm_enc = SSL_AES128|SSL_AES128GCM,
},
{
.name = SSL_TXT_AES256,
.algorithm_enc = SSL_AES256|SSL_AES256GCM,
},
{
.name = SSL_TXT_AES,
.algorithm_enc = SSL_AES,
},
{
.name = SSL_TXT_AES_GCM,
.algorithm_enc = SSL_AES128GCM|SSL_AES256GCM,
},
{
.name = SSL_TXT_CAMELLIA128,
.algorithm_enc = SSL_CAMELLIA128,
},
{
.name = SSL_TXT_CAMELLIA256,
.algorithm_enc = SSL_CAMELLIA256,
},
{
.name = SSL_TXT_CAMELLIA,
.algorithm_enc = SSL_CAMELLIA128|SSL_CAMELLIA256,
},
{
.name = SSL_TXT_CHACHA20,
.algorithm_enc = SSL_CHACHA20POLY1305,
},
/* MAC aliases */
{
.name = SSL_TXT_AEAD,
.algorithm_mac = SSL_AEAD,
},
{
.name = SSL_TXT_MD5,
.algorithm_mac = SSL_MD5,
},
{
.name = SSL_TXT_SHA1,
.algorithm_mac = SSL_SHA1,
},
{
.name = SSL_TXT_SHA,
.algorithm_mac = SSL_SHA1,
},
{
.name = SSL_TXT_SHA256,
.algorithm_mac = SSL_SHA256,
},
{
.name = SSL_TXT_SHA384,
.algorithm_mac = SSL_SHA384,
},
/* protocol version aliases */
{
.name = SSL_TXT_SSLV3,
.algorithm_ssl = SSL_SSLV3,
},
{
.name = SSL_TXT_TLSV1,
.algorithm_ssl = SSL_TLSV1,
},
{
.name = SSL_TXT_TLSV1_2,
.algorithm_ssl = SSL_TLSV1_2,
},
{
.name = SSL_TXT_TLSV1_3,
.algorithm_ssl = SSL_TLSV1_3,
},
/* cipher suite aliases */
#ifdef LIBRESSL_HAS_TLS1_3
{
.valid = 1,
.name = "TLS_AES_128_GCM_SHA256",
.id = TLS1_3_CK_AES_128_GCM_SHA256,
.algorithm_ssl = SSL_TLSV1_3,
},
{
.valid = 1,
.name = "TLS_AES_256_GCM_SHA384",
.id = TLS1_3_CK_AES_256_GCM_SHA384,
.algorithm_ssl = SSL_TLSV1_3,
},
{
.valid = 1,
.name = "TLS_CHACHA20_POLY1305_SHA256",
.id = TLS1_3_CK_CHACHA20_POLY1305_SHA256,
.algorithm_ssl = SSL_TLSV1_3,
},
#endif
/* strength classes */
{
.name = SSL_TXT_LOW,
.algo_strength = SSL_LOW,
},
{
.name = SSL_TXT_MEDIUM,
.algo_strength = SSL_MEDIUM,
},
{
.name = SSL_TXT_HIGH,
.algo_strength = SSL_HIGH,
},
};
int
ssl_cipher_get_evp(const SSL_SESSION *ss, const EVP_CIPHER **enc,
const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size)
{
*enc = NULL;
*md = NULL;
*mac_pkey_type = NID_undef;
*mac_secret_size = 0;
if (ss->cipher == NULL)
return 0;
/*
* This function does not handle EVP_AEAD.
* See ssl_cipher_get_evp_aead instead.
*/
if (ss->cipher->algorithm_mac & SSL_AEAD)
return 0;
switch (ss->cipher->algorithm_enc) {
case SSL_3DES:
*enc = EVP_des_ede3_cbc();
break;
case SSL_RC4:
*enc = EVP_rc4();
break;
case SSL_eNULL:
*enc = EVP_enc_null();
break;
case SSL_AES128:
*enc = EVP_aes_128_cbc();
break;
case SSL_AES256:
*enc = EVP_aes_256_cbc();
break;
case SSL_CAMELLIA128:
*enc = EVP_camellia_128_cbc();
break;
case SSL_CAMELLIA256:
*enc = EVP_camellia_256_cbc();
break;
}
switch (ss->cipher->algorithm_mac) {
case SSL_MD5:
*md = EVP_md5();
break;
case SSL_SHA1:
*md = EVP_sha1();
break;
case SSL_SHA256:
*md = EVP_sha256();
break;
case SSL_SHA384:
*md = EVP_sha384();
break;
}
if (*enc == NULL || *md == NULL)
return 0;
/* XXX remove these from ssl_cipher_get_evp? */
/*
* EVP_CIPH_FLAG_AEAD_CIPHER and EVP_CIPH_GCM_MODE ciphers are not
* supported via EVP_CIPHER (they should be using EVP_AEAD instead).
*/
if (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)
return 0;
if (EVP_CIPHER_mode(*enc) == EVP_CIPH_GCM_MODE)
return 0;
*mac_pkey_type = EVP_PKEY_HMAC;
*mac_secret_size = EVP_MD_size(*md);
return 1;
}
/*
* ssl_cipher_get_evp_aead sets aead to point to the correct EVP_AEAD object
* for s->cipher. It returns 1 on success and 0 on error.
*/
int
ssl_cipher_get_evp_aead(const SSL_SESSION *ss, const EVP_AEAD **aead)
{
*aead = NULL;
if (ss->cipher == NULL)
return 0;
if ((ss->cipher->algorithm_mac & SSL_AEAD) == 0)
return 0;
switch (ss->cipher->algorithm_enc) {
case SSL_AES128GCM:
*aead = EVP_aead_aes_128_gcm();
return 1;
case SSL_AES256GCM:
*aead = EVP_aead_aes_256_gcm();
return 1;
case SSL_CHACHA20POLY1305:
*aead = EVP_aead_chacha20_poly1305();
return 1;
default:
break;
}
return 0;
}
int
ssl_get_handshake_evp_md(SSL *s, const EVP_MD **md)
{
unsigned long handshake_mac;
*md = NULL;
if (s->s3->hs.cipher == NULL)
return 0;
handshake_mac = s->s3->hs.cipher->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
/* For TLSv1.2 we upgrade the default MD5+SHA1 MAC to SHA256. */
if (SSL_USE_SHA256_PRF(s) && handshake_mac == SSL_HANDSHAKE_MAC_DEFAULT)
handshake_mac = SSL_HANDSHAKE_MAC_SHA256;
switch (handshake_mac) {
case SSL_HANDSHAKE_MAC_DEFAULT:
*md = EVP_md5_sha1();
return 1;
case SSL_HANDSHAKE_MAC_SHA256:
*md = EVP_sha256();
return 1;
case SSL_HANDSHAKE_MAC_SHA384:
*md = EVP_sha384();
return 1;
default:
break;
}
return 0;
}
#define ITEM_SEP(a) \
(((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
static void
ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
CIPHER_ORDER **tail)
{
if (curr == *tail)
return;
if (curr == *head)
*head = curr->next;
if (curr->prev != NULL)
curr->prev->next = curr->next;
if (curr->next != NULL)
curr->next->prev = curr->prev;
(*tail)->next = curr;
curr->prev= *tail;
curr->next = NULL;
*tail = curr;
}
static void
ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
CIPHER_ORDER **tail)
{
if (curr == *head)
return;
if (curr == *tail)
*tail = curr->prev;
if (curr->next != NULL)
curr->next->prev = curr->prev;
if (curr->prev != NULL)
curr->prev->next = curr->next;
(*head)->prev = curr;
curr->next= *head;
curr->prev = NULL;
*head = curr;
}
/* XXX beck: remove this in a followon to removing GOST */
static void
ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth,
unsigned long *enc, unsigned long *mac, unsigned long *ssl)
{
*mkey = 0;
*auth = 0;
*enc = 0;
*mac = 0;
*ssl = 0;
#ifdef SSL_FORBID_ENULL
*enc |= SSL_eNULL;
#endif
}
static void
ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, int num_of_ciphers,
unsigned long disabled_mkey, unsigned long disabled_auth,
unsigned long disabled_enc, unsigned long disabled_mac,
unsigned long disabled_ssl, CIPHER_ORDER *co_list,
CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
{
int i, co_list_num;
const SSL_CIPHER *c;
/*
* We have num_of_ciphers descriptions compiled in, depending on the
* method selected (SSLv3, TLSv1, etc). These will later be sorted in
* a linked list with at most num entries.
*/
/* Get the initial list of ciphers */
co_list_num = 0; /* actual count of ciphers */
for (i = 0; i < num_of_ciphers; i++) {
c = ssl_method->get_cipher(i);
/*
* Drop any invalid ciphers and any which use unavailable
* algorithms.
*/
if ((c != NULL) && c->valid &&
!(c->algorithm_mkey & disabled_mkey) &&
!(c->algorithm_auth & disabled_auth) &&
!(c->algorithm_enc & disabled_enc) &&
!(c->algorithm_mac & disabled_mac) &&
!(c->algorithm_ssl & disabled_ssl)) {
co_list[co_list_num].cipher = c;
co_list[co_list_num].next = NULL;
co_list[co_list_num].prev = NULL;
co_list[co_list_num].active = 0;
co_list_num++;
}
}
/*
* Prepare linked list from list entries
*/
if (co_list_num > 0) {
co_list[0].prev = NULL;
if (co_list_num > 1) {
co_list[0].next = &co_list[1];
for (i = 1; i < co_list_num - 1; i++) {
co_list[i].prev = &co_list[i - 1];
co_list[i].next = &co_list[i + 1];
}
co_list[co_list_num - 1].prev =
&co_list[co_list_num - 2];
}
co_list[co_list_num - 1].next = NULL;
*head_p = &co_list[0];
*tail_p = &co_list[co_list_num - 1];
}
}
static void
ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, int num_of_group_aliases,
unsigned long disabled_mkey, unsigned long disabled_auth,
unsigned long disabled_enc, unsigned long disabled_mac,
unsigned long disabled_ssl, CIPHER_ORDER *head)
{
CIPHER_ORDER *ciph_curr;
const SSL_CIPHER **ca_curr;
int i;
unsigned long mask_mkey = ~disabled_mkey;
unsigned long mask_auth = ~disabled_auth;
unsigned long mask_enc = ~disabled_enc;
unsigned long mask_mac = ~disabled_mac;
unsigned long mask_ssl = ~disabled_ssl;
/*
* First, add the real ciphers as already collected
*/
ciph_curr = head;
ca_curr = ca_list;
while (ciph_curr != NULL) {
*ca_curr = ciph_curr->cipher;
ca_curr++;
ciph_curr = ciph_curr->next;
}
/*
* Now we add the available ones from the cipher_aliases[] table.
* They represent either one or more algorithms, some of which
* in any affected category must be supported (set in enabled_mask),
* or represent a cipher strength value (will be added in any case because algorithms=0).
*/
for (i = 0; i < num_of_group_aliases; i++) {
unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
if (algorithm_mkey)
if ((algorithm_mkey & mask_mkey) == 0)
continue;
if (algorithm_auth)
if ((algorithm_auth & mask_auth) == 0)
continue;
if (algorithm_enc)
if ((algorithm_enc & mask_enc) == 0)
continue;
if (algorithm_mac)
if ((algorithm_mac & mask_mac) == 0)
continue;
if (algorithm_ssl)
if ((algorithm_ssl & mask_ssl) == 0)
continue;
*ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
ca_curr++;
}
*ca_curr = NULL; /* end of list */
}
static void
ssl_cipher_apply_rule(unsigned long cipher_id, unsigned long alg_mkey,
unsigned long alg_auth, unsigned long alg_enc, unsigned long alg_mac,
unsigned long alg_ssl, unsigned long algo_strength, int rule,
int strength_bits, CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
{
CIPHER_ORDER *head, *tail, *curr, *next, *last;
const SSL_CIPHER *cp;
int reverse = 0;
if (rule == CIPHER_DEL)
reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
head = *head_p;
tail = *tail_p;
if (reverse) {
next = tail;
last = head;
} else {
next = head;
last = tail;
}
curr = NULL;
for (;;) {
if (curr == last)
break;
curr = next;
next = reverse ? curr->prev : curr->next;
cp = curr->cipher;
if (cipher_id && cp->id != cipher_id)
continue;
/*
* Selection criteria is either the value of strength_bits
* or the algorithms used.
*/
if (strength_bits >= 0) {
if (strength_bits != cp->strength_bits)
continue;
} else {
if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
continue;
if (alg_auth && !(alg_auth & cp->algorithm_auth))
continue;
if (alg_enc && !(alg_enc & cp->algorithm_enc))
continue;
if (alg_mac && !(alg_mac & cp->algorithm_mac))
continue;
if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
continue;
if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
continue;
}
/* add the cipher if it has not been added yet. */
if (rule == CIPHER_ADD) {
/* reverse == 0 */
if (!curr->active) {
ll_append_tail(&head, curr, &tail);
curr->active = 1;
}
}
/* Move the added cipher to this location */
else if (rule == CIPHER_ORD) {
/* reverse == 0 */
if (curr->active) {
ll_append_tail(&head, curr, &tail);
}
} else if (rule == CIPHER_DEL) {
/* reverse == 1 */
if (curr->active) {
/* most recently deleted ciphersuites get best positions
* for any future CIPHER_ADD (note that the CIPHER_DEL loop
* works in reverse to maintain the order) */
ll_append_head(&head, curr, &tail);
curr->active = 0;
}
} else if (rule == CIPHER_KILL) {
/* reverse == 0 */
if (head == curr)
head = curr->next;
else
curr->prev->next = curr->next;
if (tail == curr)
tail = curr->prev;
curr->active = 0;
if (curr->next != NULL)
curr->next->prev = curr->prev;
if (curr->prev != NULL)
curr->prev->next = curr->next;
curr->next = NULL;
curr->prev = NULL;
}
}
*head_p = head;
*tail_p = tail;
}
static int
ssl_cipher_strength_sort(CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
{
int max_strength_bits, i, *number_uses;
CIPHER_ORDER *curr;
/*
* This routine sorts the ciphers with descending strength. The sorting
* must keep the pre-sorted sequence, so we apply the normal sorting
* routine as '+' movement to the end of the list.
*/
max_strength_bits = 0;
curr = *head_p;
while (curr != NULL) {
if (curr->active &&
(curr->cipher->strength_bits > max_strength_bits))
max_strength_bits = curr->cipher->strength_bits;
curr = curr->next;
}
number_uses = calloc((max_strength_bits + 1), sizeof(int));
if (!number_uses) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
return (0);
}
/*
* Now find the strength_bits values actually used
*/
curr = *head_p;
while (curr != NULL) {
if (curr->active)
number_uses[curr->cipher->strength_bits]++;
curr = curr->next;
}
/*
* Go through the list of used strength_bits values in descending
* order.
*/
for (i = max_strength_bits; i >= 0; i--)
if (number_uses[i] > 0)
ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
free(number_uses);
return (1);
}
static int
ssl_cipher_process_rulestr(const char *rule_str, CIPHER_ORDER **head_p,
CIPHER_ORDER **tail_p, const SSL_CIPHER **ca_list, SSL_CERT *cert,
int *tls13_seen)
{
unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
unsigned long algo_strength;
int j, multi, found, rule, retval, ok, buflen;
unsigned long cipher_id = 0;
const char *l, *buf;
char ch;
*tls13_seen = 0;
retval = 1;
l = rule_str;
for (;;) {
ch = *l;
if (ch == '\0')
break;
if (ch == '-') {
rule = CIPHER_DEL;
l++;
} else if (ch == '+') {
rule = CIPHER_ORD;
l++;
} else if (ch == '!') {
rule = CIPHER_KILL;
l++;
} else if (ch == '@') {
rule = CIPHER_SPECIAL;
l++;
} else {
rule = CIPHER_ADD;
}
if (ITEM_SEP(ch)) {
l++;
continue;
}
alg_mkey = 0;
alg_auth = 0;
alg_enc = 0;
alg_mac = 0;
alg_ssl = 0;
algo_strength = 0;
for (;;) {
ch = *l;
buf = l;
buflen = 0;
while (((ch >= 'A') && (ch <= 'Z')) ||
((ch >= '0') && (ch <= '9')) ||
((ch >= 'a') && (ch <= 'z')) ||
(ch == '-') || (ch == '.') ||
(ch == '_') || (ch == '=')) {
ch = *(++l);
buflen++;
}
if (buflen == 0) {
/*
* We hit something we cannot deal with,
* it is no command or separator nor
* alphanumeric, so we call this an error.
*/
SSLerrorx(SSL_R_INVALID_COMMAND);
return 0;
}
if (rule == CIPHER_SPECIAL) {
/* unused -- avoid compiler warning */
found = 0;
/* special treatment */
break;
}
/* check for multi-part specification */
if (ch == '+') {
multi = 1;
l++;
} else
multi = 0;
/*
* Now search for the cipher alias in the ca_list.
* Be careful with the strncmp, because the "buflen"
* limitation will make the rule "ADH:SOME" and the
* cipher "ADH-MY-CIPHER" look like a match for
* buflen=3. So additionally check whether the cipher
* name found has the correct length. We can save a
* strlen() call: just checking for the '\0' at the
* right place is sufficient, we have to strncmp()
* anyway (we cannot use strcmp(), because buf is not
* '\0' terminated.)
*/
j = found = 0;
cipher_id = 0;
while (ca_list[j]) {
if (!strncmp(buf, ca_list[j]->name, buflen) &&
(ca_list[j]->name[buflen] == '\0')) {
found = 1;
break;
} else
j++;
}
if (!found)
break; /* ignore this entry */
if (ca_list[j]->algorithm_mkey) {
if (alg_mkey) {
alg_mkey &= ca_list[j]->algorithm_mkey;
if (!alg_mkey) {
found = 0;
break;
}
} else
alg_mkey = ca_list[j]->algorithm_mkey;
}
if (ca_list[j]->algorithm_auth) {
if (alg_auth) {
alg_auth &= ca_list[j]->algorithm_auth;
if (!alg_auth) {
found = 0;
break;
}
} else
alg_auth = ca_list[j]->algorithm_auth;
}
if (ca_list[j]->algorithm_enc) {
if (alg_enc) {
alg_enc &= ca_list[j]->algorithm_enc;
if (!alg_enc) {
found = 0;
break;
}
} else
alg_enc = ca_list[j]->algorithm_enc;
}
if (ca_list[j]->algorithm_mac) {
if (alg_mac) {
alg_mac &= ca_list[j]->algorithm_mac;
if (!alg_mac) {
found = 0;
break;
}
} else
alg_mac = ca_list[j]->algorithm_mac;
}
if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
if (algo_strength & SSL_STRONG_MASK) {
algo_strength &=
(ca_list[j]->algo_strength &
SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
if (!(algo_strength &
SSL_STRONG_MASK)) {
found = 0;
break;
}
} else
algo_strength |=
ca_list[j]->algo_strength &
SSL_STRONG_MASK;
}
if (ca_list[j]->valid) {
/*
* explicit ciphersuite found; its protocol
* version does not become part of the search
* pattern!
*/
cipher_id = ca_list[j]->id;
if (ca_list[j]->algorithm_ssl == SSL_TLSV1_3)
*tls13_seen = 1;
} else {
/*
* not an explicit ciphersuite; only in this
* case, the protocol version is considered
* part of the search pattern
*/
if (ca_list[j]->algorithm_ssl) {
if (alg_ssl) {
alg_ssl &=
ca_list[j]->algorithm_ssl;
if (!alg_ssl) {
found = 0;
break;
}
} else
alg_ssl =
ca_list[j]->algorithm_ssl;
}
}
if (!multi)
break;
}
/*
* Ok, we have the rule, now apply it
*/
if (rule == CIPHER_SPECIAL) {
/* special command */
ok = 0;
if (buflen == 8 && strncmp(buf, "STRENGTH", 8) == 0) {
ok = ssl_cipher_strength_sort(head_p, tail_p);
} else if (buflen == 10 &&
strncmp(buf, "SECLEVEL=", 9) == 0) {
int level = buf[9] - '0';
if (level >= 0 && level <= 5) {
cert->security_level = level;
ok = 1;
} else {
SSLerrorx(SSL_R_INVALID_COMMAND);
}
} else {
SSLerrorx(SSL_R_INVALID_COMMAND);
}
if (ok == 0)
retval = 0;
while ((*l != '\0') && !ITEM_SEP(*l))
l++;
} else if (found) {
if (alg_ssl == SSL_TLSV1_3)
*tls13_seen = 1;
ssl_cipher_apply_rule(cipher_id, alg_mkey, alg_auth,
alg_enc, alg_mac, alg_ssl, algo_strength, rule,
-1, head_p, tail_p);
} else {
while ((*l != '\0') && !ITEM_SEP(*l))
l++;
}
if (*l == '\0')
break; /* done */
}
return (retval);
}
static inline int
ssl_aes_is_accelerated(void)
{
#if defined(__i386__) || defined(__x86_64__)
return ((OPENSSL_cpu_caps() & (1ULL << 57)) != 0);
#else
return (0);
#endif
}
STACK_OF(SSL_CIPHER) *
ssl_create_cipher_list(const SSL_METHOD *ssl_method,
STACK_OF(SSL_CIPHER) **cipher_list,
STACK_OF(SSL_CIPHER) *cipher_list_tls13,
const char *rule_str, SSL_CERT *cert)
{
int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
STACK_OF(SSL_CIPHER) *cipherstack = NULL, *ret = NULL;
const char *rule_p;
CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
const SSL_CIPHER **ca_list = NULL;
const SSL_CIPHER *cipher;
int tls13_seen = 0;
int any_active;
int i;
/*
* Return with error if nothing to do.
*/
if (rule_str == NULL || cipher_list == NULL)
goto err;
/*
* To reduce the work to do we only want to process the compiled
* in algorithms, so we first get the mask of disabled ciphers.
*/
ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
/*
* Now we have to collect the available ciphers from the compiled
* in ciphers. We cannot get more than the number compiled in, so
* it is used for allocation.
*/
num_of_ciphers = ssl3_num_ciphers();
co_list = reallocarray(NULL, num_of_ciphers, sizeof(CIPHER_ORDER));
if (co_list == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
co_list, &head, &tail);
/* Now arrange all ciphers by preference: */
/* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
if (ssl_aes_is_accelerated()) {
/*
* We have hardware assisted AES - prefer AES as a symmetric
* cipher, with CHACHA20 second.
*/
ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
CIPHER_ADD, -1, &head, &tail);
ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
0, 0, 0, CIPHER_ADD, -1, &head, &tail);
} else {
/*
* CHACHA20 is fast and safe on all hardware and is thus our
* preferred symmetric cipher, with AES second.
*/
ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
0, 0, 0, CIPHER_ADD, -1, &head, &tail);
ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
CIPHER_ADD, -1, &head, &tail);
}
/* Temporarily enable everything else for sorting */
ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
/* Low priority for MD5 */
ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
/* Move anonymous ciphers to the end. Usually, these will remain disabled.
* (For applications that allow them, they aren't too bad, but we prefer
* authenticated ciphers.) */
ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
/* Move ciphers without forward secrecy to the end */
ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
/* RC4 is sort of broken - move it to the end */
ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
/* Now sort by symmetric encryption strength. The above ordering remains
* in force within each class */
if (!ssl_cipher_strength_sort(&head, &tail))
goto err;
/* Now disable everything (maintaining the ordering!) */
ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
/* TLSv1.3 first. */
ssl_cipher_apply_rule(0, 0, 0, 0, 0, SSL_TLSV1_3, 0, CIPHER_ADD, -1, &head, &tail);
ssl_cipher_apply_rule(0, 0, 0, 0, 0, SSL_TLSV1_3, 0, CIPHER_DEL, -1, &head, &tail);
/*
* We also need cipher aliases for selecting based on the rule_str.
* There might be two types of entries in the rule_str: 1) names
* of ciphers themselves 2) aliases for groups of ciphers.
* For 1) we need the available ciphers and for 2) the cipher
* groups of cipher_aliases added together in one list (otherwise
* we would be happy with just the cipher_aliases table).
*/
num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
ca_list = reallocarray(NULL, num_of_alias_max, sizeof(SSL_CIPHER *));
if (ca_list == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mkey,
disabled_auth, disabled_enc, disabled_mac, disabled_ssl, head);
/*
* If the rule_string begins with DEFAULT, apply the default rule
* before using the (possibly available) additional rules.
*/
ok = 1;
rule_p = rule_str;
if (strncmp(rule_str, "DEFAULT", 7) == 0) {
ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
&head, &tail, ca_list, cert, &tls13_seen);
rule_p += 7;
if (*rule_p == ':')
rule_p++;
}
if (ok && (strlen(rule_p) > 0))
ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list,
cert, &tls13_seen);
if (!ok) {
/* Rule processing failure */
goto err;
}
/*
* Allocate new "cipherstack" for the result, return with error
* if we cannot get one.
*/
if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
/* Prefer TLSv1.3 cipher suites. */
if (cipher_list_tls13 != NULL) {
for (i = 0; i < sk_SSL_CIPHER_num(cipher_list_tls13); i++) {
cipher = sk_SSL_CIPHER_value(cipher_list_tls13, i);
if (!sk_SSL_CIPHER_push(cipherstack, cipher)) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
}
tls13_seen = 1;
}
/*
* The cipher selection for the list is done. The ciphers are added
* to the resulting precedence to the STACK_OF(SSL_CIPHER).
*
* If the rule string did not contain any references to TLSv1.3 and
* TLSv1.3 cipher suites have not been configured separately,
* include inactive TLSv1.3 cipher suites. This avoids attempts to
* use TLSv1.3 with an older rule string that does not include
* TLSv1.3 cipher suites. If the rule string resulted in no active
* cipher suites then we return an empty stack.
*/
any_active = 0;
for (curr = head; curr != NULL; curr = curr->next) {
if (curr->active ||
(!tls13_seen && curr->cipher->algorithm_ssl == SSL_TLSV1_3)) {
if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
goto err;
}
}
any_active |= curr->active;
}
if (!any_active)
sk_SSL_CIPHER_zero(cipherstack);
sk_SSL_CIPHER_free(*cipher_list);
*cipher_list = cipherstack;
cipherstack = NULL;
ret = *cipher_list;
err:
sk_SSL_CIPHER_free(cipherstack);
free((void *)ca_list);
free(co_list);
return ret;
}
char *
SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
{
unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
const char *ver, *kx, *au, *enc, *mac;
char *ret;
int l;
alg_mkey = cipher->algorithm_mkey;
alg_auth = cipher->algorithm_auth;
alg_enc = cipher->algorithm_enc;
alg_mac = cipher->algorithm_mac;
alg_ssl = cipher->algorithm_ssl;
if (alg_ssl & SSL_SSLV3)
ver = "SSLv3";
else if (alg_ssl & SSL_TLSV1_2)
ver = "TLSv1.2";
else if (alg_ssl & SSL_TLSV1_3)
ver = "TLSv1.3";
else
ver = "unknown";
switch (alg_mkey) {
case SSL_kRSA:
kx = "RSA";
break;
case SSL_kDHE:
kx = "DH";
break;
case SSL_kECDHE:
kx = "ECDH";
break;
case SSL_kTLS1_3:
kx = "TLSv1.3";
break;
default:
kx = "unknown";
}
switch (alg_auth) {
case SSL_aRSA:
au = "RSA";
break;
case SSL_aDSS:
au = "DSS";
break;
case SSL_aNULL:
au = "None";
break;
case SSL_aECDSA:
au = "ECDSA";
break;
case SSL_aTLS1_3:
au = "TLSv1.3";
break;
default:
au = "unknown";
break;
}
switch (alg_enc) {
case SSL_3DES:
enc = "3DES(168)";
break;
case SSL_RC4:
enc = "RC4(128)";
break;
case SSL_eNULL:
enc = "None";
break;
case SSL_AES128:
enc = "AES(128)";
break;
case SSL_AES256:
enc = "AES(256)";
break;
case SSL_AES128GCM:
enc = "AESGCM(128)";
break;
case SSL_AES256GCM:
enc = "AESGCM(256)";
break;
case SSL_CAMELLIA128:
enc = "Camellia(128)";
break;
case SSL_CAMELLIA256:
enc = "Camellia(256)";
break;
case SSL_CHACHA20POLY1305:
enc = "ChaCha20-Poly1305";
break;
default:
enc = "unknown";
break;
}
switch (alg_mac) {
case SSL_MD5:
mac = "MD5";
break;
case SSL_SHA1:
mac = "SHA1";
break;
case SSL_SHA256:
mac = "SHA256";
break;
case SSL_SHA384:
mac = "SHA384";
break;
case SSL_AEAD:
mac = "AEAD";
break;
default:
mac = "unknown";
break;
}
if (asprintf(&ret, "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n",
cipher->name, ver, kx, au, enc, mac) == -1)
return "OPENSSL_malloc Error";
if (buf != NULL) {
l = strlcpy(buf, ret, len);
free(ret);
ret = buf;
if (l >= len)
ret = "Buffer too small";
}
return (ret);
}
LSSL_ALIAS(SSL_CIPHER_description);
const char *
SSL_CIPHER_get_version(const SSL_CIPHER *c)
{
if (c == NULL)
return("(NONE)");
if ((c->id >> 24) == 3)
return("TLSv1/SSLv3");
else
return("unknown");
}
LSSL_ALIAS(SSL_CIPHER_get_version);
/* return the actual cipher being used */
const char *
SSL_CIPHER_get_name(const SSL_CIPHER *c)
{
if (c != NULL)
return (c->name);
return("(NONE)");
}
LSSL_ALIAS(SSL_CIPHER_get_name);
/* number of bits for symmetric cipher */
int
SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
{
int ret = 0;
if (c != NULL) {
if (alg_bits != NULL)
*alg_bits = c->alg_bits;
ret = c->strength_bits;
}
return (ret);
}
LSSL_ALIAS(SSL_CIPHER_get_bits);
unsigned long
SSL_CIPHER_get_id(const SSL_CIPHER *c)
{
return c->id;
}
LSSL_ALIAS(SSL_CIPHER_get_id);
uint16_t
SSL_CIPHER_get_value(const SSL_CIPHER *c)
{
return ssl3_cipher_get_value(c);
}
LSSL_ALIAS(SSL_CIPHER_get_value);
const SSL_CIPHER *
SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
{
uint16_t cipher_value;
CBS cbs;
/* This API is documented with ptr being an array of length two. */
CBS_init(&cbs, ptr, 2);
if (!CBS_get_u16(&cbs, &cipher_value))
return NULL;
return ssl3_get_cipher_by_value(cipher_value);
}
LSSL_ALIAS(SSL_CIPHER_find);
int
SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
{
switch (c->algorithm_enc) {
case SSL_eNULL:
return NID_undef;
case SSL_3DES:
return NID_des_ede3_cbc;
case SSL_AES128:
return NID_aes_128_cbc;
case SSL_AES128GCM:
return NID_aes_128_gcm;
case SSL_AES256:
return NID_aes_256_cbc;
case SSL_AES256GCM:
return NID_aes_256_gcm;
case SSL_CAMELLIA128:
return NID_camellia_128_cbc;
case SSL_CAMELLIA256:
return NID_camellia_256_cbc;
case SSL_CHACHA20POLY1305:
return NID_chacha20_poly1305;
case SSL_DES:
return NID_des_cbc;
case SSL_RC4:
return NID_rc4;
default:
return NID_undef;
}
}
LSSL_ALIAS(SSL_CIPHER_get_cipher_nid);
int
SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
{
switch (c->algorithm_mac) {
case SSL_AEAD:
return NID_undef;
case SSL_MD5:
return NID_md5;
case SSL_SHA1:
return NID_sha1;
case SSL_SHA256:
return NID_sha256;
case SSL_SHA384:
return NID_sha384;
default:
return NID_undef;
}
}
LSSL_ALIAS(SSL_CIPHER_get_digest_nid);
int
SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
{
switch (c->algorithm_mkey) {
case SSL_kDHE:
return NID_kx_dhe;
case SSL_kECDHE:
return NID_kx_ecdhe;
case SSL_kRSA:
return NID_kx_rsa;
default:
return NID_undef;
}
}
LSSL_ALIAS(SSL_CIPHER_get_kx_nid);
int
SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
{
switch (c->algorithm_auth) {
case SSL_aNULL:
return NID_auth_null;
case SSL_aECDSA:
return NID_auth_ecdsa;
case SSL_aRSA:
return NID_auth_rsa;
default:
return NID_undef;
}
}
LSSL_ALIAS(SSL_CIPHER_get_auth_nid);
int
SSL_CIPHER_is_aead(const SSL_CIPHER *c)
{
return (c->algorithm_mac & SSL_AEAD) == SSL_AEAD;
}
LSSL_ALIAS(SSL_CIPHER_is_aead);
void *
SSL_COMP_get_compression_methods(void)
{
return NULL;
}
LSSL_ALIAS(SSL_COMP_get_compression_methods);
int
SSL_COMP_add_compression_method(int id, void *cm)
{
return 1;
}
LSSL_ALIAS(SSL_COMP_add_compression_method);
const char *
SSL_COMP_get_name(const void *comp)
{
return NULL;
}
LSSL_ALIAS(SSL_COMP_get_name);
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