| /* 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 <assert.h> |
| |
| #include <openssl/engine.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| |
| #include "ssl_locl.h" |
| |
| struct handshake_digest |
| { |
| long mask; |
| const EVP_MD *(*md_func)(void); |
| }; |
| |
| static const struct handshake_digest ssl_handshake_digests[SSL_MAX_DIGEST] = { |
| { SSL_HANDSHAKE_MAC_MD5, EVP_md5 }, |
| { SSL_HANDSHAKE_MAC_SHA, EVP_sha1 }, |
| { SSL_HANDSHAKE_MAC_SHA256, EVP_sha256 }, |
| { SSL_HANDSHAKE_MAC_SHA384, EVP_sha384 }, |
| }; |
| |
| #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; |
| int in_group; |
| struct cipher_order_st *next,*prev; |
| } CIPHER_ORDER; |
| |
| static const SSL_CIPHER cipher_aliases[]={ |
| {0,SSL_TXT_ALL,0, 0,0,0,0,0,0,0,0,0}, |
| |
| /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */ |
| {0,SSL_TXT_CMPDEF,0, SSL_kEDH|SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0}, |
| |
| /* 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) */ |
| {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0}, |
| |
| {0,SSL_TXT_kEDH,0, SSL_kEDH, 0,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_DH,0, SSL_kEDH,0,0,0,0,0,0,0,0}, |
| |
| {0,SSL_TXT_kEECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_ECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0}, |
| |
| {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0}, |
| |
| /* server authentication aliases */ |
| {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0}, |
| {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0}, |
| {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0}, |
| {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0}, |
| |
| /* aliases combining key exchange and server authentication */ |
| {0,SSL_TXT_EDH,0, SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_EECDH,0, SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_ADH,0, SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_AECDH,0, SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0}, |
| {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0}, |
| |
| |
| /* symmetric encryption aliases */ |
| {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0}, |
| {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0}, |
| {0,SSL_TXT_AES128,0, 0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0}, |
| {0,SSL_TXT_AES256,0, 0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0}, |
| {0,SSL_TXT_AES,0, 0,0,SSL_AES,0,0,0,0,0,0}, |
| {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0}, |
| {0,SSL_TXT_CHACHA20 ,0,0,0,SSL_CHACHA20POLY1305,0,0,0,0,0,0}, |
| |
| /* MAC aliases */ |
| {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0}, |
| {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, |
| {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0}, |
| {0,SSL_TXT_SHA256,0, 0,0,0,SSL_SHA256, 0,0,0,0,0}, |
| {0,SSL_TXT_SHA384,0, 0,0,0,SSL_SHA384, 0,0,0,0,0}, |
| |
| /* protocol version aliases */ |
| {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0}, |
| {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0}, |
| {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0}, |
| |
| /* strength classes */ |
| {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0}, |
| {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0}, |
| /* FIPS 140-2 approved ciphersuite */ |
| {0,SSL_TXT_FIPS,0, 0,0,0,0,0,SSL_FIPS, 0,0,0}, |
| }; |
| |
| /* 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 *s, const EVP_AEAD **aead) |
| { |
| const SSL_CIPHER *c = s->cipher; |
| |
| *aead = NULL; |
| |
| if (c == NULL) |
| return 0; |
| if ((c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD) == 0 && |
| (c->algorithm2 & SSL_CIPHER_ALGORITHM2_STATEFUL_AEAD) == 0) |
| return 0; |
| |
| switch (c->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; |
| case SSL_RC4: |
| if (c->algorithm_mac == SSL_MD5) |
| *aead = EVP_aead_rc4_md5_tls(); |
| else |
| return 0; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, |
| const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size) |
| { |
| const SSL_CIPHER *c; |
| |
| c=s->cipher; |
| if (c == NULL) return(0); |
| |
| /* This function doesn't deal with EVP_AEAD. See |
| * |ssl_cipher_get_aead_evp|. */ |
| if (c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD) |
| return(0); |
| |
| if ((enc == NULL) || (md == NULL)) return(0); |
| |
| switch (c->algorithm_enc) |
| { |
| case SSL_3DES: |
| *enc = EVP_des_ede3_cbc(); |
| break; |
| case SSL_RC4: |
| *enc = EVP_rc4(); |
| break; |
| case SSL_AES128: |
| *enc = EVP_aes_128_cbc(); |
| break; |
| case SSL_AES256: |
| *enc = EVP_aes_256_cbc(); |
| break; |
| default: |
| return 0; |
| } |
| |
| if (!ssl_cipher_get_mac(s, md, mac_pkey_type, mac_secret_size)) |
| return 0; |
| |
| assert(*enc != NULL && *md != NULL); |
| |
| /* TODO(fork): enable the stitched cipher modes. */ |
| #if 0 |
| if (s->ssl_version>>8 != TLS1_VERSION_MAJOR || |
| s->ssl_version < TLS1_VERSION) |
| return 1; |
| |
| if (c->algorithm_enc == SSL_RC4 && |
| c->algorithm_mac == SSL_MD5 && |
| (evp=EVP_get_cipherbyname("RC4-HMAC-MD5"))) |
| *enc = evp, *md = NULL; |
| else if (c->algorithm_enc == SSL_AES128 && |
| c->algorithm_mac == SSL_SHA1 && |
| (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1"))) |
| *enc = evp, *md = NULL; |
| else if (c->algorithm_enc == SSL_AES256 && |
| c->algorithm_mac == SSL_SHA1 && |
| (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1"))) |
| *enc = evp, *md = NULL; |
| #endif |
| |
| return 1; |
| } |
| |
| int ssl_cipher_get_mac(const SSL_SESSION *s, const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size) |
| { |
| const SSL_CIPHER *c; |
| |
| c=s->cipher; |
| if (c == NULL) return(0); |
| |
| switch (c->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; |
| default: |
| return 0; |
| } |
| |
| if (mac_pkey_type != NULL) |
| { |
| *mac_pkey_type = EVP_PKEY_HMAC; |
| } |
| if (mac_secret_size!=NULL) |
| { |
| *mac_secret_size = EVP_MD_size(*md); |
| } |
| return 1; |
| } |
| |
| int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) |
| { |
| if (idx < 0 || idx >= SSL_MAX_DIGEST) |
| { |
| return 0; |
| } |
| *mask = ssl_handshake_digests[idx].mask; |
| *md = ssl_handshake_digests[idx].md_func(); |
| return 1; |
| } |
| |
| #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; |
| } |
| |
| static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, |
| int num_of_ciphers, |
| 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 (SSLv2 and/or 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 those that use any of that is not available */ |
| if ((c != NULL) && c->valid) |
| { |
| 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[co_list_num].in_group = 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, |
| CIPHER_ORDER *head) |
| { |
| CIPHER_ORDER *ciph_curr; |
| const SSL_CIPHER **ca_curr; |
| int i; |
| |
| /* |
| * 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++) |
| { |
| *ca_curr = 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, int in_group, |
| CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) |
| { |
| CIPHER_ORDER *head, *tail, *curr, *next, *last; |
| const SSL_CIPHER *cp; |
| int reverse = 0; |
| |
| #ifdef CIPHER_DEBUG |
| printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d) in_group:%d\n", |
| rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits, in_group); |
| #endif |
| |
| 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; |
| |
| if (curr == NULL) break; |
| |
| next = reverse ? curr->prev : curr->next; |
| |
| cp = curr->cipher; |
| |
| /* |
| * 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 |
| { |
| #ifdef CIPHER_DEBUG |
| printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength); |
| #endif |
| 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 && !(algo_strength & cp->algo_strength)) |
| continue; |
| } |
| |
| #ifdef CIPHER_DEBUG |
| printf("Action = %d\n", rule); |
| #endif |
| |
| /* 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; |
| curr->in_group = in_group; |
| } |
| } |
| /* Move the added cipher to this location */ |
| else if (rule == CIPHER_ORD) |
| { |
| /* reverse == 0 */ |
| if (curr->active) |
| { |
| ll_append_tail(&head, curr, &tail); |
| curr->in_group = 0; |
| } |
| } |
| 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; |
| curr->in_group = 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 = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); |
| if (!number_uses) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_strength_sort, ERR_R_MALLOC_FAILURE); |
| return(0); |
| } |
| memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); |
| |
| /* |
| * 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, 0, head_p, tail_p); |
| |
| OPENSSL_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) |
| { |
| unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength; |
| const char *l, *buf; |
| int j, multi, found, rule, retval, ok, buflen, in_group = 0, |
| has_group = 0; |
| unsigned long cipher_id = 0; |
| char ch; |
| |
| retval = 1; |
| l = rule_str; |
| for (;;) |
| { |
| ch = *l; |
| |
| if (ch == '\0') |
| break; /* done */ |
| if (in_group) |
| { |
| if (ch == ']') |
| { |
| if (!in_group) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_UNEXPECTED_GROUP_CLOSE); |
| retval = found = in_group = 0; |
| break; |
| } |
| if (*tail_p) |
| (*tail_p)->in_group = 0; |
| in_group = 0; |
| l++; |
| continue; |
| } |
| if (ch == '|') |
| { rule = CIPHER_ADD; l++; continue; } |
| else if (!(ch >= 'a' && ch <= 'z') && |
| !(ch >= 'A' && ch <= 'Z') && |
| !(ch >= '0' && ch <= '9')) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_UNEXPECTED_OPERATOR_IN_GROUP); |
| retval = found = in_group = 0; |
| break; |
| } |
| else |
| rule = CIPHER_ADD; |
| } |
| else 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 if (ch == '[') |
| { |
| if (in_group) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_NESTED_GROUP); |
| retval = found = in_group = 0; |
| break; |
| } |
| in_group = 1; |
| has_group = 1; |
| l++; |
| continue; |
| } |
| else |
| { rule = CIPHER_ADD; } |
| |
| /* If preference groups are enabled, the only legal |
| * operator is +. Otherwise the in_group bits will get |
| * mixed up. */ |
| if (has_group && rule != CIPHER_ADD) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_MIXED_SPECIAL_OPERATOR_WITH_GROUPS); |
| retval = found = in_group = 0; |
| break; |
| } |
| |
| 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 = *(++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. |
| */ |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_INVALID_COMMAND); |
| retval = found = in_group = 0; |
| l++; |
| break; |
| } |
| |
| if (rule == CIPHER_SPECIAL) |
| { |
| found = 0; /* unused -- avoid compiler warning */ |
| break; /* special treatment */ |
| } |
| |
| /* 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) |
| { |
| if (algo_strength) |
| { |
| algo_strength &= ca_list[j]->algo_strength; |
| if (!algo_strength) { found = 0; break; } |
| } |
| else |
| algo_strength |= ca_list[j]->algo_strength; |
| } |
| |
| 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; |
| } |
| 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)) |
| ok = ssl_cipher_strength_sort(head_p, tail_p); |
| else |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_INVALID_COMMAND); |
| if (ok == 0) |
| retval = 0; |
| /* |
| * We do not support any "multi" options |
| * together with "@", so throw away the |
| * rest of the command, if any left, until |
| * end or ':' is found. |
| */ |
| while ((*l != '\0') && !ITEM_SEP(*l)) |
| l++; |
| } |
| else if (found) |
| { |
| ssl_cipher_apply_rule(cipher_id, |
| alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, |
| rule, -1, in_group, head_p, tail_p); |
| } |
| else |
| { |
| while ((*l != '\0') && !ITEM_SEP(*l)) |
| l++; |
| } |
| } |
| |
| if (in_group) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_cipher_process_rulestr, SSL_R_INVALID_COMMAND); |
| retval = 0; |
| } |
| |
| return(retval); |
| } |
| |
| |
| STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, |
| struct ssl_cipher_preference_list_st **cipher_list, |
| STACK_OF(SSL_CIPHER) **cipher_list_by_id, |
| const char *rule_str, CERT *c) |
| { |
| int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; |
| STACK_OF(SSL_CIPHER) *cipherstack = NULL, *tmp_cipher_list = NULL; |
| const char *rule_p; |
| CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; |
| const SSL_CIPHER **ca_list = NULL; |
| unsigned char *in_group_flags = NULL; |
| unsigned int num_in_group_flags = 0; |
| struct ssl_cipher_preference_list_st *pref_list = NULL; |
| |
| /* |
| * Return with error if nothing to do. |
| */ |
| if (rule_str == NULL || cipher_list == NULL) |
| return NULL; |
| |
| /* |
| * 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 = ssl_method->num_ciphers(); |
| co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); |
| if (co_list == NULL) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_create_cipher_list, ERR_R_MALLOC_FAILURE); |
| return(NULL); /* Failure */ |
| } |
| |
| ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, |
| co_list, &head, &tail); |
| |
| |
| /* Now arrange all ciphers by preference: |
| * TODO(davidben): Compute this order once and copy it. */ |
| |
| /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */ |
| ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, 0, &head, &tail); |
| |
| /* Order the bulk ciphers. First the preferred AEAD ciphers. We prefer |
| * CHACHA20 unless there is hardware support for fast and constant-time |
| * AES_GCM. */ |
| if (EVP_has_aes_hardware()) |
| { |
| ssl_cipher_apply_rule(0, 0, 0, SSL_AES256GCM, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_AES128GCM, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| } |
| else |
| { |
| ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_AES256GCM, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_AES128GCM, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| } |
| |
| /* Then the legacy non-AEAD ciphers: AES_256_CBC, AES-128_CBC, |
| * RC4_128_SHA, RC4_128_MD5, 3DES_EDE_CBC_SHA. */ |
| ssl_cipher_apply_rule(0, 0, 0, SSL_AES256, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_AES128, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, ~SSL_MD5, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, SSL_MD5, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| ssl_cipher_apply_rule(0, 0, 0, SSL_3DES, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| |
| /* Temporarily enable everything else for sorting */ |
| ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, 0, &head, &tail); |
| |
| /* Move ciphers without forward secrecy to the end. */ |
| ssl_cipher_apply_rule(0, ~(SSL_kEDH|SSL_kEECDH), 0, 0, 0, 0, 0, CIPHER_ORD, -1, 0, &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.) |
| * TODO(davidben): Remove them altogether? */ |
| ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, 0, &head, &tail); |
| |
| /* Now disable everything (maintaining the ordering!) */ |
| ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, 0, &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 = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); |
| if (ca_list == NULL) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_create_cipher_list, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, 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); |
| 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); |
| |
| OPENSSL_free((void *)ca_list); /* Not needed anymore */ |
| |
| if (!ok) |
| goto err; |
| |
| /* |
| * Allocate new "cipherstack" for the result, return with error |
| * if we cannot get one. |
| */ |
| if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) |
| goto err; |
| |
| in_group_flags = OPENSSL_malloc(num_of_ciphers); |
| if (!in_group_flags) |
| goto err; |
| /* |
| * The cipher selection for the list is done. The ciphers are added |
| * to the resulting precedence to the STACK_OF(SSL_CIPHER). |
| */ |
| for (curr = head; curr != NULL; curr = curr->next) |
| { |
| if (curr->active) |
| { |
| sk_SSL_CIPHER_push(cipherstack, curr->cipher); |
| in_group_flags[num_in_group_flags++] = curr->in_group; |
| #ifdef CIPHER_DEBUG |
| printf("<%s>\n",curr->cipher->name); |
| #endif |
| } |
| } |
| OPENSSL_free(co_list); /* Not needed any longer */ |
| co_list = NULL; |
| |
| tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); |
| if (tmp_cipher_list == NULL) |
| goto err; |
| pref_list = OPENSSL_malloc(sizeof(struct ssl_cipher_preference_list_st)); |
| if (!pref_list) |
| goto err; |
| pref_list->ciphers = cipherstack; |
| pref_list->in_group_flags = OPENSSL_malloc(num_in_group_flags); |
| if (!pref_list->in_group_flags) |
| goto err; |
| memcpy(pref_list->in_group_flags, in_group_flags, num_in_group_flags); |
| OPENSSL_free(in_group_flags); |
| in_group_flags = NULL; |
| if (*cipher_list != NULL) |
| ssl_cipher_preference_list_free(*cipher_list); |
| *cipher_list = pref_list; |
| pref_list = NULL; |
| |
| if (cipher_list_by_id != NULL) |
| { |
| if (*cipher_list_by_id != NULL) |
| sk_SSL_CIPHER_free(*cipher_list_by_id); |
| *cipher_list_by_id = tmp_cipher_list; |
| tmp_cipher_list = NULL; |
| (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); |
| |
| sk_SSL_CIPHER_sort(*cipher_list_by_id); |
| } |
| else |
| { |
| sk_SSL_CIPHER_free(tmp_cipher_list); |
| tmp_cipher_list = NULL; |
| } |
| |
| return(cipherstack); |
| |
| err: |
| if (co_list) |
| OPENSSL_free(co_list); |
| if (in_group_flags) |
| OPENSSL_free(in_group_flags); |
| if (cipherstack) |
| sk_SSL_CIPHER_free(cipherstack); |
| if (tmp_cipher_list) |
| sk_SSL_CIPHER_free(tmp_cipher_list); |
| if (pref_list && pref_list->in_group_flags) |
| OPENSSL_free(pref_list->in_group_flags); |
| if (pref_list) |
| OPENSSL_free(pref_list); |
| return NULL; |
| } |
| |
| const char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) |
| { |
| const char *ver; |
| const char *kx,*au,*enc,*mac; |
| unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl; |
| static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n"; |
| |
| 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 |
| ver="unknown"; |
| |
| switch (alg_mkey) |
| { |
| case SSL_kRSA: |
| kx="RSA"; |
| break; |
| case SSL_kEDH: |
| kx="DH"; |
| break; |
| case SSL_kEECDH: |
| kx="ECDH"; |
| break; |
| case SSL_kPSK: |
| kx="PSK"; |
| break; |
| default: |
| kx="unknown"; |
| } |
| |
| switch (alg_auth) |
| { |
| case SSL_aRSA: |
| au="RSA"; |
| break; |
| case SSL_aNULL: |
| au="None"; |
| break; |
| case SSL_aECDSA: |
| au="ECDSA"; |
| break; |
| case SSL_aPSK: |
| au="PSK"; |
| break; |
| default: |
| au="unknown"; |
| break; |
| } |
| |
| switch (alg_enc) |
| { |
| case SSL_3DES: |
| enc="3DES(168)"; |
| break; |
| case SSL_RC4: |
| enc="RC4(128)"; |
| 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_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 (buf == NULL) |
| { |
| len=128; |
| buf=OPENSSL_malloc(len); |
| if (buf == NULL) return("OPENSSL_malloc Error"); |
| } |
| else if (len < 128) |
| return("Buffer too small"); |
| |
| BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac); |
| return(buf); |
| } |
| |
| /* Next three functions require non-null cipher */ |
| int SSL_CIPHER_is_AES(const SSL_CIPHER *c) |
| { |
| return (c->algorithm_enc & SSL_AES) != 0; |
| } |
| |
| int SSL_CIPHER_has_MD5_HMAC(const SSL_CIPHER *c) |
| { |
| return (c->algorithm_mac & SSL_MD5) != 0; |
| } |
| |
| int SSL_CIPHER_is_AESGCM(const SSL_CIPHER *c) |
| { |
| return (c->algorithm_mac & (SSL_AES128GCM|SSL_AES256GCM)) != 0; |
| } |
| |
| int SSL_CIPHER_is_CHACHA20POLY1305(const SSL_CIPHER *c) |
| { |
| return (c->algorithm_enc & SSL_CHACHA20POLY1305) != 0; |
| } |
| |
| const char *SSL_CIPHER_get_version(const SSL_CIPHER *c) |
| { |
| int i; |
| |
| if (c == NULL) return("(NONE)"); |
| i=(int)(c->id>>24L); |
| if (i == 3) |
| return("TLSv1/SSLv3"); |
| else if (i == 2) |
| return("SSLv2"); |
| else |
| return("unknown"); |
| } |
| |
| /* return the actual cipher being used */ |
| const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) |
| { |
| if (c != NULL) |
| return(c->name); |
| return("(NONE)"); |
| } |
| |
| const char *SSL_CIPHER_get_kx_name(const SSL_CIPHER *cipher) { |
| if (cipher == NULL) { |
| return ""; |
| } |
| |
| switch (cipher->algorithm_mkey) { |
| case SSL_kRSA: |
| return SSL_TXT_RSA; |
| case SSL_kEDH: |
| switch (cipher->algorithm_auth) { |
| case SSL_aRSA: |
| return "DHE_" SSL_TXT_RSA; |
| case SSL_aNULL: |
| return SSL_TXT_DH "_anon"; |
| default: |
| return "UNKNOWN"; |
| } |
| case SSL_kEECDH: |
| switch (cipher->algorithm_auth) { |
| case SSL_aECDSA: |
| return "ECDHE_" SSL_TXT_ECDSA; |
| case SSL_aRSA: |
| return "ECDHE_" SSL_TXT_RSA; |
| case SSL_aNULL: |
| return SSL_TXT_ECDH "_anon"; |
| default: |
| return "UNKNOWN"; |
| } |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| |
| /* 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); |
| } |
| |
| unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c) |
| { |
| return c->id; |
| } |
| |
| void *SSL_COMP_get_compression_methods(void) |
| { |
| return NULL; |
| } |
| int SSL_COMP_add_compression_method(int id, void *cm) |
| { |
| return 1; |
| } |
| |
| const char *SSL_COMP_get_name(const void *comp) |
| { |
| return NULL; |
| } |
| |
| /* For a cipher return the index corresponding to the certificate type */ |
| int ssl_cipher_get_cert_index(const SSL_CIPHER *c) |
| { |
| unsigned long alg_a = c->algorithm_auth; |
| |
| if (alg_a & SSL_aECDSA) |
| return SSL_PKEY_ECC; |
| else if (alg_a & SSL_aRSA) |
| return SSL_PKEY_RSA_ENC; |
| return -1; |
| } |
| |
| /* ssl_cipher_has_server_public_key returns 1 if |cipher| involves a |
| * server public key in the key exchange, sent in a server Certificate |
| * message. Otherwise it returns 0. */ |
| int ssl_cipher_has_server_public_key(const SSL_CIPHER *cipher) |
| { |
| /* Anonymous ciphers do not include a server certificate. */ |
| if (cipher->algorithm_auth & SSL_aNULL) |
| return 0; |
| /* Neither do PSK ciphers, except for RSA_PSK. */ |
| if ((cipher->algorithm_auth & SSL_aPSK) && |
| !(cipher->algorithm_mkey & SSL_kRSA)) |
| return 0; |
| /* All other ciphers include it. */ |
| return 1; |
| } |
| |
| /* ssl_cipher_requires_server_key_exchange returns 1 if |cipher| |
| * requires a ServerKeyExchange message. Otherwise it returns 0. |
| * |
| * Unlike ssl_cipher_has_server_public_key, some ciphers take optional |
| * ServerKeyExchanges. PSK and RSA_PSK only use the ServerKeyExchange |
| * to communicate a psk_identity_hint, so it is optional. */ |
| int ssl_cipher_requires_server_key_exchange(const SSL_CIPHER *cipher) |
| { |
| /* Ephemeral Diffie-Hellman key exchanges require a |
| * ServerKeyExchange. */ |
| if (cipher->algorithm_mkey & SSL_kEDH || |
| cipher->algorithm_mkey & SSL_kEECDH) |
| return 1; |
| /* It is optional in all others. */ |
| return 0; |
| } |