ssl/ssl_ciph.c

   1 /* ssl/ssl_ciph.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116 /* ====================================================================
 117  * Copyright 2005 Nokia. All rights reserved.
 118  *
 119  * The portions of the attached software ("Contribution") is developed by
 120  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 121  * license.
 122  *
 123  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 124  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 125  * support (see RFC 4279) to OpenSSL.
 126  *
 127  * No patent licenses or other rights except those expressly stated in
 128  * the OpenSSL open source license shall be deemed granted or received
 129  * expressly, by implication, estoppel, or otherwise.
 130  *
 131  * No assurances are provided by Nokia that the Contribution does not
 132  * infringe the patent or other intellectual property rights of any third
 133  * party or that the license provides you with all the necessary rights
 134  * to make use of the Contribution.
 135  *
 136  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 137  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 138  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 139  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 140  * OTHERWISE.
 141  */
 142
 143 #include <stdio.h>
 144 #include <openssl/objects.h>
 145 #include <openssl/comp.h>
 146 #include <openssl/engine.h>
 147 #include "ssl_locl.h"
 148
 149 #define SSL_ENC_DES_IDX         0
 150 #define SSL_ENC_3DES_IDX        1
 151 #define SSL_ENC_RC4_IDX         2
 152 #define SSL_ENC_RC2_IDX         3
 153 #define SSL_ENC_IDEA_IDX        4
 154 #define SSL_ENC_NULL_IDX        5
 155 #define SSL_ENC_AES128_IDX      6
 156 #define SSL_ENC_AES256_IDX      7
 157 #define SSL_ENC_CAMELLIA128_IDX 8
 158 #define SSL_ENC_CAMELLIA256_IDX 9
 159 #define SSL_ENC_GOST89_IDX      10
 160 #define SSL_ENC_SEED_IDX        11
 161 #define SSL_ENC_NUM_IDX         12
 162
 163
 164 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
 165         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 166         };
 167
 168 #define SSL_COMP_NULL_IDX       0
 169 #define SSL_COMP_ZLIB_IDX       1
 170 #define SSL_COMP_NUM_IDX        2
 171
 172 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
 173
 174 #define SSL_MD_MD5_IDX  0
 175 #define SSL_MD_SHA1_IDX 1
 176 #define SSL_MD_GOST94_IDX 2
 177 #define SSL_MD_GOST89MAC_IDX 3
 178 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
 179  * defined in the
 180  * ssl_locl.h */
 181 #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST
 182 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
 183         NULL,NULL,NULL,NULL
 184         };
 185 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
 186  * implementation is engine-provided, we'll fill it only if
 187  * corresponding EVP_PKEY_METHOD is found
 188  */
 189 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
 190         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef
 191         };
 192
 193 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
 194         0,0,0,0
 195         };
 196
 197 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
 198         SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
 199         SSL_HANDSHAKE_MAC_GOST94,0
 200         };
 201
 202 #define CIPHER_ADD      1
 203 #define CIPHER_KILL     2
 204 #define CIPHER_DEL      3
 205 #define CIPHER_ORD      4
 206 #define CIPHER_SPECIAL  5
 207
 208 typedef struct cipher_order_st
 209         {
 210         SSL_CIPHER *cipher;
 211         int active;
 212         int dead;
 213         struct cipher_order_st *next,*prev;
 214         } CIPHER_ORDER;
 215
 216 static const SSL_CIPHER cipher_aliases[]={
 217         /* "ALL" doesn't include eNULL (must be specifically enabled) */
 218         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
 219         /* "COMPLEMENTOFALL" */
 220         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
 221
 222         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
 223         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
 224
 225         /* key exchange aliases
 226          * (some of those using only a single bit here combine
 227          * multiple key exchange algs according to the RFCs,
 228          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
 229         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
 230
 231         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 232         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 233         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 234         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 235         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 236
 237         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 238
 239         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 240         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 241         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 242         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 243         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 244
 245         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 246         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
 247
 248         /* server authentication aliases */
 249         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 250         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 251         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 252         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 253         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 254         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 255         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 256         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 257         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 258         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 259         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
 260         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
 261         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
 262
 263         /* aliases combining key exchange and server authentication */
 264         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 265         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 266         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 267         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 268         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 269         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 270         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 271         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 272
 273
 274         /* symmetric encryption aliases */
 275         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 276         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 277         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 278         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 279         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 280         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 281         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 282         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
 283         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
 284         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
 285         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 286         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 287         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 288
 289         /* MAC aliases */
 290         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 291         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 292         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 293         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 294         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 295
 296         /* protocol version aliases */
 297         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 298         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 299         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 300
 301         /* export flag */
 302         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 303         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 304
 305         /* strength classes */
 306         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 307         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 308         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 309         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 310         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 311         /* FIPS 140-2 approved ciphersuite */
 312         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
 313         };
 314 /* Search for public key algorithm with given name and
 315  * return its pkey_id if it is available. Otherwise return 0
 316  */
 317 static int get_optional_pkey_id(const char *pkey_name)
 318         {
 319         const EVP_PKEY_ASN1_METHOD *ameth;
 320         ENGINE *tmpeng = NULL;
 321         int pkey_id=0;
 322         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 323         if (ameth)
 324                 {
 325                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 326                 }
 327         if (tmpeng) ENGINE_finish(tmpeng);
 328         return pkey_id;
 329         }
 330
 331 void ssl_load_ciphers(void)
 332         {
 333         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 334                 EVP_get_cipherbyname(SN_des_cbc);
 335         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 336                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 337         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 338                 EVP_get_cipherbyname(SN_rc4);
 339         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 340                 EVP_get_cipherbyname(SN_rc2_cbc);
 341 #ifndef OPENSSL_NO_IDEA
 342         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 343                 EVP_get_cipherbyname(SN_idea_cbc);
 344 #else
 345         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 346 #endif
 347         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 348           EVP_get_cipherbyname(SN_aes_128_cbc);
 349         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 350           EVP_get_cipherbyname(SN_aes_256_cbc);
 351         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 352           EVP_get_cipherbyname(SN_camellia_128_cbc);
 353         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 354           EVP_get_cipherbyname(SN_camellia_256_cbc);
 355         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 356           EVP_get_cipherbyname(SN_gost89_cnt);
 357         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 358           EVP_get_cipherbyname(SN_seed_cbc);
 359
 360         ssl_digest_methods[SSL_MD_MD5_IDX]=
 361                 EVP_get_digestbyname(SN_md5);
 362         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 363                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 364         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 365                 EVP_get_digestbyname(SN_sha1);
 366         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 367                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 368         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 369                 EVP_get_digestbyname(SN_id_GostR3411_94);
 370         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 371                 {
 372                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 373                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 374                 }
 375         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 376                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 377                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 378                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 379                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 380                 }
 381
 382         }
 383 #ifndef OPENSSL_NO_COMP
 384
 385 static int sk_comp_cmp(const SSL_COMP * const *a,
 386                         const SSL_COMP * const *b)
 387         {
 388         return((*a)->id-(*b)->id);
 389         }
 390
 391 static void load_builtin_compressions(void)
 392         {
 393         int got_write_lock = 0;
 394
 395         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 396         if (ssl_comp_methods == NULL)
 397                 {
 398                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 399                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 400                 got_write_lock = 1;
 401
 402                 if (ssl_comp_methods == NULL)
 403                         {
 404                         SSL_COMP *comp = NULL;
 405
 406                         MemCheck_off();
 407                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 408                         if (ssl_comp_methods != NULL)
 409                                 {
 410                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 411                                 if (comp != NULL)
 412                                         {
 413                                         comp->method=COMP_zlib();
 414                                         if (comp->method
 415                                                 && comp->method->type == NID_undef)
 416                                                 OPENSSL_free(comp);
 417                                         else
 418                                                 {
 419                                                 comp->id=SSL_COMP_ZLIB_IDX;
 420                                                 comp->name=comp->method->name;
 421                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 422                                                 }
 423                                         }
 424                                 }
 425                         MemCheck_on();
 426                         }
 427                 }
 428
 429         if (got_write_lock)
 430                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 431         else
 432                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 433         }
 434 #endif
 435
 436 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 437              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 438         {
 439         int i;
 440         SSL_CIPHER *c;
 441
 442         c=s->cipher;
 443         if (c == NULL) return(0);
 444         if (comp != NULL)
 445                 {
 446                 SSL_COMP ctmp;
 447 #ifndef OPENSSL_NO_COMP
 448                 load_builtin_compressions();
 449 #endif
 450
 451                 *comp=NULL;
 452                 ctmp.id=s->compress_meth;
 453                 if (ssl_comp_methods != NULL)
 454                         {
 455                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 456                         if (i >= 0)
 457                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 458                         else
 459                                 *comp=NULL;
 460                         }
 461                 }
 462
 463         if ((enc == NULL) || (md == NULL)) return(0);
 464
 465         switch (c->algorithm_enc)
 466                 {
 467         case SSL_DES:
 468                 i=SSL_ENC_DES_IDX;
 469                 break;
 470         case SSL_3DES:
 471                 i=SSL_ENC_3DES_IDX;
 472                 break;
 473         case SSL_RC4:
 474                 i=SSL_ENC_RC4_IDX;
 475                 break;
 476         case SSL_RC2:
 477                 i=SSL_ENC_RC2_IDX;
 478                 break;
 479         case SSL_IDEA:
 480                 i=SSL_ENC_IDEA_IDX;
 481                 break;
 482         case SSL_eNULL:
 483                 i=SSL_ENC_NULL_IDX;
 484                 break;
 485         case SSL_AES128:
 486                 i=SSL_ENC_AES128_IDX;
 487                 break;
 488         case SSL_AES256:
 489                 i=SSL_ENC_AES256_IDX;
 490                 break;
 491         case SSL_CAMELLIA128:
 492                 i=SSL_ENC_CAMELLIA128_IDX;
 493                 break;
 494         case SSL_CAMELLIA256:
 495                 i=SSL_ENC_CAMELLIA256_IDX;
 496                 break;
 497         case SSL_eGOST2814789CNT:
 498                 i=SSL_ENC_GOST89_IDX;
 499                 break;
 500         case SSL_SEED:
 501                 i=SSL_ENC_SEED_IDX;
 502                 break;
 503         default:
 504                 i= -1;
 505                 break;
 506                 }
 507
 508         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 509                 *enc=NULL;
 510         else
 511                 {
 512                 if (i == SSL_ENC_NULL_IDX)
 513                         *enc=EVP_enc_null();
 514                 else
 515                         *enc=ssl_cipher_methods[i];
 516                 }
 517
 518         switch (c->algorithm_mac)
 519                 {
 520         case SSL_MD5:
 521                 i=SSL_MD_MD5_IDX;
 522                 break;
 523         case SSL_SHA1:
 524                 i=SSL_MD_SHA1_IDX;
 525                 break;
 526         case SSL_GOST94:
 527                 i = SSL_MD_GOST94_IDX;
 528                 break;
 529         case SSL_GOST89MAC:
 530                 i = SSL_MD_GOST89MAC_IDX;
 531                 break;
 532         default:
 533                 i= -1;
 534                 break;
 535                 }
 536         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 537         {
 538                 *md=NULL;
 539                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 540                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 541
 542         }
 543         else
 544         {
 545                 *md=ssl_digest_methods[i];
 546                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 547                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 548         }
 549
 550         if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef))
 551                 return(1);
 552         else
 553                 return(0);
 554         }
 555
 556 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 557 {
 558         if (idx <0||idx>=SSL_MD_NUM_IDX)
 559                 {
 560                 return 0;
 561                 }
 562         if (ssl_handshake_digest_flag[idx]==0) return 0;
 563         *mask = ssl_handshake_digest_flag[idx];
 564         *md = ssl_digest_methods[idx];
 565         return 1;
 566 }
 567
 568 #define ITEM_SEP(a) \
 569         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 570
 571 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 572              CIPHER_ORDER **tail)
 573         {
 574         if (curr == *tail) return;
 575         if (curr == *head)
 576                 *head=curr->next;
 577         if (curr->prev != NULL)
 578                 curr->prev->next=curr->next;
 579         if (curr->next != NULL)
 580                 curr->next->prev=curr->prev;
 581         (*tail)->next=curr;
 582         curr->prev= *tail;
 583         curr->next=NULL;
 584         *tail=curr;
 585         }
 586
 587 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 588              CIPHER_ORDER **tail)
 589         {
 590         if (curr == *head) return;
 591         if (curr == *tail)
 592                 *tail=curr->prev;
 593         if (curr->next != NULL)
 594                 curr->next->prev=curr->prev;
 595         if (curr->prev != NULL)
 596                 curr->prev->next=curr->next;
 597         (*head)->prev=curr;
 598         curr->next= *head;
 599         curr->prev=NULL;
 600         *head=curr;
 601         }
 602
 603 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 604         {
 605         *mkey = 0;
 606         *auth = 0;
 607         *enc = 0;
 608         *mac = 0;
 609         *ssl = 0;
 610
 611 #ifdef OPENSSL_NO_RSA
 612         *mkey |= SSL_kRSA;
 613         *auth |= SSL_aRSA;
 614 #endif
 615 #ifdef OPENSSL_NO_DSA
 616         *auth |= SSL_aDSS;
 617 #endif
 618         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 619         *auth |= SSL_aDH;
 620 #ifdef OPENSSL_NO_DH
 621         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 622         *auth |= SSL_aDH;
 623 #endif
 624 #ifdef OPENSSL_NO_KRB5
 625         *mkey |= SSL_kKRB5;
 626         *auth |= SSL_aKRB5;
 627 #endif
 628 #ifdef OPENSSL_NO_ECDSA
 629         *auth |= SSL_aECDSA;
 630 #endif
 631 #ifdef OPENSSL_NO_ECDH
 632         *mkey |= SSL_kECDHe|SSL_kECDHr;
 633         *auth |= SSL_aECDH;
 634 #endif
 635 #ifdef OPENSSL_NO_PSK
 636         *mkey |= SSL_kPSK;
 637         *auth |= SSL_aPSK;
 638 #endif
 639         /* Check for presence of GOST 34.10 algorithms, and if they
 640          * do not present, disable  appropriate auth and key exchange */
 641         if (!get_optional_pkey_id("gost94")) {
 642                 *auth |= SSL_aGOST94;
 643         }
 644         if (!get_optional_pkey_id("gost2001")) {
 645                 *auth |= SSL_aGOST01;
 646         }
 647         /* Disable GOST key exchange if no GOST signature algs are available * */
 648         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 649                 *mkey |= SSL_kGOST;
 650         }
 651 #ifdef SSL_FORBID_ENULL
 652         *enc |= SSL_eNULL;
 653 #endif
 654
 655
 656
 657         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 658         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 659         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 660         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 661         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 662         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 663         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 664         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 665         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 666         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 667         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 668
 669         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 670         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 671         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 672         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 673
 674         }
 675
 676 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 677                 int num_of_ciphers,
 678                 unsigned long disabled_mkey, unsigned long disabled_auth,
 679                 unsigned long disabled_enc, unsigned long disabled_mac,
 680                 unsigned long disabled_ssl,
 681                 CIPHER_ORDER *co_list,
 682                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 683         {
 684         int i, co_list_num;
 685         SSL_CIPHER *c;
 686
 687         /*
 688          * We have num_of_ciphers descriptions compiled in, depending on the
 689          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 690          * These will later be sorted in a linked list with at most num
 691          * entries.
 692          */
 693
 694         /* Get the initial list of ciphers */
 695         co_list_num = 0;        /* actual count of ciphers */
 696         for (i = 0; i < num_of_ciphers; i++)
 697                 {
 698                 c = ssl_method->get_cipher(i);
 699                 /* drop those that use any of that is not available */
 700                 if ((c != NULL) && c->valid &&
 701                     !(c->algorithm_mkey & disabled_mkey) &&
 702                     !(c->algorithm_auth & disabled_auth) &&
 703                     !(c->algorithm_enc & disabled_enc) &&
 704                     !(c->algorithm_mac & disabled_mac) &&
 705                     !(c->algorithm_ssl & disabled_ssl))
 706                         {
 707                         co_list[co_list_num].cipher = c;
 708                         co_list[co_list_num].next = NULL;
 709                         co_list[co_list_num].prev = NULL;
 710                         co_list[co_list_num].active = 0;
 711                         co_list_num++;
 712 #ifdef KSSL_DEBUG
 713                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 714 #endif  /* KSSL_DEBUG */
 715                         /*
 716                         if (!sk_push(ca_list,(char *)c)) goto err;
 717                         */
 718                         }
 719                 }
 720
 721         /*
 722          * Prepare linked list from list entries
 723          */
 724         if (co_list_num > 0)
 725                 {
 726                 co_list[0].prev = NULL;
 727
 728                 if (co_list_num > 1)
 729                         {
 730                         co_list[0].next = &co_list[1];
 731
 732                         for (i = 1; i < co_list_num - 1; i++)
 733                                 {
 734                                 co_list[i].prev = &co_list[i - 1];
 735                                 co_list[i].next = &co_list[i + 1];
 736                                 }
 737
 738                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 739                         }
 740
 741                 co_list[co_list_num - 1].next = NULL;
 742
 743                 *head_p = &co_list[0];
 744                 *tail_p = &co_list[co_list_num - 1];
 745                 }
 746         }
 747
 748 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
 749                         int num_of_group_aliases,
 750                         unsigned long disabled_mkey, unsigned long disabled_auth,
 751                         unsigned long disabled_enc, unsigned long disabled_mac,
 752                         unsigned long disabled_ssl,
 753                         CIPHER_ORDER *head)
 754         {
 755         CIPHER_ORDER *ciph_curr;
 756         SSL_CIPHER **ca_curr;
 757         int i;
 758         unsigned long mask_mkey = ~disabled_mkey;
 759         unsigned long mask_auth = ~disabled_auth;
 760         unsigned long mask_enc = ~disabled_enc;
 761         unsigned long mask_mac = ~disabled_mac;
 762         unsigned long mask_ssl = ~disabled_ssl;
 763
 764         /*
 765          * First, add the real ciphers as already collected
 766          */
 767         ciph_curr = head;
 768         ca_curr = ca_list;
 769         while (ciph_curr != NULL)
 770                 {
 771                 *ca_curr = ciph_curr->cipher;
 772                 ca_curr++;
 773                 ciph_curr = ciph_curr->next;
 774                 }
 775
 776         /*
 777          * Now we add the available ones from the cipher_aliases[] table.
 778          * They represent either one or more algorithms, some of which
 779          * in any affected category must be supported (set in enabled_mask),
 780          * or represent a cipher strength value (will be added in any case because algorithms=0).
 781          */
 782         for (i = 0; i < num_of_group_aliases; i++)
 783                 {
 784                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 785                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 786                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 787                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 788                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 789
 790                 if (algorithm_mkey)
 791                         if ((algorithm_mkey & mask_mkey) == 0)
 792                                 continue;
 793
 794                 if (algorithm_auth)
 795                         if ((algorithm_auth & mask_auth) == 0)
 796                                 continue;
 797
 798                 if (algorithm_enc)
 799                         if ((algorithm_enc & mask_enc) == 0)
 800                                 continue;
 801
 802                 if (algorithm_mac)
 803                         if ((algorithm_mac & mask_mac) == 0)
 804                                 continue;
 805
 806                 if (algorithm_ssl)
 807                         if ((algorithm_ssl & mask_ssl) == 0)
 808                                 continue;
 809
 810                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 811                 ca_curr++;
 812                 }
 813
 814         *ca_curr = NULL;        /* end of list */
 815         }
 816
 817 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 818                 unsigned long alg_mkey, unsigned long alg_auth,
 819                 unsigned long alg_enc, unsigned long alg_mac,
 820                 unsigned long alg_ssl,
 821                 unsigned long algo_strength,
 822                 int rule, int strength_bits,
 823                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 824         {
 825         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 826         SSL_CIPHER *cp;
 827         int reverse = 0;
 828
 829 #ifdef CIPHER_DEBUG
 830         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 831                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 832 #endif
 833
 834         if (rule == CIPHER_DEL)
 835                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 836
 837         head = *head_p;
 838         tail = *tail_p;
 839
 840         if (reverse)
 841                 {
 842                 curr = tail;
 843                 last = head;
 844                 }
 845         else
 846                 {
 847                 curr = head;
 848                 last = tail;
 849                 }
 850
 851         curr2 = curr;
 852         for (;;)
 853                 {
 854                 if ((curr == NULL) || (curr == last)) break;
 855                 curr = curr2;
 856                 curr2 = reverse ? curr->prev : curr->next;
 857
 858                 cp = curr->cipher;
 859
 860                 /*
 861                  * Selection criteria is either the value of strength_bits
 862                  * or the algorithms used.
 863                  */
 864                 if (strength_bits >= 0)
 865                         {
 866                         if (strength_bits != cp->strength_bits)
 867                                 continue;
 868                         }
 869                 else
 870                         {
 871 #ifdef CIPHER_DEBUG
 872                         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);
 873 #endif
 874
 875                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 876                                 continue;
 877                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 878                                 continue;
 879                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 880                                 continue;
 881                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 882                                 continue;
 883                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 884                                 continue;
 885                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 886                                 continue;
 887                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 888                                 continue;
 889                         }
 890
 891 #ifdef CIPHER_DEBUG
 892                 printf("Action = %d\n", rule);
 893 #endif
 894
 895                 /* add the cipher if it has not been added yet. */
 896                 if (rule == CIPHER_ADD)
 897                         {
 898                         /* reverse == 0 */
 899                         if (!curr->active)
 900                                 {
 901                                 ll_append_tail(&head, curr, &tail);
 902                                 curr->active = 1;
 903                                 }
 904                         }
 905                 /* Move the added cipher to this location */
 906                 else if (rule == CIPHER_ORD)
 907                         {
 908                         /* reverse == 0 */
 909                         if (curr->active)
 910                                 {
 911                                 ll_append_tail(&head, curr, &tail);
 912                                 }
 913                         }
 914                 else if (rule == CIPHER_DEL)
 915                         {
 916                         /* reverse == 1 */
 917                         if (curr->active)
 918                                 {
 919                                 /* most recently deleted ciphersuites get best positions
 920                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
 921                                  * works in reverse to maintain the order) */
 922                                 ll_append_head(&head, curr, &tail);
 923                                 curr->active = 0;
 924                                 }
 925                         }
 926                 else if (rule == CIPHER_KILL)
 927                         {
 928                         /* reverse == 0 */
 929                         if (head == curr)
 930                                 head = curr->next;
 931                         else
 932                                 curr->prev->next = curr->next;
 933                         if (tail == curr)
 934                                 tail = curr->prev;
 935                         curr->active = 0;
 936                         if (curr->next != NULL)
 937                                 curr->next->prev = curr->prev;
 938                         if (curr->prev != NULL)
 939                                 curr->prev->next = curr->next;
 940                         curr->next = NULL;
 941                         curr->prev = NULL;
 942                         }
 943                 }
 944
 945         *head_p = head;
 946         *tail_p = tail;
 947         }
 948
 949 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
 950                                     CIPHER_ORDER **tail_p)
 951         {
 952         int max_strength_bits, i, *number_uses;
 953         CIPHER_ORDER *curr;
 954
 955         /*
 956          * This routine sorts the ciphers with descending strength. The sorting
 957          * must keep the pre-sorted sequence, so we apply the normal sorting
 958          * routine as '+' movement to the end of the list.
 959          */
 960         max_strength_bits = 0;
 961         curr = *head_p;
 962         while (curr != NULL)
 963                 {
 964                 if (curr->active &&
 965                     (curr->cipher->strength_bits > max_strength_bits))
 966                     max_strength_bits = curr->cipher->strength_bits;
 967                 curr = curr->next;
 968                 }
 969
 970         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
 971         if (!number_uses)
 972                 {
 973                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
 974                 return(0);
 975                 }
 976         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
 977
 978         /*
 979          * Now find the strength_bits values actually used
 980          */
 981         curr = *head_p;
 982         while (curr != NULL)
 983                 {
 984                 if (curr->active)
 985                         number_uses[curr->cipher->strength_bits]++;
 986                 curr = curr->next;
 987                 }
 988         /*
 989          * Go through the list of used strength_bits values in descending
 990          * order.
 991          */
 992         for (i = max_strength_bits; i >= 0; i--)
 993                 if (number_uses[i] > 0)
 994                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
 995
 996         OPENSSL_free(number_uses);
 997         return(1);
 998         }
 999
1000 static int ssl_cipher_process_rulestr(const char *rule_str,
1001                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1002                 SSL_CIPHER **ca_list)
1003         {
1004         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1005         const char *l, *start, *buf;
1006         int j, multi, found, rule, retval, ok, buflen;
1007         unsigned long cipher_id = 0;
1008         char ch;
1009
1010         retval = 1;
1011         l = rule_str;
1012         for (;;)
1013                 {
1014                 ch = *l;
1015
1016                 if (ch == '\0')
1017                         break;          /* done */
1018                 if (ch == '-')
1019                         { rule = CIPHER_DEL; l++; }
1020                 else if (ch == '+')
1021                         { rule = CIPHER_ORD; l++; }
1022                 else if (ch == '!')
1023                         { rule = CIPHER_KILL; l++; }
1024                 else if (ch == '@')
1025                         { rule = CIPHER_SPECIAL; l++; }
1026                 else
1027                         { rule = CIPHER_ADD; }
1028
1029                 if (ITEM_SEP(ch))
1030                         {
1031                         l++;
1032                         continue;
1033                         }
1034
1035                 alg_mkey = 0;
1036                 alg_auth = 0;
1037                 alg_enc = 0;
1038                 alg_mac = 0;
1039                 alg_ssl = 0;
1040                 algo_strength = 0;
1041
1042                 start=l;
1043                 for (;;)
1044                         {
1045                         ch = *l;
1046                         buf = l;
1047                         buflen = 0;
1048 #ifndef CHARSET_EBCDIC
1049                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1050                                 ((ch >= '0') && (ch <= '9')) ||
1051                                 ((ch >= 'a') && (ch <= 'z')) ||
1052                                  (ch == '-'))
1053 #else
1054                         while ( isalnum(ch) || (ch == '-'))
1055 #endif
1056                                  {
1057                                  ch = *(++l);
1058                                  buflen++;
1059                                  }
1060
1061                         if (buflen == 0)
1062                                 {
1063                                 /*
1064                                  * We hit something we cannot deal with,
1065                                  * it is no command or separator nor
1066                                  * alphanumeric, so we call this an error.
1067                                  */
1068                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1069                                        SSL_R_INVALID_COMMAND);
1070                                 retval = found = 0;
1071                                 l++;
1072                                 break;
1073                                 }
1074
1075                         if (rule == CIPHER_SPECIAL)
1076                                 {
1077                                 found = 0; /* unused -- avoid compiler warning */
1078                                 break;  /* special treatment */
1079                                 }
1080
1081                         /* check for multi-part specification */
1082                         if (ch == '+')
1083                                 {
1084                                 multi=1;
1085                                 l++;
1086                                 }
1087                         else
1088                                 multi=0;
1089
1090                         /*
1091                          * Now search for the cipher alias in the ca_list. Be careful
1092                          * with the strncmp, because the "buflen" limitation
1093                          * will make the rule "ADH:SOME" and the cipher
1094                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1095                          * So additionally check whether the cipher name found
1096                          * has the correct length. We can save a strlen() call:
1097                          * just checking for the '\0' at the right place is
1098                          * sufficient, we have to strncmp() anyway. (We cannot
1099                          * use strcmp(), because buf is not '\0' terminated.)
1100                          */
1101                         j = found = 0;
1102                         cipher_id = 0;
1103                         while (ca_list[j])
1104                                 {
1105                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1106                                     (ca_list[j]->name[buflen] == '\0'))
1107                                         {
1108                                         found = 1;
1109                                         break;
1110                                         }
1111                                 else
1112                                         j++;
1113                                 }
1114
1115                         if (!found)
1116                                 break;  /* ignore this entry */
1117
1118                         if (ca_list[j]->algorithm_mkey)
1119                                 {
1120                                 if (alg_mkey)
1121                                         {
1122                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1123                                         if (!alg_mkey) { found = 0; break; }
1124                                         }
1125                                 else
1126                                         alg_mkey = ca_list[j]->algorithm_mkey;
1127                                 }
1128
1129                         if (ca_list[j]->algorithm_auth)
1130                                 {
1131                                 if (alg_auth)
1132                                         {
1133                                         alg_auth &= ca_list[j]->algorithm_auth;
1134                                         if (!alg_auth) { found = 0; break; }
1135                                         }
1136                                 else
1137                                         alg_auth = ca_list[j]->algorithm_auth;
1138                                 }
1139
1140                         if (ca_list[j]->algorithm_enc)
1141                                 {
1142                                 if (alg_enc)
1143                                         {
1144                                         alg_enc &= ca_list[j]->algorithm_enc;
1145                                         if (!alg_enc) { found = 0; break; }
1146                                         }
1147                                 else
1148                                         alg_enc = ca_list[j]->algorithm_enc;
1149                                 }
1150
1151                         if (ca_list[j]->algorithm_mac)
1152                                 {
1153                                 if (alg_mac)
1154                                         {
1155                                         alg_mac &= ca_list[j]->algorithm_mac;
1156                                         if (!alg_mac) { found = 0; break; }
1157                                         }
1158                                 else
1159                                         alg_mac = ca_list[j]->algorithm_mac;
1160                                 }
1161
1162                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1163                                 {
1164                                 if (algo_strength & SSL_EXP_MASK)
1165                                         {
1166                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1167                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1168                                         }
1169                                 else
1170                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1171                                 }
1172
1173                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1174                                 {
1175                                 if (algo_strength & SSL_STRONG_MASK)
1176                                         {
1177                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1178                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1179                                         }
1180                                 else
1181                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1182                                 }
1183
1184                         if (ca_list[j]->valid)
1185                                 {
1186                                 /* explicit ciphersuite found; its protocol version
1187                                  * does not become part of the search pattern!*/
1188
1189                                 cipher_id = ca_list[j]->id;
1190                                 }
1191                         else
1192                                 {
1193                                 /* not an explicit ciphersuite; only in this case, the
1194                                  * protocol version is considered part of the search pattern */
1195
1196                                 if (ca_list[j]->algorithm_ssl)
1197                                         {
1198                                         if (alg_ssl)
1199                                                 {
1200                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1201                                                 if (!alg_ssl) { found = 0; break; }
1202                                                 }
1203                                         else
1204                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1205                                         }
1206                                 }
1207
1208                         if (!multi) break;
1209                         }
1210
1211                 /*
1212                  * Ok, we have the rule, now apply it
1213                  */
1214                 if (rule == CIPHER_SPECIAL)
1215                         {       /* special command */
1216                         ok = 0;
1217                         if ((buflen == 8) &&
1218                                 !strncmp(buf, "STRENGTH", 8))
1219                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1220                         else
1221                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1222                                         SSL_R_INVALID_COMMAND);
1223                         if (ok == 0)
1224                                 retval = 0;
1225                         /*
1226                          * We do not support any "multi" options
1227                          * together with "@", so throw away the
1228                          * rest of the command, if any left, until
1229                          * end or ':' is found.
1230                          */
1231                         while ((*l != '\0') && !ITEM_SEP(*l))
1232                                 l++;
1233                         }
1234                 else if (found)
1235                         {
1236                         ssl_cipher_apply_rule(cipher_id,
1237                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1238                                 rule, -1, head_p, tail_p);
1239                         }
1240                 else
1241                         {
1242                         while ((*l != '\0') && !ITEM_SEP(*l))
1243                                 l++;
1244                         }
1245                 if (*l == '\0') break; /* done */
1246                 }
1247
1248         return(retval);
1249         }
1250
1251 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1252                 STACK_OF(SSL_CIPHER) **cipher_list,
1253                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1254                 const char *rule_str)
1255         {
1256         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1257         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1258         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1259         const char *rule_p;
1260         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1261         SSL_CIPHER **ca_list = NULL;
1262
1263         /*
1264          * Return with error if nothing to do.
1265          */
1266         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1267                 return NULL;
1268
1269         /*
1270          * To reduce the work to do we only want to process the compiled
1271          * in algorithms, so we first get the mask of disabled ciphers.
1272          */
1273         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1274
1275         /*
1276          * Now we have to collect the available ciphers from the compiled
1277          * in ciphers. We cannot get more than the number compiled in, so
1278          * it is used for allocation.
1279          */
1280         num_of_ciphers = ssl_method->num_ciphers();
1281 #ifdef KSSL_DEBUG
1282         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1283 #endif    /* KSSL_DEBUG */
1284         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1285         if (co_list == NULL)
1286                 {
1287                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1288                 return(NULL);   /* Failure */
1289                 }
1290
1291         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1292                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1293                                    co_list, &head, &tail);
1294
1295
1296         /* Now arrange all ciphers by preference: */
1297
1298         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1299         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1300         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1301
1302         /* AES is our preferred symmetric cipher */
1303         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1304
1305         /* Temporarily enable everything else for sorting */
1306         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1307
1308         /* Low priority for MD5 */
1309         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1310
1311         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1312          * (For applications that allow them, they aren't too bad, but we prefer
1313          * authenticated ciphers.) */
1314         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1315
1316         /* Move ciphers without forward secrecy to the end */
1317         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1318         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1319         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1320         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1321         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1322
1323         /* RC4 is sort-of broken -- move the the end */
1324         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1325
1326         /* Now sort by symmetric encryption strength.  The above ordering remains
1327          * in force within each class */
1328         if (!ssl_cipher_strength_sort(&head, &tail))
1329                 {
1330                 OPENSSL_free(co_list);
1331                 return NULL;
1332                 }
1333
1334         /* Now disable everything (maintaining the ordering!) */
1335         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1336
1337
1338         /*
1339          * We also need cipher aliases for selecting based on the rule_str.
1340          * There might be two types of entries in the rule_str: 1) names
1341          * of ciphers themselves 2) aliases for groups of ciphers.
1342          * For 1) we need the available ciphers and for 2) the cipher
1343          * groups of cipher_aliases added together in one list (otherwise
1344          * we would be happy with just the cipher_aliases table).
1345          */
1346         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1347         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1348         ca_list =
1349                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1350         if (ca_list == NULL)
1351                 {
1352                 OPENSSL_free(co_list);
1353                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1354                 return(NULL);   /* Failure */
1355                 }
1356         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1357                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1358                                    head);
1359
1360         /*
1361          * If the rule_string begins with DEFAULT, apply the default rule
1362          * before using the (possibly available) additional rules.
1363          */
1364         ok = 1;
1365         rule_p = rule_str;
1366         if (strncmp(rule_str,"DEFAULT",7) == 0)
1367                 {
1368                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1369                         &head, &tail, ca_list);
1370                 rule_p += 7;
1371                 if (*rule_p == ':')
1372                         rule_p++;
1373                 }
1374
1375         if (ok && (strlen(rule_p) > 0))
1376                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1377
1378         OPENSSL_free(ca_list);  /* Not needed anymore */
1379
1380         if (!ok)
1381                 {       /* Rule processing failure */
1382                 OPENSSL_free(co_list);
1383                 return(NULL);
1384                 }
1385
1386         /*
1387          * Allocate new "cipherstack" for the result, return with error
1388          * if we cannot get one.
1389          */
1390         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1391                 {
1392                 OPENSSL_free(co_list);
1393                 return(NULL);
1394                 }
1395
1396         /*
1397          * The cipher selection for the list is done. The ciphers are added
1398          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1399          */
1400         for (curr = head; curr != NULL; curr = curr->next)
1401                 {
1402                 if (curr->active)
1403                         {
1404                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1405 #ifdef CIPHER_DEBUG
1406                         printf("<%s>\n",curr->cipher->name);
1407 #endif
1408                         }
1409                 }
1410         OPENSSL_free(co_list);  /* Not needed any longer */
1411
1412         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1413         if (tmp_cipher_list == NULL)
1414                 {
1415                 sk_SSL_CIPHER_free(cipherstack);
1416                 return NULL;
1417                 }
1418         if (*cipher_list != NULL)
1419                 sk_SSL_CIPHER_free(*cipher_list);
1420         *cipher_list = cipherstack;
1421         if (*cipher_list_by_id != NULL)
1422                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1423         *cipher_list_by_id = tmp_cipher_list;
1424         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1425
1426         return(cipherstack);
1427         }
1428
1429 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1430         {
1431         int is_export,pkl,kl;
1432         const char *ver,*exp_str;
1433         const char *kx,*au,*enc,*mac;
1434         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1435 #ifdef KSSL_DEBUG
1436         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1437 #else
1438         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1439 #endif /* KSSL_DEBUG */
1440
1441         alg_mkey = cipher->algorithm_mkey;
1442         alg_auth = cipher->algorithm_auth;
1443         alg_enc = cipher->algorithm_enc;
1444         alg_mac = cipher->algorithm_mac;
1445         alg_ssl = cipher->algorithm_ssl;
1446
1447         alg_s=cipher->algo_strength;
1448         alg2=cipher->algorithm2;
1449
1450         is_export=SSL_C_IS_EXPORT(cipher);
1451         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1452         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1453         exp_str=is_export?" export":"";
1454
1455         if (alg_ssl & SSL_SSLV2)
1456                 ver="SSLv2";
1457         else if (alg_ssl & SSL_SSLV3)
1458                 ver="SSLv3";
1459         else
1460                 ver="unknown";
1461
1462         switch (alg_mkey)
1463                 {
1464         case SSL_kRSA:
1465                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1466                 break;
1467         case SSL_kDHr:
1468                 kx="DH/RSA";
1469                 break;
1470         case SSL_kDHd:
1471                 kx="DH/DSS";
1472                 break;
1473         case SSL_kKRB5:
1474                 kx="KRB5";
1475                 break;
1476         case SSL_kEDH:
1477                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1478                 break;
1479         case SSL_kECDHr:
1480                 kx="ECDH/RSA";
1481                 break;
1482         case SSL_kECDHe:
1483                 kx="ECDH/ECDSA";
1484                 break;
1485         case SSL_kEECDH:
1486                 kx="ECDH";
1487                 break;
1488         case SSL_kPSK:
1489                 kx="PSK";
1490                 break;
1491         default:
1492                 kx="unknown";
1493                 }
1494
1495         switch (alg_auth)
1496                 {
1497         case SSL_aRSA:
1498                 au="RSA";
1499                 break;
1500         case SSL_aDSS:
1501                 au="DSS";
1502                 break;
1503         case SSL_aDH:
1504                 au="DH";
1505                 break;
1506         case SSL_aKRB5:
1507                 au="KRB5";
1508                 break;
1509         case SSL_aECDH:
1510                 au="ECDH";
1511                 break;
1512         case SSL_aNULL:
1513                 au="None";
1514                 break;
1515         case SSL_aECDSA:
1516                 au="ECDSA";
1517                 break;
1518         case SSL_aPSK:
1519                 au="PSK";
1520                 break;
1521         default:
1522                 au="unknown";
1523                 break;
1524                 }
1525
1526         switch (alg_enc)
1527                 {
1528         case SSL_DES:
1529                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1530                 break;
1531         case SSL_3DES:
1532                 enc="3DES(168)";
1533                 break;
1534         case SSL_RC4:
1535                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1536                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1537                 break;
1538         case SSL_RC2:
1539                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1540                 break;
1541         case SSL_IDEA:
1542                 enc="IDEA(128)";
1543                 break;
1544         case SSL_eNULL:
1545                 enc="None";
1546                 break;
1547         case SSL_AES128:
1548                 enc="AES(128)";
1549                 break;
1550         case SSL_AES256:
1551                 enc="AES(256)";
1552                 break;
1553         case SSL_CAMELLIA128:
1554                 enc="Camellia(128)";
1555                 break;
1556         case SSL_CAMELLIA256:
1557                 enc="Camellia(256)";
1558                 break;
1559         case SSL_SEED:
1560                 enc="SEED(128)";
1561                 break;
1562         default:
1563                 enc="unknown";
1564                 break;
1565                 }
1566
1567         switch (alg_mac)
1568                 {
1569         case SSL_MD5:
1570                 mac="MD5";
1571                 break;
1572         case SSL_SHA1:
1573                 mac="SHA1";
1574                 break;
1575         default:
1576                 mac="unknown";
1577                 break;
1578                 }
1579
1580         if (buf == NULL)
1581                 {
1582                 len=128;
1583                 buf=OPENSSL_malloc(len);
1584                 if (buf == NULL) return("OPENSSL_malloc Error");
1585                 }
1586         else if (len < 128)
1587                 return("Buffer too small");
1588
1589 #ifdef KSSL_DEBUG
1590         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1591 #else
1592         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1593 #endif /* KSSL_DEBUG */
1594         return(buf);
1595         }
1596
1597 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1598         {
1599         int i;
1600
1601         if (c == NULL) return("(NONE)");
1602         i=(int)(c->id>>24L);
1603         if (i == 3)
1604                 return("TLSv1/SSLv3");
1605         else if (i == 2)
1606                 return("SSLv2");
1607         else
1608                 return("unknown");
1609         }
1610
1611 /* return the actual cipher being used */
1612 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1613         {
1614         if (c != NULL)
1615                 return(c->name);
1616         return("(NONE)");
1617         }
1618
1619 /* number of bits for symmetric cipher */
1620 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1621         {
1622         int ret=0;
1623
1624         if (c != NULL)
1625                 {
1626                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1627                 ret = c->strength_bits;
1628                 }
1629         return(ret);
1630         }
1631
1632 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1633         {
1634         SSL_COMP *ctmp;
1635         int i,nn;
1636
1637         if ((n == 0) || (sk == NULL)) return(NULL);
1638         nn=sk_SSL_COMP_num(sk);
1639         for (i=0; i<nn; i++)
1640                 {
1641                 ctmp=sk_SSL_COMP_value(sk,i);
1642                 if (ctmp->id == n)
1643                         return(ctmp);
1644                 }
1645         return(NULL);
1646         }
1647
1648 #ifdef OPENSSL_NO_COMP
1649 void *SSL_COMP_get_compression_methods(void)
1650         {
1651         return NULL;
1652         }
1653 int SSL_COMP_add_compression_method(int id, void *cm)
1654         {
1655         return 1;
1656         }
1657
1658 const char *SSL_COMP_get_name(const void *comp)
1659         {
1660         return NULL;
1661         }
1662 #else
1663 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1664         {
1665         load_builtin_compressions();
1666         return(ssl_comp_methods);
1667         }
1668
1669 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1670         {
1671         SSL_COMP *comp;
1672
1673         if (cm == NULL || cm->type == NID_undef)
1674                 return 1;
1675
1676         /* According to draft-ietf-tls-compression-04.txt, the
1677            compression number ranges should be the following:
1678
1679            0 to 63:    methods defined by the IETF
1680            64 to 192:  external party methods assigned by IANA
1681            193 to 255: reserved for private use */
1682         if (id < 193 || id > 255)
1683                 {
1684                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1685                 return 0;
1686                 }
1687
1688         MemCheck_off();
1689         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1690         comp->id=id;
1691         comp->method=cm;
1692         load_builtin_compressions();
1693         if (ssl_comp_methods
1694                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1695                 {
1696                 OPENSSL_free(comp);
1697                 MemCheck_on();
1698                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1699                 return(1);
1700                 }
1701         else if ((ssl_comp_methods == NULL)
1702                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1703                 {
1704                 OPENSSL_free(comp);
1705                 MemCheck_on();
1706                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1707                 return(1);
1708                 }
1709         else
1710                 {
1711                 MemCheck_on();
1712                 return(0);
1713                 }
1714         }
1715
1716 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1717         {
1718         if (comp)
1719                 return comp->name;
1720         return NULL;
1721         }
1722
1723 #endif