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 #ifndef OPENSSL_NO_COMP
 146 #include <openssl/comp.h>
 147 #endif
 148 #ifndef OPENSSL_NO_ENGINE
 149 #include <openssl/engine.h>
 150 #endif
 151 #include "ssl_locl.h"
 152
 153 #define SSL_ENC_DES_IDX         0
 154 #define SSL_ENC_3DES_IDX        1
 155 #define SSL_ENC_RC4_IDX         2
 156 #define SSL_ENC_RC2_IDX         3
 157 #define SSL_ENC_IDEA_IDX        4
 158 #define SSL_ENC_NULL_IDX        5
 159 #define SSL_ENC_AES128_IDX      6
 160 #define SSL_ENC_AES256_IDX      7
 161 #define SSL_ENC_CAMELLIA128_IDX 8
 162 #define SSL_ENC_CAMELLIA256_IDX 9
 163 #define SSL_ENC_GOST89_IDX      10
 164 #define SSL_ENC_SEED_IDX        11
 165 #define SSL_ENC_NUM_IDX         12
 166
 167
 168 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
 169         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 170         };
 171
 172 #define SSL_COMP_NULL_IDX       0
 173 #define SSL_COMP_ZLIB_IDX       1
 174 #define SSL_COMP_NUM_IDX        2
 175
 176 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
 177
 178 #define SSL_MD_MD5_IDX  0
 179 #define SSL_MD_SHA1_IDX 1
 180 #define SSL_MD_GOST94_IDX 2
 181 #define SSL_MD_GOST89MAC_IDX 3
 182 #define SSL_MD_SHA256_IDX 4
 183 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
 184  * defined in the
 185  * ssl_locl.h */
 186 #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST
 187 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
 188         NULL,NULL,NULL,NULL,NULL
 189         };
 190 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
 191  * implementation is engine-provided, we'll fill it only if
 192  * corresponding EVP_PKEY_METHOD is found
 193  */
 194 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
 195         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,EVP_PKEY_HMAC
 196         };
 197
 198 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
 199         0,0,0,0,0
 200         };
 201
 202 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
 203         SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
 204         SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256
 205         };
 206
 207 #define CIPHER_ADD      1
 208 #define CIPHER_KILL     2
 209 #define CIPHER_DEL      3
 210 #define CIPHER_ORD      4
 211 #define CIPHER_SPECIAL  5
 212
 213 typedef struct cipher_order_st
 214         {
 215         const SSL_CIPHER *cipher;
 216         int active;
 217         int dead;
 218         struct cipher_order_st *next,*prev;
 219         } CIPHER_ORDER;
 220
 221 static const SSL_CIPHER cipher_aliases[]={
 222         /* "ALL" doesn't include eNULL (must be specifically enabled) */
 223         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
 224         /* "COMPLEMENTOFALL" */
 225         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
 226
 227         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
 228         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
 229
 230         /* key exchange aliases
 231          * (some of those using only a single bit here combine
 232          * multiple key exchange algs according to the RFCs,
 233          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
 234         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
 235
 236         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 237         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 238         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 239         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 240         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 241
 242         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 243
 244         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 245         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 246         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 247         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 248         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 249
 250         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 251         {0,SSL_TXT_kSRP,0,    SSL_kSRP,  0,0,0,0,0,0,0,0},
 252         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
 253
 254         /* server authentication aliases */
 255         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 256         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 257         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 258         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 259         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 260         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 261         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 262         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 263         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 264         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 265         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
 266         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
 267         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
 268
 269         /* aliases combining key exchange and server authentication */
 270         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 271         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 272         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 273         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 274         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 275         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 276         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 277         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 278         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
 279
 280
 281         /* symmetric encryption aliases */
 282         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 283         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 284         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 285         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 286         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 287         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 288         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 289         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
 290         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
 291         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
 292         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 293         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 294         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 295
 296         /* MAC aliases */
 297         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 298         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 299         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 300         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 301         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 302         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
 303
 304         /* protocol version aliases */
 305         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 306         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 307         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 308
 309         /* export flag */
 310         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 311         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 312
 313         /* strength classes */
 314         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 315         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 316         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 317         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 318         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 319         /* FIPS 140-2 approved ciphersuite */
 320         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
 321         };
 322 /* Search for public key algorithm with given name and
 323  * return its pkey_id if it is available. Otherwise return 0
 324  */
 325 #ifdef OPENSSL_NO_ENGINE
 326
 327 static int get_optional_pkey_id(const char *pkey_name)
 328         {
 329         const EVP_PKEY_ASN1_METHOD *ameth;
 330         int pkey_id=0;
 331         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
 332         if (ameth)
 333                 {
 334                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 335                 }
 336         return pkey_id;
 337         }
 338
 339 #else
 340
 341 static int get_optional_pkey_id(const char *pkey_name)
 342         {
 343         const EVP_PKEY_ASN1_METHOD *ameth;
 344         ENGINE *tmpeng = NULL;
 345         int pkey_id=0;
 346         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 347         if (ameth)
 348                 {
 349                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 350                 }
 351         if (tmpeng) ENGINE_finish(tmpeng);
 352         return pkey_id;
 353         }
 354
 355 #endif
 356
 357 void ssl_load_ciphers(void)
 358         {
 359         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 360                 EVP_get_cipherbyname(SN_des_cbc);
 361         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 362                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 363         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 364                 EVP_get_cipherbyname(SN_rc4);
 365         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 366                 EVP_get_cipherbyname(SN_rc2_cbc);
 367 #ifndef OPENSSL_NO_IDEA
 368         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 369                 EVP_get_cipherbyname(SN_idea_cbc);
 370 #else
 371         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 372 #endif
 373         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 374           EVP_get_cipherbyname(SN_aes_128_cbc);
 375         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 376           EVP_get_cipherbyname(SN_aes_256_cbc);
 377         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 378           EVP_get_cipherbyname(SN_camellia_128_cbc);
 379         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 380           EVP_get_cipherbyname(SN_camellia_256_cbc);
 381         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 382           EVP_get_cipherbyname(SN_gost89_cnt);
 383         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 384           EVP_get_cipherbyname(SN_seed_cbc);
 385
 386         ssl_digest_methods[SSL_MD_MD5_IDX]=
 387                 EVP_get_digestbyname(SN_md5);
 388         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 389                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 390         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
 391         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 392                 EVP_get_digestbyname(SN_sha1);
 393         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 394                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 395         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
 396         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 397                 EVP_get_digestbyname(SN_id_GostR3411_94);
 398         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 399                 {
 400                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 401                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 402                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
 403                 }
 404         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 405                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 406                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 407                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 408                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 409                 }
 410
 411         ssl_digest_methods[SSL_MD_SHA256_IDX]=
 412                 EVP_get_digestbyname(SN_sha256);
 413         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
 414                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
 415         }
 416 #ifndef OPENSSL_NO_COMP
 417
 418 static int sk_comp_cmp(const SSL_COMP * const *a,
 419                         const SSL_COMP * const *b)
 420         {
 421         return((*a)->id-(*b)->id);
 422         }
 423
 424 static void load_builtin_compressions(void)
 425         {
 426         int got_write_lock = 0;
 427
 428         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 429         if (ssl_comp_methods == NULL)
 430                 {
 431                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 432                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 433                 got_write_lock = 1;
 434
 435                 if (ssl_comp_methods == NULL)
 436                         {
 437                         SSL_COMP *comp = NULL;
 438
 439                         MemCheck_off();
 440                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 441                         if (ssl_comp_methods != NULL)
 442                                 {
 443                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 444                                 if (comp != NULL)
 445                                         {
 446                                         comp->method=COMP_zlib();
 447                                         if (comp->method
 448                                                 && comp->method->type == NID_undef)
 449                                                 OPENSSL_free(comp);
 450                                         else
 451                                                 {
 452                                                 comp->id=SSL_COMP_ZLIB_IDX;
 453                                                 comp->name=comp->method->name;
 454                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 455                                                 }
 456                                         }
 457                                 }
 458                         MemCheck_on();
 459                         }
 460                 }
 461
 462         if (got_write_lock)
 463                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 464         else
 465                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 466         }
 467 #endif
 468
 469 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 470              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 471         {
 472         int i;
 473         const SSL_CIPHER *c;
 474
 475         c=s->cipher;
 476         if (c == NULL) return(0);
 477         if (comp != NULL)
 478                 {
 479                 SSL_COMP ctmp;
 480 #ifndef OPENSSL_NO_COMP
 481                 load_builtin_compressions();
 482 #endif
 483
 484                 *comp=NULL;
 485                 ctmp.id=s->compress_meth;
 486                 if (ssl_comp_methods != NULL)
 487                         {
 488                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 489                         if (i >= 0)
 490                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 491                         else
 492                                 *comp=NULL;
 493                         }
 494                 }
 495
 496         if ((enc == NULL) || (md == NULL)) return(0);
 497
 498         switch (c->algorithm_enc)
 499                 {
 500         case SSL_DES:
 501                 i=SSL_ENC_DES_IDX;
 502                 break;
 503         case SSL_3DES:
 504                 i=SSL_ENC_3DES_IDX;
 505                 break;
 506         case SSL_RC4:
 507                 i=SSL_ENC_RC4_IDX;
 508                 break;
 509         case SSL_RC2:
 510                 i=SSL_ENC_RC2_IDX;
 511                 break;
 512         case SSL_IDEA:
 513                 i=SSL_ENC_IDEA_IDX;
 514                 break;
 515         case SSL_eNULL:
 516                 i=SSL_ENC_NULL_IDX;
 517                 break;
 518         case SSL_AES128:
 519                 i=SSL_ENC_AES128_IDX;
 520                 break;
 521         case SSL_AES256:
 522                 i=SSL_ENC_AES256_IDX;
 523                 break;
 524         case SSL_CAMELLIA128:
 525                 i=SSL_ENC_CAMELLIA128_IDX;
 526                 break;
 527         case SSL_CAMELLIA256:
 528                 i=SSL_ENC_CAMELLIA256_IDX;
 529                 break;
 530         case SSL_eGOST2814789CNT:
 531                 i=SSL_ENC_GOST89_IDX;
 532                 break;
 533         case SSL_SEED:
 534                 i=SSL_ENC_SEED_IDX;
 535                 break;
 536         default:
 537                 i= -1;
 538                 break;
 539                 }
 540
 541         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 542                 *enc=NULL;
 543         else
 544                 {
 545                 if (i == SSL_ENC_NULL_IDX)
 546                         *enc=EVP_enc_null();
 547                 else
 548                         *enc=ssl_cipher_methods[i];
 549                 }
 550
 551         switch (c->algorithm_mac)
 552                 {
 553         case SSL_MD5:
 554                 i=SSL_MD_MD5_IDX;
 555                 break;
 556         case SSL_SHA1:
 557                 i=SSL_MD_SHA1_IDX;
 558                 break;
 559         case SSL_SHA256:
 560                 i=SSL_MD_SHA256_IDX;
 561                 break;
 562         case SSL_GOST94:
 563                 i = SSL_MD_GOST94_IDX;
 564                 break;
 565         case SSL_GOST89MAC:
 566                 i = SSL_MD_GOST89MAC_IDX;
 567                 break;
 568         default:
 569                 i= -1;
 570                 break;
 571                 }
 572         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 573         {
 574                 *md=NULL;
 575                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 576                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 577
 578         }
 579         else
 580         {
 581                 *md=ssl_digest_methods[i];
 582                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 583                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 584         }
 585
 586         if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef))
 587                 return(1);
 588         else
 589                 return(0);
 590         }
 591
 592 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 593 {
 594         if (idx <0||idx>=SSL_MD_NUM_IDX)
 595                 {
 596                 return 0;
 597                 }
 598         *mask = ssl_handshake_digest_flag[idx];
 599         if (*mask)
 600                 *md = ssl_digest_methods[idx];
 601         else
 602                 *md = NULL;
 603         return 1;
 604 }
 605
 606 #define ITEM_SEP(a) \
 607         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 608
 609 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 610              CIPHER_ORDER **tail)
 611         {
 612         if (curr == *tail) return;
 613         if (curr == *head)
 614                 *head=curr->next;
 615         if (curr->prev != NULL)
 616                 curr->prev->next=curr->next;
 617         if (curr->next != NULL)
 618                 curr->next->prev=curr->prev;
 619         (*tail)->next=curr;
 620         curr->prev= *tail;
 621         curr->next=NULL;
 622         *tail=curr;
 623         }
 624
 625 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 626              CIPHER_ORDER **tail)
 627         {
 628         if (curr == *head) return;
 629         if (curr == *tail)
 630                 *tail=curr->prev;
 631         if (curr->next != NULL)
 632                 curr->next->prev=curr->prev;
 633         if (curr->prev != NULL)
 634                 curr->prev->next=curr->next;
 635         (*head)->prev=curr;
 636         curr->next= *head;
 637         curr->prev=NULL;
 638         *head=curr;
 639         }
 640
 641 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 642         {
 643         *mkey = 0;
 644         *auth = 0;
 645         *enc = 0;
 646         *mac = 0;
 647         *ssl = 0;
 648
 649 #ifdef OPENSSL_NO_RSA
 650         *mkey |= SSL_kRSA;
 651         *auth |= SSL_aRSA;
 652 #endif
 653 #ifdef OPENSSL_NO_DSA
 654         *auth |= SSL_aDSS;
 655 #endif
 656         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 657         *auth |= SSL_aDH;
 658 #ifdef OPENSSL_NO_DH
 659         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 660         *auth |= SSL_aDH;
 661 #endif
 662 #ifdef OPENSSL_NO_KRB5
 663         *mkey |= SSL_kKRB5;
 664         *auth |= SSL_aKRB5;
 665 #endif
 666 #ifdef OPENSSL_NO_ECDSA
 667         *auth |= SSL_aECDSA;
 668 #endif
 669 #ifdef OPENSSL_NO_ECDH
 670         *mkey |= SSL_kECDHe|SSL_kECDHr;
 671         *auth |= SSL_aECDH;
 672 #endif
 673 #ifdef OPENSSL_NO_PSK
 674         *mkey |= SSL_kPSK;
 675         *auth |= SSL_aPSK;
 676 #endif
 677 #ifdef OPENSSL_NO_SRP
 678         *mkey |= SSL_kSRP;
 679 #endif
 680         /* Check for presence of GOST 34.10 algorithms, and if they
 681          * do not present, disable  appropriate auth and key exchange */
 682         if (!get_optional_pkey_id("gost94")) {
 683                 *auth |= SSL_aGOST94;
 684         }
 685         if (!get_optional_pkey_id("gost2001")) {
 686                 *auth |= SSL_aGOST01;
 687         }
 688         /* Disable GOST key exchange if no GOST signature algs are available * */
 689         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 690                 *mkey |= SSL_kGOST;
 691         }
 692 #ifdef SSL_FORBID_ENULL
 693         *enc |= SSL_eNULL;
 694 #endif
 695
 696
 697
 698         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 699         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 700         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 701         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 702         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 703         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 704         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 705         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 706         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 707         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 708         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 709
 710         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 711         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 712         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 713         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 714
 715         }
 716
 717 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 718                 int num_of_ciphers,
 719                 unsigned long disabled_mkey, unsigned long disabled_auth,
 720                 unsigned long disabled_enc, unsigned long disabled_mac,
 721                 unsigned long disabled_ssl,
 722                 CIPHER_ORDER *co_list,
 723                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 724         {
 725         int i, co_list_num;
 726         const SSL_CIPHER *c;
 727
 728         /*
 729          * We have num_of_ciphers descriptions compiled in, depending on the
 730          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 731          * These will later be sorted in a linked list with at most num
 732          * entries.
 733          */
 734
 735         /* Get the initial list of ciphers */
 736         co_list_num = 0;        /* actual count of ciphers */
 737         for (i = 0; i < num_of_ciphers; i++)
 738                 {
 739                 c = ssl_method->get_cipher(i);
 740                 /* drop those that use any of that is not available */
 741                 if ((c != NULL) && c->valid &&
 742                     !(c->algorithm_mkey & disabled_mkey) &&
 743                     !(c->algorithm_auth & disabled_auth) &&
 744                     !(c->algorithm_enc & disabled_enc) &&
 745                     !(c->algorithm_mac & disabled_mac) &&
 746                     !(c->algorithm_ssl & disabled_ssl))
 747                         {
 748                         co_list[co_list_num].cipher = c;
 749                         co_list[co_list_num].next = NULL;
 750                         co_list[co_list_num].prev = NULL;
 751                         co_list[co_list_num].active = 0;
 752                         co_list_num++;
 753 #ifdef KSSL_DEBUG
 754                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 755 #endif  /* KSSL_DEBUG */
 756                         /*
 757                         if (!sk_push(ca_list,(char *)c)) goto err;
 758                         */
 759                         }
 760                 }
 761
 762         /*
 763          * Prepare linked list from list entries
 764          */
 765         if (co_list_num > 0)
 766                 {
 767                 co_list[0].prev = NULL;
 768
 769                 if (co_list_num > 1)
 770                         {
 771                         co_list[0].next = &co_list[1];
 772
 773                         for (i = 1; i < co_list_num - 1; i++)
 774                                 {
 775                                 co_list[i].prev = &co_list[i - 1];
 776                                 co_list[i].next = &co_list[i + 1];
 777                                 }
 778
 779                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 780                         }
 781
 782                 co_list[co_list_num - 1].next = NULL;
 783
 784                 *head_p = &co_list[0];
 785                 *tail_p = &co_list[co_list_num - 1];
 786                 }
 787         }
 788
 789 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
 790                         int num_of_group_aliases,
 791                         unsigned long disabled_mkey, unsigned long disabled_auth,
 792                         unsigned long disabled_enc, unsigned long disabled_mac,
 793                         unsigned long disabled_ssl,
 794                         CIPHER_ORDER *head)
 795         {
 796         CIPHER_ORDER *ciph_curr;
 797         const SSL_CIPHER **ca_curr;
 798         int i;
 799         unsigned long mask_mkey = ~disabled_mkey;
 800         unsigned long mask_auth = ~disabled_auth;
 801         unsigned long mask_enc = ~disabled_enc;
 802         unsigned long mask_mac = ~disabled_mac;
 803         unsigned long mask_ssl = ~disabled_ssl;
 804
 805         /*
 806          * First, add the real ciphers as already collected
 807          */
 808         ciph_curr = head;
 809         ca_curr = ca_list;
 810         while (ciph_curr != NULL)
 811                 {
 812                 *ca_curr = ciph_curr->cipher;
 813                 ca_curr++;
 814                 ciph_curr = ciph_curr->next;
 815                 }
 816
 817         /*
 818          * Now we add the available ones from the cipher_aliases[] table.
 819          * They represent either one or more algorithms, some of which
 820          * in any affected category must be supported (set in enabled_mask),
 821          * or represent a cipher strength value (will be added in any case because algorithms=0).
 822          */
 823         for (i = 0; i < num_of_group_aliases; i++)
 824                 {
 825                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 826                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 827                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 828                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 829                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 830
 831                 if (algorithm_mkey)
 832                         if ((algorithm_mkey & mask_mkey) == 0)
 833                                 continue;
 834
 835                 if (algorithm_auth)
 836                         if ((algorithm_auth & mask_auth) == 0)
 837                                 continue;
 838
 839                 if (algorithm_enc)
 840                         if ((algorithm_enc & mask_enc) == 0)
 841                                 continue;
 842
 843                 if (algorithm_mac)
 844                         if ((algorithm_mac & mask_mac) == 0)
 845                                 continue;
 846
 847                 if (algorithm_ssl)
 848                         if ((algorithm_ssl & mask_ssl) == 0)
 849                                 continue;
 850
 851                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 852                 ca_curr++;
 853                 }
 854
 855         *ca_curr = NULL;        /* end of list */
 856         }
 857
 858 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 859                 unsigned long alg_mkey, unsigned long alg_auth,
 860                 unsigned long alg_enc, unsigned long alg_mac,
 861                 unsigned long alg_ssl,
 862                 unsigned long algo_strength,
 863                 int rule, int strength_bits,
 864                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 865         {
 866         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 867         const SSL_CIPHER *cp;
 868         int reverse = 0;
 869
 870 #ifdef CIPHER_DEBUG
 871         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 872                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 873 #endif
 874
 875         if (rule == CIPHER_DEL)
 876                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 877
 878         head = *head_p;
 879         tail = *tail_p;
 880
 881         if (reverse)
 882                 {
 883                 curr = tail;
 884                 last = head;
 885                 }
 886         else
 887                 {
 888                 curr = head;
 889                 last = tail;
 890                 }
 891
 892         curr2 = curr;
 893         for (;;)
 894                 {
 895                 if ((curr == NULL) || (curr == last)) break;
 896                 curr = curr2;
 897                 curr2 = reverse ? curr->prev : curr->next;
 898
 899                 cp = curr->cipher;
 900
 901                 /*
 902                  * Selection criteria is either the value of strength_bits
 903                  * or the algorithms used.
 904                  */
 905                 if (strength_bits >= 0)
 906                         {
 907                         if (strength_bits != cp->strength_bits)
 908                                 continue;
 909                         }
 910                 else
 911                         {
 912 #ifdef CIPHER_DEBUG
 913                         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);
 914 #endif
 915
 916                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 917                                 continue;
 918                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 919                                 continue;
 920                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 921                                 continue;
 922                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 923                                 continue;
 924                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 925                                 continue;
 926                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 927                                 continue;
 928                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 929                                 continue;
 930                         }
 931
 932 #ifdef CIPHER_DEBUG
 933                 printf("Action = %d\n", rule);
 934 #endif
 935
 936                 /* add the cipher if it has not been added yet. */
 937                 if (rule == CIPHER_ADD)
 938                         {
 939                         /* reverse == 0 */
 940                         if (!curr->active)
 941                                 {
 942                                 ll_append_tail(&head, curr, &tail);
 943                                 curr->active = 1;
 944                                 }
 945                         }
 946                 /* Move the added cipher to this location */
 947                 else if (rule == CIPHER_ORD)
 948                         {
 949                         /* reverse == 0 */
 950                         if (curr->active)
 951                                 {
 952                                 ll_append_tail(&head, curr, &tail);
 953                                 }
 954                         }
 955                 else if (rule == CIPHER_DEL)
 956                         {
 957                         /* reverse == 1 */
 958                         if (curr->active)
 959                                 {
 960                                 /* most recently deleted ciphersuites get best positions
 961                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
 962                                  * works in reverse to maintain the order) */
 963                                 ll_append_head(&head, curr, &tail);
 964                                 curr->active = 0;
 965                                 }
 966                         }
 967                 else if (rule == CIPHER_KILL)
 968                         {
 969                         /* reverse == 0 */
 970                         if (head == curr)
 971                                 head = curr->next;
 972                         else
 973                                 curr->prev->next = curr->next;
 974                         if (tail == curr)
 975                                 tail = curr->prev;
 976                         curr->active = 0;
 977                         if (curr->next != NULL)
 978                                 curr->next->prev = curr->prev;
 979                         if (curr->prev != NULL)
 980                                 curr->prev->next = curr->next;
 981                         curr->next = NULL;
 982                         curr->prev = NULL;
 983                         }
 984                 }
 985
 986         *head_p = head;
 987         *tail_p = tail;
 988         }
 989
 990 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
 991                                     CIPHER_ORDER **tail_p)
 992         {
 993         int max_strength_bits, i, *number_uses;
 994         CIPHER_ORDER *curr;
 995
 996         /*
 997          * This routine sorts the ciphers with descending strength. The sorting
 998          * must keep the pre-sorted sequence, so we apply the normal sorting
 999          * routine as '+' movement to the end of the list.
1000          */
1001         max_strength_bits = 0;
1002         curr = *head_p;
1003         while (curr != NULL)
1004                 {
1005                 if (curr->active &&
1006                     (curr->cipher->strength_bits > max_strength_bits))
1007                     max_strength_bits = curr->cipher->strength_bits;
1008                 curr = curr->next;
1009                 }
1010
1011         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1012         if (!number_uses)
1013                 {
1014                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1015                 return(0);
1016                 }
1017         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1018
1019         /*
1020          * Now find the strength_bits values actually used
1021          */
1022         curr = *head_p;
1023         while (curr != NULL)
1024                 {
1025                 if (curr->active)
1026                         number_uses[curr->cipher->strength_bits]++;
1027                 curr = curr->next;
1028                 }
1029         /*
1030          * Go through the list of used strength_bits values in descending
1031          * order.
1032          */
1033         for (i = max_strength_bits; i >= 0; i--)
1034                 if (number_uses[i] > 0)
1035                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1036
1037         OPENSSL_free(number_uses);
1038         return(1);
1039         }
1040
1041 static int ssl_cipher_process_rulestr(const char *rule_str,
1042                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1043                 const SSL_CIPHER **ca_list)
1044         {
1045         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1046         const char *l, *buf;
1047         int j, multi, found, rule, retval, ok, buflen;
1048         unsigned long cipher_id = 0;
1049         char ch;
1050
1051         retval = 1;
1052         l = rule_str;
1053         for (;;)
1054                 {
1055                 ch = *l;
1056
1057                 if (ch == '\0')
1058                         break;          /* done */
1059                 if (ch == '-')
1060                         { rule = CIPHER_DEL; l++; }
1061                 else if (ch == '+')
1062                         { rule = CIPHER_ORD; l++; }
1063                 else if (ch == '!')
1064                         { rule = CIPHER_KILL; l++; }
1065                 else if (ch == '@')
1066                         { rule = CIPHER_SPECIAL; l++; }
1067                 else
1068                         { rule = CIPHER_ADD; }
1069
1070                 if (ITEM_SEP(ch))
1071                         {
1072                         l++;
1073                         continue;
1074                         }
1075
1076                 alg_mkey = 0;
1077                 alg_auth = 0;
1078                 alg_enc = 0;
1079                 alg_mac = 0;
1080                 alg_ssl = 0;
1081                 algo_strength = 0;
1082
1083                 for (;;)
1084                         {
1085                         ch = *l;
1086                         buf = l;
1087                         buflen = 0;
1088 #ifndef CHARSET_EBCDIC
1089                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1090                                 ((ch >= '0') && (ch <= '9')) ||
1091                                 ((ch >= 'a') && (ch <= 'z')) ||
1092                                  (ch == '-'))
1093 #else
1094                         while ( isalnum(ch) || (ch == '-'))
1095 #endif
1096                                  {
1097                                  ch = *(++l);
1098                                  buflen++;
1099                                  }
1100
1101                         if (buflen == 0)
1102                                 {
1103                                 /*
1104                                  * We hit something we cannot deal with,
1105                                  * it is no command or separator nor
1106                                  * alphanumeric, so we call this an error.
1107                                  */
1108                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1109                                        SSL_R_INVALID_COMMAND);
1110                                 retval = found = 0;
1111                                 l++;
1112                                 break;
1113                                 }
1114
1115                         if (rule == CIPHER_SPECIAL)
1116                                 {
1117                                 found = 0; /* unused -- avoid compiler warning */
1118                                 break;  /* special treatment */
1119                                 }
1120
1121                         /* check for multi-part specification */
1122                         if (ch == '+')
1123                                 {
1124                                 multi=1;
1125                                 l++;
1126                                 }
1127                         else
1128                                 multi=0;
1129
1130                         /*
1131                          * Now search for the cipher alias in the ca_list. Be careful
1132                          * with the strncmp, because the "buflen" limitation
1133                          * will make the rule "ADH:SOME" and the cipher
1134                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1135                          * So additionally check whether the cipher name found
1136                          * has the correct length. We can save a strlen() call:
1137                          * just checking for the '\0' at the right place is
1138                          * sufficient, we have to strncmp() anyway. (We cannot
1139                          * use strcmp(), because buf is not '\0' terminated.)
1140                          */
1141                         j = found = 0;
1142                         cipher_id = 0;
1143                         while (ca_list[j])
1144                                 {
1145                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1146                                     (ca_list[j]->name[buflen] == '\0'))
1147                                         {
1148                                         found = 1;
1149                                         break;
1150                                         }
1151                                 else
1152                                         j++;
1153                                 }
1154
1155                         if (!found)
1156                                 break;  /* ignore this entry */
1157
1158                         if (ca_list[j]->algorithm_mkey)
1159                                 {
1160                                 if (alg_mkey)
1161                                         {
1162                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1163                                         if (!alg_mkey) { found = 0; break; }
1164                                         }
1165                                 else
1166                                         alg_mkey = ca_list[j]->algorithm_mkey;
1167                                 }
1168
1169                         if (ca_list[j]->algorithm_auth)
1170                                 {
1171                                 if (alg_auth)
1172                                         {
1173                                         alg_auth &= ca_list[j]->algorithm_auth;
1174                                         if (!alg_auth) { found = 0; break; }
1175                                         }
1176                                 else
1177                                         alg_auth = ca_list[j]->algorithm_auth;
1178                                 }
1179
1180                         if (ca_list[j]->algorithm_enc)
1181                                 {
1182                                 if (alg_enc)
1183                                         {
1184                                         alg_enc &= ca_list[j]->algorithm_enc;
1185                                         if (!alg_enc) { found = 0; break; }
1186                                         }
1187                                 else
1188                                         alg_enc = ca_list[j]->algorithm_enc;
1189                                 }
1190
1191                         if (ca_list[j]->algorithm_mac)
1192                                 {
1193                                 if (alg_mac)
1194                                         {
1195                                         alg_mac &= ca_list[j]->algorithm_mac;
1196                                         if (!alg_mac) { found = 0; break; }
1197                                         }
1198                                 else
1199                                         alg_mac = ca_list[j]->algorithm_mac;
1200                                 }
1201
1202                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1203                                 {
1204                                 if (algo_strength & SSL_EXP_MASK)
1205                                         {
1206                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1207                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1208                                         }
1209                                 else
1210                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1211                                 }
1212
1213                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1214                                 {
1215                                 if (algo_strength & SSL_STRONG_MASK)
1216                                         {
1217                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1218                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1219                                         }
1220                                 else
1221                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1222                                 }
1223
1224                         if (ca_list[j]->valid)
1225                                 {
1226                                 /* explicit ciphersuite found; its protocol version
1227                                  * does not become part of the search pattern!*/
1228
1229                                 cipher_id = ca_list[j]->id;
1230                                 }
1231                         else
1232                                 {
1233                                 /* not an explicit ciphersuite; only in this case, the
1234                                  * protocol version is considered part of the search pattern */
1235
1236                                 if (ca_list[j]->algorithm_ssl)
1237                                         {
1238                                         if (alg_ssl)
1239                                                 {
1240                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1241                                                 if (!alg_ssl) { found = 0; break; }
1242                                                 }
1243                                         else
1244                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1245                                         }
1246                                 }
1247
1248                         if (!multi) break;
1249                         }
1250
1251                 /*
1252                  * Ok, we have the rule, now apply it
1253                  */
1254                 if (rule == CIPHER_SPECIAL)
1255                         {       /* special command */
1256                         ok = 0;
1257                         if ((buflen == 8) &&
1258                                 !strncmp(buf, "STRENGTH", 8))
1259                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1260                         else
1261                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1262                                         SSL_R_INVALID_COMMAND);
1263                         if (ok == 0)
1264                                 retval = 0;
1265                         /*
1266                          * We do not support any "multi" options
1267                          * together with "@", so throw away the
1268                          * rest of the command, if any left, until
1269                          * end or ':' is found.
1270                          */
1271                         while ((*l != '\0') && !ITEM_SEP(*l))
1272                                 l++;
1273                         }
1274                 else if (found)
1275                         {
1276                         ssl_cipher_apply_rule(cipher_id,
1277                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1278                                 rule, -1, head_p, tail_p);
1279                         }
1280                 else
1281                         {
1282                         while ((*l != '\0') && !ITEM_SEP(*l))
1283                                 l++;
1284                         }
1285                 if (*l == '\0') break; /* done */
1286                 }
1287
1288         return(retval);
1289         }
1290
1291 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1292                 STACK_OF(SSL_CIPHER) **cipher_list,
1293                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1294                 const char *rule_str)
1295         {
1296         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1297         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1298         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1299         const char *rule_p;
1300         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1301         const SSL_CIPHER **ca_list = NULL;
1302
1303         /*
1304          * Return with error if nothing to do.
1305          */
1306         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1307                 return NULL;
1308
1309         /*
1310          * To reduce the work to do we only want to process the compiled
1311          * in algorithms, so we first get the mask of disabled ciphers.
1312          */
1313         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1314
1315         /*
1316          * Now we have to collect the available ciphers from the compiled
1317          * in ciphers. We cannot get more than the number compiled in, so
1318          * it is used for allocation.
1319          */
1320         num_of_ciphers = ssl_method->num_ciphers();
1321 #ifdef KSSL_DEBUG
1322         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1323 #endif    /* KSSL_DEBUG */
1324         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1325         if (co_list == NULL)
1326                 {
1327                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1328                 return(NULL);   /* Failure */
1329                 }
1330
1331         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1332                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1333                                    co_list, &head, &tail);
1334
1335
1336         /* Now arrange all ciphers by preference: */
1337
1338         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1339         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1340         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1341
1342         /* AES is our preferred symmetric cipher */
1343         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1344
1345         /* Temporarily enable everything else for sorting */
1346         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1347
1348         /* Low priority for MD5 */
1349         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1350
1351         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1352          * (For applications that allow them, they aren't too bad, but we prefer
1353          * authenticated ciphers.) */
1354         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1355
1356         /* Move ciphers without forward secrecy to the end */
1357         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1358         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1359         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1360         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1361         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1362
1363         /* RC4 is sort-of broken -- move the the end */
1364         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1365
1366         /* Now sort by symmetric encryption strength.  The above ordering remains
1367          * in force within each class */
1368         if (!ssl_cipher_strength_sort(&head, &tail))
1369                 {
1370                 OPENSSL_free(co_list);
1371                 return NULL;
1372                 }
1373
1374         /* Now disable everything (maintaining the ordering!) */
1375         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1376
1377
1378         /*
1379          * We also need cipher aliases for selecting based on the rule_str.
1380          * There might be two types of entries in the rule_str: 1) names
1381          * of ciphers themselves 2) aliases for groups of ciphers.
1382          * For 1) we need the available ciphers and for 2) the cipher
1383          * groups of cipher_aliases added together in one list (otherwise
1384          * we would be happy with just the cipher_aliases table).
1385          */
1386         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1387         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1388         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1389         if (ca_list == NULL)
1390                 {
1391                 OPENSSL_free(co_list);
1392                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1393                 return(NULL);   /* Failure */
1394                 }
1395         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1396                                    disabled_mkey, disabled_auth, disabled_enc,
1397                                    disabled_mac, disabled_ssl, head);
1398
1399         /*
1400          * If the rule_string begins with DEFAULT, apply the default rule
1401          * before using the (possibly available) additional rules.
1402          */
1403         ok = 1;
1404         rule_p = rule_str;
1405         if (strncmp(rule_str,"DEFAULT",7) == 0)
1406                 {
1407                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1408                         &head, &tail, ca_list);
1409                 rule_p += 7;
1410                 if (*rule_p == ':')
1411                         rule_p++;
1412                 }
1413
1414         if (ok && (strlen(rule_p) > 0))
1415                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1416
1417         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1418
1419         if (!ok)
1420                 {       /* Rule processing failure */
1421                 OPENSSL_free(co_list);
1422                 return(NULL);
1423                 }
1424
1425         /*
1426          * Allocate new "cipherstack" for the result, return with error
1427          * if we cannot get one.
1428          */
1429         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1430                 {
1431                 OPENSSL_free(co_list);
1432                 return(NULL);
1433                 }
1434
1435         /*
1436          * The cipher selection for the list is done. The ciphers are added
1437          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1438          */
1439         for (curr = head; curr != NULL; curr = curr->next)
1440                 {
1441                 if (curr->active)
1442                         {
1443                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1444 #ifdef CIPHER_DEBUG
1445                         printf("<%s>\n",curr->cipher->name);
1446 #endif
1447                         }
1448                 }
1449         OPENSSL_free(co_list);  /* Not needed any longer */
1450
1451         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1452         if (tmp_cipher_list == NULL)
1453                 {
1454                 sk_SSL_CIPHER_free(cipherstack);
1455                 return NULL;
1456                 }
1457         if (*cipher_list != NULL)
1458                 sk_SSL_CIPHER_free(*cipher_list);
1459         *cipher_list = cipherstack;
1460         if (*cipher_list_by_id != NULL)
1461                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1462         *cipher_list_by_id = tmp_cipher_list;
1463         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1464
1465         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1466         return(cipherstack);
1467         }
1468
1469 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1470         {
1471         int is_export,pkl,kl;
1472         const char *ver,*exp_str;
1473         const char *kx,*au,*enc,*mac;
1474         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1475 #ifdef KSSL_DEBUG
1476         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1477 #else
1478         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1479 #endif /* KSSL_DEBUG */
1480
1481         alg_mkey = cipher->algorithm_mkey;
1482         alg_auth = cipher->algorithm_auth;
1483         alg_enc = cipher->algorithm_enc;
1484         alg_mac = cipher->algorithm_mac;
1485         alg_ssl = cipher->algorithm_ssl;
1486
1487         alg2=cipher->algorithm2;
1488
1489         is_export=SSL_C_IS_EXPORT(cipher);
1490         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1491         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1492         exp_str=is_export?" export":"";
1493
1494         if (alg_ssl & SSL_SSLV2)
1495                 ver="SSLv2";
1496         else if (alg_ssl & SSL_SSLV3)
1497                 ver="SSLv3";
1498         else
1499                 ver="unknown";
1500
1501         switch (alg_mkey)
1502                 {
1503         case SSL_kRSA:
1504                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1505                 break;
1506         case SSL_kDHr:
1507                 kx="DH/RSA";
1508                 break;
1509         case SSL_kDHd:
1510                 kx="DH/DSS";
1511                 break;
1512         case SSL_kKRB5:
1513                 kx="KRB5";
1514                 break;
1515         case SSL_kEDH:
1516                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1517                 break;
1518         case SSL_kECDHr:
1519                 kx="ECDH/RSA";
1520                 break;
1521         case SSL_kECDHe:
1522                 kx="ECDH/ECDSA";
1523                 break;
1524         case SSL_kEECDH:
1525                 kx="ECDH";
1526                 break;
1527         case SSL_kPSK:
1528                 kx="PSK";
1529                 break;
1530         case SSL_kSRP:
1531                 kx="SRP";
1532                 break;
1533         default:
1534                 kx="unknown";
1535                 }
1536
1537         switch (alg_auth)
1538                 {
1539         case SSL_aRSA:
1540                 au="RSA";
1541                 break;
1542         case SSL_aDSS:
1543                 au="DSS";
1544                 break;
1545         case SSL_aDH:
1546                 au="DH";
1547                 break;
1548         case SSL_aKRB5:
1549                 au="KRB5";
1550                 break;
1551         case SSL_aECDH:
1552                 au="ECDH";
1553                 break;
1554         case SSL_aNULL:
1555                 au="None";
1556                 break;
1557         case SSL_aECDSA:
1558                 au="ECDSA";
1559                 break;
1560         case SSL_aPSK:
1561                 au="PSK";
1562                 break;
1563         default:
1564                 au="unknown";
1565                 break;
1566                 }
1567
1568         switch (alg_enc)
1569                 {
1570         case SSL_DES:
1571                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1572                 break;
1573         case SSL_3DES:
1574                 enc="3DES(168)";
1575                 break;
1576         case SSL_RC4:
1577                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1578                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1579                 break;
1580         case SSL_RC2:
1581                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1582                 break;
1583         case SSL_IDEA:
1584                 enc="IDEA(128)";
1585                 break;
1586         case SSL_eNULL:
1587                 enc="None";
1588                 break;
1589         case SSL_AES128:
1590                 enc="AES(128)";
1591                 break;
1592         case SSL_AES256:
1593                 enc="AES(256)";
1594                 break;
1595         case SSL_CAMELLIA128:
1596                 enc="Camellia(128)";
1597                 break;
1598         case SSL_CAMELLIA256:
1599                 enc="Camellia(256)";
1600                 break;
1601         case SSL_SEED:
1602                 enc="SEED(128)";
1603                 break;
1604         default:
1605                 enc="unknown";
1606                 break;
1607                 }
1608
1609         switch (alg_mac)
1610                 {
1611         case SSL_MD5:
1612                 mac="MD5";
1613                 break;
1614         case SSL_SHA1:
1615                 mac="SHA1";
1616                 break;
1617         case SSL_SHA256:
1618                 mac="SHA256";
1619                 break;
1620         default:
1621                 mac="unknown";
1622                 break;
1623                 }
1624
1625         if (buf == NULL)
1626                 {
1627                 len=128;
1628                 buf=OPENSSL_malloc(len);
1629                 if (buf == NULL) return("OPENSSL_malloc Error");
1630                 }
1631         else if (len < 128)
1632                 return("Buffer too small");
1633
1634 #ifdef KSSL_DEBUG
1635         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1636 #else
1637         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1638 #endif /* KSSL_DEBUG */
1639         return(buf);
1640         }
1641
1642 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1643         {
1644         int i;
1645
1646         if (c == NULL) return("(NONE)");
1647         i=(int)(c->id>>24L);
1648         if (i == 3)
1649                 return("TLSv1/SSLv3");
1650         else if (i == 2)
1651                 return("SSLv2");
1652         else
1653                 return("unknown");
1654         }
1655
1656 /* return the actual cipher being used */
1657 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1658         {
1659         if (c != NULL)
1660                 return(c->name);
1661         return("(NONE)");
1662         }
1663
1664 /* number of bits for symmetric cipher */
1665 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1666         {
1667         int ret=0;
1668
1669         if (c != NULL)
1670                 {
1671                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1672                 ret = c->strength_bits;
1673                 }
1674         return(ret);
1675         }
1676
1677 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1678         {
1679         return c->id;
1680         }
1681
1682 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1683         {
1684         SSL_COMP *ctmp;
1685         int i,nn;
1686
1687         if ((n == 0) || (sk == NULL)) return(NULL);
1688         nn=sk_SSL_COMP_num(sk);
1689         for (i=0; i<nn; i++)
1690                 {
1691                 ctmp=sk_SSL_COMP_value(sk,i);
1692                 if (ctmp->id == n)
1693                         return(ctmp);
1694                 }
1695         return(NULL);
1696         }
1697
1698 #ifdef OPENSSL_NO_COMP
1699 void *SSL_COMP_get_compression_methods(void)
1700         {
1701         return NULL;
1702         }
1703 int SSL_COMP_add_compression_method(int id, void *cm)
1704         {
1705         return 1;
1706         }
1707
1708 const char *SSL_COMP_get_name(const void *comp)
1709         {
1710         return NULL;
1711         }
1712 #else
1713 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1714         {
1715         load_builtin_compressions();
1716         return(ssl_comp_methods);
1717         }
1718
1719 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1720         {
1721         SSL_COMP *comp;
1722
1723         if (cm == NULL || cm->type == NID_undef)
1724                 return 1;
1725
1726         /* According to draft-ietf-tls-compression-04.txt, the
1727            compression number ranges should be the following:
1728
1729            0 to 63:    methods defined by the IETF
1730            64 to 192:  external party methods assigned by IANA
1731            193 to 255: reserved for private use */
1732         if (id < 193 || id > 255)
1733                 {
1734                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1735                 return 0;
1736                 }
1737
1738         MemCheck_off();
1739         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1740         comp->id=id;
1741         comp->method=cm;
1742         load_builtin_compressions();
1743         if (ssl_comp_methods
1744                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1745                 {
1746                 OPENSSL_free(comp);
1747                 MemCheck_on();
1748                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1749                 return(1);
1750                 }
1751         else if ((ssl_comp_methods == NULL)
1752                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1753                 {
1754                 OPENSSL_free(comp);
1755                 MemCheck_on();
1756                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1757                 return(1);
1758                 }
1759         else
1760                 {
1761                 MemCheck_on();
1762                 return(0);
1763                 }
1764         }
1765
1766 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1767         {
1768         if (comp)
1769                 return comp->name;
1770         return NULL;
1771         }
1772
1773 #endif