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) &&
 587             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
 588             (!mac_pkey_type||*mac_pkey_type != NID_undef))
 589                 {
 590                 const EVP_CIPHER *evp;
 591
 592                 if      (s->ssl_version >= TLS1_VERSION &&
 593                          c->algorithm_enc == SSL_RC4 &&
 594                          c->algorithm_mac == SSL_MD5 &&
 595                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
 596                         *enc = evp, *md = NULL;
 597                 else if (s->ssl_version >= TLS1_VERSION &&
 598                          c->algorithm_enc == SSL_AES128 &&
 599                          c->algorithm_mac == SSL_SHA1 &&
 600                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
 601                         *enc = evp, *md = NULL;
 602                 else if (s->ssl_version >= TLS1_VERSION &&
 603                          c->algorithm_enc == SSL_AES256 &&
 604                          c->algorithm_mac == SSL_SHA1 &&
 605                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
 606                         *enc = evp, *md = NULL;
 607                 return(1);
 608                 }
 609         else
 610                 return(0);
 611         }
 612
 613 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 614 {
 615         if (idx <0||idx>=SSL_MD_NUM_IDX)
 616                 {
 617                 return 0;
 618                 }
 619         *mask = ssl_handshake_digest_flag[idx];
 620         if (*mask)
 621                 *md = ssl_digest_methods[idx];
 622         else
 623                 *md = NULL;
 624         return 1;
 625 }
 626
 627 #define ITEM_SEP(a) \
 628         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 629
 630 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 631              CIPHER_ORDER **tail)
 632         {
 633         if (curr == *tail) return;
 634         if (curr == *head)
 635                 *head=curr->next;
 636         if (curr->prev != NULL)
 637                 curr->prev->next=curr->next;
 638         if (curr->next != NULL)
 639                 curr->next->prev=curr->prev;
 640         (*tail)->next=curr;
 641         curr->prev= *tail;
 642         curr->next=NULL;
 643         *tail=curr;
 644         }
 645
 646 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 647              CIPHER_ORDER **tail)
 648         {
 649         if (curr == *head) return;
 650         if (curr == *tail)
 651                 *tail=curr->prev;
 652         if (curr->next != NULL)
 653                 curr->next->prev=curr->prev;
 654         if (curr->prev != NULL)
 655                 curr->prev->next=curr->next;
 656         (*head)->prev=curr;
 657         curr->next= *head;
 658         curr->prev=NULL;
 659         *head=curr;
 660         }
 661
 662 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 663         {
 664         *mkey = 0;
 665         *auth = 0;
 666         *enc = 0;
 667         *mac = 0;
 668         *ssl = 0;
 669
 670 #ifdef OPENSSL_NO_RSA
 671         *mkey |= SSL_kRSA;
 672         *auth |= SSL_aRSA;
 673 #endif
 674 #ifdef OPENSSL_NO_DSA
 675         *auth |= SSL_aDSS;
 676 #endif
 677         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 678         *auth |= SSL_aDH;
 679 #ifdef OPENSSL_NO_DH
 680         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 681         *auth |= SSL_aDH;
 682 #endif
 683 #ifdef OPENSSL_NO_KRB5
 684         *mkey |= SSL_kKRB5;
 685         *auth |= SSL_aKRB5;
 686 #endif
 687 #ifdef OPENSSL_NO_ECDSA
 688         *auth |= SSL_aECDSA;
 689 #endif
 690 #ifdef OPENSSL_NO_ECDH
 691         *mkey |= SSL_kECDHe|SSL_kECDHr;
 692         *auth |= SSL_aECDH;
 693 #endif
 694 #ifdef OPENSSL_NO_PSK
 695         *mkey |= SSL_kPSK;
 696         *auth |= SSL_aPSK;
 697 #endif
 698 #ifdef OPENSSL_NO_SRP
 699         *mkey |= SSL_kSRP;
 700 #endif
 701         /* Check for presence of GOST 34.10 algorithms, and if they
 702          * do not present, disable  appropriate auth and key exchange */
 703         if (!get_optional_pkey_id("gost94")) {
 704                 *auth |= SSL_aGOST94;
 705         }
 706         if (!get_optional_pkey_id("gost2001")) {
 707                 *auth |= SSL_aGOST01;
 708         }
 709         /* Disable GOST key exchange if no GOST signature algs are available * */
 710         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 711                 *mkey |= SSL_kGOST;
 712         }
 713 #ifdef SSL_FORBID_ENULL
 714         *enc |= SSL_eNULL;
 715 #endif
 716
 717
 718
 719         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 720         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 721         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 722         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 723         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 724         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 725         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 726         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 727         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 728         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 729         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 730
 731         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 732         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 733         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
 734         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 735         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 736
 737         }
 738
 739 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 740                 int num_of_ciphers,
 741                 unsigned long disabled_mkey, unsigned long disabled_auth,
 742                 unsigned long disabled_enc, unsigned long disabled_mac,
 743                 unsigned long disabled_ssl,
 744                 CIPHER_ORDER *co_list,
 745                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 746         {
 747         int i, co_list_num;
 748         const SSL_CIPHER *c;
 749
 750         /*
 751          * We have num_of_ciphers descriptions compiled in, depending on the
 752          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 753          * These will later be sorted in a linked list with at most num
 754          * entries.
 755          */
 756
 757         /* Get the initial list of ciphers */
 758         co_list_num = 0;        /* actual count of ciphers */
 759         for (i = 0; i < num_of_ciphers; i++)
 760                 {
 761                 c = ssl_method->get_cipher(i);
 762                 /* drop those that use any of that is not available */
 763                 if ((c != NULL) && c->valid &&
 764 #ifdef OPENSSL_FIPS
 765                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
 766 #endif
 767                     !(c->algorithm_mkey & disabled_mkey) &&
 768                     !(c->algorithm_auth & disabled_auth) &&
 769                     !(c->algorithm_enc & disabled_enc) &&
 770                     !(c->algorithm_mac & disabled_mac) &&
 771                     !(c->algorithm_ssl & disabled_ssl))
 772                         {
 773                         co_list[co_list_num].cipher = c;
 774                         co_list[co_list_num].next = NULL;
 775                         co_list[co_list_num].prev = NULL;
 776                         co_list[co_list_num].active = 0;
 777                         co_list_num++;
 778 #ifdef KSSL_DEBUG
 779                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 780 #endif  /* KSSL_DEBUG */
 781                         /*
 782                         if (!sk_push(ca_list,(char *)c)) goto err;
 783                         */
 784                         }
 785                 }
 786
 787         /*
 788          * Prepare linked list from list entries
 789          */
 790         if (co_list_num > 0)
 791                 {
 792                 co_list[0].prev = NULL;
 793
 794                 if (co_list_num > 1)
 795                         {
 796                         co_list[0].next = &co_list[1];
 797
 798                         for (i = 1; i < co_list_num - 1; i++)
 799                                 {
 800                                 co_list[i].prev = &co_list[i - 1];
 801                                 co_list[i].next = &co_list[i + 1];
 802                                 }
 803
 804                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 805                         }
 806
 807                 co_list[co_list_num - 1].next = NULL;
 808
 809                 *head_p = &co_list[0];
 810                 *tail_p = &co_list[co_list_num - 1];
 811                 }
 812         }
 813
 814 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
 815                         int num_of_group_aliases,
 816                         unsigned long disabled_mkey, unsigned long disabled_auth,
 817                         unsigned long disabled_enc, unsigned long disabled_mac,
 818                         unsigned long disabled_ssl,
 819                         CIPHER_ORDER *head)
 820         {
 821         CIPHER_ORDER *ciph_curr;
 822         const SSL_CIPHER **ca_curr;
 823         int i;
 824         unsigned long mask_mkey = ~disabled_mkey;
 825         unsigned long mask_auth = ~disabled_auth;
 826         unsigned long mask_enc = ~disabled_enc;
 827         unsigned long mask_mac = ~disabled_mac;
 828         unsigned long mask_ssl = ~disabled_ssl;
 829
 830         /*
 831          * First, add the real ciphers as already collected
 832          */
 833         ciph_curr = head;
 834         ca_curr = ca_list;
 835         while (ciph_curr != NULL)
 836                 {
 837                 *ca_curr = ciph_curr->cipher;
 838                 ca_curr++;
 839                 ciph_curr = ciph_curr->next;
 840                 }
 841
 842         /*
 843          * Now we add the available ones from the cipher_aliases[] table.
 844          * They represent either one or more algorithms, some of which
 845          * in any affected category must be supported (set in enabled_mask),
 846          * or represent a cipher strength value (will be added in any case because algorithms=0).
 847          */
 848         for (i = 0; i < num_of_group_aliases; i++)
 849                 {
 850                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 851                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 852                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 853                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 854                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 855
 856                 if (algorithm_mkey)
 857                         if ((algorithm_mkey & mask_mkey) == 0)
 858                                 continue;
 859
 860                 if (algorithm_auth)
 861                         if ((algorithm_auth & mask_auth) == 0)
 862                                 continue;
 863
 864                 if (algorithm_enc)
 865                         if ((algorithm_enc & mask_enc) == 0)
 866                                 continue;
 867
 868                 if (algorithm_mac)
 869                         if ((algorithm_mac & mask_mac) == 0)
 870                                 continue;
 871
 872                 if (algorithm_ssl)
 873                         if ((algorithm_ssl & mask_ssl) == 0)
 874                                 continue;
 875
 876                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 877                 ca_curr++;
 878                 }
 879
 880         *ca_curr = NULL;        /* end of list */
 881         }
 882
 883 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 884                 unsigned long alg_mkey, unsigned long alg_auth,
 885                 unsigned long alg_enc, unsigned long alg_mac,
 886                 unsigned long alg_ssl,
 887                 unsigned long algo_strength,
 888                 int rule, int strength_bits,
 889                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 890         {
 891         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 892         const SSL_CIPHER *cp;
 893         int reverse = 0;
 894
 895 #ifdef CIPHER_DEBUG
 896         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 897                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 898 #endif
 899
 900         if (rule == CIPHER_DEL)
 901                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 902
 903         head = *head_p;
 904         tail = *tail_p;
 905
 906         if (reverse)
 907                 {
 908                 curr = tail;
 909                 last = head;
 910                 }
 911         else
 912                 {
 913                 curr = head;
 914                 last = tail;
 915                 }
 916
 917         curr2 = curr;
 918         for (;;)
 919                 {
 920                 if ((curr == NULL) || (curr == last)) break;
 921                 curr = curr2;
 922                 curr2 = reverse ? curr->prev : curr->next;
 923
 924                 cp = curr->cipher;
 925
 926                 /*
 927                  * Selection criteria is either the value of strength_bits
 928                  * or the algorithms used.
 929                  */
 930                 if (strength_bits >= 0)
 931                         {
 932                         if (strength_bits != cp->strength_bits)
 933                                 continue;
 934                         }
 935                 else
 936                         {
 937 #ifdef CIPHER_DEBUG
 938                         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);
 939 #endif
 940
 941                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 942                                 continue;
 943                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 944                                 continue;
 945                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 946                                 continue;
 947                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 948                                 continue;
 949                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 950                                 continue;
 951                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 952                                 continue;
 953                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 954                                 continue;
 955                         }
 956
 957 #ifdef CIPHER_DEBUG
 958                 printf("Action = %d\n", rule);
 959 #endif
 960
 961                 /* add the cipher if it has not been added yet. */
 962                 if (rule == CIPHER_ADD)
 963                         {
 964                         /* reverse == 0 */
 965                         if (!curr->active)
 966                                 {
 967                                 ll_append_tail(&head, curr, &tail);
 968                                 curr->active = 1;
 969                                 }
 970                         }
 971                 /* Move the added cipher to this location */
 972                 else if (rule == CIPHER_ORD)
 973                         {
 974                         /* reverse == 0 */
 975                         if (curr->active)
 976                                 {
 977                                 ll_append_tail(&head, curr, &tail);
 978                                 }
 979                         }
 980                 else if (rule == CIPHER_DEL)
 981                         {
 982                         /* reverse == 1 */
 983                         if (curr->active)
 984                                 {
 985                                 /* most recently deleted ciphersuites get best positions
 986                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
 987                                  * works in reverse to maintain the order) */
 988                                 ll_append_head(&head, curr, &tail);
 989                                 curr->active = 0;
 990                                 }
 991                         }
 992                 else if (rule == CIPHER_KILL)
 993                         {
 994                         /* reverse == 0 */
 995                         if (head == curr)
 996                                 head = curr->next;
 997                         else
 998                                 curr->prev->next = curr->next;
 999                         if (tail == curr)
1000                                 tail = curr->prev;
1001                         curr->active = 0;
1002                         if (curr->next != NULL)
1003                                 curr->next->prev = curr->prev;
1004                         if (curr->prev != NULL)
1005                                 curr->prev->next = curr->next;
1006                         curr->next = NULL;
1007                         curr->prev = NULL;
1008                         }
1009                 }
1010
1011         *head_p = head;
1012         *tail_p = tail;
1013         }
1014
1015 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1016                                     CIPHER_ORDER **tail_p)
1017         {
1018         int max_strength_bits, i, *number_uses;
1019         CIPHER_ORDER *curr;
1020
1021         /*
1022          * This routine sorts the ciphers with descending strength. The sorting
1023          * must keep the pre-sorted sequence, so we apply the normal sorting
1024          * routine as '+' movement to the end of the list.
1025          */
1026         max_strength_bits = 0;
1027         curr = *head_p;
1028         while (curr != NULL)
1029                 {
1030                 if (curr->active &&
1031                     (curr->cipher->strength_bits > max_strength_bits))
1032                     max_strength_bits = curr->cipher->strength_bits;
1033                 curr = curr->next;
1034                 }
1035
1036         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1037         if (!number_uses)
1038                 {
1039                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1040                 return(0);
1041                 }
1042         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1043
1044         /*
1045          * Now find the strength_bits values actually used
1046          */
1047         curr = *head_p;
1048         while (curr != NULL)
1049                 {
1050                 if (curr->active)
1051                         number_uses[curr->cipher->strength_bits]++;
1052                 curr = curr->next;
1053                 }
1054         /*
1055          * Go through the list of used strength_bits values in descending
1056          * order.
1057          */
1058         for (i = max_strength_bits; i >= 0; i--)
1059                 if (number_uses[i] > 0)
1060                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1061
1062         OPENSSL_free(number_uses);
1063         return(1);
1064         }
1065
1066 static int ssl_cipher_process_rulestr(const char *rule_str,
1067                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1068                 const SSL_CIPHER **ca_list)
1069         {
1070         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1071         const char *l, *buf;
1072         int j, multi, found, rule, retval, ok, buflen;
1073         unsigned long cipher_id = 0;
1074         char ch;
1075
1076         retval = 1;
1077         l = rule_str;
1078         for (;;)
1079                 {
1080                 ch = *l;
1081
1082                 if (ch == '\0')
1083                         break;          /* done */
1084                 if (ch == '-')
1085                         { rule = CIPHER_DEL; l++; }
1086                 else if (ch == '+')
1087                         { rule = CIPHER_ORD; l++; }
1088                 else if (ch == '!')
1089                         { rule = CIPHER_KILL; l++; }
1090                 else if (ch == '@')
1091                         { rule = CIPHER_SPECIAL; l++; }
1092                 else
1093                         { rule = CIPHER_ADD; }
1094
1095                 if (ITEM_SEP(ch))
1096                         {
1097                         l++;
1098                         continue;
1099                         }
1100
1101                 alg_mkey = 0;
1102                 alg_auth = 0;
1103                 alg_enc = 0;
1104                 alg_mac = 0;
1105                 alg_ssl = 0;
1106                 algo_strength = 0;
1107
1108                 for (;;)
1109                         {
1110                         ch = *l;
1111                         buf = l;
1112                         buflen = 0;
1113 #ifndef CHARSET_EBCDIC
1114                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1115                                 ((ch >= '0') && (ch <= '9')) ||
1116                                 ((ch >= 'a') && (ch <= 'z')) ||
1117                                  (ch == '-'))
1118 #else
1119                         while ( isalnum(ch) || (ch == '-'))
1120 #endif
1121                                  {
1122                                  ch = *(++l);
1123                                  buflen++;
1124                                  }
1125
1126                         if (buflen == 0)
1127                                 {
1128                                 /*
1129                                  * We hit something we cannot deal with,
1130                                  * it is no command or separator nor
1131                                  * alphanumeric, so we call this an error.
1132                                  */
1133                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1134                                        SSL_R_INVALID_COMMAND);
1135                                 retval = found = 0;
1136                                 l++;
1137                                 break;
1138                                 }
1139
1140                         if (rule == CIPHER_SPECIAL)
1141                                 {
1142                                 found = 0; /* unused -- avoid compiler warning */
1143                                 break;  /* special treatment */
1144                                 }
1145
1146                         /* check for multi-part specification */
1147                         if (ch == '+')
1148                                 {
1149                                 multi=1;
1150                                 l++;
1151                                 }
1152                         else
1153                                 multi=0;
1154
1155                         /*
1156                          * Now search for the cipher alias in the ca_list. Be careful
1157                          * with the strncmp, because the "buflen" limitation
1158                          * will make the rule "ADH:SOME" and the cipher
1159                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1160                          * So additionally check whether the cipher name found
1161                          * has the correct length. We can save a strlen() call:
1162                          * just checking for the '\0' at the right place is
1163                          * sufficient, we have to strncmp() anyway. (We cannot
1164                          * use strcmp(), because buf is not '\0' terminated.)
1165                          */
1166                         j = found = 0;
1167                         cipher_id = 0;
1168                         while (ca_list[j])
1169                                 {
1170                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1171                                     (ca_list[j]->name[buflen] == '\0'))
1172                                         {
1173                                         found = 1;
1174                                         break;
1175                                         }
1176                                 else
1177                                         j++;
1178                                 }
1179
1180                         if (!found)
1181                                 break;  /* ignore this entry */
1182
1183                         if (ca_list[j]->algorithm_mkey)
1184                                 {
1185                                 if (alg_mkey)
1186                                         {
1187                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1188                                         if (!alg_mkey) { found = 0; break; }
1189                                         }
1190                                 else
1191                                         alg_mkey = ca_list[j]->algorithm_mkey;
1192                                 }
1193
1194                         if (ca_list[j]->algorithm_auth)
1195                                 {
1196                                 if (alg_auth)
1197                                         {
1198                                         alg_auth &= ca_list[j]->algorithm_auth;
1199                                         if (!alg_auth) { found = 0; break; }
1200                                         }
1201                                 else
1202                                         alg_auth = ca_list[j]->algorithm_auth;
1203                                 }
1204
1205                         if (ca_list[j]->algorithm_enc)
1206                                 {
1207                                 if (alg_enc)
1208                                         {
1209                                         alg_enc &= ca_list[j]->algorithm_enc;
1210                                         if (!alg_enc) { found = 0; break; }
1211                                         }
1212                                 else
1213                                         alg_enc = ca_list[j]->algorithm_enc;
1214                                 }
1215
1216                         if (ca_list[j]->algorithm_mac)
1217                                 {
1218                                 if (alg_mac)
1219                                         {
1220                                         alg_mac &= ca_list[j]->algorithm_mac;
1221                                         if (!alg_mac) { found = 0; break; }
1222                                         }
1223                                 else
1224                                         alg_mac = ca_list[j]->algorithm_mac;
1225                                 }
1226
1227                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1228                                 {
1229                                 if (algo_strength & SSL_EXP_MASK)
1230                                         {
1231                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1232                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1233                                         }
1234                                 else
1235                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1236                                 }
1237
1238                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1239                                 {
1240                                 if (algo_strength & SSL_STRONG_MASK)
1241                                         {
1242                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1243                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1244                                         }
1245                                 else
1246                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1247                                 }
1248
1249                         if (ca_list[j]->valid)
1250                                 {
1251                                 /* explicit ciphersuite found; its protocol version
1252                                  * does not become part of the search pattern!*/
1253
1254                                 cipher_id = ca_list[j]->id;
1255                                 }
1256                         else
1257                                 {
1258                                 /* not an explicit ciphersuite; only in this case, the
1259                                  * protocol version is considered part of the search pattern */
1260
1261                                 if (ca_list[j]->algorithm_ssl)
1262                                         {
1263                                         if (alg_ssl)
1264                                                 {
1265                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1266                                                 if (!alg_ssl) { found = 0; break; }
1267                                                 }
1268                                         else
1269                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1270                                         }
1271                                 }
1272
1273                         if (!multi) break;
1274                         }
1275
1276                 /*
1277                  * Ok, we have the rule, now apply it
1278                  */
1279                 if (rule == CIPHER_SPECIAL)
1280                         {       /* special command */
1281                         ok = 0;
1282                         if ((buflen == 8) &&
1283                                 !strncmp(buf, "STRENGTH", 8))
1284                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1285                         else
1286                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1287                                         SSL_R_INVALID_COMMAND);
1288                         if (ok == 0)
1289                                 retval = 0;
1290                         /*
1291                          * We do not support any "multi" options
1292                          * together with "@", so throw away the
1293                          * rest of the command, if any left, until
1294                          * end or ':' is found.
1295                          */
1296                         while ((*l != '\0') && !ITEM_SEP(*l))
1297                                 l++;
1298                         }
1299                 else if (found)
1300                         {
1301                         ssl_cipher_apply_rule(cipher_id,
1302                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1303                                 rule, -1, head_p, tail_p);
1304                         }
1305                 else
1306                         {
1307                         while ((*l != '\0') && !ITEM_SEP(*l))
1308                                 l++;
1309                         }
1310                 if (*l == '\0') break; /* done */
1311                 }
1312
1313         return(retval);
1314         }
1315
1316 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1317                 STACK_OF(SSL_CIPHER) **cipher_list,
1318                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1319                 const char *rule_str)
1320         {
1321         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1322         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1323         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1324         const char *rule_p;
1325         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1326         const SSL_CIPHER **ca_list = NULL;
1327
1328         /*
1329          * Return with error if nothing to do.
1330          */
1331         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1332                 return NULL;
1333
1334         /*
1335          * To reduce the work to do we only want to process the compiled
1336          * in algorithms, so we first get the mask of disabled ciphers.
1337          */
1338         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1339
1340         /*
1341          * Now we have to collect the available ciphers from the compiled
1342          * in ciphers. We cannot get more than the number compiled in, so
1343          * it is used for allocation.
1344          */
1345         num_of_ciphers = ssl_method->num_ciphers();
1346 #ifdef KSSL_DEBUG
1347         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1348 #endif    /* KSSL_DEBUG */
1349         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1350         if (co_list == NULL)
1351                 {
1352                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1353                 return(NULL);   /* Failure */
1354                 }
1355
1356         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1357                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1358                                    co_list, &head, &tail);
1359
1360
1361         /* Now arrange all ciphers by preference: */
1362
1363         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1364         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1365         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1366
1367         /* AES is our preferred symmetric cipher */
1368         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1369
1370         /* Temporarily enable everything else for sorting */
1371         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1372
1373         /* Low priority for MD5 */
1374         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1375
1376         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1377          * (For applications that allow them, they aren't too bad, but we prefer
1378          * authenticated ciphers.) */
1379         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1380
1381         /* Move ciphers without forward secrecy to the end */
1382         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1383         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1384         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1385         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1386         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1387
1388         /* RC4 is sort-of broken -- move the the end */
1389         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1390
1391         /* Now sort by symmetric encryption strength.  The above ordering remains
1392          * in force within each class */
1393         if (!ssl_cipher_strength_sort(&head, &tail))
1394                 {
1395                 OPENSSL_free(co_list);
1396                 return NULL;
1397                 }
1398
1399         /* Now disable everything (maintaining the ordering!) */
1400         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1401
1402
1403         /*
1404          * We also need cipher aliases for selecting based on the rule_str.
1405          * There might be two types of entries in the rule_str: 1) names
1406          * of ciphers themselves 2) aliases for groups of ciphers.
1407          * For 1) we need the available ciphers and for 2) the cipher
1408          * groups of cipher_aliases added together in one list (otherwise
1409          * we would be happy with just the cipher_aliases table).
1410          */
1411         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1412         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1413         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1414         if (ca_list == NULL)
1415                 {
1416                 OPENSSL_free(co_list);
1417                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1418                 return(NULL);   /* Failure */
1419                 }
1420         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1421                                    disabled_mkey, disabled_auth, disabled_enc,
1422                                    disabled_mac, disabled_ssl, head);
1423
1424         /*
1425          * If the rule_string begins with DEFAULT, apply the default rule
1426          * before using the (possibly available) additional rules.
1427          */
1428         ok = 1;
1429         rule_p = rule_str;
1430         if (strncmp(rule_str,"DEFAULT",7) == 0)
1431                 {
1432                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1433                         &head, &tail, ca_list);
1434                 rule_p += 7;
1435                 if (*rule_p == ':')
1436                         rule_p++;
1437                 }
1438
1439         if (ok && (strlen(rule_p) > 0))
1440                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1441
1442         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1443
1444         if (!ok)
1445                 {       /* Rule processing failure */
1446                 OPENSSL_free(co_list);
1447                 return(NULL);
1448                 }
1449
1450         /*
1451          * Allocate new "cipherstack" for the result, return with error
1452          * if we cannot get one.
1453          */
1454         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1455                 {
1456                 OPENSSL_free(co_list);
1457                 return(NULL);
1458                 }
1459
1460         /*
1461          * The cipher selection for the list is done. The ciphers are added
1462          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1463          */
1464         for (curr = head; curr != NULL; curr = curr->next)
1465                 {
1466 #ifdef OPENSSL_FIPS
1467                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1468 #else
1469                 if (curr->active)
1470 #endif
1471                         {
1472                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1473 #ifdef CIPHER_DEBUG
1474                         printf("<%s>\n",curr->cipher->name);
1475 #endif
1476                         }
1477                 }
1478         OPENSSL_free(co_list);  /* Not needed any longer */
1479
1480         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1481         if (tmp_cipher_list == NULL)
1482                 {
1483                 sk_SSL_CIPHER_free(cipherstack);
1484                 return NULL;
1485                 }
1486         if (*cipher_list != NULL)
1487                 sk_SSL_CIPHER_free(*cipher_list);
1488         *cipher_list = cipherstack;
1489         if (*cipher_list_by_id != NULL)
1490                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1491         *cipher_list_by_id = tmp_cipher_list;
1492         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1493
1494         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1495         return(cipherstack);
1496         }
1497
1498 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1499         {
1500         int is_export,pkl,kl;
1501         const char *ver,*exp_str;
1502         const char *kx,*au,*enc,*mac;
1503         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1504 #ifdef KSSL_DEBUG
1505         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1506 #else
1507         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1508 #endif /* KSSL_DEBUG */
1509
1510         alg_mkey = cipher->algorithm_mkey;
1511         alg_auth = cipher->algorithm_auth;
1512         alg_enc = cipher->algorithm_enc;
1513         alg_mac = cipher->algorithm_mac;
1514         alg_ssl = cipher->algorithm_ssl;
1515
1516         alg2=cipher->algorithm2;
1517
1518         is_export=SSL_C_IS_EXPORT(cipher);
1519         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1520         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1521         exp_str=is_export?" export":"";
1522
1523         if (alg_ssl & SSL_SSLV2)
1524                 ver="SSLv2";
1525         else if (alg_ssl & SSL_SSLV3)
1526                 ver="SSLv3";
1527         else
1528                 ver="unknown";
1529
1530         switch (alg_mkey)
1531                 {
1532         case SSL_kRSA:
1533                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1534                 break;
1535         case SSL_kDHr:
1536                 kx="DH/RSA";
1537                 break;
1538         case SSL_kDHd:
1539                 kx="DH/DSS";
1540                 break;
1541         case SSL_kKRB5:
1542                 kx="KRB5";
1543                 break;
1544         case SSL_kEDH:
1545                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1546                 break;
1547         case SSL_kECDHr:
1548                 kx="ECDH/RSA";
1549                 break;
1550         case SSL_kECDHe:
1551                 kx="ECDH/ECDSA";
1552                 break;
1553         case SSL_kEECDH:
1554                 kx="ECDH";
1555                 break;
1556         case SSL_kPSK:
1557                 kx="PSK";
1558                 break;
1559         case SSL_kSRP:
1560                 kx="SRP";
1561                 break;
1562         default:
1563                 kx="unknown";
1564                 }
1565
1566         switch (alg_auth)
1567                 {
1568         case SSL_aRSA:
1569                 au="RSA";
1570                 break;
1571         case SSL_aDSS:
1572                 au="DSS";
1573                 break;
1574         case SSL_aDH:
1575                 au="DH";
1576                 break;
1577         case SSL_aKRB5:
1578                 au="KRB5";
1579                 break;
1580         case SSL_aECDH:
1581                 au="ECDH";
1582                 break;
1583         case SSL_aNULL:
1584                 au="None";
1585                 break;
1586         case SSL_aECDSA:
1587                 au="ECDSA";
1588                 break;
1589         case SSL_aPSK:
1590                 au="PSK";
1591                 break;
1592         default:
1593                 au="unknown";
1594                 break;
1595                 }
1596
1597         switch (alg_enc)
1598                 {
1599         case SSL_DES:
1600                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1601                 break;
1602         case SSL_3DES:
1603                 enc="3DES(168)";
1604                 break;
1605         case SSL_RC4:
1606                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1607                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1608                 break;
1609         case SSL_RC2:
1610                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1611                 break;
1612         case SSL_IDEA:
1613                 enc="IDEA(128)";
1614                 break;
1615         case SSL_eNULL:
1616                 enc="None";
1617                 break;
1618         case SSL_AES128:
1619                 enc="AES(128)";
1620                 break;
1621         case SSL_AES256:
1622                 enc="AES(256)";
1623                 break;
1624         case SSL_CAMELLIA128:
1625                 enc="Camellia(128)";
1626                 break;
1627         case SSL_CAMELLIA256:
1628                 enc="Camellia(256)";
1629                 break;
1630         case SSL_SEED:
1631                 enc="SEED(128)";
1632                 break;
1633         default:
1634                 enc="unknown";
1635                 break;
1636                 }
1637
1638         switch (alg_mac)
1639                 {
1640         case SSL_MD5:
1641                 mac="MD5";
1642                 break;
1643         case SSL_SHA1:
1644                 mac="SHA1";
1645                 break;
1646         case SSL_SHA256:
1647                 mac="SHA256";
1648                 break;
1649         default:
1650                 mac="unknown";
1651                 break;
1652                 }
1653
1654         if (buf == NULL)
1655                 {
1656                 len=128;
1657                 buf=OPENSSL_malloc(len);
1658                 if (buf == NULL) return("OPENSSL_malloc Error");
1659                 }
1660         else if (len < 128)
1661                 return("Buffer too small");
1662
1663 #ifdef KSSL_DEBUG
1664         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1665 #else
1666         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1667 #endif /* KSSL_DEBUG */
1668         return(buf);
1669         }
1670
1671 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1672         {
1673         int i;
1674
1675         if (c == NULL) return("(NONE)");
1676         i=(int)(c->id>>24L);
1677         if (i == 3)
1678                 return("TLSv1/SSLv3");
1679         else if (i == 2)
1680                 return("SSLv2");
1681         else
1682                 return("unknown");
1683         }
1684
1685 /* return the actual cipher being used */
1686 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1687         {
1688         if (c != NULL)
1689                 return(c->name);
1690         return("(NONE)");
1691         }
1692
1693 /* number of bits for symmetric cipher */
1694 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1695         {
1696         int ret=0;
1697
1698         if (c != NULL)
1699                 {
1700                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1701                 ret = c->strength_bits;
1702                 }
1703         return(ret);
1704         }
1705
1706 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1707         {
1708         return c->id;
1709         }
1710
1711 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1712         {
1713         SSL_COMP *ctmp;
1714         int i,nn;
1715
1716         if ((n == 0) || (sk == NULL)) return(NULL);
1717         nn=sk_SSL_COMP_num(sk);
1718         for (i=0; i<nn; i++)
1719                 {
1720                 ctmp=sk_SSL_COMP_value(sk,i);
1721                 if (ctmp->id == n)
1722                         return(ctmp);
1723                 }
1724         return(NULL);
1725         }
1726
1727 #ifdef OPENSSL_NO_COMP
1728 void *SSL_COMP_get_compression_methods(void)
1729         {
1730         return NULL;
1731         }
1732 int SSL_COMP_add_compression_method(int id, void *cm)
1733         {
1734         return 1;
1735         }
1736
1737 const char *SSL_COMP_get_name(const void *comp)
1738         {
1739         return NULL;
1740         }
1741 #else
1742 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1743         {
1744         load_builtin_compressions();
1745         return(ssl_comp_methods);
1746         }
1747
1748 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1749         {
1750         SSL_COMP *comp;
1751
1752         if (cm == NULL || cm->type == NID_undef)
1753                 return 1;
1754
1755         /* According to draft-ietf-tls-compression-04.txt, the
1756            compression number ranges should be the following:
1757
1758            0 to 63:    methods defined by the IETF
1759            64 to 192:  external party methods assigned by IANA
1760            193 to 255: reserved for private use */
1761         if (id < 193 || id > 255)
1762                 {
1763                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1764                 return 0;
1765                 }
1766
1767         MemCheck_off();
1768         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1769         comp->id=id;
1770         comp->method=cm;
1771         load_builtin_compressions();
1772         if (ssl_comp_methods
1773                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1774                 {
1775                 OPENSSL_free(comp);
1776                 MemCheck_on();
1777                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1778                 return(1);
1779                 }
1780         else if ((ssl_comp_methods == NULL)
1781                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1782                 {
1783                 OPENSSL_free(comp);
1784                 MemCheck_on();
1785                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1786                 return(1);
1787                 }
1788         else
1789                 {
1790                 MemCheck_on();
1791                 return(0);
1792                 }
1793         }
1794
1795 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1796         {
1797         if (comp)
1798                 return comp->name;
1799         return NULL;
1800         }
1801
1802 #endif