crypto/openssl/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_AES128GCM_IDX   12
 166 #define SSL_ENC_AES256GCM_IDX   13
 167 #define SSL_ENC_NUM_IDX         14
 168
 169
 170 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
 171         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
 172         };
 173
 174 #define SSL_COMP_NULL_IDX       0
 175 #define SSL_COMP_ZLIB_IDX       1
 176 #define SSL_COMP_NUM_IDX        2
 177
 178 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
 179
 180 #define SSL_MD_MD5_IDX  0
 181 #define SSL_MD_SHA1_IDX 1
 182 #define SSL_MD_GOST94_IDX 2
 183 #define SSL_MD_GOST89MAC_IDX 3
 184 #define SSL_MD_SHA256_IDX 4
 185 #define SSL_MD_SHA384_IDX 5
 186 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
 187  * defined in the
 188  * ssl_locl.h */
 189 #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST
 190 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
 191         NULL,NULL,NULL,NULL,NULL,NULL
 192         };
 193 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
 194  * implementation is engine-provided, we'll fill it only if
 195  * corresponding EVP_PKEY_METHOD is found
 196  */
 197 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
 198         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,
 199         EVP_PKEY_HMAC,EVP_PKEY_HMAC
 200         };
 201
 202 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
 203         0,0,0,0,0,0
 204         };
 205
 206 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
 207         SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
 208         SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
 209         SSL_HANDSHAKE_MAC_SHA384
 210         };
 211
 212 #define CIPHER_ADD      1
 213 #define CIPHER_KILL     2
 214 #define CIPHER_DEL      3
 215 #define CIPHER_ORD      4
 216 #define CIPHER_SPECIAL  5
 217
 218 typedef struct cipher_order_st
 219         {
 220         const SSL_CIPHER *cipher;
 221         int active;
 222         int dead;
 223         struct cipher_order_st *next,*prev;
 224         } CIPHER_ORDER;
 225
 226 static const SSL_CIPHER cipher_aliases[]={
 227         /* "ALL" doesn't include eNULL (must be specifically enabled) */
 228         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
 229         /* "COMPLEMENTOFALL" */
 230         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
 231
 232         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
 233         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
 234
 235         /* key exchange aliases
 236          * (some of those using only a single bit here combine
 237          * multiple key exchange algs according to the RFCs,
 238          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
 239         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
 240
 241         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 242         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 243         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 244         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 245         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 246
 247         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 248
 249         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 250         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 251         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 252         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 253         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 254
 255         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 256         {0,SSL_TXT_kSRP,0,    SSL_kSRP,  0,0,0,0,0,0,0,0},
 257         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
 258
 259         /* server authentication aliases */
 260         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 261         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 262         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 263         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 264         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 265         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 266         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 267         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 268         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 269         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 270         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
 271         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
 272         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
 273
 274         /* aliases combining key exchange and server authentication */
 275         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 276         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 277         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 278         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 279         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 280         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 281         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 282         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 283         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
 284
 285
 286         /* symmetric encryption aliases */
 287         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 288         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 289         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 290         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 291         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 292         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 293         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 294         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
 295         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
 296         {0,SSL_TXT_AES,0,     0,0,SSL_AES,0,0,0,0,0,0},
 297         {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
 298         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 299         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 300         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 301
 302         /* MAC aliases */
 303         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 304         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 305         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 306         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 307         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 308         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
 309         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
 310
 311         /* protocol version aliases */
 312         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 313         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 314         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 315         {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
 316
 317         /* export flag */
 318         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 319         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 320
 321         /* strength classes */
 322         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 323         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 324         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 325         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 326         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 327         /* FIPS 140-2 approved ciphersuite */
 328         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
 329         };
 330 /* Search for public key algorithm with given name and
 331  * return its pkey_id if it is available. Otherwise return 0
 332  */
 333 #ifdef OPENSSL_NO_ENGINE
 334
 335 static int get_optional_pkey_id(const char *pkey_name)
 336         {
 337         const EVP_PKEY_ASN1_METHOD *ameth;
 338         int pkey_id=0;
 339         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
 340         if (ameth)
 341                 {
 342                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 343                 }
 344         return pkey_id;
 345         }
 346
 347 #else
 348
 349 static int get_optional_pkey_id(const char *pkey_name)
 350         {
 351         const EVP_PKEY_ASN1_METHOD *ameth;
 352         ENGINE *tmpeng = NULL;
 353         int pkey_id=0;
 354         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 355         if (ameth)
 356                 {
 357                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 358                 }
 359         if (tmpeng) ENGINE_finish(tmpeng);
 360         return pkey_id;
 361         }
 362
 363 #endif
 364
 365 void ssl_load_ciphers(void)
 366         {
 367         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 368                 EVP_get_cipherbyname(SN_des_cbc);
 369         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 370                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 371         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 372                 EVP_get_cipherbyname(SN_rc4);
 373         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 374                 EVP_get_cipherbyname(SN_rc2_cbc);
 375 #ifndef OPENSSL_NO_IDEA
 376         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 377                 EVP_get_cipherbyname(SN_idea_cbc);
 378 #else
 379         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 380 #endif
 381         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 382           EVP_get_cipherbyname(SN_aes_128_cbc);
 383         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 384           EVP_get_cipherbyname(SN_aes_256_cbc);
 385         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 386           EVP_get_cipherbyname(SN_camellia_128_cbc);
 387         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 388           EVP_get_cipherbyname(SN_camellia_256_cbc);
 389         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 390           EVP_get_cipherbyname(SN_gost89_cnt);
 391         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 392           EVP_get_cipherbyname(SN_seed_cbc);
 393
 394         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
 395           EVP_get_cipherbyname(SN_aes_128_gcm);
 396         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
 397           EVP_get_cipherbyname(SN_aes_256_gcm);
 398
 399         ssl_digest_methods[SSL_MD_MD5_IDX]=
 400                 EVP_get_digestbyname(SN_md5);
 401         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 402                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 403         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
 404         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 405                 EVP_get_digestbyname(SN_sha1);
 406         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 407                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 408         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
 409         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 410                 EVP_get_digestbyname(SN_id_GostR3411_94);
 411         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 412                 {
 413                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 414                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 415                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
 416                 }
 417         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 418                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 419                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 420                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 421                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 422                 }
 423
 424         ssl_digest_methods[SSL_MD_SHA256_IDX]=
 425                 EVP_get_digestbyname(SN_sha256);
 426         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
 427                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
 428         ssl_digest_methods[SSL_MD_SHA384_IDX]=
 429                 EVP_get_digestbyname(SN_sha384);
 430         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
 431                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
 432         }
 433 #ifndef OPENSSL_NO_COMP
 434
 435 static int sk_comp_cmp(const SSL_COMP * const *a,
 436                         const SSL_COMP * const *b)
 437         {
 438         return((*a)->id-(*b)->id);
 439         }
 440
 441 static void load_builtin_compressions(void)
 442         {
 443         int got_write_lock = 0;
 444
 445         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 446         if (ssl_comp_methods == NULL)
 447                 {
 448                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 449                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 450                 got_write_lock = 1;
 451
 452                 if (ssl_comp_methods == NULL)
 453                         {
 454                         SSL_COMP *comp = NULL;
 455
 456                         MemCheck_off();
 457                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 458                         if (ssl_comp_methods != NULL)
 459                                 {
 460                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 461                                 if (comp != NULL)
 462                                         {
 463                                         comp->method=COMP_zlib();
 464                                         if (comp->method
 465                                                 && comp->method->type == NID_undef)
 466                                                 OPENSSL_free(comp);
 467                                         else
 468                                                 {
 469                                                 comp->id=SSL_COMP_ZLIB_IDX;
 470                                                 comp->name=comp->method->name;
 471                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 472                                                 }
 473                                         }
 474                                         sk_SSL_COMP_sort(ssl_comp_methods);
 475                                 }
 476                         MemCheck_on();
 477                         }
 478                 }
 479
 480         if (got_write_lock)
 481                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 482         else
 483                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 484         }
 485 #endif
 486
 487 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 488              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 489         {
 490         int i;
 491         const SSL_CIPHER *c;
 492
 493         c=s->cipher;
 494         if (c == NULL) return(0);
 495         if (comp != NULL)
 496                 {
 497                 SSL_COMP ctmp;
 498 #ifndef OPENSSL_NO_COMP
 499                 load_builtin_compressions();
 500 #endif
 501
 502                 *comp=NULL;
 503                 ctmp.id=s->compress_meth;
 504                 if (ssl_comp_methods != NULL)
 505                         {
 506                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 507                         if (i >= 0)
 508                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 509                         else
 510                                 *comp=NULL;
 511                         }
 512                 }
 513
 514         if ((enc == NULL) || (md == NULL)) return(0);
 515
 516         switch (c->algorithm_enc)
 517                 {
 518         case SSL_DES:
 519                 i=SSL_ENC_DES_IDX;
 520                 break;
 521         case SSL_3DES:
 522                 i=SSL_ENC_3DES_IDX;
 523                 break;
 524         case SSL_RC4:
 525                 i=SSL_ENC_RC4_IDX;
 526                 break;
 527         case SSL_RC2:
 528                 i=SSL_ENC_RC2_IDX;
 529                 break;
 530         case SSL_IDEA:
 531                 i=SSL_ENC_IDEA_IDX;
 532                 break;
 533         case SSL_eNULL:
 534                 i=SSL_ENC_NULL_IDX;
 535                 break;
 536         case SSL_AES128:
 537                 i=SSL_ENC_AES128_IDX;
 538                 break;
 539         case SSL_AES256:
 540                 i=SSL_ENC_AES256_IDX;
 541                 break;
 542         case SSL_CAMELLIA128:
 543                 i=SSL_ENC_CAMELLIA128_IDX;
 544                 break;
 545         case SSL_CAMELLIA256:
 546                 i=SSL_ENC_CAMELLIA256_IDX;
 547                 break;
 548         case SSL_eGOST2814789CNT:
 549                 i=SSL_ENC_GOST89_IDX;
 550                 break;
 551         case SSL_SEED:
 552                 i=SSL_ENC_SEED_IDX;
 553                 break;
 554         case SSL_AES128GCM:
 555                 i=SSL_ENC_AES128GCM_IDX;
 556                 break;
 557         case SSL_AES256GCM:
 558                 i=SSL_ENC_AES256GCM_IDX;
 559                 break;
 560         default:
 561                 i= -1;
 562                 break;
 563                 }
 564
 565         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 566                 *enc=NULL;
 567         else
 568                 {
 569                 if (i == SSL_ENC_NULL_IDX)
 570                         *enc=EVP_enc_null();
 571                 else
 572                         *enc=ssl_cipher_methods[i];
 573                 }
 574
 575         switch (c->algorithm_mac)
 576                 {
 577         case SSL_MD5:
 578                 i=SSL_MD_MD5_IDX;
 579                 break;
 580         case SSL_SHA1:
 581                 i=SSL_MD_SHA1_IDX;
 582                 break;
 583         case SSL_SHA256:
 584                 i=SSL_MD_SHA256_IDX;
 585                 break;
 586         case SSL_SHA384:
 587                 i=SSL_MD_SHA384_IDX;
 588                 break;
 589         case SSL_GOST94:
 590                 i = SSL_MD_GOST94_IDX;
 591                 break;
 592         case SSL_GOST89MAC:
 593                 i = SSL_MD_GOST89MAC_IDX;
 594                 break;
 595         default:
 596                 i= -1;
 597                 break;
 598                 }
 599         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 600         {
 601                 *md=NULL;
 602                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 603                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 604                 if (c->algorithm_mac == SSL_AEAD)
 605                         mac_pkey_type = NULL;
 606         }
 607         else
 608         {
 609                 *md=ssl_digest_methods[i];
 610                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 611                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 612         }
 613
 614         if ((*enc != NULL) &&
 615             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
 616             (!mac_pkey_type||*mac_pkey_type != NID_undef))
 617                 {
 618                 const EVP_CIPHER *evp;
 619
 620                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
 621                     s->ssl_version < TLS1_VERSION)
 622                         return 1;
 623
 624 #ifdef OPENSSL_FIPS
 625                 if (FIPS_mode())
 626                         return 1;
 627 #endif
 628
 629                 if      (c->algorithm_enc == SSL_RC4 &&
 630                          c->algorithm_mac == SSL_MD5 &&
 631                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
 632                         *enc = evp, *md = NULL;
 633                 else if (c->algorithm_enc == SSL_AES128 &&
 634                          c->algorithm_mac == SSL_SHA1 &&
 635                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
 636                         *enc = evp, *md = NULL;
 637                 else if (c->algorithm_enc == SSL_AES256 &&
 638                          c->algorithm_mac == SSL_SHA1 &&
 639                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
 640                         *enc = evp, *md = NULL;
 641                 return(1);
 642                 }
 643         else
 644                 return(0);
 645         }
 646
 647 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 648 {
 649         if (idx <0||idx>=SSL_MD_NUM_IDX)
 650                 {
 651                 return 0;
 652                 }
 653         *mask = ssl_handshake_digest_flag[idx];
 654         if (*mask)
 655                 *md = ssl_digest_methods[idx];
 656         else
 657                 *md = NULL;
 658         return 1;
 659 }
 660
 661 #define ITEM_SEP(a) \
 662         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 663
 664 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 665              CIPHER_ORDER **tail)
 666         {
 667         if (curr == *tail) return;
 668         if (curr == *head)
 669                 *head=curr->next;
 670         if (curr->prev != NULL)
 671                 curr->prev->next=curr->next;
 672         if (curr->next != NULL)
 673                 curr->next->prev=curr->prev;
 674         (*tail)->next=curr;
 675         curr->prev= *tail;
 676         curr->next=NULL;
 677         *tail=curr;
 678         }
 679
 680 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 681              CIPHER_ORDER **tail)
 682         {
 683         if (curr == *head) return;
 684         if (curr == *tail)
 685                 *tail=curr->prev;
 686         if (curr->next != NULL)
 687                 curr->next->prev=curr->prev;
 688         if (curr->prev != NULL)
 689                 curr->prev->next=curr->next;
 690         (*head)->prev=curr;
 691         curr->next= *head;
 692         curr->prev=NULL;
 693         *head=curr;
 694         }
 695
 696 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 697         {
 698         *mkey = 0;
 699         *auth = 0;
 700         *enc = 0;
 701         *mac = 0;
 702         *ssl = 0;
 703
 704 #ifdef OPENSSL_NO_RSA
 705         *mkey |= SSL_kRSA;
 706         *auth |= SSL_aRSA;
 707 #endif
 708 #ifdef OPENSSL_NO_DSA
 709         *auth |= SSL_aDSS;
 710 #endif
 711         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 712         *auth |= SSL_aDH;
 713 #ifdef OPENSSL_NO_DH
 714         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 715         *auth |= SSL_aDH;
 716 #endif
 717 #ifdef OPENSSL_NO_KRB5
 718         *mkey |= SSL_kKRB5;
 719         *auth |= SSL_aKRB5;
 720 #endif
 721 #ifdef OPENSSL_NO_ECDSA
 722         *auth |= SSL_aECDSA;
 723 #endif
 724 #ifdef OPENSSL_NO_ECDH
 725         *mkey |= SSL_kECDHe|SSL_kECDHr;
 726         *auth |= SSL_aECDH;
 727 #endif
 728 #ifdef OPENSSL_NO_PSK
 729         *mkey |= SSL_kPSK;
 730         *auth |= SSL_aPSK;
 731 #endif
 732 #ifdef OPENSSL_NO_SRP
 733         *mkey |= SSL_kSRP;
 734 #endif
 735         /* Check for presence of GOST 34.10 algorithms, and if they
 736          * do not present, disable  appropriate auth and key exchange */
 737         if (!get_optional_pkey_id("gost94")) {
 738                 *auth |= SSL_aGOST94;
 739         }
 740         if (!get_optional_pkey_id("gost2001")) {
 741                 *auth |= SSL_aGOST01;
 742         }
 743         /* Disable GOST key exchange if no GOST signature algs are available * */
 744         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 745                 *mkey |= SSL_kGOST;
 746         }
 747 #ifdef SSL_FORBID_ENULL
 748         *enc |= SSL_eNULL;
 749 #endif
 750
 751
 752
 753         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 754         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 755         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 756         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 757         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 758         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 759         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 760         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
 761         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
 762         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 763         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 764         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 765         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 766
 767         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 768         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 769         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
 770         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
 771         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 772         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 773
 774         }
 775
 776 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 777                 int num_of_ciphers,
 778                 unsigned long disabled_mkey, unsigned long disabled_auth,
 779                 unsigned long disabled_enc, unsigned long disabled_mac,
 780                 unsigned long disabled_ssl,
 781                 CIPHER_ORDER *co_list,
 782                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 783         {
 784         int i, co_list_num;
 785         const SSL_CIPHER *c;
 786
 787         /*
 788          * We have num_of_ciphers descriptions compiled in, depending on the
 789          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 790          * These will later be sorted in a linked list with at most num
 791          * entries.
 792          */
 793
 794         /* Get the initial list of ciphers */
 795         co_list_num = 0;        /* actual count of ciphers */
 796         for (i = 0; i < num_of_ciphers; i++)
 797                 {
 798                 c = ssl_method->get_cipher(i);
 799                 /* drop those that use any of that is not available */
 800                 if ((c != NULL) && c->valid &&
 801 #ifdef OPENSSL_FIPS
 802                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
 803 #endif
 804                     !(c->algorithm_mkey & disabled_mkey) &&
 805                     !(c->algorithm_auth & disabled_auth) &&
 806                     !(c->algorithm_enc & disabled_enc) &&
 807                     !(c->algorithm_mac & disabled_mac) &&
 808                     !(c->algorithm_ssl & disabled_ssl))
 809                         {
 810                         co_list[co_list_num].cipher = c;
 811                         co_list[co_list_num].next = NULL;
 812                         co_list[co_list_num].prev = NULL;
 813                         co_list[co_list_num].active = 0;
 814                         co_list_num++;
 815 #ifdef KSSL_DEBUG
 816                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 817 #endif  /* KSSL_DEBUG */
 818                         /*
 819                         if (!sk_push(ca_list,(char *)c)) goto err;
 820                         */
 821                         }
 822                 }
 823
 824         /*
 825          * Prepare linked list from list entries
 826          */
 827         if (co_list_num > 0)
 828                 {
 829                 co_list[0].prev = NULL;
 830
 831                 if (co_list_num > 1)
 832                         {
 833                         co_list[0].next = &co_list[1];
 834
 835                         for (i = 1; i < co_list_num - 1; i++)
 836                                 {
 837                                 co_list[i].prev = &co_list[i - 1];
 838                                 co_list[i].next = &co_list[i + 1];
 839                                 }
 840
 841                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 842                         }
 843
 844                 co_list[co_list_num - 1].next = NULL;
 845
 846                 *head_p = &co_list[0];
 847                 *tail_p = &co_list[co_list_num - 1];
 848                 }
 849         }
 850
 851 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
 852                         int num_of_group_aliases,
 853                         unsigned long disabled_mkey, unsigned long disabled_auth,
 854                         unsigned long disabled_enc, unsigned long disabled_mac,
 855                         unsigned long disabled_ssl,
 856                         CIPHER_ORDER *head)
 857         {
 858         CIPHER_ORDER *ciph_curr;
 859         const SSL_CIPHER **ca_curr;
 860         int i;
 861         unsigned long mask_mkey = ~disabled_mkey;
 862         unsigned long mask_auth = ~disabled_auth;
 863         unsigned long mask_enc = ~disabled_enc;
 864         unsigned long mask_mac = ~disabled_mac;
 865         unsigned long mask_ssl = ~disabled_ssl;
 866
 867         /*
 868          * First, add the real ciphers as already collected
 869          */
 870         ciph_curr = head;
 871         ca_curr = ca_list;
 872         while (ciph_curr != NULL)
 873                 {
 874                 *ca_curr = ciph_curr->cipher;
 875                 ca_curr++;
 876                 ciph_curr = ciph_curr->next;
 877                 }
 878
 879         /*
 880          * Now we add the available ones from the cipher_aliases[] table.
 881          * They represent either one or more algorithms, some of which
 882          * in any affected category must be supported (set in enabled_mask),
 883          * or represent a cipher strength value (will be added in any case because algorithms=0).
 884          */
 885         for (i = 0; i < num_of_group_aliases; i++)
 886                 {
 887                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 888                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 889                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 890                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 891                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 892
 893                 if (algorithm_mkey)
 894                         if ((algorithm_mkey & mask_mkey) == 0)
 895                                 continue;
 896
 897                 if (algorithm_auth)
 898                         if ((algorithm_auth & mask_auth) == 0)
 899                                 continue;
 900
 901                 if (algorithm_enc)
 902                         if ((algorithm_enc & mask_enc) == 0)
 903                                 continue;
 904
 905                 if (algorithm_mac)
 906                         if ((algorithm_mac & mask_mac) == 0)
 907                                 continue;
 908
 909                 if (algorithm_ssl)
 910                         if ((algorithm_ssl & mask_ssl) == 0)
 911                                 continue;
 912
 913                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 914                 ca_curr++;
 915                 }
 916
 917         *ca_curr = NULL;        /* end of list */
 918         }
 919
 920 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 921                 unsigned long alg_mkey, unsigned long alg_auth,
 922                 unsigned long alg_enc, unsigned long alg_mac,
 923                 unsigned long alg_ssl,
 924                 unsigned long algo_strength,
 925                 int rule, int strength_bits,
 926                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 927         {
 928         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 929         const SSL_CIPHER *cp;
 930         int reverse = 0;
 931
 932 #ifdef CIPHER_DEBUG
 933         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 934                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 935 #endif
 936
 937         if (rule == CIPHER_DEL)
 938                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 939
 940         head = *head_p;
 941         tail = *tail_p;
 942
 943         if (reverse)
 944                 {
 945                 curr = tail;
 946                 last = head;
 947                 }
 948         else
 949                 {
 950                 curr = head;
 951                 last = tail;
 952                 }
 953
 954         curr2 = curr;
 955         for (;;)
 956                 {
 957                 if ((curr == NULL) || (curr == last)) break;
 958                 curr = curr2;
 959                 curr2 = reverse ? curr->prev : curr->next;
 960
 961                 cp = curr->cipher;
 962
 963                 /*
 964                  * Selection criteria is either the value of strength_bits
 965                  * or the algorithms used.
 966                  */
 967                 if (strength_bits >= 0)
 968                         {
 969                         if (strength_bits != cp->strength_bits)
 970                                 continue;
 971                         }
 972                 else
 973                         {
 974 #ifdef CIPHER_DEBUG
 975                         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);
 976 #endif
 977
 978                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 979                                 continue;
 980                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 981                                 continue;
 982                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 983                                 continue;
 984                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 985                                 continue;
 986                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 987                                 continue;
 988                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 989                                 continue;
 990                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 991                                 continue;
 992                         }
 993
 994 #ifdef CIPHER_DEBUG
 995                 printf("Action = %d\n", rule);
 996 #endif
 997
 998                 /* add the cipher if it has not been added yet. */
 999                 if (rule == CIPHER_ADD)
1000                         {
1001                         /* reverse == 0 */
1002                         if (!curr->active)
1003                                 {
1004                                 ll_append_tail(&head, curr, &tail);
1005                                 curr->active = 1;
1006                                 }
1007                         }
1008                 /* Move the added cipher to this location */
1009                 else if (rule == CIPHER_ORD)
1010                         {
1011                         /* reverse == 0 */
1012                         if (curr->active)
1013                                 {
1014                                 ll_append_tail(&head, curr, &tail);
1015                                 }
1016                         }
1017                 else if (rule == CIPHER_DEL)
1018                         {
1019                         /* reverse == 1 */
1020                         if (curr->active)
1021                                 {
1022                                 /* most recently deleted ciphersuites get best positions
1023                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1024                                  * works in reverse to maintain the order) */
1025                                 ll_append_head(&head, curr, &tail);
1026                                 curr->active = 0;
1027                                 }
1028                         }
1029                 else if (rule == CIPHER_KILL)
1030                         {
1031                         /* reverse == 0 */
1032                         if (head == curr)
1033                                 head = curr->next;
1034                         else
1035                                 curr->prev->next = curr->next;
1036                         if (tail == curr)
1037                                 tail = curr->prev;
1038                         curr->active = 0;
1039                         if (curr->next != NULL)
1040                                 curr->next->prev = curr->prev;
1041                         if (curr->prev != NULL)
1042                                 curr->prev->next = curr->next;
1043                         curr->next = NULL;
1044                         curr->prev = NULL;
1045                         }
1046                 }
1047
1048         *head_p = head;
1049         *tail_p = tail;
1050         }
1051
1052 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1053                                     CIPHER_ORDER **tail_p)
1054         {
1055         int max_strength_bits, i, *number_uses;
1056         CIPHER_ORDER *curr;
1057
1058         /*
1059          * This routine sorts the ciphers with descending strength. The sorting
1060          * must keep the pre-sorted sequence, so we apply the normal sorting
1061          * routine as '+' movement to the end of the list.
1062          */
1063         max_strength_bits = 0;
1064         curr = *head_p;
1065         while (curr != NULL)
1066                 {
1067                 if (curr->active &&
1068                     (curr->cipher->strength_bits > max_strength_bits))
1069                     max_strength_bits = curr->cipher->strength_bits;
1070                 curr = curr->next;
1071                 }
1072
1073         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1074         if (!number_uses)
1075                 {
1076                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1077                 return(0);
1078                 }
1079         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1080
1081         /*
1082          * Now find the strength_bits values actually used
1083          */
1084         curr = *head_p;
1085         while (curr != NULL)
1086                 {
1087                 if (curr->active)
1088                         number_uses[curr->cipher->strength_bits]++;
1089                 curr = curr->next;
1090                 }
1091         /*
1092          * Go through the list of used strength_bits values in descending
1093          * order.
1094          */
1095         for (i = max_strength_bits; i >= 0; i--)
1096                 if (number_uses[i] > 0)
1097                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1098
1099         OPENSSL_free(number_uses);
1100         return(1);
1101         }
1102
1103 static int ssl_cipher_process_rulestr(const char *rule_str,
1104                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1105                 const SSL_CIPHER **ca_list)
1106         {
1107         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1108         const char *l, *buf;
1109         int j, multi, found, rule, retval, ok, buflen;
1110         unsigned long cipher_id = 0;
1111         char ch;
1112
1113         retval = 1;
1114         l = rule_str;
1115         for (;;)
1116                 {
1117                 ch = *l;
1118
1119                 if (ch == '\0')
1120                         break;          /* done */
1121                 if (ch == '-')
1122                         { rule = CIPHER_DEL; l++; }
1123                 else if (ch == '+')
1124                         { rule = CIPHER_ORD; l++; }
1125                 else if (ch == '!')
1126                         { rule = CIPHER_KILL; l++; }
1127                 else if (ch == '@')
1128                         { rule = CIPHER_SPECIAL; l++; }
1129                 else
1130                         { rule = CIPHER_ADD; }
1131
1132                 if (ITEM_SEP(ch))
1133                         {
1134                         l++;
1135                         continue;
1136                         }
1137
1138                 alg_mkey = 0;
1139                 alg_auth = 0;
1140                 alg_enc = 0;
1141                 alg_mac = 0;
1142                 alg_ssl = 0;
1143                 algo_strength = 0;
1144
1145                 for (;;)
1146                         {
1147                         ch = *l;
1148                         buf = l;
1149                         buflen = 0;
1150 #ifndef CHARSET_EBCDIC
1151                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1152                                 ((ch >= '0') && (ch <= '9')) ||
1153                                 ((ch >= 'a') && (ch <= 'z')) ||
1154                                  (ch == '-') || (ch == '.'))
1155 #else
1156                         while ( isalnum(ch) || (ch == '-') || (ch == '.'))
1157 #endif
1158                                  {
1159                                  ch = *(++l);
1160                                  buflen++;
1161                                  }
1162
1163                         if (buflen == 0)
1164                                 {
1165                                 /*
1166                                  * We hit something we cannot deal with,
1167                                  * it is no command or separator nor
1168                                  * alphanumeric, so we call this an error.
1169                                  */
1170                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1171                                        SSL_R_INVALID_COMMAND);
1172                                 retval = found = 0;
1173                                 l++;
1174                                 break;
1175                                 }
1176
1177                         if (rule == CIPHER_SPECIAL)
1178                                 {
1179                                 found = 0; /* unused -- avoid compiler warning */
1180                                 break;  /* special treatment */
1181                                 }
1182
1183                         /* check for multi-part specification */
1184                         if (ch == '+')
1185                                 {
1186                                 multi=1;
1187                                 l++;
1188                                 }
1189                         else
1190                                 multi=0;
1191
1192                         /*
1193                          * Now search for the cipher alias in the ca_list. Be careful
1194                          * with the strncmp, because the "buflen" limitation
1195                          * will make the rule "ADH:SOME" and the cipher
1196                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1197                          * So additionally check whether the cipher name found
1198                          * has the correct length. We can save a strlen() call:
1199                          * just checking for the '\0' at the right place is
1200                          * sufficient, we have to strncmp() anyway. (We cannot
1201                          * use strcmp(), because buf is not '\0' terminated.)
1202                          */
1203                         j = found = 0;
1204                         cipher_id = 0;
1205                         while (ca_list[j])
1206                                 {
1207                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1208                                     (ca_list[j]->name[buflen] == '\0'))
1209                                         {
1210                                         found = 1;
1211                                         break;
1212                                         }
1213                                 else
1214                                         j++;
1215                                 }
1216
1217                         if (!found)
1218                                 break;  /* ignore this entry */
1219
1220                         if (ca_list[j]->algorithm_mkey)
1221                                 {
1222                                 if (alg_mkey)
1223                                         {
1224                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1225                                         if (!alg_mkey) { found = 0; break; }
1226                                         }
1227                                 else
1228                                         alg_mkey = ca_list[j]->algorithm_mkey;
1229                                 }
1230
1231                         if (ca_list[j]->algorithm_auth)
1232                                 {
1233                                 if (alg_auth)
1234                                         {
1235                                         alg_auth &= ca_list[j]->algorithm_auth;
1236                                         if (!alg_auth) { found = 0; break; }
1237                                         }
1238                                 else
1239                                         alg_auth = ca_list[j]->algorithm_auth;
1240                                 }
1241
1242                         if (ca_list[j]->algorithm_enc)
1243                                 {
1244                                 if (alg_enc)
1245                                         {
1246                                         alg_enc &= ca_list[j]->algorithm_enc;
1247                                         if (!alg_enc) { found = 0; break; }
1248                                         }
1249                                 else
1250                                         alg_enc = ca_list[j]->algorithm_enc;
1251                                 }
1252
1253                         if (ca_list[j]->algorithm_mac)
1254                                 {
1255                                 if (alg_mac)
1256                                         {
1257                                         alg_mac &= ca_list[j]->algorithm_mac;
1258                                         if (!alg_mac) { found = 0; break; }
1259                                         }
1260                                 else
1261                                         alg_mac = ca_list[j]->algorithm_mac;
1262                                 }
1263
1264                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1265                                 {
1266                                 if (algo_strength & SSL_EXP_MASK)
1267                                         {
1268                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1269                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1270                                         }
1271                                 else
1272                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1273                                 }
1274
1275                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1276                                 {
1277                                 if (algo_strength & SSL_STRONG_MASK)
1278                                         {
1279                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1280                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1281                                         }
1282                                 else
1283                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1284                                 }
1285
1286                         if (ca_list[j]->valid)
1287                                 {
1288                                 /* explicit ciphersuite found; its protocol version
1289                                  * does not become part of the search pattern!*/
1290
1291                                 cipher_id = ca_list[j]->id;
1292                                 }
1293                         else
1294                                 {
1295                                 /* not an explicit ciphersuite; only in this case, the
1296                                  * protocol version is considered part of the search pattern */
1297
1298                                 if (ca_list[j]->algorithm_ssl)
1299                                         {
1300                                         if (alg_ssl)
1301                                                 {
1302                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1303                                                 if (!alg_ssl) { found = 0; break; }
1304                                                 }
1305                                         else
1306                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1307                                         }
1308                                 }
1309
1310                         if (!multi) break;
1311                         }
1312
1313                 /*
1314                  * Ok, we have the rule, now apply it
1315                  */
1316                 if (rule == CIPHER_SPECIAL)
1317                         {       /* special command */
1318                         ok = 0;
1319                         if ((buflen == 8) &&
1320                                 !strncmp(buf, "STRENGTH", 8))
1321                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1322                         else
1323                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1324                                         SSL_R_INVALID_COMMAND);
1325                         if (ok == 0)
1326                                 retval = 0;
1327                         /*
1328                          * We do not support any "multi" options
1329                          * together with "@", so throw away the
1330                          * rest of the command, if any left, until
1331                          * end or ':' is found.
1332                          */
1333                         while ((*l != '\0') && !ITEM_SEP(*l))
1334                                 l++;
1335                         }
1336                 else if (found)
1337                         {
1338                         ssl_cipher_apply_rule(cipher_id,
1339                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1340                                 rule, -1, head_p, tail_p);
1341                         }
1342                 else
1343                         {
1344                         while ((*l != '\0') && !ITEM_SEP(*l))
1345                                 l++;
1346                         }
1347                 if (*l == '\0') break; /* done */
1348                 }
1349
1350         return(retval);
1351         }
1352
1353 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1354                 STACK_OF(SSL_CIPHER) **cipher_list,
1355                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1356                 const char *rule_str)
1357         {
1358         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1359         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1360         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1361         const char *rule_p;
1362         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1363         const SSL_CIPHER **ca_list = NULL;
1364
1365         /*
1366          * Return with error if nothing to do.
1367          */
1368         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1369                 return NULL;
1370
1371         /*
1372          * To reduce the work to do we only want to process the compiled
1373          * in algorithms, so we first get the mask of disabled ciphers.
1374          */
1375         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1376
1377         /*
1378          * Now we have to collect the available ciphers from the compiled
1379          * in ciphers. We cannot get more than the number compiled in, so
1380          * it is used for allocation.
1381          */
1382         num_of_ciphers = ssl_method->num_ciphers();
1383 #ifdef KSSL_DEBUG
1384         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1385 #endif    /* KSSL_DEBUG */
1386         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1387         if (co_list == NULL)
1388                 {
1389                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1390                 return(NULL);   /* Failure */
1391                 }
1392
1393         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1394                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1395                                    co_list, &head, &tail);
1396
1397
1398         /* Now arrange all ciphers by preference: */
1399
1400         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1401         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1402         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1403
1404         /* AES is our preferred symmetric cipher */
1405         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1406
1407         /* Temporarily enable everything else for sorting */
1408         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1409
1410         /* Low priority for MD5 */
1411         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1412
1413         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1414          * (For applications that allow them, they aren't too bad, but we prefer
1415          * authenticated ciphers.) */
1416         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1417
1418         /* Move ciphers without forward secrecy to the end */
1419         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1420         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1421         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1422         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1423         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1424
1425         /* RC4 is sort-of broken -- move the the end */
1426         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1427
1428         /* Now sort by symmetric encryption strength.  The above ordering remains
1429          * in force within each class */
1430         if (!ssl_cipher_strength_sort(&head, &tail))
1431                 {
1432                 OPENSSL_free(co_list);
1433                 return NULL;
1434                 }
1435
1436         /* Now disable everything (maintaining the ordering!) */
1437         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1438
1439
1440         /*
1441          * We also need cipher aliases for selecting based on the rule_str.
1442          * There might be two types of entries in the rule_str: 1) names
1443          * of ciphers themselves 2) aliases for groups of ciphers.
1444          * For 1) we need the available ciphers and for 2) the cipher
1445          * groups of cipher_aliases added together in one list (otherwise
1446          * we would be happy with just the cipher_aliases table).
1447          */
1448         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1449         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1450         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1451         if (ca_list == NULL)
1452                 {
1453                 OPENSSL_free(co_list);
1454                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1455                 return(NULL);   /* Failure */
1456                 }
1457         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1458                                    disabled_mkey, disabled_auth, disabled_enc,
1459                                    disabled_mac, disabled_ssl, head);
1460
1461         /*
1462          * If the rule_string begins with DEFAULT, apply the default rule
1463          * before using the (possibly available) additional rules.
1464          */
1465         ok = 1;
1466         rule_p = rule_str;
1467         if (strncmp(rule_str,"DEFAULT",7) == 0)
1468                 {
1469                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1470                         &head, &tail, ca_list);
1471                 rule_p += 7;
1472                 if (*rule_p == ':')
1473                         rule_p++;
1474                 }
1475
1476         if (ok && (strlen(rule_p) > 0))
1477                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1478
1479         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1480
1481         if (!ok)
1482                 {       /* Rule processing failure */
1483                 OPENSSL_free(co_list);
1484                 return(NULL);
1485                 }
1486
1487         /*
1488          * Allocate new "cipherstack" for the result, return with error
1489          * if we cannot get one.
1490          */
1491         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1492                 {
1493                 OPENSSL_free(co_list);
1494                 return(NULL);
1495                 }
1496
1497         /*
1498          * The cipher selection for the list is done. The ciphers are added
1499          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1500          */
1501         for (curr = head; curr != NULL; curr = curr->next)
1502                 {
1503 #ifdef OPENSSL_FIPS
1504                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1505 #else
1506                 if (curr->active)
1507 #endif
1508                         {
1509                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1510 #ifdef CIPHER_DEBUG
1511                         printf("<%s>\n",curr->cipher->name);
1512 #endif
1513                         }
1514                 }
1515         OPENSSL_free(co_list);  /* Not needed any longer */
1516
1517         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1518         if (tmp_cipher_list == NULL)
1519                 {
1520                 sk_SSL_CIPHER_free(cipherstack);
1521                 return NULL;
1522                 }
1523         if (*cipher_list != NULL)
1524                 sk_SSL_CIPHER_free(*cipher_list);
1525         *cipher_list = cipherstack;
1526         if (*cipher_list_by_id != NULL)
1527                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1528         *cipher_list_by_id = tmp_cipher_list;
1529         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1530
1531         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1532         return(cipherstack);
1533         }
1534
1535 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1536         {
1537         int is_export,pkl,kl;
1538         const char *ver,*exp_str;
1539         const char *kx,*au,*enc,*mac;
1540         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1541 #ifdef KSSL_DEBUG
1542         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1543 #else
1544         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1545 #endif /* KSSL_DEBUG */
1546
1547         alg_mkey = cipher->algorithm_mkey;
1548         alg_auth = cipher->algorithm_auth;
1549         alg_enc = cipher->algorithm_enc;
1550         alg_mac = cipher->algorithm_mac;
1551         alg_ssl = cipher->algorithm_ssl;
1552
1553         alg2=cipher->algorithm2;
1554
1555         is_export=SSL_C_IS_EXPORT(cipher);
1556         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1557         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1558         exp_str=is_export?" export":"";
1559
1560         if (alg_ssl & SSL_SSLV2)
1561                 ver="SSLv2";
1562         else if (alg_ssl & SSL_SSLV3)
1563                 ver="SSLv3";
1564         else if (alg_ssl & SSL_TLSV1_2)
1565                 ver="TLSv1.2";
1566         else
1567                 ver="unknown";
1568
1569         switch (alg_mkey)
1570                 {
1571         case SSL_kRSA:
1572                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1573                 break;
1574         case SSL_kDHr:
1575                 kx="DH/RSA";
1576                 break;
1577         case SSL_kDHd:
1578                 kx="DH/DSS";
1579                 break;
1580         case SSL_kKRB5:
1581                 kx="KRB5";
1582                 break;
1583         case SSL_kEDH:
1584                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1585                 break;
1586         case SSL_kECDHr:
1587                 kx="ECDH/RSA";
1588                 break;
1589         case SSL_kECDHe:
1590                 kx="ECDH/ECDSA";
1591                 break;
1592         case SSL_kEECDH:
1593                 kx="ECDH";
1594                 break;
1595         case SSL_kPSK:
1596                 kx="PSK";
1597                 break;
1598         case SSL_kSRP:
1599                 kx="SRP";
1600                 break;
1601         default:
1602                 kx="unknown";
1603                 }
1604
1605         switch (alg_auth)
1606                 {
1607         case SSL_aRSA:
1608                 au="RSA";
1609                 break;
1610         case SSL_aDSS:
1611                 au="DSS";
1612                 break;
1613         case SSL_aDH:
1614                 au="DH";
1615                 break;
1616         case SSL_aKRB5:
1617                 au="KRB5";
1618                 break;
1619         case SSL_aECDH:
1620                 au="ECDH";
1621                 break;
1622         case SSL_aNULL:
1623                 au="None";
1624                 break;
1625         case SSL_aECDSA:
1626                 au="ECDSA";
1627                 break;
1628         case SSL_aPSK:
1629                 au="PSK";
1630                 break;
1631         default:
1632                 au="unknown";
1633                 break;
1634                 }
1635
1636         switch (alg_enc)
1637                 {
1638         case SSL_DES:
1639                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1640                 break;
1641         case SSL_3DES:
1642                 enc="3DES(168)";
1643                 break;
1644         case SSL_RC4:
1645                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1646                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1647                 break;
1648         case SSL_RC2:
1649                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1650                 break;
1651         case SSL_IDEA:
1652                 enc="IDEA(128)";
1653                 break;
1654         case SSL_eNULL:
1655                 enc="None";
1656                 break;
1657         case SSL_AES128:
1658                 enc="AES(128)";
1659                 break;
1660         case SSL_AES256:
1661                 enc="AES(256)";
1662                 break;
1663         case SSL_AES128GCM:
1664                 enc="AESGCM(128)";
1665                 break;
1666         case SSL_AES256GCM:
1667                 enc="AESGCM(256)";
1668                 break;
1669         case SSL_CAMELLIA128:
1670                 enc="Camellia(128)";
1671                 break;
1672         case SSL_CAMELLIA256:
1673                 enc="Camellia(256)";
1674                 break;
1675         case SSL_SEED:
1676                 enc="SEED(128)";
1677                 break;
1678         default:
1679                 enc="unknown";
1680                 break;
1681                 }
1682
1683         switch (alg_mac)
1684                 {
1685         case SSL_MD5:
1686                 mac="MD5";
1687                 break;
1688         case SSL_SHA1:
1689                 mac="SHA1";
1690                 break;
1691         case SSL_SHA256:
1692                 mac="SHA256";
1693                 break;
1694         case SSL_SHA384:
1695                 mac="SHA384";
1696                 break;
1697         case SSL_AEAD:
1698                 mac="AEAD";
1699                 break;
1700         default:
1701                 mac="unknown";
1702                 break;
1703                 }
1704
1705         if (buf == NULL)
1706                 {
1707                 len=128;
1708                 buf=OPENSSL_malloc(len);
1709                 if (buf == NULL) return("OPENSSL_malloc Error");
1710                 }
1711         else if (len < 128)
1712                 return("Buffer too small");
1713
1714 #ifdef KSSL_DEBUG
1715         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1716 #else
1717         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1718 #endif /* KSSL_DEBUG */
1719         return(buf);
1720         }
1721
1722 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1723         {
1724         int i;
1725
1726         if (c == NULL) return("(NONE)");
1727         i=(int)(c->id>>24L);
1728         if (i == 3)
1729                 return("TLSv1/SSLv3");
1730         else if (i == 2)
1731                 return("SSLv2");
1732         else
1733                 return("unknown");
1734         }
1735
1736 /* return the actual cipher being used */
1737 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1738         {
1739         if (c != NULL)
1740                 return(c->name);
1741         return("(NONE)");
1742         }
1743
1744 /* number of bits for symmetric cipher */
1745 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1746         {
1747         int ret=0;
1748
1749         if (c != NULL)
1750                 {
1751                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1752                 ret = c->strength_bits;
1753                 }
1754         return(ret);
1755         }
1756
1757 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1758         {
1759         return c->id;
1760         }
1761
1762 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1763         {
1764         SSL_COMP *ctmp;
1765         int i,nn;
1766
1767         if ((n == 0) || (sk == NULL)) return(NULL);
1768         nn=sk_SSL_COMP_num(sk);
1769         for (i=0; i<nn; i++)
1770                 {
1771                 ctmp=sk_SSL_COMP_value(sk,i);
1772                 if (ctmp->id == n)
1773                         return(ctmp);
1774                 }
1775         return(NULL);
1776         }
1777
1778 #ifdef OPENSSL_NO_COMP
1779 void *SSL_COMP_get_compression_methods(void)
1780         {
1781         return NULL;
1782         }
1783 int SSL_COMP_add_compression_method(int id, void *cm)
1784         {
1785         return 1;
1786         }
1787
1788 const char *SSL_COMP_get_name(const void *comp)
1789         {
1790         return NULL;
1791         }
1792 #else
1793 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1794         {
1795         load_builtin_compressions();
1796         return(ssl_comp_methods);
1797         }
1798
1799 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1800         {
1801         SSL_COMP *comp;
1802
1803         if (cm == NULL || cm->type == NID_undef)
1804                 return 1;
1805
1806         /* According to draft-ietf-tls-compression-04.txt, the
1807            compression number ranges should be the following:
1808
1809            0 to 63:    methods defined by the IETF
1810            64 to 192:  external party methods assigned by IANA
1811            193 to 255: reserved for private use */
1812         if (id < 193 || id > 255)
1813                 {
1814                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1815                 return 0;
1816                 }
1817
1818         MemCheck_off();
1819         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1820         comp->id=id;
1821         comp->method=cm;
1822         load_builtin_compressions();
1823         if (ssl_comp_methods
1824                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1825                 {
1826                 OPENSSL_free(comp);
1827                 MemCheck_on();
1828                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1829                 return(1);
1830                 }
1831         else if ((ssl_comp_methods == NULL)
1832                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1833                 {
1834                 OPENSSL_free(comp);
1835                 MemCheck_on();
1836                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1837                 return(1);
1838                 }
1839         else
1840                 {
1841                 MemCheck_on();
1842                 return(0);
1843                 }
1844         }
1845
1846 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1847         {
1848         if (comp)
1849                 return comp->name;
1850         return NULL;
1851         }
1852
1853 #endif