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},
 242         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0},
 243         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0},
 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         {0,SSL_TXT_CHACHA20   ,0,0,0,SSL_CHACHA20POLY1305,0,0,0,0,0,0},
 302
 303         /* MAC aliases */
 304         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 305         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 306         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 307         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 308         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 309         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
 310         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
 311
 312         /* protocol version aliases */
 313         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 314         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 315         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 316         {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
 317
 318         /* export flag */
 319         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 320         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 321
 322         /* strength classes */
 323         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 324         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 325         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 326         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 327         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 328         /* FIPS 140-2 approved ciphersuite */
 329         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
 330         };
 331 /* Search for public key algorithm with given name and
 332  * return its pkey_id if it is available. Otherwise return 0
 333  */
 334 #ifdef OPENSSL_NO_ENGINE
 335
 336 static int get_optional_pkey_id(const char *pkey_name)
 337         {
 338         const EVP_PKEY_ASN1_METHOD *ameth;
 339         int pkey_id=0;
 340         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
 341         if (ameth)
 342                 {
 343                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 344                 }
 345         return pkey_id;
 346         }
 347
 348 #else
 349
 350 static int get_optional_pkey_id(const char *pkey_name)
 351         {
 352         const EVP_PKEY_ASN1_METHOD *ameth;
 353         ENGINE *tmpeng = NULL;
 354         int pkey_id=0;
 355         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 356         if (ameth)
 357                 {
 358                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 359                 }
 360         if (tmpeng) ENGINE_finish(tmpeng);
 361         return pkey_id;
 362         }
 363
 364 #endif
 365
 366 void ssl_load_ciphers(void)
 367         {
 368         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 369                 EVP_get_cipherbyname(SN_des_cbc);
 370         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 371                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 372         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 373                 EVP_get_cipherbyname(SN_rc4);
 374         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 375                 EVP_get_cipherbyname(SN_rc2_cbc);
 376 #ifndef OPENSSL_NO_IDEA
 377         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 378                 EVP_get_cipherbyname(SN_idea_cbc);
 379 #else
 380         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 381 #endif
 382         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 383           EVP_get_cipherbyname(SN_aes_128_cbc);
 384         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 385           EVP_get_cipherbyname(SN_aes_256_cbc);
 386         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 387           EVP_get_cipherbyname(SN_camellia_128_cbc);
 388         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 389           EVP_get_cipherbyname(SN_camellia_256_cbc);
 390         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 391           EVP_get_cipherbyname(SN_gost89_cnt);
 392         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 393           EVP_get_cipherbyname(SN_seed_cbc);
 394
 395         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
 396           EVP_get_cipherbyname(SN_aes_128_gcm);
 397         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
 398           EVP_get_cipherbyname(SN_aes_256_gcm);
 399
 400         ssl_digest_methods[SSL_MD_MD5_IDX]=
 401                 EVP_get_digestbyname(SN_md5);
 402         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 403                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 404         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
 405         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 406                 EVP_get_digestbyname(SN_sha1);
 407         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 408                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 409         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
 410         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 411                 EVP_get_digestbyname(SN_id_GostR3411_94);
 412         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 413                 {
 414                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 415                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 416                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
 417                 }
 418         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 419                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 420                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 421                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 422                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 423                 }
 424
 425         ssl_digest_methods[SSL_MD_SHA256_IDX]=
 426                 EVP_get_digestbyname(SN_sha256);
 427         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
 428                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
 429         ssl_digest_methods[SSL_MD_SHA384_IDX]=
 430                 EVP_get_digestbyname(SN_sha384);
 431         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
 432                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
 433         }
 434 #ifndef OPENSSL_NO_COMP
 435
 436 static int sk_comp_cmp(const SSL_COMP * const *a,
 437                         const SSL_COMP * const *b)
 438         {
 439         return((*a)->id-(*b)->id);
 440         }
 441
 442 static void load_builtin_compressions(void)
 443         {
 444         int got_write_lock = 0;
 445
 446         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 447         if (ssl_comp_methods == NULL)
 448                 {
 449                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 450                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 451                 got_write_lock = 1;
 452
 453                 if (ssl_comp_methods == NULL)
 454                         {
 455                         SSL_COMP *comp = NULL;
 456
 457                         MemCheck_off();
 458                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 459                         if (ssl_comp_methods != NULL)
 460                                 {
 461                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 462                                 if (comp != NULL)
 463                                         {
 464                                         comp->method=COMP_zlib();
 465                                         if (comp->method
 466                                                 && comp->method->type == NID_undef)
 467                                                 OPENSSL_free(comp);
 468                                         else
 469                                                 {
 470                                                 comp->id=SSL_COMP_ZLIB_IDX;
 471                                                 comp->name=comp->method->name;
 472                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 473                                                 }
 474                                         }
 475                                         sk_SSL_COMP_sort(ssl_comp_methods);
 476                                 }
 477                         MemCheck_on();
 478                         }
 479                 }
 480
 481         if (got_write_lock)
 482                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 483         else
 484                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 485         }
 486 #endif
 487
 488 /* ssl_cipher_get_comp sets |comp| to the correct SSL_COMP for the given
 489  * session and returns 1. On error it returns 0. */
 490 int ssl_cipher_get_comp(const SSL_SESSION *s, SSL_COMP **comp)
 491         {
 492         int i;
 493
 494         SSL_COMP ctmp;
 495 #ifndef OPENSSL_NO_COMP
 496         load_builtin_compressions();
 497 #endif
 498
 499         *comp=NULL;
 500         ctmp.id=s->compress_meth;
 501         if (ssl_comp_methods != NULL)
 502                 {
 503                 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 504                 if (i >= 0)
 505                         *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 506                 else
 507                         *comp=NULL;
 508                 }
 509
 510         return 1;
 511         }
 512
 513 /* ssl_cipher_get_evp_aead sets |*aead| to point to the correct EVP_AEAD object
 514  * for |s->cipher|. It returns 1 on success and 0 on error. */
 515 int ssl_cipher_get_evp_aead(const SSL_SESSION *s, const EVP_AEAD **aead)
 516         {
 517         const SSL_CIPHER *c = s->cipher;
 518
 519         *aead = NULL;
 520
 521         if (c == NULL)
 522                 return 0;
 523         if ((c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD) == 0)
 524                 return 0;
 525
 526         switch (c->algorithm_enc)
 527                 {
 528 #ifndef OPENSSL_NO_AES
 529         case SSL_AES128GCM:
 530                 *aead = EVP_aead_aes_128_gcm();
 531                 return 1;
 532         case SSL_AES256GCM:
 533                 *aead = EVP_aead_aes_256_gcm();
 534                 return 1;
 535 #endif
 536 #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
 537         case SSL_CHACHA20POLY1305:
 538                 *aead = EVP_aead_chacha20_poly1305();
 539                 return 1;
 540 #endif
 541                 }
 542
 543         return 0;
 544         }
 545
 546 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 547              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size)
 548         {
 549         int i;
 550         const SSL_CIPHER *c;
 551
 552         c=s->cipher;
 553         if (c == NULL) return(0);
 554
 555         /* This function doesn't deal with EVP_AEAD. See
 556          * |ssl_cipher_get_aead_evp|. */
 557         if (c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD)
 558                 return(0);
 559
 560         if ((enc == NULL) || (md == NULL)) return(0);
 561
 562         switch (c->algorithm_enc)
 563                 {
 564         case SSL_DES:
 565                 i=SSL_ENC_DES_IDX;
 566                 break;
 567         case SSL_3DES:
 568                 i=SSL_ENC_3DES_IDX;
 569                 break;
 570         case SSL_RC4:
 571                 i=SSL_ENC_RC4_IDX;
 572                 break;
 573         case SSL_RC2:
 574                 i=SSL_ENC_RC2_IDX;
 575                 break;
 576         case SSL_IDEA:
 577                 i=SSL_ENC_IDEA_IDX;
 578                 break;
 579         case SSL_eNULL:
 580                 i=SSL_ENC_NULL_IDX;
 581                 break;
 582         case SSL_AES128:
 583                 i=SSL_ENC_AES128_IDX;
 584                 break;
 585         case SSL_AES256:
 586                 i=SSL_ENC_AES256_IDX;
 587                 break;
 588         case SSL_CAMELLIA128:
 589                 i=SSL_ENC_CAMELLIA128_IDX;
 590                 break;
 591         case SSL_CAMELLIA256:
 592                 i=SSL_ENC_CAMELLIA256_IDX;
 593                 break;
 594         case SSL_eGOST2814789CNT:
 595                 i=SSL_ENC_GOST89_IDX;
 596                 break;
 597         case SSL_SEED:
 598                 i=SSL_ENC_SEED_IDX;
 599                 break;
 600         case SSL_AES128GCM:
 601                 i=SSL_ENC_AES128GCM_IDX;
 602                 break;
 603         case SSL_AES256GCM:
 604                 i=SSL_ENC_AES256GCM_IDX;
 605                 break;
 606         default:
 607                 i= -1;
 608                 break;
 609                 }
 610
 611         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 612                 *enc=NULL;
 613         else
 614                 {
 615                 if (i == SSL_ENC_NULL_IDX)
 616                         *enc=EVP_enc_null();
 617                 else
 618                         *enc=ssl_cipher_methods[i];
 619                 }
 620
 621         switch (c->algorithm_mac)
 622                 {
 623         case SSL_MD5:
 624                 i=SSL_MD_MD5_IDX;
 625                 break;
 626         case SSL_SHA1:
 627                 i=SSL_MD_SHA1_IDX;
 628                 break;
 629         case SSL_SHA256:
 630                 i=SSL_MD_SHA256_IDX;
 631                 break;
 632         case SSL_SHA384:
 633                 i=SSL_MD_SHA384_IDX;
 634                 break;
 635         case SSL_GOST94:
 636                 i = SSL_MD_GOST94_IDX;
 637                 break;
 638         case SSL_GOST89MAC:
 639                 i = SSL_MD_GOST89MAC_IDX;
 640                 break;
 641         default:
 642                 i= -1;
 643                 break;
 644                 }
 645         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 646         {
 647                 *md=NULL;
 648                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 649                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 650                 if (c->algorithm_mac == SSL_AEAD)
 651                         mac_pkey_type = NULL;
 652         }
 653         else
 654         {
 655                 *md=ssl_digest_methods[i];
 656                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 657                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 658         }
 659
 660         if ((*enc != NULL) &&
 661             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
 662             (!mac_pkey_type||*mac_pkey_type != NID_undef))
 663                 {
 664                 const EVP_CIPHER *evp;
 665
 666                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
 667                     s->ssl_version < TLS1_VERSION)
 668                         return 1;
 669
 670 #ifdef OPENSSL_FIPS
 671                 if (FIPS_mode())
 672                         return 1;
 673 #endif
 674
 675                 if      (c->algorithm_enc == SSL_RC4 &&
 676                          c->algorithm_mac == SSL_MD5 &&
 677                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
 678                         *enc = evp, *md = NULL;
 679                 else if (c->algorithm_enc == SSL_AES128 &&
 680                          c->algorithm_mac == SSL_SHA1 &&
 681                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
 682                         *enc = evp, *md = NULL;
 683                 else if (c->algorithm_enc == SSL_AES256 &&
 684                          c->algorithm_mac == SSL_SHA1 &&
 685                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
 686                         *enc = evp, *md = NULL;
 687                 return(1);
 688                 }
 689         else
 690                 return(0);
 691         }
 692
 693 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 694 {
 695         if (idx <0||idx>=SSL_MD_NUM_IDX)
 696                 {
 697                 return 0;
 698                 }
 699         *mask = ssl_handshake_digest_flag[idx];
 700         if (*mask)
 701                 *md = ssl_digest_methods[idx];
 702         else
 703                 *md = NULL;
 704         return 1;
 705 }
 706
 707 #define ITEM_SEP(a) \
 708         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 709
 710 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 711              CIPHER_ORDER **tail)
 712         {
 713         if (curr == *tail) return;
 714         if (curr == *head)
 715                 *head=curr->next;
 716         if (curr->prev != NULL)
 717                 curr->prev->next=curr->next;
 718         if (curr->next != NULL)
 719                 curr->next->prev=curr->prev;
 720         (*tail)->next=curr;
 721         curr->prev= *tail;
 722         curr->next=NULL;
 723         *tail=curr;
 724         }
 725
 726 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 727              CIPHER_ORDER **tail)
 728         {
 729         if (curr == *head) return;
 730         if (curr == *tail)
 731                 *tail=curr->prev;
 732         if (curr->next != NULL)
 733                 curr->next->prev=curr->prev;
 734         if (curr->prev != NULL)
 735                 curr->prev->next=curr->next;
 736         (*head)->prev=curr;
 737         curr->next= *head;
 738         curr->prev=NULL;
 739         *head=curr;
 740         }
 741
 742 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 743         {
 744         *mkey = 0;
 745         *auth = 0;
 746         *enc = 0;
 747         *mac = 0;
 748         *ssl = 0;
 749
 750 #ifdef OPENSSL_NO_RSA
 751         *mkey |= SSL_kRSA;
 752         *auth |= SSL_aRSA;
 753 #endif
 754 #ifdef OPENSSL_NO_DSA
 755         *auth |= SSL_aDSS;
 756 #endif
 757 #ifdef OPENSSL_NO_DH
 758         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 759         *auth |= SSL_aDH;
 760 #endif
 761 #ifdef OPENSSL_NO_KRB5
 762         *mkey |= SSL_kKRB5;
 763         *auth |= SSL_aKRB5;
 764 #endif
 765 #ifdef OPENSSL_NO_ECDSA
 766         *auth |= SSL_aECDSA;
 767 #endif
 768 #ifdef OPENSSL_NO_ECDH
 769         *mkey |= SSL_kECDHe|SSL_kECDHr;
 770         *auth |= SSL_aECDH;
 771 #endif
 772 #ifdef OPENSSL_NO_PSK
 773         *mkey |= SSL_kPSK;
 774         *auth |= SSL_aPSK;
 775 #endif
 776 #ifdef OPENSSL_NO_SRP
 777         *mkey |= SSL_kSRP;
 778 #endif
 779         /* Check for presence of GOST 34.10 algorithms, and if they
 780          * do not present, disable  appropriate auth and key exchange */
 781         if (!get_optional_pkey_id("gost94")) {
 782                 *auth |= SSL_aGOST94;
 783         }
 784         if (!get_optional_pkey_id("gost2001")) {
 785                 *auth |= SSL_aGOST01;
 786         }
 787         /* Disable GOST key exchange if no GOST signature algs are available * */
 788         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 789                 *mkey |= SSL_kGOST;
 790         }
 791 #ifdef SSL_FORBID_ENULL
 792         *enc |= SSL_eNULL;
 793 #endif
 794
 795
 796
 797         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 798         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 799         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 800         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 801         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 802         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 803         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 804         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
 805         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
 806         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 807         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 808         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 809         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 810
 811         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 812         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 813         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
 814         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
 815         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 816         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 817
 818         }
 819
 820 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 821                 int num_of_ciphers,
 822                 unsigned long disabled_mkey, unsigned long disabled_auth,
 823                 unsigned long disabled_enc, unsigned long disabled_mac,
 824                 unsigned long disabled_ssl,
 825                 CIPHER_ORDER *co_list,
 826                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 827         {
 828         int i, co_list_num;
 829         const SSL_CIPHER *c;
 830
 831         /*
 832          * We have num_of_ciphers descriptions compiled in, depending on the
 833          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 834          * These will later be sorted in a linked list with at most num
 835          * entries.
 836          */
 837
 838         /* Get the initial list of ciphers */
 839         co_list_num = 0;        /* actual count of ciphers */
 840         for (i = 0; i < num_of_ciphers; i++)
 841                 {
 842                 c = ssl_method->get_cipher(i);
 843                 /* drop those that use any of that is not available */
 844                 if ((c != NULL) && c->valid &&
 845 #ifdef OPENSSL_FIPS
 846                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
 847 #endif
 848                     !(c->algorithm_mkey & disabled_mkey) &&
 849                     !(c->algorithm_auth & disabled_auth) &&
 850                     !(c->algorithm_enc & disabled_enc) &&
 851                     !(c->algorithm_mac & disabled_mac) &&
 852                     !(c->algorithm_ssl & disabled_ssl))
 853                         {
 854                         co_list[co_list_num].cipher = c;
 855                         co_list[co_list_num].next = NULL;
 856                         co_list[co_list_num].prev = NULL;
 857                         co_list[co_list_num].active = 0;
 858                         co_list_num++;
 859 #ifdef KSSL_DEBUG
 860                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 861 #endif  /* KSSL_DEBUG */
 862                         /*
 863                         if (!sk_push(ca_list,(char *)c)) goto err;
 864                         */
 865                         }
 866                 }
 867
 868         /*
 869          * Prepare linked list from list entries
 870          */
 871         if (co_list_num > 0)
 872                 {
 873                 co_list[0].prev = NULL;
 874
 875                 if (co_list_num > 1)
 876                         {
 877                         co_list[0].next = &co_list[1];
 878
 879                         for (i = 1; i < co_list_num - 1; i++)
 880                                 {
 881                                 co_list[i].prev = &co_list[i - 1];
 882                                 co_list[i].next = &co_list[i + 1];
 883                                 }
 884
 885                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 886                         }
 887
 888                 co_list[co_list_num - 1].next = NULL;
 889
 890                 *head_p = &co_list[0];
 891                 *tail_p = &co_list[co_list_num - 1];
 892                 }
 893         }
 894
 895 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
 896                         int num_of_group_aliases,
 897                         unsigned long disabled_mkey, unsigned long disabled_auth,
 898                         unsigned long disabled_enc, unsigned long disabled_mac,
 899                         unsigned long disabled_ssl,
 900                         CIPHER_ORDER *head)
 901         {
 902         CIPHER_ORDER *ciph_curr;
 903         const SSL_CIPHER **ca_curr;
 904         int i;
 905         unsigned long mask_mkey = ~disabled_mkey;
 906         unsigned long mask_auth = ~disabled_auth;
 907         unsigned long mask_enc = ~disabled_enc;
 908         unsigned long mask_mac = ~disabled_mac;
 909         unsigned long mask_ssl = ~disabled_ssl;
 910
 911         /*
 912          * First, add the real ciphers as already collected
 913          */
 914         ciph_curr = head;
 915         ca_curr = ca_list;
 916         while (ciph_curr != NULL)
 917                 {
 918                 *ca_curr = ciph_curr->cipher;
 919                 ca_curr++;
 920                 ciph_curr = ciph_curr->next;
 921                 }
 922
 923         /*
 924          * Now we add the available ones from the cipher_aliases[] table.
 925          * They represent either one or more algorithms, some of which
 926          * in any affected category must be supported (set in enabled_mask),
 927          * or represent a cipher strength value (will be added in any case because algorithms=0).
 928          */
 929         for (i = 0; i < num_of_group_aliases; i++)
 930                 {
 931                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 932                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 933                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 934                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 935                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 936
 937                 if (algorithm_mkey)
 938                         if ((algorithm_mkey & mask_mkey) == 0)
 939                                 continue;
 940
 941                 if (algorithm_auth)
 942                         if ((algorithm_auth & mask_auth) == 0)
 943                                 continue;
 944
 945                 if (algorithm_enc)
 946                         if ((algorithm_enc & mask_enc) == 0)
 947                                 continue;
 948
 949                 if (algorithm_mac)
 950                         if ((algorithm_mac & mask_mac) == 0)
 951                                 continue;
 952
 953                 if (algorithm_ssl)
 954                         if ((algorithm_ssl & mask_ssl) == 0)
 955                                 continue;
 956
 957                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 958                 ca_curr++;
 959                 }
 960
 961         *ca_curr = NULL;        /* end of list */
 962         }
 963
 964 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 965                 unsigned long alg_mkey, unsigned long alg_auth,
 966                 unsigned long alg_enc, unsigned long alg_mac,
 967                 unsigned long alg_ssl,
 968                 unsigned long algo_strength,
 969                 int rule, int strength_bits,
 970                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 971         {
 972         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 973         const SSL_CIPHER *cp;
 974         int reverse = 0;
 975
 976 #ifdef CIPHER_DEBUG
 977         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 978                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 979 #endif
 980
 981         if (rule == CIPHER_DEL)
 982                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 983
 984         head = *head_p;
 985         tail = *tail_p;
 986
 987         if (reverse)
 988                 {
 989                 curr = tail;
 990                 last = head;
 991                 }
 992         else
 993                 {
 994                 curr = head;
 995                 last = tail;
 996                 }
 997
 998         curr2 = curr;
 999         for (;;)
1000                 {
1001                 if ((curr == NULL) || (curr == last)) break;
1002                 curr = curr2;
1003                 curr2 = reverse ? curr->prev : curr->next;
1004
1005                 cp = curr->cipher;
1006
1007                 /*
1008                  * Selection criteria is either the value of strength_bits
1009                  * or the algorithms used.
1010                  */
1011                 if (strength_bits >= 0)
1012                         {
1013                         if (strength_bits != cp->strength_bits)
1014                                 continue;
1015                         }
1016                 else
1017                         {
1018 #ifdef CIPHER_DEBUG
1019                         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);
1020 #endif
1021 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1022                         if (cipher_id && cipher_id != cp->id)
1023                                 continue;
1024 #endif
1025                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1026                                 continue;
1027                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
1028                                 continue;
1029                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
1030                                 continue;
1031                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
1032                                 continue;
1033                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1034                                 continue;
1035                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1036                                 continue;
1037                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1038                                 continue;
1039                         }
1040
1041 #ifdef CIPHER_DEBUG
1042                 printf("Action = %d\n", rule);
1043 #endif
1044
1045                 /* add the cipher if it has not been added yet. */
1046                 if (rule == CIPHER_ADD)
1047                         {
1048                         /* reverse == 0 */
1049                         if (!curr->active)
1050                                 {
1051                                 ll_append_tail(&head, curr, &tail);
1052                                 curr->active = 1;
1053                                 }
1054                         }
1055                 /* Move the added cipher to this location */
1056                 else if (rule == CIPHER_ORD)
1057                         {
1058                         /* reverse == 0 */
1059                         if (curr->active)
1060                                 {
1061                                 ll_append_tail(&head, curr, &tail);
1062                                 }
1063                         }
1064                 else if (rule == CIPHER_DEL)
1065                         {
1066                         /* reverse == 1 */
1067                         if (curr->active)
1068                                 {
1069                                 /* most recently deleted ciphersuites get best positions
1070                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1071                                  * works in reverse to maintain the order) */
1072                                 ll_append_head(&head, curr, &tail);
1073                                 curr->active = 0;
1074                                 }
1075                         }
1076                 else if (rule == CIPHER_KILL)
1077                         {
1078                         /* reverse == 0 */
1079                         if (head == curr)
1080                                 head = curr->next;
1081                         else
1082                                 curr->prev->next = curr->next;
1083                         if (tail == curr)
1084                                 tail = curr->prev;
1085                         curr->active = 0;
1086                         if (curr->next != NULL)
1087                                 curr->next->prev = curr->prev;
1088                         if (curr->prev != NULL)
1089                                 curr->prev->next = curr->next;
1090                         curr->next = NULL;
1091                         curr->prev = NULL;
1092                         }
1093                 }
1094
1095         *head_p = head;
1096         *tail_p = tail;
1097         }
1098
1099 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1100                                     CIPHER_ORDER **tail_p)
1101         {
1102         int max_strength_bits, i, *number_uses;
1103         CIPHER_ORDER *curr;
1104
1105         /*
1106          * This routine sorts the ciphers with descending strength. The sorting
1107          * must keep the pre-sorted sequence, so we apply the normal sorting
1108          * routine as '+' movement to the end of the list.
1109          */
1110         max_strength_bits = 0;
1111         curr = *head_p;
1112         while (curr != NULL)
1113                 {
1114                 if (curr->active &&
1115                     (curr->cipher->strength_bits > max_strength_bits))
1116                     max_strength_bits = curr->cipher->strength_bits;
1117                 curr = curr->next;
1118                 }
1119
1120         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1121         if (!number_uses)
1122                 {
1123                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1124                 return(0);
1125                 }
1126         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1127
1128         /*
1129          * Now find the strength_bits values actually used
1130          */
1131         curr = *head_p;
1132         while (curr != NULL)
1133                 {
1134                 if (curr->active)
1135                         number_uses[curr->cipher->strength_bits]++;
1136                 curr = curr->next;
1137                 }
1138         /*
1139          * Go through the list of used strength_bits values in descending
1140          * order.
1141          */
1142         for (i = max_strength_bits; i >= 0; i--)
1143                 if (number_uses[i] > 0)
1144                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1145
1146         OPENSSL_free(number_uses);
1147         return(1);
1148         }
1149
1150 static int ssl_cipher_process_rulestr(const char *rule_str,
1151                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1152                 const SSL_CIPHER **ca_list)
1153         {
1154         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1155         const char *l, *buf;
1156         int j, multi, found, rule, retval, ok, buflen;
1157         unsigned long cipher_id = 0;
1158         char ch;
1159
1160         retval = 1;
1161         l = rule_str;
1162         for (;;)
1163                 {
1164                 ch = *l;
1165
1166                 if (ch == '\0')
1167                         break;          /* done */
1168                 if (ch == '-')
1169                         { rule = CIPHER_DEL; l++; }
1170                 else if (ch == '+')
1171                         { rule = CIPHER_ORD; l++; }
1172                 else if (ch == '!')
1173                         { rule = CIPHER_KILL; l++; }
1174                 else if (ch == '@')
1175                         { rule = CIPHER_SPECIAL; l++; }
1176                 else
1177                         { rule = CIPHER_ADD; }
1178
1179                 if (ITEM_SEP(ch))
1180                         {
1181                         l++;
1182                         continue;
1183                         }
1184
1185                 alg_mkey = 0;
1186                 alg_auth = 0;
1187                 alg_enc = 0;
1188                 alg_mac = 0;
1189                 alg_ssl = 0;
1190                 algo_strength = 0;
1191
1192                 for (;;)
1193                         {
1194                         ch = *l;
1195                         buf = l;
1196                         buflen = 0;
1197 #ifndef CHARSET_EBCDIC
1198                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1199                                 ((ch >= '0') && (ch <= '9')) ||
1200                                 ((ch >= 'a') && (ch <= 'z')) ||
1201                                  (ch == '-') || (ch == '.'))
1202 #else
1203                         while ( isalnum(ch) || (ch == '-') || (ch == '.'))
1204 #endif
1205                                  {
1206                                  ch = *(++l);
1207                                  buflen++;
1208                                  }
1209
1210                         if (buflen == 0)
1211                                 {
1212                                 /*
1213                                  * We hit something we cannot deal with,
1214                                  * it is no command or separator nor
1215                                  * alphanumeric, so we call this an error.
1216                                  */
1217                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1218                                        SSL_R_INVALID_COMMAND);
1219                                 retval = found = 0;
1220                                 l++;
1221                                 break;
1222                                 }
1223
1224                         if (rule == CIPHER_SPECIAL)
1225                                 {
1226                                 found = 0; /* unused -- avoid compiler warning */
1227                                 break;  /* special treatment */
1228                                 }
1229
1230                         /* check for multi-part specification */
1231                         if (ch == '+')
1232                                 {
1233                                 multi=1;
1234                                 l++;
1235                                 }
1236                         else
1237                                 multi=0;
1238
1239                         /*
1240                          * Now search for the cipher alias in the ca_list. Be careful
1241                          * with the strncmp, because the "buflen" limitation
1242                          * will make the rule "ADH:SOME" and the cipher
1243                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1244                          * So additionally check whether the cipher name found
1245                          * has the correct length. We can save a strlen() call:
1246                          * just checking for the '\0' at the right place is
1247                          * sufficient, we have to strncmp() anyway. (We cannot
1248                          * use strcmp(), because buf is not '\0' terminated.)
1249                          */
1250                         j = found = 0;
1251                         cipher_id = 0;
1252                         while (ca_list[j])
1253                                 {
1254                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1255                                     (ca_list[j]->name[buflen] == '\0'))
1256                                         {
1257                                         found = 1;
1258                                         break;
1259                                         }
1260                                 else
1261                                         j++;
1262                                 }
1263
1264                         if (!found)
1265                                 break;  /* ignore this entry */
1266
1267                         if (ca_list[j]->algorithm_mkey)
1268                                 {
1269                                 if (alg_mkey)
1270                                         {
1271                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1272                                         if (!alg_mkey) { found = 0; break; }
1273                                         }
1274                                 else
1275                                         alg_mkey = ca_list[j]->algorithm_mkey;
1276                                 }
1277
1278                         if (ca_list[j]->algorithm_auth)
1279                                 {
1280                                 if (alg_auth)
1281                                         {
1282                                         alg_auth &= ca_list[j]->algorithm_auth;
1283                                         if (!alg_auth) { found = 0; break; }
1284                                         }
1285                                 else
1286                                         alg_auth = ca_list[j]->algorithm_auth;
1287                                 }
1288
1289                         if (ca_list[j]->algorithm_enc)
1290                                 {
1291                                 if (alg_enc)
1292                                         {
1293                                         alg_enc &= ca_list[j]->algorithm_enc;
1294                                         if (!alg_enc) { found = 0; break; }
1295                                         }
1296                                 else
1297                                         alg_enc = ca_list[j]->algorithm_enc;
1298                                 }
1299
1300                         if (ca_list[j]->algorithm_mac)
1301                                 {
1302                                 if (alg_mac)
1303                                         {
1304                                         alg_mac &= ca_list[j]->algorithm_mac;
1305                                         if (!alg_mac) { found = 0; break; }
1306                                         }
1307                                 else
1308                                         alg_mac = ca_list[j]->algorithm_mac;
1309                                 }
1310
1311                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1312                                 {
1313                                 if (algo_strength & SSL_EXP_MASK)
1314                                         {
1315                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1316                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1317                                         }
1318                                 else
1319                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1320                                 }
1321
1322                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1323                                 {
1324                                 if (algo_strength & SSL_STRONG_MASK)
1325                                         {
1326                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1327                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1328                                         }
1329                                 else
1330                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1331                                 }
1332
1333                         if (ca_list[j]->valid)
1334                                 {
1335                                 /* explicit ciphersuite found; its protocol version
1336                                  * does not become part of the search pattern!*/
1337
1338                                 cipher_id = ca_list[j]->id;
1339                                 }
1340                         else
1341                                 {
1342                                 /* not an explicit ciphersuite; only in this case, the
1343                                  * protocol version is considered part of the search pattern */
1344
1345                                 if (ca_list[j]->algorithm_ssl)
1346                                         {
1347                                         if (alg_ssl)
1348                                                 {
1349                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1350                                                 if (!alg_ssl) { found = 0; break; }
1351                                                 }
1352                                         else
1353                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1354                                         }
1355                                 }
1356
1357                         if (!multi) break;
1358                         }
1359
1360                 /*
1361                  * Ok, we have the rule, now apply it
1362                  */
1363                 if (rule == CIPHER_SPECIAL)
1364                         {       /* special command */
1365                         ok = 0;
1366                         if ((buflen == 8) &&
1367                                 !strncmp(buf, "STRENGTH", 8))
1368                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1369                         else
1370                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1371                                         SSL_R_INVALID_COMMAND);
1372                         if (ok == 0)
1373                                 retval = 0;
1374                         /*
1375                          * We do not support any "multi" options
1376                          * together with "@", so throw away the
1377                          * rest of the command, if any left, until
1378                          * end or ':' is found.
1379                          */
1380                         while ((*l != '\0') && !ITEM_SEP(*l))
1381                                 l++;
1382                         }
1383                 else if (found)
1384                         {
1385                         ssl_cipher_apply_rule(cipher_id,
1386                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1387                                 rule, -1, head_p, tail_p);
1388                         }
1389                 else
1390                         {
1391                         while ((*l != '\0') && !ITEM_SEP(*l))
1392                                 l++;
1393                         }
1394                 if (*l == '\0') break; /* done */
1395                 }
1396
1397         return(retval);
1398         }
1399 #ifndef OPENSSL_NO_EC
1400 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1401                                         const char **prule_str)
1402         {
1403         unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1404         if (!strcmp(*prule_str, "SUITEB128"))
1405                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1406         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1407                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1408         else if (!strcmp(*prule_str, "SUITEB128C2"))
1409                 {
1410                 suiteb_comb2 = 1;
1411                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1412                 }
1413         else if (!strcmp(*prule_str, "SUITEB192"))
1414                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1415
1416         if (suiteb_flags)
1417                 {
1418                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1419                 c->cert_flags |= suiteb_flags;
1420                 }
1421         else
1422                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1423
1424         if (!suiteb_flags)
1425                 return 1;
1426         /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1427
1428         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1429                 {
1430                 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1431                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1432                                 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1433                 else
1434                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1435                                 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1436                 return 0;
1437                 }
1438
1439         switch(suiteb_flags)
1440                 {
1441         case SSL_CERT_FLAG_SUITEB_128_LOS:
1442                 if (suiteb_comb2)
1443                         *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1444                 else
1445                         *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1446                 break;
1447         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1448                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1449                 break;
1450         case SSL_CERT_FLAG_SUITEB_192_LOS:
1451                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1452                 break;
1453                 }
1454         /* Set auto ECDH parameter determination */
1455         c->ecdh_tmp_auto = 1;
1456         return 1;
1457         }
1458 #endif
1459
1460
1461 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1462                 STACK_OF(SSL_CIPHER) **cipher_list,
1463                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1464                 const char *rule_str, CERT *c)
1465         {
1466         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1467         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1468         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1469         const char *rule_p;
1470         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1471         const SSL_CIPHER **ca_list = NULL;
1472
1473         /*
1474          * Return with error if nothing to do.
1475          */
1476         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1477                 return NULL;
1478 #ifndef OPENSSL_NO_EC
1479         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1480                 return NULL;
1481 #endif
1482
1483         /*
1484          * To reduce the work to do we only want to process the compiled
1485          * in algorithms, so we first get the mask of disabled ciphers.
1486          */
1487         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1488
1489         /*
1490          * Now we have to collect the available ciphers from the compiled
1491          * in ciphers. We cannot get more than the number compiled in, so
1492          * it is used for allocation.
1493          */
1494         num_of_ciphers = ssl_method->num_ciphers();
1495 #ifdef KSSL_DEBUG
1496         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1497 #endif    /* KSSL_DEBUG */
1498         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1499         if (co_list == NULL)
1500                 {
1501                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1502                 return(NULL);   /* Failure */
1503                 }
1504
1505         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1506                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1507                                    co_list, &head, &tail);
1508
1509
1510         /* Now arrange all ciphers by preference: */
1511
1512         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1513         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1514         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1515
1516         /* AES is our preferred symmetric cipher */
1517         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1518
1519         /* Temporarily enable everything else for sorting */
1520         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1521
1522         /* Low priority for MD5 */
1523         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1524
1525         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1526          * (For applications that allow them, they aren't too bad, but we prefer
1527          * authenticated ciphers.) */
1528         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1529
1530         /* Move ciphers without forward secrecy to the end */
1531         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1532         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1533         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1534         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1535         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1536
1537         /* RC4 is sort-of broken -- move the the end */
1538         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1539
1540         /* Now sort by symmetric encryption strength.  The above ordering remains
1541          * in force within each class */
1542         if (!ssl_cipher_strength_sort(&head, &tail))
1543                 {
1544                 OPENSSL_free(co_list);
1545                 return NULL;
1546                 }
1547
1548         /* Now disable everything (maintaining the ordering!) */
1549         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1550
1551
1552         /*
1553          * We also need cipher aliases for selecting based on the rule_str.
1554          * There might be two types of entries in the rule_str: 1) names
1555          * of ciphers themselves 2) aliases for groups of ciphers.
1556          * For 1) we need the available ciphers and for 2) the cipher
1557          * groups of cipher_aliases added together in one list (otherwise
1558          * we would be happy with just the cipher_aliases table).
1559          */
1560         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1561         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1562         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1563         if (ca_list == NULL)
1564                 {
1565                 OPENSSL_free(co_list);
1566                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1567                 return(NULL);   /* Failure */
1568                 }
1569         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1570                                    disabled_mkey, disabled_auth, disabled_enc,
1571                                    disabled_mac, disabled_ssl, head);
1572
1573         /*
1574          * If the rule_string begins with DEFAULT, apply the default rule
1575          * before using the (possibly available) additional rules.
1576          */
1577         ok = 1;
1578         rule_p = rule_str;
1579         if (strncmp(rule_str,"DEFAULT",7) == 0)
1580                 {
1581                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1582                         &head, &tail, ca_list);
1583                 rule_p += 7;
1584                 if (*rule_p == ':')
1585                         rule_p++;
1586                 }
1587
1588         if (ok && (strlen(rule_p) > 0))
1589                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1590
1591         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1592
1593         if (!ok)
1594                 {       /* Rule processing failure */
1595                 OPENSSL_free(co_list);
1596                 return(NULL);
1597                 }
1598
1599         /*
1600          * Allocate new "cipherstack" for the result, return with error
1601          * if we cannot get one.
1602          */
1603         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1604                 {
1605                 OPENSSL_free(co_list);
1606                 return(NULL);
1607                 }
1608
1609         /*
1610          * The cipher selection for the list is done. The ciphers are added
1611          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1612          */
1613         for (curr = head; curr != NULL; curr = curr->next)
1614                 {
1615 #ifdef OPENSSL_FIPS
1616                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1617 #else
1618                 if (curr->active)
1619 #endif
1620                         {
1621                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1622 #ifdef CIPHER_DEBUG
1623                         printf("<%s>\n",curr->cipher->name);
1624 #endif
1625                         }
1626                 }
1627         OPENSSL_free(co_list);  /* Not needed any longer */
1628
1629         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1630         if (tmp_cipher_list == NULL)
1631                 {
1632                 sk_SSL_CIPHER_free(cipherstack);
1633                 return NULL;
1634                 }
1635         if (*cipher_list != NULL)
1636                 sk_SSL_CIPHER_free(*cipher_list);
1637         *cipher_list = cipherstack;
1638         if (*cipher_list_by_id != NULL)
1639                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1640         *cipher_list_by_id = tmp_cipher_list;
1641         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1642
1643         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1644         return(cipherstack);
1645         }
1646
1647 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1648         {
1649         int is_export,pkl,kl;
1650         const char *ver,*exp_str;
1651         const char *kx,*au,*enc,*mac;
1652         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1653 #ifdef KSSL_DEBUG
1654         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1655 #else
1656         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1657 #endif /* KSSL_DEBUG */
1658
1659         alg_mkey = cipher->algorithm_mkey;
1660         alg_auth = cipher->algorithm_auth;
1661         alg_enc = cipher->algorithm_enc;
1662         alg_mac = cipher->algorithm_mac;
1663         alg_ssl = cipher->algorithm_ssl;
1664
1665         alg2=cipher->algorithm2;
1666
1667         is_export=SSL_C_IS_EXPORT(cipher);
1668         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1669         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1670         exp_str=is_export?" export":"";
1671
1672         if (alg_ssl & SSL_SSLV2)
1673                 ver="SSLv2";
1674         else if (alg_ssl & SSL_SSLV3)
1675                 ver="SSLv3";
1676         else if (alg_ssl & SSL_TLSV1_2)
1677                 ver="TLSv1.2";
1678         else
1679                 ver="unknown";
1680
1681         switch (alg_mkey)
1682                 {
1683         case SSL_kRSA:
1684                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1685                 break;
1686         case SSL_kDHr:
1687                 kx="DH/RSA";
1688                 break;
1689         case SSL_kDHd:
1690                 kx="DH/DSS";
1691                 break;
1692         case SSL_kKRB5:
1693                 kx="KRB5";
1694                 break;
1695         case SSL_kEDH:
1696                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1697                 break;
1698         case SSL_kECDHr:
1699                 kx="ECDH/RSA";
1700                 break;
1701         case SSL_kECDHe:
1702                 kx="ECDH/ECDSA";
1703                 break;
1704         case SSL_kEECDH:
1705                 kx="ECDH";
1706                 break;
1707         case SSL_kPSK:
1708                 kx="PSK";
1709                 break;
1710         case SSL_kSRP:
1711                 kx="SRP";
1712                 break;
1713         default:
1714                 kx="unknown";
1715                 }
1716
1717         switch (alg_auth)
1718                 {
1719         case SSL_aRSA:
1720                 au="RSA";
1721                 break;
1722         case SSL_aDSS:
1723                 au="DSS";
1724                 break;
1725         case SSL_aDH:
1726                 au="DH";
1727                 break;
1728         case SSL_aKRB5:
1729                 au="KRB5";
1730                 break;
1731         case SSL_aECDH:
1732                 au="ECDH";
1733                 break;
1734         case SSL_aNULL:
1735                 au="None";
1736                 break;
1737         case SSL_aECDSA:
1738                 au="ECDSA";
1739                 break;
1740         case SSL_aPSK:
1741                 au="PSK";
1742                 break;
1743         default:
1744                 au="unknown";
1745                 break;
1746                 }
1747
1748         switch (alg_enc)
1749                 {
1750         case SSL_DES:
1751                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1752                 break;
1753         case SSL_3DES:
1754                 enc="3DES(168)";
1755                 break;
1756         case SSL_RC4:
1757                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1758                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1759                 break;
1760         case SSL_RC2:
1761                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1762                 break;
1763         case SSL_IDEA:
1764                 enc="IDEA(128)";
1765                 break;
1766         case SSL_eNULL:
1767                 enc="None";
1768                 break;
1769         case SSL_AES128:
1770                 enc="AES(128)";
1771                 break;
1772         case SSL_AES256:
1773                 enc="AES(256)";
1774                 break;
1775         case SSL_AES128GCM:
1776                 enc="AESGCM(128)";
1777                 break;
1778         case SSL_AES256GCM:
1779                 enc="AESGCM(256)";
1780                 break;
1781         case SSL_CAMELLIA128:
1782                 enc="Camellia(128)";
1783                 break;
1784         case SSL_CAMELLIA256:
1785                 enc="Camellia(256)";
1786                 break;
1787         case SSL_SEED:
1788                 enc="SEED(128)";
1789                 break;
1790         case SSL_CHACHA20POLY1305:
1791                 enc="ChaCha20-Poly1305";
1792                 break;
1793         default:
1794                 enc="unknown";
1795                 break;
1796                 }
1797
1798         switch (alg_mac)
1799                 {
1800         case SSL_MD5:
1801                 mac="MD5";
1802                 break;
1803         case SSL_SHA1:
1804                 mac="SHA1";
1805                 break;
1806         case SSL_SHA256:
1807                 mac="SHA256";
1808                 break;
1809         case SSL_SHA384:
1810                 mac="SHA384";
1811                 break;
1812         case SSL_AEAD:
1813                 mac="AEAD";
1814                 break;
1815         default:
1816                 mac="unknown";
1817                 break;
1818                 }
1819
1820         if (buf == NULL)
1821                 {
1822                 len=128;
1823                 buf=OPENSSL_malloc(len);
1824                 if (buf == NULL) return("OPENSSL_malloc Error");
1825                 }
1826         else if (len < 128)
1827                 return("Buffer too small");
1828
1829 #ifdef KSSL_DEBUG
1830         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1831 #else
1832         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1833 #endif /* KSSL_DEBUG */
1834         return(buf);
1835         }
1836
1837 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1838         {
1839         int i;
1840
1841         if (c == NULL) return("(NONE)");
1842         i=(int)(c->id>>24L);
1843         if (i == 3)
1844                 return("TLSv1/SSLv3");
1845         else if (i == 2)
1846                 return("SSLv2");
1847         else
1848                 return("unknown");
1849         }
1850
1851 /* return the actual cipher being used */
1852 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1853         {
1854         if (c != NULL)
1855                 return(c->name);
1856         return("(NONE)");
1857         }
1858
1859 /* number of bits for symmetric cipher */
1860 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1861         {
1862         int ret=0;
1863
1864         if (c != NULL)
1865                 {
1866                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1867                 ret = c->strength_bits;
1868                 }
1869         return(ret);
1870         }
1871
1872 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1873         {
1874         return c->id;
1875         }
1876
1877 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1878         {
1879         SSL_COMP *ctmp;
1880         int i,nn;
1881
1882         if ((n == 0) || (sk == NULL)) return(NULL);
1883         nn=sk_SSL_COMP_num(sk);
1884         for (i=0; i<nn; i++)
1885                 {
1886                 ctmp=sk_SSL_COMP_value(sk,i);
1887                 if (ctmp->id == n)
1888                         return(ctmp);
1889                 }
1890         return(NULL);
1891         }
1892
1893 #ifdef OPENSSL_NO_COMP
1894 void *SSL_COMP_get_compression_methods(void)
1895         {
1896         return NULL;
1897         }
1898 int SSL_COMP_add_compression_method(int id, void *cm)
1899         {
1900         return 1;
1901         }
1902
1903 const char *SSL_COMP_get_name(const void *comp)
1904         {
1905         return NULL;
1906         }
1907 #else
1908 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1909         {
1910         load_builtin_compressions();
1911         return(ssl_comp_methods);
1912         }
1913
1914 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1915         {
1916         SSL_COMP *comp;
1917
1918         if (cm == NULL || cm->type == NID_undef)
1919                 return 1;
1920
1921         /* According to draft-ietf-tls-compression-04.txt, the
1922            compression number ranges should be the following:
1923
1924            0 to 63:    methods defined by the IETF
1925            64 to 192:  external party methods assigned by IANA
1926            193 to 255: reserved for private use */
1927         if (id < 193 || id > 255)
1928                 {
1929                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1930                 return 0;
1931                 }
1932
1933         MemCheck_off();
1934         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1935         comp->id=id;
1936         comp->method=cm;
1937         load_builtin_compressions();
1938         if (ssl_comp_methods
1939                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1940                 {
1941                 OPENSSL_free(comp);
1942                 MemCheck_on();
1943                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1944                 return(1);
1945                 }
1946         else if ((ssl_comp_methods == NULL)
1947                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1948                 {
1949                 OPENSSL_free(comp);
1950                 MemCheck_on();
1951                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1952                 return(1);
1953                 }
1954         else
1955                 {
1956                 MemCheck_on();
1957                 return(0);
1958                 }
1959         }
1960
1961 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1962         {
1963         if (comp)
1964                 return comp->name;
1965         return NULL;
1966         }
1967 #endif
1968 /* For a cipher return the index corresponding to the certificate type */
1969 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1970         {
1971         unsigned long alg_k, alg_a;
1972
1973         alg_k = c->algorithm_mkey;
1974         alg_a = c->algorithm_auth;
1975
1976         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1977                 {
1978                 /* we don't need to look at SSL_kEECDH
1979                  * since no certificate is needed for
1980                  * anon ECDH and for authenticated
1981                  * EECDH, the check for the auth
1982                  * algorithm will set i correctly
1983                  * NOTE: For ECDH-RSA, we need an ECC
1984                  * not an RSA cert but for EECDH-RSA
1985                  * we need an RSA cert. Placing the
1986                  * checks for SSL_kECDH before RSA
1987                  * checks ensures the correct cert is chosen.
1988                  */
1989                 return SSL_PKEY_ECC;
1990                 }
1991         else if (alg_a & SSL_aECDSA)
1992                 return SSL_PKEY_ECC;
1993         else if (alg_k & SSL_kDHr)
1994                 return SSL_PKEY_DH_RSA;
1995         else if (alg_k & SSL_kDHd)
1996                 return SSL_PKEY_DH_DSA;
1997         else if (alg_a & SSL_aDSS)
1998                 return SSL_PKEY_DSA_SIGN;
1999         else if (alg_a & SSL_aRSA)
2000                 return SSL_PKEY_RSA_ENC;
2001         else if (alg_a & SSL_aKRB5)
2002                 /* VRS something else here? */
2003                 return -1;
2004         else if (alg_a & SSL_aGOST94)
2005                 return SSL_PKEY_GOST94;
2006         else if (alg_a & SSL_aGOST01)
2007                 return SSL_PKEY_GOST01;
2008         return -1;
2009         }
2010
2011 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2012         {
2013         const SSL_CIPHER *c;
2014         c = ssl->method->get_cipher_by_char(ptr);
2015         if (c == NULL || c->valid == 0)
2016                 return NULL;
2017         return c;
2018         }
2019
2020 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2021         {
2022         return ssl->method->get_cipher_by_char(ptr);
2023         }