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_kDHE,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 246         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 247
 248         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 249
 250         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 251         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 252         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 253         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 254         {0,SSL_TXT_kECDHE,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 255         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 256
 257         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 258         {0,SSL_TXT_kSRP,0,    SSL_kSRP,  0,0,0,0,0,0,0,0},
 259         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
 260
 261         /* server authentication aliases */
 262         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 263         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 264         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 265         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 266         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 267         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 268         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 269         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 270         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 271         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 272         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
 273         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
 274         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
 275         {0,SSL_TXT_aSRP,0,    0,SSL_aSRP,  0,0,0,0,0,0,0},
 276
 277         /* aliases combining key exchange and server authentication */
 278         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 279         {0,SSL_TXT_DHE,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 280         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 281         {0,SSL_TXT_ECDHE,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 282         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 283         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 284         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 285         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 286         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 287         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 288         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
 289
 290
 291         /* symmetric encryption aliases */
 292         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 293         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 294         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 295         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 296         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 297         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 298         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 299         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
 300         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
 301         {0,SSL_TXT_AES,0,     0,0,SSL_AES,0,0,0,0,0,0},
 302         {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
 303         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 304         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 305         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 306
 307         /* MAC aliases */
 308         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 309         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 310         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 311         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 312         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 313         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
 314         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
 315
 316         /* protocol version aliases */
 317         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 318         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 319         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 320         {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
 321
 322         /* export flag */
 323         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 324         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 325
 326         /* strength classes */
 327         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 328         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 329         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 330         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 331         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 332         /* FIPS 140-2 approved ciphersuite */
 333         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
 334        /* "DHE-" aliases to "EDH-" labels (for forward compatibility) */
 335         {0,SSL3_TXT_DHE_DSS_DES_40_CBC_SHA,0,
 336          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
 337         {0,SSL3_TXT_DHE_DSS_DES_64_CBC_SHA,0,
 338          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
 339         {0,SSL3_TXT_DHE_DSS_DES_192_CBC3_SHA,0,
 340          SSL_kDHE,SSL_aDSS,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
 341         {0,SSL3_TXT_DHE_RSA_DES_40_CBC_SHA,0,
 342          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
 343         {0,SSL3_TXT_DHE_RSA_DES_64_CBC_SHA,0,
 344          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
 345         {0,SSL3_TXT_DHE_RSA_DES_192_CBC3_SHA,0,
 346          SSL_kDHE,SSL_aRSA,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
 347         };
 348 /* Search for public key algorithm with given name and
 349  * return its pkey_id if it is available. Otherwise return 0
 350  */
 351 #ifdef OPENSSL_NO_ENGINE
 352
 353 static int get_optional_pkey_id(const char *pkey_name)
 354         {
 355         const EVP_PKEY_ASN1_METHOD *ameth;
 356         int pkey_id=0;
 357         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
 358         if (ameth)
 359                 {
 360                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 361                 }
 362         return pkey_id;
 363         }
 364
 365 #else
 366
 367 static int get_optional_pkey_id(const char *pkey_name)
 368         {
 369         const EVP_PKEY_ASN1_METHOD *ameth;
 370         ENGINE *tmpeng = NULL;
 371         int pkey_id=0;
 372         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 373         if (ameth)
 374                 {
 375                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 376                 }
 377         if (tmpeng) ENGINE_finish(tmpeng);
 378         return pkey_id;
 379         }
 380
 381 #endif
 382
 383 void ssl_load_ciphers(void)
 384         {
 385         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 386                 EVP_get_cipherbyname(SN_des_cbc);
 387         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 388                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 389         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 390                 EVP_get_cipherbyname(SN_rc4);
 391         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 392                 EVP_get_cipherbyname(SN_rc2_cbc);
 393 #ifndef OPENSSL_NO_IDEA
 394         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 395                 EVP_get_cipherbyname(SN_idea_cbc);
 396 #else
 397         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 398 #endif
 399         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 400           EVP_get_cipherbyname(SN_aes_128_cbc);
 401         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 402           EVP_get_cipherbyname(SN_aes_256_cbc);
 403         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 404           EVP_get_cipherbyname(SN_camellia_128_cbc);
 405         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 406           EVP_get_cipherbyname(SN_camellia_256_cbc);
 407         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 408           EVP_get_cipherbyname(SN_gost89_cnt);
 409         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 410           EVP_get_cipherbyname(SN_seed_cbc);
 411
 412         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
 413           EVP_get_cipherbyname(SN_aes_128_gcm);
 414         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
 415           EVP_get_cipherbyname(SN_aes_256_gcm);
 416
 417         ssl_digest_methods[SSL_MD_MD5_IDX]=
 418                 EVP_get_digestbyname(SN_md5);
 419         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 420                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 421         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
 422         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 423                 EVP_get_digestbyname(SN_sha1);
 424         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 425                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 426         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
 427         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 428                 EVP_get_digestbyname(SN_id_GostR3411_94);
 429         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 430                 {
 431                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 432                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 433                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
 434                 }
 435         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 436                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 437                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 438                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 439                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 440                 }
 441
 442         ssl_digest_methods[SSL_MD_SHA256_IDX]=
 443                 EVP_get_digestbyname(SN_sha256);
 444         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
 445                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
 446         ssl_digest_methods[SSL_MD_SHA384_IDX]=
 447                 EVP_get_digestbyname(SN_sha384);
 448         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
 449                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
 450         }
 451 #ifndef OPENSSL_NO_COMP
 452
 453 static int sk_comp_cmp(const SSL_COMP * const *a,
 454                         const SSL_COMP * const *b)
 455         {
 456         return((*a)->id-(*b)->id);
 457         }
 458
 459 static void load_builtin_compressions(void)
 460         {
 461         int got_write_lock = 0;
 462
 463         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 464         if (ssl_comp_methods == NULL)
 465                 {
 466                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 467                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 468                 got_write_lock = 1;
 469
 470                 if (ssl_comp_methods == NULL)
 471                         {
 472                         SSL_COMP *comp = NULL;
 473
 474                         MemCheck_off();
 475                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 476                         if (ssl_comp_methods != NULL)
 477                                 {
 478                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 479                                 if (comp != NULL)
 480                                         {
 481                                         comp->method=COMP_zlib();
 482                                         if (comp->method
 483                                                 && comp->method->type == NID_undef)
 484                                                 OPENSSL_free(comp);
 485                                         else
 486                                                 {
 487                                                 comp->id=SSL_COMP_ZLIB_IDX;
 488                                                 comp->name=comp->method->name;
 489                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 490                                                 }
 491                                         }
 492                                         sk_SSL_COMP_sort(ssl_comp_methods);
 493                                 }
 494                         MemCheck_on();
 495                         }
 496                 }
 497
 498         if (got_write_lock)
 499                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 500         else
 501                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 502         }
 503 #endif
 504
 505 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 506              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 507         {
 508         int i;
 509         const SSL_CIPHER *c;
 510
 511         c=s->cipher;
 512         if (c == NULL) return(0);
 513         if (comp != NULL)
 514                 {
 515                 SSL_COMP ctmp;
 516 #ifndef OPENSSL_NO_COMP
 517                 load_builtin_compressions();
 518 #endif
 519
 520                 *comp=NULL;
 521                 ctmp.id=s->compress_meth;
 522                 if (ssl_comp_methods != NULL)
 523                         {
 524                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 525                         if (i >= 0)
 526                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 527                         else
 528                                 *comp=NULL;
 529                         }
 530                 }
 531
 532         if ((enc == NULL) || (md == NULL)) return(0);
 533
 534         switch (c->algorithm_enc)
 535                 {
 536         case SSL_DES:
 537                 i=SSL_ENC_DES_IDX;
 538                 break;
 539         case SSL_3DES:
 540                 i=SSL_ENC_3DES_IDX;
 541                 break;
 542         case SSL_RC4:
 543                 i=SSL_ENC_RC4_IDX;
 544                 break;
 545         case SSL_RC2:
 546                 i=SSL_ENC_RC2_IDX;
 547                 break;
 548         case SSL_IDEA:
 549                 i=SSL_ENC_IDEA_IDX;
 550                 break;
 551         case SSL_eNULL:
 552                 i=SSL_ENC_NULL_IDX;
 553                 break;
 554         case SSL_AES128:
 555                 i=SSL_ENC_AES128_IDX;
 556                 break;
 557         case SSL_AES256:
 558                 i=SSL_ENC_AES256_IDX;
 559                 break;
 560         case SSL_CAMELLIA128:
 561                 i=SSL_ENC_CAMELLIA128_IDX;
 562                 break;
 563         case SSL_CAMELLIA256:
 564                 i=SSL_ENC_CAMELLIA256_IDX;
 565                 break;
 566         case SSL_eGOST2814789CNT:
 567                 i=SSL_ENC_GOST89_IDX;
 568                 break;
 569         case SSL_SEED:
 570                 i=SSL_ENC_SEED_IDX;
 571                 break;
 572         case SSL_AES128GCM:
 573                 i=SSL_ENC_AES128GCM_IDX;
 574                 break;
 575         case SSL_AES256GCM:
 576                 i=SSL_ENC_AES256GCM_IDX;
 577                 break;
 578         default:
 579                 i= -1;
 580                 break;
 581                 }
 582
 583         if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
 584                 *enc=NULL;
 585         else
 586                 {
 587                 if (i == SSL_ENC_NULL_IDX)
 588                         *enc=EVP_enc_null();
 589                 else
 590                         *enc=ssl_cipher_methods[i];
 591                 }
 592
 593         switch (c->algorithm_mac)
 594                 {
 595         case SSL_MD5:
 596                 i=SSL_MD_MD5_IDX;
 597                 break;
 598         case SSL_SHA1:
 599                 i=SSL_MD_SHA1_IDX;
 600                 break;
 601         case SSL_SHA256:
 602                 i=SSL_MD_SHA256_IDX;
 603                 break;
 604         case SSL_SHA384:
 605                 i=SSL_MD_SHA384_IDX;
 606                 break;
 607         case SSL_GOST94:
 608                 i = SSL_MD_GOST94_IDX;
 609                 break;
 610         case SSL_GOST89MAC:
 611                 i = SSL_MD_GOST89MAC_IDX;
 612                 break;
 613         default:
 614                 i= -1;
 615                 break;
 616                 }
 617         if ((i < 0) || (i >= SSL_MD_NUM_IDX))
 618         {
 619                 *md=NULL;
 620                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 621                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 622                 if (c->algorithm_mac == SSL_AEAD)
 623                         mac_pkey_type = NULL;
 624         }
 625         else
 626         {
 627                 *md=ssl_digest_methods[i];
 628                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 629                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 630         }
 631
 632         if ((*enc != NULL) &&
 633             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
 634             (!mac_pkey_type||*mac_pkey_type != NID_undef))
 635                 {
 636                 const EVP_CIPHER *evp;
 637
 638                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
 639                     s->ssl_version < TLS1_VERSION)
 640                         return 1;
 641
 642 #ifdef OPENSSL_FIPS
 643                 if (FIPS_mode())
 644                         return 1;
 645 #endif
 646
 647                 if      (c->algorithm_enc == SSL_RC4 &&
 648                          c->algorithm_mac == SSL_MD5 &&
 649                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
 650                         *enc = evp, *md = NULL;
 651                 else if (c->algorithm_enc == SSL_AES128 &&
 652                          c->algorithm_mac == SSL_SHA1 &&
 653                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
 654                         *enc = evp, *md = NULL;
 655                 else if (c->algorithm_enc == SSL_AES256 &&
 656                          c->algorithm_mac == SSL_SHA1 &&
 657                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
 658                         *enc = evp, *md = NULL;
 659                 else if (c->algorithm_enc == SSL_AES128 &&
 660                          c->algorithm_mac == SSL_SHA256 &&
 661                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
 662                         *enc = evp, *md = NULL;
 663                 else if (c->algorithm_enc == SSL_AES256 &&
 664                          c->algorithm_mac == SSL_SHA256 &&
 665                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
 666                         *enc = evp, *md = NULL;
 667                 return(1);
 668                 }
 669         else
 670                 return(0);
 671         }
 672
 673 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 674 {
 675         if (idx <0||idx>=SSL_MD_NUM_IDX)
 676                 {
 677                 return 0;
 678                 }
 679         *mask = ssl_handshake_digest_flag[idx];
 680         if (*mask)
 681                 *md = ssl_digest_methods[idx];
 682         else
 683                 *md = NULL;
 684         return 1;
 685 }
 686
 687 #define ITEM_SEP(a) \
 688         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 689
 690 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 691              CIPHER_ORDER **tail)
 692         {
 693         if (curr == *tail) return;
 694         if (curr == *head)
 695                 *head=curr->next;
 696         if (curr->prev != NULL)
 697                 curr->prev->next=curr->next;
 698         if (curr->next != NULL)
 699                 curr->next->prev=curr->prev;
 700         (*tail)->next=curr;
 701         curr->prev= *tail;
 702         curr->next=NULL;
 703         *tail=curr;
 704         }
 705
 706 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 707              CIPHER_ORDER **tail)
 708         {
 709         if (curr == *head) return;
 710         if (curr == *tail)
 711                 *tail=curr->prev;
 712         if (curr->next != NULL)
 713                 curr->next->prev=curr->prev;
 714         if (curr->prev != NULL)
 715                 curr->prev->next=curr->next;
 716         (*head)->prev=curr;
 717         curr->next= *head;
 718         curr->prev=NULL;
 719         *head=curr;
 720         }
 721
 722 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 723         {
 724         *mkey = 0;
 725         *auth = 0;
 726         *enc = 0;
 727         *mac = 0;
 728         *ssl = 0;
 729
 730 #ifdef OPENSSL_NO_RSA
 731         *mkey |= SSL_kRSA;
 732         *auth |= SSL_aRSA;
 733 #endif
 734 #ifdef OPENSSL_NO_DSA
 735         *auth |= SSL_aDSS;
 736 #endif
 737 #ifdef OPENSSL_NO_DH
 738         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 739         *auth |= SSL_aDH;
 740 #endif
 741 #ifdef OPENSSL_NO_KRB5
 742         *mkey |= SSL_kKRB5;
 743         *auth |= SSL_aKRB5;
 744 #endif
 745 #ifdef OPENSSL_NO_ECDSA
 746         *auth |= SSL_aECDSA;
 747 #endif
 748 #ifdef OPENSSL_NO_ECDH
 749         *mkey |= SSL_kECDHe|SSL_kECDHr;
 750         *auth |= SSL_aECDH;
 751 #endif
 752 #ifdef OPENSSL_NO_PSK
 753         *mkey |= SSL_kPSK;
 754         *auth |= SSL_aPSK;
 755 #endif
 756 #ifdef OPENSSL_NO_SRP
 757         *mkey |= SSL_kSRP;
 758 #endif
 759         /* Check for presence of GOST 34.10 algorithms, and if they
 760          * do not present, disable  appropriate auth and key exchange */
 761         if (!get_optional_pkey_id("gost94")) {
 762                 *auth |= SSL_aGOST94;
 763         }
 764         if (!get_optional_pkey_id("gost2001")) {
 765                 *auth |= SSL_aGOST01;
 766         }
 767         /* Disable GOST key exchange if no GOST signature algs are available * */
 768         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 769                 *mkey |= SSL_kGOST;
 770         }
 771 #ifdef SSL_FORBID_ENULL
 772         *enc |= SSL_eNULL;
 773 #endif
 774
 775
 776
 777         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 778         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 779         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 780         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 781         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 782         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 783         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 784         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
 785         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
 786         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 787         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 788         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 789         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 790
 791         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 792         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 793         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
 794         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
 795         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 796         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 797
 798         }
 799
 800 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 801                 int num_of_ciphers,
 802                 unsigned long disabled_mkey, unsigned long disabled_auth,
 803                 unsigned long disabled_enc, unsigned long disabled_mac,
 804                 unsigned long disabled_ssl,
 805                 CIPHER_ORDER *co_list,
 806                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 807         {
 808         int i, co_list_num;
 809         const SSL_CIPHER *c;
 810
 811         /*
 812          * We have num_of_ciphers descriptions compiled in, depending on the
 813          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 814          * These will later be sorted in a linked list with at most num
 815          * entries.
 816          */
 817
 818         /* Get the initial list of ciphers */
 819         co_list_num = 0;        /* actual count of ciphers */
 820         for (i = 0; i < num_of_ciphers; i++)
 821                 {
 822                 c = ssl_method->get_cipher(i);
 823                 /* drop those that use any of that is not available */
 824                 if ((c != NULL) && c->valid &&
 825 #ifdef OPENSSL_FIPS
 826                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
 827 #endif
 828                     !(c->algorithm_mkey & disabled_mkey) &&
 829                     !(c->algorithm_auth & disabled_auth) &&
 830                     !(c->algorithm_enc & disabled_enc) &&
 831                     !(c->algorithm_mac & disabled_mac) &&
 832                     !(c->algorithm_ssl & disabled_ssl))
 833                         {
 834                         co_list[co_list_num].cipher = c;
 835                         co_list[co_list_num].next = NULL;
 836                         co_list[co_list_num].prev = NULL;
 837                         co_list[co_list_num].active = 0;
 838                         co_list_num++;
 839 #ifdef KSSL_DEBUG
 840                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 841 #endif  /* KSSL_DEBUG */
 842                         /*
 843                         if (!sk_push(ca_list,(char *)c)) goto err;
 844                         */
 845                         }
 846                 }
 847
 848         /*
 849          * Prepare linked list from list entries
 850          */
 851         if (co_list_num > 0)
 852                 {
 853                 co_list[0].prev = NULL;
 854
 855                 if (co_list_num > 1)
 856                         {
 857                         co_list[0].next = &co_list[1];
 858
 859                         for (i = 1; i < co_list_num - 1; i++)
 860                                 {
 861                                 co_list[i].prev = &co_list[i - 1];
 862                                 co_list[i].next = &co_list[i + 1];
 863                                 }
 864
 865                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 866                         }
 867
 868                 co_list[co_list_num - 1].next = NULL;
 869
 870                 *head_p = &co_list[0];
 871                 *tail_p = &co_list[co_list_num - 1];
 872                 }
 873         }
 874
 875 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
 876                         int num_of_group_aliases,
 877                         unsigned long disabled_mkey, unsigned long disabled_auth,
 878                         unsigned long disabled_enc, unsigned long disabled_mac,
 879                         unsigned long disabled_ssl,
 880                         CIPHER_ORDER *head)
 881         {
 882         CIPHER_ORDER *ciph_curr;
 883         const SSL_CIPHER **ca_curr;
 884         int i;
 885         unsigned long mask_mkey = ~disabled_mkey;
 886         unsigned long mask_auth = ~disabled_auth;
 887         unsigned long mask_enc = ~disabled_enc;
 888         unsigned long mask_mac = ~disabled_mac;
 889         unsigned long mask_ssl = ~disabled_ssl;
 890
 891         /*
 892          * First, add the real ciphers as already collected
 893          */
 894         ciph_curr = head;
 895         ca_curr = ca_list;
 896         while (ciph_curr != NULL)
 897                 {
 898                 *ca_curr = ciph_curr->cipher;
 899                 ca_curr++;
 900                 ciph_curr = ciph_curr->next;
 901                 }
 902
 903         /*
 904          * Now we add the available ones from the cipher_aliases[] table.
 905          * They represent either one or more algorithms, some of which
 906          * in any affected category must be supported (set in enabled_mask),
 907          * or represent a cipher strength value (will be added in any case because algorithms=0).
 908          */
 909         for (i = 0; i < num_of_group_aliases; i++)
 910                 {
 911                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 912                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 913                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 914                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 915                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 916
 917                 if (algorithm_mkey)
 918                         if ((algorithm_mkey & mask_mkey) == 0)
 919                                 continue;
 920
 921                 if (algorithm_auth)
 922                         if ((algorithm_auth & mask_auth) == 0)
 923                                 continue;
 924
 925                 if (algorithm_enc)
 926                         if ((algorithm_enc & mask_enc) == 0)
 927                                 continue;
 928
 929                 if (algorithm_mac)
 930                         if ((algorithm_mac & mask_mac) == 0)
 931                                 continue;
 932
 933                 if (algorithm_ssl)
 934                         if ((algorithm_ssl & mask_ssl) == 0)
 935                                 continue;
 936
 937                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 938                 ca_curr++;
 939                 }
 940
 941         *ca_curr = NULL;        /* end of list */
 942         }
 943
 944 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 945                 unsigned long alg_mkey, unsigned long alg_auth,
 946                 unsigned long alg_enc, unsigned long alg_mac,
 947                 unsigned long alg_ssl,
 948                 unsigned long algo_strength,
 949                 int rule, int strength_bits,
 950                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 951         {
 952         CIPHER_ORDER *head, *tail, *curr, *next, *last;
 953         const SSL_CIPHER *cp;
 954         int reverse = 0;
 955
 956 #ifdef CIPHER_DEBUG
 957         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 958                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 959 #endif
 960
 961         if (rule == CIPHER_DEL)
 962                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 963
 964         head = *head_p;
 965         tail = *tail_p;
 966
 967         if (reverse)
 968                 {
 969                 next = tail;
 970                 last = head;
 971                 }
 972         else
 973                 {
 974                 next = head;
 975                 last = tail;
 976                 }
 977
 978         curr = NULL;
 979         for (;;)
 980                 {
 981                 if (curr == last) break;
 982
 983                 curr = next;
 984
 985                 if (curr == NULL) break;
 986
 987                 next = reverse ? curr->prev : curr->next;
 988
 989                 cp = curr->cipher;
 990
 991                 /*
 992                  * Selection criteria is either the value of strength_bits
 993                  * or the algorithms used.
 994                  */
 995                 if (strength_bits >= 0)
 996                         {
 997                         if (strength_bits != cp->strength_bits)
 998                                 continue;
 999                         }
1000                 else
1001                         {
1002 #ifdef CIPHER_DEBUG
1003                         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);
1004 #endif
1005 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1006                         if (cipher_id && cipher_id != cp->id)
1007                                 continue;
1008 #endif
1009                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1010                                 continue;
1011                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
1012                                 continue;
1013                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
1014                                 continue;
1015                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
1016                                 continue;
1017                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1018                                 continue;
1019                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1020                                 continue;
1021                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1022                                 continue;
1023                         }
1024
1025 #ifdef CIPHER_DEBUG
1026                 printf("Action = %d\n", rule);
1027 #endif
1028
1029                 /* add the cipher if it has not been added yet. */
1030                 if (rule == CIPHER_ADD)
1031                         {
1032                         /* reverse == 0 */
1033                         if (!curr->active)
1034                                 {
1035                                 ll_append_tail(&head, curr, &tail);
1036                                 curr->active = 1;
1037                                 }
1038                         }
1039                 /* Move the added cipher to this location */
1040                 else if (rule == CIPHER_ORD)
1041                         {
1042                         /* reverse == 0 */
1043                         if (curr->active)
1044                                 {
1045                                 ll_append_tail(&head, curr, &tail);
1046                                 }
1047                         }
1048                 else if (rule == CIPHER_DEL)
1049                         {
1050                         /* reverse == 1 */
1051                         if (curr->active)
1052                                 {
1053                                 /* most recently deleted ciphersuites get best positions
1054                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1055                                  * works in reverse to maintain the order) */
1056                                 ll_append_head(&head, curr, &tail);
1057                                 curr->active = 0;
1058                                 }
1059                         }
1060                 else if (rule == CIPHER_KILL)
1061                         {
1062                         /* reverse == 0 */
1063                         if (head == curr)
1064                                 head = curr->next;
1065                         else
1066                                 curr->prev->next = curr->next;
1067                         if (tail == curr)
1068                                 tail = curr->prev;
1069                         curr->active = 0;
1070                         if (curr->next != NULL)
1071                                 curr->next->prev = curr->prev;
1072                         if (curr->prev != NULL)
1073                                 curr->prev->next = curr->next;
1074                         curr->next = NULL;
1075                         curr->prev = NULL;
1076                         }
1077                 }
1078
1079         *head_p = head;
1080         *tail_p = tail;
1081         }
1082
1083 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1084                                     CIPHER_ORDER **tail_p)
1085         {
1086         int max_strength_bits, i, *number_uses;
1087         CIPHER_ORDER *curr;
1088
1089         /*
1090          * This routine sorts the ciphers with descending strength. The sorting
1091          * must keep the pre-sorted sequence, so we apply the normal sorting
1092          * routine as '+' movement to the end of the list.
1093          */
1094         max_strength_bits = 0;
1095         curr = *head_p;
1096         while (curr != NULL)
1097                 {
1098                 if (curr->active &&
1099                     (curr->cipher->strength_bits > max_strength_bits))
1100                     max_strength_bits = curr->cipher->strength_bits;
1101                 curr = curr->next;
1102                 }
1103
1104         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1105         if (!number_uses)
1106                 {
1107                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1108                 return(0);
1109                 }
1110         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1111
1112         /*
1113          * Now find the strength_bits values actually used
1114          */
1115         curr = *head_p;
1116         while (curr != NULL)
1117                 {
1118                 if (curr->active)
1119                         number_uses[curr->cipher->strength_bits]++;
1120                 curr = curr->next;
1121                 }
1122         /*
1123          * Go through the list of used strength_bits values in descending
1124          * order.
1125          */
1126         for (i = max_strength_bits; i >= 0; i--)
1127                 if (number_uses[i] > 0)
1128                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1129
1130         OPENSSL_free(number_uses);
1131         return(1);
1132         }
1133
1134 static int ssl_cipher_process_rulestr(const char *rule_str,
1135                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1136                 const SSL_CIPHER **ca_list)
1137         {
1138         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1139         const char *l, *buf;
1140         int j, multi, found, rule, retval, ok, buflen;
1141         unsigned long cipher_id = 0;
1142         char ch;
1143
1144         retval = 1;
1145         l = rule_str;
1146         for (;;)
1147                 {
1148                 ch = *l;
1149
1150                 if (ch == '\0')
1151                         break;          /* done */
1152                 if (ch == '-')
1153                         { rule = CIPHER_DEL; l++; }
1154                 else if (ch == '+')
1155                         { rule = CIPHER_ORD; l++; }
1156                 else if (ch == '!')
1157                         { rule = CIPHER_KILL; l++; }
1158                 else if (ch == '@')
1159                         { rule = CIPHER_SPECIAL; l++; }
1160                 else
1161                         { rule = CIPHER_ADD; }
1162
1163                 if (ITEM_SEP(ch))
1164                         {
1165                         l++;
1166                         continue;
1167                         }
1168
1169                 alg_mkey = 0;
1170                 alg_auth = 0;
1171                 alg_enc = 0;
1172                 alg_mac = 0;
1173                 alg_ssl = 0;
1174                 algo_strength = 0;
1175
1176                 for (;;)
1177                         {
1178                         ch = *l;
1179                         buf = l;
1180                         buflen = 0;
1181 #ifndef CHARSET_EBCDIC
1182                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1183                                 ((ch >= '0') && (ch <= '9')) ||
1184                                 ((ch >= 'a') && (ch <= 'z')) ||
1185                                  (ch == '-') || (ch == '.'))
1186 #else
1187                         while ( isalnum(ch) || (ch == '-') || (ch == '.'))
1188 #endif
1189                                  {
1190                                  ch = *(++l);
1191                                  buflen++;
1192                                  }
1193
1194                         if (buflen == 0)
1195                                 {
1196                                 /*
1197                                  * We hit something we cannot deal with,
1198                                  * it is no command or separator nor
1199                                  * alphanumeric, so we call this an error.
1200                                  */
1201                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1202                                        SSL_R_INVALID_COMMAND);
1203                                 retval = found = 0;
1204                                 l++;
1205                                 break;
1206                                 }
1207
1208                         if (rule == CIPHER_SPECIAL)
1209                                 {
1210                                 found = 0; /* unused -- avoid compiler warning */
1211                                 break;  /* special treatment */
1212                                 }
1213
1214                         /* check for multi-part specification */
1215                         if (ch == '+')
1216                                 {
1217                                 multi=1;
1218                                 l++;
1219                                 }
1220                         else
1221                                 multi=0;
1222
1223                         /*
1224                          * Now search for the cipher alias in the ca_list. Be careful
1225                          * with the strncmp, because the "buflen" limitation
1226                          * will make the rule "ADH:SOME" and the cipher
1227                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1228                          * So additionally check whether the cipher name found
1229                          * has the correct length. We can save a strlen() call:
1230                          * just checking for the '\0' at the right place is
1231                          * sufficient, we have to strncmp() anyway. (We cannot
1232                          * use strcmp(), because buf is not '\0' terminated.)
1233                          */
1234                         j = found = 0;
1235                         cipher_id = 0;
1236                         while (ca_list[j])
1237                                 {
1238                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1239                                     (ca_list[j]->name[buflen] == '\0'))
1240                                         {
1241                                         found = 1;
1242                                         break;
1243                                         }
1244                                 else
1245                                         j++;
1246                                 }
1247
1248                         if (!found)
1249                                 break;  /* ignore this entry */
1250
1251                         if (ca_list[j]->algorithm_mkey)
1252                                 {
1253                                 if (alg_mkey)
1254                                         {
1255                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1256                                         if (!alg_mkey) { found = 0; break; }
1257                                         }
1258                                 else
1259                                         alg_mkey = ca_list[j]->algorithm_mkey;
1260                                 }
1261
1262                         if (ca_list[j]->algorithm_auth)
1263                                 {
1264                                 if (alg_auth)
1265                                         {
1266                                         alg_auth &= ca_list[j]->algorithm_auth;
1267                                         if (!alg_auth) { found = 0; break; }
1268                                         }
1269                                 else
1270                                         alg_auth = ca_list[j]->algorithm_auth;
1271                                 }
1272
1273                         if (ca_list[j]->algorithm_enc)
1274                                 {
1275                                 if (alg_enc)
1276                                         {
1277                                         alg_enc &= ca_list[j]->algorithm_enc;
1278                                         if (!alg_enc) { found = 0; break; }
1279                                         }
1280                                 else
1281                                         alg_enc = ca_list[j]->algorithm_enc;
1282                                 }
1283
1284                         if (ca_list[j]->algorithm_mac)
1285                                 {
1286                                 if (alg_mac)
1287                                         {
1288                                         alg_mac &= ca_list[j]->algorithm_mac;
1289                                         if (!alg_mac) { found = 0; break; }
1290                                         }
1291                                 else
1292                                         alg_mac = ca_list[j]->algorithm_mac;
1293                                 }
1294
1295                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1296                                 {
1297                                 if (algo_strength & SSL_EXP_MASK)
1298                                         {
1299                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1300                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1301                                         }
1302                                 else
1303                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1304                                 }
1305
1306                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1307                                 {
1308                                 if (algo_strength & SSL_STRONG_MASK)
1309                                         {
1310                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1311                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1312                                         }
1313                                 else
1314                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1315                                 }
1316
1317                         if (ca_list[j]->valid)
1318                                 {
1319                                 /* explicit ciphersuite found; its protocol version
1320                                  * does not become part of the search pattern!*/
1321
1322                                 cipher_id = ca_list[j]->id;
1323                                 }
1324                         else
1325                                 {
1326                                 /* not an explicit ciphersuite; only in this case, the
1327                                  * protocol version is considered part of the search pattern */
1328
1329                                 if (ca_list[j]->algorithm_ssl)
1330                                         {
1331                                         if (alg_ssl)
1332                                                 {
1333                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1334                                                 if (!alg_ssl) { found = 0; break; }
1335                                                 }
1336                                         else
1337                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1338                                         }
1339                                 }
1340
1341                         if (!multi) break;
1342                         }
1343
1344                 /*
1345                  * Ok, we have the rule, now apply it
1346                  */
1347                 if (rule == CIPHER_SPECIAL)
1348                         {       /* special command */
1349                         ok = 0;
1350                         if ((buflen == 8) &&
1351                                 !strncmp(buf, "STRENGTH", 8))
1352                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1353                         else
1354                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1355                                         SSL_R_INVALID_COMMAND);
1356                         if (ok == 0)
1357                                 retval = 0;
1358                         /*
1359                          * We do not support any "multi" options
1360                          * together with "@", so throw away the
1361                          * rest of the command, if any left, until
1362                          * end or ':' is found.
1363                          */
1364                         while ((*l != '\0') && !ITEM_SEP(*l))
1365                                 l++;
1366                         }
1367                 else if (found)
1368                         {
1369                         ssl_cipher_apply_rule(cipher_id,
1370                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1371                                 rule, -1, head_p, tail_p);
1372                         }
1373                 else
1374                         {
1375                         while ((*l != '\0') && !ITEM_SEP(*l))
1376                                 l++;
1377                         }
1378                 if (*l == '\0') break; /* done */
1379                 }
1380
1381         return(retval);
1382         }
1383 #ifndef OPENSSL_NO_EC
1384 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1385                                         const char **prule_str)
1386         {
1387         unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1388         if (!strcmp(*prule_str, "SUITEB128"))
1389                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1390         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1391                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1392         else if (!strcmp(*prule_str, "SUITEB128C2"))
1393                 {
1394                 suiteb_comb2 = 1;
1395                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1396                 }
1397         else if (!strcmp(*prule_str, "SUITEB192"))
1398                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1399
1400         if (suiteb_flags)
1401                 {
1402                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1403                 c->cert_flags |= suiteb_flags;
1404                 }
1405         else
1406                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1407
1408         if (!suiteb_flags)
1409                 return 1;
1410         /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1411
1412         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1413                 {
1414                 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1415                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1416                                 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1417                 else
1418                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1419                                 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1420                 return 0;
1421                 }
1422
1423         switch(suiteb_flags)
1424                 {
1425         case SSL_CERT_FLAG_SUITEB_128_LOS:
1426                 if (suiteb_comb2)
1427                         *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1428                 else
1429                         *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1430                 break;
1431         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1432                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1433                 break;
1434         case SSL_CERT_FLAG_SUITEB_192_LOS:
1435                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1436                 break;
1437                 }
1438         /* Set auto ECDH parameter determination */
1439         c->ecdh_tmp_auto = 1;
1440         return 1;
1441         }
1442 #endif
1443
1444
1445 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1446                 STACK_OF(SSL_CIPHER) **cipher_list,
1447                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1448                 const char *rule_str, CERT *c)
1449         {
1450         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1451         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1452         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1453         const char *rule_p;
1454         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1455         const SSL_CIPHER **ca_list = NULL;
1456
1457         /*
1458          * Return with error if nothing to do.
1459          */
1460         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1461                 return NULL;
1462 #ifndef OPENSSL_NO_EC
1463         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1464                 return NULL;
1465 #endif
1466
1467         /*
1468          * To reduce the work to do we only want to process the compiled
1469          * in algorithms, so we first get the mask of disabled ciphers.
1470          */
1471         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1472
1473         /*
1474          * Now we have to collect the available ciphers from the compiled
1475          * in ciphers. We cannot get more than the number compiled in, so
1476          * it is used for allocation.
1477          */
1478         num_of_ciphers = ssl_method->num_ciphers();
1479 #ifdef KSSL_DEBUG
1480         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1481 #endif    /* KSSL_DEBUG */
1482         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1483         if (co_list == NULL)
1484                 {
1485                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1486                 return(NULL);   /* Failure */
1487                 }
1488
1489         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1490                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1491                                    co_list, &head, &tail);
1492
1493
1494         /* Now arrange all ciphers by preference: */
1495
1496         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1497         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1498         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1499
1500         /* AES is our preferred symmetric cipher */
1501         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1502
1503         /* Temporarily enable everything else for sorting */
1504         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1505
1506         /* Low priority for MD5 */
1507         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1508
1509         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1510          * (For applications that allow them, they aren't too bad, but we prefer
1511          * authenticated ciphers.) */
1512         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1513
1514         /* Move ciphers without forward secrecy to the end */
1515         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1516         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1517         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1518         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1519         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1520
1521         /* RC4 is sort-of broken -- move the the end */
1522         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1523
1524         /* Now sort by symmetric encryption strength.  The above ordering remains
1525          * in force within each class */
1526         if (!ssl_cipher_strength_sort(&head, &tail))
1527                 {
1528                 OPENSSL_free(co_list);
1529                 return NULL;
1530                 }
1531
1532         /* Now disable everything (maintaining the ordering!) */
1533         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1534
1535
1536         /*
1537          * We also need cipher aliases for selecting based on the rule_str.
1538          * There might be two types of entries in the rule_str: 1) names
1539          * of ciphers themselves 2) aliases for groups of ciphers.
1540          * For 1) we need the available ciphers and for 2) the cipher
1541          * groups of cipher_aliases added together in one list (otherwise
1542          * we would be happy with just the cipher_aliases table).
1543          */
1544         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1545         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1546         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1547         if (ca_list == NULL)
1548                 {
1549                 OPENSSL_free(co_list);
1550                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1551                 return(NULL);   /* Failure */
1552                 }
1553         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1554                                    disabled_mkey, disabled_auth, disabled_enc,
1555                                    disabled_mac, disabled_ssl, head);
1556
1557         /*
1558          * If the rule_string begins with DEFAULT, apply the default rule
1559          * before using the (possibly available) additional rules.
1560          */
1561         ok = 1;
1562         rule_p = rule_str;
1563         if (strncmp(rule_str,"DEFAULT",7) == 0)
1564                 {
1565                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1566                         &head, &tail, ca_list);
1567                 rule_p += 7;
1568                 if (*rule_p == ':')
1569                         rule_p++;
1570                 }
1571
1572         if (ok && (strlen(rule_p) > 0))
1573                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1574
1575         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1576
1577         if (!ok)
1578                 {       /* Rule processing failure */
1579                 OPENSSL_free(co_list);
1580                 return(NULL);
1581                 }
1582
1583         /*
1584          * Allocate new "cipherstack" for the result, return with error
1585          * if we cannot get one.
1586          */
1587         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1588                 {
1589                 OPENSSL_free(co_list);
1590                 return(NULL);
1591                 }
1592
1593         /*
1594          * The cipher selection for the list is done. The ciphers are added
1595          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1596          */
1597         for (curr = head; curr != NULL; curr = curr->next)
1598                 {
1599 #ifdef OPENSSL_FIPS
1600                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1601 #else
1602                 if (curr->active)
1603 #endif
1604                         {
1605                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1606 #ifdef CIPHER_DEBUG
1607                         printf("<%s>\n",curr->cipher->name);
1608 #endif
1609                         }
1610                 }
1611         OPENSSL_free(co_list);  /* Not needed any longer */
1612
1613         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1614         if (tmp_cipher_list == NULL)
1615                 {
1616                 sk_SSL_CIPHER_free(cipherstack);
1617                 return NULL;
1618                 }
1619         if (*cipher_list != NULL)
1620                 sk_SSL_CIPHER_free(*cipher_list);
1621         *cipher_list = cipherstack;
1622         if (*cipher_list_by_id != NULL)
1623                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1624         *cipher_list_by_id = tmp_cipher_list;
1625         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1626
1627         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1628         return(cipherstack);
1629         }
1630
1631 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1632         {
1633         int is_export,pkl,kl;
1634         const char *ver,*exp_str;
1635         const char *kx,*au,*enc,*mac;
1636         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1637 #ifdef KSSL_DEBUG
1638         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1639 #else
1640         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1641 #endif /* KSSL_DEBUG */
1642
1643         alg_mkey = cipher->algorithm_mkey;
1644         alg_auth = cipher->algorithm_auth;
1645         alg_enc = cipher->algorithm_enc;
1646         alg_mac = cipher->algorithm_mac;
1647         alg_ssl = cipher->algorithm_ssl;
1648
1649         alg2=cipher->algorithm2;
1650
1651         is_export=SSL_C_IS_EXPORT(cipher);
1652         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1653         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1654         exp_str=is_export?" export":"";
1655
1656         if (alg_ssl & SSL_SSLV2)
1657                 ver="SSLv2";
1658         else if (alg_ssl & SSL_SSLV3)
1659                 ver="SSLv3";
1660         else if (alg_ssl & SSL_TLSV1_2)
1661                 ver="TLSv1.2";
1662         else
1663                 ver="unknown";
1664
1665         switch (alg_mkey)
1666                 {
1667         case SSL_kRSA:
1668                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1669                 break;
1670         case SSL_kDHr:
1671                 kx="DH/RSA";
1672                 break;
1673         case SSL_kDHd:
1674                 kx="DH/DSS";
1675                 break;
1676         case SSL_kKRB5:
1677                 kx="KRB5";
1678                 break;
1679         case SSL_kEDH:
1680                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1681                 break;
1682         case SSL_kECDHr:
1683                 kx="ECDH/RSA";
1684                 break;
1685         case SSL_kECDHe:
1686                 kx="ECDH/ECDSA";
1687                 break;
1688         case SSL_kEECDH:
1689                 kx="ECDH";
1690                 break;
1691         case SSL_kPSK:
1692                 kx="PSK";
1693                 break;
1694         case SSL_kSRP:
1695                 kx="SRP";
1696                 break;
1697         case SSL_kGOST:
1698                 kx="GOST";
1699                 break;
1700         default:
1701                 kx="unknown";
1702                 }
1703
1704         switch (alg_auth)
1705                 {
1706         case SSL_aRSA:
1707                 au="RSA";
1708                 break;
1709         case SSL_aDSS:
1710                 au="DSS";
1711                 break;
1712         case SSL_aDH:
1713                 au="DH";
1714                 break;
1715         case SSL_aKRB5:
1716                 au="KRB5";
1717                 break;
1718         case SSL_aECDH:
1719                 au="ECDH";
1720                 break;
1721         case SSL_aNULL:
1722                 au="None";
1723                 break;
1724         case SSL_aECDSA:
1725                 au="ECDSA";
1726                 break;
1727         case SSL_aPSK:
1728                 au="PSK";
1729                 break;
1730         case SSL_aSRP:
1731                 au="SRP";
1732                 break;
1733         case SSL_aGOST94:
1734                 au="GOST94";
1735                 break;
1736         case SSL_aGOST01:
1737                 au="GOST01";
1738                 break;
1739         default:
1740                 au="unknown";
1741                 break;
1742                 }
1743
1744         switch (alg_enc)
1745                 {
1746         case SSL_DES:
1747                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1748                 break;
1749         case SSL_3DES:
1750                 enc="3DES(168)";
1751                 break;
1752         case SSL_RC4:
1753                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1754                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1755                 break;
1756         case SSL_RC2:
1757                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1758                 break;
1759         case SSL_IDEA:
1760                 enc="IDEA(128)";
1761                 break;
1762         case SSL_eNULL:
1763                 enc="None";
1764                 break;
1765         case SSL_AES128:
1766                 enc="AES(128)";
1767                 break;
1768         case SSL_AES256:
1769                 enc="AES(256)";
1770                 break;
1771         case SSL_AES128GCM:
1772                 enc="AESGCM(128)";
1773                 break;
1774         case SSL_AES256GCM:
1775                 enc="AESGCM(256)";
1776                 break;
1777         case SSL_CAMELLIA128:
1778                 enc="Camellia(128)";
1779                 break;
1780         case SSL_CAMELLIA256:
1781                 enc="Camellia(256)";
1782                 break;
1783         case SSL_SEED:
1784                 enc="SEED(128)";
1785                 break;
1786         case SSL_eGOST2814789CNT:
1787                 enc="GOST89(256)";
1788                 break;
1789         default:
1790                 enc="unknown";
1791                 break;
1792                 }
1793
1794         switch (alg_mac)
1795                 {
1796         case SSL_MD5:
1797                 mac="MD5";
1798                 break;
1799         case SSL_SHA1:
1800                 mac="SHA1";
1801                 break;
1802         case SSL_SHA256:
1803                 mac="SHA256";
1804                 break;
1805         case SSL_SHA384:
1806                 mac="SHA384";
1807                 break;
1808         case SSL_AEAD:
1809                 mac="AEAD";
1810                 break;
1811         case SSL_GOST89MAC:
1812                 mac="GOST89";
1813                 break;
1814         case SSL_GOST94:
1815                 mac="GOST94";
1816                 break;
1817         default:
1818                 mac="unknown";
1819                 break;
1820                 }
1821
1822         if (buf == NULL)
1823                 {
1824                 len=128;
1825                 buf=OPENSSL_malloc(len);
1826                 if (buf == NULL) return("OPENSSL_malloc Error");
1827                 }
1828         else if (len < 128)
1829                 return("Buffer too small");
1830
1831 #ifdef KSSL_DEBUG
1832         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1833 #else
1834         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1835 #endif /* KSSL_DEBUG */
1836         return(buf);
1837         }
1838
1839 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1840         {
1841         int i;
1842
1843         if (c == NULL) return("(NONE)");
1844         i=(int)(c->id>>24L);
1845         if (i == 3)
1846                 return("TLSv1/SSLv3");
1847         else if (i == 2)
1848                 return("SSLv2");
1849         else
1850                 return("unknown");
1851         }
1852
1853 /* return the actual cipher being used */
1854 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1855         {
1856         if (c != NULL)
1857                 return(c->name);
1858         return("(NONE)");
1859         }
1860
1861 /* number of bits for symmetric cipher */
1862 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1863         {
1864         int ret=0;
1865
1866         if (c != NULL)
1867                 {
1868                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1869                 ret = c->strength_bits;
1870                 }
1871         return(ret);
1872         }
1873
1874 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1875         {
1876         return c->id;
1877         }
1878
1879 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1880         {
1881         SSL_COMP *ctmp;
1882         int i,nn;
1883
1884         if ((n == 0) || (sk == NULL)) return(NULL);
1885         nn=sk_SSL_COMP_num(sk);
1886         for (i=0; i<nn; i++)
1887                 {
1888                 ctmp=sk_SSL_COMP_value(sk,i);
1889                 if (ctmp->id == n)
1890                         return(ctmp);
1891                 }
1892         return(NULL);
1893         }
1894
1895 #ifdef OPENSSL_NO_COMP
1896 void *SSL_COMP_get_compression_methods(void)
1897         {
1898         return NULL;
1899         }
1900 int SSL_COMP_add_compression_method(int id, void *cm)
1901         {
1902         return 1;
1903         }
1904
1905 const char *SSL_COMP_get_name(const void *comp)
1906         {
1907         return NULL;
1908         }
1909 #else
1910 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1911         {
1912         load_builtin_compressions();
1913         return(ssl_comp_methods);
1914         }
1915
1916 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) *meths)
1917         {
1918         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1919         ssl_comp_methods = meths;
1920         return old_meths;
1921         }
1922
1923 static void cmeth_free(SSL_COMP *cm)
1924         {
1925         OPENSSL_free(cm);
1926         }
1927
1928 void SSL_COMP_free_compression_methods(void)
1929         {
1930         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1931         ssl_comp_methods = NULL;
1932         sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1933         }
1934
1935 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1936         {
1937         SSL_COMP *comp;
1938
1939         if (cm == NULL || cm->type == NID_undef)
1940                 return 1;
1941
1942         /* According to draft-ietf-tls-compression-04.txt, the
1943            compression number ranges should be the following:
1944
1945            0 to 63:    methods defined by the IETF
1946            64 to 192:  external party methods assigned by IANA
1947            193 to 255: reserved for private use */
1948         if (id < 193 || id > 255)
1949                 {
1950                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1951                 return 0;
1952                 }
1953
1954         MemCheck_off();
1955         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1956         comp->id=id;
1957         comp->method=cm;
1958         load_builtin_compressions();
1959         if (ssl_comp_methods
1960                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1961                 {
1962                 OPENSSL_free(comp);
1963                 MemCheck_on();
1964                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1965                 return(1);
1966                 }
1967         else if ((ssl_comp_methods == NULL)
1968                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1969                 {
1970                 OPENSSL_free(comp);
1971                 MemCheck_on();
1972                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1973                 return(1);
1974                 }
1975         else
1976                 {
1977                 MemCheck_on();
1978                 return(0);
1979                 }
1980         }
1981
1982 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1983         {
1984         if (comp)
1985                 return comp->name;
1986         return NULL;
1987         }
1988 #endif
1989 /* For a cipher return the index corresponding to the certificate type */
1990 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1991         {
1992         unsigned long alg_k, alg_a;
1993
1994         alg_k = c->algorithm_mkey;
1995         alg_a = c->algorithm_auth;
1996
1997         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1998                 {
1999                 /* we don't need to look at SSL_kEECDH
2000                  * since no certificate is needed for
2001                  * anon ECDH and for authenticated
2002                  * EECDH, the check for the auth
2003                  * algorithm will set i correctly
2004                  * NOTE: For ECDH-RSA, we need an ECC
2005                  * not an RSA cert but for EECDH-RSA
2006                  * we need an RSA cert. Placing the
2007                  * checks for SSL_kECDH before RSA
2008                  * checks ensures the correct cert is chosen.
2009                  */
2010                 return SSL_PKEY_ECC;
2011                 }
2012         else if (alg_a & SSL_aECDSA)
2013                 return SSL_PKEY_ECC;
2014         else if (alg_k & SSL_kDHr)
2015                 return SSL_PKEY_DH_RSA;
2016         else if (alg_k & SSL_kDHd)
2017                 return SSL_PKEY_DH_DSA;
2018         else if (alg_a & SSL_aDSS)
2019                 return SSL_PKEY_DSA_SIGN;
2020         else if (alg_a & SSL_aRSA)
2021                 return SSL_PKEY_RSA_ENC;
2022         else if (alg_a & SSL_aKRB5)
2023                 /* VRS something else here? */
2024                 return -1;
2025         else if (alg_a & SSL_aGOST94)
2026                 return SSL_PKEY_GOST94;
2027         else if (alg_a & SSL_aGOST01)
2028                 return SSL_PKEY_GOST01;
2029         return -1;
2030         }
2031
2032 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2033         {
2034         const SSL_CIPHER *c;
2035         c = ssl->method->get_cipher_by_char(ptr);
2036         if (c == NULL || c->valid == 0)
2037                 return NULL;
2038         return c;
2039         }
2040
2041 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2042         {
2043         return ssl->method->get_cipher_by_char(ptr);
2044         }