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         /* no such ciphersuites supported! */
 268         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0},
 269         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 270         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 271         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 272         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 273         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
 274         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
 275         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
 276         {0,SSL_TXT_aSRP,0,    0,SSL_aSRP,  0,0,0,0,0,0,0},
 277
 278         /* aliases combining key exchange and server authentication */
 279         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 280         {0,SSL_TXT_DHE,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 281         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 282         {0,SSL_TXT_ECDHE,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 283         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 284         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 285         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 286         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 287         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 288         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 289         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
 290
 291
 292         /* symmetric encryption aliases */
 293         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 294         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 295         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 296         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 297         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 298         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 299         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 300         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
 301         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
 302         {0,SSL_TXT_AES,0,     0,0,SSL_AES,0,0,0,0,0,0},
 303         {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
 304         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 305         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 306         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 307
 308         /* MAC aliases */
 309         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 310         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 311         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 312         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 313         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 314         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
 315         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
 316
 317         /* protocol version aliases */
 318         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 319         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 320         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 321         {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
 322
 323         /* export flag */
 324         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 325         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 326
 327         /* strength classes */
 328         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 329         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 330         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 331         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 332         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 333         /* FIPS 140-2 approved ciphersuite */
 334         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
 335        /* "DHE-" aliases to "EDH-" labels (for forward compatibility) */
 336         {0,SSL3_TXT_DHE_DSS_DES_40_CBC_SHA,0,
 337          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
 338         {0,SSL3_TXT_DHE_DSS_DES_64_CBC_SHA,0,
 339          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
 340         {0,SSL3_TXT_DHE_DSS_DES_192_CBC3_SHA,0,
 341          SSL_kDHE,SSL_aDSS,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
 342         {0,SSL3_TXT_DHE_RSA_DES_40_CBC_SHA,0,
 343          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
 344         {0,SSL3_TXT_DHE_RSA_DES_64_CBC_SHA,0,
 345          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
 346         {0,SSL3_TXT_DHE_RSA_DES_192_CBC3_SHA,0,
 347          SSL_kDHE,SSL_aRSA,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
 348         };
 349 /* Search for public key algorithm with given name and
 350  * return its pkey_id if it is available. Otherwise return 0
 351  */
 352 #ifdef OPENSSL_NO_ENGINE
 353
 354 static int get_optional_pkey_id(const char *pkey_name)
 355         {
 356         const EVP_PKEY_ASN1_METHOD *ameth;
 357         int pkey_id=0;
 358         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
 359         if (ameth)
 360                 {
 361                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 362                 }
 363         return pkey_id;
 364         }
 365
 366 #else
 367
 368 static int get_optional_pkey_id(const char *pkey_name)
 369         {
 370         const EVP_PKEY_ASN1_METHOD *ameth;
 371         ENGINE *tmpeng = NULL;
 372         int pkey_id=0;
 373         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
 374         if (ameth)
 375                 {
 376                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 377                 }
 378         if (tmpeng) ENGINE_finish(tmpeng);
 379         return pkey_id;
 380         }
 381
 382 #endif
 383
 384 void ssl_load_ciphers(void)
 385         {
 386         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 387                 EVP_get_cipherbyname(SN_des_cbc);
 388         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 389                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 390         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 391                 EVP_get_cipherbyname(SN_rc4);
 392         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 393                 EVP_get_cipherbyname(SN_rc2_cbc);
 394 #ifndef OPENSSL_NO_IDEA
 395         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 396                 EVP_get_cipherbyname(SN_idea_cbc);
 397 #else
 398         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 399 #endif
 400         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 401           EVP_get_cipherbyname(SN_aes_128_cbc);
 402         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 403           EVP_get_cipherbyname(SN_aes_256_cbc);
 404         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 405           EVP_get_cipherbyname(SN_camellia_128_cbc);
 406         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 407           EVP_get_cipherbyname(SN_camellia_256_cbc);
 408         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 409           EVP_get_cipherbyname(SN_gost89_cnt);
 410         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 411           EVP_get_cipherbyname(SN_seed_cbc);
 412
 413         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
 414           EVP_get_cipherbyname(SN_aes_128_gcm);
 415         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
 416           EVP_get_cipherbyname(SN_aes_256_gcm);
 417
 418         ssl_digest_methods[SSL_MD_MD5_IDX]=
 419                 EVP_get_digestbyname(SN_md5);
 420         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 421                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 422         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
 423         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 424                 EVP_get_digestbyname(SN_sha1);
 425         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 426                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 427         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
 428         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 429                 EVP_get_digestbyname(SN_id_GostR3411_94);
 430         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 431                 {
 432                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 433                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 434                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
 435                 }
 436         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 437                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 438                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
 439                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
 440                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 441                 }
 442
 443         ssl_digest_methods[SSL_MD_SHA256_IDX]=
 444                 EVP_get_digestbyname(SN_sha256);
 445         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
 446                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
 447         ssl_digest_methods[SSL_MD_SHA384_IDX]=
 448                 EVP_get_digestbyname(SN_sha384);
 449         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
 450                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
 451         }
 452 #ifndef OPENSSL_NO_COMP
 453
 454 static int sk_comp_cmp(const SSL_COMP * const *a,
 455                         const SSL_COMP * const *b)
 456         {
 457         return((*a)->id-(*b)->id);
 458         }
 459
 460 static void load_builtin_compressions(void)
 461         {
 462         int got_write_lock = 0;
 463
 464         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 465         if (ssl_comp_methods == NULL)
 466                 {
 467                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 468                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 469                 got_write_lock = 1;
 470
 471                 if (ssl_comp_methods == NULL)
 472                         {
 473                         SSL_COMP *comp = NULL;
 474
 475                         MemCheck_off();
 476                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 477                         if (ssl_comp_methods != NULL)
 478                                 {
 479                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 480                                 if (comp != NULL)
 481                                         {
 482                                         comp->method=COMP_zlib();
 483                                         if (comp->method
 484                                                 && comp->method->type == NID_undef)
 485                                                 OPENSSL_free(comp);
 486                                         else
 487                                                 {
 488                                                 comp->id=SSL_COMP_ZLIB_IDX;
 489                                                 comp->name=comp->method->name;
 490                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 491                                                 }
 492                                         }
 493                                         sk_SSL_COMP_sort(ssl_comp_methods);
 494                                 }
 495                         MemCheck_on();
 496                         }
 497                 }
 498
 499         if (got_write_lock)
 500                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 501         else
 502                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 503         }
 504 #endif
 505
 506 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 507              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 508         {
 509         int i;
 510         const SSL_CIPHER *c;
 511
 512         c=s->cipher;
 513         if (c == NULL) return(0);
 514         if (comp != NULL)
 515                 {
 516                 SSL_COMP ctmp;
 517 #ifndef OPENSSL_NO_COMP
 518                 load_builtin_compressions();
 519 #endif
 520
 521                 *comp=NULL;
 522                 ctmp.id=s->compress_meth;
 523                 if (ssl_comp_methods != NULL)
 524                         {
 525                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 526                         if (i >= 0)
 527                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 528                         else
 529                                 *comp=NULL;
 530                         }
 531                 }
 532
 533         if ((enc == NULL) || (md == NULL)) return(0);
 534
 535         switch (c->algorithm_enc)
 536                 {
 537         case SSL_DES:
 538                 i=SSL_ENC_DES_IDX;
 539                 break;
 540         case SSL_3DES:
 541                 i=SSL_ENC_3DES_IDX;
 542                 break;
 543         case SSL_RC4:
 544                 i=SSL_ENC_RC4_IDX;
 545                 break;
 546         case SSL_RC2:
 547                 i=SSL_ENC_RC2_IDX;
 548                 break;
 549         case SSL_IDEA:
 550                 i=SSL_ENC_IDEA_IDX;
 551                 break;
 552         case SSL_eNULL:
 553                 i=SSL_ENC_NULL_IDX;
 554                 break;
 555         case SSL_AES128:
 556                 i=SSL_ENC_AES128_IDX;
 557                 break;
 558         case SSL_AES256:
 559                 i=SSL_ENC_AES256_IDX;
 560                 break;
 561         case SSL_CAMELLIA128:
 562                 i=SSL_ENC_CAMELLIA128_IDX;
 563                 break;
 564         case SSL_CAMELLIA256:
 565                 i=SSL_ENC_CAMELLIA256_IDX;
 566                 break;
 567         case SSL_eGOST2814789CNT:
 568                 i=SSL_ENC_GOST89_IDX;
 569                 break;
 570         case SSL_SEED:
 571                 i=SSL_ENC_SEED_IDX;
 572                 break;
 573         case SSL_AES128GCM:
 574                 i=SSL_ENC_AES128GCM_IDX;
 575                 break;
 576         case SSL_AES256GCM:
 577                 i=SSL_ENC_AES256GCM_IDX;
 578                 break;
 579         default:
 580                 i= -1;
 581                 break;
 582                 }
 583
 584         if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
 585                 *enc=NULL;
 586         else
 587                 {
 588                 if (i == SSL_ENC_NULL_IDX)
 589                         *enc=EVP_enc_null();
 590                 else
 591                         *enc=ssl_cipher_methods[i];
 592                 }
 593
 594         switch (c->algorithm_mac)
 595                 {
 596         case SSL_MD5:
 597                 i=SSL_MD_MD5_IDX;
 598                 break;
 599         case SSL_SHA1:
 600                 i=SSL_MD_SHA1_IDX;
 601                 break;
 602         case SSL_SHA256:
 603                 i=SSL_MD_SHA256_IDX;
 604                 break;
 605         case SSL_SHA384:
 606                 i=SSL_MD_SHA384_IDX;
 607                 break;
 608         case SSL_GOST94:
 609                 i = SSL_MD_GOST94_IDX;
 610                 break;
 611         case SSL_GOST89MAC:
 612                 i = SSL_MD_GOST89MAC_IDX;
 613                 break;
 614         default:
 615                 i= -1;
 616                 break;
 617                 }
 618         if ((i < 0) || (i >= SSL_MD_NUM_IDX))
 619         {
 620                 *md=NULL;
 621                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 622                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 623                 if (c->algorithm_mac == SSL_AEAD)
 624                         mac_pkey_type = NULL;
 625         }
 626         else
 627         {
 628                 *md=ssl_digest_methods[i];
 629                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 630                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 631         }
 632
 633         if ((*enc != NULL) &&
 634             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
 635             (!mac_pkey_type||*mac_pkey_type != NID_undef))
 636                 {
 637                 const EVP_CIPHER *evp;
 638
 639                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
 640                     s->ssl_version < TLS1_VERSION)
 641                         return 1;
 642
 643 #ifdef OPENSSL_FIPS
 644                 if (FIPS_mode())
 645                         return 1;
 646 #endif
 647
 648                 if      (c->algorithm_enc == SSL_RC4 &&
 649                          c->algorithm_mac == SSL_MD5 &&
 650                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
 651                         *enc = evp, *md = NULL;
 652                 else if (c->algorithm_enc == SSL_AES128 &&
 653                          c->algorithm_mac == SSL_SHA1 &&
 654                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
 655                         *enc = evp, *md = NULL;
 656                 else if (c->algorithm_enc == SSL_AES256 &&
 657                          c->algorithm_mac == SSL_SHA1 &&
 658                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
 659                         *enc = evp, *md = NULL;
 660                 else if (c->algorithm_enc == SSL_AES128 &&
 661                          c->algorithm_mac == SSL_SHA256 &&
 662                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
 663                         *enc = evp, *md = NULL;
 664                 else if (c->algorithm_enc == SSL_AES256 &&
 665                          c->algorithm_mac == SSL_SHA256 &&
 666                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
 667                         *enc = evp, *md = NULL;
 668                 return(1);
 669                 }
 670         else
 671                 return(0);
 672         }
 673
 674 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
 675 {
 676         if (idx <0||idx>=SSL_MD_NUM_IDX)
 677                 {
 678                 return 0;
 679                 }
 680         *mask = ssl_handshake_digest_flag[idx];
 681         if (*mask)
 682                 *md = ssl_digest_methods[idx];
 683         else
 684                 *md = NULL;
 685         return 1;
 686 }
 687
 688 #define ITEM_SEP(a) \
 689         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 690
 691 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 692              CIPHER_ORDER **tail)
 693         {
 694         if (curr == *tail) return;
 695         if (curr == *head)
 696                 *head=curr->next;
 697         if (curr->prev != NULL)
 698                 curr->prev->next=curr->next;
 699         if (curr->next != NULL)
 700                 curr->next->prev=curr->prev;
 701         (*tail)->next=curr;
 702         curr->prev= *tail;
 703         curr->next=NULL;
 704         *tail=curr;
 705         }
 706
 707 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 708              CIPHER_ORDER **tail)
 709         {
 710         if (curr == *head) return;
 711         if (curr == *tail)
 712                 *tail=curr->prev;
 713         if (curr->next != NULL)
 714                 curr->next->prev=curr->prev;
 715         if (curr->prev != NULL)
 716                 curr->prev->next=curr->next;
 717         (*head)->prev=curr;
 718         curr->next= *head;
 719         curr->prev=NULL;
 720         *head=curr;
 721         }
 722
 723 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 724         {
 725         *mkey = 0;
 726         *auth = 0;
 727         *enc = 0;
 728         *mac = 0;
 729         *ssl = 0;
 730
 731 #ifdef OPENSSL_NO_RSA
 732         *mkey |= SSL_kRSA;
 733         *auth |= SSL_aRSA;
 734 #endif
 735 #ifdef OPENSSL_NO_DSA
 736         *auth |= SSL_aDSS;
 737 #endif
 738 #ifdef OPENSSL_NO_DH
 739         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 740         *auth |= SSL_aDH;
 741 #endif
 742 #ifdef OPENSSL_NO_KRB5
 743         *mkey |= SSL_kKRB5;
 744         *auth |= SSL_aKRB5;
 745 #endif
 746 #ifdef OPENSSL_NO_ECDSA
 747         *auth |= SSL_aECDSA;
 748 #endif
 749 #ifdef OPENSSL_NO_ECDH
 750         *mkey |= SSL_kECDHe|SSL_kECDHr;
 751         *auth |= SSL_aECDH;
 752 #endif
 753 #ifdef OPENSSL_NO_PSK
 754         *mkey |= SSL_kPSK;
 755         *auth |= SSL_aPSK;
 756 #endif
 757 #ifdef OPENSSL_NO_SRP
 758         *mkey |= SSL_kSRP;
 759 #endif
 760         /* Check for presence of GOST 34.10 algorithms, and if they
 761          * do not present, disable  appropriate auth and key exchange */
 762         if (!get_optional_pkey_id("gost94")) {
 763                 *auth |= SSL_aGOST94;
 764         }
 765         if (!get_optional_pkey_id("gost2001")) {
 766                 *auth |= SSL_aGOST01;
 767         }
 768         /* Disable GOST key exchange if no GOST signature algs are available * */
 769         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
 770                 *mkey |= SSL_kGOST;
 771         }
 772 #ifdef SSL_FORBID_ENULL
 773         *enc |= SSL_eNULL;
 774 #endif
 775
 776
 777
 778         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 779         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 780         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 781         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 782         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 783         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 784         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 785         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
 786         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
 787         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 788         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 789         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 790         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 791
 792         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 793         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 794         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
 795         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
 796         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 797         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 798
 799         }
 800
 801 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 802                 int num_of_ciphers,
 803                 unsigned long disabled_mkey, unsigned long disabled_auth,
 804                 unsigned long disabled_enc, unsigned long disabled_mac,
 805                 unsigned long disabled_ssl,
 806                 CIPHER_ORDER *co_list,
 807                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 808         {
 809         int i, co_list_num;
 810         const SSL_CIPHER *c;
 811
 812         /*
 813          * We have num_of_ciphers descriptions compiled in, depending on the
 814          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 815          * These will later be sorted in a linked list with at most num
 816          * entries.
 817          */
 818
 819         /* Get the initial list of ciphers */
 820         co_list_num = 0;        /* actual count of ciphers */
 821         for (i = 0; i < num_of_ciphers; i++)
 822                 {
 823                 c = ssl_method->get_cipher(i);
 824                 /* drop those that use any of that is not available */
 825                 if ((c != NULL) && c->valid &&
 826 #ifdef OPENSSL_FIPS
 827                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
 828 #endif
 829                     !(c->algorithm_mkey & disabled_mkey) &&
 830                     !(c->algorithm_auth & disabled_auth) &&
 831                     !(c->algorithm_enc & disabled_enc) &&
 832                     !(c->algorithm_mac & disabled_mac) &&
 833                     !(c->algorithm_ssl & disabled_ssl))
 834                         {
 835                         co_list[co_list_num].cipher = c;
 836                         co_list[co_list_num].next = NULL;
 837                         co_list[co_list_num].prev = NULL;
 838                         co_list[co_list_num].active = 0;
 839                         co_list_num++;
 840 #ifdef KSSL_DEBUG
 841                         fprintf(stderr,"\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 842 #endif  /* KSSL_DEBUG */
 843                         /*
 844                         if (!sk_push(ca_list,(char *)c)) goto err;
 845                         */
 846                         }
 847                 }
 848
 849         /*
 850          * Prepare linked list from list entries
 851          */
 852         if (co_list_num > 0)
 853                 {
 854                 co_list[0].prev = NULL;
 855
 856                 if (co_list_num > 1)
 857                         {
 858                         co_list[0].next = &co_list[1];
 859
 860                         for (i = 1; i < co_list_num - 1; i++)
 861                                 {
 862                                 co_list[i].prev = &co_list[i - 1];
 863                                 co_list[i].next = &co_list[i + 1];
 864                                 }
 865
 866                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 867                         }
 868
 869                 co_list[co_list_num - 1].next = NULL;
 870
 871                 *head_p = &co_list[0];
 872                 *tail_p = &co_list[co_list_num - 1];
 873                 }
 874         }
 875
 876 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
 877                         int num_of_group_aliases,
 878                         unsigned long disabled_mkey, unsigned long disabled_auth,
 879                         unsigned long disabled_enc, unsigned long disabled_mac,
 880                         unsigned long disabled_ssl,
 881                         CIPHER_ORDER *head)
 882         {
 883         CIPHER_ORDER *ciph_curr;
 884         const SSL_CIPHER **ca_curr;
 885         int i;
 886         unsigned long mask_mkey = ~disabled_mkey;
 887         unsigned long mask_auth = ~disabled_auth;
 888         unsigned long mask_enc = ~disabled_enc;
 889         unsigned long mask_mac = ~disabled_mac;
 890         unsigned long mask_ssl = ~disabled_ssl;
 891
 892         /*
 893          * First, add the real ciphers as already collected
 894          */
 895         ciph_curr = head;
 896         ca_curr = ca_list;
 897         while (ciph_curr != NULL)
 898                 {
 899                 *ca_curr = ciph_curr->cipher;
 900                 ca_curr++;
 901                 ciph_curr = ciph_curr->next;
 902                 }
 903
 904         /*
 905          * Now we add the available ones from the cipher_aliases[] table.
 906          * They represent either one or more algorithms, some of which
 907          * in any affected category must be supported (set in enabled_mask),
 908          * or represent a cipher strength value (will be added in any case because algorithms=0).
 909          */
 910         for (i = 0; i < num_of_group_aliases; i++)
 911                 {
 912                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 913                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 914                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 915                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 916                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 917
 918                 if (algorithm_mkey)
 919                         if ((algorithm_mkey & mask_mkey) == 0)
 920                                 continue;
 921
 922                 if (algorithm_auth)
 923                         if ((algorithm_auth & mask_auth) == 0)
 924                                 continue;
 925
 926                 if (algorithm_enc)
 927                         if ((algorithm_enc & mask_enc) == 0)
 928                                 continue;
 929
 930                 if (algorithm_mac)
 931                         if ((algorithm_mac & mask_mac) == 0)
 932                                 continue;
 933
 934                 if (algorithm_ssl)
 935                         if ((algorithm_ssl & mask_ssl) == 0)
 936                                 continue;
 937
 938                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 939                 ca_curr++;
 940                 }
 941
 942         *ca_curr = NULL;        /* end of list */
 943         }
 944
 945 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 946                 unsigned long alg_mkey, unsigned long alg_auth,
 947                 unsigned long alg_enc, unsigned long alg_mac,
 948                 unsigned long alg_ssl,
 949                 unsigned long algo_strength,
 950                 int rule, int strength_bits,
 951                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 952         {
 953         CIPHER_ORDER *head, *tail, *curr, *next, *last;
 954         const SSL_CIPHER *cp;
 955         int reverse = 0;
 956
 957 #ifdef CIPHER_DEBUG
 958         fprintf(stderr, "Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 959                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 960 #endif
 961
 962         if (rule == CIPHER_DEL)
 963                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 964
 965         head = *head_p;
 966         tail = *tail_p;
 967
 968         if (reverse)
 969                 {
 970                 next = tail;
 971                 last = head;
 972                 }
 973         else
 974                 {
 975                 next = head;
 976                 last = tail;
 977                 }
 978
 979         curr = NULL;
 980         for (;;)
 981                 {
 982                 if (curr == last) break;
 983
 984                 curr = next;
 985
 986                 if (curr == NULL) break;
 987
 988                 next = reverse ? curr->prev : curr->next;
 989
 990                 cp = curr->cipher;
 991
 992                 /*
 993                  * Selection criteria is either the value of strength_bits
 994                  * or the algorithms used.
 995                  */
 996                 if (strength_bits >= 0)
 997                         {
 998                         if (strength_bits != cp->strength_bits)
 999                                 continue;
1000                         }
1001                 else
1002                         {
1003 #ifdef CIPHER_DEBUG
1004                         fprintf(stderr, "\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);
1005 #endif
1006 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1007                         if (cipher_id && cipher_id != cp->id)
1008                                 continue;
1009 #endif
1010                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1011                                 continue;
1012                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
1013                                 continue;
1014                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
1015                                 continue;
1016                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
1017                                 continue;
1018                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1019                                 continue;
1020                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1021                                 continue;
1022                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1023                                 continue;
1024                         }
1025
1026 #ifdef CIPHER_DEBUG
1027                 fprintf(stderr, "Action = %d\n", rule);
1028 #endif
1029
1030                 /* add the cipher if it has not been added yet. */
1031                 if (rule == CIPHER_ADD)
1032                         {
1033                         /* reverse == 0 */
1034                         if (!curr->active)
1035                                 {
1036                                 ll_append_tail(&head, curr, &tail);
1037                                 curr->active = 1;
1038                                 }
1039                         }
1040                 /* Move the added cipher to this location */
1041                 else if (rule == CIPHER_ORD)
1042                         {
1043                         /* reverse == 0 */
1044                         if (curr->active)
1045                                 {
1046                                 ll_append_tail(&head, curr, &tail);
1047                                 }
1048                         }
1049                 else if (rule == CIPHER_DEL)
1050                         {
1051                         /* reverse == 1 */
1052                         if (curr->active)
1053                                 {
1054                                 /* most recently deleted ciphersuites get best positions
1055                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1056                                  * works in reverse to maintain the order) */
1057                                 ll_append_head(&head, curr, &tail);
1058                                 curr->active = 0;
1059                                 }
1060                         }
1061                 else if (rule == CIPHER_KILL)
1062                         {
1063                         /* reverse == 0 */
1064                         if (head == curr)
1065                                 head = curr->next;
1066                         else
1067                                 curr->prev->next = curr->next;
1068                         if (tail == curr)
1069                                 tail = curr->prev;
1070                         curr->active = 0;
1071                         if (curr->next != NULL)
1072                                 curr->next->prev = curr->prev;
1073                         if (curr->prev != NULL)
1074                                 curr->prev->next = curr->next;
1075                         curr->next = NULL;
1076                         curr->prev = NULL;
1077                         }
1078                 }
1079
1080         *head_p = head;
1081         *tail_p = tail;
1082         }
1083
1084 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1085                                     CIPHER_ORDER **tail_p)
1086         {
1087         int max_strength_bits, i, *number_uses;
1088         CIPHER_ORDER *curr;
1089
1090         /*
1091          * This routine sorts the ciphers with descending strength. The sorting
1092          * must keep the pre-sorted sequence, so we apply the normal sorting
1093          * routine as '+' movement to the end of the list.
1094          */
1095         max_strength_bits = 0;
1096         curr = *head_p;
1097         while (curr != NULL)
1098                 {
1099                 if (curr->active &&
1100                     (curr->cipher->strength_bits > max_strength_bits))
1101                     max_strength_bits = curr->cipher->strength_bits;
1102                 curr = curr->next;
1103                 }
1104
1105         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1106         if (!number_uses)
1107                 {
1108                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1109                 return(0);
1110                 }
1111         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1112
1113         /*
1114          * Now find the strength_bits values actually used
1115          */
1116         curr = *head_p;
1117         while (curr != NULL)
1118                 {
1119                 if (curr->active)
1120                         number_uses[curr->cipher->strength_bits]++;
1121                 curr = curr->next;
1122                 }
1123         /*
1124          * Go through the list of used strength_bits values in descending
1125          * order.
1126          */
1127         for (i = max_strength_bits; i >= 0; i--)
1128                 if (number_uses[i] > 0)
1129                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1130
1131         OPENSSL_free(number_uses);
1132         return(1);
1133         }
1134
1135 static int ssl_cipher_process_rulestr(const char *rule_str,
1136                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1137                 const SSL_CIPHER **ca_list)
1138         {
1139         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1140         const char *l, *buf;
1141         int j, multi, found, rule, retval, ok, buflen;
1142         unsigned long cipher_id = 0;
1143         char ch;
1144
1145         retval = 1;
1146         l = rule_str;
1147         for (;;)
1148                 {
1149                 ch = *l;
1150
1151                 if (ch == '\0')
1152                         break;          /* done */
1153                 if (ch == '-')
1154                         { rule = CIPHER_DEL; l++; }
1155                 else if (ch == '+')
1156                         { rule = CIPHER_ORD; l++; }
1157                 else if (ch == '!')
1158                         { rule = CIPHER_KILL; l++; }
1159                 else if (ch == '@')
1160                         { rule = CIPHER_SPECIAL; l++; }
1161                 else
1162                         { rule = CIPHER_ADD; }
1163
1164                 if (ITEM_SEP(ch))
1165                         {
1166                         l++;
1167                         continue;
1168                         }
1169
1170                 alg_mkey = 0;
1171                 alg_auth = 0;
1172                 alg_enc = 0;
1173                 alg_mac = 0;
1174                 alg_ssl = 0;
1175                 algo_strength = 0;
1176
1177                 for (;;)
1178                         {
1179                         ch = *l;
1180                         buf = l;
1181                         buflen = 0;
1182 #ifndef CHARSET_EBCDIC
1183                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1184                                 ((ch >= '0') && (ch <= '9')) ||
1185                                 ((ch >= 'a') && (ch <= 'z')) ||
1186                                  (ch == '-') || (ch == '.'))
1187 #else
1188                         while ( isalnum(ch) || (ch == '-') || (ch == '.'))
1189 #endif
1190                                  {
1191                                  ch = *(++l);
1192                                  buflen++;
1193                                  }
1194
1195                         if (buflen == 0)
1196                                 {
1197                                 /*
1198                                  * We hit something we cannot deal with,
1199                                  * it is no command or separator nor
1200                                  * alphanumeric, so we call this an error.
1201                                  */
1202                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1203                                        SSL_R_INVALID_COMMAND);
1204                                 retval = found = 0;
1205                                 l++;
1206                                 break;
1207                                 }
1208
1209                         if (rule == CIPHER_SPECIAL)
1210                                 {
1211                                 found = 0; /* unused -- avoid compiler warning */
1212                                 break;  /* special treatment */
1213                                 }
1214
1215                         /* check for multi-part specification */
1216                         if (ch == '+')
1217                                 {
1218                                 multi=1;
1219                                 l++;
1220                                 }
1221                         else
1222                                 multi=0;
1223
1224                         /*
1225                          * Now search for the cipher alias in the ca_list. Be careful
1226                          * with the strncmp, because the "buflen" limitation
1227                          * will make the rule "ADH:SOME" and the cipher
1228                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1229                          * So additionally check whether the cipher name found
1230                          * has the correct length. We can save a strlen() call:
1231                          * just checking for the '\0' at the right place is
1232                          * sufficient, we have to strncmp() anyway. (We cannot
1233                          * use strcmp(), because buf is not '\0' terminated.)
1234                          */
1235                         j = found = 0;
1236                         cipher_id = 0;
1237                         while (ca_list[j])
1238                                 {
1239                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1240                                     (ca_list[j]->name[buflen] == '\0'))
1241                                         {
1242                                         found = 1;
1243                                         break;
1244                                         }
1245                                 else
1246                                         j++;
1247                                 }
1248
1249                         if (!found)
1250                                 break;  /* ignore this entry */
1251
1252                         if (ca_list[j]->algorithm_mkey)
1253                                 {
1254                                 if (alg_mkey)
1255                                         {
1256                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1257                                         if (!alg_mkey) { found = 0; break; }
1258                                         }
1259                                 else
1260                                         alg_mkey = ca_list[j]->algorithm_mkey;
1261                                 }
1262
1263                         if (ca_list[j]->algorithm_auth)
1264                                 {
1265                                 if (alg_auth)
1266                                         {
1267                                         alg_auth &= ca_list[j]->algorithm_auth;
1268                                         if (!alg_auth) { found = 0; break; }
1269                                         }
1270                                 else
1271                                         alg_auth = ca_list[j]->algorithm_auth;
1272                                 }
1273
1274                         if (ca_list[j]->algorithm_enc)
1275                                 {
1276                                 if (alg_enc)
1277                                         {
1278                                         alg_enc &= ca_list[j]->algorithm_enc;
1279                                         if (!alg_enc) { found = 0; break; }
1280                                         }
1281                                 else
1282                                         alg_enc = ca_list[j]->algorithm_enc;
1283                                 }
1284
1285                         if (ca_list[j]->algorithm_mac)
1286                                 {
1287                                 if (alg_mac)
1288                                         {
1289                                         alg_mac &= ca_list[j]->algorithm_mac;
1290                                         if (!alg_mac) { found = 0; break; }
1291                                         }
1292                                 else
1293                                         alg_mac = ca_list[j]->algorithm_mac;
1294                                 }
1295
1296                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1297                                 {
1298                                 if (algo_strength & SSL_EXP_MASK)
1299                                         {
1300                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1301                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1302                                         }
1303                                 else
1304                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1305                                 }
1306
1307                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1308                                 {
1309                                 if (algo_strength & SSL_STRONG_MASK)
1310                                         {
1311                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1312                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1313                                         }
1314                                 else
1315                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1316                                 }
1317
1318                         if (ca_list[j]->valid)
1319                                 {
1320                                 /* explicit ciphersuite found; its protocol version
1321                                  * does not become part of the search pattern!*/
1322
1323                                 cipher_id = ca_list[j]->id;
1324                                 }
1325                         else
1326                                 {
1327                                 /* not an explicit ciphersuite; only in this case, the
1328                                  * protocol version is considered part of the search pattern */
1329
1330                                 if (ca_list[j]->algorithm_ssl)
1331                                         {
1332                                         if (alg_ssl)
1333                                                 {
1334                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1335                                                 if (!alg_ssl) { found = 0; break; }
1336                                                 }
1337                                         else
1338                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1339                                         }
1340                                 }
1341
1342                         if (!multi) break;
1343                         }
1344
1345                 /*
1346                  * Ok, we have the rule, now apply it
1347                  */
1348                 if (rule == CIPHER_SPECIAL)
1349                         {       /* special command */
1350                         ok = 0;
1351                         if ((buflen == 8) &&
1352                                 !strncmp(buf, "STRENGTH", 8))
1353                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1354                         else
1355                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1356                                         SSL_R_INVALID_COMMAND);
1357                         if (ok == 0)
1358                                 retval = 0;
1359                         /*
1360                          * We do not support any "multi" options
1361                          * together with "@", so throw away the
1362                          * rest of the command, if any left, until
1363                          * end or ':' is found.
1364                          */
1365                         while ((*l != '\0') && !ITEM_SEP(*l))
1366                                 l++;
1367                         }
1368                 else if (found)
1369                         {
1370                         ssl_cipher_apply_rule(cipher_id,
1371                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1372                                 rule, -1, head_p, tail_p);
1373                         }
1374                 else
1375                         {
1376                         while ((*l != '\0') && !ITEM_SEP(*l))
1377                                 l++;
1378                         }
1379                 if (*l == '\0') break; /* done */
1380                 }
1381
1382         return(retval);
1383         }
1384 #ifndef OPENSSL_NO_EC
1385 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1386                                         const char **prule_str)
1387         {
1388         unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1389         if (!strcmp(*prule_str, "SUITEB128"))
1390                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1391         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1392                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1393         else if (!strcmp(*prule_str, "SUITEB128C2"))
1394                 {
1395                 suiteb_comb2 = 1;
1396                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1397                 }
1398         else if (!strcmp(*prule_str, "SUITEB192"))
1399                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1400
1401         if (suiteb_flags)
1402                 {
1403                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1404                 c->cert_flags |= suiteb_flags;
1405                 }
1406         else
1407                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1408
1409         if (!suiteb_flags)
1410                 return 1;
1411         /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1412
1413         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1414                 {
1415                 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1416                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1417                                 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1418                 else
1419                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1420                                 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1421                 return 0;
1422                 }
1423
1424 #ifndef OPENSSL_NO_ECDH
1425         switch(suiteb_flags)
1426                 {
1427         case SSL_CERT_FLAG_SUITEB_128_LOS:
1428                 if (suiteb_comb2)
1429                         *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1430                 else
1431                         *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1432                 break;
1433         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1434                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1435                 break;
1436         case SSL_CERT_FLAG_SUITEB_192_LOS:
1437                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1438                 break;
1439                 }
1440         /* Set auto ECDH parameter determination */
1441         c->ecdh_tmp_auto = 1;
1442         return 1;
1443 #else
1444         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1445         return 0;
1446 #endif
1447         }
1448 #endif
1449
1450
1451 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1452                 STACK_OF(SSL_CIPHER) **cipher_list,
1453                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1454                 const char *rule_str, CERT *c)
1455         {
1456         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1457         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1458         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1459         const char *rule_p;
1460         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1461         const SSL_CIPHER **ca_list = NULL;
1462
1463         /*
1464          * Return with error if nothing to do.
1465          */
1466         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1467                 return NULL;
1468 #ifndef OPENSSL_NO_EC
1469         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1470                 return NULL;
1471 #endif
1472
1473         /*
1474          * To reduce the work to do we only want to process the compiled
1475          * in algorithms, so we first get the mask of disabled ciphers.
1476          */
1477         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1478
1479         /*
1480          * Now we have to collect the available ciphers from the compiled
1481          * in ciphers. We cannot get more than the number compiled in, so
1482          * it is used for allocation.
1483          */
1484         num_of_ciphers = ssl_method->num_ciphers();
1485 #ifdef KSSL_DEBUG
1486         fprintf(stderr,"ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1487 #endif    /* KSSL_DEBUG */
1488         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1489         if (co_list == NULL)
1490                 {
1491                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1492                 return(NULL);   /* Failure */
1493                 }
1494
1495         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1496                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1497                                    co_list, &head, &tail);
1498
1499
1500         /* Now arrange all ciphers by preference: */
1501
1502         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1503         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1504         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1505
1506         /* AES is our preferred symmetric cipher */
1507         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1508
1509         /* Temporarily enable everything else for sorting */
1510         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1511
1512         /* Low priority for MD5 */
1513         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1514
1515         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1516          * (For applications that allow them, they aren't too bad, but we prefer
1517          * authenticated ciphers.) */
1518         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1519
1520         /* Move ciphers without forward secrecy to the end */
1521         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1522         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1523         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1524         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1525         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1526
1527         /* RC4 is sort-of broken -- move the the end */
1528         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1529
1530         /* Now sort by symmetric encryption strength.  The above ordering remains
1531          * in force within each class */
1532         if (!ssl_cipher_strength_sort(&head, &tail))
1533                 {
1534                 OPENSSL_free(co_list);
1535                 return NULL;
1536                 }
1537
1538         /* Now disable everything (maintaining the ordering!) */
1539         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1540
1541
1542         /*
1543          * We also need cipher aliases for selecting based on the rule_str.
1544          * There might be two types of entries in the rule_str: 1) names
1545          * of ciphers themselves 2) aliases for groups of ciphers.
1546          * For 1) we need the available ciphers and for 2) the cipher
1547          * groups of cipher_aliases added together in one list (otherwise
1548          * we would be happy with just the cipher_aliases table).
1549          */
1550         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1551         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1552         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1553         if (ca_list == NULL)
1554                 {
1555                 OPENSSL_free(co_list);
1556                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1557                 return(NULL);   /* Failure */
1558                 }
1559         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1560                                    disabled_mkey, disabled_auth, disabled_enc,
1561                                    disabled_mac, disabled_ssl, head);
1562
1563         /*
1564          * If the rule_string begins with DEFAULT, apply the default rule
1565          * before using the (possibly available) additional rules.
1566          */
1567         ok = 1;
1568         rule_p = rule_str;
1569         if (strncmp(rule_str,"DEFAULT",7) == 0)
1570                 {
1571                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1572                         &head, &tail, ca_list);
1573                 rule_p += 7;
1574                 if (*rule_p == ':')
1575                         rule_p++;
1576                 }
1577
1578         if (ok && (strlen(rule_p) > 0))
1579                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1580
1581         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1582
1583         if (!ok)
1584                 {       /* Rule processing failure */
1585                 OPENSSL_free(co_list);
1586                 return(NULL);
1587                 }
1588
1589         /*
1590          * Allocate new "cipherstack" for the result, return with error
1591          * if we cannot get one.
1592          */
1593         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1594                 {
1595                 OPENSSL_free(co_list);
1596                 return(NULL);
1597                 }
1598
1599         /*
1600          * The cipher selection for the list is done. The ciphers are added
1601          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1602          */
1603         for (curr = head; curr != NULL; curr = curr->next)
1604                 {
1605 #ifdef OPENSSL_FIPS
1606                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1607 #else
1608                 if (curr->active)
1609 #endif
1610                         {
1611                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1612 #ifdef CIPHER_DEBUG
1613                         fprintf(stderr, "<%s>\n",curr->cipher->name);
1614 #endif
1615                         }
1616                 }
1617         OPENSSL_free(co_list);  /* Not needed any longer */
1618
1619         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1620         if (tmp_cipher_list == NULL)
1621                 {
1622                 sk_SSL_CIPHER_free(cipherstack);
1623                 return NULL;
1624                 }
1625         if (*cipher_list != NULL)
1626                 sk_SSL_CIPHER_free(*cipher_list);
1627         *cipher_list = cipherstack;
1628         if (*cipher_list_by_id != NULL)
1629                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1630         *cipher_list_by_id = tmp_cipher_list;
1631         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1632
1633         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1634         return(cipherstack);
1635         }
1636
1637 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1638         {
1639         int is_export,pkl,kl;
1640         const char *ver,*exp_str;
1641         const char *kx,*au,*enc,*mac;
1642         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1643 #ifdef KSSL_DEBUG
1644         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1645 #else
1646         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1647 #endif /* KSSL_DEBUG */
1648
1649         alg_mkey = cipher->algorithm_mkey;
1650         alg_auth = cipher->algorithm_auth;
1651         alg_enc = cipher->algorithm_enc;
1652         alg_mac = cipher->algorithm_mac;
1653         alg_ssl = cipher->algorithm_ssl;
1654
1655         alg2=cipher->algorithm2;
1656
1657         is_export=SSL_C_IS_EXPORT(cipher);
1658         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1659         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1660         exp_str=is_export?" export":"";
1661
1662         if (alg_ssl & SSL_SSLV2)
1663                 ver="SSLv2";
1664         else if (alg_ssl & SSL_SSLV3)
1665                 ver="SSLv3";
1666         else if (alg_ssl & SSL_TLSV1_2)
1667                 ver="TLSv1.2";
1668         else
1669                 ver="unknown";
1670
1671         switch (alg_mkey)
1672                 {
1673         case SSL_kRSA:
1674                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1675                 break;
1676         case SSL_kDHr:
1677                 kx="DH/RSA";
1678                 break;
1679         case SSL_kDHd:
1680                 kx="DH/DSS";
1681                 break;
1682         case SSL_kKRB5:
1683                 kx="KRB5";
1684                 break;
1685         case SSL_kEDH:
1686                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1687                 break;
1688         case SSL_kECDHr:
1689                 kx="ECDH/RSA";
1690                 break;
1691         case SSL_kECDHe:
1692                 kx="ECDH/ECDSA";
1693                 break;
1694         case SSL_kEECDH:
1695                 kx="ECDH";
1696                 break;
1697         case SSL_kPSK:
1698                 kx="PSK";
1699                 break;
1700         case SSL_kSRP:
1701                 kx="SRP";
1702                 break;
1703         case SSL_kGOST:
1704                 kx="GOST";
1705                 break;
1706         default:
1707                 kx="unknown";
1708                 }
1709
1710         switch (alg_auth)
1711                 {
1712         case SSL_aRSA:
1713                 au="RSA";
1714                 break;
1715         case SSL_aDSS:
1716                 au="DSS";
1717                 break;
1718         case SSL_aDH:
1719                 au="DH";
1720                 break;
1721         case SSL_aKRB5:
1722                 au="KRB5";
1723                 break;
1724         case SSL_aECDH:
1725                 au="ECDH";
1726                 break;
1727         case SSL_aNULL:
1728                 au="None";
1729                 break;
1730         case SSL_aECDSA:
1731                 au="ECDSA";
1732                 break;
1733         case SSL_aPSK:
1734                 au="PSK";
1735                 break;
1736         case SSL_aSRP:
1737                 au="SRP";
1738                 break;
1739         case SSL_aGOST94:
1740                 au="GOST94";
1741                 break;
1742         case SSL_aGOST01:
1743                 au="GOST01";
1744                 break;
1745         default:
1746                 au="unknown";
1747                 break;
1748                 }
1749
1750         switch (alg_enc)
1751                 {
1752         case SSL_DES:
1753                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1754                 break;
1755         case SSL_3DES:
1756                 enc="3DES(168)";
1757                 break;
1758         case SSL_RC4:
1759                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1760                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1761                 break;
1762         case SSL_RC2:
1763                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1764                 break;
1765         case SSL_IDEA:
1766                 enc="IDEA(128)";
1767                 break;
1768         case SSL_eNULL:
1769                 enc="None";
1770                 break;
1771         case SSL_AES128:
1772                 enc="AES(128)";
1773                 break;
1774         case SSL_AES256:
1775                 enc="AES(256)";
1776                 break;
1777         case SSL_AES128GCM:
1778                 enc="AESGCM(128)";
1779                 break;
1780         case SSL_AES256GCM:
1781                 enc="AESGCM(256)";
1782                 break;
1783         case SSL_CAMELLIA128:
1784                 enc="Camellia(128)";
1785                 break;
1786         case SSL_CAMELLIA256:
1787                 enc="Camellia(256)";
1788                 break;
1789         case SSL_SEED:
1790                 enc="SEED(128)";
1791                 break;
1792         case SSL_eGOST2814789CNT:
1793                 enc="GOST89(256)";
1794                 break;
1795         default:
1796                 enc="unknown";
1797                 break;
1798                 }
1799
1800         switch (alg_mac)
1801                 {
1802         case SSL_MD5:
1803                 mac="MD5";
1804                 break;
1805         case SSL_SHA1:
1806                 mac="SHA1";
1807                 break;
1808         case SSL_SHA256:
1809                 mac="SHA256";
1810                 break;
1811         case SSL_SHA384:
1812                 mac="SHA384";
1813                 break;
1814         case SSL_AEAD:
1815                 mac="AEAD";
1816                 break;
1817         case SSL_GOST89MAC:
1818                 mac="GOST89";
1819                 break;
1820         case SSL_GOST94:
1821                 mac="GOST94";
1822                 break;
1823         default:
1824                 mac="unknown";
1825                 break;
1826                 }
1827
1828         if (buf == NULL)
1829                 {
1830                 len=128;
1831                 buf=OPENSSL_malloc(len);
1832                 if (buf == NULL) return("OPENSSL_malloc Error");
1833                 }
1834         else if (len < 128)
1835                 return("Buffer too small");
1836
1837 #ifdef KSSL_DEBUG
1838         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1839 #else
1840         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1841 #endif /* KSSL_DEBUG */
1842         return(buf);
1843         }
1844
1845 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1846         {
1847         int i;
1848
1849         if (c == NULL) return("(NONE)");
1850         i=(int)(c->id>>24L);
1851         if (i == 3)
1852                 return("TLSv1/SSLv3");
1853         else if (i == 2)
1854                 return("SSLv2");
1855         else
1856                 return("unknown");
1857         }
1858
1859 /* return the actual cipher being used */
1860 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1861         {
1862         if (c != NULL)
1863                 return(c->name);
1864         return("(NONE)");
1865         }
1866
1867 /* number of bits for symmetric cipher */
1868 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1869         {
1870         int ret=0;
1871
1872         if (c != NULL)
1873                 {
1874                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1875                 ret = c->strength_bits;
1876                 }
1877         return(ret);
1878         }
1879
1880 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1881         {
1882         return c->id;
1883         }
1884
1885 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1886         {
1887         SSL_COMP *ctmp;
1888         int i,nn;
1889
1890         if ((n == 0) || (sk == NULL)) return(NULL);
1891         nn=sk_SSL_COMP_num(sk);
1892         for (i=0; i<nn; i++)
1893                 {
1894                 ctmp=sk_SSL_COMP_value(sk,i);
1895                 if (ctmp->id == n)
1896                         return(ctmp);
1897                 }
1898         return(NULL);
1899         }
1900
1901 #ifdef OPENSSL_NO_COMP
1902 void *SSL_COMP_get_compression_methods(void)
1903         {
1904         return NULL;
1905         }
1906 int SSL_COMP_add_compression_method(int id, void *cm)
1907         {
1908         return 1;
1909         }
1910
1911 const char *SSL_COMP_get_name(const void *comp)
1912         {
1913         return NULL;
1914         }
1915 #else
1916 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1917         {
1918         load_builtin_compressions();
1919         return(ssl_comp_methods);
1920         }
1921
1922 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) *meths)
1923         {
1924         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1925         ssl_comp_methods = meths;
1926         return old_meths;
1927         }
1928
1929 static void cmeth_free(SSL_COMP *cm)
1930         {
1931         OPENSSL_free(cm);
1932         }
1933
1934 void SSL_COMP_free_compression_methods(void)
1935         {
1936         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1937         ssl_comp_methods = NULL;
1938         sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1939         }
1940
1941 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1942         {
1943         SSL_COMP *comp;
1944
1945         if (cm == NULL || cm->type == NID_undef)
1946                 return 1;
1947
1948         /*-
1949          * According to draft-ietf-tls-compression-04.txt, the
1950          * compression number ranges should be the following:
1951          *
1952          *   0 to  63:  methods defined by the IETF
1953          *  64 to 192:  external party methods assigned by IANA
1954          * 193 to 255:  reserved for private use
1955          */
1956         if (id < 193 || id > 255)
1957                 {
1958                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1959                 return 0;
1960                 }
1961
1962         MemCheck_off();
1963         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1964         comp->id=id;
1965         comp->method=cm;
1966         load_builtin_compressions();
1967         if (ssl_comp_methods
1968                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1969                 {
1970                 OPENSSL_free(comp);
1971                 MemCheck_on();
1972                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1973                 return(1);
1974                 }
1975         else if ((ssl_comp_methods == NULL)
1976                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1977                 {
1978                 OPENSSL_free(comp);
1979                 MemCheck_on();
1980                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1981                 return(1);
1982                 }
1983         else
1984                 {
1985                 MemCheck_on();
1986                 return(0);
1987                 }
1988         }
1989
1990 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1991         {
1992         if (comp)
1993                 return comp->name;
1994         return NULL;
1995         }
1996 #endif
1997 /* For a cipher return the index corresponding to the certificate type */
1998 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1999         {
2000         unsigned long alg_k, alg_a;
2001
2002         alg_k = c->algorithm_mkey;
2003         alg_a = c->algorithm_auth;
2004
2005         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2006                 {
2007                 /* we don't need to look at SSL_kEECDH
2008                  * since no certificate is needed for
2009                  * anon ECDH and for authenticated
2010                  * EECDH, the check for the auth
2011                  * algorithm will set i correctly
2012                  * NOTE: For ECDH-RSA, we need an ECC
2013                  * not an RSA cert but for EECDH-RSA
2014                  * we need an RSA cert. Placing the
2015                  * checks for SSL_kECDH before RSA
2016                  * checks ensures the correct cert is chosen.
2017                  */
2018                 return SSL_PKEY_ECC;
2019                 }
2020         else if (alg_a & SSL_aECDSA)
2021                 return SSL_PKEY_ECC;
2022         else if (alg_k & SSL_kDHr)
2023                 return SSL_PKEY_DH_RSA;
2024         else if (alg_k & SSL_kDHd)
2025                 return SSL_PKEY_DH_DSA;
2026         else if (alg_a & SSL_aDSS)
2027                 return SSL_PKEY_DSA_SIGN;
2028         else if (alg_a & SSL_aRSA)
2029                 return SSL_PKEY_RSA_ENC;
2030         else if (alg_a & SSL_aKRB5)
2031                 /* VRS something else here? */
2032                 return -1;
2033         else if (alg_a & SSL_aGOST94)
2034                 return SSL_PKEY_GOST94;
2035         else if (alg_a & SSL_aGOST01)
2036                 return SSL_PKEY_GOST01;
2037         return -1;
2038         }
2039
2040 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2041         {
2042         const SSL_CIPHER *c;
2043         c = ssl->method->get_cipher_by_char(ptr);
2044         if (c == NULL || c->valid == 0)
2045                 return NULL;
2046         return c;
2047         }
2048
2049 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2050         {
2051         return ssl->method->get_cipher_by_char(ptr);
2052         }