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 #include <openssl/comp.h>
 146 #include <openssl/engine.h>
 147 #include "ssl_locl.h"
 148
 149 #define SSL_ENC_DES_IDX         0
 150 #define SSL_ENC_3DES_IDX        1
 151 #define SSL_ENC_RC4_IDX         2
 152 #define SSL_ENC_RC2_IDX         3
 153 #define SSL_ENC_IDEA_IDX        4
 154 #define SSL_ENC_NULL_IDX        5
 155 #define SSL_ENC_AES128_IDX      6
 156 #define SSL_ENC_AES256_IDX      7
 157 #define SSL_ENC_CAMELLIA128_IDX 8
 158 #define SSL_ENC_CAMELLIA256_IDX 9
 159 #define SSL_ENC_GOST89_IDX      10
 160 #define SSL_ENC_SEED_IDX        11
 161 #define SSL_ENC_NUM_IDX         12
 162
 163
 164 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
 165         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 166         };
 167
 168 #define SSL_COMP_NULL_IDX       0
 169 #define SSL_COMP_ZLIB_IDX       1
 170 #define SSL_COMP_NUM_IDX        2
 171
 172 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
 173
 174 #define SSL_MD_MD5_IDX  0
 175 #define SSL_MD_SHA1_IDX 1
 176 #define SSL_MD_GOST94_IDX 2
 177 #define SSL_MD_GOST89MAC_IDX 3
 178 #define SSL_MD_NUM_IDX  4
 179 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
 180         NULL,NULL,NULL,NULL
 181         };
 182 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
 183  * implementation is engine-provided, we'll fill it only if
 184  * corresponding EVP_PKEY_METHOD is found
 185  */
 186 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
 187         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef
 188         };
 189
 190 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
 191         0,0,0,0
 192         };
 193
 194 #define CIPHER_ADD      1
 195 #define CIPHER_KILL     2
 196 #define CIPHER_DEL      3
 197 #define CIPHER_ORD      4
 198 #define CIPHER_SPECIAL  5
 199
 200 typedef struct cipher_order_st
 201         {
 202         SSL_CIPHER *cipher;
 203         int active;
 204         int dead;
 205         struct cipher_order_st *next,*prev;
 206         } CIPHER_ORDER;
 207
 208 static const SSL_CIPHER cipher_aliases[]={
 209         /* "ALL" doesn't include eNULL (must be specifically enabled) */
 210         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
 211         /* "COMPLEMENTOFALL" */
 212         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
 213
 214         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
 215         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
 216
 217         /* key exchange aliases
 218          * (some of those using only a single bit here combine
 219          * multiple key exchange algs according to the RFCs,
 220          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
 221         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
 222
 223         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 224         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 225         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 226         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
 227         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
 228
 229         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
 230
 231         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
 232         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
 233         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
 234         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
 235         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
 236
 237         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
 238
 239
 240         /* server authentication aliases */
 241         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
 242         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
 243         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
 244         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
 245         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
 246         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
 247         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
 248         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
 249         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
 250         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
 251
 252
 253         /* aliases combining key exchange and server authentication */
 254         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
 255         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
 256         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
 257         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
 258         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
 259         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
 260         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
 261         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
 262
 263
 264         /* symmetric encryption aliases */
 265         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
 266         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
 267         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
 268         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
 269         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
 270         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
 271         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
 272         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
 273         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
 274         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
 275         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
 276         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
 277         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
 278
 279         /* MAC aliases */
 280         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
 281         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
 282         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
 283         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
 284         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
 285
 286         /* protocol version aliases */
 287         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
 288         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
 289         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
 290
 291         /* export flag */
 292         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
 293         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
 294
 295         /* strength classes */
 296         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
 297         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
 298         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
 299         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
 300         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
 301         };
 302
 303 void ssl_load_ciphers(void)
 304         {
 305         ssl_cipher_methods[SSL_ENC_DES_IDX]=
 306                 EVP_get_cipherbyname(SN_des_cbc);
 307         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
 308                 EVP_get_cipherbyname(SN_des_ede3_cbc);
 309         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
 310                 EVP_get_cipherbyname(SN_rc4);
 311         ssl_cipher_methods[SSL_ENC_RC2_IDX]=
 312                 EVP_get_cipherbyname(SN_rc2_cbc);
 313 #ifndef OPENSSL_NO_IDEA
 314         ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
 315                 EVP_get_cipherbyname(SN_idea_cbc);
 316 #else
 317         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
 318 #endif
 319         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
 320           EVP_get_cipherbyname(SN_aes_128_cbc);
 321         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
 322           EVP_get_cipherbyname(SN_aes_256_cbc);
 323         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
 324           EVP_get_cipherbyname(SN_camellia_128_cbc);
 325         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
 326           EVP_get_cipherbyname(SN_camellia_256_cbc);
 327         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
 328           EVP_get_cipherbyname(SN_gost89_cnt);
 329         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
 330           EVP_get_cipherbyname(SN_seed_cbc);
 331
 332         ssl_digest_methods[SSL_MD_MD5_IDX]=
 333                 EVP_get_digestbyname(SN_md5);
 334         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
 335                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
 336         ssl_digest_methods[SSL_MD_SHA1_IDX]=
 337                 EVP_get_digestbyname(SN_sha1);
 338         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
 339                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
 340         ssl_digest_methods[SSL_MD_GOST94_IDX]=
 341                 EVP_get_digestbyname(SN_id_GostR3411_94);
 342         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
 343                 {
 344                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
 345                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
 346                 }
 347         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
 348                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
 349                 {
 350                 const EVP_PKEY_ASN1_METHOD *ameth;
 351                 ENGINE *tmpeng = NULL;
 352                 int pkey_id;
 353                 ameth = EVP_PKEY_asn1_find_str(&tmpeng,"gost-mac",-1);
 354                 if (ameth)
 355                         {
 356                         EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
 357                         ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]= pkey_id;
 358                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
 359                         }
 360                 if (tmpeng) ENGINE_finish(tmpeng);
 361                 }
 362
 363         }
 364 #ifndef OPENSSL_NO_COMP
 365
 366 static int sk_comp_cmp(const SSL_COMP * const *a,
 367                         const SSL_COMP * const *b)
 368         {
 369         return((*a)->id-(*b)->id);
 370         }
 371
 372 static void load_builtin_compressions(void)
 373         {
 374         int got_write_lock = 0;
 375
 376         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
 377         if (ssl_comp_methods == NULL)
 378                 {
 379                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 380                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
 381                 got_write_lock = 1;
 382
 383                 if (ssl_comp_methods == NULL)
 384                         {
 385                         SSL_COMP *comp = NULL;
 386
 387                         MemCheck_off();
 388                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
 389                         if (ssl_comp_methods != NULL)
 390                                 {
 391                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
 392                                 if (comp != NULL)
 393                                         {
 394                                         comp->method=COMP_zlib();
 395                                         if (comp->method
 396                                                 && comp->method->type == NID_undef)
 397                                                 OPENSSL_free(comp);
 398                                         else
 399                                                 {
 400                                                 comp->id=SSL_COMP_ZLIB_IDX;
 401                                                 comp->name=comp->method->name;
 402                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
 403                                                 }
 404                                         }
 405                                 }
 406                         MemCheck_on();
 407                         }
 408                 }
 409
 410         if (got_write_lock)
 411                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
 412         else
 413                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
 414         }
 415 #endif
 416
 417 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
 418              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
 419         {
 420         int i;
 421         SSL_CIPHER *c;
 422
 423         c=s->cipher;
 424         if (c == NULL) return(0);
 425         if (comp != NULL)
 426                 {
 427                 SSL_COMP ctmp;
 428 #ifndef OPENSSL_NO_COMP
 429                 load_builtin_compressions();
 430 #endif
 431
 432                 *comp=NULL;
 433                 ctmp.id=s->compress_meth;
 434                 if (ssl_comp_methods != NULL)
 435                         {
 436                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
 437                         if (i >= 0)
 438                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
 439                         else
 440                                 *comp=NULL;
 441                         }
 442                 }
 443
 444         if ((enc == NULL) || (md == NULL)) return(0);
 445
 446         switch (c->algorithm_enc)
 447                 {
 448         case SSL_DES:
 449                 i=SSL_ENC_DES_IDX;
 450                 break;
 451         case SSL_3DES:
 452                 i=SSL_ENC_3DES_IDX;
 453                 break;
 454         case SSL_RC4:
 455                 i=SSL_ENC_RC4_IDX;
 456                 break;
 457         case SSL_RC2:
 458                 i=SSL_ENC_RC2_IDX;
 459                 break;
 460         case SSL_IDEA:
 461                 i=SSL_ENC_IDEA_IDX;
 462                 break;
 463         case SSL_eNULL:
 464                 i=SSL_ENC_NULL_IDX;
 465                 break;
 466         case SSL_AES128:
 467                 i=SSL_ENC_AES128_IDX;
 468                 break;
 469         case SSL_AES256:
 470                 i=SSL_ENC_AES256_IDX;
 471                 break;
 472         case SSL_CAMELLIA128:
 473                 i=SSL_ENC_CAMELLIA128_IDX;
 474                 break;
 475         case SSL_CAMELLIA256:
 476                 i=SSL_ENC_CAMELLIA256_IDX;
 477                 break;
 478         case SSL_eGOST2814789CNT:
 479                 i=SSL_ENC_GOST89_IDX;
 480                 break;
 481         case SSL_SEED:
 482                 i=SSL_ENC_SEED_IDX;
 483                 break;
 484         default:
 485                 i= -1;
 486                 break;
 487                 }
 488
 489         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
 490                 *enc=NULL;
 491         else
 492                 {
 493                 if (i == SSL_ENC_NULL_IDX)
 494                         *enc=EVP_enc_null();
 495                 else
 496                         *enc=ssl_cipher_methods[i];
 497                 }
 498
 499         switch (c->algorithm_mac)
 500                 {
 501         case SSL_MD5:
 502                 i=SSL_MD_MD5_IDX;
 503                 break;
 504         case SSL_SHA1:
 505                 i=SSL_MD_SHA1_IDX;
 506                 break;
 507         case SSL_GOST94:
 508                 i = SSL_MD_GOST94_IDX;
 509                 break;
 510         case SSL_GOST89MAC:
 511                 i = SSL_MD_GOST89MAC_IDX;
 512                 break;
 513         default:
 514                 i= -1;
 515                 break;
 516                 }
 517         if ((i < 0) || (i > SSL_MD_NUM_IDX))
 518         {
 519                 *md=NULL;
 520                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
 521                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
 522
 523         }
 524         else
 525         {
 526                 *md=ssl_digest_methods[i];
 527                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
 528                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
 529         }
 530
 531         if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef))
 532                 return(1);
 533         else
 534                 return(0);
 535         }
 536
 537 #define ITEM_SEP(a) \
 538         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
 539
 540 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 541              CIPHER_ORDER **tail)
 542         {
 543         if (curr == *tail) return;
 544         if (curr == *head)
 545                 *head=curr->next;
 546         if (curr->prev != NULL)
 547                 curr->prev->next=curr->next;
 548         if (curr->next != NULL)
 549                 curr->next->prev=curr->prev;
 550         (*tail)->next=curr;
 551         curr->prev= *tail;
 552         curr->next=NULL;
 553         *tail=curr;
 554         }
 555
 556 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
 557              CIPHER_ORDER **tail)
 558         {
 559         if (curr == *head) return;
 560         if (curr == *tail)
 561                 *tail=curr->prev;
 562         if (curr->next != NULL)
 563                 curr->next->prev=curr->prev;
 564         if (curr->prev != NULL)
 565                 curr->prev->next=curr->next;
 566         (*head)->prev=curr;
 567         curr->next= *head;
 568         curr->prev=NULL;
 569         *head=curr;
 570         }
 571
 572 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
 573         {
 574         *mkey = 0;
 575         *auth = 0;
 576         *enc = 0;
 577         *mac = 0;
 578         *ssl = 0;
 579
 580 #ifdef OPENSSL_NO_RSA
 581         *mkey |= SSL_kRSA;
 582         *auth |= SSL_aRSA;
 583 #endif
 584 #ifdef OPENSSL_NO_DSA
 585         *auth |= SSL_aDSS;
 586 #endif
 587         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
 588         *auth |= SSL_aDH;
 589 #ifdef OPENSSL_NO_DH
 590         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
 591         *auth |= SSL_aDH;
 592 #endif
 593 #ifdef OPENSSL_NO_KRB5
 594         *mkey |= SSL_kKRB5;
 595         *auth |= SSL_aKRB5;
 596 #endif
 597 #ifdef OPENSSL_NO_ECDSA
 598         *auth |= SSL_aECDSA;
 599 #endif
 600 #ifdef OPENSSL_NO_ECDH
 601         *mkey |= SSL_kECDHe|SSL_kECDHr;
 602         *auth |= SSL_aECDH;
 603 #endif
 604 #ifdef OPENSSL_NO_PSK
 605         *mkey |= SSL_kPSK;
 606         *auth |= SSL_aPSK;
 607 #endif
 608 #ifdef SSL_FORBID_ENULL
 609         *enc |= SSL_eNULL;
 610 #endif
 611
 612         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
 613         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
 614         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
 615         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
 616         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
 617         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
 618         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
 619         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
 620         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
 621         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
 622         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
 623
 624         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
 625         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
 626         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
 627         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
 628
 629         }
 630
 631 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
 632                 int num_of_ciphers,
 633                 unsigned long disabled_mkey, unsigned long disabled_auth,
 634                 unsigned long disabled_enc, unsigned long disabled_mac,
 635                 unsigned long disabled_ssl,
 636                 CIPHER_ORDER *co_list,
 637                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 638         {
 639         int i, co_list_num;
 640         SSL_CIPHER *c;
 641
 642         /*
 643          * We have num_of_ciphers descriptions compiled in, depending on the
 644          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
 645          * These will later be sorted in a linked list with at most num
 646          * entries.
 647          */
 648
 649         /* Get the initial list of ciphers */
 650         co_list_num = 0;        /* actual count of ciphers */
 651         for (i = 0; i < num_of_ciphers; i++)
 652                 {
 653                 c = ssl_method->get_cipher(i);
 654                 /* drop those that use any of that is not available */
 655                 if ((c != NULL) && c->valid &&
 656                     !(c->algorithm_mkey & disabled_mkey) &&
 657                     !(c->algorithm_auth & disabled_auth) &&
 658                     !(c->algorithm_enc & disabled_enc) &&
 659                     !(c->algorithm_mac & disabled_mac) &&
 660                     !(c->algorithm_ssl & disabled_ssl))
 661                         {
 662                         co_list[co_list_num].cipher = c;
 663                         co_list[co_list_num].next = NULL;
 664                         co_list[co_list_num].prev = NULL;
 665                         co_list[co_list_num].active = 0;
 666                         co_list_num++;
 667 #ifdef KSSL_DEBUG
 668                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
 669 #endif  /* KSSL_DEBUG */
 670                         /*
 671                         if (!sk_push(ca_list,(char *)c)) goto err;
 672                         */
 673                         }
 674                 }
 675
 676         /*
 677          * Prepare linked list from list entries
 678          */
 679         if (co_list_num > 0)
 680                 {
 681                 co_list[0].prev = NULL;
 682
 683                 if (co_list_num > 1)
 684                         {
 685                         co_list[0].next = &co_list[1];
 686
 687                         for (i = 1; i < co_list_num - 1; i++)
 688                                 {
 689                                 co_list[i].prev = &co_list[i - 1];
 690                                 co_list[i].next = &co_list[i + 1];
 691                                 }
 692
 693                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
 694                         }
 695
 696                 co_list[co_list_num - 1].next = NULL;
 697
 698                 *head_p = &co_list[0];
 699                 *tail_p = &co_list[co_list_num - 1];
 700                 }
 701         }
 702
 703 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
 704                         int num_of_group_aliases,
 705                         unsigned long disabled_mkey, unsigned long disabled_auth,
 706                         unsigned long disabled_enc, unsigned long disabled_mac,
 707                         unsigned long disabled_ssl,
 708                         CIPHER_ORDER *head)
 709         {
 710         CIPHER_ORDER *ciph_curr;
 711         SSL_CIPHER **ca_curr;
 712         int i;
 713         unsigned long mask_mkey = ~disabled_mkey;
 714         unsigned long mask_auth = ~disabled_auth;
 715         unsigned long mask_enc = ~disabled_enc;
 716         unsigned long mask_mac = ~disabled_mac;
 717         unsigned long mask_ssl = ~disabled_ssl;
 718
 719         /*
 720          * First, add the real ciphers as already collected
 721          */
 722         ciph_curr = head;
 723         ca_curr = ca_list;
 724         while (ciph_curr != NULL)
 725                 {
 726                 *ca_curr = ciph_curr->cipher;
 727                 ca_curr++;
 728                 ciph_curr = ciph_curr->next;
 729                 }
 730
 731         /*
 732          * Now we add the available ones from the cipher_aliases[] table.
 733          * They represent either one or more algorithms, some of which
 734          * in any affected category must be supported (set in enabled_mask),
 735          * or represent a cipher strength value (will be added in any case because algorithms=0).
 736          */
 737         for (i = 0; i < num_of_group_aliases; i++)
 738                 {
 739                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
 740                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
 741                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
 742                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
 743                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
 744
 745                 if (algorithm_mkey)
 746                         if ((algorithm_mkey & mask_mkey) == 0)
 747                                 continue;
 748
 749                 if (algorithm_auth)
 750                         if ((algorithm_auth & mask_auth) == 0)
 751                                 continue;
 752
 753                 if (algorithm_enc)
 754                         if ((algorithm_enc & mask_enc) == 0)
 755                                 continue;
 756
 757                 if (algorithm_mac)
 758                         if ((algorithm_mac & mask_mac) == 0)
 759                                 continue;
 760
 761                 if (algorithm_ssl)
 762                         if ((algorithm_ssl & mask_ssl) == 0)
 763                                 continue;
 764
 765                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
 766                 ca_curr++;
 767                 }
 768
 769         *ca_curr = NULL;        /* end of list */
 770         }
 771
 772 static void ssl_cipher_apply_rule(unsigned long cipher_id,
 773                 unsigned long alg_mkey, unsigned long alg_auth,
 774                 unsigned long alg_enc, unsigned long alg_mac,
 775                 unsigned long alg_ssl,
 776                 unsigned long algo_strength,
 777                 int rule, int strength_bits,
 778                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
 779         {
 780         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
 781         SSL_CIPHER *cp;
 782         int reverse = 0;
 783
 784 #ifdef CIPHER_DEBUG
 785         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
 786                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
 787 #endif
 788
 789         if (rule == CIPHER_DEL)
 790                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
 791
 792         head = *head_p;
 793         tail = *tail_p;
 794
 795         if (reverse)
 796                 {
 797                 curr = tail;
 798                 last = head;
 799                 }
 800         else
 801                 {
 802                 curr = head;
 803                 last = tail;
 804                 }
 805
 806         curr2 = curr;
 807         for (;;)
 808                 {
 809                 if ((curr == NULL) || (curr == last)) break;
 810                 curr = curr2;
 811                 curr2 = reverse ? curr->prev : curr->next;
 812
 813                 cp = curr->cipher;
 814
 815                 /*
 816                  * Selection criteria is either the value of strength_bits
 817                  * or the algorithms used.
 818                  */
 819                 if (strength_bits >= 0)
 820                         {
 821                         if (strength_bits != cp->strength_bits)
 822                                 continue;
 823                         }
 824                 else
 825                         {
 826 #ifdef CIPHER_DEBUG
 827                         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);
 828 #endif
 829
 830                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
 831                                 continue;
 832                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
 833                                 continue;
 834                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
 835                                 continue;
 836                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
 837                                 continue;
 838                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
 839                                 continue;
 840                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
 841                                 continue;
 842                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
 843                                 continue;
 844                         }
 845
 846 #ifdef CIPHER_DEBUG
 847                 printf("Action = %d\n", rule);
 848 #endif
 849
 850                 /* add the cipher if it has not been added yet. */
 851                 if (rule == CIPHER_ADD)
 852                         {
 853                         /* reverse == 0 */
 854                         if (!curr->active)
 855                                 {
 856                                 ll_append_tail(&head, curr, &tail);
 857                                 curr->active = 1;
 858                                 }
 859                         }
 860                 /* Move the added cipher to this location */
 861                 else if (rule == CIPHER_ORD)
 862                         {
 863                         /* reverse == 0 */
 864                         if (curr->active)
 865                                 {
 866                                 ll_append_tail(&head, curr, &tail);
 867                                 }
 868                         }
 869                 else if (rule == CIPHER_DEL)
 870                         {
 871                         /* reverse == 1 */
 872                         if (curr->active)
 873                                 {
 874                                 /* most recently deleted ciphersuites get best positions
 875                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
 876                                  * works in reverse to maintain the order) */
 877                                 ll_append_head(&head, curr, &tail);
 878                                 curr->active = 0;
 879                                 }
 880                         }
 881                 else if (rule == CIPHER_KILL)
 882                         {
 883                         /* reverse == 0 */
 884                         if (head == curr)
 885                                 head = curr->next;
 886                         else
 887                                 curr->prev->next = curr->next;
 888                         if (tail == curr)
 889                                 tail = curr->prev;
 890                         curr->active = 0;
 891                         if (curr->next != NULL)
 892                                 curr->next->prev = curr->prev;
 893                         if (curr->prev != NULL)
 894                                 curr->prev->next = curr->next;
 895                         curr->next = NULL;
 896                         curr->prev = NULL;
 897                         }
 898                 }
 899
 900         *head_p = head;
 901         *tail_p = tail;
 902         }
 903
 904 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
 905                                     CIPHER_ORDER **tail_p)
 906         {
 907         int max_strength_bits, i, *number_uses;
 908         CIPHER_ORDER *curr;
 909
 910         /*
 911          * This routine sorts the ciphers with descending strength. The sorting
 912          * must keep the pre-sorted sequence, so we apply the normal sorting
 913          * routine as '+' movement to the end of the list.
 914          */
 915         max_strength_bits = 0;
 916         curr = *head_p;
 917         while (curr != NULL)
 918                 {
 919                 if (curr->active &&
 920                     (curr->cipher->strength_bits > max_strength_bits))
 921                     max_strength_bits = curr->cipher->strength_bits;
 922                 curr = curr->next;
 923                 }
 924
 925         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
 926         if (!number_uses)
 927                 {
 928                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
 929                 return(0);
 930                 }
 931         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
 932
 933         /*
 934          * Now find the strength_bits values actually used
 935          */
 936         curr = *head_p;
 937         while (curr != NULL)
 938                 {
 939                 if (curr->active)
 940                         number_uses[curr->cipher->strength_bits]++;
 941                 curr = curr->next;
 942                 }
 943         /*
 944          * Go through the list of used strength_bits values in descending
 945          * order.
 946          */
 947         for (i = max_strength_bits; i >= 0; i--)
 948                 if (number_uses[i] > 0)
 949                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
 950
 951         OPENSSL_free(number_uses);
 952         return(1);
 953         }
 954
 955 static int ssl_cipher_process_rulestr(const char *rule_str,
 956                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
 957                 SSL_CIPHER **ca_list)
 958         {
 959         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
 960         const char *l, *start, *buf;
 961         int j, multi, found, rule, retval, ok, buflen;
 962         unsigned long cipher_id = 0;
 963         char ch;
 964
 965         retval = 1;
 966         l = rule_str;
 967         for (;;)
 968                 {
 969                 ch = *l;
 970
 971                 if (ch == '\0')
 972                         break;          /* done */
 973                 if (ch == '-')
 974                         { rule = CIPHER_DEL; l++; }
 975                 else if (ch == '+')
 976                         { rule = CIPHER_ORD; l++; }
 977                 else if (ch == '!')
 978                         { rule = CIPHER_KILL; l++; }
 979                 else if (ch == '@')
 980                         { rule = CIPHER_SPECIAL; l++; }
 981                 else
 982                         { rule = CIPHER_ADD; }
 983
 984                 if (ITEM_SEP(ch))
 985                         {
 986                         l++;
 987                         continue;
 988                         }
 989
 990                 alg_mkey = 0;
 991                 alg_auth = 0;
 992                 alg_enc = 0;
 993                 alg_mac = 0;
 994                 alg_ssl = 0;
 995                 algo_strength = 0;
 996
 997                 start=l;
 998                 for (;;)
 999                         {
1000                         ch = *l;
1001                         buf = l;
1002                         buflen = 0;
1003 #ifndef CHARSET_EBCDIC
1004                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1005                                 ((ch >= '0') && (ch <= '9')) ||
1006                                 ((ch >= 'a') && (ch <= 'z')) ||
1007                                  (ch == '-'))
1008 #else
1009                         while ( isalnum(ch) || (ch == '-'))
1010 #endif
1011                                  {
1012                                  ch = *(++l);
1013                                  buflen++;
1014                                  }
1015
1016                         if (buflen == 0)
1017                                 {
1018                                 /*
1019                                  * We hit something we cannot deal with,
1020                                  * it is no command or separator nor
1021                                  * alphanumeric, so we call this an error.
1022                                  */
1023                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1024                                        SSL_R_INVALID_COMMAND);
1025                                 retval = found = 0;
1026                                 l++;
1027                                 break;
1028                                 }
1029
1030                         if (rule == CIPHER_SPECIAL)
1031                                 {
1032                                 found = 0; /* unused -- avoid compiler warning */
1033                                 break;  /* special treatment */
1034                                 }
1035
1036                         /* check for multi-part specification */
1037                         if (ch == '+')
1038                                 {
1039                                 multi=1;
1040                                 l++;
1041                                 }
1042                         else
1043                                 multi=0;
1044
1045                         /*
1046                          * Now search for the cipher alias in the ca_list. Be careful
1047                          * with the strncmp, because the "buflen" limitation
1048                          * will make the rule "ADH:SOME" and the cipher
1049                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1050                          * So additionally check whether the cipher name found
1051                          * has the correct length. We can save a strlen() call:
1052                          * just checking for the '\0' at the right place is
1053                          * sufficient, we have to strncmp() anyway. (We cannot
1054                          * use strcmp(), because buf is not '\0' terminated.)
1055                          */
1056                         j = found = 0;
1057                         cipher_id = 0;
1058                         while (ca_list[j])
1059                                 {
1060                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1061                                     (ca_list[j]->name[buflen] == '\0'))
1062                                         {
1063                                         found = 1;
1064                                         break;
1065                                         }
1066                                 else
1067                                         j++;
1068                                 }
1069
1070                         if (!found)
1071                                 break;  /* ignore this entry */
1072
1073                         if (ca_list[j]->algorithm_mkey)
1074                                 {
1075                                 if (alg_mkey)
1076                                         {
1077                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1078                                         if (!alg_mkey) { found = 0; break; }
1079                                         }
1080                                 else
1081                                         alg_mkey = ca_list[j]->algorithm_mkey;
1082                                 }
1083
1084                         if (ca_list[j]->algorithm_auth)
1085                                 {
1086                                 if (alg_auth)
1087                                         {
1088                                         alg_auth &= ca_list[j]->algorithm_auth;
1089                                         if (!alg_auth) { found = 0; break; }
1090                                         }
1091                                 else
1092                                         alg_auth = ca_list[j]->algorithm_auth;
1093                                 }
1094
1095                         if (ca_list[j]->algorithm_enc)
1096                                 {
1097                                 if (alg_enc)
1098                                         {
1099                                         alg_enc &= ca_list[j]->algorithm_enc;
1100                                         if (!alg_enc) { found = 0; break; }
1101                                         }
1102                                 else
1103                                         alg_enc = ca_list[j]->algorithm_enc;
1104                                 }
1105
1106                         if (ca_list[j]->algorithm_mac)
1107                                 {
1108                                 if (alg_mac)
1109                                         {
1110                                         alg_mac &= ca_list[j]->algorithm_mac;
1111                                         if (!alg_mac) { found = 0; break; }
1112                                         }
1113                                 else
1114                                         alg_mac = ca_list[j]->algorithm_mac;
1115                                 }
1116
1117                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1118                                 {
1119                                 if (algo_strength & SSL_EXP_MASK)
1120                                         {
1121                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1122                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1123                                         }
1124                                 else
1125                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1126                                 }
1127
1128                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1129                                 {
1130                                 if (algo_strength & SSL_STRONG_MASK)
1131                                         {
1132                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1133                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1134                                         }
1135                                 else
1136                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1137                                 }
1138
1139                         if (ca_list[j]->valid)
1140                                 {
1141                                 /* explicit ciphersuite found; its protocol version
1142                                  * does not become part of the search pattern!*/
1143
1144                                 cipher_id = ca_list[j]->id;
1145                                 }
1146                         else
1147                                 {
1148                                 /* not an explicit ciphersuite; only in this case, the
1149                                  * protocol version is considered part of the search pattern */
1150
1151                                 if (ca_list[j]->algorithm_ssl)
1152                                         {
1153                                         if (alg_ssl)
1154                                                 {
1155                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1156                                                 if (!alg_ssl) { found = 0; break; }
1157                                                 }
1158                                         else
1159                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1160                                         }
1161                                 }
1162
1163                         if (!multi) break;
1164                         }
1165
1166                 /*
1167                  * Ok, we have the rule, now apply it
1168                  */
1169                 if (rule == CIPHER_SPECIAL)
1170                         {       /* special command */
1171                         ok = 0;
1172                         if ((buflen == 8) &&
1173                                 !strncmp(buf, "STRENGTH", 8))
1174                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1175                         else
1176                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1177                                         SSL_R_INVALID_COMMAND);
1178                         if (ok == 0)
1179                                 retval = 0;
1180                         /*
1181                          * We do not support any "multi" options
1182                          * together with "@", so throw away the
1183                          * rest of the command, if any left, until
1184                          * end or ':' is found.
1185                          */
1186                         while ((*l != '\0') && !ITEM_SEP(*l))
1187                                 l++;
1188                         }
1189                 else if (found)
1190                         {
1191                         ssl_cipher_apply_rule(cipher_id,
1192                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1193                                 rule, -1, head_p, tail_p);
1194                         }
1195                 else
1196                         {
1197                         while ((*l != '\0') && !ITEM_SEP(*l))
1198                                 l++;
1199                         }
1200                 if (*l == '\0') break; /* done */
1201                 }
1202
1203         return(retval);
1204         }
1205
1206 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1207                 STACK_OF(SSL_CIPHER) **cipher_list,
1208                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1209                 const char *rule_str)
1210         {
1211         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1212         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1213         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1214         const char *rule_p;
1215         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1216         SSL_CIPHER **ca_list = NULL;
1217
1218         /*
1219          * Return with error if nothing to do.
1220          */
1221         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1222                 return NULL;
1223
1224         /*
1225          * To reduce the work to do we only want to process the compiled
1226          * in algorithms, so we first get the mask of disabled ciphers.
1227          */
1228         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1229
1230         /*
1231          * Now we have to collect the available ciphers from the compiled
1232          * in ciphers. We cannot get more than the number compiled in, so
1233          * it is used for allocation.
1234          */
1235         num_of_ciphers = ssl_method->num_ciphers();
1236 #ifdef KSSL_DEBUG
1237         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1238 #endif    /* KSSL_DEBUG */
1239         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1240         if (co_list == NULL)
1241                 {
1242                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1243                 return(NULL);   /* Failure */
1244                 }
1245
1246         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1247                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1248                                    co_list, &head, &tail);
1249
1250
1251         /* Now arrange all ciphers by preference: */
1252
1253         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1254         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1255         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1256
1257         /* AES is our preferred symmetric cipher */
1258         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1259
1260         /* Temporarily enable everything else for sorting */
1261         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1262
1263         /* Low priority for MD5 */
1264         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1265
1266         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1267          * (For applications that allow them, they aren't too bad, but we prefer
1268          * authenticated ciphers.) */
1269         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1270
1271         /* Move ciphers without forward secrecy to the end */
1272         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1273         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1274         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1275         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1276         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1277
1278         /* RC4 is sort-of broken -- move the the end */
1279         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1280
1281         /* Now sort by symmetric encryption strength.  The above ordering remains
1282          * in force within each class */
1283         if (!ssl_cipher_strength_sort(&head, &tail))
1284                 {
1285                 OPENSSL_free(co_list);
1286                 return NULL;
1287                 }
1288
1289         /* Now disable everything (maintaining the ordering!) */
1290         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1291
1292
1293         /*
1294          * We also need cipher aliases for selecting based on the rule_str.
1295          * There might be two types of entries in the rule_str: 1) names
1296          * of ciphers themselves 2) aliases for groups of ciphers.
1297          * For 1) we need the available ciphers and for 2) the cipher
1298          * groups of cipher_aliases added together in one list (otherwise
1299          * we would be happy with just the cipher_aliases table).
1300          */
1301         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1302         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1303         ca_list =
1304                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1305         if (ca_list == NULL)
1306                 {
1307                 OPENSSL_free(co_list);
1308                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1309                 return(NULL);   /* Failure */
1310                 }
1311         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1312                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1313                                    head);
1314
1315         /*
1316          * If the rule_string begins with DEFAULT, apply the default rule
1317          * before using the (possibly available) additional rules.
1318          */
1319         ok = 1;
1320         rule_p = rule_str;
1321         if (strncmp(rule_str,"DEFAULT",7) == 0)
1322                 {
1323                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1324                         &head, &tail, ca_list);
1325                 rule_p += 7;
1326                 if (*rule_p == ':')
1327                         rule_p++;
1328                 }
1329
1330         if (ok && (strlen(rule_p) > 0))
1331                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1332
1333         OPENSSL_free(ca_list);  /* Not needed anymore */
1334
1335         if (!ok)
1336                 {       /* Rule processing failure */
1337                 OPENSSL_free(co_list);
1338                 return(NULL);
1339                 }
1340
1341         /*
1342          * Allocate new "cipherstack" for the result, return with error
1343          * if we cannot get one.
1344          */
1345         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1346                 {
1347                 OPENSSL_free(co_list);
1348                 return(NULL);
1349                 }
1350
1351         /*
1352          * The cipher selection for the list is done. The ciphers are added
1353          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1354          */
1355         for (curr = head; curr != NULL; curr = curr->next)
1356                 {
1357                 if (curr->active)
1358                         {
1359                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1360 #ifdef CIPHER_DEBUG
1361                         printf("<%s>\n",curr->cipher->name);
1362 #endif
1363                         }
1364                 }
1365         OPENSSL_free(co_list);  /* Not needed any longer */
1366
1367         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1368         if (tmp_cipher_list == NULL)
1369                 {
1370                 sk_SSL_CIPHER_free(cipherstack);
1371                 return NULL;
1372                 }
1373         if (*cipher_list != NULL)
1374                 sk_SSL_CIPHER_free(*cipher_list);
1375         *cipher_list = cipherstack;
1376         if (*cipher_list_by_id != NULL)
1377                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1378         *cipher_list_by_id = tmp_cipher_list;
1379         sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1380
1381         return(cipherstack);
1382         }
1383
1384 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1385         {
1386         int is_export,pkl,kl;
1387         const char *ver,*exp_str;
1388         const char *kx,*au,*enc,*mac;
1389         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1390 #ifdef KSSL_DEBUG
1391         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1392 #else
1393         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1394 #endif /* KSSL_DEBUG */
1395
1396         alg_mkey = cipher->algorithm_mkey;
1397         alg_auth = cipher->algorithm_auth;
1398         alg_enc = cipher->algorithm_enc;
1399         alg_mac = cipher->algorithm_mac;
1400         alg_ssl = cipher->algorithm_ssl;
1401
1402         alg_s=cipher->algo_strength;
1403         alg2=cipher->algorithm2;
1404
1405         is_export=SSL_C_IS_EXPORT(cipher);
1406         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1407         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1408         exp_str=is_export?" export":"";
1409
1410         if (alg_ssl & SSL_SSLV2)
1411                 ver="SSLv2";
1412         else if (alg_ssl & SSL_SSLV3)
1413                 ver="SSLv3";
1414         else
1415                 ver="unknown";
1416
1417         switch (alg_mkey)
1418                 {
1419         case SSL_kRSA:
1420                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1421                 break;
1422         case SSL_kDHr:
1423                 kx="DH/RSA";
1424                 break;
1425         case SSL_kDHd:
1426                 kx="DH/DSS";
1427                 break;
1428         case SSL_kKRB5:
1429                 kx="KRB5";
1430                 break;
1431         case SSL_kEDH:
1432                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1433                 break;
1434         case SSL_kECDHr:
1435                 kx="ECDH/RSA";
1436                 break;
1437         case SSL_kECDHe:
1438                 kx="ECDH/ECDSA";
1439                 break;
1440         case SSL_kEECDH:
1441                 kx="ECDH";
1442                 break;
1443         case SSL_kPSK:
1444                 kx="PSK";
1445                 break;
1446         default:
1447                 kx="unknown";
1448                 }
1449
1450         switch (alg_auth)
1451                 {
1452         case SSL_aRSA:
1453                 au="RSA";
1454                 break;
1455         case SSL_aDSS:
1456                 au="DSS";
1457                 break;
1458         case SSL_aDH:
1459                 au="DH";
1460                 break;
1461         case SSL_aKRB5:
1462                 au="KRB5";
1463                 break;
1464         case SSL_aECDH:
1465                 au="ECDH";
1466                 break;
1467         case SSL_aNULL:
1468                 au="None";
1469                 break;
1470         case SSL_aECDSA:
1471                 au="ECDSA";
1472                 break;
1473         case SSL_aPSK:
1474                 au="PSK";
1475                 break;
1476         default:
1477                 au="unknown";
1478                 break;
1479                 }
1480
1481         switch (alg_enc)
1482                 {
1483         case SSL_DES:
1484                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1485                 break;
1486         case SSL_3DES:
1487                 enc="3DES(168)";
1488                 break;
1489         case SSL_RC4:
1490                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1491                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1492                 break;
1493         case SSL_RC2:
1494                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1495                 break;
1496         case SSL_IDEA:
1497                 enc="IDEA(128)";
1498                 break;
1499         case SSL_eNULL:
1500                 enc="None";
1501                 break;
1502         case SSL_AES128:
1503                 enc="AES(128)";
1504                 break;
1505         case SSL_AES256:
1506                 enc="AES(256)";
1507                 break;
1508         case SSL_CAMELLIA128:
1509                 enc="Camellia(128)";
1510                 break;
1511         case SSL_CAMELLIA256:
1512                 enc="Camellia(256)";
1513                 break;
1514         case SSL_SEED:
1515                 enc="SEED(128)";
1516                 break;
1517         default:
1518                 enc="unknown";
1519                 break;
1520                 }
1521
1522         switch (alg_mac)
1523                 {
1524         case SSL_MD5:
1525                 mac="MD5";
1526                 break;
1527         case SSL_SHA1:
1528                 mac="SHA1";
1529                 break;
1530         default:
1531                 mac="unknown";
1532                 break;
1533                 }
1534
1535         if (buf == NULL)
1536                 {
1537                 len=128;
1538                 buf=OPENSSL_malloc(len);
1539                 if (buf == NULL) return("OPENSSL_malloc Error");
1540                 }
1541         else if (len < 128)
1542                 return("Buffer too small");
1543
1544 #ifdef KSSL_DEBUG
1545         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1546 #else
1547         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1548 #endif /* KSSL_DEBUG */
1549         return(buf);
1550         }
1551
1552 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1553         {
1554         int i;
1555
1556         if (c == NULL) return("(NONE)");
1557         i=(int)(c->id>>24L);
1558         if (i == 3)
1559                 return("TLSv1/SSLv3");
1560         else if (i == 2)
1561                 return("SSLv2");
1562         else
1563                 return("unknown");
1564         }
1565
1566 /* return the actual cipher being used */
1567 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1568         {
1569         if (c != NULL)
1570                 return(c->name);
1571         return("(NONE)");
1572         }
1573
1574 /* number of bits for symmetric cipher */
1575 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1576         {
1577         int ret=0;
1578
1579         if (c != NULL)
1580                 {
1581                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1582                 ret = c->strength_bits;
1583                 }
1584         return(ret);
1585         }
1586
1587 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1588         {
1589         SSL_COMP *ctmp;
1590         int i,nn;
1591
1592         if ((n == 0) || (sk == NULL)) return(NULL);
1593         nn=sk_SSL_COMP_num(sk);
1594         for (i=0; i<nn; i++)
1595                 {
1596                 ctmp=sk_SSL_COMP_value(sk,i);
1597                 if (ctmp->id == n)
1598                         return(ctmp);
1599                 }
1600         return(NULL);
1601         }
1602
1603 #ifdef OPENSSL_NO_COMP
1604 void *SSL_COMP_get_compression_methods(void)
1605         {
1606         return NULL;
1607         }
1608 int SSL_COMP_add_compression_method(int id, void *cm)
1609         {
1610         return 1;
1611         }
1612
1613 const char *SSL_COMP_get_name(const void *comp)
1614         {
1615         return NULL;
1616         }
1617 #else
1618 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1619         {
1620         load_builtin_compressions();
1621         return(ssl_comp_methods);
1622         }
1623
1624 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1625         {
1626         SSL_COMP *comp;
1627
1628         if (cm == NULL || cm->type == NID_undef)
1629                 return 1;
1630
1631         /* According to draft-ietf-tls-compression-04.txt, the
1632            compression number ranges should be the following:
1633
1634            0 to 63:    methods defined by the IETF
1635            64 to 192:  external party methods assigned by IANA
1636            193 to 255: reserved for private use */
1637         if (id < 193 || id > 255)
1638                 {
1639                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1640                 return 0;
1641                 }
1642
1643         MemCheck_off();
1644         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1645         comp->id=id;
1646         comp->method=cm;
1647         load_builtin_compressions();
1648         if (ssl_comp_methods
1649                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1650                 {
1651                 OPENSSL_free(comp);
1652                 MemCheck_on();
1653                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1654                 return(1);
1655                 }
1656         else if ((ssl_comp_methods == NULL)
1657                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1658                 {
1659                 OPENSSL_free(comp);
1660                 MemCheck_on();
1661                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1662                 return(1);
1663                 }
1664         else
1665                 {
1666                 MemCheck_on();
1667                 return(0);
1668                 }
1669         }
1670
1671 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1672         {
1673         if (comp)
1674                 return comp->name;
1675         return NULL;
1676         }
1677
1678 #endif