1 /* ssl/ssl_asn1.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 #include <stdio.h> 60 #include <stdlib.h> 61 #include <openssl/asn1_mac.h> 62 #include <openssl/objects.h> 63 #include <openssl/x509.h> 64 #include "ssl_locl.h" 65 #include "cryptlib.h" 66 67 typedef struct ssl_session_asn1_st 68 { 69 ASN1_INTEGER version; 70 ASN1_INTEGER ssl_version; 71 ASN1_OCTET_STRING cipher; 72 ASN1_OCTET_STRING master_key; 73 ASN1_OCTET_STRING session_id; 74 ASN1_OCTET_STRING session_id_context; 75 ASN1_OCTET_STRING key_arg; 76 ASN1_INTEGER time; 77 ASN1_INTEGER timeout; 78 ASN1_INTEGER verify_result; 79 } SSL_SESSION_ASN1; 80 81 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 82 { 83 #define LSIZE2 (sizeof(long)*2) 84 int v1=0,v2=0,v3=0,v4=0,v5=0; 85 unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2]; 86 unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2]; 87 long l; 88 SSL_SESSION_ASN1 a; 89 M_ASN1_I2D_vars(in); 90 91 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 92 return(0); 93 94 /* Note that I cheat in the following 2 assignments. I know 95 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set 96 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed. 97 * This is a bit evil but makes things simple, no dynamic allocation 98 * to clean up :-) */ 99 a.version.length=LSIZE2; 100 a.version.type=V_ASN1_INTEGER; 101 a.version.data=ibuf1; 102 ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION); 103 104 a.ssl_version.length=LSIZE2; 105 a.ssl_version.type=V_ASN1_INTEGER; 106 a.ssl_version.data=ibuf2; 107 ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version); 108 109 a.cipher.type=V_ASN1_OCTET_STRING; 110 a.cipher.data=buf; 111 112 if (in->cipher == NULL) 113 l=in->cipher_id; 114 else 115 l=in->cipher->id; 116 if (in->ssl_version == SSL2_VERSION) 117 { 118 a.cipher.length=3; 119 buf[0]=((unsigned char)(l>>16L))&0xff; 120 buf[1]=((unsigned char)(l>> 8L))&0xff; 121 buf[2]=((unsigned char)(l ))&0xff; 122 } 123 else 124 { 125 a.cipher.length=2; 126 buf[0]=((unsigned char)(l>>8L))&0xff; 127 buf[1]=((unsigned char)(l ))&0xff; 128 } 129 130 a.master_key.length=in->master_key_length; 131 a.master_key.type=V_ASN1_OCTET_STRING; 132 a.master_key.data=in->master_key; 133 134 a.session_id.length=in->session_id_length; 135 a.session_id.type=V_ASN1_OCTET_STRING; 136 a.session_id.data=in->session_id; 137 138 a.session_id_context.length=in->sid_ctx_length; 139 a.session_id_context.type=V_ASN1_OCTET_STRING; 140 a.session_id_context.data=in->sid_ctx; 141 142 a.key_arg.length=in->key_arg_length; 143 a.key_arg.type=V_ASN1_OCTET_STRING; 144 a.key_arg.data=in->key_arg; 145 146 if (in->time != 0L) 147 { 148 a.time.length=LSIZE2; 149 a.time.type=V_ASN1_INTEGER; 150 a.time.data=ibuf3; 151 ASN1_INTEGER_set(&(a.time),in->time); 152 } 153 154 if (in->timeout != 0L) 155 { 156 a.timeout.length=LSIZE2; 157 a.timeout.type=V_ASN1_INTEGER; 158 a.timeout.data=ibuf4; 159 ASN1_INTEGER_set(&(a.timeout),in->timeout); 160 } 161 162 if (in->verify_result != X509_V_OK) 163 { 164 a.verify_result.length=LSIZE2; 165 a.verify_result.type=V_ASN1_INTEGER; 166 a.verify_result.data=ibuf5; 167 ASN1_INTEGER_set(&a.verify_result,in->verify_result); 168 } 169 170 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 171 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 172 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 173 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 174 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 175 if (in->key_arg_length > 0) 176 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING); 177 if (in->time != 0L) 178 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 179 if (in->timeout != 0L) 180 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 181 if (in->peer != NULL) 182 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3); 183 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4); 184 if (in->verify_result != X509_V_OK) 185 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5); 186 187 M_ASN1_I2D_seq_total(); 188 189 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 190 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 191 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 192 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 193 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 194 if (in->key_arg_length > 0) 195 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0); 196 if (in->time != 0L) 197 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 198 if (in->timeout != 0L) 199 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 200 if (in->peer != NULL) 201 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3); 202 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4, 203 v4); 204 if (in->verify_result != X509_V_OK) 205 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5); 206 M_ASN1_I2D_finish(); 207 } 208 209 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp, 210 long length) 211 { 212 int version,ssl_version=0,i; 213 long id; 214 ASN1_INTEGER ai,*aip; 215 ASN1_OCTET_STRING os,*osp; 216 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new); 217 218 aip= &ai; 219 osp= &os; 220 221 M_ASN1_D2I_Init(); 222 M_ASN1_D2I_start_sequence(); 223 224 ai.data=NULL; ai.length=0; 225 M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER); 226 version=(int)ASN1_INTEGER_get(aip); 227 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 228 229 /* we don't care about the version right now :-) */ 230 M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER); 231 ssl_version=(int)ASN1_INTEGER_get(aip); 232 ret->ssl_version=ssl_version; 233 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 234 235 os.data=NULL; os.length=0; 236 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 237 if (ssl_version == SSL2_VERSION) 238 { 239 if (os.length != 3) 240 { 241 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 242 goto err; 243 } 244 id=0x02000000L| 245 ((unsigned long)os.data[0]<<16L)| 246 ((unsigned long)os.data[1]<< 8L)| 247 (unsigned long)os.data[2]; 248 } 249 else if ((ssl_version>>8) == 3) 250 { 251 if (os.length != 2) 252 { 253 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 254 goto err; 255 } 256 id=0x03000000L| 257 ((unsigned long)os.data[0]<<8L)| 258 (unsigned long)os.data[1]; 259 } 260 else 261 { 262 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION); 263 return(NULL); 264 } 265 266 ret->cipher=NULL; 267 ret->cipher_id=id; 268 269 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 270 if ((ssl_version>>8) == SSL3_VERSION) 271 i=SSL3_MAX_SSL_SESSION_ID_LENGTH; 272 else /* if (ssl_version == SSL2_VERSION) */ 273 i=SSL2_MAX_SSL_SESSION_ID_LENGTH; 274 275 if (os.length > i) 276 os.length = i; 277 if (os.length > sizeof ret->session_id) /* can't happen */ 278 os.length = sizeof ret->session_id; 279 280 ret->session_id_length=os.length; 281 memcpy(ret->session_id,os.data,os.length); 282 283 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 284 if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH) 285 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; 286 else 287 ret->master_key_length=os.length; 288 memcpy(ret->master_key,os.data,ret->master_key_length); 289 290 os.length=0; 291 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING); 292 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 293 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH; 294 else 295 ret->key_arg_length=os.length; 296 memcpy(ret->key_arg,os.data,ret->key_arg_length); 297 if (os.data != NULL) OPENSSL_free(os.data); 298 299 ai.length=0; 300 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1); 301 if (ai.data != NULL) 302 { 303 ret->time=ASN1_INTEGER_get(aip); 304 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 305 } 306 else 307 ret->time=time(NULL); 308 309 ai.length=0; 310 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2); 311 if (ai.data != NULL) 312 { 313 ret->timeout=ASN1_INTEGER_get(aip); 314 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 315 } 316 else 317 ret->timeout=3; 318 319 if (ret->peer != NULL) 320 { 321 X509_free(ret->peer); 322 ret->peer=NULL; 323 } 324 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3); 325 326 os.length=0; 327 os.data=NULL; 328 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4); 329 330 if(os.data != NULL) 331 { 332 if (os.length > SSL_MAX_SID_CTX_LENGTH) 333 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH); 334 ret->sid_ctx_length=os.length; 335 memcpy(ret->sid_ctx,os.data,os.length); 336 OPENSSL_free(os.data); os.data=NULL; os.length=0; 337 } 338 else 339 ret->sid_ctx_length=0; 340 341 ai.length=0; 342 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5); 343 if (ai.data != NULL) 344 { 345 ret->verify_result=ASN1_INTEGER_get(aip); 346 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 347 } 348 else 349 ret->verify_result=X509_V_OK; 350 351 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION); 352 } 353