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 "ssl_locl.h" 62 #include <openssl/asn1_mac.h> 63 #include <openssl/objects.h> 64 #include <openssl/x509.h> 65 66 typedef struct ssl_session_asn1_st 67 { 68 ASN1_INTEGER version; 69 ASN1_INTEGER ssl_version; 70 ASN1_OCTET_STRING cipher; 71 ASN1_OCTET_STRING master_key; 72 ASN1_OCTET_STRING session_id; 73 ASN1_OCTET_STRING session_id_context; 74 ASN1_OCTET_STRING key_arg; 75 #ifndef OPENSSL_NO_KRB5 76 ASN1_OCTET_STRING krb5_princ; 77 #endif /* OPENSSL_NO_KRB5 */ 78 ASN1_INTEGER time; 79 ASN1_INTEGER timeout; 80 ASN1_INTEGER verify_result; 81 } SSL_SESSION_ASN1; 82 83 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 84 { 85 #define LSIZE2 (sizeof(long)*2) 86 int v1=0,v2=0,v3=0,v4=0,v5=0; 87 unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2]; 88 unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2]; 89 long l; 90 SSL_SESSION_ASN1 a; 91 M_ASN1_I2D_vars(in); 92 93 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 94 return(0); 95 96 /* Note that I cheat in the following 2 assignments. I know 97 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set 98 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed. 99 * This is a bit evil but makes things simple, no dynamic allocation 100 * to clean up :-) */ 101 a.version.length=LSIZE2; 102 a.version.type=V_ASN1_INTEGER; 103 a.version.data=ibuf1; 104 ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION); 105 106 a.ssl_version.length=LSIZE2; 107 a.ssl_version.type=V_ASN1_INTEGER; 108 a.ssl_version.data=ibuf2; 109 ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version); 110 111 a.cipher.type=V_ASN1_OCTET_STRING; 112 a.cipher.data=buf; 113 114 if (in->cipher == NULL) 115 l=in->cipher_id; 116 else 117 l=in->cipher->id; 118 if (in->ssl_version == SSL2_VERSION) 119 { 120 a.cipher.length=3; 121 buf[0]=((unsigned char)(l>>16L))&0xff; 122 buf[1]=((unsigned char)(l>> 8L))&0xff; 123 buf[2]=((unsigned char)(l ))&0xff; 124 } 125 else 126 { 127 a.cipher.length=2; 128 buf[0]=((unsigned char)(l>>8L))&0xff; 129 buf[1]=((unsigned char)(l ))&0xff; 130 } 131 132 a.master_key.length=in->master_key_length; 133 a.master_key.type=V_ASN1_OCTET_STRING; 134 a.master_key.data=in->master_key; 135 136 a.session_id.length=in->session_id_length; 137 a.session_id.type=V_ASN1_OCTET_STRING; 138 a.session_id.data=in->session_id; 139 140 a.session_id_context.length=in->sid_ctx_length; 141 a.session_id_context.type=V_ASN1_OCTET_STRING; 142 a.session_id_context.data=in->sid_ctx; 143 144 a.key_arg.length=in->key_arg_length; 145 a.key_arg.type=V_ASN1_OCTET_STRING; 146 a.key_arg.data=in->key_arg; 147 148 #ifndef OPENSSL_NO_KRB5 149 if (in->krb5_client_princ_len) 150 { 151 a.krb5_princ.length=in->krb5_client_princ_len; 152 a.krb5_princ.type=V_ASN1_OCTET_STRING; 153 a.krb5_princ.data=in->krb5_client_princ; 154 } 155 #endif /* OPENSSL_NO_KRB5 */ 156 157 if (in->time != 0L) 158 { 159 a.time.length=LSIZE2; 160 a.time.type=V_ASN1_INTEGER; 161 a.time.data=ibuf3; 162 ASN1_INTEGER_set(&(a.time),in->time); 163 } 164 165 if (in->timeout != 0L) 166 { 167 a.timeout.length=LSIZE2; 168 a.timeout.type=V_ASN1_INTEGER; 169 a.timeout.data=ibuf4; 170 ASN1_INTEGER_set(&(a.timeout),in->timeout); 171 } 172 173 if (in->verify_result != X509_V_OK) 174 { 175 a.verify_result.length=LSIZE2; 176 a.verify_result.type=V_ASN1_INTEGER; 177 a.verify_result.data=ibuf5; 178 ASN1_INTEGER_set(&a.verify_result,in->verify_result); 179 } 180 181 182 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 183 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 184 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 185 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 186 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 187 #ifndef OPENSSL_NO_KRB5 188 if (in->krb5_client_princ_len) 189 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 190 #endif /* OPENSSL_NO_KRB5 */ 191 if (in->key_arg_length > 0) 192 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING); 193 if (in->time != 0L) 194 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 195 if (in->timeout != 0L) 196 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 197 if (in->peer != NULL) 198 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3); 199 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4); 200 if (in->verify_result != X509_V_OK) 201 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5); 202 203 M_ASN1_I2D_seq_total(); 204 205 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 206 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 207 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 208 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 209 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 210 #ifndef OPENSSL_NO_KRB5 211 if (in->krb5_client_princ_len) 212 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 213 #endif /* OPENSSL_NO_KRB5 */ 214 if (in->key_arg_length > 0) 215 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0); 216 if (in->time != 0L) 217 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 218 if (in->timeout != 0L) 219 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 220 if (in->peer != NULL) 221 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3); 222 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4, 223 v4); 224 if (in->verify_result != X509_V_OK) 225 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5); 226 M_ASN1_I2D_finish(); 227 } 228 229 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, 230 long length) 231 { 232 int version,ssl_version=0,i; 233 long id; 234 ASN1_INTEGER ai,*aip; 235 ASN1_OCTET_STRING os,*osp; 236 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new); 237 238 aip= &ai; 239 osp= &os; 240 241 M_ASN1_D2I_Init(); 242 M_ASN1_D2I_start_sequence(); 243 244 ai.data=NULL; ai.length=0; 245 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER); 246 version=(int)ASN1_INTEGER_get(aip); 247 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 248 249 /* we don't care about the version right now :-) */ 250 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER); 251 ssl_version=(int)ASN1_INTEGER_get(aip); 252 ret->ssl_version=ssl_version; 253 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 254 255 os.data=NULL; os.length=0; 256 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 257 if (ssl_version == SSL2_VERSION) 258 { 259 if (os.length != 3) 260 { 261 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 262 goto err; 263 } 264 id=0x02000000L| 265 ((unsigned long)os.data[0]<<16L)| 266 ((unsigned long)os.data[1]<< 8L)| 267 (unsigned long)os.data[2]; 268 } 269 else if ((ssl_version>>8) == SSL3_VERSION_MAJOR) 270 { 271 if (os.length != 2) 272 { 273 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 274 goto err; 275 } 276 id=0x03000000L| 277 ((unsigned long)os.data[0]<<8L)| 278 (unsigned long)os.data[1]; 279 } 280 else 281 { 282 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION); 283 return(NULL); 284 } 285 286 ret->cipher=NULL; 287 ret->cipher_id=id; 288 289 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 290 if ((ssl_version>>8) == SSL3_VERSION_MAJOR) 291 i=SSL3_MAX_SSL_SESSION_ID_LENGTH; 292 else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */ 293 i=SSL2_MAX_SSL_SESSION_ID_LENGTH; 294 295 if (os.length > i) 296 os.length = i; 297 if (os.length > (int)sizeof(ret->session_id)) /* can't happen */ 298 os.length = sizeof(ret->session_id); 299 300 ret->session_id_length=os.length; 301 OPENSSL_assert(os.length <= (int)sizeof(ret->session_id)); 302 memcpy(ret->session_id,os.data,os.length); 303 304 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 305 if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH) 306 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; 307 else 308 ret->master_key_length=os.length; 309 memcpy(ret->master_key,os.data,ret->master_key_length); 310 311 os.length=0; 312 313 #ifndef OPENSSL_NO_KRB5 314 os.length=0; 315 M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING); 316 if (os.data) 317 { 318 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH) 319 ret->krb5_client_princ_len=0; 320 else 321 ret->krb5_client_princ_len=os.length; 322 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len); 323 OPENSSL_free(os.data); 324 os.data = NULL; 325 os.length = 0; 326 } 327 else 328 ret->krb5_client_princ_len=0; 329 #endif /* OPENSSL_NO_KRB5 */ 330 331 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING); 332 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 333 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH; 334 else 335 ret->key_arg_length=os.length; 336 memcpy(ret->key_arg,os.data,ret->key_arg_length); 337 if (os.data != NULL) OPENSSL_free(os.data); 338 339 ai.length=0; 340 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1); 341 if (ai.data != NULL) 342 { 343 ret->time=ASN1_INTEGER_get(aip); 344 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 345 } 346 else 347 ret->time=(unsigned long)time(NULL); 348 349 ai.length=0; 350 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2); 351 if (ai.data != NULL) 352 { 353 ret->timeout=ASN1_INTEGER_get(aip); 354 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 355 } 356 else 357 ret->timeout=3; 358 359 if (ret->peer != NULL) 360 { 361 X509_free(ret->peer); 362 ret->peer=NULL; 363 } 364 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3); 365 366 os.length=0; 367 os.data=NULL; 368 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4); 369 370 if(os.data != NULL) 371 { 372 if (os.length > SSL_MAX_SID_CTX_LENGTH) 373 { 374 ret->sid_ctx_length=os.length; 375 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH); 376 } 377 else 378 { 379 ret->sid_ctx_length=os.length; 380 memcpy(ret->sid_ctx,os.data,os.length); 381 } 382 OPENSSL_free(os.data); os.data=NULL; os.length=0; 383 } 384 else 385 ret->sid_ctx_length=0; 386 387 ai.length=0; 388 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5); 389 if (ai.data != NULL) 390 { 391 ret->verify_result=ASN1_INTEGER_get(aip); 392 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 393 } 394 else 395 ret->verify_result=X509_V_OK; 396 397 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION); 398 } 399