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 #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 #ifndef OPENSSL_NO_KRB5 77 ASN1_OCTET_STRING krb5_princ; 78 #endif /* OPENSSL_NO_KRB5 */ 79 ASN1_INTEGER time; 80 ASN1_INTEGER timeout; 81 ASN1_INTEGER verify_result; 82 } SSL_SESSION_ASN1; 83 84 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 85 { 86 #define LSIZE2 (sizeof(long)*2) 87 int v1=0,v2=0,v3=0,v4=0,v5=0; 88 unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2]; 89 unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2]; 90 long l; 91 SSL_SESSION_ASN1 a; 92 M_ASN1_I2D_vars(in); 93 94 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 95 return(0); 96 97 /* Note that I cheat in the following 2 assignments. I know 98 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set 99 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed. 100 * This is a bit evil but makes things simple, no dynamic allocation 101 * to clean up :-) */ 102 a.version.length=LSIZE2; 103 a.version.type=V_ASN1_INTEGER; 104 a.version.data=ibuf1; 105 ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION); 106 107 a.ssl_version.length=LSIZE2; 108 a.ssl_version.type=V_ASN1_INTEGER; 109 a.ssl_version.data=ibuf2; 110 ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version); 111 112 a.cipher.type=V_ASN1_OCTET_STRING; 113 a.cipher.data=buf; 114 115 if (in->cipher == NULL) 116 l=in->cipher_id; 117 else 118 l=in->cipher->id; 119 if (in->ssl_version == SSL2_VERSION) 120 { 121 a.cipher.length=3; 122 buf[0]=((unsigned char)(l>>16L))&0xff; 123 buf[1]=((unsigned char)(l>> 8L))&0xff; 124 buf[2]=((unsigned char)(l ))&0xff; 125 } 126 else 127 { 128 a.cipher.length=2; 129 buf[0]=((unsigned char)(l>>8L))&0xff; 130 buf[1]=((unsigned char)(l ))&0xff; 131 } 132 133 a.master_key.length=in->master_key_length; 134 a.master_key.type=V_ASN1_OCTET_STRING; 135 a.master_key.data=in->master_key; 136 137 a.session_id.length=in->session_id_length; 138 a.session_id.type=V_ASN1_OCTET_STRING; 139 a.session_id.data=in->session_id; 140 141 a.session_id_context.length=in->sid_ctx_length; 142 a.session_id_context.type=V_ASN1_OCTET_STRING; 143 a.session_id_context.data=in->sid_ctx; 144 145 a.key_arg.length=in->key_arg_length; 146 a.key_arg.type=V_ASN1_OCTET_STRING; 147 a.key_arg.data=in->key_arg; 148 149 #ifndef OPENSSL_NO_KRB5 150 if (in->krb5_client_princ_len) 151 { 152 a.krb5_princ.length=in->krb5_client_princ_len; 153 a.krb5_princ.type=V_ASN1_OCTET_STRING; 154 a.krb5_princ.data=in->krb5_client_princ; 155 } 156 #endif /* OPENSSL_NO_KRB5 */ 157 158 if (in->time != 0L) 159 { 160 a.time.length=LSIZE2; 161 a.time.type=V_ASN1_INTEGER; 162 a.time.data=ibuf3; 163 ASN1_INTEGER_set(&(a.time),in->time); 164 } 165 166 if (in->timeout != 0L) 167 { 168 a.timeout.length=LSIZE2; 169 a.timeout.type=V_ASN1_INTEGER; 170 a.timeout.data=ibuf4; 171 ASN1_INTEGER_set(&(a.timeout),in->timeout); 172 } 173 174 if (in->verify_result != X509_V_OK) 175 { 176 a.verify_result.length=LSIZE2; 177 a.verify_result.type=V_ASN1_INTEGER; 178 a.verify_result.data=ibuf5; 179 ASN1_INTEGER_set(&a.verify_result,in->verify_result); 180 } 181 182 183 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 184 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 185 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 186 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 187 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 188 #ifndef OPENSSL_NO_KRB5 189 if (in->krb5_client_princ_len) 190 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 191 #endif /* OPENSSL_NO_KRB5 */ 192 if (in->key_arg_length > 0) 193 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING); 194 if (in->time != 0L) 195 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 196 if (in->timeout != 0L) 197 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 198 if (in->peer != NULL) 199 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3); 200 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4); 201 if (in->verify_result != X509_V_OK) 202 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5); 203 204 M_ASN1_I2D_seq_total(); 205 206 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 207 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 208 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 209 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 210 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 211 #ifndef OPENSSL_NO_KRB5 212 if (in->krb5_client_princ_len) 213 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 214 #endif /* OPENSSL_NO_KRB5 */ 215 if (in->key_arg_length > 0) 216 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0); 217 if (in->time != 0L) 218 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 219 if (in->timeout != 0L) 220 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 221 if (in->peer != NULL) 222 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3); 223 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4, 224 v4); 225 if (in->verify_result != X509_V_OK) 226 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5); 227 M_ASN1_I2D_finish(); 228 } 229 230 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp, 231 long length) 232 { 233 int version,ssl_version=0,i; 234 long id; 235 ASN1_INTEGER ai,*aip; 236 ASN1_OCTET_STRING os,*osp; 237 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new); 238 239 aip= &ai; 240 osp= &os; 241 242 M_ASN1_D2I_Init(); 243 M_ASN1_D2I_start_sequence(); 244 245 ai.data=NULL; ai.length=0; 246 M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER); 247 version=(int)ASN1_INTEGER_get(aip); 248 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 249 250 /* we don't care about the version right now :-) */ 251 M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER); 252 ssl_version=(int)ASN1_INTEGER_get(aip); 253 ret->ssl_version=ssl_version; 254 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 255 256 os.data=NULL; os.length=0; 257 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 258 if (ssl_version == SSL2_VERSION) 259 { 260 if (os.length != 3) 261 { 262 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 263 goto err; 264 } 265 id=0x02000000L| 266 ((unsigned long)os.data[0]<<16L)| 267 ((unsigned long)os.data[1]<< 8L)| 268 (unsigned long)os.data[2]; 269 } 270 else if ((ssl_version>>8) == 3) 271 { 272 if (os.length != 2) 273 { 274 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 275 goto err; 276 } 277 id=0x03000000L| 278 ((unsigned long)os.data[0]<<8L)| 279 (unsigned long)os.data[1]; 280 } 281 else 282 { 283 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION); 284 return(NULL); 285 } 286 287 ret->cipher=NULL; 288 ret->cipher_id=id; 289 290 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 291 if ((ssl_version>>8) == SSL3_VERSION) 292 i=SSL3_MAX_SSL_SESSION_ID_LENGTH; 293 else /* if (ssl_version == SSL2_VERSION) */ 294 i=SSL2_MAX_SSL_SESSION_ID_LENGTH; 295 296 if (os.length > i) 297 os.length = i; 298 if (os.length > sizeof ret->session_id) /* can't happen */ 299 os.length = sizeof ret->session_id; 300 301 ret->session_id_length=os.length; 302 OPENSSL_assert(os.length <= sizeof ret->session_id); 303 memcpy(ret->session_id,os.data,os.length); 304 305 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 306 if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH) 307 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; 308 else 309 ret->master_key_length=os.length; 310 memcpy(ret->master_key,os.data,ret->master_key_length); 311 312 os.length=0; 313 314 #ifndef OPENSSL_NO_KRB5 315 os.length=0; 316 M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING); 317 if (os.data) 318 { 319 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH) 320 ret->krb5_client_princ_len=0; 321 else 322 ret->krb5_client_princ_len=os.length; 323 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len); 324 OPENSSL_free(os.data); 325 os.data = NULL; 326 os.length = 0; 327 } 328 else 329 ret->krb5_client_princ_len=0; 330 #endif /* OPENSSL_NO_KRB5 */ 331 332 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING); 333 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 334 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH; 335 else 336 ret->key_arg_length=os.length; 337 memcpy(ret->key_arg,os.data,ret->key_arg_length); 338 if (os.data != NULL) OPENSSL_free(os.data); 339 340 ai.length=0; 341 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1); 342 if (ai.data != NULL) 343 { 344 ret->time=ASN1_INTEGER_get(aip); 345 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 346 } 347 else 348 ret->time=time(NULL); 349 350 ai.length=0; 351 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2); 352 if (ai.data != NULL) 353 { 354 ret->timeout=ASN1_INTEGER_get(aip); 355 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 356 } 357 else 358 ret->timeout=3; 359 360 if (ret->peer != NULL) 361 { 362 X509_free(ret->peer); 363 ret->peer=NULL; 364 } 365 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3); 366 367 os.length=0; 368 os.data=NULL; 369 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4); 370 371 if(os.data != NULL) 372 { 373 if (os.length > SSL_MAX_SID_CTX_LENGTH) 374 { 375 ret->sid_ctx_length=os.length; 376 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH); 377 } 378 else 379 { 380 ret->sid_ctx_length=os.length; 381 memcpy(ret->sid_ctx,os.data,os.length); 382 } 383 OPENSSL_free(os.data); os.data=NULL; os.length=0; 384 } 385 else 386 ret->sid_ctx_length=0; 387 388 ai.length=0; 389 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5); 390 if (ai.data != NULL) 391 { 392 ret->verify_result=ASN1_INTEGER_get(aip); 393 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 394 } 395 else 396 ret->verify_result=X509_V_OK; 397 398 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION); 399 } 400