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