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 "ssl_locl.h" 64 65 typedef struct ssl_session_asn1_st 66 { 67 ASN1_INTEGER version; 68 ASN1_INTEGER ssl_version; 69 ASN1_OCTET_STRING cipher; 70 ASN1_OCTET_STRING master_key; 71 ASN1_OCTET_STRING session_id; 72 ASN1_OCTET_STRING session_id_context; 73 ASN1_OCTET_STRING key_arg; 74 ASN1_INTEGER time; 75 ASN1_INTEGER timeout; 76 } SSL_SESSION_ASN1; 77 78 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 79 { 80 #define LSIZE2 (sizeof(long)*2) 81 int v1=0,v2=0,v3=0,v4=0; 82 unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2]; 83 unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2]; 84 long l; 85 SSL_SESSION_ASN1 a; 86 M_ASN1_I2D_vars(in); 87 88 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 89 return(0); 90 91 /* Note that I cheat in the following 2 assignments. I know 92 * that if the ASN1_INTERGER passed to ASN1_INTEGER_set 93 * is > sizeof(long)+1, the buffer will not be re-Malloc()ed. 94 * This is a bit evil but makes things simple, no dynamic allocation 95 * to clean up :-) */ 96 a.version.length=LSIZE2; 97 a.version.type=V_ASN1_INTEGER; 98 a.version.data=ibuf1; 99 ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION); 100 101 a.ssl_version.length=LSIZE2; 102 a.ssl_version.type=V_ASN1_INTEGER; 103 a.ssl_version.data=ibuf2; 104 ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version); 105 106 a.cipher.type=V_ASN1_OCTET_STRING; 107 a.cipher.data=buf; 108 109 if (in->cipher == NULL) 110 l=in->cipher_id; 111 else 112 l=in->cipher->id; 113 if (in->ssl_version == SSL2_VERSION) 114 { 115 a.cipher.length=3; 116 buf[0]=((unsigned char)(l>>16L))&0xff; 117 buf[1]=((unsigned char)(l>> 8L))&0xff; 118 buf[2]=((unsigned char)(l ))&0xff; 119 } 120 else 121 { 122 a.cipher.length=2; 123 buf[0]=((unsigned char)(l>>8L))&0xff; 124 buf[1]=((unsigned char)(l ))&0xff; 125 } 126 127 a.master_key.length=in->master_key_length; 128 a.master_key.type=V_ASN1_OCTET_STRING; 129 a.master_key.data=in->master_key; 130 131 a.session_id.length=in->session_id_length; 132 a.session_id.type=V_ASN1_OCTET_STRING; 133 a.session_id.data=in->session_id; 134 135 a.session_id_context.length=in->sid_ctx_length; 136 a.session_id_context.type=V_ASN1_OCTET_STRING; 137 a.session_id_context.data=in->sid_ctx; 138 139 a.key_arg.length=in->key_arg_length; 140 a.key_arg.type=V_ASN1_OCTET_STRING; 141 a.key_arg.data=in->key_arg; 142 143 if (in->time != 0L) 144 { 145 a.time.length=LSIZE2; 146 a.time.type=V_ASN1_INTEGER; 147 a.time.data=ibuf3; 148 ASN1_INTEGER_set(&(a.time),in->time); 149 } 150 151 if (in->timeout != 0L) 152 { 153 a.timeout.length=LSIZE2; 154 a.timeout.type=V_ASN1_INTEGER; 155 a.timeout.data=ibuf4; 156 ASN1_INTEGER_set(&(a.timeout),in->timeout); 157 } 158 159 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 160 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 161 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 162 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 163 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 164 if (in->key_arg_length > 0) 165 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING); 166 if (in->time != 0L) 167 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 168 if (in->timeout != 0L) 169 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 170 if (in->peer != NULL) 171 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3); 172 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4); 173 174 M_ASN1_I2D_seq_total(); 175 176 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 177 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 178 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 179 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 180 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 181 if (in->key_arg_length > 0) 182 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0); 183 if (in->time != 0L) 184 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 185 if (in->timeout != 0L) 186 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 187 if (in->peer != NULL) 188 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3); 189 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4, 190 v4); 191 192 M_ASN1_I2D_finish(); 193 } 194 195 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, unsigned char **pp, 196 long length) 197 { 198 int version,ssl_version=0,i; 199 long id; 200 ASN1_INTEGER ai,*aip; 201 ASN1_OCTET_STRING os,*osp; 202 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new); 203 204 aip= &ai; 205 osp= &os; 206 207 M_ASN1_D2I_Init(); 208 M_ASN1_D2I_start_sequence(); 209 210 ai.data=NULL; ai.length=0; 211 M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER); 212 version=(int)ASN1_INTEGER_get(aip); 213 if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; } 214 215 /* we don't care about the version right now :-) */ 216 M_ASN1_D2I_get(aip,d2i_ASN1_INTEGER); 217 ssl_version=(int)ASN1_INTEGER_get(aip); 218 ret->ssl_version=ssl_version; 219 if (ai.data != NULL) { Free(ai.data); ai.data=NULL; ai.length=0; } 220 221 os.data=NULL; os.length=0; 222 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 223 if (ssl_version == SSL2_VERSION) 224 { 225 if (os.length != 3) 226 { 227 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 228 goto err; 229 } 230 id=0x02000000L| 231 ((unsigned long)os.data[0]<<16L)| 232 ((unsigned long)os.data[1]<< 8L)| 233 (unsigned long)os.data[2]; 234 } 235 else if ((ssl_version>>8) == 3) 236 { 237 if (os.length != 2) 238 { 239 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 240 goto err; 241 } 242 id=0x03000000L| 243 ((unsigned long)os.data[0]<<8L)| 244 (unsigned long)os.data[1]; 245 } 246 else 247 { 248 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION); 249 return(NULL); 250 } 251 252 ret->cipher=NULL; 253 ret->cipher_id=id; 254 255 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 256 if ((ssl_version>>8) == SSL3_VERSION) 257 i=SSL3_MAX_SSL_SESSION_ID_LENGTH; 258 else /* if (ssl_version == SSL2_VERSION) */ 259 i=SSL2_MAX_SSL_SESSION_ID_LENGTH; 260 261 if (os.length > i) 262 os.length=i; 263 264 ret->session_id_length=os.length; 265 memcpy(ret->session_id,os.data,os.length); 266 267 M_ASN1_D2I_get(osp,d2i_ASN1_OCTET_STRING); 268 if (ret->master_key_length > SSL_MAX_MASTER_KEY_LENGTH) 269 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; 270 else 271 ret->master_key_length=os.length; 272 memcpy(ret->master_key,os.data,ret->master_key_length); 273 274 os.length=0; 275 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING); 276 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 277 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH; 278 else 279 ret->key_arg_length=os.length; 280 memcpy(ret->key_arg,os.data,ret->key_arg_length); 281 if (os.data != NULL) Free(os.data); 282 283 ai.length=0; 284 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1); 285 if (ai.data != NULL) 286 { 287 ret->time=ASN1_INTEGER_get(aip); 288 Free(ai.data); ai.data=NULL; ai.length=0; 289 } 290 else 291 ret->time=time(NULL); 292 293 ai.length=0; 294 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2); 295 if (ai.data != NULL) 296 { 297 ret->timeout=ASN1_INTEGER_get(aip); 298 Free(ai.data); ai.data=NULL; ai.length=0; 299 } 300 else 301 ret->timeout=3; 302 303 if (ret->peer != NULL) 304 { 305 X509_free(ret->peer); 306 ret->peer=NULL; 307 } 308 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3); 309 310 os.length=0; 311 os.data=NULL; 312 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4); 313 314 if(os.data != NULL) 315 { 316 if (os.length > SSL_MAX_SID_CTX_LENGTH) 317 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH); 318 ret->sid_ctx_length=os.length; 319 memcpy(ret->sid_ctx,os.data,os.length); 320 Free(os.data); os.data=NULL; os.length=0; 321 } 322 else 323 ret->sid_ctx_length=0; 324 325 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION); 326 } 327 328