asn1_par.c revision 55714
1/* crypto/asn1/asn1_par.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 "cryptlib.h" 61#include <openssl/buffer.h> 62#include <openssl/objects.h> 63#include <openssl/asn1.h> 64 65static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed, 66 int indent); 67static int asn1_parse2(BIO *bp, unsigned char **pp, long length, 68 int offset, int depth, int indent); 69static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, 70 int indent) 71 { 72 static const char fmt[]="%-18s"; 73 static const char fmt2[]="%2d %-15s"; 74 char str[128]; 75 const char *p,*p2=NULL; 76 77 if (constructed & V_ASN1_CONSTRUCTED) 78 p="cons: "; 79 else 80 p="prim: "; 81 if (BIO_write(bp,p,6) < 6) goto err; 82 if (indent) 83 { 84 if (indent > 128) indent=128; 85 memset(str,' ',indent); 86 if (BIO_write(bp,str,indent) < indent) goto err; 87 } 88 89 p=str; 90 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) 91 sprintf(str,"priv [ %d ] ",tag); 92 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) 93 sprintf(str,"cont [ %d ]",tag); 94 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) 95 sprintf(str,"appl [ %d ]",tag); 96 else if ((tag == V_ASN1_EOC) /* && (xclass == V_ASN1_UNIVERSAL) */) 97 p="EOC"; 98 else if (tag == V_ASN1_BOOLEAN) 99 p="BOOLEAN"; 100 else if (tag == V_ASN1_INTEGER) 101 p="INTEGER"; 102 else if (tag == V_ASN1_ENUMERATED) 103 p="ENUMERATED"; 104 else if (tag == V_ASN1_BIT_STRING) 105 p="BIT STRING"; 106 else if (tag == V_ASN1_OCTET_STRING) 107 p="OCTET STRING"; 108 else if (tag == V_ASN1_NULL) 109 p="NULL"; 110 else if (tag == V_ASN1_OBJECT) 111 p="OBJECT"; 112 else if (tag == V_ASN1_SEQUENCE) 113 p="SEQUENCE"; 114 else if (tag == V_ASN1_SET) 115 p="SET"; 116 else if (tag == V_ASN1_PRINTABLESTRING) 117 p="PRINTABLESTRING"; 118 else if (tag == V_ASN1_T61STRING) 119 p="T61STRING"; 120 else if (tag == V_ASN1_IA5STRING) 121 p="IA5STRING"; 122 else if (tag == V_ASN1_UTCTIME) 123 p="UTCTIME"; 124 125 /* extras */ 126 else if (tag == V_ASN1_NUMERICSTRING) 127 p="NUMERICSTRING"; 128 else if (tag == V_ASN1_VIDEOTEXSTRING) 129 p="VIDEOTEXSTRING"; 130 else if (tag == V_ASN1_GENERALIZEDTIME) 131 p="GENERALIZEDTIME"; 132 else if (tag == V_ASN1_GRAPHICSTRING) 133 p="GRAPHICSTRING"; 134 else if (tag == V_ASN1_VISIBLESTRING) 135 p="VISIBLESTRING"; 136 else if (tag == V_ASN1_GENERALSTRING) 137 p="GENERALSTRING"; 138 else if (tag == V_ASN1_UNIVERSALSTRING) 139 p="UNIVERSALSTRING"; 140 else if (tag == V_ASN1_BMPSTRING) 141 p="BMPSTRING"; 142 else 143 p2="(unknown)"; 144 145 if (p2 != NULL) 146 { 147 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err; 148 } 149 else 150 { 151 if (BIO_printf(bp,fmt,p) <= 0) goto err; 152 } 153 return(1); 154err: 155 return(0); 156 } 157 158int ASN1_parse(BIO *bp, unsigned char *pp, long len, int indent) 159 { 160 return(asn1_parse2(bp,&pp,len,0,0,indent)); 161 } 162 163static int asn1_parse2(BIO *bp, unsigned char **pp, long length, int offset, 164 int depth, int indent) 165 { 166 unsigned char *p,*ep,*tot,*op,*opp; 167 long len; 168 int tag,xclass,ret=0; 169 int nl,hl,j,r; 170 ASN1_OBJECT *o=NULL; 171 ASN1_OCTET_STRING *os=NULL; 172 /* ASN1_BMPSTRING *bmp=NULL;*/ 173 174 p= *pp; 175 tot=p+length; 176 op=p-1; 177 while ((p < tot) && (op < p)) 178 { 179 op=p; 180 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 181#ifdef LINT 182 j=j; 183#endif 184 if (j & 0x80) 185 { 186 if (BIO_write(bp,"Error in encoding\n",18) <= 0) 187 goto end; 188 ret=0; 189 goto end; 190 } 191 hl=(p-op); 192 length-=hl; 193 /* if j == 0x21 it is a constructed indefinite length object */ 194 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 195 <= 0) goto end; 196 197 if (j != (V_ASN1_CONSTRUCTED | 1)) 198 { 199 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 200 depth,(long)hl,len) <= 0) 201 goto end; 202 } 203 else 204 { 205 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 206 depth,(long)hl) <= 0) 207 goto end; 208 } 209 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 210 goto end; 211 if (j & V_ASN1_CONSTRUCTED) 212 { 213 ep=p+len; 214 if (BIO_write(bp,"\n",1) <= 0) goto end; 215 if (len > length) 216 { 217 BIO_printf(bp, 218 "length is greater than %ld\n",length); 219 ret=0; 220 goto end; 221 } 222 if ((j == 0x21) && (len == 0)) 223 { 224 for (;;) 225 { 226 r=asn1_parse2(bp,&p,(long)(tot-p), 227 offset+(p - *pp),depth+1, 228 indent); 229 if (r == 0) { ret=0; goto end; } 230 if ((r == 2) || (p >= tot)) break; 231 } 232 } 233 else 234 while (p < ep) 235 { 236 r=asn1_parse2(bp,&p,(long)len, 237 offset+(p - *pp),depth+1, 238 indent); 239 if (r == 0) { ret=0; goto end; } 240 } 241 } 242 else if (xclass != 0) 243 { 244 p+=len; 245 if (BIO_write(bp,"\n",1) <= 0) goto end; 246 } 247 else 248 { 249 nl=0; 250 if ( (tag == V_ASN1_PRINTABLESTRING) || 251 (tag == V_ASN1_T61STRING) || 252 (tag == V_ASN1_IA5STRING) || 253 (tag == V_ASN1_VISIBLESTRING) || 254 (tag == V_ASN1_UTCTIME) || 255 (tag == V_ASN1_GENERALIZEDTIME)) 256 { 257 if (BIO_write(bp,":",1) <= 0) goto end; 258 if ((len > 0) && 259 BIO_write(bp,(char *)p,(int)len) 260 != (int)len) 261 goto end; 262 } 263 else if (tag == V_ASN1_OBJECT) 264 { 265 opp=op; 266 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 267 { 268 if (BIO_write(bp,":",1) <= 0) goto end; 269 i2a_ASN1_OBJECT(bp,o); 270 } 271 else 272 { 273 if (BIO_write(bp,":BAD OBJECT",11) <= 0) 274 goto end; 275 } 276 } 277 else if (tag == V_ASN1_BOOLEAN) 278 { 279 int ii; 280 281 opp=op; 282 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 283 if (ii < 0) 284 { 285 if (BIO_write(bp,"Bad boolean\n",12)) 286 goto end; 287 } 288 BIO_printf(bp,":%d",ii); 289 } 290 else if (tag == V_ASN1_BMPSTRING) 291 { 292 /* do the BMP thang */ 293 } 294 else if (tag == V_ASN1_OCTET_STRING) 295 { 296 int i,printable=1; 297 298 opp=op; 299 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 300 if (os != NULL) 301 { 302 opp=os->data; 303 for (i=0; i<os->length; i++) 304 { 305 if (( (opp[i] < ' ') && 306 (opp[i] != '\n') && 307 (opp[i] != '\r') && 308 (opp[i] != '\t')) || 309 (opp[i] > '~')) 310 { 311 printable=0; 312 break; 313 } 314 } 315 if (printable && (os->length > 0)) 316 { 317 if (BIO_write(bp,":",1) <= 0) 318 goto end; 319 if (BIO_write(bp,(char *)opp, 320 os->length) <= 0) 321 goto end; 322 } 323 ASN1_OCTET_STRING_free(os); 324 os=NULL; 325 } 326 } 327 else if (tag == V_ASN1_INTEGER) 328 { 329 ASN1_INTEGER *bs; 330 int i; 331 332 opp=op; 333 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 334 if (bs != NULL) 335 { 336 if (BIO_write(bp,":",1) <= 0) goto end; 337 if (bs->type == V_ASN1_NEG_INTEGER) 338 if (BIO_write(bp,"-",1) <= 0) 339 goto end; 340 for (i=0; i<bs->length; i++) 341 { 342 if (BIO_printf(bp,"%02X", 343 bs->data[i]) <= 0) 344 goto end; 345 } 346 if (bs->length == 0) 347 { 348 if (BIO_write(bp,"00",2) <= 0) 349 goto end; 350 } 351 } 352 else 353 { 354 if (BIO_write(bp,"BAD INTEGER",11) <= 0) 355 goto end; 356 } 357 ASN1_INTEGER_free(bs); 358 } 359 else if (tag == V_ASN1_ENUMERATED) 360 { 361 ASN1_ENUMERATED *bs; 362 int i; 363 364 opp=op; 365 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 366 if (bs != NULL) 367 { 368 if (BIO_write(bp,":",1) <= 0) goto end; 369 if (bs->type == V_ASN1_NEG_ENUMERATED) 370 if (BIO_write(bp,"-",1) <= 0) 371 goto end; 372 for (i=0; i<bs->length; i++) 373 { 374 if (BIO_printf(bp,"%02X", 375 bs->data[i]) <= 0) 376 goto end; 377 } 378 if (bs->length == 0) 379 { 380 if (BIO_write(bp,"00",2) <= 0) 381 goto end; 382 } 383 } 384 else 385 { 386 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) 387 goto end; 388 } 389 ASN1_ENUMERATED_free(bs); 390 } 391 392 if (!nl) 393 { 394 if (BIO_write(bp,"\n",1) <= 0) goto end; 395 } 396 p+=len; 397 if ((tag == V_ASN1_EOC) && (xclass == 0)) 398 { 399 ret=2; /* End of sequence */ 400 goto end; 401 } 402 } 403 length-=len; 404 } 405 ret=1; 406end: 407 if (o != NULL) ASN1_OBJECT_free(o); 408 if (os != NULL) ASN1_OCTET_STRING_free(os); 409 *pp=p; 410 return(ret); 411 } 412