asn1_par.c revision 160814
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, const unsigned char **pp, long length, 68 int offset, int depth, int indent, int dump); 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 BIO_indent(bp,indent,128); 83 84 p=str; 85 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) 86 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag); 87 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) 88 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag); 89 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) 90 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag); 91 else if (tag > 30) 92 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag); 93 else 94 p = ASN1_tag2str(tag); 95 96 if (p2 != NULL) 97 { 98 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err; 99 } 100 else 101 { 102 if (BIO_printf(bp,fmt,p) <= 0) goto err; 103 } 104 return(1); 105err: 106 return(0); 107 } 108 109int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) 110 { 111 return(asn1_parse2(bp,&pp,len,0,0,indent,0)); 112 } 113 114int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) 115 { 116 return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); 117 } 118 119static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, 120 int depth, int indent, int dump) 121 { 122 const unsigned char *p,*ep,*tot,*op,*opp; 123 long len; 124 int tag,xclass,ret=0; 125 int nl,hl,j,r; 126 ASN1_OBJECT *o=NULL; 127 ASN1_OCTET_STRING *os=NULL; 128 /* ASN1_BMPSTRING *bmp=NULL;*/ 129 int dump_indent; 130 131#if 0 132 dump_indent = indent; 133#else 134 dump_indent = 6; /* Because we know BIO_dump_indent() */ 135#endif 136 p= *pp; 137 tot=p+length; 138 op=p-1; 139 while ((p < tot) && (op < p)) 140 { 141 op=p; 142 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 143#ifdef LINT 144 j=j; 145#endif 146 if (j & 0x80) 147 { 148 if (BIO_write(bp,"Error in encoding\n",18) <= 0) 149 goto end; 150 ret=0; 151 goto end; 152 } 153 hl=(p-op); 154 length-=hl; 155 /* if j == 0x21 it is a constructed indefinite length object */ 156 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 157 <= 0) goto end; 158 159 if (j != (V_ASN1_CONSTRUCTED | 1)) 160 { 161 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 162 depth,(long)hl,len) <= 0) 163 goto end; 164 } 165 else 166 { 167 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 168 depth,(long)hl) <= 0) 169 goto end; 170 } 171 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 172 goto end; 173 if (j & V_ASN1_CONSTRUCTED) 174 { 175 ep=p+len; 176 if (BIO_write(bp,"\n",1) <= 0) goto end; 177 if (len > length) 178 { 179 BIO_printf(bp, 180 "length is greater than %ld\n",length); 181 ret=0; 182 goto end; 183 } 184 if ((j == 0x21) && (len == 0)) 185 { 186 for (;;) 187 { 188 r=asn1_parse2(bp,&p,(long)(tot-p), 189 offset+(p - *pp),depth+1, 190 indent,dump); 191 if (r == 0) { ret=0; goto end; } 192 if ((r == 2) || (p >= tot)) break; 193 } 194 } 195 else 196 while (p < ep) 197 { 198 r=asn1_parse2(bp,&p,(long)len, 199 offset+(p - *pp),depth+1, 200 indent,dump); 201 if (r == 0) { ret=0; goto end; } 202 } 203 } 204 else if (xclass != 0) 205 { 206 p+=len; 207 if (BIO_write(bp,"\n",1) <= 0) goto end; 208 } 209 else 210 { 211 nl=0; 212 if ( (tag == V_ASN1_PRINTABLESTRING) || 213 (tag == V_ASN1_T61STRING) || 214 (tag == V_ASN1_IA5STRING) || 215 (tag == V_ASN1_VISIBLESTRING) || 216 (tag == V_ASN1_UTCTIME) || 217 (tag == V_ASN1_GENERALIZEDTIME)) 218 { 219 if (BIO_write(bp,":",1) <= 0) goto end; 220 if ((len > 0) && 221 BIO_write(bp,(const char *)p,(int)len) 222 != (int)len) 223 goto end; 224 } 225 else if (tag == V_ASN1_OBJECT) 226 { 227 opp=op; 228 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 229 { 230 if (BIO_write(bp,":",1) <= 0) goto end; 231 i2a_ASN1_OBJECT(bp,o); 232 } 233 else 234 { 235 if (BIO_write(bp,":BAD OBJECT",11) <= 0) 236 goto end; 237 } 238 } 239 else if (tag == V_ASN1_BOOLEAN) 240 { 241 int ii; 242 243 opp=op; 244 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 245 if (ii < 0) 246 { 247 if (BIO_write(bp,"Bad boolean\n",12)) 248 goto end; 249 } 250 BIO_printf(bp,":%d",ii); 251 } 252 else if (tag == V_ASN1_BMPSTRING) 253 { 254 /* do the BMP thang */ 255 } 256 else if (tag == V_ASN1_OCTET_STRING) 257 { 258 int i,printable=1; 259 260 opp=op; 261 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 262 if (os != NULL && os->length > 0) 263 { 264 opp = os->data; 265 /* testing whether the octet string is 266 * printable */ 267 for (i=0; i<os->length; i++) 268 { 269 if (( (opp[i] < ' ') && 270 (opp[i] != '\n') && 271 (opp[i] != '\r') && 272 (opp[i] != '\t')) || 273 (opp[i] > '~')) 274 { 275 printable=0; 276 break; 277 } 278 } 279 if (printable) 280 /* printable string */ 281 { 282 if (BIO_write(bp,":",1) <= 0) 283 goto end; 284 if (BIO_write(bp,(const char *)opp, 285 os->length) <= 0) 286 goto end; 287 } 288 else if (!dump) 289 /* not printable => print octet string 290 * as hex dump */ 291 { 292 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0) 293 goto end; 294 for (i=0; i<os->length; i++) 295 { 296 if (BIO_printf(bp,"%02X" 297 , opp[i]) <= 0) 298 goto end; 299 } 300 } 301 else 302 /* print the normal dump */ 303 { 304 if (!nl) 305 { 306 if (BIO_write(bp,"\n",1) <= 0) 307 goto end; 308 } 309 if (BIO_dump_indent(bp, 310 (const char *)opp, 311 ((dump == -1 || dump > 312 os->length)?os->length:dump), 313 dump_indent) <= 0) 314 goto end; 315 nl=1; 316 } 317 } 318 if (os != NULL) 319 { 320 M_ASN1_OCTET_STRING_free(os); 321 os=NULL; 322 } 323 } 324 else if (tag == V_ASN1_INTEGER) 325 { 326 ASN1_INTEGER *bs; 327 int i; 328 329 opp=op; 330 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 331 if (bs != NULL) 332 { 333 if (BIO_write(bp,":",1) <= 0) goto end; 334 if (bs->type == V_ASN1_NEG_INTEGER) 335 if (BIO_write(bp,"-",1) <= 0) 336 goto end; 337 for (i=0; i<bs->length; i++) 338 { 339 if (BIO_printf(bp,"%02X", 340 bs->data[i]) <= 0) 341 goto end; 342 } 343 if (bs->length == 0) 344 { 345 if (BIO_write(bp,"00",2) <= 0) 346 goto end; 347 } 348 } 349 else 350 { 351 if (BIO_write(bp,"BAD INTEGER",11) <= 0) 352 goto end; 353 } 354 M_ASN1_INTEGER_free(bs); 355 } 356 else if (tag == V_ASN1_ENUMERATED) 357 { 358 ASN1_ENUMERATED *bs; 359 int i; 360 361 opp=op; 362 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 363 if (bs != NULL) 364 { 365 if (BIO_write(bp,":",1) <= 0) goto end; 366 if (bs->type == V_ASN1_NEG_ENUMERATED) 367 if (BIO_write(bp,"-",1) <= 0) 368 goto end; 369 for (i=0; i<bs->length; i++) 370 { 371 if (BIO_printf(bp,"%02X", 372 bs->data[i]) <= 0) 373 goto end; 374 } 375 if (bs->length == 0) 376 { 377 if (BIO_write(bp,"00",2) <= 0) 378 goto end; 379 } 380 } 381 else 382 { 383 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) 384 goto end; 385 } 386 M_ASN1_ENUMERATED_free(bs); 387 } 388 else if (len > 0 && dump) 389 { 390 if (!nl) 391 { 392 if (BIO_write(bp,"\n",1) <= 0) 393 goto end; 394 } 395 if (BIO_dump_indent(bp,(const char *)p, 396 ((dump == -1 || dump > len)?len:dump), 397 dump_indent) <= 0) 398 goto end; 399 nl=1; 400 } 401 402 if (!nl) 403 { 404 if (BIO_write(bp,"\n",1) <= 0) goto end; 405 } 406 p+=len; 407 if ((tag == V_ASN1_EOC) && (xclass == 0)) 408 { 409 ret=2; /* End of sequence */ 410 goto end; 411 } 412 } 413 length-=len; 414 } 415 ret=1; 416end: 417 if (o != NULL) ASN1_OBJECT_free(o); 418 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 419 *pp=p; 420 return(ret); 421 } 422 423const char *ASN1_tag2str(int tag) 424{ 425 static const char *tag2str[] = { 426 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ 427 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ 428 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ 429 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ 430 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ 431 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ 432 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ 433 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ 434 }; 435 436 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) 437 tag &= ~0x100; 438 439 if(tag < 0 || tag > 30) return "(unknown)"; 440 return tag2str[tag]; 441} 442 443