asn1_par.c revision 127128
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, 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 p = ASN1_tag2str(tag); 92 93 if (p2 != NULL) 94 { 95 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err; 96 } 97 else 98 { 99 if (BIO_printf(bp,fmt,p) <= 0) goto err; 100 } 101 return(1); 102err: 103 return(0); 104 } 105 106int ASN1_parse(BIO *bp, unsigned char *pp, long len, int indent) 107 { 108 return(asn1_parse2(bp,&pp,len,0,0,indent,0)); 109 } 110 111int ASN1_parse_dump(BIO *bp, unsigned char *pp, long len, int indent, int dump) 112 { 113 return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); 114 } 115 116static int asn1_parse2(BIO *bp, unsigned char **pp, long length, int offset, 117 int depth, int indent, int dump) 118 { 119 unsigned char *p,*ep,*tot,*op,*opp; 120 long len; 121 int tag,xclass,ret=0; 122 int nl,hl,j,r; 123 ASN1_OBJECT *o=NULL; 124 ASN1_OCTET_STRING *os=NULL; 125 /* ASN1_BMPSTRING *bmp=NULL;*/ 126 int dump_indent; 127 128#if 0 129 dump_indent = indent; 130#else 131 dump_indent = 6; /* Because we know BIO_dump_indent() */ 132#endif 133 p= *pp; 134 tot=p+length; 135 op=p-1; 136 while ((p < tot) && (op < p)) 137 { 138 op=p; 139 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 140#ifdef LINT 141 j=j; 142#endif 143 if (j & 0x80) 144 { 145 if (BIO_write(bp,"Error in encoding\n",18) <= 0) 146 goto end; 147 ret=0; 148 goto end; 149 } 150 hl=(p-op); 151 length-=hl; 152 /* if j == 0x21 it is a constructed indefinite length object */ 153 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 154 <= 0) goto end; 155 156 if (j != (V_ASN1_CONSTRUCTED | 1)) 157 { 158 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 159 depth,(long)hl,len) <= 0) 160 goto end; 161 } 162 else 163 { 164 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 165 depth,(long)hl) <= 0) 166 goto end; 167 } 168 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 169 goto end; 170 if (j & V_ASN1_CONSTRUCTED) 171 { 172 ep=p+len; 173 if (BIO_write(bp,"\n",1) <= 0) goto end; 174 if (len > length) 175 { 176 BIO_printf(bp, 177 "length is greater than %ld\n",length); 178 ret=0; 179 goto end; 180 } 181 if ((j == 0x21) && (len == 0)) 182 { 183 for (;;) 184 { 185 r=asn1_parse2(bp,&p,(long)(tot-p), 186 offset+(p - *pp),depth+1, 187 indent,dump); 188 if (r == 0) { ret=0; goto end; } 189 if ((r == 2) || (p >= tot)) break; 190 } 191 } 192 else 193 while (p < ep) 194 { 195 r=asn1_parse2(bp,&p,(long)len, 196 offset+(p - *pp),depth+1, 197 indent,dump); 198 if (r == 0) { ret=0; goto end; } 199 } 200 } 201 else if (xclass != 0) 202 { 203 p+=len; 204 if (BIO_write(bp,"\n",1) <= 0) goto end; 205 } 206 else 207 { 208 nl=0; 209 if ( (tag == V_ASN1_PRINTABLESTRING) || 210 (tag == V_ASN1_T61STRING) || 211 (tag == V_ASN1_IA5STRING) || 212 (tag == V_ASN1_VISIBLESTRING) || 213 (tag == V_ASN1_UTCTIME) || 214 (tag == V_ASN1_GENERALIZEDTIME)) 215 { 216 if (BIO_write(bp,":",1) <= 0) goto end; 217 if ((len > 0) && 218 BIO_write(bp,(char *)p,(int)len) 219 != (int)len) 220 goto end; 221 } 222 else if (tag == V_ASN1_OBJECT) 223 { 224 opp=op; 225 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 226 { 227 if (BIO_write(bp,":",1) <= 0) goto end; 228 i2a_ASN1_OBJECT(bp,o); 229 } 230 else 231 { 232 if (BIO_write(bp,":BAD OBJECT",11) <= 0) 233 goto end; 234 } 235 } 236 else if (tag == V_ASN1_BOOLEAN) 237 { 238 int ii; 239 240 opp=op; 241 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 242 if (ii < 0) 243 { 244 if (BIO_write(bp,"Bad boolean\n",12)) 245 goto end; 246 } 247 BIO_printf(bp,":%d",ii); 248 } 249 else if (tag == V_ASN1_BMPSTRING) 250 { 251 /* do the BMP thang */ 252 } 253 else if (tag == V_ASN1_OCTET_STRING) 254 { 255 int i,printable=1; 256 257 opp=op; 258 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 259 if (os != NULL) 260 { 261 opp=os->data; 262 for (i=0; i<os->length; i++) 263 { 264 if (( (opp[i] < ' ') && 265 (opp[i] != '\n') && 266 (opp[i] != '\r') && 267 (opp[i] != '\t')) || 268 (opp[i] > '~')) 269 { 270 printable=0; 271 break; 272 } 273 } 274 if (printable && (os->length > 0)) 275 { 276 if (BIO_write(bp,":",1) <= 0) 277 goto end; 278 if (BIO_write(bp,(char *)opp, 279 os->length) <= 0) 280 goto end; 281 } 282 if (!printable && (os->length > 0) 283 && dump) 284 { 285 if (!nl) 286 { 287 if (BIO_write(bp,"\n",1) <= 0) 288 goto end; 289 } 290 if (BIO_dump_indent(bp,(char *)opp, 291 ((dump == -1 || dump > os->length)?os->length:dump), 292 dump_indent) <= 0) 293 goto end; 294 nl=1; 295 } 296 M_ASN1_OCTET_STRING_free(os); 297 os=NULL; 298 } 299 } 300 else if (tag == V_ASN1_INTEGER) 301 { 302 ASN1_INTEGER *bs; 303 int i; 304 305 opp=op; 306 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 307 if (bs != NULL) 308 { 309 if (BIO_write(bp,":",1) <= 0) goto end; 310 if (bs->type == V_ASN1_NEG_INTEGER) 311 if (BIO_write(bp,"-",1) <= 0) 312 goto end; 313 for (i=0; i<bs->length; i++) 314 { 315 if (BIO_printf(bp,"%02X", 316 bs->data[i]) <= 0) 317 goto end; 318 } 319 if (bs->length == 0) 320 { 321 if (BIO_write(bp,"00",2) <= 0) 322 goto end; 323 } 324 } 325 else 326 { 327 if (BIO_write(bp,"BAD INTEGER",11) <= 0) 328 goto end; 329 } 330 M_ASN1_INTEGER_free(bs); 331 } 332 else if (tag == V_ASN1_ENUMERATED) 333 { 334 ASN1_ENUMERATED *bs; 335 int i; 336 337 opp=op; 338 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 339 if (bs != NULL) 340 { 341 if (BIO_write(bp,":",1) <= 0) goto end; 342 if (bs->type == V_ASN1_NEG_ENUMERATED) 343 if (BIO_write(bp,"-",1) <= 0) 344 goto end; 345 for (i=0; i<bs->length; i++) 346 { 347 if (BIO_printf(bp,"%02X", 348 bs->data[i]) <= 0) 349 goto end; 350 } 351 if (bs->length == 0) 352 { 353 if (BIO_write(bp,"00",2) <= 0) 354 goto end; 355 } 356 } 357 else 358 { 359 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) 360 goto end; 361 } 362 M_ASN1_ENUMERATED_free(bs); 363 } 364 else if (len > 0 && dump) 365 { 366 if (!nl) 367 { 368 if (BIO_write(bp,"\n",1) <= 0) 369 goto end; 370 } 371 if (BIO_dump_indent(bp,(char *)p, 372 ((dump == -1 || dump > len)?len:dump), 373 dump_indent) <= 0) 374 goto end; 375 nl=1; 376 } 377 378 if (!nl) 379 { 380 if (BIO_write(bp,"\n",1) <= 0) goto end; 381 } 382 p+=len; 383 if ((tag == V_ASN1_EOC) && (xclass == 0)) 384 { 385 ret=2; /* End of sequence */ 386 goto end; 387 } 388 } 389 length-=len; 390 } 391 ret=1; 392end: 393 if (o != NULL) ASN1_OBJECT_free(o); 394 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 395 *pp=p; 396 return(ret); 397 } 398 399const char *ASN1_tag2str(int tag) 400{ 401 const static char *tag2str[] = { 402 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ 403 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ 404 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ 405 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ 406 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ 407 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ 408 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ 409 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ 410 }; 411 412 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) 413 tag &= ~0x100; 414 415 if(tag < 0 || tag > 30) return "(unknown)"; 416 return tag2str[tag]; 417} 418 419