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 char str[128]; 74 const char *p; 75 76 if (constructed & V_ASN1_CONSTRUCTED) 77 p="cons: "; 78 else 79 p="prim: "; 80 if (BIO_write(bp,p,6) < 6) goto err; 81 BIO_indent(bp,indent,128); 82 83 p=str; 84 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) 85 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag); 86 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) 87 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag); 88 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) 89 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag); 90 else if (tag > 30) 91 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag); 92 else 93 p = ASN1_tag2str(tag); 94 95 if (BIO_printf(bp,fmt,p) <= 0) 96 goto err; 97 return(1); 98err: 99 return(0); 100 } 101 102int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) 103 { 104 return(asn1_parse2(bp,&pp,len,0,0,indent,0)); 105 } 106 107int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) 108 { 109 return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); 110 } 111 112static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, 113 int depth, int indent, int dump) 114 { 115 const unsigned char *p,*ep,*tot,*op,*opp; 116 long len; 117 int tag,xclass,ret=0; 118 int nl,hl,j,r; 119 ASN1_OBJECT *o=NULL; 120 ASN1_OCTET_STRING *os=NULL; 121 /* ASN1_BMPSTRING *bmp=NULL;*/ 122 int dump_indent; 123 124#if 0 125 dump_indent = indent; 126#else 127 dump_indent = 6; /* Because we know BIO_dump_indent() */ 128#endif 129 p= *pp; 130 tot=p+length; 131 op=p-1; 132 while ((p < tot) && (op < p)) 133 { 134 op=p; 135 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 136#ifdef LINT 137 j=j; 138#endif 139 if (j & 0x80) 140 { 141 if (BIO_write(bp,"Error in encoding\n",18) <= 0) 142 goto end; 143 ret=0; 144 goto end; 145 } 146 hl=(p-op); 147 length-=hl; 148 /* if j == 0x21 it is a constructed indefinite length object */ 149 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 150 <= 0) goto end; 151 152 if (j != (V_ASN1_CONSTRUCTED | 1)) 153 { 154 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 155 depth,(long)hl,len) <= 0) 156 goto end; 157 } 158 else 159 { 160 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 161 depth,(long)hl) <= 0) 162 goto end; 163 } 164 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 165 goto end; 166 if (j & V_ASN1_CONSTRUCTED) 167 { 168 ep=p+len; 169 if (BIO_write(bp,"\n",1) <= 0) goto end; 170 if (len > length) 171 { 172 BIO_printf(bp, 173 "length is greater than %ld\n",length); 174 ret=0; 175 goto end; 176 } 177 if ((j == 0x21) && (len == 0)) 178 { 179 for (;;) 180 { 181 r=asn1_parse2(bp,&p,(long)(tot-p), 182 offset+(p - *pp),depth+1, 183 indent,dump); 184 if (r == 0) { ret=0; goto end; } 185 if ((r == 2) || (p >= tot)) break; 186 } 187 } 188 else 189 while (p < ep) 190 { 191 r=asn1_parse2(bp,&p,(long)len, 192 offset+(p - *pp),depth+1, 193 indent,dump); 194 if (r == 0) { ret=0; goto end; } 195 } 196 } 197 else if (xclass != 0) 198 { 199 p+=len; 200 if (BIO_write(bp,"\n",1) <= 0) goto end; 201 } 202 else 203 { 204 nl=0; 205 if ( (tag == V_ASN1_PRINTABLESTRING) || 206 (tag == V_ASN1_T61STRING) || 207 (tag == V_ASN1_IA5STRING) || 208 (tag == V_ASN1_VISIBLESTRING) || 209 (tag == V_ASN1_NUMERICSTRING) || 210 (tag == V_ASN1_UTF8STRING) || 211 (tag == V_ASN1_UTCTIME) || 212 (tag == V_ASN1_GENERALIZEDTIME)) 213 { 214 if (BIO_write(bp,":",1) <= 0) goto end; 215 if ((len > 0) && 216 BIO_write(bp,(const char *)p,(int)len) 217 != (int)len) 218 goto end; 219 } 220 else if (tag == V_ASN1_OBJECT) 221 { 222 opp=op; 223 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 224 { 225 if (BIO_write(bp,":",1) <= 0) goto end; 226 i2a_ASN1_OBJECT(bp,o); 227 } 228 else 229 { 230 if (BIO_write(bp,":BAD OBJECT",11) <= 0) 231 goto end; 232 } 233 } 234 else if (tag == V_ASN1_BOOLEAN) 235 { 236 int ii; 237 238 opp=op; 239 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 240 if (ii < 0) 241 { 242 if (BIO_write(bp,"Bad boolean\n",12) <= 0) 243 goto end; 244 } 245 BIO_printf(bp,":%d",ii); 246 } 247 else if (tag == V_ASN1_BMPSTRING) 248 { 249 /* do the BMP thang */ 250 } 251 else if (tag == V_ASN1_OCTET_STRING) 252 { 253 int i,printable=1; 254 255 opp=op; 256 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 257 if (os != NULL && os->length > 0) 258 { 259 opp = os->data; 260 /* testing whether the octet string is 261 * printable */ 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) 275 /* printable string */ 276 { 277 if (BIO_write(bp,":",1) <= 0) 278 goto end; 279 if (BIO_write(bp,(const char *)opp, 280 os->length) <= 0) 281 goto end; 282 } 283 else if (!dump) 284 /* not printable => print octet string 285 * as hex dump */ 286 { 287 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0) 288 goto end; 289 for (i=0; i<os->length; i++) 290 { 291 if (BIO_printf(bp,"%02X" 292 , opp[i]) <= 0) 293 goto end; 294 } 295 } 296 else 297 /* print the normal dump */ 298 { 299 if (!nl) 300 { 301 if (BIO_write(bp,"\n",1) <= 0) 302 goto end; 303 } 304 if (BIO_dump_indent(bp, 305 (const char *)opp, 306 ((dump == -1 || dump > 307 os->length)?os->length:dump), 308 dump_indent) <= 0) 309 goto end; 310 nl=1; 311 } 312 } 313 if (os != NULL) 314 { 315 M_ASN1_OCTET_STRING_free(os); 316 os=NULL; 317 } 318 } 319 else if (tag == V_ASN1_INTEGER) 320 { 321 ASN1_INTEGER *bs; 322 int i; 323 324 opp=op; 325 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 326 if (bs != NULL) 327 { 328 if (BIO_write(bp,":",1) <= 0) goto end; 329 if (bs->type == V_ASN1_NEG_INTEGER) 330 if (BIO_write(bp,"-",1) <= 0) 331 goto end; 332 for (i=0; i<bs->length; i++) 333 { 334 if (BIO_printf(bp,"%02X", 335 bs->data[i]) <= 0) 336 goto end; 337 } 338 if (bs->length == 0) 339 { 340 if (BIO_write(bp,"00",2) <= 0) 341 goto end; 342 } 343 } 344 else 345 { 346 if (BIO_write(bp,"BAD INTEGER",11) <= 0) 347 goto end; 348 } 349 M_ASN1_INTEGER_free(bs); 350 } 351 else if (tag == V_ASN1_ENUMERATED) 352 { 353 ASN1_ENUMERATED *bs; 354 int i; 355 356 opp=op; 357 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 358 if (bs != NULL) 359 { 360 if (BIO_write(bp,":",1) <= 0) goto end; 361 if (bs->type == V_ASN1_NEG_ENUMERATED) 362 if (BIO_write(bp,"-",1) <= 0) 363 goto end; 364 for (i=0; i<bs->length; i++) 365 { 366 if (BIO_printf(bp,"%02X", 367 bs->data[i]) <= 0) 368 goto end; 369 } 370 if (bs->length == 0) 371 { 372 if (BIO_write(bp,"00",2) <= 0) 373 goto end; 374 } 375 } 376 else 377 { 378 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) 379 goto end; 380 } 381 M_ASN1_ENUMERATED_free(bs); 382 } 383 else if (len > 0 && dump) 384 { 385 if (!nl) 386 { 387 if (BIO_write(bp,"\n",1) <= 0) 388 goto end; 389 } 390 if (BIO_dump_indent(bp,(const char *)p, 391 ((dump == -1 || dump > len)?len:dump), 392 dump_indent) <= 0) 393 goto end; 394 nl=1; 395 } 396 397 if (!nl) 398 { 399 if (BIO_write(bp,"\n",1) <= 0) goto end; 400 } 401 p+=len; 402 if ((tag == V_ASN1_EOC) && (xclass == 0)) 403 { 404 ret=2; /* End of sequence */ 405 goto end; 406 } 407 } 408 length-=len; 409 } 410 ret=1; 411end: 412 if (o != NULL) ASN1_OBJECT_free(o); 413 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 414 *pp=p; 415 return(ret); 416 } 417 418const char *ASN1_tag2str(int tag) 419{ 420 static const char * const tag2str[] = { 421 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ 422 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ 423 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ 424 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ 425 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ 426 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ 427 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ 428 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ 429 }; 430 431 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) 432 tag &= ~0x100; 433 434 if(tag < 0 || tag > 30) return "(unknown)"; 435 return tag2str[tag]; 436} 437 438