1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay@cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57#include <openssl/asn1.h> 58 59#include <openssl/bio.h> 60#include <openssl/err.h> 61#include <openssl/mem.h> 62 63 64#define ASN1_PARSE_MAXDEPTH 128 65 66static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed, 67 int indent); 68static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, 69 int offset, int depth, int indent, int dump); 70static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, 71 int indent) 72 { 73 static const char fmt[]="%-18s"; 74 char str[128]; 75 const char *p; 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 (BIO_printf(bp,fmt,p) <= 0) 97 goto err; 98 return(1); 99err: 100 return(0); 101 } 102 103int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) 104 { 105 return(asn1_parse2(bp,&pp,len,0,0,indent,0)); 106 } 107 108int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) 109 { 110 return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); 111 } 112 113static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, 114 int depth, int indent, int dump) 115 { 116 const unsigned char *p,*ep,*tot,*op,*opp; 117 long len; 118 int tag,xclass,ret=0; 119 int nl,hl,j,r; 120 ASN1_OBJECT *o=NULL; 121 ASN1_OCTET_STRING *os=NULL; 122 /* ASN1_BMPSTRING *bmp=NULL;*/ 123 int dump_indent; 124 125#if 0 126 dump_indent = indent; 127#else 128 dump_indent = 6; /* Because we know BIO_dump_indent() */ 129#endif 130 131 if (depth > ASN1_PARSE_MAXDEPTH) 132 { 133 BIO_puts(bp, "BAD RECURSION DEPTH\n"); 134 return 0; 135 } 136 137 p= *pp; 138 tot=p+length; 139 op=p-1; 140 while ((p < tot) && (op < p)) 141 { 142 op=p; 143 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 144#ifdef LINT 145 j=j; 146#endif 147 if (j & 0x80) 148 { 149 if (BIO_puts(bp, "Error in encoding\n") <= 0) 150 goto end; 151 ret=0; 152 goto end; 153 } 154 hl=(p-op); 155 length-=hl; 156 /* if j == 0x21 it is a constructed indefinite length object */ 157 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 158 <= 0) goto end; 159 160 if (j != (V_ASN1_CONSTRUCTED | 1)) 161 { 162 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 163 depth,(long)hl,len) <= 0) 164 goto end; 165 } 166 else 167 { 168 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 169 depth,(long)hl) <= 0) 170 goto end; 171 } 172 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 173 goto end; 174 if (j & V_ASN1_CONSTRUCTED) 175 { 176 ep=p+len; 177 if (BIO_puts(bp, "\n") <= 0) goto end; 178 if (len > length) 179 { 180 BIO_printf(bp, 181 "length is greater than %ld\n",length); 182 ret=0; 183 goto end; 184 } 185 if ((j == 0x21) && (len == 0)) 186 { 187 for (;;) 188 { 189 r=asn1_parse2(bp,&p,(long)(tot-p), 190 offset+(p - *pp),depth+1, 191 indent,dump); 192 if (r == 0) { ret=0; goto end; } 193 if ((r == 2) || (p >= tot)) break; 194 } 195 } 196 else 197 while (p < ep) 198 { 199 r=asn1_parse2(bp,&p,(long)len, 200 offset+(p - *pp),depth+1, 201 indent,dump); 202 if (r == 0) { ret=0; goto end; } 203 } 204 } 205 else if (xclass != 0) 206 { 207 p+=len; 208 if (BIO_puts(bp, "\n") <= 0) goto end; 209 } 210 else 211 { 212 nl=0; 213 if ( (tag == V_ASN1_PRINTABLESTRING) || 214 (tag == V_ASN1_T61STRING) || 215 (tag == V_ASN1_IA5STRING) || 216 (tag == V_ASN1_VISIBLESTRING) || 217 (tag == V_ASN1_NUMERICSTRING) || 218 (tag == V_ASN1_UTF8STRING) || 219 (tag == V_ASN1_UTCTIME) || 220 (tag == V_ASN1_GENERALIZEDTIME)) 221 { 222 if (BIO_puts(bp, ":") <= 0) goto end; 223 if ((len > 0) && 224 BIO_write(bp,(const char *)p,(int)len) 225 != (int)len) 226 goto end; 227 } 228 else if (tag == V_ASN1_OBJECT) 229 { 230 opp=op; 231 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 232 { 233 if (BIO_puts(bp, ":") <= 0) goto end; 234 i2a_ASN1_OBJECT(bp,o); 235 } 236 else 237 { 238 if (BIO_puts(bp, ":BAD OBJECT") <= 0) 239 goto end; 240 } 241 } 242 else if (tag == V_ASN1_BOOLEAN) 243 { 244 int ii; 245 246 opp=op; 247 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 248 if (ii < 0) 249 { 250 if (BIO_puts(bp, "Bad boolean\n") <= 0) 251 goto end; 252 } 253 BIO_printf(bp,":%d",ii); 254 } 255 else if (tag == V_ASN1_BMPSTRING) 256 { 257 /* do the BMP thang */ 258 } 259 else if (tag == V_ASN1_OCTET_STRING) 260 { 261 int i,printable=1; 262 263 opp=op; 264 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 265 if (os != NULL && os->length > 0) 266 { 267 opp = os->data; 268 /* testing whether the octet string is 269 * printable */ 270 for (i=0; i<os->length; i++) 271 { 272 if (( (opp[i] < ' ') && 273 (opp[i] != '\n') && 274 (opp[i] != '\r') && 275 (opp[i] != '\t')) || 276 (opp[i] > '~')) 277 { 278 printable=0; 279 break; 280 } 281 } 282 if (printable) 283 /* printable string */ 284 { 285 if (BIO_puts(bp, ":") <= 0) 286 goto end; 287 if (BIO_write(bp,(const char *)opp, 288 os->length) <= 0) 289 goto end; 290 } 291 else if (!dump) 292 /* not printable => print octet string 293 * as hex dump */ 294 { 295 if (BIO_puts(bp, "[HEX DUMP]:") <= 0) 296 goto end; 297 for (i=0; i<os->length; i++) 298 { 299 if (BIO_printf(bp,"%02X" 300 , opp[i]) <= 0) 301 goto end; 302 } 303 } 304 else 305 /* print the normal dump */ 306 { 307 if (!nl) 308 { 309 if (BIO_puts(bp, "\n") <= 0) 310 goto end; 311 } 312 if (!BIO_hexdump(bp, opp, 313 ((dump == -1 || dump > 314 os->length)?os->length:dump), 315 dump_indent)) 316 goto end; 317 nl=1; 318 } 319 } 320 if (os != NULL) 321 { 322 M_ASN1_OCTET_STRING_free(os); 323 os=NULL; 324 } 325 } 326 else if (tag == V_ASN1_INTEGER) 327 { 328 ASN1_INTEGER *bs; 329 int i; 330 331 opp=op; 332 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 333 if (bs != NULL) 334 { 335 if (BIO_puts(bp, ":") <= 0) goto end; 336 if (bs->type == V_ASN1_NEG_INTEGER) 337 if (BIO_puts(bp, "-") <= 0) 338 goto end; 339 for (i=0; i<bs->length; i++) 340 { 341 if (BIO_printf(bp,"%02X", 342 bs->data[i]) <= 0) 343 goto end; 344 } 345 if (bs->length == 0) 346 { 347 if (BIO_puts(bp, "00") <= 0) 348 goto end; 349 } 350 } 351 else 352 { 353 if (BIO_puts(bp, "BAD INTEGER") <= 0) 354 goto end; 355 } 356 M_ASN1_INTEGER_free(bs); 357 } 358 else if (tag == V_ASN1_ENUMERATED) 359 { 360 ASN1_ENUMERATED *bs; 361 int i; 362 363 opp=op; 364 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 365 if (bs != NULL) 366 { 367 if (BIO_puts(bp, ":") <= 0) goto end; 368 if (bs->type == V_ASN1_NEG_ENUMERATED) 369 if (BIO_puts(bp, "-") <= 0) 370 goto end; 371 for (i=0; i<bs->length; i++) 372 { 373 if (BIO_printf(bp,"%02X", 374 bs->data[i]) <= 0) 375 goto end; 376 } 377 if (bs->length == 0) 378 { 379 if (BIO_puts(bp, "00") <= 0) 380 goto end; 381 } 382 } 383 else 384 { 385 if (BIO_puts(bp, "BAD ENUMERATED") <= 0) 386 goto end; 387 } 388 M_ASN1_ENUMERATED_free(bs); 389 } 390 else if (len > 0 && dump) 391 { 392 if (!nl) 393 { 394 if (BIO_puts(bp, "\n") <= 0) 395 goto end; 396 } 397 if (!BIO_hexdump(bp,p, 398 ((dump == -1 || dump > len)?len:dump), 399 dump_indent)) 400 goto end; 401 nl=1; 402 } 403 404 if (!nl) 405 { 406 if (BIO_puts(bp, "\n") <= 0) goto end; 407 } 408 p+=len; 409 if ((tag == V_ASN1_EOC) && (xclass == 0)) 410 { 411 ret=2; /* End of sequence */ 412 goto end; 413 } 414 } 415 length-=len; 416 } 417 ret=1; 418end: 419 if (o != NULL) ASN1_OBJECT_free(o); 420 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 421 *pp=p; 422 return(ret); 423 } 424 425const char *ASN1_tag2str(int tag) 426{ 427 static const char * const tag2str[] = { 428 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ 429 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ 430 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ 431 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ 432 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ 433 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ 434 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ 435 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ 436 }; 437 438 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) 439 tag &= ~0x100; 440 441 if(tag < 0 || tag > 30) return "(unknown)"; 442 return tag2str[tag]; 443} 444 445