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 64static int asn1_print_info(BIO *bp, int tag, int xclass,int constructed, 65 int indent); 66static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, 67 int offset, int depth, int indent, int dump); 68static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, 69 int indent) 70 { 71 static const char fmt[]="%-18s"; 72 char str[128]; 73 const char *p; 74 75 if (constructed & V_ASN1_CONSTRUCTED) 76 p="cons: "; 77 else 78 p="prim: "; 79 if (BIO_write(bp,p,6) < 6) goto err; 80 BIO_indent(bp,indent,128); 81 82 p=str; 83 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) 84 BIO_snprintf(str,sizeof str,"priv [ %d ] ",tag); 85 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) 86 BIO_snprintf(str,sizeof str,"cont [ %d ]",tag); 87 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) 88 BIO_snprintf(str,sizeof str,"appl [ %d ]",tag); 89 else if (tag > 30) 90 BIO_snprintf(str,sizeof str,"<ASN1 %d>",tag); 91 else 92 p = ASN1_tag2str(tag); 93 94 if (BIO_printf(bp,fmt,p) <= 0) 95 goto err; 96 return(1); 97err: 98 return(0); 99 } 100 101int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) 102 { 103 return(asn1_parse2(bp,&pp,len,0,0,indent,0)); 104 } 105 106int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) 107 { 108 return(asn1_parse2(bp,&pp,len,0,0,indent,dump)); 109 } 110 111static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, 112 int depth, int indent, int dump) 113 { 114 const unsigned char *p,*ep,*tot,*op,*opp; 115 long len; 116 int tag,xclass,ret=0; 117 int nl,hl,j,r; 118 ASN1_OBJECT *o=NULL; 119 ASN1_OCTET_STRING *os=NULL; 120 /* ASN1_BMPSTRING *bmp=NULL;*/ 121 int dump_indent; 122 123#if 0 124 dump_indent = indent; 125#else 126 dump_indent = 6; /* Because we know BIO_dump_indent() */ 127#endif 128 p= *pp; 129 tot=p+length; 130 op=p-1; 131 while ((p < tot) && (op < p)) 132 { 133 op=p; 134 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 135#ifdef LINT 136 j=j; 137#endif 138 if (j & 0x80) 139 { 140 if (BIO_write(bp,"Error in encoding\n",18) <= 0) 141 goto end; 142 ret=0; 143 goto end; 144 } 145 hl=(p-op); 146 length-=hl; 147 /* if j == 0x21 it is a constructed indefinite length object */ 148 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 149 <= 0) goto end; 150 151 if (j != (V_ASN1_CONSTRUCTED | 1)) 152 { 153 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 154 depth,(long)hl,len) <= 0) 155 goto end; 156 } 157 else 158 { 159 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 160 depth,(long)hl) <= 0) 161 goto end; 162 } 163 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 164 goto end; 165 if (j & V_ASN1_CONSTRUCTED) 166 { 167 ep=p+len; 168 if (BIO_write(bp,"\n",1) <= 0) goto end; 169 if (len > length) 170 { 171 BIO_printf(bp, 172 "length is greater than %ld\n",length); 173 ret=0; 174 goto end; 175 } 176 if ((j == 0x21) && (len == 0)) 177 { 178 for (;;) 179 { 180 r=asn1_parse2(bp,&p,(long)(tot-p), 181 offset+(p - *pp),depth+1, 182 indent,dump); 183 if (r == 0) { ret=0; goto end; } 184 if ((r == 2) || (p >= tot)) break; 185 } 186 } 187 else 188 while (p < ep) 189 { 190 r=asn1_parse2(bp,&p,(long)len, 191 offset+(p - *pp),depth+1, 192 indent,dump); 193 if (r == 0) { ret=0; goto end; } 194 } 195 } 196 else if (xclass != 0) 197 { 198 p+=len; 199 if (BIO_write(bp,"\n",1) <= 0) goto end; 200 } 201 else 202 { 203 nl=0; 204 if ( (tag == V_ASN1_PRINTABLESTRING) || 205 (tag == V_ASN1_T61STRING) || 206 (tag == V_ASN1_IA5STRING) || 207 (tag == V_ASN1_VISIBLESTRING) || 208 (tag == V_ASN1_NUMERICSTRING) || 209 (tag == V_ASN1_UTF8STRING) || 210 (tag == V_ASN1_UTCTIME) || 211 (tag == V_ASN1_GENERALIZEDTIME)) 212 { 213 if (BIO_write(bp,":",1) <= 0) goto end; 214 if ((len > 0) && 215 BIO_write(bp,(const char *)p,(int)len) 216 != (int)len) 217 goto end; 218 } 219 else if (tag == V_ASN1_OBJECT) 220 { 221 opp=op; 222 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 223 { 224 if (BIO_write(bp,":",1) <= 0) goto end; 225 i2a_ASN1_OBJECT(bp,o); 226 } 227 else 228 { 229 if (BIO_write(bp,":BAD OBJECT",11) <= 0) 230 goto end; 231 } 232 } 233 else if (tag == V_ASN1_BOOLEAN) 234 { 235 int ii; 236 237 opp=op; 238 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 239 if (ii < 0) 240 { 241 if (BIO_write(bp,"Bad boolean\n",12) <= 0) 242 goto end; 243 } 244 BIO_printf(bp,":%d",ii); 245 } 246 else if (tag == V_ASN1_BMPSTRING) 247 { 248 /* do the BMP thang */ 249 } 250 else if (tag == V_ASN1_OCTET_STRING) 251 { 252 int i,printable=1; 253 254 opp=op; 255 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 256 if (os != NULL && os->length > 0) 257 { 258 opp = os->data; 259 /* testing whether the octet string is 260 * printable */ 261 for (i=0; i<os->length; i++) 262 { 263 if (( (opp[i] < ' ') && 264 (opp[i] != '\n') && 265 (opp[i] != '\r') && 266 (opp[i] != '\t')) || 267 (opp[i] > '~')) 268 { 269 printable=0; 270 break; 271 } 272 } 273 if (printable) 274 /* printable string */ 275 { 276 if (BIO_write(bp,":",1) <= 0) 277 goto end; 278 if (BIO_write(bp,(const char *)opp, 279 os->length) <= 0) 280 goto end; 281 } 282 else if (!dump) 283 /* not printable => print octet string 284 * as hex dump */ 285 { 286 if (BIO_write(bp,"[HEX DUMP]:",11) <= 0) 287 goto end; 288 for (i=0; i<os->length; i++) 289 { 290 if (BIO_printf(bp,"%02X" 291 , opp[i]) <= 0) 292 goto end; 293 } 294 } 295 else 296 /* print the normal dump */ 297 { 298 if (!nl) 299 { 300 if (BIO_write(bp,"\n",1) <= 0) 301 goto end; 302 } 303 if (!BIO_hexdump(bp, opp, 304 ((dump == -1 || dump > 305 os->length)?os->length:dump), 306 dump_indent)) 307 goto end; 308 nl=1; 309 } 310 } 311 if (os != NULL) 312 { 313 M_ASN1_OCTET_STRING_free(os); 314 os=NULL; 315 } 316 } 317 else if (tag == V_ASN1_INTEGER) 318 { 319 ASN1_INTEGER *bs; 320 int i; 321 322 opp=op; 323 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 324 if (bs != NULL) 325 { 326 if (BIO_write(bp,":",1) <= 0) goto end; 327 if (bs->type == V_ASN1_NEG_INTEGER) 328 if (BIO_write(bp,"-",1) <= 0) 329 goto end; 330 for (i=0; i<bs->length; i++) 331 { 332 if (BIO_printf(bp,"%02X", 333 bs->data[i]) <= 0) 334 goto end; 335 } 336 if (bs->length == 0) 337 { 338 if (BIO_write(bp,"00",2) <= 0) 339 goto end; 340 } 341 } 342 else 343 { 344 if (BIO_write(bp,"BAD INTEGER",11) <= 0) 345 goto end; 346 } 347 M_ASN1_INTEGER_free(bs); 348 } 349 else if (tag == V_ASN1_ENUMERATED) 350 { 351 ASN1_ENUMERATED *bs; 352 int i; 353 354 opp=op; 355 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 356 if (bs != NULL) 357 { 358 if (BIO_write(bp,":",1) <= 0) goto end; 359 if (bs->type == V_ASN1_NEG_ENUMERATED) 360 if (BIO_write(bp,"-",1) <= 0) 361 goto end; 362 for (i=0; i<bs->length; i++) 363 { 364 if (BIO_printf(bp,"%02X", 365 bs->data[i]) <= 0) 366 goto end; 367 } 368 if (bs->length == 0) 369 { 370 if (BIO_write(bp,"00",2) <= 0) 371 goto end; 372 } 373 } 374 else 375 { 376 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) 377 goto end; 378 } 379 M_ASN1_ENUMERATED_free(bs); 380 } 381 else if (len > 0 && dump) 382 { 383 if (!nl) 384 { 385 if (BIO_write(bp,"\n",1) <= 0) 386 goto end; 387 } 388 if (!BIO_hexdump(bp,p, 389 ((dump == -1 || dump > len)?len:dump), 390 dump_indent)) 391 goto end; 392 nl=1; 393 } 394 395 if (!nl) 396 { 397 if (BIO_write(bp,"\n",1) <= 0) goto end; 398 } 399 p+=len; 400 if ((tag == V_ASN1_EOC) && (xclass == 0)) 401 { 402 ret=2; /* End of sequence */ 403 goto end; 404 } 405 } 406 length-=len; 407 } 408 ret=1; 409end: 410 if (o != NULL) ASN1_OBJECT_free(o); 411 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 412 *pp=p; 413 return(ret); 414 } 415 416const char *ASN1_tag2str(int tag) 417{ 418 static const char * const tag2str[] = { 419 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ 420 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ 421 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ 422 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ 423 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ 424 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ 425 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ 426 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ 427 }; 428 429 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) 430 tag &= ~0x100; 431 432 if(tag < 0 || tag > 30) return "(unknown)"; 433 return tag2str[tag]; 434} 435 436