asn1_par.c revision 59191
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); 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 if (indent) 83 { 84 if (indent > 128) indent=128; 85 memset(str,' ',indent); 86 if (BIO_write(bp,str,indent) < indent) goto err; 87 } 88 89 p=str; 90 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) 91 sprintf(str,"priv [ %d ] ",tag); 92 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) 93 sprintf(str,"cont [ %d ]",tag); 94 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) 95 sprintf(str,"appl [ %d ]",tag); 96 else p = ASN1_tag2str(tag); 97 98 if (p2 != NULL) 99 { 100 if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err; 101 } 102 else 103 { 104 if (BIO_printf(bp,fmt,p) <= 0) goto err; 105 } 106 return(1); 107err: 108 return(0); 109 } 110 111int ASN1_parse(BIO *bp, unsigned char *pp, long len, int indent) 112 { 113 return(asn1_parse2(bp,&pp,len,0,0,indent)); 114 } 115 116static int asn1_parse2(BIO *bp, unsigned char **pp, long length, int offset, 117 int depth, int indent) 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;*/ 126 127 p= *pp; 128 tot=p+length; 129 op=p-1; 130 while ((p < tot) && (op < p)) 131 { 132 op=p; 133 j=ASN1_get_object(&p,&len,&tag,&xclass,length); 134#ifdef LINT 135 j=j; 136#endif 137 if (j & 0x80) 138 { 139 if (BIO_write(bp,"Error in encoding\n",18) <= 0) 140 goto end; 141 ret=0; 142 goto end; 143 } 144 hl=(p-op); 145 length-=hl; 146 /* if j == 0x21 it is a constructed indefinite length object */ 147 if (BIO_printf(bp,"%5ld:",(long)offset+(long)(op- *pp)) 148 <= 0) goto end; 149 150 if (j != (V_ASN1_CONSTRUCTED | 1)) 151 { 152 if (BIO_printf(bp,"d=%-2d hl=%ld l=%4ld ", 153 depth,(long)hl,len) <= 0) 154 goto end; 155 } 156 else 157 { 158 if (BIO_printf(bp,"d=%-2d hl=%ld l=inf ", 159 depth,(long)hl) <= 0) 160 goto end; 161 } 162 if (!asn1_print_info(bp,tag,xclass,j,(indent)?depth:0)) 163 goto end; 164 if (j & V_ASN1_CONSTRUCTED) 165 { 166 ep=p+len; 167 if (BIO_write(bp,"\n",1) <= 0) goto end; 168 if (len > length) 169 { 170 BIO_printf(bp, 171 "length is greater than %ld\n",length); 172 ret=0; 173 goto end; 174 } 175 if ((j == 0x21) && (len == 0)) 176 { 177 for (;;) 178 { 179 r=asn1_parse2(bp,&p,(long)(tot-p), 180 offset+(p - *pp),depth+1, 181 indent); 182 if (r == 0) { ret=0; goto end; } 183 if ((r == 2) || (p >= tot)) break; 184 } 185 } 186 else 187 while (p < ep) 188 { 189 r=asn1_parse2(bp,&p,(long)len, 190 offset+(p - *pp),depth+1, 191 indent); 192 if (r == 0) { ret=0; goto end; } 193 } 194 } 195 else if (xclass != 0) 196 { 197 p+=len; 198 if (BIO_write(bp,"\n",1) <= 0) goto end; 199 } 200 else 201 { 202 nl=0; 203 if ( (tag == V_ASN1_PRINTABLESTRING) || 204 (tag == V_ASN1_T61STRING) || 205 (tag == V_ASN1_IA5STRING) || 206 (tag == V_ASN1_VISIBLESTRING) || 207 (tag == V_ASN1_UTCTIME) || 208 (tag == V_ASN1_GENERALIZEDTIME)) 209 { 210 if (BIO_write(bp,":",1) <= 0) goto end; 211 if ((len > 0) && 212 BIO_write(bp,(char *)p,(int)len) 213 != (int)len) 214 goto end; 215 } 216 else if (tag == V_ASN1_OBJECT) 217 { 218 opp=op; 219 if (d2i_ASN1_OBJECT(&o,&opp,len+hl) != NULL) 220 { 221 if (BIO_write(bp,":",1) <= 0) goto end; 222 i2a_ASN1_OBJECT(bp,o); 223 } 224 else 225 { 226 if (BIO_write(bp,":BAD OBJECT",11) <= 0) 227 goto end; 228 } 229 } 230 else if (tag == V_ASN1_BOOLEAN) 231 { 232 int ii; 233 234 opp=op; 235 ii=d2i_ASN1_BOOLEAN(NULL,&opp,len+hl); 236 if (ii < 0) 237 { 238 if (BIO_write(bp,"Bad boolean\n",12)) 239 goto end; 240 } 241 BIO_printf(bp,":%d",ii); 242 } 243 else if (tag == V_ASN1_BMPSTRING) 244 { 245 /* do the BMP thang */ 246 } 247 else if (tag == V_ASN1_OCTET_STRING) 248 { 249 int i,printable=1; 250 251 opp=op; 252 os=d2i_ASN1_OCTET_STRING(NULL,&opp,len+hl); 253 if (os != NULL) 254 { 255 opp=os->data; 256 for (i=0; i<os->length; i++) 257 { 258 if (( (opp[i] < ' ') && 259 (opp[i] != '\n') && 260 (opp[i] != '\r') && 261 (opp[i] != '\t')) || 262 (opp[i] > '~')) 263 { 264 printable=0; 265 break; 266 } 267 } 268 if (printable && (os->length > 0)) 269 { 270 if (BIO_write(bp,":",1) <= 0) 271 goto end; 272 if (BIO_write(bp,(char *)opp, 273 os->length) <= 0) 274 goto end; 275 } 276 M_ASN1_OCTET_STRING_free(os); 277 os=NULL; 278 } 279 } 280 else if (tag == V_ASN1_INTEGER) 281 { 282 ASN1_INTEGER *bs; 283 int i; 284 285 opp=op; 286 bs=d2i_ASN1_INTEGER(NULL,&opp,len+hl); 287 if (bs != NULL) 288 { 289 if (BIO_write(bp,":",1) <= 0) goto end; 290 if (bs->type == V_ASN1_NEG_INTEGER) 291 if (BIO_write(bp,"-",1) <= 0) 292 goto end; 293 for (i=0; i<bs->length; i++) 294 { 295 if (BIO_printf(bp,"%02X", 296 bs->data[i]) <= 0) 297 goto end; 298 } 299 if (bs->length == 0) 300 { 301 if (BIO_write(bp,"00",2) <= 0) 302 goto end; 303 } 304 } 305 else 306 { 307 if (BIO_write(bp,"BAD INTEGER",11) <= 0) 308 goto end; 309 } 310 M_ASN1_INTEGER_free(bs); 311 } 312 else if (tag == V_ASN1_ENUMERATED) 313 { 314 ASN1_ENUMERATED *bs; 315 int i; 316 317 opp=op; 318 bs=d2i_ASN1_ENUMERATED(NULL,&opp,len+hl); 319 if (bs != NULL) 320 { 321 if (BIO_write(bp,":",1) <= 0) goto end; 322 if (bs->type == V_ASN1_NEG_ENUMERATED) 323 if (BIO_write(bp,"-",1) <= 0) 324 goto end; 325 for (i=0; i<bs->length; i++) 326 { 327 if (BIO_printf(bp,"%02X", 328 bs->data[i]) <= 0) 329 goto end; 330 } 331 if (bs->length == 0) 332 { 333 if (BIO_write(bp,"00",2) <= 0) 334 goto end; 335 } 336 } 337 else 338 { 339 if (BIO_write(bp,"BAD ENUMERATED",11) <= 0) 340 goto end; 341 } 342 M_ASN1_ENUMERATED_free(bs); 343 } 344 345 if (!nl) 346 { 347 if (BIO_write(bp,"\n",1) <= 0) goto end; 348 } 349 p+=len; 350 if ((tag == V_ASN1_EOC) && (xclass == 0)) 351 { 352 ret=2; /* End of sequence */ 353 goto end; 354 } 355 } 356 length-=len; 357 } 358 ret=1; 359end: 360 if (o != NULL) ASN1_OBJECT_free(o); 361 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 362 *pp=p; 363 return(ret); 364 } 365 366const char *ASN1_tag2str(int tag) 367{ 368 const static char *tag2str[] = { 369 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ 370 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ 371 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ 372 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ 373 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ 374 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME","GENERALIZEDTIME", /* 21-24 */ 375 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ 376 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ 377 }; 378 379 if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) 380 tag &= ~0x100; 381 382 if(tag < 0 || tag > 30) return "(unknown)"; 383 return tag2str[tag]; 384} 385 386