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