Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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, const 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 | 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); |
| 98 | err: |
| 99 | return(0); |
| 100 | } |
| 101 | |
| 102 | int 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 | |
| 107 | int 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 | |
| 112 | static 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; |
| 411 | end: |
| 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 | |
| 418 | const 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 | |