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