asn1pars.c revision 100936
1/* apps/asn1pars.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/* A nice addition from Dr Stephen Henson <shenson@bigfoot.com> to 60 * add the -strparse option which parses nested binary structures 61 */ 62 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include "apps.h" 67#include <openssl/err.h> 68#include <openssl/evp.h> 69#include <openssl/x509.h> 70#include <openssl/pem.h> 71 72/* -inform arg - input format - default PEM (DER or PEM) 73 * -in arg - input file - default stdin 74 * -i - indent the details by depth 75 * -offset - where in the file to start 76 * -length - how many bytes to use 77 * -oid file - extra oid description file 78 */ 79 80#undef PROG 81#define PROG asn1parse_main 82 83int MAIN(int, char **); 84 85int MAIN(int argc, char **argv) 86 { 87 int i,badops=0,offset=0,ret=1,j; 88 unsigned int length=0; 89 long num,tmplen; 90 BIO *in=NULL,*out=NULL,*b64=NULL, *derout = NULL; 91 int informat,indent=0, noout = 0, dump = 0; 92 char *infile=NULL,*str=NULL,*prog,*oidfile=NULL, *derfile=NULL; 93 unsigned char *tmpbuf; 94 BUF_MEM *buf=NULL; 95 STACK *osk=NULL; 96 ASN1_TYPE *at=NULL; 97 98 informat=FORMAT_PEM; 99 100 apps_startup(); 101 102 if (bio_err == NULL) 103 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 104 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 105 106 prog=argv[0]; 107 argc--; 108 argv++; 109 if ((osk=sk_new_null()) == NULL) 110 { 111 BIO_printf(bio_err,"Memory allocation failure\n"); 112 goto end; 113 } 114 while (argc >= 1) 115 { 116 if (strcmp(*argv,"-inform") == 0) 117 { 118 if (--argc < 1) goto bad; 119 informat=str2fmt(*(++argv)); 120 } 121 else if (strcmp(*argv,"-in") == 0) 122 { 123 if (--argc < 1) goto bad; 124 infile= *(++argv); 125 } 126 else if (strcmp(*argv,"-out") == 0) 127 { 128 if (--argc < 1) goto bad; 129 derfile= *(++argv); 130 } 131 else if (strcmp(*argv,"-i") == 0) 132 { 133 indent=1; 134 } 135 else if (strcmp(*argv,"-noout") == 0) noout = 1; 136 else if (strcmp(*argv,"-oid") == 0) 137 { 138 if (--argc < 1) goto bad; 139 oidfile= *(++argv); 140 } 141 else if (strcmp(*argv,"-offset") == 0) 142 { 143 if (--argc < 1) goto bad; 144 offset= atoi(*(++argv)); 145 } 146 else if (strcmp(*argv,"-length") == 0) 147 { 148 if (--argc < 1) goto bad; 149 length= atoi(*(++argv)); 150 if (length == 0) goto bad; 151 } 152 else if (strcmp(*argv,"-dump") == 0) 153 { 154 dump= -1; 155 } 156 else if (strcmp(*argv,"-dlimit") == 0) 157 { 158 if (--argc < 1) goto bad; 159 dump= atoi(*(++argv)); 160 if (dump <= 0) goto bad; 161 } 162 else if (strcmp(*argv,"-strparse") == 0) 163 { 164 if (--argc < 1) goto bad; 165 sk_push(osk,*(++argv)); 166 } 167 else 168 { 169 BIO_printf(bio_err,"unknown option %s\n",*argv); 170 badops=1; 171 break; 172 } 173 argc--; 174 argv++; 175 } 176 177 if (badops) 178 { 179bad: 180 BIO_printf(bio_err,"%s [options] <infile\n",prog); 181 BIO_printf(bio_err,"where options are\n"); 182 BIO_printf(bio_err," -inform arg input format - one of DER TXT PEM\n"); 183 BIO_printf(bio_err," -in arg input file\n"); 184 BIO_printf(bio_err," -out arg output file (output format is always DER\n"); 185 BIO_printf(bio_err," -noout arg don't produce any output\n"); 186 BIO_printf(bio_err," -offset arg offset into file\n"); 187 BIO_printf(bio_err," -length arg length of section in file\n"); 188 BIO_printf(bio_err," -i indent entries\n"); 189 BIO_printf(bio_err," -dump dump unknown data in hex form\n"); 190 BIO_printf(bio_err," -dlimit arg dump the first arg bytes of unknown data in hex form\n"); 191 BIO_printf(bio_err," -oid file file of extra oid definitions\n"); 192 BIO_printf(bio_err," -strparse offset\n"); 193 BIO_printf(bio_err," a series of these can be used to 'dig' into multiple\n"); 194 BIO_printf(bio_err," ASN1 blob wrappings\n"); 195 goto end; 196 } 197 198 ERR_load_crypto_strings(); 199 200 in=BIO_new(BIO_s_file()); 201 out=BIO_new(BIO_s_file()); 202 if ((in == NULL) || (out == NULL)) 203 { 204 ERR_print_errors(bio_err); 205 goto end; 206 } 207 BIO_set_fp(out,stdout,BIO_NOCLOSE|BIO_FP_TEXT); 208#ifdef VMS 209 { 210 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 211 out = BIO_push(tmpbio, out); 212 } 213#endif 214 215 if (oidfile != NULL) 216 { 217 if (BIO_read_filename(in,oidfile) <= 0) 218 { 219 BIO_printf(bio_err,"problems opening %s\n",oidfile); 220 ERR_print_errors(bio_err); 221 goto end; 222 } 223 OBJ_create_objects(in); 224 } 225 226 if (infile == NULL) 227 BIO_set_fp(in,stdin,BIO_NOCLOSE); 228 else 229 { 230 if (BIO_read_filename(in,infile) <= 0) 231 { 232 perror(infile); 233 goto end; 234 } 235 } 236 237 if (derfile) { 238 if(!(derout = BIO_new_file(derfile, "wb"))) { 239 BIO_printf(bio_err,"problems opening %s\n",derfile); 240 ERR_print_errors(bio_err); 241 goto end; 242 } 243 } 244 245 if ((buf=BUF_MEM_new()) == NULL) goto end; 246 if (!BUF_MEM_grow(buf,BUFSIZ*8)) goto end; /* Pre-allocate :-) */ 247 248 if (informat == FORMAT_PEM) 249 { 250 BIO *tmp; 251 252 if ((b64=BIO_new(BIO_f_base64())) == NULL) 253 goto end; 254 BIO_push(b64,in); 255 tmp=in; 256 in=b64; 257 b64=tmp; 258 } 259 260 num=0; 261 for (;;) 262 { 263 if (!BUF_MEM_grow(buf,(int)num+BUFSIZ)) goto end; 264 i=BIO_read(in,&(buf->data[num]),BUFSIZ); 265 if (i <= 0) break; 266 num+=i; 267 } 268 str=buf->data; 269 270 /* If any structs to parse go through in sequence */ 271 272 if (sk_num(osk)) 273 { 274 tmpbuf=(unsigned char *)str; 275 tmplen=num; 276 for (i=0; i<sk_num(osk); i++) 277 { 278 ASN1_TYPE *atmp; 279 j=atoi(sk_value(osk,i)); 280 if (j == 0) 281 { 282 BIO_printf(bio_err,"'%s' is an invalid number\n",sk_value(osk,i)); 283 continue; 284 } 285 tmpbuf+=j; 286 tmplen-=j; 287 atmp = at; 288 at = d2i_ASN1_TYPE(NULL,&tmpbuf,tmplen); 289 ASN1_TYPE_free(atmp); 290 if(!at) 291 { 292 BIO_printf(bio_err,"Error parsing structure\n"); 293 ERR_print_errors(bio_err); 294 goto end; 295 } 296 /* hmm... this is a little evil but it works */ 297 tmpbuf=at->value.asn1_string->data; 298 tmplen=at->value.asn1_string->length; 299 } 300 str=(char *)tmpbuf; 301 num=tmplen; 302 } 303 304 if (length == 0) length=(unsigned int)num; 305 if(derout) { 306 if(BIO_write(derout, str + offset, length) != (int)length) { 307 BIO_printf(bio_err, "Error writing output\n"); 308 ERR_print_errors(bio_err); 309 goto end; 310 } 311 } 312 if (!noout && 313 !ASN1_parse_dump(out,(unsigned char *)&(str[offset]),length, 314 indent,dump)) 315 { 316 ERR_print_errors(bio_err); 317 goto end; 318 } 319 ret=0; 320end: 321 BIO_free(derout); 322 if (in != NULL) BIO_free(in); 323 if (out != NULL) BIO_free_all(out); 324 if (b64 != NULL) BIO_free(b64); 325 if (ret != 0) 326 ERR_print_errors(bio_err); 327 if (buf != NULL) BUF_MEM_free(buf); 328 if (at != NULL) ASN1_TYPE_free(at); 329 if (osk != NULL) sk_free(osk); 330 OBJ_cleanup(); 331 EXIT(ret); 332 } 333 334