1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
59 * A nice addition from Dr Stephen Henson <steve@openssl.org> to add the
60 * -strparse option which parses nested binary structures
67 #include <openssl/err.h>
68 #include <openssl/evp.h>
69 #include <openssl/x509.h>
70 #include <openssl/pem.h>
72 typedef enum OPTION_choice {
73 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
74 OPT_INFORM, OPT_IN, OPT_OUT, OPT_INDENT, OPT_NOOUT,
75 OPT_OID, OPT_OFFSET, OPT_LENGTH, OPT_DUMP, OPT_DLIMIT,
76 OPT_STRPARSE, OPT_GENSTR, OPT_GENCONF, OPT_STRICTPEM
79 OPTIONS asn1parse_options[] = {
80 {"help", OPT_HELP, '-', "Display this summary"},
81 {"inform", OPT_INFORM, 'F', "input format - one of DER PEM"},
82 {"in", OPT_IN, '<', "input file"},
83 {"out", OPT_OUT, '>', "output file (output format is always DER)"},
84 {"i", OPT_INDENT, 0, "entries"},
85 {"noout", OPT_NOOUT, 0, "don't produce any output"},
86 {"offset", OPT_OFFSET, 'p', "offset into file"},
87 {"length", OPT_LENGTH, 'p', "length of section in file"},
88 {"oid", OPT_OID, '<', "file of extra oid definitions"},
89 {"dump", OPT_DUMP, 0, "unknown data in hex form"},
90 {"dlimit", OPT_DLIMIT, 'p',
91 "dump the first arg bytes of unknown data in hex form"},
92 {"strparse", OPT_STRPARSE, 's',
93 "offset; a series of these can be used to 'dig'"},
94 {OPT_MORE_STR, 0, 0, "into multiple ASN1 blob wrappings"},
95 {"genstr", OPT_GENSTR, 's', "string to generate ASN1 structure from"},
96 {"genconf", OPT_GENCONF, 's', "file to generate ASN1 structure from"},
97 {OPT_MORE_STR, 0, 0, "(-inform will be ignored)"},
98 {"strictpem", OPT_STRICTPEM, 0,
99 "do not attempt base64 decode outside PEM markers"},
103 static int do_generate(char *genstr, char *genconf, BUF_MEM *buf);
105 int asn1parse_main(int argc, char **argv)
107 ASN1_TYPE *at = NULL;
108 BIO *in = NULL, *b64 = NULL, *derout = NULL;
110 STACK_OF(OPENSSL_STRING) *osk = NULL;
111 char *genstr = NULL, *genconf = NULL;
112 char *infile = NULL, *str = NULL, *oidfile = NULL, *derfile = NULL;
113 char *name = NULL, *header = NULL, *prog;
114 const unsigned char *ctmpbuf;
115 int indent = 0, noout = 0, dump = 0, strictpem = 0, informat = FORMAT_PEM;
116 int offset = 0, ret = 1, i, j;
118 unsigned char *tmpbuf;
119 unsigned int length = 0;
122 prog = opt_init(argc, argv, asn1parse_options);
124 if ((osk = sk_OPENSSL_STRING_new_null()) == NULL) {
125 BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
129 while ((o = opt_next()) != OPT_EOF) {
134 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
137 opt_help(asn1parse_options);
141 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
160 offset = strtol(opt_arg(), NULL, 0);
163 length = atoi(opt_arg());
169 dump = atoi(opt_arg());
172 sk_OPENSSL_STRING_push(osk, opt_arg());
182 informat = FORMAT_PEM;
186 argc = opt_num_rest();
189 if (oidfile != NULL) {
190 in = bio_open_default(oidfile, 'r', FORMAT_TEXT);
193 OBJ_create_objects(in);
197 if ((in = bio_open_default(infile, 'r', informat)) == NULL)
200 if (derfile && (derout = bio_open_default(derfile, 'w', FORMAT_ASN1)) == NULL)
204 if (PEM_read_bio(in, &name, &header, (unsigned char **)&str, &num) !=
206 BIO_printf(bio_err, "Error reading PEM file\n");
207 ERR_print_errors(bio_err);
212 if ((buf = BUF_MEM_new()) == NULL)
214 if (!BUF_MEM_grow(buf, BUFSIZ * 8))
215 goto end; /* Pre-allocate :-) */
217 if (genstr || genconf) {
218 num = do_generate(genstr, genconf, buf);
220 ERR_print_errors(bio_err);
227 if (informat == FORMAT_PEM) {
230 if ((b64 = BIO_new(BIO_f_base64())) == NULL)
240 if (!BUF_MEM_grow(buf, (int)num + BUFSIZ))
242 i = BIO_read(in, &(buf->data[num]), BUFSIZ);
252 /* If any structs to parse go through in sequence */
254 if (sk_OPENSSL_STRING_num(osk)) {
255 tmpbuf = (unsigned char *)str;
257 for (i = 0; i < sk_OPENSSL_STRING_num(osk); i++) {
260 j = atoi(sk_OPENSSL_STRING_value(osk, i));
262 BIO_printf(bio_err, "'%s' is an invalid number\n",
263 sk_OPENSSL_STRING_value(osk, i));
270 at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
271 ASN1_TYPE_free(atmp);
273 BIO_printf(bio_err, "Error parsing structure\n");
274 ERR_print_errors(bio_err);
277 typ = ASN1_TYPE_get(at);
278 if ((typ == V_ASN1_OBJECT)
279 || (typ == V_ASN1_BOOLEAN)
280 || (typ == V_ASN1_NULL)) {
281 BIO_printf(bio_err, "Can't parse %s type\n", ASN1_tag2str(typ));
282 ERR_print_errors(bio_err);
285 /* hmm... this is a little evil but it works */
286 tmpbuf = at->value.asn1_string->data;
287 tmplen = at->value.asn1_string->length;
289 str = (char *)tmpbuf;
294 BIO_printf(bio_err, "Error: offset too large\n");
300 if ((length == 0) || ((long)length > num))
301 length = (unsigned int)num;
303 if (BIO_write(derout, str + offset, length) != (int)length) {
304 BIO_printf(bio_err, "Error writing output\n");
305 ERR_print_errors(bio_err);
310 !ASN1_parse_dump(bio_out, (unsigned char *)&(str[offset]), length,
312 ERR_print_errors(bio_err);
321 ERR_print_errors(bio_err);
324 OPENSSL_free(header);
328 sk_OPENSSL_STRING_free(osk);
333 static int do_generate(char *genstr, char *genconf, BUF_MEM *buf)
338 ASN1_TYPE *atyp = NULL;
341 if ((cnf = app_load_config(genconf)) == NULL)
344 genstr = NCONF_get_string(cnf, "default", "asn1");
346 BIO_printf(bio_err, "Can't find 'asn1' in '%s'\n", genconf);
351 atyp = ASN1_generate_nconf(genstr, cnf);
358 len = i2d_ASN1_TYPE(atyp, NULL);
363 if (!BUF_MEM_grow(buf, len))
366 p = (unsigned char *)buf->data;
368 i2d_ASN1_TYPE(atyp, &p);
370 ASN1_TYPE_free(atyp);
375 ASN1_TYPE_free(atyp);