2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * A nice addition from Dr Stephen Henson <steve@openssl.org> to add the
12 * -strparse option which parses nested binary structures
19 #include <openssl/err.h>
20 #include <openssl/evp.h>
21 #include <openssl/x509.h>
22 #include <openssl/pem.h>
24 typedef enum OPTION_choice {
25 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
26 OPT_INFORM, OPT_IN, OPT_OUT, OPT_INDENT, OPT_NOOUT,
27 OPT_OID, OPT_OFFSET, OPT_LENGTH, OPT_DUMP, OPT_DLIMIT,
28 OPT_STRPARSE, OPT_GENSTR, OPT_GENCONF, OPT_STRICTPEM
31 OPTIONS asn1parse_options[] = {
32 {"help", OPT_HELP, '-', "Display this summary"},
33 {"inform", OPT_INFORM, 'F', "input format - one of DER PEM"},
34 {"in", OPT_IN, '<', "input file"},
35 {"out", OPT_OUT, '>', "output file (output format is always DER)"},
36 {"i", OPT_INDENT, 0, "indents the output"},
37 {"noout", OPT_NOOUT, 0, "do not produce any output"},
38 {"offset", OPT_OFFSET, 'p', "offset into file"},
39 {"length", OPT_LENGTH, 'p', "length of section in file"},
40 {"oid", OPT_OID, '<', "file of extra oid definitions"},
41 {"dump", OPT_DUMP, 0, "unknown data in hex form"},
42 {"dlimit", OPT_DLIMIT, 'p',
43 "dump the first arg bytes of unknown data in hex form"},
44 {"strparse", OPT_STRPARSE, 's',
45 "offset; a series of these can be used to 'dig'"},
46 {OPT_MORE_STR, 0, 0, "into multiple ASN1 blob wrappings"},
47 {"genstr", OPT_GENSTR, 's', "string to generate ASN1 structure from"},
48 {"genconf", OPT_GENCONF, 's', "file to generate ASN1 structure from"},
49 {OPT_MORE_STR, 0, 0, "(-inform will be ignored)"},
50 {"strictpem", OPT_STRICTPEM, 0,
51 "do not attempt base64 decode outside PEM markers"},
55 static int do_generate(char *genstr, char *genconf, BUF_MEM *buf);
57 int asn1parse_main(int argc, char **argv)
60 BIO *in = NULL, *b64 = NULL, *derout = NULL;
62 STACK_OF(OPENSSL_STRING) *osk = NULL;
63 char *genstr = NULL, *genconf = NULL;
64 char *infile = NULL, *str = NULL, *oidfile = NULL, *derfile = NULL;
65 char *name = NULL, *header = NULL, *prog;
66 const unsigned char *ctmpbuf;
67 int indent = 0, noout = 0, dump = 0, strictpem = 0, informat = FORMAT_PEM;
68 int offset = 0, ret = 1, i, j;
70 unsigned char *tmpbuf;
71 unsigned int length = 0;
74 prog = opt_init(argc, argv, asn1parse_options);
76 if ((osk = sk_OPENSSL_STRING_new_null()) == NULL) {
77 BIO_printf(bio_err, "%s: Memory allocation failure\n", prog);
81 while ((o = opt_next()) != OPT_EOF) {
86 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
89 opt_help(asn1parse_options);
93 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
112 offset = strtol(opt_arg(), NULL, 0);
115 length = atoi(opt_arg());
121 dump = atoi(opt_arg());
124 sk_OPENSSL_STRING_push(osk, opt_arg());
134 informat = FORMAT_PEM;
138 argc = opt_num_rest();
142 if (oidfile != NULL) {
143 in = bio_open_default(oidfile, 'r', FORMAT_TEXT);
146 OBJ_create_objects(in);
150 if ((in = bio_open_default(infile, 'r', informat)) == NULL)
153 if (derfile && (derout = bio_open_default(derfile, 'w', FORMAT_ASN1)) == NULL)
157 if (PEM_read_bio(in, &name, &header, (unsigned char **)&str, &num) !=
159 BIO_printf(bio_err, "Error reading PEM file\n");
160 ERR_print_errors(bio_err);
165 if ((buf = BUF_MEM_new()) == NULL)
167 if (!BUF_MEM_grow(buf, BUFSIZ * 8))
168 goto end; /* Pre-allocate :-) */
170 if (genstr || genconf) {
171 num = do_generate(genstr, genconf, buf);
173 ERR_print_errors(bio_err);
180 if (informat == FORMAT_PEM) {
183 if ((b64 = BIO_new(BIO_f_base64())) == NULL)
193 if (!BUF_MEM_grow(buf, (int)num + BUFSIZ))
195 i = BIO_read(in, &(buf->data[num]), BUFSIZ);
205 /* If any structs to parse go through in sequence */
207 if (sk_OPENSSL_STRING_num(osk)) {
208 tmpbuf = (unsigned char *)str;
210 for (i = 0; i < sk_OPENSSL_STRING_num(osk); i++) {
213 j = atoi(sk_OPENSSL_STRING_value(osk, i));
215 BIO_printf(bio_err, "'%s' is an invalid number\n",
216 sk_OPENSSL_STRING_value(osk, i));
223 at = d2i_ASN1_TYPE(NULL, &ctmpbuf, tmplen);
224 ASN1_TYPE_free(atmp);
226 BIO_printf(bio_err, "Error parsing structure\n");
227 ERR_print_errors(bio_err);
230 typ = ASN1_TYPE_get(at);
231 if ((typ == V_ASN1_OBJECT)
232 || (typ == V_ASN1_BOOLEAN)
233 || (typ == V_ASN1_NULL)) {
234 BIO_printf(bio_err, "Can't parse %s type\n", ASN1_tag2str(typ));
235 ERR_print_errors(bio_err);
238 /* hmm... this is a little evil but it works */
239 tmpbuf = at->value.asn1_string->data;
240 tmplen = at->value.asn1_string->length;
242 str = (char *)tmpbuf;
247 BIO_printf(bio_err, "Error: offset too large\n");
253 if ((length == 0) || ((long)length > num))
254 length = (unsigned int)num;
256 if (BIO_write(derout, str + offset, length) != (int)length) {
257 BIO_printf(bio_err, "Error writing output\n");
258 ERR_print_errors(bio_err);
263 !ASN1_parse_dump(bio_out, (unsigned char *)&(str[offset]), length,
265 ERR_print_errors(bio_err);
274 ERR_print_errors(bio_err);
277 OPENSSL_free(header);
281 sk_OPENSSL_STRING_free(osk);
285 static int do_generate(char *genstr, char *genconf, BUF_MEM *buf)
290 ASN1_TYPE *atyp = NULL;
293 if ((cnf = app_load_config(genconf)) == NULL)
296 genstr = NCONF_get_string(cnf, "default", "asn1");
298 BIO_printf(bio_err, "Can't find 'asn1' in '%s'\n", genconf);
303 atyp = ASN1_generate_nconf(genstr, cnf);
310 len = i2d_ASN1_TYPE(atyp, NULL);
315 if (!BUF_MEM_grow(buf, len))
318 p = (unsigned char *)buf->data;
320 i2d_ASN1_TYPE(atyp, &p);
322 ASN1_TYPE_free(atyp);
327 ASN1_TYPE_free(atyp);