2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/x509.h>
18 #include <openssl/pem.h>
19 #include <openssl/asn1t.h>
21 typedef enum OPTION_choice
{
22 OPT_ERR
= -1, OPT_EOF
= 0, OPT_HELP
,
23 OPT_INFORM
, OPT_IN
, OPT_OUT
, OPT_INDENT
, OPT_NOOUT
,
24 OPT_OID
, OPT_OFFSET
, OPT_LENGTH
, OPT_DUMP
, OPT_DLIMIT
,
25 OPT_STRPARSE
, OPT_GENSTR
, OPT_GENCONF
, OPT_STRICTPEM
,
29 const OPTIONS asn1parse_options
[] = {
30 {"help", OPT_HELP
, '-', "Display this summary"},
31 {"inform", OPT_INFORM
, 'F', "input format - one of DER PEM"},
32 {"in", OPT_IN
, '<', "input file"},
33 {"out", OPT_OUT
, '>', "output file (output format is always DER)"},
34 {"i", OPT_INDENT
, 0, "indents the output"},
35 {"noout", OPT_NOOUT
, 0, "do not produce any output"},
36 {"offset", OPT_OFFSET
, 'p', "offset into file"},
37 {"length", OPT_LENGTH
, 'p', "length of section in file"},
38 {"oid", OPT_OID
, '<', "file of extra oid definitions"},
39 {"dump", OPT_DUMP
, 0, "unknown data in hex form"},
40 {"dlimit", OPT_DLIMIT
, 'p',
41 "dump the first arg bytes of unknown data in hex form"},
42 {"strparse", OPT_STRPARSE
, 'p',
43 "offset; a series of these can be used to 'dig'"},
44 {OPT_MORE_STR
, 0, 0, "into multiple ASN1 blob wrappings"},
45 {"genstr", OPT_GENSTR
, 's', "string to generate ASN1 structure from"},
46 {"genconf", OPT_GENCONF
, 's', "file to generate ASN1 structure from"},
47 {OPT_MORE_STR
, 0, 0, "(-inform will be ignored)"},
48 {"strictpem", OPT_STRICTPEM
, 0,
49 "do not attempt base64 decode outside PEM markers"},
50 {"item", OPT_ITEM
, 's', "item to parse and print"},
54 static int do_generate(char *genstr
, const char *genconf
, BUF_MEM
*buf
);
56 int asn1parse_main(int argc
, char **argv
)
59 BIO
*in
= NULL
, *b64
= NULL
, *derout
= NULL
;
61 STACK_OF(OPENSSL_STRING
) *osk
= NULL
;
62 char *genstr
= NULL
, *genconf
= NULL
;
63 char *infile
= NULL
, *oidfile
= NULL
, *derfile
= NULL
;
64 unsigned char *str
= 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;
73 const ASN1_ITEM
*it
= NULL
;
75 prog
= opt_init(argc
, argv
, asn1parse_options
);
77 if ((osk
= sk_OPENSSL_STRING_new_null()) == NULL
) {
78 BIO_printf(bio_err
, "%s: Memory allocation failure\n", prog
);
82 while ((o
= opt_next()) != OPT_EOF
) {
87 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
90 opt_help(asn1parse_options
);
94 if (!opt_format(opt_arg(), OPT_FMT_PEMDER
, &informat
))
113 offset
= strtol(opt_arg(), NULL
, 0);
116 length
= strtol(opt_arg(), NULL
, 0);
122 dump
= strtol(opt_arg(), NULL
, 0);
125 sk_OPENSSL_STRING_push(osk
, opt_arg());
135 informat
= FORMAT_PEM
;
138 it
= ASN1_ITEM_lookup(opt_arg());
142 BIO_printf(bio_err
, "Unknown item name %s\n", opt_arg());
143 BIO_puts(bio_err
, "Supported types:\n");
144 for (tmp
= 0;; tmp
++) {
145 it
= ASN1_ITEM_get(tmp
);
148 BIO_printf(bio_err
, " %s\n", it
->sname
);
155 argc
= opt_num_rest();
159 if (oidfile
!= NULL
) {
160 in
= bio_open_default(oidfile
, 'r', FORMAT_TEXT
);
163 OBJ_create_objects(in
);
167 if ((in
= bio_open_default(infile
, 'r', informat
)) == NULL
)
170 if (derfile
&& (derout
= bio_open_default(derfile
, 'w', FORMAT_ASN1
)) == NULL
)
173 if ((buf
= BUF_MEM_new()) == NULL
)
176 if (PEM_read_bio(in
, &name
, &header
, &str
, &num
) != 1) {
177 BIO_printf(bio_err
, "Error reading PEM file\n");
178 ERR_print_errors(bio_err
);
181 buf
->data
= (char *)str
;
182 buf
->length
= buf
->max
= num
;
184 if (!BUF_MEM_grow(buf
, BUFSIZ
* 8))
185 goto end
; /* Pre-allocate :-) */
187 if (genstr
|| genconf
) {
188 num
= do_generate(genstr
, genconf
, buf
);
190 ERR_print_errors(bio_err
);
195 if (informat
== FORMAT_PEM
) {
198 if ((b64
= BIO_new(BIO_f_base64())) == NULL
)
208 if (!BUF_MEM_grow(buf
, num
+ BUFSIZ
))
210 i
= BIO_read(in
, &(buf
->data
[num
]), BUFSIZ
);
216 str
= (unsigned char *)buf
->data
;
220 /* If any structs to parse go through in sequence */
222 if (sk_OPENSSL_STRING_num(osk
)) {
225 for (i
= 0; i
< sk_OPENSSL_STRING_num(osk
); i
++) {
228 j
= strtol(sk_OPENSSL_STRING_value(osk
, i
), NULL
, 0);
229 if (j
<= 0 || j
>= tmplen
) {
230 BIO_printf(bio_err
, "'%s' is out of range\n",
231 sk_OPENSSL_STRING_value(osk
, i
));
238 at
= d2i_ASN1_TYPE(NULL
, &ctmpbuf
, tmplen
);
239 ASN1_TYPE_free(atmp
);
241 BIO_printf(bio_err
, "Error parsing structure\n");
242 ERR_print_errors(bio_err
);
245 typ
= ASN1_TYPE_get(at
);
246 if ((typ
== V_ASN1_OBJECT
)
247 || (typ
== V_ASN1_BOOLEAN
)
248 || (typ
== V_ASN1_NULL
)) {
249 BIO_printf(bio_err
, "Can't parse %s type\n", ASN1_tag2str(typ
));
250 ERR_print_errors(bio_err
);
253 /* hmm... this is a little evil but it works */
254 tmpbuf
= at
->value
.asn1_string
->data
;
255 tmplen
= at
->value
.asn1_string
->length
;
261 if (offset
< 0 || offset
>= num
) {
262 BIO_printf(bio_err
, "Error: offset out of range\n");
268 if (length
== 0 || length
> (unsigned int)num
)
269 length
= (unsigned int)num
;
270 if (derout
!= NULL
) {
271 if (BIO_write(derout
, str
+ offset
, length
) != (int)length
) {
272 BIO_printf(bio_err
, "Error writing output\n");
273 ERR_print_errors(bio_err
);
278 const unsigned char *p
= str
+ offset
;
281 ASN1_VALUE
*value
= ASN1_item_d2i(NULL
, &p
, length
, it
);
283 BIO_printf(bio_err
, "Error parsing item %s\n", it
->sname
);
284 ERR_print_errors(bio_err
);
287 ASN1_item_print(bio_out
, value
, 0, it
, NULL
);
288 ASN1_item_free(value
, it
);
290 if (!ASN1_parse_dump(bio_out
, p
, length
, indent
, dump
)) {
291 ERR_print_errors(bio_err
);
302 ERR_print_errors(bio_err
);
305 OPENSSL_free(header
);
307 sk_OPENSSL_STRING_free(osk
);
311 static int do_generate(char *genstr
, const char *genconf
, BUF_MEM
*buf
)
316 ASN1_TYPE
*atyp
= NULL
;
318 if (genconf
!= NULL
) {
319 if ((cnf
= app_load_config(genconf
)) == NULL
)
322 genstr
= NCONF_get_string(cnf
, "default", "asn1");
323 if (genstr
== NULL
) {
324 BIO_printf(bio_err
, "Can't find 'asn1' in '%s'\n", genconf
);
329 atyp
= ASN1_generate_nconf(genstr
, cnf
);
336 len
= i2d_ASN1_TYPE(atyp
, NULL
);
341 if (!BUF_MEM_grow(buf
, len
))
344 p
= (unsigned char *)buf
->data
;
346 i2d_ASN1_TYPE(atyp
, &p
);
348 ASN1_TYPE_free(atyp
);
353 ASN1_TYPE_free(atyp
);