194 lines
6 KiB
C
194 lines
6 KiB
C
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/* $OpenBSD: evp_asn1.c,v 1.23 2018/11/09 04:20:27 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/asn1t.h>
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#include <openssl/err.h>
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int
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ASN1_TYPE_set_octetstring(ASN1_TYPE *a, const unsigned char *data, int len)
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{
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ASN1_STRING *os;
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if ((os = ASN1_OCTET_STRING_new()) == NULL)
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return (0);
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if (!ASN1_STRING_set(os, data, len)) {
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ASN1_OCTET_STRING_free(os);
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return (0);
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}
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ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os);
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return (1);
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}
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int
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ASN1_TYPE_get_octetstring(const ASN1_TYPE *a, unsigned char *data, int max_len)
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{
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int ret, num;
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unsigned char *p;
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if ((a->type != V_ASN1_OCTET_STRING) ||
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(a->value.octet_string == NULL)) {
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ASN1error(ASN1_R_DATA_IS_WRONG);
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return (-1);
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}
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p = ASN1_STRING_data(a->value.octet_string);
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ret = ASN1_STRING_length(a->value.octet_string);
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if (ret < max_len)
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num = ret;
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else
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num = max_len;
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memcpy(data, p, num);
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return (ret);
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}
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typedef struct {
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ASN1_INTEGER *num;
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ASN1_OCTET_STRING *value;
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} ASN1_int_octetstring;
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static const ASN1_TEMPLATE ASN1_INT_OCTETSTRING_seq_tt[] = {
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{
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.offset = offsetof(ASN1_int_octetstring, num),
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.field_name = "num",
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.item = &ASN1_INTEGER_it,
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},
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{
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.offset = offsetof(ASN1_int_octetstring, value),
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.field_name = "value",
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.item = &ASN1_OCTET_STRING_it,
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},
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};
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const ASN1_ITEM ASN1_INT_OCTETSTRING_it = {
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.itype = ASN1_ITYPE_SEQUENCE,
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.utype = V_ASN1_SEQUENCE,
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.templates = ASN1_INT_OCTETSTRING_seq_tt,
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.tcount = sizeof(ASN1_INT_OCTETSTRING_seq_tt) / sizeof(ASN1_TEMPLATE),
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.size = sizeof(ASN1_int_octetstring),
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.sname = "ASN1_INT_OCTETSTRING",
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};
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int
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ASN1_TYPE_set_int_octetstring(ASN1_TYPE *at, long num, const unsigned char *data,
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int len)
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{
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ASN1_int_octetstring *ios;
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ASN1_STRING *sp = NULL;
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int ret = 0;
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if ((ios = (ASN1_int_octetstring *)ASN1_item_new(
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&ASN1_INT_OCTETSTRING_it)) == NULL)
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goto err;
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if (!ASN1_INTEGER_set(ios->num, num))
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goto err;
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if (!ASN1_OCTET_STRING_set(ios->value, data, len))
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goto err;
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if ((sp = ASN1_item_pack(ios, &ASN1_INT_OCTETSTRING_it, NULL)) == NULL)
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goto err;
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ASN1_TYPE_set(at, V_ASN1_SEQUENCE, sp);
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sp = NULL;
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ret = 1;
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err:
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ASN1_item_free((ASN1_VALUE *)ios, &ASN1_INT_OCTETSTRING_it);
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ASN1_STRING_free(sp);
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return ret;
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}
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int
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ASN1_TYPE_get_int_octetstring(const ASN1_TYPE *at, long *num, unsigned char *data,
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int max_len)
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{
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ASN1_STRING *sp = at->value.sequence;
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ASN1_int_octetstring *ios = NULL;
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int ret = -1;
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int len;
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if (at->type != V_ASN1_SEQUENCE || sp == NULL)
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goto err;
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if ((ios = ASN1_item_unpack(sp, &ASN1_INT_OCTETSTRING_it)) == NULL)
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goto err;
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if (num != NULL)
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*num = ASN1_INTEGER_get(ios->num);
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if (data != NULL) {
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len = ASN1_STRING_length(ios->value);
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if (len > max_len)
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len = max_len;
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memcpy(data, ASN1_STRING_data(ios->value), len);
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}
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ret = ASN1_STRING_length(ios->value);
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err:
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ASN1_item_free((ASN1_VALUE *)ios, &ASN1_INT_OCTETSTRING_it);
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if (ret == -1)
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ASN1error(ASN1_R_DATA_IS_WRONG);
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return ret;
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}
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