GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/asn1/evp_asn1.c Lines: 13 73 17.8 %
Date: 2017-11-07 Branches: 5 36 13.9 %

Line Branch Exec Source
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/* $OpenBSD: evp_asn1.c,v 1.19 2017/01/29 17:49:22 beck 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/asn1_mac.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, 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 max_len:  for returned value    */
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int
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ASN1_TYPE_get_octetstring(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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int
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ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
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    int len)
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{
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	int n, size;
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	ASN1_OCTET_STRING os, *osp;
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	ASN1_INTEGER in;
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	unsigned char *p;
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	unsigned char buf[32]; /* when they have 256bit longs,
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				* I'll be in trouble */
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	in.data = buf;
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	in.length = 32;
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	os.data = data;
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	os.type = V_ASN1_OCTET_STRING;
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	os.length = len;
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	ASN1_INTEGER_set(&in, num);
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	n = i2d_ASN1_INTEGER(&in, NULL);
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	n += i2d_ASN1_bytes((ASN1_STRING *)&os, NULL, V_ASN1_OCTET_STRING,
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	    V_ASN1_UNIVERSAL);
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	size = ASN1_object_size(1, n, V_ASN1_SEQUENCE);
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	if ((osp = ASN1_STRING_new()) == NULL)
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		return (0);
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	/* Grow the 'string' */
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	if (!ASN1_STRING_set(osp, NULL, size)) {
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		ASN1_STRING_free(osp);
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		return (0);
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	}
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	ASN1_STRING_length_set(osp, size);
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	p = ASN1_STRING_data(osp);
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	ASN1_put_object(&p, 1,n, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);
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	i2d_ASN1_INTEGER(&in, &p);
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	i2d_ASN1_bytes((ASN1_STRING *)&os, &p, V_ASN1_OCTET_STRING,
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	    V_ASN1_UNIVERSAL);
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	ASN1_TYPE_set(a, V_ASN1_SEQUENCE, osp);
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	return (1);
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}
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/* we return the actual length..., num may be missing, in which
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 * case, set it to zero */
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/* int max_len:  for returned value    */
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int
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ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,
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    int max_len)
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{
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	int ret = -1, n;
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	ASN1_INTEGER *ai = NULL;
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	ASN1_OCTET_STRING *os = NULL;
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	const unsigned char *p;
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	long length;
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	ASN1_const_CTX c;
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	if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) {
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		goto err;
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	}
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	p = ASN1_STRING_data(a->value.sequence);
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	length = ASN1_STRING_length(a->value.sequence);
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	c.pp = &p;
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	c.p = p;
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	c.max = p + length;
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	c.error = ASN1_R_DATA_IS_WRONG;
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	M_ASN1_D2I_start_sequence();
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	c.q = c.p;
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	if ((ai = d2i_ASN1_INTEGER(NULL, &c.p, c.slen)) == NULL)
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		goto err;
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	c.slen -= (c.p - c.q);
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	c.q = c.p;
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	if ((os = d2i_ASN1_OCTET_STRING(NULL, &c.p, c.slen)) == NULL)
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		goto err;
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	c.slen -= (c.p - c.q);
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	if (!M_ASN1_D2I_end_sequence())
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		goto err;
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	if (num != NULL)
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		*num = ASN1_INTEGER_get(ai);
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	ret = ASN1_STRING_length(os);
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	if (max_len > ret)
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		n = ret;
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	else
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		n = max_len;
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	if (data != NULL)
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		memcpy(data, ASN1_STRING_data(os), n);
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	if (0) {
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err:
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		ASN1error(ASN1_R_DATA_IS_WRONG);
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	}
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	ASN1_OCTET_STRING_free(os);
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	ASN1_INTEGER_free(ai);
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	return (ret);
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}