GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/rsa/rsa_x931.c Lines: 0 44 0.0 %
Date: 2017-11-13 Branches: 0 34 0.0 %

Line Branch Exec Source
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/* $OpenBSD: rsa_x931.c,v 1.10 2017/01/29 17:49:23 beck Exp $ */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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 * project 2005.
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 */
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/* ====================================================================
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 * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.
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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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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
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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
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 *    the documentation and/or other materials provided with the
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 *    distribution.
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 *
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 * 3. All advertising materials mentioning features or use of this
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 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    licensing@OpenSSL.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 *
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 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
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 */
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#include <stdio.h>
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#include <string.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/objects.h>
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#include <openssl/rsa.h>
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int
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RSA_padding_add_X931(unsigned char *to, int tlen, const unsigned char *from,
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    int flen)
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{
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	int j;
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	unsigned char *p;
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	/*
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	 * Absolute minimum amount of padding is 1 header nibble, 1 padding
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	 * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
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	 */
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	j = tlen - flen - 2;
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	if (j < 0) {
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		RSAerror(RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
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		return -1;
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	}
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	p = (unsigned char *)to;
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	/* If no padding start and end nibbles are in one byte */
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	if (j == 0)
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		*p++ = 0x6A;
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	else {
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		*p++ = 0x6B;
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		if (j > 1) {
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			memset(p, 0xBB, j - 1);
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			p += j - 1;
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		}
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		*p++ = 0xBA;
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	}
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	memcpy(p, from, flen);
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	p += flen;
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	*p = 0xCC;
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	return 1;
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}
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int
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RSA_padding_check_X931(unsigned char *to, int tlen, const unsigned char *from,
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    int flen, int num)
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{
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	int i = 0, j;
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	const unsigned char *p = from;
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	if (num != flen || (*p != 0x6A && *p != 0x6B)) {
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		RSAerror(RSA_R_INVALID_HEADER);
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		return -1;
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	}
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	if (*p++ == 0x6B) {
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		j = flen - 3;
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		for (i = 0; i < j; i++) {
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			unsigned char c = *p++;
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			if (c == 0xBA)
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				break;
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			if (c != 0xBB) {
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				RSAerror(RSA_R_INVALID_PADDING);
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				return -1;
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			}
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		}
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		if (i == 0) {
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			RSAerror(RSA_R_INVALID_PADDING);
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			return -1;
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		}
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		j -= i;
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	} else
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		j = flen - 2;
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	if (j < 0 || p[j] != 0xCC) {
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		RSAerror(RSA_R_INVALID_TRAILER);
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		return -1;
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	}
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	memcpy(to, p, j);
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	return j;
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}
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/* Translate between X931 hash ids and NIDs */
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int
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RSA_X931_hash_id(int nid)
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{
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	switch (nid) {
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	case NID_sha1:
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		return 0x33;
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	case NID_sha256:
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		return 0x34;
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	case NID_sha384:
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		return 0x36;
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	case NID_sha512:
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		return 0x35;
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	}
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	return -1;
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}