Symaptic: os/ossrv/ssl/libcrypto/src/crypto/rsa/rsa

     1 /* rsa_x931.c */

     2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

     3  * project 2005.

     4  */

     5 /* ====================================================================

     6  * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.

     7  *

     8  * Redistribution and use in source and binary forms, with or without

     9  * modification, are permitted provided that the following conditions

    10  * are met:

    11  *

    12  * 1. Redistributions of source code must retain the above copyright

    13  *    notice, this list of conditions and the following disclaimer.

    14  *

    15  * 2. Redistributions in binary form must reproduce the above copyright

    16  *    notice, this list of conditions and the following disclaimer in

    17  *    the documentation and/or other materials provided with the

    18  *    distribution.

    19  *

    20  * 3. All advertising materials mentioning features or use of this

    21  *    software must display the following acknowledgment:

    22  *    "This product includes software developed by the OpenSSL Project

    23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

    24  *

    25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

    26  *    endorse or promote products derived from this software without

    27  *    prior written permission. For written permission, please contact

    28  *    licensing@OpenSSL.org.

    29  *

    30  * 5. Products derived from this software may not be called "OpenSSL"

    31  *    nor may "OpenSSL" appear in their names without prior written

    32  *    permission of the OpenSSL Project.

    33  *

    34  * 6. Redistributions of any form whatsoever must retain the following

    35  *    acknowledgment:

    36  *    "This product includes software developed by the OpenSSL Project

    37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

    38  *

    39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

    40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

    43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

    45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

    48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

    50  * OF THE POSSIBILITY OF SUCH DAMAGE.

    51  * ====================================================================

    52  *

    53  * This product includes cryptographic software written by Eric Young

    54  * (eay@cryptsoft.com).  This product includes software written by Tim

    55  * Hudson (tjh@cryptsoft.com).

    56  *

    57  */

    59 #include <stdio.h>

    60 #include "cryptlib.h"

    61 #include <openssl/bn.h>

    62 #include <openssl/rsa.h>

    63 #include <openssl/rand.h>

    64 #include <openssl/objects.h>

    66 EXPORT_C int RSA_padding_add_X931(unsigned char *to, int tlen,

    67 	     const unsigned char *from, int flen)

    68 	{

    69 	int j;

    70 	unsigned char *p;

    72 	/* Absolute minimum amount of padding is 1 header nibble, 1 padding

    73 	 * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.

    74 	 */

    76 	j = tlen - flen - 2;

    78 	if (j < 0)

    79 		{

    80 		RSAerr(RSA_F_RSA_PADDING_ADD_X931,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);

    81 		return -1;

    82 		}

    84 	p=(unsigned char *)to;

    86 	/* If no padding start and end nibbles are in one byte */

    87 	if (j == 0)

    88 		*p++ = 0x6A;

    89 	else

    90 		{

    91 		*p++ = 0x6B;

    92 		if (j > 1)

    93 			{

    94 			memset(p, 0xBB, j - 1);

    95 			p += j - 1;

    96 			}

    97 		*p++ = 0xBA;

    98 		}

    99 	memcpy(p,from,(unsigned int)flen);

   100 	p += flen;

   101 	*p = 0xCC;

   102 	return(1);

   103 	}

   105 EXPORT_C int RSA_padding_check_X931(unsigned char *to, int tlen,

   106 	     const unsigned char *from, int flen, int num)

   107 	{

   108 	int i = 0,j;

   109 	const unsigned char *p;

   111 	p=from;

   112 	if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B)))

   113 		{

   114 		RSAerr(RSA_F_RSA_PADDING_CHECK_X931,RSA_R_INVALID_HEADER);

   115 		return -1;

   116 		}

   118 	if (*p++ == 0x6B)

   119 		{

   120 		j=flen-3;

   121 		for (i = 0; i < j; i++)

   122 			{

   123 			unsigned char c = *p++;

   124 			if (c == 0xBA)

   125 				break;

   126 			if (c != 0xBB)

   127 				{

   128 				RSAerr(RSA_F_RSA_PADDING_CHECK_X931,

   129 					RSA_R_INVALID_PADDING);

   130 				return -1;

   131 				}

   132 			}

   134 		j -= i;

   136 		if (i == 0)

   137 			{

   138 			RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);

   139 			return -1;

   140 			}

   142 		}

   143 	else j = flen - 2;

   145 	if (p[j] != 0xCC)

   146 		{

   147 		RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);

   148 		return -1;

   149 		}

   151 	memcpy(to,p,(unsigned int)j);

   153 	return(j);

   154 	}

   156 /* Translate between X931 hash ids and NIDs */

   158 EXPORT_C int RSA_X931_hash_id(int nid)

   159 	{

   160 	switch (nid)

   161 		{

   162 		case NID_sha1:

   163 		return 0x33;

   165 		case NID_sha256:

   166 		return 0x34;

   168 		case NID_sha384:

   169 		return 0x36;

   171 		case NID_sha512:

   172 		return 0x35;

   174 		}

   175 	return -1;

   176 	}

author	sl
	Tue, 10 Jun 2014 14:32:02 +0200
changeset 1	260cb5ec6c19
permissions	-rw-r--r--