1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libcrypto/src/crypto/rsa/rsa_x931.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,177 @@
1.4 +/* rsa_x931.c */
1.5 +/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
1.6 + * project 2005.
1.7 + */
1.8 +/* ====================================================================
1.9 + * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
1.10 + *
1.11 + * Redistribution and use in source and binary forms, with or without
1.12 + * modification, are permitted provided that the following conditions
1.13 + * are met:
1.14 + *
1.15 + * 1. Redistributions of source code must retain the above copyright
1.16 + * notice, this list of conditions and the following disclaimer.
1.17 + *
1.18 + * 2. Redistributions in binary form must reproduce the above copyright
1.19 + * notice, this list of conditions and the following disclaimer in
1.20 + * the documentation and/or other materials provided with the
1.21 + * distribution.
1.22 + *
1.23 + * 3. All advertising materials mentioning features or use of this
1.24 + * software must display the following acknowledgment:
1.25 + * "This product includes software developed by the OpenSSL Project
1.26 + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
1.27 + *
1.28 + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
1.29 + * endorse or promote products derived from this software without
1.30 + * prior written permission. For written permission, please contact
1.31 + * licensing@OpenSSL.org.
1.32 + *
1.33 + * 5. Products derived from this software may not be called "OpenSSL"
1.34 + * nor may "OpenSSL" appear in their names without prior written
1.35 + * permission of the OpenSSL Project.
1.36 + *
1.37 + * 6. Redistributions of any form whatsoever must retain the following
1.38 + * acknowledgment:
1.39 + * "This product includes software developed by the OpenSSL Project
1.40 + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
1.41 + *
1.42 + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
1.43 + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.44 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.45 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
1.46 + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.47 + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
1.48 + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
1.49 + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.50 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1.51 + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.52 + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
1.53 + * OF THE POSSIBILITY OF SUCH DAMAGE.
1.54 + * ====================================================================
1.55 + *
1.56 + * This product includes cryptographic software written by Eric Young
1.57 + * (eay@cryptsoft.com). This product includes software written by Tim
1.58 + * Hudson (tjh@cryptsoft.com).
1.59 + *
1.60 + */
1.61 +
1.62 +#include <stdio.h>
1.63 +#include "cryptlib.h"
1.64 +#include <openssl/bn.h>
1.65 +#include <openssl/rsa.h>
1.66 +#include <openssl/rand.h>
1.67 +#include <openssl/objects.h>
1.68 +
1.69 +EXPORT_C int RSA_padding_add_X931(unsigned char *to, int tlen,
1.70 + const unsigned char *from, int flen)
1.71 + {
1.72 + int j;
1.73 + unsigned char *p;
1.74 +
1.75 + /* Absolute minimum amount of padding is 1 header nibble, 1 padding
1.76 + * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
1.77 + */
1.78 +
1.79 + j = tlen - flen - 2;
1.80 +
1.81 + if (j < 0)
1.82 + {
1.83 + RSAerr(RSA_F_RSA_PADDING_ADD_X931,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
1.84 + return -1;
1.85 + }
1.86 +
1.87 + p=(unsigned char *)to;
1.88 +
1.89 + /* If no padding start and end nibbles are in one byte */
1.90 + if (j == 0)
1.91 + *p++ = 0x6A;
1.92 + else
1.93 + {
1.94 + *p++ = 0x6B;
1.95 + if (j > 1)
1.96 + {
1.97 + memset(p, 0xBB, j - 1);
1.98 + p += j - 1;
1.99 + }
1.100 + *p++ = 0xBA;
1.101 + }
1.102 + memcpy(p,from,(unsigned int)flen);
1.103 + p += flen;
1.104 + *p = 0xCC;
1.105 + return(1);
1.106 + }
1.107 +
1.108 +EXPORT_C int RSA_padding_check_X931(unsigned char *to, int tlen,
1.109 + const unsigned char *from, int flen, int num)
1.110 + {
1.111 + int i = 0,j;
1.112 + const unsigned char *p;
1.113 +
1.114 + p=from;
1.115 + if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B)))
1.116 + {
1.117 + RSAerr(RSA_F_RSA_PADDING_CHECK_X931,RSA_R_INVALID_HEADER);
1.118 + return -1;
1.119 + }
1.120 +
1.121 + if (*p++ == 0x6B)
1.122 + {
1.123 + j=flen-3;
1.124 + for (i = 0; i < j; i++)
1.125 + {
1.126 + unsigned char c = *p++;
1.127 + if (c == 0xBA)
1.128 + break;
1.129 + if (c != 0xBB)
1.130 + {
1.131 + RSAerr(RSA_F_RSA_PADDING_CHECK_X931,
1.132 + RSA_R_INVALID_PADDING);
1.133 + return -1;
1.134 + }
1.135 + }
1.136 +
1.137 + j -= i;
1.138 +
1.139 + if (i == 0)
1.140 + {
1.141 + RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
1.142 + return -1;
1.143 + }
1.144 +
1.145 + }
1.146 + else j = flen - 2;
1.147 +
1.148 + if (p[j] != 0xCC)
1.149 + {
1.150 + RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
1.151 + return -1;
1.152 + }
1.153 +
1.154 + memcpy(to,p,(unsigned int)j);
1.155 +
1.156 + return(j);
1.157 + }
1.158 +
1.159 +/* Translate between X931 hash ids and NIDs */
1.160 +
1.161 +EXPORT_C int RSA_X931_hash_id(int nid)
1.162 + {
1.163 + switch (nid)
1.164 + {
1.165 + case NID_sha1:
1.166 + return 0x33;
1.167 +
1.168 + case NID_sha256:
1.169 + return 0x34;
1.170 +
1.171 + case NID_sha384:
1.172 + return 0x36;
1.173 +
1.174 + case NID_sha512:
1.175 + return 0x35;
1.176 +
1.177 + }
1.178 + return -1;
1.179 + }
1.180 +