1 /* $OpenBSD: rsa_x931.c,v 1.8 2014/07/11 08:44:49 jsing Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2005 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
62 #include <openssl/bn.h>
63 #include <openssl/err.h>
64 #include <openssl/objects.h>
65 #include <openssl/rsa.h>
68 RSA_padding_add_X931(unsigned char *to, int tlen, const unsigned char *from,
75 * Absolute minimum amount of padding is 1 header nibble, 1 padding
76 * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
81 RSAerr(RSA_F_RSA_PADDING_ADD_X931,
82 RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
86 p = (unsigned char *)to;
88 /* If no padding start and end nibbles are in one byte */
94 memset(p, 0xBB, j - 1);
99 memcpy(p, from, flen);
106 RSA_padding_check_X931(unsigned char *to, int tlen, const unsigned char *from,
110 const unsigned char *p = from;
112 if (num != flen || (*p != 0x6A && *p != 0x6B)) {
113 RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_HEADER);
119 for (i = 0; i < j; i++) {
120 unsigned char c = *p++;
124 RSAerr(RSA_F_RSA_PADDING_CHECK_X931,
125 RSA_R_INVALID_PADDING);
131 RSAerr(RSA_F_RSA_PADDING_CHECK_X931,
132 RSA_R_INVALID_PADDING);
140 if (j < 0 || p[j] != 0xCC) {
141 RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
150 /* Translate between X931 hash ids and NIDs */
153 RSA_X931_hash_id(int nid)