/src/openssl/crypto/rsa/rsa_x931.c

Source (jump to first uncovered line)
/* rsa_x931.c */
/*
 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
 * 2005.
 */
/* ====================================================================
 * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/rsa.h>
#include <openssl/rand.h>
#include <openssl/objects.h>

int RSA_padding_add_X931(unsigned char *to, int tlen,
                         const unsigned char *from, int flen)
{
    int j;
    unsigned char *p;

    /*
     * Absolute minimum amount of padding is 1 header nibble, 1 padding
     * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
     */

    j = tlen - flen - 2;

    if (j < 0) {
        RSAerr(RSA_F_RSA_PADDING_ADD_X931, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
        return -1;
    }

    p = (unsigned char *)to;

    /* If no padding start and end nibbles are in one byte */
    if (j == 0)
        *p++ = 0x6A;
    else {
        *p++ = 0x6B;
        if (j > 1) {
            memset(p, 0xBB, j - 1);
            p += j - 1;
        }
        *p++ = 0xBA;
    }
    memcpy(p, from, (unsigned int)flen);
    p += flen;
    *p = 0xCC;
    return (1);
}

int RSA_padding_check_X931(unsigned char *to, int tlen,
                           const unsigned char *from, int flen, int num)
{
    int i = 0, j;
    const unsigned char *p;

    p = from;
    if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B))) {
        RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_HEADER);
        return -1;
    }

    if (*p++ == 0x6B) {
        j = flen - 3;
        for (i = 0; i < j; i++) {
            unsigned char c = *p++;
            if (c == 0xBA)
                break;
            if (c != 0xBB) {
                RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
                return -1;
            }
        }

        j -= i;

        if (i == 0) {
            RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
            return -1;
        }

    } else
        j = flen - 2;

    if (p[j] != 0xCC) {
        RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
        return -1;
    }

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

    return (j);
}

/* Translate between X931 hash ids and NIDs */

int RSA_X931_hash_id(int nid)
{
    switch (nid) {
    case NID_sha1:
        return 0x33;

    case NID_sha256:
        return 0x34;

    case NID_sha384:
        return 0x36;

    case NID_sha512:
        return 0x35;

    }
    return -1;
}

Line	Count	Source (jump to first uncovered line)
1		/* rsa_x931.c */
2		/*
3		* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4		* 2005.
5		*/
6		/* ====================================================================
7		* Copyright (c) 2005 The OpenSSL Project. All rights reserved.
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		*
13		* 1. Redistributions of source code must retain the above copyright
14		* notice, this list of conditions and the following disclaimer.
15		*
16		* 2. Redistributions in binary form must reproduce the above copyright
17		* notice, this list of conditions and the following disclaimer in
18		* the documentation and/or other materials provided with the
19		* distribution.
20		*
21		* 3. All advertising materials mentioning features or use of this
22		* software must display the following acknowledgment:
23		* "This product includes software developed by the OpenSSL Project
24		* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25		*
26		* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27		* endorse or promote products derived from this software without
28		* prior written permission. For written permission, please contact
29		* licensing@OpenSSL.org.
30		*
31		* 5. Products derived from this software may not be called "OpenSSL"
32		* nor may "OpenSSL" appear in their names without prior written
33		* permission of the OpenSSL Project.
34		*
35		* 6. Redistributions of any form whatsoever must retain the following
36		* acknowledgment:
37		* "This product includes software developed by the OpenSSL Project
38		* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39		*
40		* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41		* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43		* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44		* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46		* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47		* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49		* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50		* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51		* OF THE POSSIBILITY OF SUCH DAMAGE.
52		* ====================================================================
53		*
54		* This product includes cryptographic software written by Eric Young
55		* (eay@cryptsoft.com). This product includes software written by Tim
56		* Hudson (tjh@cryptsoft.com).
57		*
58		*/
59
60		#include <stdio.h>
61		#include "cryptlib.h"
62		#include <openssl/bn.h>
63		#include <openssl/rsa.h>
64		#include <openssl/rand.h>
65		#include <openssl/objects.h>
66
67		int RSA_padding_add_X931(unsigned char *to, int tlen,
68		const unsigned char *from, int flen)
69	0	{
70	0	int j;
71	0	unsigned char *p;
72
73		/*
74		* Absolute minimum amount of padding is 1 header nibble, 1 padding
75		* nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
76		*/
77
78	0	j = tlen - flen - 2;
79
80	0	if (j < 0) {
81	0	RSAerr(RSA_F_RSA_PADDING_ADD_X931, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
82	0	return -1;
83	0	}
84
85	0	p = (unsigned char *)to;
86
87		/* If no padding start and end nibbles are in one byte */
88	0	if (j == 0)
89	0	*p++ = 0x6A;
90	0	else {
91	0	*p++ = 0x6B;
92	0	if (j > 1) {
93	0	memset(p, 0xBB, j - 1);
94	0	p += j - 1;
95	0	}
96	0	*p++ = 0xBA;
97	0	}
98	0	memcpy(p, from, (unsigned int)flen);
99	0	p += flen;
100	0	*p = 0xCC;
101	0	return (1);
102	0	}
103
104		int RSA_padding_check_X931(unsigned char *to, int tlen,
105		const unsigned char *from, int flen, int num)
106	0	{
107	0	int i = 0, j;
108	0	const unsigned char *p;
109
110	0	p = from;
111	0	if ((num != flen) \|\| ((p != 0x6A) && (p != 0x6B))) {
112	0	RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_HEADER);
113	0	return -1;
114	0	}
115
116	0	if (*p++ == 0x6B) {
117	0	j = flen - 3;
118	0	for (i = 0; i < j; i++) {
119	0	unsigned char c = *p++;
120	0	if (c == 0xBA)
121	0	break;
122	0	if (c != 0xBB) {
123	0	RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
124	0	return -1;
125	0	}
126	0	}
127
128	0	j -= i;
129
130	0	if (i == 0) {
131	0	RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
132	0	return -1;
133	0	}
134
135	0	} else
136	0	j = flen - 2;
137
138	0	if (p[j] != 0xCC) {
139	0	RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
140	0	return -1;
141	0	}
142
143	0	memcpy(to, p, (unsigned int)j);
144
145	0	return (j);
146	0	}
147
148		/* Translate between X931 hash ids and NIDs */
149
150		int RSA_X931_hash_id(int nid)
151	0	{
152	0	switch (nid) {
153	0	case NID_sha1:
154	0	return 0x33;
155
156	0	case NID_sha256:
157	0	return 0x34;
158
159	0	case NID_sha384:
160	0	return 0x36;
161
162	0	case NID_sha512:
163	0	return 0x35;
164
165	0	}
166	0	return -1;
167	0	}

Coverage Report

Created: 2022-11-30 06:20