Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/crypto/../../libssl/src/crypto/rsa/rsa_pk1.c	Lines:	56	78	71.8 %
Date:	2016-12-06	Branches:	23	38	60.5 %


/* $OpenBSD: rsa_pk1.c,v 1.14 2014/10/22 13:02:04 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/rsa.h>

int
RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
    const unsigned char *from, int flen)
{
	int j;
	unsigned char *p;

	if (flen > (tlen - RSA_PKCS1_PADDING_SIZE)) {
		RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1,
		    RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
		return 0;
	}

	p = (unsigned char *)to;

	*(p++) = 0;
	*(p++) = 1; /* Private Key BT (Block Type) */

	/* pad out with 0xff data */
	j = tlen - 3 - flen;
	memset(p, 0xff, j);
	p += j;
	*(p++) = '\0';
	memcpy(p, from, flen);

	return 1;
}

int
RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
    const unsigned char *from, int flen, int num)
{
	int i, j;
	const unsigned char *p;

	p = from;
	if (num != flen + 1 || *(p++) != 01) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
		    RSA_R_BLOCK_TYPE_IS_NOT_01);
		return -1;
	}

	/* scan over padding data */
	j = flen - 1; /* one for type. */
	for (i = 0; i < j; i++) {
		if (*p != 0xff) {
			/* should decrypt to 0xff */
			if (*p == 0) {
				p++;
				break;
			} else {
				RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
				    RSA_R_BAD_FIXED_HEADER_DECRYPT);
				return -1;
			}
		}
		p++;
	}

	if (i == j) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
		    RSA_R_NULL_BEFORE_BLOCK_MISSING);
		return -1;
	}

	if (i < 8) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
		    RSA_R_BAD_PAD_BYTE_COUNT);
		return -1;
	}
	i++; /* Skip over the '\0' */
	j -= i;
	if (j > tlen) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
		    RSA_R_DATA_TOO_LARGE);
		return -1;
	}
	memcpy(to, p, j);

	return j;
}

int
RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
    const unsigned char *from, int flen)
{
	int i, j;
	unsigned char *p;

	if (flen > tlen - 11) {
		RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2,
		    RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
		return 0;
	}

	p = (unsigned char *)to;

	*(p++) = 0;
	*(p++) = 2; /* Public Key BT (Block Type) */

	/* pad out with non-zero random data */
	j = tlen - 3 - flen;

	arc4random_buf(p, j);
	for (i = 0; i < j; i++) {
		while (*p == '\0')
			arc4random_buf(p, 1);
		p++;
	}

	*(p++) = '\0';

	memcpy(p, from, flen);
	return 1;
}

int
RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
    const unsigned char *from, int flen, int num)
{
	int i, j;
	const unsigned char *p;

	p = from;
	if (num != flen + 1 || *(p++) != 02) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
		    RSA_R_BLOCK_TYPE_IS_NOT_02);
		return -1;
	}

	/* scan over padding data */
	j = flen - 1; /* one for type. */
	for (i = 0; i < j; i++)
		if (*(p++) == 0)
			break;

	if (i == j) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
		    RSA_R_NULL_BEFORE_BLOCK_MISSING);
		return -1;
	}

	if (i < 8) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
		    RSA_R_BAD_PAD_BYTE_COUNT);
		return -1;
	}
	i++; /* Skip over the '\0' */
	j -= i;
	if (j > tlen) {
		RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
		    RSA_R_DATA_TOO_LARGE);
		return -1;
	}
	memcpy(to, p, j);

	return j;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: rsa_pk1.c,v 1.14 2014/10/22 13:02:04 jsing Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <stdio.h>
60			#include <stdlib.h>
61			#include <string.h>
62
63			#include <openssl/bn.h>
64			#include <openssl/err.h>
65			#include <openssl/rsa.h>
66
67			int
68			RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
69			const unsigned char *from, int flen)
70		2	{
71			int j;
72			unsigned char *p;
73
74	✗✓	2	if (flen > (tlen - RSA_PKCS1_PADDING_SIZE)) {
75			RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1,
76			RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
77			return 0;
78			}
79
80		2	p = (unsigned char *)to;
81
82		2	*(p++) = 0;
83		2	(p++) = 1; / Private Key BT (Block Type) */
84
85			/* pad out with 0xff data */
86		2	j = tlen - 3 - flen;
87		2	memset(p, 0xff, j);
88		2	p += j;
89		2	*(p++) = '\0';
90		2	memcpy(p, from, flen);
91
92		2	return 1;
93			}
94
95			int
96			RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
97			const unsigned char *from, int flen, int num)
98		8	{
99			int i, j;
100			const unsigned char *p;
101
102		8	p = from;
103	✓✗✗✓	8	if (num != flen + 1 \|\| *(p++) != 01) {
104			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
105			RSA_R_BLOCK_TYPE_IS_NOT_01);
106			return -1;
107			}
108
109			/* scan over padding data */
110		8	j = flen - 1; /* one for type. */
111	✓✗	1624	for (i = 0; i < j; i++) {
112	✓✓	1624	if (*p != 0xff) {
113			/* should decrypt to 0xff */
114	✓✗	8	if (*p == 0) {
115		8	p++;
116		8	break;
117			} else {
118			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
119			RSA_R_BAD_FIXED_HEADER_DECRYPT);
120			return -1;
121			}
122			}
123		1616	p++;
124			}
125
126	✗✓	8	if (i == j) {
127			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
128			RSA_R_NULL_BEFORE_BLOCK_MISSING);
129			return -1;
130			}
131
132	✗✓	8	if (i < 8) {
133			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
134			RSA_R_BAD_PAD_BYTE_COUNT);
135			return -1;
136			}
137		8	i++; /* Skip over the '\0' */
138		8	j -= i;
139	✗✓	8	if (j > tlen) {
140			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1,
141			RSA_R_DATA_TOO_LARGE);
142			return -1;
143			}
144		8	memcpy(to, p, j);
145
146		8	return j;
147			}
148
149			int
150			RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
151			const unsigned char *from, int flen)
152		1	{
153			int i, j;
154			unsigned char *p;
155
156	✗✓	1	if (flen > tlen - 11) {
157			RSAerr(RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2,
158			RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
159			return 0;
160			}
161
162		1	p = (unsigned char *)to;
163
164		1	*(p++) = 0;
165		1	(p++) = 2; / Public Key BT (Block Type) */
166
167			/* pad out with non-zero random data */
168		1	j = tlen - 3 - flen;
169
170		1	arc4random_buf(p, j);
171	✓✓	222	for (i = 0; i < j; i++) {
172	✓✓	222	while (*p == '\0')
173		1	arc4random_buf(p, 1);
174		221	p++;
175			}
176
177		1	*(p++) = '\0';
178
179		1	memcpy(p, from, flen);
180		1	return 1;
181			}
182
183			int
184			RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
185			const unsigned char *from, int flen, int num)
186		1	{
187			int i, j;
188			const unsigned char *p;
189
190		1	p = from;
191	✓✗✗✓	1	if (num != flen + 1 \|\| *(p++) != 02) {
192			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
193			RSA_R_BLOCK_TYPE_IS_NOT_02);
194			return -1;
195			}
196
197			/* scan over padding data */
198		1	j = flen - 1; /* one for type. */
199	✓✗	222	for (i = 0; i < j; i++)
200	✓✓	222	if (*(p++) == 0)
201		1	break;
202
203	✗✓	1	if (i == j) {
204			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
205			RSA_R_NULL_BEFORE_BLOCK_MISSING);
206			return -1;
207			}
208
209	✗✓	1	if (i < 8) {
210			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
211			RSA_R_BAD_PAD_BYTE_COUNT);
212			return -1;
213			}
214		1	i++; /* Skip over the '\0' */
215		1	j -= i;
216	✗✓	1	if (j > tlen) {
217			RSAerr(RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2,
218			RSA_R_DATA_TOO_LARGE);
219			return -1;
220			}
221		1	memcpy(to, p, j);
222
223		1	return j;
224			}