Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/evp/evp_key.c	Lines:	40	72	55.6 %
Date:	2017-11-13	Branches:	31	64	48.4 %


/* $OpenBSD: evp_key.c,v 1.24 2017/01/29 17:49:23 beck 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 <string.h>

#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/ui.h>
#include <openssl/x509.h>

/* should be init to zeros. */
static char prompt_string[80];

void
EVP_set_pw_prompt(const char *prompt)
{
	if (prompt == NULL)
		prompt_string[0] = '\0';
	else {
		strlcpy(prompt_string, prompt, sizeof(prompt_string));
	}
}

char *
EVP_get_pw_prompt(void)
{
	if (prompt_string[0] == '\0')
		return (NULL);
	else
		return (prompt_string);
}

int
EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
{
	return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
}

int
EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt,
    int verify)
{
	int ret;
	char buff[BUFSIZ];
	UI *ui;

	if ((prompt == NULL) && (prompt_string[0] != '\0'))
		prompt = prompt_string;
	ui = UI_new();
	if (ui == NULL)
		return -1;
	if (UI_add_input_string(ui, prompt, 0, buf, min,
	    (len >= BUFSIZ) ? BUFSIZ - 1 : len) < 0)
		return -1;
	if (verify) {
		if (UI_add_verify_string(ui, prompt, 0, buff, min,
		    (len >= BUFSIZ) ? BUFSIZ - 1 : len, buf) < 0)
			return -1;
	}
	ret = UI_process(ui);
	UI_free(ui);
	explicit_bzero(buff, BUFSIZ);
	return ret;
}

int
EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
    const unsigned char *salt, const unsigned char *data, int datal,
    int count, unsigned char *key, unsigned char *iv)
{
	EVP_MD_CTX c;
	unsigned char md_buf[EVP_MAX_MD_SIZE];
	int niv, nkey, addmd = 0;
	unsigned int mds = 0, i;
	int rv = 0;

	nkey = type->key_len;
	niv = type->iv_len;

	if ((size_t)nkey > EVP_MAX_KEY_LENGTH) {
		EVPerror(EVP_R_BAD_KEY_LENGTH);
		return 0;
	}
	if ((size_t)niv > EVP_MAX_IV_LENGTH) {
		EVPerror(EVP_R_IV_TOO_LARGE);
		return 0;
	}

	if (data == NULL)
		return (nkey);

	EVP_MD_CTX_init(&c);
	for (;;) {
		if (!EVP_DigestInit_ex(&c, md, NULL))
			goto err;
		if (addmd++)
			if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
				goto err;
		if (!EVP_DigestUpdate(&c, data, datal))
			goto err;
		if (salt != NULL)
			if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN))
				goto err;
		if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
			goto err;

		for (i = 1; i < (unsigned int)count; i++) {
			if (!EVP_DigestInit_ex(&c, md, NULL))
				goto err;
			if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
				goto err;
			if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
				goto err;
		}
		i = 0;
		if (nkey) {
			for (;;) {
				if (nkey == 0)
					break;
				if (i == mds)
					break;
				if (key != NULL)
					*(key++) = md_buf[i];
				nkey--;
				i++;
			}
		}
		if (niv && (i != mds)) {
			for (;;) {
				if (niv == 0)
					break;
				if (i == mds)
					break;
				if (iv != NULL)
					*(iv++) = md_buf[i];
				niv--;
				i++;
			}
		}
		if ((nkey == 0) && (niv == 0))
			break;
	}
	rv = type->key_len;

err:
	EVP_MD_CTX_cleanup(&c);
	explicit_bzero(md_buf, sizeof md_buf);
	return rv;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: evp_key.c,v 1.24 2017/01/29 17:49:23 beck 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 <string.h>
61
62			#include <openssl/err.h>
63			#include <openssl/evp.h>
64			#include <openssl/objects.h>
65			#include <openssl/ui.h>
66			#include <openssl/x509.h>
67
68			/* should be init to zeros. */
69			static char prompt_string[80];
70
71			void
72			EVP_set_pw_prompt(const char *prompt)
73			{
74			if (prompt == NULL)
75			prompt_string[0] = '\0';
76			else {
77			strlcpy(prompt_string, prompt, sizeof(prompt_string));
78			}
79			}
80
81			char *
82			EVP_get_pw_prompt(void)
83			{
84			if (prompt_string[0] == '\0')
85			return (NULL);
86			else
87			return (prompt_string);
88			}
89
90			int
91			EVP_read_pw_string(char buf, int len, const char prompt, int verify)
92			{
93			return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
94			}
95
96			int
97			EVP_read_pw_string_min(char buf, int min, int len, const char prompt,
98			int verify)
99			{
100			int ret;
101			char buff[BUFSIZ];
102			UI *ui;
103
104			if ((prompt == NULL) && (prompt_string[0] != '\0'))
105			prompt = prompt_string;
106			ui = UI_new();
107			if (ui == NULL)
108			return -1;
109			if (UI_add_input_string(ui, prompt, 0, buf, min,
110			(len >= BUFSIZ) ? BUFSIZ - 1 : len) < 0)
111			return -1;
112			if (verify) {
113			if (UI_add_verify_string(ui, prompt, 0, buff, min,
114			(len >= BUFSIZ) ? BUFSIZ - 1 : len, buf) < 0)
115			return -1;
116			}
117			ret = UI_process(ui);
118			UI_free(ui);
119			explicit_bzero(buff, BUFSIZ);
120			return ret;
121			}
122
123			int
124			EVP_BytesToKey(const EVP_CIPHER type, const EVP_MD md,
125			const unsigned char salt, const unsigned char data, int datal,
126			int count, unsigned char key, unsigned char iv)
127			{
128		1228	EVP_MD_CTX c;
129		614	unsigned char md_buf[EVP_MAX_MD_SIZE];
130			int niv, nkey, addmd = 0;
131		614	unsigned int mds = 0, i;
132			int rv = 0;
133
134		614	nkey = type->key_len;
135		614	niv = type->iv_len;
136
137	✗✓	614	if ((size_t)nkey > EVP_MAX_KEY_LENGTH) {
138			EVPerror(EVP_R_BAD_KEY_LENGTH);
139			return 0;
140			}
141	✗✓	614	if ((size_t)niv > EVP_MAX_IV_LENGTH) {
142			EVPerror(EVP_R_IV_TOO_LARGE);
143			return 0;
144			}
145
146	✗✓	614	if (data == NULL)
147			return (nkey);
148
149		614	EVP_MD_CTX_init(&c);
150		1160	for (;;) {
151	✓✗	1160	if (!EVP_DigestInit_ex(&c, md, NULL))
152			goto err;
153	✓✓	1160	if (addmd++)
154	✓✗	546	if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
155			goto err;
156	✓✗	1160	if (!EVP_DigestUpdate(&c, data, datal))
157			goto err;
158	✓✗	1160	if (salt != NULL)
159	✓✗	1160	if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN))
160			goto err;
161	✓✗	1160	if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
162			goto err;
163
164	✗✓	2320	for (i = 1; i < (unsigned int)count; i++) {
165			if (!EVP_DigestInit_ex(&c, md, NULL))
166			goto err;
167			if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
168			goto err;
169			if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
170			goto err;
171			}
172			i = 0;
173	✓✓	1160	if (nkey) {
174		12060	for (;;) {
175	✓✓	12060	if (nkey == 0)
176			break;
177	✓✓	11446	if (i == mds)
178			break;
179	✓✗	11240	if (key != NULL)
180		11240	*(key++) = md_buf[i];
181		11240	nkey--;
182		11240	i++;
183			}
184			}
185	✓✓✓✓	2128	if (niv && (i != mds)) {
186		5458	for (;;) {
187	✓✓	5458	if (niv == 0)
188			break;
189	✓✓	4992	if (i == mds)
190			break;
191	✓✓	4944	if (iv != NULL)
192		4800	*(iv++) = md_buf[i];
193		4944	niv--;
194		4944	i++;
195			}
196			}
197	✓✓	1160	if ((nkey == 0) && (niv == 0))
198			break;
199			}
200		614	rv = type->key_len;
201
202			err:
203		614	EVP_MD_CTX_cleanup(&c);
204		614	explicit_bzero(md_buf, sizeof md_buf);
205		614	return rv;
206		614	}