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 %

Line Branch Exec Source
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/* $OpenBSD: evp_key.c,v 1.24 2017/01/29 17:49:23 beck Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <stdio.h>
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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/ui.h>
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#include <openssl/x509.h>
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/* should be init to zeros. */
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static char prompt_string[80];
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void
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EVP_set_pw_prompt(const char *prompt)
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{
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	if (prompt == NULL)
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		prompt_string[0] = '\0';
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	else {
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		strlcpy(prompt_string, prompt, sizeof(prompt_string));
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	}
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}
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char *
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EVP_get_pw_prompt(void)
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{
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	if (prompt_string[0] == '\0')
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		return (NULL);
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	else
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		return (prompt_string);
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}
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int
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EVP_read_pw_string(char *buf, int len, const char *prompt, int verify)
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{
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	return EVP_read_pw_string_min(buf, 0, len, prompt, verify);
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}
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int
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EVP_read_pw_string_min(char *buf, int min, int len, const char *prompt,
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    int verify)
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{
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	int ret;
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	char buff[BUFSIZ];
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	UI *ui;
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	if ((prompt == NULL) && (prompt_string[0] != '\0'))
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		prompt = prompt_string;
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	ui = UI_new();
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	if (ui == NULL)
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		return -1;
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	if (UI_add_input_string(ui, prompt, 0, buf, min,
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	    (len >= BUFSIZ) ? BUFSIZ - 1 : len) < 0)
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		return -1;
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	if (verify) {
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		if (UI_add_verify_string(ui, prompt, 0, buff, min,
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		    (len >= BUFSIZ) ? BUFSIZ - 1 : len, buf) < 0)
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			return -1;
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	}
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	ret = UI_process(ui);
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	UI_free(ui);
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	explicit_bzero(buff, BUFSIZ);
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	return ret;
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}
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123
int
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EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
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    const unsigned char *salt, const unsigned char *data, int datal,
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    int count, unsigned char *key, unsigned char *iv)
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{
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1228
	EVP_MD_CTX c;
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614
	unsigned char md_buf[EVP_MAX_MD_SIZE];
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	int niv, nkey, addmd = 0;
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614
	unsigned int mds = 0, i;
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	int rv = 0;
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134
614
	nkey = type->key_len;
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614
	niv = type->iv_len;
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137
614
	if ((size_t)nkey > EVP_MAX_KEY_LENGTH) {
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		EVPerror(EVP_R_BAD_KEY_LENGTH);
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		return 0;
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	}
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614
	if ((size_t)niv > EVP_MAX_IV_LENGTH) {
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		EVPerror(EVP_R_IV_TOO_LARGE);
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		return 0;
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	}
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146
614
	if (data == NULL)
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		return (nkey);
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149
614
	EVP_MD_CTX_init(&c);
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1160
	for (;;) {
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1160
		if (!EVP_DigestInit_ex(&c, md, NULL))
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			goto err;
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1160
		if (addmd++)
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546
			if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
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				goto err;
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1160
		if (!EVP_DigestUpdate(&c, data, datal))
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			goto err;
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1160
		if (salt != NULL)
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1160
			if (!EVP_DigestUpdate(&c, salt, PKCS5_SALT_LEN))
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				goto err;
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1160
		if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
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			goto err;
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164
2320
		for (i = 1; i < (unsigned int)count; i++) {
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			if (!EVP_DigestInit_ex(&c, md, NULL))
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				goto err;
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			if (!EVP_DigestUpdate(&c, &(md_buf[0]), mds))
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				goto err;
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			if (!EVP_DigestFinal_ex(&c, &(md_buf[0]), &mds))
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				goto err;
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		}
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		i = 0;
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1160
		if (nkey) {
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12060
			for (;;) {
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12060
				if (nkey == 0)
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					break;
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11446
				if (i == mds)
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					break;
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11240
				if (key != NULL)
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11240
					*(key++) = md_buf[i];
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11240
				nkey--;
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11240
				i++;
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			}
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		}
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2128
		if (niv && (i != mds)) {
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5458
			for (;;) {
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5458
				if (niv == 0)
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					break;
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4992
				if (i == mds)
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					break;
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4944
				if (iv != NULL)
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4800
					*(iv++) = md_buf[i];
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4944
				niv--;
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4944
				i++;
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			}
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		}
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1160
		if ((nkey == 0) && (niv == 0))
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			break;
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	}
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614
	rv = type->key_len;
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202
err:
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614
	EVP_MD_CTX_cleanup(&c);
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614
	explicit_bzero(md_buf, sizeof md_buf);
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614
	return rv;
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614
}