/* crypto/evp/evp_key.c *//* 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 "cryptlib.h"#include "x509.h"#include "objects.h"#include "evp.h"/* should be init to zeros. */static char prompt_string[80];void EVP_set_pw_prompt(prompt)char *prompt;	{	if (prompt == NULL)		prompt_string[0]='\0';	else		strncpy(prompt_string,prompt,79);	}char *EVP_get_pw_prompt()	{	if (prompt_string[0] == '\0')		return(NULL);	else		return(prompt_string);	}#ifdef NO_DESint des_read_pw_string(char *buf,int len,char *prompt,int verify);#endifint EVP_read_pw_string(buf,len,prompt,verify)char *buf;int len;char *prompt;int verify;	{	if ((prompt == NULL) && (prompt_string[0] != '\0'))		prompt=prompt_string;	return(des_read_pw_string(buf,len,prompt,verify));	}int EVP_BytesToKey(type,md,salt,data,datal,count,key,iv)EVP_CIPHER *type;EVP_MD *md;unsigned char *salt;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;	nkey=type->key_len;	niv=type->iv_len;	if (data == NULL) return(nkey);	for (;;)		{		EVP_DigestInit(&c,md);		if (addmd++)			EVP_DigestUpdate(&c,&(md_buf[0]),mds);		EVP_DigestUpdate(&c,data,datal);		if (salt != NULL)			EVP_DigestUpdate(&c,salt,8);		EVP_DigestFinal(&c,&(md_buf[0]),&mds);		for (i=1; i<(unsigned int)count; i++)			{			EVP_DigestInit(&c,md);			EVP_DigestUpdate(&c,&(md_buf[0]),mds);			EVP_DigestFinal(&c,&(md_buf[0]),&mds);			}		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;		}	memset(&c,0,sizeof(c));	memset(&(md_buf[0]),0,EVP_MAX_MD_SIZE);	return(type->key_len);	}