/* p12_key.c *//* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL * project 1999. *//* ==================================================================== * Copyright (c) 1999 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/pkcs12.h>/* Uncomment out this line to get debugging info about key generation *//*#define DEBUG_KEYGEN*/#ifdef DEBUG_KEYGEN#include <openssl/bio.h>extern BIO *bio_err;void h__dump (unsigned char *p, int len);#endif/* PKCS12 compatible key/IV generation */#ifndef min#define min(a,b) ((a) < (b) ? (a) : (b))#endifint PKCS12_key_gen_asc(const char *pass, int passlen, unsigned char *salt,	     int saltlen, int id, int iter, int n, unsigned char *out,	     const EVP_MD *md_type){	int ret;	unsigned char *unipass;	int uniplen;	if(!pass) {		unipass = NULL;		uniplen = 0;	} else if (!asc2uni(pass, passlen, &unipass, &uniplen)) {		PKCS12err(PKCS12_F_PKCS12_KEY_GEN_ASC,ERR_R_MALLOC_FAILURE);		return 0;	}	ret = PKCS12_key_gen_uni(unipass, uniplen, salt, saltlen,						 id, iter, n, out, md_type);	if(unipass) {		OPENSSL_cleanse(unipass, uniplen);	/* Clear password from memory */		OPENSSL_free(unipass);	}	return ret;}int PKCS12_key_gen_uni(unsigned char *pass, int passlen, unsigned char *salt,	     int saltlen, int id, int iter, int n, unsigned char *out,	     const EVP_MD *md_type){	unsigned char *B, *D, *I, *p, *Ai;	int Slen, Plen, Ilen, Ijlen;	int i, j, u, v;	BIGNUM *Ij, *Bpl1;	/* These hold Ij and B + 1 */	EVP_MD_CTX ctx;#ifdef  DEBUG_KEYGEN	unsigned char *tmpout = out;	int tmpn = n;#endif#if 0	if (!pass) {		PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_PASSED_NULL_PARAMETER);		return 0;	}#endif	EVP_MD_CTX_init(&ctx);#ifdef  DEBUG_KEYGEN	fprintf(stderr, "KEYGEN DEBUG\n");	fprintf(stderr, "ID %d, ITER %d\n", id, iter);	fprintf(stderr, "Password (length %d):\n", passlen);	h__dump(pass, passlen);	fprintf(stderr, "Salt (length %d):\n", saltlen);	h__dump(salt, saltlen);#endif	v = EVP_MD_block_size (md_type);	u = EVP_MD_size (md_type);	D = OPENSSL_malloc (v);	Ai = OPENSSL_malloc (u);	B = OPENSSL_malloc (v + 1);	Slen = v * ((saltlen+v-1)/v);	if(passlen) Plen = v * ((passlen+v-1)/v);	else Plen = 0;	Ilen = Slen + Plen;	I = OPENSSL_malloc (Ilen);	Ij = BN_new();	Bpl1 = BN_new();	if (!D || !Ai || !B || !I || !Ij || !Bpl1) {		PKCS12err(PKCS12_F_PKCS12_KEY_GEN_UNI,ERR_R_MALLOC_FAILURE);		return 0;	}	for (i = 0; i < v; i++) D[i] = id;	p = I;	for (i = 0; i < Slen; i++) *p++ = salt[i % saltlen];	for (i = 0; i < Plen; i++) *p++ = pass[i % passlen];	for (;;) {		EVP_DigestInit_ex(&ctx, md_type, NULL);		EVP_DigestUpdate(&ctx, D, v);		EVP_DigestUpdate(&ctx, I, Ilen);		EVP_DigestFinal_ex(&ctx, Ai, NULL);		for (j = 1; j < iter; j++) {			EVP_DigestInit_ex(&ctx, md_type, NULL);			EVP_DigestUpdate(&ctx, Ai, u);			EVP_DigestFinal_ex(&ctx, Ai, NULL);		}		memcpy (out, Ai, min (n, u));		if (u >= n) {			OPENSSL_free (Ai);			OPENSSL_free (B);			OPENSSL_free (D);			OPENSSL_free (I);			BN_free (Ij);			BN_free (Bpl1);			EVP_MD_CTX_cleanup(&ctx);#ifdef DEBUG_KEYGEN			fprintf(stderr, "Output KEY (length %d)\n", tmpn);			h__dump(tmpout, tmpn);#endif			return 1;			}		n -= u;		out += u;		for (j = 0; j < v; j++) B[j] = Ai[j % u];		/* Work out B + 1 first then can use B as tmp space */		BN_bin2bn (B, v, Bpl1);		BN_add_word (Bpl1, 1);		for (j = 0; j < Ilen ; j+=v) {			BN_bin2bn (I + j, v, Ij);			BN_add (Ij, Ij, Bpl1);			BN_bn2bin (Ij, B);			Ijlen = BN_num_bytes (Ij);			/* If more than 2^(v*8) - 1 cut off MSB */			if (Ijlen > v) {				BN_bn2bin (Ij, B);				memcpy (I + j, B + 1, v);#ifndef PKCS12_BROKEN_KEYGEN			/* If less than v bytes pad with zeroes */			} else if (Ijlen < v) {				memset(I + j, 0, v - Ijlen);				BN_bn2bin(Ij, I + j + v - Ijlen); #endif			} else BN_bn2bin (Ij, I + j);		}	}}#ifdef DEBUG_KEYGENvoid h__dump (unsigned char *p, int len){	for (; len --; p++) fprintf(stderr, "%02X", *p);	fprintf(stderr, "\n");	}#endif