/* evp_pbe.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/evp.h>#include <openssl/x509.h>/* Password based encryption (PBE) functions */static STACK *pbe_algs;/* Setup a cipher context from a PBE algorithm */typedef struct {int pbe_nid;const EVP_CIPHER *cipher;const EVP_MD *md;EVP_PBE_KEYGEN *keygen;} EVP_PBE_CTL;int EVP_PBE_CipherInit (ASN1_OBJECT *pbe_obj, const char *pass, int passlen,	     ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de){	EVP_PBE_CTL *pbetmp, pbelu;	int i;	pbelu.pbe_nid = OBJ_obj2nid(pbe_obj);	if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu);	else i = -1;	if (i == -1) {		char obj_tmp[80];		EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM);		if (!pbe_obj) BUF_strlcpy (obj_tmp, "NULL", sizeof obj_tmp);		else i2t_ASN1_OBJECT(obj_tmp, sizeof obj_tmp, pbe_obj);		ERR_add_error_data(2, "TYPE=", obj_tmp);		return 0;	}	if(!pass) passlen = 0;	else if (passlen == -1) passlen = strlen(pass);	pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);	i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher,						 pbetmp->md, en_de);	if (!i) {		EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);		return 0;	}	return 1;	}static int pbe_cmp(const char * const *a, const char * const *b){	EVP_PBE_CTL **pbe1 = (EVP_PBE_CTL **) a,  **pbe2 = (EVP_PBE_CTL **)b;	return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid);}/* Add a PBE algorithm */int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,	     EVP_PBE_KEYGEN *keygen){	EVP_PBE_CTL *pbe_tmp;	if (!pbe_algs) pbe_algs = sk_new(pbe_cmp);	if (!(pbe_tmp = (EVP_PBE_CTL*) OPENSSL_malloc (sizeof(EVP_PBE_CTL)))) {		EVPerr(EVP_F_EVP_PBE_ALG_ADD,ERR_R_MALLOC_FAILURE);		return 0;	}	pbe_tmp->pbe_nid = nid;	pbe_tmp->cipher = cipher;	pbe_tmp->md = md;	pbe_tmp->keygen = keygen;	sk_push (pbe_algs, (char *)pbe_tmp);	return 1;}void EVP_PBE_cleanup(void){	sk_pop_free(pbe_algs, OPENSSL_freeFunc);	pbe_algs = NULL;}