Extend PBE code to support non default PKCS#5 v2.0 PRFs.

[thirdparty/openssl.git] / crypto / evp / evp_pbe.c

/* evp_pbe.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
 * project 1999.
 */
/* ====================================================================
 * Copyright (c) 1999-2006 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. 
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 * 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.
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 * 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/)"
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    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
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 *
 * 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_type;
	int pbe_nid;
	int cipher_nid;
	int md_nid;
	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)
	{
	const EVP_CIPHER *cipher;
	const EVP_MD *md;
	int cipher_nid, md_nid;
	EVP_PBE_KEYGEN *keygen;

	if (!EVP_PBE_find(EVP_PBE_TYPE_OUTER, OBJ_obj2nid(pbe_obj),
					&cipher_nid, &md_nid, &keygen))
		{
		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);

	if (cipher_nid == -1)
		cipher = NULL;
	else
		cipher = EVP_get_cipherbynid(cipher_nid);

	if (md_nid == -1)
		md = NULL;
	else
		md = EVP_get_digestbynid(md_nid);

	if (!keygen(ctx, pass, passlen, param, cipher, md, en_de))
		{
		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)
	{
	const EVP_PBE_CTL * const *pbe1 = (const EVP_PBE_CTL * const *) a,
			* const *pbe2 = (const EVP_PBE_CTL * const *)b;
	int ret = (*pbe1)->pbe_type - (*pbe2)->pbe_type;
	if (ret)
		return ret;
	else
		return (*pbe1)->pbe_nid - (*pbe2)->pbe_nid;
	}

/* Add a PBE algorithm */

int EVP_PBE_alg_add_type(int pbe_type, int pbe_nid, int cipher_nid, int md_nid,
	     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_type = pbe_type;
	pbe_tmp->pbe_nid = pbe_nid;
	pbe_tmp->cipher_nid = cipher_nid;
	pbe_tmp->md_nid = md_nid;
	pbe_tmp->keygen = keygen;


	sk_push (pbe_algs, (char *)pbe_tmp);
	return 1;
	}

int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
	     EVP_PBE_KEYGEN *keygen)
	{
	int cipher_nid, md_nid;
	if (cipher)
		cipher_nid = EVP_CIPHER_type(cipher);
	else
		cipher_nid = -1;
	if (md)
		md_nid = EVP_MD_type(md);
	else
		md_nid = -1;

	return EVP_PBE_alg_add_type(EVP_PBE_TYPE_OUTER, nid,
					cipher_nid, md_nid, keygen);
	}

int EVP_PBE_find(int type, int pbe_nid,
			int *pcnid, int *pmnid, EVP_PBE_KEYGEN **pkeygen)
	{
	EVP_PBE_CTL *pbetmp, pbelu;
	int i;
	if (pbe_nid == NID_undef)
		return 0;
	pbelu.pbe_type = type;
	pbelu.pbe_nid = pbe_nid;
	i = sk_find(pbe_algs, (char *)&pbelu);
	if (i == -1)
		return 0;
	pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);
	if (pcnid)
		*pcnid = pbetmp->cipher_nid;
	if (pmnid)
		*pmnid = pbetmp->md_nid;
	if (pkeygen)
		*pkeygen = pbetmp->keygen;
	return 1;
	}
		


void EVP_PBE_cleanup(void)
	{
	sk_pop_free(pbe_algs, OPENSSL_freeFunc);
	pbe_algs = NULL;
	}