/* 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.]
 */
/* ====================================================================
 * Copyright (c) 1998-2002 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
 *    openssl-core@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 <openssl/bio.h>
#include <openssl/dh.h>
#include <openssl/dsa.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
/*#include <openssl/pkcs7.h> */
#include <openssl/rsa.h>
#include <openssl/x509.h>


static RSA *pkey_get_rsa(EVP_PKEY *key, RSA **rsa);
static DSA *pkey_get_dsa(EVP_PKEY *key, DSA **dsa);
static EC_KEY *pkey_get_eckey(EVP_PKEY *key, EC_KEY **eckey);


IMPLEMENT_PEM_rw(X509_REQ, X509_REQ, PEM_STRING_X509_REQ, X509_REQ)

IMPLEMENT_PEM_write(X509_REQ_NEW, X509_REQ, PEM_STRING_X509_REQ_OLD, X509_REQ)

IMPLEMENT_PEM_rw(X509_CRL, X509_CRL, PEM_STRING_X509_CRL, X509_CRL)


#ifndef OPENSSL_NO_RSA

/* We treat RSA or DSA private keys as a special case.
 *
 * For private keys we read in an EVP_PKEY structure with
 * PEM_read_bio_PrivateKey() and extract the relevant private
 * key: this means can handle "traditional" and PKCS#8 formats
 * transparently.
 */

static RSA *pkey_get_rsa(EVP_PKEY *key, RSA **rsa)
{
	RSA *rtmp;
	if(!key) return NULL;
	rtmp = EVP_PKEY_get1_RSA(key);
	EVP_PKEY_free(key);
	if(!rtmp) return NULL;
	if(rsa) {
		RSA_free(*rsa);
		*rsa = rtmp;
	}
	return rtmp;
}

RSA *PEM_read_bio_RSAPrivateKey(BIO *bp, RSA **rsa, pem_password_cb *cb,
								void *u)
{
	EVP_PKEY *pktmp;
	pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);
	return pkey_get_rsa(pktmp, rsa);
}

#ifndef OPENSSL_NO_FP_API

RSA *PEM_read_RSAPrivateKey(FILE *fp, RSA **rsa, pem_password_cb *cb,
								void *u)
{
	EVP_PKEY *pktmp;
	pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);
	return pkey_get_rsa(pktmp, rsa);
}

#endif

#ifdef OPENSSL_FIPS

int PEM_write_bio_RSAPrivateKey(BIO *bp, RSA *x, const EVP_CIPHER *enc,
                                               unsigned char *kstr, int klen,
                                               pem_password_cb *cb, void *u)
{
	if (FIPS_mode())
		{
		EVP_PKEY *k;
		int ret;
		k = EVP_PKEY_new();
		if (!k)
			return 0;
		EVP_PKEY_set1_RSA(k, x);

		ret = PEM_write_bio_PrivateKey(bp, k, enc, kstr, klen, cb, u);
		EVP_PKEY_free(k);
		return ret;
		}
	else
		return PEM_ASN1_write_bio((i2d_of_void *)i2d_RSAPrivateKey,
					PEM_STRING_RSA,bp,x,enc,kstr,klen,cb,u);
}

#ifndef OPENSSL_NO_FP_API
int PEM_write_RSAPrivateKey(FILE *fp, RSA *x, const EVP_CIPHER *enc,
                                               unsigned char *kstr, int klen,
                                               pem_password_cb *cb, void *u)
{
	if (FIPS_mode())
		{
		EVP_PKEY *k;
		int ret;
		k = EVP_PKEY_new();
		if (!k)
			return 0;

		EVP_PKEY_set1_RSA(k, x);

		ret = PEM_write_PrivateKey(fp, k, enc, kstr, klen, cb, u);
		EVP_PKEY_free(k);
		return ret;
		}
	else
		return PEM_ASN1_write((i2d_of_void *)i2d_RSAPrivateKey,
					PEM_STRING_RSA,fp,x,enc,kstr,klen,cb,u);
}
#endif

#else

IMPLEMENT_PEM_write_cb_const(RSAPrivateKey, RSA, PEM_STRING_RSA, RSAPrivateKey)

#endif

IMPLEMENT_PEM_rw_const(RSAPublicKey, RSA, PEM_STRING_RSA_PUBLIC, RSAPublicKey)
IMPLEMENT_PEM_rw(RSA_PUBKEY, RSA, PEM_STRING_PUBLIC, RSA_PUBKEY)

#endif

#ifndef OPENSSL_NO_DSA

static DSA *pkey_get_dsa(EVP_PKEY *key, DSA **dsa)
{
	DSA *dtmp;
	if(!key) return NULL;
	dtmp = EVP_PKEY_get1_DSA(key);
	EVP_PKEY_free(key);
	if(!dtmp) return NULL;
	if(dsa) {
		DSA_free(*dsa);
		*dsa = dtmp;
	}
	return dtmp;
}

DSA *PEM_read_bio_DSAPrivateKey(BIO *bp, DSA **dsa, pem_password_cb *cb,
								void *u)
{
	EVP_PKEY *pktmp;
	pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);
	return pkey_get_dsa(pktmp, dsa);	/* will free pktmp */
}

#ifdef OPENSSL_FIPS

int PEM_write_bio_DSAPrivateKey(BIO *bp, DSA *x, const EVP_CIPHER *enc,
                                               unsigned char *kstr, int klen,
                                               pem_password_cb *cb, void *u)
{
	if (FIPS_mode())
		{
		EVP_PKEY *k;
		int ret;
		k = EVP_PKEY_new();
		if (!k)
			return 0;
		EVP_PKEY_set1_DSA(k, x);

		ret = PEM_write_bio_PrivateKey(bp, k, enc, kstr, klen, cb, u);
		EVP_PKEY_free(k);
		return ret;
		}
	else
		return PEM_ASN1_write_bio((i2d_of_void *)i2d_DSAPrivateKey,
					PEM_STRING_DSA,bp,x,enc,kstr,klen,cb,u);
}

#ifndef OPENSSL_NO_FP_API
int PEM_write_DSAPrivateKey(FILE *fp, DSA *x, const EVP_CIPHER *enc,
                                               unsigned char *kstr, int klen,
                                               pem_password_cb *cb, void *u)
{
	if (FIPS_mode())
		{
		EVP_PKEY *k;
		int ret;
		k = EVP_PKEY_new();
		if (!k)
			return 0;
		EVP_PKEY_set1_DSA(k, x);
		ret = PEM_write_PrivateKey(fp, k, enc, kstr, klen, cb, u);
		EVP_PKEY_free(k);
		return ret;
		}
	else
		return PEM_ASN1_write((i2d_of_void *)i2d_DSAPrivateKey,
					PEM_STRING_DSA,fp,x,enc,kstr,klen,cb,u);
}
#endif

#else

IMPLEMENT_PEM_write_cb_const(DSAPrivateKey, DSA, PEM_STRING_DSA, DSAPrivateKey)

#endif

IMPLEMENT_PEM_rw(DSA_PUBKEY, DSA, PEM_STRING_PUBLIC, DSA_PUBKEY)

#ifndef OPENSSL_NO_FP_API

DSA *PEM_read_DSAPrivateKey(FILE *fp, DSA **dsa, pem_password_cb *cb,
								void *u)
{
	EVP_PKEY *pktmp;
	pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);
	return pkey_get_dsa(pktmp, dsa);	/* will free pktmp */
}

#endif

IMPLEMENT_PEM_rw_const(DSAparams, DSA, PEM_STRING_DSAPARAMS, DSAparams)

#endif


#ifndef OPENSSL_NO_EC
static EC_KEY *pkey_get_eckey(EVP_PKEY *key, EC_KEY **eckey)
{
	EC_KEY *dtmp;
	if(!key) return NULL;
	dtmp = EVP_PKEY_get1_EC_KEY(key);
	EVP_PKEY_free(key);
	if(!dtmp) return NULL;
	if(eckey) 
	{
 		EC_KEY_free(*eckey);
		*eckey = dtmp;
	}
	return dtmp;
}

EC_KEY *PEM_read_bio_ECPrivateKey(BIO *bp, EC_KEY **key, pem_password_cb *cb,
							void *u)
{
	EVP_PKEY *pktmp;
	pktmp = PEM_read_bio_PrivateKey(bp, NULL, cb, u);
	return pkey_get_eckey(pktmp, key);	/* will free pktmp */
}

/* TODO(fork): remove this code? */
/* IMPLEMENT_PEM_rw_const(ECPKParameters, EC_GROUP, PEM_STRING_ECPARAMETERS, ECPKParameters) */


#ifdef OPENSSL_FIPS

int PEM_write_bio_ECPrivateKey(BIO *bp, EC_KEY *x, const EVP_CIPHER *enc,
                                               unsigned char *kstr, int klen,
                                               pem_password_cb *cb, void *u)
{
	if (FIPS_mode())
		{
		EVP_PKEY *k;
		int ret;
		k = EVP_PKEY_new();
		if (!k)
			return 0;
		EVP_PKEY_set1_EC_KEY(k, x);

		ret = PEM_write_bio_PrivateKey(bp, k, enc, kstr, klen, cb, u);
		EVP_PKEY_free(k);
		return ret;
		}
	else
		return PEM_ASN1_write_bio((i2d_of_void *)i2d_ECPrivateKey,
						PEM_STRING_ECPRIVATEKEY,
						bp,x,enc,kstr,klen,cb,u);
}

#ifndef OPENSSL_NO_FP_API
int PEM_write_ECPrivateKey(FILE *fp, EC_KEY *x, const EVP_CIPHER *enc,
                                               unsigned char *kstr, int klen,
                                               pem_password_cb *cb, void *u)
{
	if (FIPS_mode())
		{
		EVP_PKEY *k;
		int ret;
		k = EVP_PKEY_new();
		if (!k)
			return 0;
		EVP_PKEY_set1_EC_KEY(k, x);
		ret = PEM_write_PrivateKey(fp, k, enc, kstr, klen, cb, u);
		EVP_PKEY_free(k);
		return ret;
		}
	else
		return PEM_ASN1_write((i2d_of_void *)i2d_ECPrivateKey,
						PEM_STRING_ECPRIVATEKEY,
						fp,x,enc,kstr,klen,cb,u);
}
#endif

#else

IMPLEMENT_PEM_write_cb(ECPrivateKey, EC_KEY, PEM_STRING_ECPRIVATEKEY, ECPrivateKey)

#endif

IMPLEMENT_PEM_rw(EC_PUBKEY, EC_KEY, PEM_STRING_PUBLIC, EC_PUBKEY)

#ifndef OPENSSL_NO_FP_API
 
EC_KEY *PEM_read_ECPrivateKey(FILE *fp, EC_KEY **eckey, pem_password_cb *cb,
 								void *u)
{
	EVP_PKEY *pktmp;
	pktmp = PEM_read_PrivateKey(fp, NULL, cb, u);
	return pkey_get_eckey(pktmp, eckey);	/* will free pktmp */
}

#endif

#endif

#ifndef OPENSSL_NO_DH

IMPLEMENT_PEM_write_const(DHparams, DH, PEM_STRING_DHPARAMS, DHparams)

/* TODO(fork): remove this code? */
/* IMPLEMENT_PEM_write_const(DHxparams, DH, PEM_STRING_DHXPARAMS, DHxparams) */

#endif

IMPLEMENT_PEM_rw(PUBKEY, EVP_PKEY, PEM_STRING_PUBLIC, PUBKEY)