/* crypto/pem/pem_pkey.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 <openssl/buffer.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/rand.h>

#include <openssl/x509.h>

#include <openssl/pkcs12.h>

#include <openssl/pem.h>

static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,

				int nid, const EVP_CIPHER *enc,

				char *kstr, int klen,

				pem_password_cb *cb, void *u);

static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,

				int nid, const EVP_CIPHER *enc,

				char *kstr, int klen,

				pem_password_cb *cb, void *u);

/* These functions write a private key in PKCS#8 format: it is a "drop in"

 * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'

 * is NULL then it uses the unencrypted private key form. The 'nid' versions

 * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.

 */

EXPORT_C int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);

}

EXPORT_C int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);

}

EXPORT_C int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);

}

EXPORT_C int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);

}

static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	X509_SIG *p8;

	PKCS8_PRIV_KEY_INFO *p8inf;

	char buf[PEM_BUFSIZE];

	int ret;

	if(!(p8inf = EVP_PKEY2PKCS8(x))) {

		PEMerr(PEM_F_DO_PK8PKEY,

					PEM_R_ERROR_CONVERTING_PRIVATE_KEY);

		return 0;

	}

	if(enc || (nid != -1)) {

		if(!kstr) {

			if(!cb) klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);

			else klen = cb(buf, PEM_BUFSIZE, 1, u);

			if(klen <= 0) {

				PEMerr(PEM_F_DO_PK8PKEY,PEM_R_READ_KEY);

				PKCS8_PRIV_KEY_INFO_free(p8inf);

				return 0;

			}

			kstr = buf;

		}

		p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);

		if(kstr == buf) OPENSSL_cleanse(buf, klen);

		PKCS8_PRIV_KEY_INFO_free(p8inf);

		if(isder) ret = i2d_PKCS8_bio(bp, p8);

		else ret = PEM_write_bio_PKCS8(bp, p8);

		X509_SIG_free(p8);

		return ret;

	} else {

		if(isder) ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);

		else ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);

		PKCS8_PRIV_KEY_INFO_free(p8inf);

		return ret;

	}

}

EXPORT_C EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)

{

	PKCS8_PRIV_KEY_INFO *p8inf = NULL;

	X509_SIG *p8 = NULL;

	int klen;

	EVP_PKEY *ret;

	char psbuf[PEM_BUFSIZE];

	p8 = d2i_PKCS8_bio(bp, NULL);

/* NOTE!!!!! - 12/2/09

 *

 * Not sure this is bug or intentional in the code to enforce the key storage in file should be password protected.

 * Be carefull while merging this code with any latest OpenSSL streams in the future. 

 * -Madhu

*/

#if 0 //bug fix, unencryted private key read - START - 12/2/09

	if(!p8) return NULL;

	if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);

	else klen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);

	if (klen <= 0) {

		PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);

#endif //bug fix, unencryted private key read - END - 12/2/09		

		if (!p8) {

       /* try unencrypted */

       BIO_reset(bp);

       p8inf = d2i_PKCS8_PRIV_KEY_INFO_bio(bp, NULL);

		} else {

       if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);

       else klen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);

       if (klen <= 0) {

               PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);

               X509_SIG_free(p8);

               return NULL;

       }

      p8inf = PKCS8_decrypt(p8, psbuf, klen);

    }

			X509_SIG_free(p8);

//			return NULL;	//bug fix, unencryted private key read - 12/2/09               

#if 0 //bug fix, unencryted private key read - START - 12/2/09               

		p8inf = PKCS8_decrypt(p8, psbuf, klen);

	  X509_SIG_free(p8); 

#endif 	//bug fix, unencryted private key read - END - 12/2/09               

	if(!p8inf) return NULL;

	ret = EVP_PKCS82PKEY(p8inf);

	PKCS8_PRIV_KEY_INFO_free(p8inf);

	if(!ret) return NULL;

	if(x) {

		if(*x) EVP_PKEY_free(*x);

		*x = ret;

	}

	return ret;

}

#ifndef OPENSSL_NO_FP_API

EXPORT_C int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);

}

EXPORT_C int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);

}

EXPORT_C int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);

}

EXPORT_C int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,

			      char *kstr, int klen, pem_password_cb *cb, void *u)

{

	return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);

}

static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,

				  char *kstr, int klen,

				  pem_password_cb *cb, void *u)

{

	BIO *bp;

	int ret;

	if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {

		PEMerr(PEM_F_DO_PK8PKEY_FP,ERR_R_BUF_LIB);

                return(0);

	}

	ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);

	BIO_free(bp);

	return ret;

}

EXPORT_C EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)

{

	BIO *bp;

	EVP_PKEY *ret;

	if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {

		PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP,ERR_R_BUF_LIB);

                return NULL;

	}

	ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);

	BIO_free(bp);

	return ret;

}

#endif

IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)

IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,

							 PKCS8_PRIV_KEY_INFO)