/* 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)