/* crypto/asn1/n_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.]

  */

  /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include <stdio.h>

 #include "cryptlib.h"

 #ifndef OPENSSL_NO_RSA

 #include <openssl/rsa.h>

 #include <openssl/objects.h>

 #include <openssl/asn1t.h>

 #include <openssl/asn1_mac.h>

 #include <openssl/evp.h>

 #include <openssl/x509.h>

 #ifndef OPENSSL_NO_RC4

 typedef struct netscape_pkey_st

 	{

 	long version;

 	X509_ALGOR *algor;

 	ASN1_OCTET_STRING *private_key;

 	} NETSCAPE_PKEY;

 typedef struct netscape_encrypted_pkey_st

 	{

 	ASN1_OCTET_STRING *os;

 	/* This is the same structure as DigestInfo so use it:

 	 * although this isn't really anything to do with

 	 * digests.

 	 */

 	X509_SIG *enckey;

 	} NETSCAPE_ENCRYPTED_PKEY;

 ASN1_BROKEN_SEQUENCE(NETSCAPE_ENCRYPTED_PKEY) = {

 	ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, os, ASN1_OCTET_STRING),

 	ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, enckey, X509_SIG)

 } ASN1_BROKEN_SEQUENCE_END(NETSCAPE_ENCRYPTED_PKEY)

 DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)

 DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY)

 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)

 ASN1_SEQUENCE(NETSCAPE_PKEY) = {

 	ASN1_SIMPLE(NETSCAPE_PKEY, version, LONG),

 	ASN1_SIMPLE(NETSCAPE_PKEY, algor, X509_ALGOR),

 	ASN1_SIMPLE(NETSCAPE_PKEY, private_key, ASN1_OCTET_STRING)

 } ASN1_SEQUENCE_END(NETSCAPE_PKEY)

 DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)

 DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY)

 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)

 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,

 			  int (*cb)(char *buf, int len, const char *prompt,

 				    int verify),

 			  int sgckey);

 EXPORT_C int i2d_Netscape_RSA(const RSA *a, unsigned char **pp,

 		     int (*cb)(char *buf, int len, const char *prompt,

 			       int verify))

 {

 	return i2d_RSA_NET(a, pp, cb, 0);

 }

 EXPORT_C int i2d_RSA_NET(const RSA *a, unsigned char **pp,

 		int (*cb)(char *buf, int len, const char *prompt, int verify),

 		int sgckey)

 	{

 	int i, j, ret = 0;

 	int rsalen, pkeylen, olen;

 	NETSCAPE_PKEY *pkey = NULL;

 	NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;

 	unsigned char buf[256],*zz;

 	unsigned char key[EVP_MAX_KEY_LENGTH];

 	EVP_CIPHER_CTX ctx;

 	if (a == NULL) return(0);

 	if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;

 	if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err;

 	pkey->version = 0;

 	pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);

 	if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;

 	pkey->algor->parameter->type=V_ASN1_NULL;

 	rsalen = i2d_RSAPrivateKey(a, NULL);

 	/* Fake some octet strings just for the initial length

 	 * calculation.

  	 */

 	pkey->private_key->length=rsalen;

 	pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL);

 	enckey->enckey->digest->length = pkeylen;

 	enckey->os->length = 11;	/* "private-key" */

 	enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4);

 	if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;

 	enckey->enckey->algor->parameter->type=V_ASN1_NULL;

 	if (pp == NULL)

 		{

 		olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);

 		NETSCAPE_PKEY_free(pkey);

 		NETSCAPE_ENCRYPTED_PKEY_free(enckey);

 		return olen;

 		}

 	/* Since its RC4 encrypted length is actual length */

 	if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL)

 		{

 		ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	pkey->private_key->data = zz;

 	/* Write out private key encoding */

 	i2d_RSAPrivateKey(a,&zz);

 	if ((zz=OPENSSL_malloc(pkeylen)) == NULL)

 		{

 		ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	if (!ASN1_STRING_set(enckey->os, "private-key", -1)) 

 		{

 		ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	enckey->enckey->digest->data = zz;

 	i2d_NETSCAPE_PKEY(pkey,&zz);

 	/* Wipe the private key encoding */

 	OPENSSL_cleanse(pkey->private_key->data, rsalen);

 	if (cb == NULL)

 		cb=EVP_read_pw_string;

 	i=cb((char *)buf,256,"Enter Private Key password:",1);

 	if (i != 0)

 		{

 		ASN1err(ASN1_F_I2D_RSA_NET,ASN1_R_BAD_PASSWORD_READ);

 		goto err;

 		}

 	i = strlen((char *)buf);

 	/* If the key is used for SGC the algorithm is modified a little. */

 	if(sgckey) {

 		EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);

 		memcpy(buf + 16, "SGCKEYSALT", 10);

 		i = 26;

 	}

 	EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);

 	OPENSSL_cleanse(buf,256);

 	/* Encrypt private key in place */

 	zz = enckey->enckey->digest->data;

 	EVP_CIPHER_CTX_init(&ctx);

 	EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL);

 	EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen);

 	EVP_EncryptFinal_ex(&ctx,zz + i,&j);

 	EVP_CIPHER_CTX_cleanup(&ctx);

 	ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);

 err:

 	NETSCAPE_ENCRYPTED_PKEY_free(enckey);

 	NETSCAPE_PKEY_free(pkey);

 	return(ret);

 	}

 EXPORT_C RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length,

 		      int (*cb)(char *buf, int len, const char *prompt,

 				int verify))

 {

 	return d2i_RSA_NET(a, pp, length, cb, 0);

 }

 EXPORT_C RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length,

 		 int (*cb)(char *buf, int len, const char *prompt, int verify),

 		 int sgckey)

 	{

 	RSA *ret=NULL;

 	const unsigned char *p, *kp;

 	NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;

 	p = *pp;

 	enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);

 	if(!enckey) {

 		ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_DECODING_ERROR);

 		return NULL;

 	}

 	if ((enckey->os->length != 11) || (strncmp("private-key",

 		(char *)enckey->os->data,11) != 0))

 		{

 		ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_PRIVATE_KEY_HEADER_MISSING);

 		NETSCAPE_ENCRYPTED_PKEY_free(enckey);

 		return NULL;

 		}

 	if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4)

 		{

 		ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);

 		goto err;

 	}

 	kp = enckey->enckey->digest->data;

 	if (cb == NULL)

 		cb=EVP_read_pw_string;

 	if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;

 	*pp = p;

 	err:

 	NETSCAPE_ENCRYPTED_PKEY_free(enckey);

 	return ret;

 	}

 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,

 			  int (*cb)(char *buf, int len, const char *prompt,

 				    int verify), int sgckey)

 	{

 	NETSCAPE_PKEY *pkey=NULL;

 	RSA *ret=NULL;

 	int i,j;

 	unsigned char buf[256];

 	const unsigned char *zz;

 	unsigned char key[EVP_MAX_KEY_LENGTH];

 	EVP_CIPHER_CTX ctx;

 	i=cb((char *)buf,256,"Enter Private Key password:",0);

 	if (i != 0)

 		{

 		ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ);

 		goto err;

 		}

 	i = strlen((char *)buf);

 	if(sgckey){

 		EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);

 		memcpy(buf + 16, "SGCKEYSALT", 10);

 		i = 26;

 	}

 	EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);

 	OPENSSL_cleanse(buf,256);

 	EVP_CIPHER_CTX_init(&ctx);

 	EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL);

 	EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);

 	EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j);

 	EVP_CIPHER_CTX_cleanup(&ctx);

 	os->length=i+j;

 	zz=os->data;

 	if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)

 		{

 		ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);

 		goto err;

 		}

 	zz=pkey->private_key->data;

 	if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)

 		{

 		ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);

 		goto err;

 		}

 err:

 	NETSCAPE_PKEY_free(pkey);

 	return(ret);

 	}

 #endif /* OPENSSL_NO_RC4 */

 #else /* !OPENSSL_NO_RSA */

 # if PEDANTIC

 static void *dummy=&dummy;

 # endif

 #endif