softDecryptUtil.c revision 726fad2a65f16c200a03969c29cb5c86c2d427db
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <security/cryptoki.h>
#include <modes/modes.h>
#include <arcfour.h>
#include "softSession.h"
#include "softObject.h"
#include "softOps.h"
#include "softCrypt.h"
#include "softRSA.h"
/*
* Remove padding bytes.
*/
CK_RV
soft_remove_pkcs7_padding(CK_BYTE *pData, CK_ULONG padded_len,
CK_ULONG *pulDataLen)
{
CK_RV rv;
#ifdef __sparcv9
if ((rv = pkcs7_decode(pData, (&padded_len))) != CKR_OK)
#else /* !__sparcv9 */
if ((rv = pkcs7_decode(pData, (size_t *)(&padded_len))) != CKR_OK)
#endif /* __sparcv9 */
return (rv);
*pulDataLen = padded_len;
return (CKR_OK);
}
/*
* soft_decrypt_init()
*
* Arguments:
* session_p: pointer to soft_session_t struct
* pMechanism: pointer to CK_MECHANISM struct provided by application
* key_p: pointer to key soft_object_t struct
*
* Description:
* called by C_DecryptInit(). This function calls the corresponding
* decrypt init routine based on the mechanism.
*
* Returns:
* CKR_OK: success
* CKR_HOST_MEMORY: run out of system memory
* CKR_MECHANISM_PARAM_INVALID: invalid parameters in mechanism
* CKR_MECHANISM_INVALID: invalid mechanism type
* CKR_KEY_TYPE_INCONSISTENT: incorrect type of key to use
* with the specified mechanism
*/
CK_RV
soft_decrypt_init(soft_session_t *session_p, CK_MECHANISM_PTR pMechanism,
soft_object_t *key_p)
{
CK_RV rv;
switch (pMechanism->mechanism) {
case CKM_DES_ECB:
if (key_p->key_type != CKK_DES) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
goto ecb_common;
case CKM_DES3_ECB:
if ((key_p->key_type != CKK_DES2) &&
(key_p->key_type != CKK_DES3)) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
ecb_common:
return (soft_des_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE));
case CKM_DES_CBC:
case CKM_DES_CBC_PAD:
if (key_p->key_type != CKK_DES) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
goto cbc_common;
case CKM_DES3_CBC:
case CKM_DES3_CBC_PAD:
{
soft_des_ctx_t *soft_des_ctx;
if ((key_p->key_type != CKK_DES2) &&
(key_p->key_type != CKK_DES3)) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
cbc_common:
if ((pMechanism->pParameter == NULL) ||
(pMechanism->ulParameterLen != DES_BLOCK_LEN)) {
return (CKR_MECHANISM_PARAM_INVALID);
}
rv = soft_des_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE);
if (rv != CKR_OK)
return (rv);
(void) pthread_mutex_lock(&session_p->session_mutex);
soft_des_ctx = (soft_des_ctx_t *)session_p->decrypt.context;
/* Save Initialization Vector (IV) in the context. */
(void) memcpy(soft_des_ctx->ivec, pMechanism->pParameter,
DES_BLOCK_LEN);
/* Allocate a context for DES cipher-block chaining. */
soft_des_ctx->des_cbc = (void *)des_cbc_ctx_init(
soft_des_ctx->key_sched, soft_des_ctx->keysched_len,
soft_des_ctx->ivec, key_p->key_type);
if (soft_des_ctx->des_cbc == NULL) {
bzero(soft_des_ctx->key_sched,
soft_des_ctx->keysched_len);
free(soft_des_ctx->key_sched);
free(session_p->decrypt.context);
session_p->decrypt.context = NULL;
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (CKR_HOST_MEMORY);
}
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (rv);
}
case CKM_AES_ECB:
if (key_p->key_type != CKK_AES) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
return (soft_aes_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE));
case CKM_AES_CBC:
case CKM_AES_CBC_PAD:
{
soft_aes_ctx_t *soft_aes_ctx;
if (key_p->key_type != CKK_AES) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
if ((pMechanism->pParameter == NULL) ||
(pMechanism->ulParameterLen != AES_BLOCK_LEN)) {
return (CKR_MECHANISM_PARAM_INVALID);
}
rv = soft_aes_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE);
if (rv != CKR_OK)
return (rv);
(void) pthread_mutex_lock(&session_p->session_mutex);
soft_aes_ctx = (soft_aes_ctx_t *)session_p->decrypt.context;
/* Save Initialization Vector (IV) in the context. */
(void) memcpy(soft_aes_ctx->ivec, pMechanism->pParameter,
AES_BLOCK_LEN);
/* Allocate a context for AES cipher-block chaining. */
soft_aes_ctx->aes_cbc = (void *)aes_cbc_ctx_init(
soft_aes_ctx->key_sched, soft_aes_ctx->keysched_len,
soft_aes_ctx->ivec);
if (soft_aes_ctx->aes_cbc == NULL) {
bzero(soft_aes_ctx->key_sched,
soft_aes_ctx->keysched_len);
free(soft_aes_ctx->key_sched);
free(session_p->decrypt.context);
session_p->decrypt.context = NULL;
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (CKR_HOST_MEMORY);
}
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (rv);
}
case CKM_AES_CTR:
{
soft_aes_ctx_t *soft_aes_ctx;
if (key_p->key_type != CKK_AES) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
if (pMechanism->pParameter == NULL ||
pMechanism->ulParameterLen != sizeof (CK_AES_CTR_PARAMS)) {
return (CKR_MECHANISM_PARAM_INVALID);
}
rv = soft_aes_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE);
if (rv != CKR_OK)
return (rv);
(void) pthread_mutex_lock(&session_p->session_mutex);
soft_aes_ctx = (soft_aes_ctx_t *)session_p->decrypt.context;
soft_aes_ctx->aes_cbc = aes_ctr_ctx_init(
soft_aes_ctx->key_sched, soft_aes_ctx->keysched_len,
pMechanism->pParameter);
if (soft_aes_ctx->aes_cbc == NULL) {
bzero(soft_aes_ctx->key_sched,
soft_aes_ctx->keysched_len);
free(soft_aes_ctx->key_sched);
free(session_p->decrypt.context);
session_p->decrypt.context = NULL;
rv = CKR_HOST_MEMORY;
}
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (rv);
}
case CKM_BLOWFISH_CBC:
{
soft_blowfish_ctx_t *soft_blowfish_ctx;
if (key_p->key_type != CKK_BLOWFISH)
return (CKR_KEY_TYPE_INCONSISTENT);
if ((pMechanism->pParameter == NULL) ||
(pMechanism->ulParameterLen != BLOWFISH_BLOCK_LEN))
return (CKR_MECHANISM_PARAM_INVALID);
rv = soft_blowfish_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE);
if (rv != CKR_OK)
return (rv);
(void) pthread_mutex_lock(&session_p->session_mutex);
soft_blowfish_ctx =
(soft_blowfish_ctx_t *)session_p->decrypt.context;
/* Save Initialization Vector in the context. */
(void) memcpy(soft_blowfish_ctx->ivec, pMechanism->pParameter,
BLOWFISH_BLOCK_LEN);
/* Allocate a context for CBC */
soft_blowfish_ctx->blowfish_cbc =
(void *)blowfish_cbc_ctx_init(soft_blowfish_ctx->key_sched,
soft_blowfish_ctx->keysched_len,
soft_blowfish_ctx->ivec);
if (soft_blowfish_ctx->blowfish_cbc == NULL) {
bzero(soft_blowfish_ctx->key_sched,
soft_blowfish_ctx->keysched_len);
free(soft_blowfish_ctx->key_sched);
free(session_p->decrypt.context = NULL);
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (CKR_HOST_MEMORY);
}
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (rv);
}
case CKM_RC4:
if (key_p->key_type != CKK_RC4) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
return (soft_arcfour_crypt_init(session_p, pMechanism, key_p,
B_FALSE));
case CKM_RSA_X_509:
case CKM_RSA_PKCS:
if (key_p->key_type != CKK_RSA) {
return (CKR_KEY_TYPE_INCONSISTENT);
}
return (soft_rsa_crypt_init_common(session_p, pMechanism,
key_p, B_FALSE));
default:
return (CKR_MECHANISM_INVALID);
}
}
/*
* soft_decrypt_common()
*
* Arguments:
* session_p: pointer to soft_session_t struct
* pEncrypted: pointer to the encrypted data as input
* ulEncryptedLen: length of the input data
* pData: pointer to the output data contains plaintext
* pulDataLen: pointer to the length of the output data
* Update: boolean flag indicates caller is soft_decrypt
* or soft_decrypt_update
*
* Description:
* This function calls the corresponding decrypt routine based
* on the mechanism.
*
* Returns:
* see soft_decrypt_common().
*/
CK_RV
soft_decrypt_common(soft_session_t *session_p, CK_BYTE_PTR pEncrypted,
CK_ULONG ulEncryptedLen, CK_BYTE_PTR pData,
CK_ULONG_PTR pulDataLen, boolean_t Update)
{
CK_MECHANISM_TYPE mechanism = session_p->decrypt.mech.mechanism;
switch (mechanism) {
case CKM_DES_ECB:
case CKM_DES_CBC:
case CKM_DES3_ECB:
case CKM_DES3_CBC:
if (ulEncryptedLen == 0) {
*pulDataLen = 0;
return (CKR_OK);
}
/* FALLTHROUGH */
case CKM_DES_CBC_PAD:
case CKM_DES3_CBC_PAD:
return (soft_des_decrypt_common(session_p, pEncrypted,
ulEncryptedLen, pData, pulDataLen, Update));
case CKM_AES_ECB:
case CKM_AES_CBC:
case CKM_AES_CTR:
if (ulEncryptedLen == 0) {
*pulDataLen = 0;
return (CKR_OK);
}
/* FALLTHROUGH */
case CKM_AES_CBC_PAD:
return (soft_aes_decrypt_common(session_p, pEncrypted,
ulEncryptedLen, pData, pulDataLen, Update));
case CKM_BLOWFISH_CBC:
if (ulEncryptedLen == 0) {
*pulDataLen = 0;
return (CKR_OK);
}
return (soft_blowfish_decrypt_common(session_p, pEncrypted,
ulEncryptedLen, pData, pulDataLen, Update));
case CKM_RC4:
if (ulEncryptedLen == 0) {
*pulDataLen = 0;
return (CKR_OK);
}
return (soft_arcfour_crypt(&(session_p->decrypt), pEncrypted,
ulEncryptedLen, pData, pulDataLen));
case CKM_RSA_X_509:
case CKM_RSA_PKCS:
return (soft_rsa_decrypt_common(session_p, pEncrypted,
ulEncryptedLen, pData, pulDataLen, mechanism));
default:
return (CKR_MECHANISM_INVALID);
}
}
/*
* soft_decrypt()
*
* Arguments:
* session_p: pointer to soft_session_t struct
* pEncryptedData: pointer to the encrypted data as input
* ulEncryptedDataLen: length of the input data
* pData: pointer to the output data contains plaintext
* pulDataLen: pointer to the length of the output data
*
* Description:
* called by C_Decrypt(). This function calls the soft_decrypt_common
* routine.
*
* Returns:
* see soft_decrypt_common().
*/
CK_RV
soft_decrypt(soft_session_t *session_p, CK_BYTE_PTR pEncryptedData,
CK_ULONG ulEncryptedDataLen, CK_BYTE_PTR pData,
CK_ULONG_PTR pulDataLen)
{
return (soft_decrypt_common(session_p, pEncryptedData,
ulEncryptedDataLen, pData, pulDataLen, B_FALSE));
}
/*
* soft_decrypt_update()
*
* Arguments:
* session_p: pointer to soft_session_t struct
* pEncryptedPart: pointer to the encrypted data as input
* ulEncryptedPartLen: length of the input data
* pPart: pointer to the output data contains plaintext
* pulPartLen: pointer to the length of the output data
*
* Description:
* called by C_DecryptUpdate(). This function calls the
* soft_decrypt_common routine (with update flag on).
*
* Returns:
* see soft_decrypt_common().
*/
CK_RV
soft_decrypt_update(soft_session_t *session_p, CK_BYTE_PTR pEncryptedPart,
CK_ULONG ulEncryptedPartLen, CK_BYTE_PTR pPart,
CK_ULONG_PTR pulPartLen)
{
CK_MECHANISM_TYPE mechanism = session_p->decrypt.mech.mechanism;
switch (mechanism) {
case CKM_DES_ECB:
case CKM_DES_CBC:
case CKM_DES_CBC_PAD:
case CKM_DES3_ECB:
case CKM_DES3_CBC:
case CKM_DES3_CBC_PAD:
case CKM_AES_ECB:
case CKM_AES_CBC:
case CKM_AES_CBC_PAD:
case CKM_AES_CTR:
case CKM_BLOWFISH_CBC:
case CKM_RC4:
return (soft_decrypt_common(session_p, pEncryptedPart,
ulEncryptedPartLen, pPart, pulPartLen, B_TRUE));
default:
/* PKCS11: The mechanism only supports single-part operation. */
return (CKR_MECHANISM_INVALID);
}
}
/*
* soft_decrypt_final()
*
* Arguments:
* session_p: pointer to soft_session_t struct
* pLastPart: pointer to the last recovered data part
* pulLastPartLen: pointer to the length of the last recovered data part
*
* Description:
* called by C_DecryptFinal().
*
* Returns:
* CKR_OK: success
* CKR_FUNCTION_FAILED: decrypt final function failed
* CKR_ENCRYPTED_DATA_LEN_RANGE: remaining buffer contains bad length
*/
CK_RV
soft_decrypt_final(soft_session_t *session_p, CK_BYTE_PTR pLastPart,
CK_ULONG_PTR pulLastPartLen)
{
CK_MECHANISM_TYPE mechanism = session_p->decrypt.mech.mechanism;
CK_ULONG out_len;
CK_RV rv = CKR_OK;
int rc;
(void) pthread_mutex_lock(&session_p->session_mutex);
if (session_p->decrypt.context == NULL) {
rv = CKR_OPERATION_NOT_INITIALIZED;
*pulLastPartLen = 0;
goto clean2;
}
switch (mechanism) {
case CKM_DES_CBC_PAD:
case CKM_DES3_CBC_PAD:
{
soft_des_ctx_t *soft_des_ctx;
soft_des_ctx = (soft_des_ctx_t *)session_p->decrypt.context;
/*
* We should have only one block of data left in the
* remaining buffer.
*/
if (soft_des_ctx->remain_len != DES_BLOCK_LEN) {
*pulLastPartLen = 0;
rv = CKR_ENCRYPTED_DATA_LEN_RANGE;
/* Cleanup memory space. */
free(soft_des_ctx->des_cbc);
bzero(soft_des_ctx->key_sched,
soft_des_ctx->keysched_len);
free(soft_des_ctx->key_sched);
goto clean1;
}
out_len = DES_BLOCK_LEN;
/*
* If application asks for the length of the output buffer
* to hold the plaintext?
*/
if (pLastPart == NULL) {
*pulLastPartLen = out_len;
rv = CKR_OK;
goto clean2;
} else {
crypto_data_t out;
/* Copy remaining data to the output buffer. */
(void) memcpy(pLastPart, soft_des_ctx->data,
DES_BLOCK_LEN);
out.cd_format = CRYPTO_DATA_RAW;
out.cd_offset = 0;
out.cd_length = DES_BLOCK_LEN;
out.cd_raw.iov_base = (char *)pLastPart;
out.cd_raw.iov_len = DES_BLOCK_LEN;
/* Decrypt final block of data. */
rc = des_decrypt_contiguous_blocks(
(des_ctx_t *)soft_des_ctx->des_cbc,
(char *)pLastPart, DES_BLOCK_LEN, &out);
if (rc == 0) {
/*
* Remove padding bytes after decryption of
* ciphertext block to produce the original
* plaintext.
*/
rv = soft_remove_pkcs7_padding(pLastPart,
DES_BLOCK_LEN, &out_len);
if (rv != CKR_OK)
*pulLastPartLen = 0;
else
*pulLastPartLen = out_len;
} else {
*pulLastPartLen = 0;
rv = CKR_FUNCTION_FAILED;
}
/* Cleanup memory space. */
free(soft_des_ctx->des_cbc);
bzero(soft_des_ctx->key_sched,
soft_des_ctx->keysched_len);
free(soft_des_ctx->key_sched);
}
break;
}
case CKM_DES_CBC:
case CKM_DES_ECB:
case CKM_DES3_CBC:
case CKM_DES3_ECB:
{
soft_des_ctx_t *soft_des_ctx;
soft_des_ctx = (soft_des_ctx_t *)session_p->decrypt.context;
/*
* CKM_DES_CBC and CKM_DES_ECB does not do any padding,
* so when the final is called, the remaining buffer
* should not contain any more data.
*/
*pulLastPartLen = 0;
if (soft_des_ctx->remain_len != 0) {
rv = CKR_ENCRYPTED_DATA_LEN_RANGE;
} else {
if (pLastPart == NULL)
goto clean2;
}
/* Cleanup memory space. */
free(soft_des_ctx->des_cbc);
bzero(soft_des_ctx->key_sched, soft_des_ctx->keysched_len);
free(soft_des_ctx->key_sched);
break;
}
case CKM_AES_CBC_PAD:
{
soft_aes_ctx_t *soft_aes_ctx;
soft_aes_ctx = (soft_aes_ctx_t *)session_p->decrypt.context;
/*
* We should have only one block of data left in the
* remaining buffer.
*/
if (soft_aes_ctx->remain_len != AES_BLOCK_LEN) {
*pulLastPartLen = 0;
rv = CKR_ENCRYPTED_DATA_LEN_RANGE;
/* Cleanup memory space. */
free(soft_aes_ctx->aes_cbc);
bzero(soft_aes_ctx->key_sched,
soft_aes_ctx->keysched_len);
free(soft_aes_ctx->key_sched);
goto clean1;
}
out_len = AES_BLOCK_LEN;
/*
* If application asks for the length of the output buffer
* to hold the plaintext?
*/
if (pLastPart == NULL) {
*pulLastPartLen = out_len;
rv = CKR_OK;
goto clean2;
} else {
crypto_data_t out;
/* Copy remaining data to the output buffer. */
(void) memcpy(pLastPart, soft_aes_ctx->data,
AES_BLOCK_LEN);
out.cd_format = CRYPTO_DATA_RAW;
out.cd_offset = 0;
out.cd_length = AES_BLOCK_LEN;
out.cd_raw.iov_base = (char *)pLastPart;
out.cd_raw.iov_len = AES_BLOCK_LEN;
/* Decrypt final block of data. */
rc = aes_decrypt_contiguous_blocks(
(aes_ctx_t *)soft_aes_ctx->aes_cbc,
(char *)pLastPart, AES_BLOCK_LEN, &out);
if (rc == 0) {
/*
* Remove padding bytes after decryption of
* ciphertext block to produce the original
* plaintext.
*/
rv = soft_remove_pkcs7_padding(pLastPart,
AES_BLOCK_LEN, &out_len);
if (rv != CKR_OK)
*pulLastPartLen = 0;
else
*pulLastPartLen = out_len;
} else {
*pulLastPartLen = 0;
rv = CKR_FUNCTION_FAILED;
}
/* Cleanup memory space. */
free(soft_aes_ctx->aes_cbc);
bzero(soft_aes_ctx->key_sched,
soft_aes_ctx->keysched_len);
free(soft_aes_ctx->key_sched);
}
break;
}
case CKM_AES_CBC:
case CKM_AES_ECB:
{
soft_aes_ctx_t *soft_aes_ctx;
soft_aes_ctx = (soft_aes_ctx_t *)session_p->decrypt.context;
/*
* CKM_AES_CBC and CKM_AES_ECB does not do any padding,
* so when the final is called, the remaining buffer
* should not contain any more data.
*/
*pulLastPartLen = 0;
if (soft_aes_ctx->remain_len != 0) {
rv = CKR_ENCRYPTED_DATA_LEN_RANGE;
} else {
if (pLastPart == NULL)
goto clean2;
}
/* Cleanup memory space. */
free(soft_aes_ctx->aes_cbc);
bzero(soft_aes_ctx->key_sched, soft_aes_ctx->keysched_len);
free(soft_aes_ctx->key_sched);
break;
}
case CKM_AES_CTR:
{
crypto_data_t out;
soft_aes_ctx_t *soft_aes_ctx;
ctr_ctx_t *ctr_ctx;
size_t len;
soft_aes_ctx = (soft_aes_ctx_t *)session_p->decrypt.context;
ctr_ctx = soft_aes_ctx->aes_cbc;
len = ctr_ctx->ctr_remainder_len;
if (pLastPart == NULL) {
*pulLastPartLen = len;
goto clean1;
}
if (len > 0) {
out.cd_format = CRYPTO_DATA_RAW;
out.cd_offset = 0;
out.cd_length = len;
out.cd_raw.iov_base = (char *)pLastPart;
out.cd_raw.iov_len = len;
rv = ctr_mode_final(ctr_ctx, &out, aes_encrypt_block);
if (rv == CRYPTO_DATA_LEN_RANGE)
rv = CRYPTO_ENCRYPTED_DATA_LEN_RANGE;
}
if (rv == CRYPTO_BUFFER_TOO_SMALL) {
*pulLastPartLen = len;
goto clean1;
}
/* Cleanup memory space. */
free(ctr_ctx);
bzero(soft_aes_ctx->key_sched, soft_aes_ctx->keysched_len);
free(soft_aes_ctx->key_sched);
break;
}
case CKM_BLOWFISH_CBC:
{
soft_blowfish_ctx_t *soft_blowfish_ctx;
soft_blowfish_ctx =
(soft_blowfish_ctx_t *)session_p->decrypt.context;
*pulLastPartLen = 0;
if (soft_blowfish_ctx->remain_len != 0)
rv = CKR_ENCRYPTED_DATA_LEN_RANGE;
else {
if (pLastPart == NULL)
goto clean2;
}
free(soft_blowfish_ctx->blowfish_cbc);
bzero(soft_blowfish_ctx->key_sched,
soft_blowfish_ctx->keysched_len);
free(soft_blowfish_ctx->key_sched);
break;
}
case CKM_RC4:
{
ARCFour_key *key = (ARCFour_key *)session_p->decrypt.context;
bzero(key, sizeof (*key));
*pulLastPartLen = 0;
break;
}
default:
/* PKCS11: The mechanism only supports single-part operation. */
rv = CKR_MECHANISM_INVALID;
break;
}
clean1:
free(session_p->decrypt.context);
session_p->decrypt.context = NULL;
clean2:
(void) pthread_mutex_unlock(&session_p->session_mutex);
return (rv);
}