/*
* 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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <pthread.h>
#include <security/cryptoki.h>
#include "softGlobal.h"
#include "softSession.h"
#include "softObject.h"
#include "softOps.h"
CK_RV
C_DecryptInit(CK_SESSION_HANDLE hSession, CK_MECHANISM_PTR pMechanism,
CK_OBJECT_HANDLE hKey)
{
CK_RV rv;
soft_session_t *session_p;
soft_object_t *key_p;
boolean_t lock_held = B_FALSE;
if (!softtoken_initialized)
return (CKR_CRYPTOKI_NOT_INITIALIZED);
/* Obtain the session pointer. */
rv = handle2session(hSession, &session_p);
if (rv != CKR_OK)
return (rv);
if (pMechanism == NULL) {
rv = CKR_ARGUMENTS_BAD;
goto clean_exit;
}
/* Obtain the object pointer. */
HANDLE2OBJECT(hKey, key_p, rv);
if (rv != CKR_OK)
goto clean_exit;
/* Check to see if key object allows for decryption. */
if (!(key_p->bool_attr_mask & DECRYPT_BOOL_ON)) {
rv = CKR_KEY_FUNCTION_NOT_PERMITTED;
goto clean_exit1;
}
(void) pthread_mutex_lock(&session_p->session_mutex);
lock_held = B_TRUE;
/* Check to see if decrypt operation is already active. */
if (session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE) {
/* free the memory to avoid memory leak */
soft_crypt_cleanup(session_p, B_FALSE, lock_held);
}
/*
* This active flag will remain ON until application calls either
* C_Decrypt or C_DecryptFinal to actually obtain the final piece
* of plaintext.
*/
session_p->decrypt.flags = CRYPTO_OPERATION_ACTIVE;
(void) pthread_mutex_unlock(&session_p->session_mutex);
lock_held = B_FALSE;
rv = soft_decrypt_init(session_p, pMechanism, key_p);
if (rv != CKR_OK) {
(void) pthread_mutex_lock(&session_p->session_mutex);
session_p->decrypt.flags &= ~CRYPTO_OPERATION_ACTIVE;
lock_held = B_TRUE;
}
clean_exit1:
OBJ_REFRELE(key_p);
clean_exit:
SES_REFRELE(session_p, lock_held);
return (rv);
}
CK_RV
C_Decrypt(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pEncryptedData,
CK_ULONG ulEncryptedDataLen, CK_BYTE_PTR pData, CK_ULONG_PTR pulDataLen)
{
CK_RV rv;
soft_session_t *session_p;
boolean_t lock_held = B_FALSE;
if (!softtoken_initialized)
return (CKR_CRYPTOKI_NOT_INITIALIZED);
/* Obatin the session pointer. */
rv = handle2session(hSession, &session_p);
if (rv != CKR_OK)
return (rv);
/*
* Only check if input buffer is null. How to handle zero input
* length depents on the mechanism in use. For secret key mechanisms,
* unpadded ones yield zero length output, but padded ones always
* result in smaller than original, possibly zero, length output.
*/
if (pEncryptedData == NULL) {
rv = CKR_ARGUMENTS_BAD;
goto clean_exit;
}
/*
* No need to check pData because application might
* just want to know the length of decrypted data.
*/
if (pulDataLen == NULL) {
rv = CKR_ARGUMENTS_BAD;
goto clean_exit;
}
(void) pthread_mutex_lock(&session_p->session_mutex);
lock_held = B_TRUE;
/* Application must call C_DecryptInit before calling C_Decrypt. */
if (!(session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE)) {
SES_REFRELE(session_p, lock_held);
return (CKR_OPERATION_NOT_INITIALIZED);
}
/*
* C_Decrypt must be called without intervening C_DecryptUpdate
* calls.
*/
if (session_p->decrypt.flags & CRYPTO_OPERATION_UPDATE) {
/*
* C_Decrypt can not be used to terminate a multi-part
* operation, so we'll leave the active decrypt operation
* flag on and let the application continue with the
* decrypt update operation.
*/
SES_REFRELE(session_p, lock_held);
return (CKR_FUNCTION_FAILED);
}
(void) pthread_mutex_unlock(&session_p->session_mutex);
lock_held = B_FALSE;
rv = soft_decrypt(session_p, pEncryptedData, ulEncryptedDataLen,
pData, pulDataLen);
if ((rv == CKR_BUFFER_TOO_SMALL) ||
(pData == NULL && rv == CKR_OK)) {
/*
* We will not terminate the active decrypt operation flag,
* when the application-supplied buffer is too small, or
* the application asks for the length of buffer to hold
* the plaintext.
*/
SES_REFRELE(session_p, lock_held);
return (rv);
}
clean_exit:
/* Clear context, free key, and release session counter */
soft_crypt_cleanup(session_p, B_FALSE, B_FALSE);
return (rv);
}
CK_RV
C_DecryptUpdate(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pEncryptedPart,
CK_ULONG ulEncryptedPartLen, CK_BYTE_PTR pPart,
CK_ULONG_PTR pulPartLen)
{
CK_RV rv;
soft_session_t *session_p;
boolean_t lock_held = B_FALSE;
if (!softtoken_initialized)
return (CKR_CRYPTOKI_NOT_INITIALIZED);
/* Obtain the session pointer. */
rv = handle2session(hSession, &session_p);
if (rv != CKR_OK)
return (rv);
/*
* Only check if input buffer is null. How to handle zero input
* length depents on the mechanism in use. For secret key mechanisms,
* unpadded ones yeild zero length output, but padded ones always
* result in smaller than original, possibly zero, length output.
*/
if (pEncryptedPart == NULL) {
rv = CKR_ARGUMENTS_BAD;
goto clean_exit;
}
/*
* Only check if pulPartLen is NULL.
* No need to check if pPart is NULL because application
* might just ask for the length of buffer to hold the
* recovered data.
*/
if (pulPartLen == NULL) {
rv = CKR_ARGUMENTS_BAD;
goto clean_exit;
}
(void) pthread_mutex_lock(&session_p->session_mutex);
lock_held = B_TRUE;
/*
* Application must call C_DecryptInit before calling
* C_DecryptUpdate.
*/
if (!(session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE)) {
SES_REFRELE(session_p, lock_held);
return (CKR_OPERATION_NOT_INITIALIZED);
}
session_p->decrypt.flags |= CRYPTO_OPERATION_UPDATE;
(void) pthread_mutex_unlock(&session_p->session_mutex);
lock_held = B_FALSE;
rv = soft_decrypt_update(session_p, pEncryptedPart,
ulEncryptedPartLen, pPart, pulPartLen);
/*
* If CKR_OK or CKR_BUFFER_TOO_SMALL, don't terminate the
* current decryption operation.
*/
if ((rv == CKR_OK) || (rv == CKR_BUFFER_TOO_SMALL)) {
SES_REFRELE(session_p, lock_held);
return (rv);
}
clean_exit:
/*
* After an error occurred, terminate the current decrypt
* operation by resetting the active and update flags.
*/
soft_crypt_cleanup(session_p, B_FALSE, lock_held);
return (rv);
}
CK_RV
C_DecryptFinal(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pLastPart,
CK_ULONG_PTR pulLastPartLen)
{
CK_RV rv;
soft_session_t *session_p;
boolean_t lock_held = B_FALSE;
if (!softtoken_initialized)
return (CKR_CRYPTOKI_NOT_INITIALIZED);
/* Obtain the session pointer. */
rv = handle2session(hSession, &session_p);
if (rv != CKR_OK)
return (rv);
if (pulLastPartLen == NULL) {
rv = CKR_ARGUMENTS_BAD;
goto clean_exit;
}
(void) pthread_mutex_lock(&session_p->session_mutex);
lock_held = B_TRUE;
/*
* Application must call C_DecryptInit before calling
* C_DecryptFinal.
*/
if (!(session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE)) {
SES_REFRELE(session_p, lock_held);
return (CKR_OPERATION_NOT_INITIALIZED);
}
(void) pthread_mutex_unlock(&session_p->session_mutex);
lock_held = B_FALSE;
rv = soft_decrypt_final(session_p, pLastPart, pulLastPartLen);
if ((rv == CKR_BUFFER_TOO_SMALL) ||
(pLastPart == NULL && rv == CKR_OK)) {
/*
* We will not terminate the active decrypt operation flag,
* when the application-supplied buffer is too small, or
* the application asks for the length of buffer to hold
* the plaintext.
*/
SES_REFRELE(session_p, lock_held);
return (rv);
}
/* Terminates the active encrypt operation. */
(void) pthread_mutex_lock(&session_p->session_mutex);
session_p->decrypt.flags = 0;
lock_held = B_TRUE;
SES_REFRELE(session_p, lock_held);
return (rv);
clean_exit:
/* Terminates the active decrypt operation */
soft_crypt_cleanup(session_p, B_FALSE, lock_held);
return (rv);
}