/*
 * 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 "softObject.h"
#include "softOps.h"
#include "softSession.h"


CK_RV
C_SignInit(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 supports signature. */
        if (!(key_p->bool_attr_mask & SIGN_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 sign operation is already active. */
        if (session_p->sign.flags & CRYPTO_OPERATION_ACTIVE) {
                /* free the memory to avoid memory leak */
                soft_sign_verify_cleanup(session_p, B_TRUE, B_TRUE);
        }

        /*
         * This active flag will remain ON until application calls either
         * C_Sign or C_SignFinal to actually obtain the signature.
         */
        session_p->sign.flags = CRYPTO_OPERATION_ACTIVE;

        (void) pthread_mutex_unlock(&session_p->session_mutex);
        lock_held = B_FALSE;

        rv = soft_sign_init(session_p, pMechanism, key_p);

        if (rv != CKR_OK) {
                (void) pthread_mutex_lock(&session_p->session_mutex);
                session_p->sign.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_Sign(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pData, CK_ULONG ulDataLen,
    CK_BYTE_PTR pSignature, CK_ULONG_PTR pulSignatureLen)
{

        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);

        if (pulSignatureLen == NULL ||
            ((*pulSignatureLen != 0) && (pSignature == NULL))) {
                rv = CKR_ARGUMENTS_BAD;
                goto clean_exit;
        }

        (void) pthread_mutex_lock(&session_p->session_mutex);
        lock_held = B_TRUE;

        /* Application must call C_SignInit before calling C_Sign. */
        if (!(session_p->sign.flags & CRYPTO_OPERATION_ACTIVE)) {
                SES_REFRELE(session_p, lock_held);
                return (CKR_OPERATION_NOT_INITIALIZED);
        }

        /*
         * C_Sign must be called without intervening C_SignUpdate
         * calls.
         */
        if (session_p->sign.flags & CRYPTO_OPERATION_UPDATE) {
                /*
                 * C_Sign can not be used to terminate a multi-part
                 * operation, so we'll leave the active sign operation
                 * flag on and let the application continue with the
                 * sign 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_sign(session_p, pData, ulDataLen, pSignature,
            pulSignatureLen);

        if ((rv == CKR_BUFFER_TOO_SMALL) ||
            (pSignature == NULL && rv == CKR_OK)) {
                /*
                 * We will not terminate the active sign operation flag,
                 * when the application-supplied buffer is too small, or
                 * the application asks for the length of buffer to hold
                 * the signature.
                 */
                SES_REFRELE(session_p, lock_held);
                return (rv);
        }

clean_exit:
        /* Clear contexts, free key, and release session counter */
        soft_sign_verify_cleanup(session_p, B_TRUE, B_FALSE);
        return (rv);
}


CK_RV
C_SignUpdate(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pPart,
    CK_ULONG ulPartLen)
{

        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 (ulPartLen == 0) {
                SES_REFRELE(session_p, lock_held);
                return (CKR_OK);
        }

        if (pPart == NULL) {
                rv = CKR_ARGUMENTS_BAD;
                goto clean_exit;
        }

        (void) pthread_mutex_lock(&session_p->session_mutex);
        lock_held = B_TRUE;

        /*
         * Application must call C_SignInit before calling
         * C_SignUpdate.
         */
        if (!(session_p->sign.flags & CRYPTO_OPERATION_ACTIVE)) {
                SES_REFRELE(session_p, lock_held);
                return (CKR_OPERATION_NOT_INITIALIZED);
        }

        session_p->sign.flags |= CRYPTO_OPERATION_UPDATE;

        (void) pthread_mutex_unlock(&session_p->session_mutex);
        lock_held = B_FALSE;

        rv = soft_sign_update(session_p, pPart, ulPartLen);

        if (rv == CKR_OK) {
                SES_REFRELE(session_p, lock_held);
                return (rv);
        }

clean_exit:
        /* After error, clear context, free key, & release session counter */
        soft_sign_verify_cleanup(session_p, B_TRUE, B_FALSE);
        return (rv);

}


CK_RV
C_SignFinal(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pSignature,
    CK_ULONG_PTR pulSignatureLen)
{

        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 (pulSignatureLen == NULL) {
                rv = CKR_ARGUMENTS_BAD;
                goto clean_exit;
        }

        (void) pthread_mutex_lock(&session_p->session_mutex);
        lock_held = B_TRUE;

        /*
         * Application must call C_SignInit before calling
         * C_SignFinal.
         */
        if (!(session_p->sign.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_sign_final(session_p, pSignature, pulSignatureLen);

        if ((rv == CKR_BUFFER_TOO_SMALL) ||
            (pSignature == NULL && rv == CKR_OK)) {
                /*
                 * We will not terminate the active sign operation flag,
                 * when the application-supplied buffer is too small, or
                 * the application asks for the length of buffer to hold
                 * the signature.
                 */
                SES_REFRELE(session_p, lock_held);
                return (rv);
        }

clean_exit:
        /* Clear contexts, free key, and release session counter */
        soft_sign_verify_cleanup(session_p, B_TRUE, B_FALSE);
        return (rv);
}


CK_RV
C_SignRecoverInit(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 supports sign_recover. */
        if (!(key_p->bool_attr_mask & SIGN_RECOVER_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 sign operation is already active. */
        if (session_p->sign.flags & CRYPTO_OPERATION_ACTIVE) {
                /* free the memory to avoid memory leak */
                soft_sign_verify_cleanup(session_p, B_TRUE, B_TRUE);
        }

        /*
         * This active flag will remain ON until application calls either
         * C_SignRecover to actually obtain the signature.
         */
        session_p->sign.flags = CRYPTO_OPERATION_ACTIVE;

        (void) pthread_mutex_unlock(&session_p->session_mutex);
        lock_held = B_FALSE;

        rv = soft_sign_recover_init(session_p, pMechanism, key_p);

        if (rv != CKR_OK) {
                (void) pthread_mutex_lock(&session_p->session_mutex);
                session_p->sign.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_SignRecover(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pData,
    CK_ULONG ulDataLen, CK_BYTE_PTR pSignature, CK_ULONG_PTR pulSignatureLen)
{

        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);

        if ((pData == NULL) || (pulSignatureLen == NULL)) {
                rv = CKR_ARGUMENTS_BAD;
                goto clean_exit;
        }

        (void) pthread_mutex_lock(&session_p->session_mutex);
        lock_held = B_TRUE;

        /* Application must call C_SignRecoverInit before C_SignRecover. */
        if (!(session_p->sign.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_sign_recover(session_p, pData, ulDataLen, pSignature,
            pulSignatureLen);

        if ((rv == CKR_BUFFER_TOO_SMALL) ||
            (pSignature == NULL && rv == CKR_OK)) {
                /*
                 * We will not terminate the active sign operation flag,
                 * when the application-supplied buffer is too small, or
                 * the application asks for the length of buffer to hold
                 * the signature.
                 */
                SES_REFRELE(session_p, lock_held);
                return (rv);
        }

clean_exit:
        /* Clear contexts, free key, and release session counter */
        soft_sign_verify_cleanup(session_p, B_TRUE, B_FALSE);
        return (rv);
}