/*
 * The Initial Developer of the Original Code is International
 * Business Machines Corporation. Portions created by IBM
 * Corporation are Copyright (C) 2005 International Business
 * Machines Corporation. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the Common Public License as published by
 * IBM Corporation; either version 1 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * Common Public License for more details.
 *
 * You should have received a copy of the Common Public License
 * along with this program; if not, a copy can be viewed at
 * http://www.opensource.org/licenses/cpl1.0.php.
 */

/* (C) COPYRIGHT International Business Machines Corp. 2001, 2002, 2005 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "tpmtok_int.h"

CK_RV
encr_mgr_init(SESSION      * sess,
        ENCR_DECR_CONTEXT * ctx,
        CK_ULONG            operation,
        CK_MECHANISM    * mech,
        CK_OBJECT_HANDLE    key_handle)
{
        OBJECT  * key_obj = NULL;
        CK_ATTRIBUTE  * attr    = NULL;
        CK_BYTE * ptr   = NULL;
        CK_KEY_TYPE     keytype;
        CK_BBOOL        flag;
        CK_RV      rc;


        if (! sess || ! ctx || ! mech) {
                return (CKR_FUNCTION_FAILED);
        }
        if (ctx->active != FALSE) {
                return (CKR_OPERATION_ACTIVE);
        }

        if (operation == OP_ENCRYPT_INIT) {
                rc = object_mgr_find_in_map1(sess->hContext, key_handle,
                    &key_obj);
                if (rc != CKR_OK) {
                        return (CKR_KEY_HANDLE_INVALID);
                }
                rc = template_attribute_find(key_obj->template,
                    CKA_ENCRYPT, &attr);
                if (rc == FALSE) {
                        return (CKR_KEY_FUNCTION_NOT_PERMITTED);
                } else {
                        flag = *(CK_BBOOL *)attr->pValue;
                        if (flag != TRUE) {
                                return (CKR_KEY_FUNCTION_NOT_PERMITTED);
                        }
                }
        } else if (operation == OP_WRAP) {
                rc = object_mgr_find_in_map1(sess->hContext, key_handle,
                    &key_obj);
                if (rc != CKR_OK) {
                        return (CKR_WRAPPING_KEY_HANDLE_INVALID);
                }
                rc = template_attribute_find(key_obj->template,
                    CKA_WRAP, &attr);
                if (rc == FALSE) {
                        return (CKR_KEY_NOT_WRAPPABLE);
                } else {
                        flag = *(CK_BBOOL *)attr->pValue;
                        if (flag == FALSE) {
                                return (CKR_KEY_NOT_WRAPPABLE);
                        }
                }
        } else {
                return (CKR_FUNCTION_FAILED);
        }

        switch (mech->mechanism) {
                case CKM_RSA_PKCS:
                {
                        if (mech->ulParameterLen != 0) {
                                return (CKR_MECHANISM_PARAM_INVALID);
                        }
                        rc = template_attribute_find(key_obj->template,
                            CKA_KEY_TYPE, &attr);
                        if (rc == FALSE) {
                                return (CKR_KEY_TYPE_INCONSISTENT);
                        } else {
                                keytype = *(CK_KEY_TYPE *)attr->pValue;
                                if (keytype != CKK_RSA) {
                                        return (CKR_KEY_TYPE_INCONSISTENT);
                                }
                        }

                        ctx->context_len = 0;
                        ctx->context    = NULL;
                }
                break;
                default:
                        return (CKR_MECHANISM_INVALID);
        }


        if (mech->ulParameterLen > 0) {
                ptr = (CK_BYTE *)malloc(mech->ulParameterLen);
                if (! ptr) {
                        return (CKR_HOST_MEMORY);
                }
                (void) memcpy(ptr, mech->pParameter, mech->ulParameterLen);
        }

        ctx->key                 = key_handle;
        ctx->mech.ulParameterLen = mech->ulParameterLen;
        ctx->mech.mechanism     = mech->mechanism;
        ctx->mech.pParameter    = ptr;
        ctx->multi              = FALSE;
        ctx->active             = TRUE;

        return (CKR_OK);
}

CK_RV
encr_mgr_cleanup(ENCR_DECR_CONTEXT *ctx)
{
        if (! ctx) {
                return (CKR_FUNCTION_FAILED);
        }
        ctx->key                 = 0;
        ctx->mech.ulParameterLen = 0;
        ctx->mech.mechanism     = 0;
        ctx->multi              = FALSE;
        ctx->active             = FALSE;
        ctx->context_len         = 0;

        if (ctx->mech.pParameter) {
                free(ctx->mech.pParameter);
                ctx->mech.pParameter = NULL;
        }

        if (ctx->context) {
                free(ctx->context);
                ctx->context = NULL;
        }

        return (CKR_OK);
}

CK_RV
encr_mgr_encrypt(SESSION           *sess,
        CK_BBOOL           length_only,
        ENCR_DECR_CONTEXT *ctx,
        CK_BYTE    *in_data,
        CK_ULONG           in_data_len,
        CK_BYTE    *out_data,
        CK_ULONG          *out_data_len)
{
        if (! sess || ! ctx) {
                return (CKR_FUNCTION_FAILED);
        }
        if (ctx->active == FALSE) {
                return (CKR_OPERATION_NOT_INITIALIZED);
        }
        if ((length_only == FALSE) && (! in_data || ! out_data)) {
                return (CKR_FUNCTION_FAILED);
        }
        if (ctx->multi == TRUE) {
                return (CKR_OPERATION_ACTIVE);
        }
        switch (ctx->mech.mechanism) {
                case CKM_RSA_PKCS:
                        return (rsa_pkcs_encrypt(sess,  length_only,
                            ctx, in_data,  in_data_len, out_data,
                            out_data_len));

                default:
                        return (CKR_MECHANISM_INVALID);
        }
}