nist_kw.h

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/*
 *  Copyright (C) 2018, Arm Limited (or its affiliates), All Rights Reserved
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  This file is part of Mbed TLS (https://tls.mbed.org)
 */

#ifndef MBEDTLS_NIST_KW_H
#define MBEDTLS_NIST_KW_H

#include "cipher.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef enum
{
    MBEDTLS_KW_MODE_KW = 0,
    MBEDTLS_KW_MODE_KWP = 1
} mbedtls_nist_kw_mode_t;

#if !defined(MBEDTLS_NIST_KW_ALT)
// Regular implementation
//

typedef struct {
    mbedtls_cipher_context_t cipher_ctx;    
} mbedtls_nist_kw_context;

#else  /* MBEDTLS_NIST_key wrapping_ALT */
#include "nist_kw_alt.h"
#endif /* MBEDTLS_NIST_KW_ALT */

void mbedtls_nist_kw_init( mbedtls_nist_kw_context *ctx );

int mbedtls_nist_kw_setkey( mbedtls_nist_kw_context *ctx,
                            mbedtls_cipher_id_t cipher,
                            const unsigned char *key,
                            unsigned int keybits,
                            const int is_wrap );

void mbedtls_nist_kw_free( mbedtls_nist_kw_context *ctx );

int mbedtls_nist_kw_wrap( mbedtls_nist_kw_context *ctx, mbedtls_nist_kw_mode_t mode,
                          const unsigned char *input, size_t in_len,
                          unsigned char *output, size_t* out_len, size_t out_size );

int mbedtls_nist_kw_unwrap( mbedtls_nist_kw_context *ctx, mbedtls_nist_kw_mode_t mode,
                            const unsigned char *input, size_t in_len,
                            unsigned char *output, size_t* out_len, size_t out_size);


#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)

int mbedtls_nist_kw_self_test( int verbose );
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */

#ifdef __cplusplus
}
#endif

#endif /* MBEDTLS_NIST_KW_H */