crypto_libraries/src/nx_crypto_null_cipher.c


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2025-present Eclipse ThreadX Contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** NetX Crypto Component                                                 */
/**                                                                       */
/**   NULL Cipher                                                         */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#include "nx_crypto_null.h"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _nx_crypto_method_null_init                          PORTABLE C     */
/*                                                           6.4.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Timothy Stapko, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*     This function acts as a placeholder for TLS ciphersuites that do   */
/*     not use a ciper for a particular operation. For example, the PSK   */
/*     ciphersuite TLS_PSK_WITH_AES_128_CBC_SHA uses AES and SHA-1 but    */
/*     no public cipher (e.g. RSA).                                       */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    method                                Crypto Method Object          */
/*    key                                   Key                           */
/*    key_size_in_bits                      Size of the key, in bits      */
/*    handle                                Handle, specified by user     */
/*    crypto_metadata                       Metadata area                 */
/*    crypto_metadata_size                  Size of the metadata area     */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/**************************************************************************/
NX_CRYPTO_KEEP UINT  _nx_crypto_method_null_init(struct NX_CRYPTO_METHOD_STRUCT *method,
                                                 UCHAR *key, NX_CRYPTO_KEY_SIZE key_size_in_bits,
                                                 VOID **handle,
                                                 VOID *crypto_metadata,
                                                 ULONG crypto_metadata_size)
{
    NX_CRYPTO_PARAMETER_NOT_USED(method);
    NX_CRYPTO_PARAMETER_NOT_USED(key);
    NX_CRYPTO_PARAMETER_NOT_USED(key_size_in_bits);
    NX_CRYPTO_PARAMETER_NOT_USED(handle);
    NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata);
    NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata_size);

    return(NX_CRYPTO_SUCCESS);
}


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _nx_crypto_method_null_cleanup                      PORTABLE C      */
/*                                                           6.4.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Timothy Stapko, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function cleans up the crypto metadata.                        */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    crypto_metadata                       Crypto metadata               */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/**************************************************************************/
NX_CRYPTO_KEEP UINT  _nx_crypto_method_null_cleanup(VOID *crypto_metadata)
{
    NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata);

    return(NX_CRYPTO_SUCCESS);
}


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _nx_crypto_method_aes_operation                    PORTABLE C       */
/*                                                           6.4.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Timothy Stapko, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function encrypts and decrypts a message using                 */
/*    the AES algorithm.                                                  */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    op                                    AES operation                 */
/*    handle                                Crypto handle                 */
/*    method                                Cryption Method Object        */
/*    key                                   Encryption Key                */
/*    key_size_in_bits                      Key size in bits              */
/*    input                                 Input data                    */
/*    input_length_in_byte                  Input data size               */
/*    iv_ptr                                Initial vector                */
/*    output                                Output buffer                 */
/*    output_length_in_byte                 Output buffer size            */
/*    crypto_metadata                       Metadata area                 */
/*    crypto_metadata_size                  Metadata area size            */
/*    packet_ptr                            Pointer to packet             */
/*    nx_crypto_hw_process_callback         Callback function pointer     */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/**************************************************************************/
NX_CRYPTO_KEEP UINT  _nx_crypto_method_null_operation(UINT op,      /* Encrypt, Decrypt, Authenticate */
                                                      VOID *handle, /* Crypto handler */
                                                      struct NX_CRYPTO_METHOD_STRUCT *method,
                                                      UCHAR *key,
                                                      NX_CRYPTO_KEY_SIZE key_size_in_bits,
                                                      UCHAR *input,
                                                      ULONG input_length_in_byte,
                                                      UCHAR *iv_ptr,
                                                      UCHAR *output,
                                                      ULONG output_length_in_byte,
                                                      VOID *crypto_metadata,
                                                      ULONG crypto_metadata_size,
                                                      VOID *packet_ptr,
                                                      VOID (*nx_crypto_hw_process_callback)(VOID *packet_ptr, UINT status))
{
    NX_CRYPTO_PARAMETER_NOT_USED(op);
    NX_CRYPTO_PARAMETER_NOT_USED(handle);
    NX_CRYPTO_PARAMETER_NOT_USED(method);
    NX_CRYPTO_PARAMETER_NOT_USED(key);
    NX_CRYPTO_PARAMETER_NOT_USED(key_size_in_bits);
    NX_CRYPTO_PARAMETER_NOT_USED(input);
    NX_CRYPTO_PARAMETER_NOT_USED(input_length_in_byte);
    NX_CRYPTO_PARAMETER_NOT_USED(iv_ptr);
    NX_CRYPTO_PARAMETER_NOT_USED(output);
    NX_CRYPTO_PARAMETER_NOT_USED(output_length_in_byte);
    NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata);
    NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata_size);
    NX_CRYPTO_PARAMETER_NOT_USED(packet_ptr);
    NX_CRYPTO_PARAMETER_NOT_USED(nx_crypto_hw_process_callback);

    return(NX_CRYPTO_SUCCESS);
}