4. CMOX_CFB

4.1. CFB single-call algorithms

group CMOX_CFB_ALGO

Variables

const cmox_cipher_algo_t CMOX_AESSMALL_CFB_ENC_ALGO

Identifier of the CFB encryption using AES (small implementation) for single-call function (Defined internally).

const cmox_cipher_algo_t CMOX_AESSMALL_CFB_DEC_ALGO

Identifier of the CFB decryption using AES (small implementation) for single-call function (Defined internally).

const cmox_cipher_algo_t CMOX_AESFAST_CFB_ENC_ALGO

Identifier of the CFB encryption using AES (fast implementation) for single-call function (Defined internally).

const cmox_cipher_algo_t CMOX_AESFAST_CFB_DEC_ALG

Identifier of the CFB decryption using AES (fast implementation) for single-call function (Defined internally).

const cmox_cipher_algo_t CMOX_SM4_CFB_ENC_ALGO

Identifier of the CFB encryption using SM4 for single-call function (Defined internally).

const cmox_cipher_algo_t CMOX_SM4_CFB_DEC_ALGO

Identifier of the CFB decryption using SM4 for single-call function (Defined internally).

4.2. CFB implementations

group CMOX_CFB_IMPL

Variables

const cmox_cfb_impl_t CMOX_AESFAST_CFB_ENC

Implementation of CFB encryption using AES (fast implementation) (Defined internally).

const cmox_cfb_impl_t CMOX_AESFAST_CFB_DEC

Implementation of CFB decryption using AES (fast implementation) (Defined internally).

const cmox_cfb_impl_t CMOX_AESSMALL_CFB_ENC

Implementation of CFB encryption using AES (small implementation) (Defined internally).

const cmox_cfb_impl_t CMOX_AESSMALL_CFB_DEC

Implementation of CFB decryption using AES (small implementation) (Defined internally).

const cmox_cfb_impl_t CMOX_SM4_CFB_ENC

Implementation of CFB encryption using SM4 (Defined internally).

const cmox_cfb_impl_t CMOX_SM4_CFB_DEC

Implementation of CFB decryption using SM4 (Defined internally).

4.3. CFB public method prototypes

group CMOX_CFB_PUBLIC_METHODS

Functions

cmox_cipher_handle_t * cmox_cfb_construct ( cmox_cfb_handle_t * P_pThis , cmox_cfb_impl_t P_impl )

CFB constructor.

The function is used for specifying which block cipher algorithm to use in order to implement the CFB algorithm and if the algorithm will be used for encryption or decryption.

Parameters :

• P_pThis – Pointer to the CFB handle to initialize

• P_impl – Constant that specifies the implementation to use. This parameter can be one of the following values:

  • CMOX_AESFAST_CFB_ENC

  • CMOX_AESFAST_CFB_DEC

  • CMOX_AESSMALL_CFB_ENC

  • CMOX_AESSMALL_CFB_DEC

  • CMOX_SM4_CFB_ENC

  • CMOX_SM4_CFB_DEC

Returns :

cmox_cipher_handle_t* Pointer to a general cipher handle. This will be used by the general purpose cipher functions in order to perform the algorithm

4.4. CFB public types

group CMOX_CFB_PUBLIC_TYPES

Typedefs

typedef const struct cmox_cfb_implStruct_st * cmox_cfb_impl_t

CFB mode implementation.

This type specifies the used block cipher for the CFB construct and if the algorithm will be used for encryption or decryption. This type is defined as a pointer to a structure, that contains the functions needed for the specific implementation, defined in the library internally

struct cmox_cfb_handle_t

#include <cmox_cfb.h>

CFB handle structure definition.

Public Members

cmox_cipher_handle_t super

General cipher handle

cmox_blockcipher_handle_t blockCipher

Block cipher handle

uint32_t iv [ CMOX_CIPHER_BLOCK_SIZE ]

Buffer containing the Initialization Vector

size_t cfb_blockLen

Size of the CFB block. Currently only 16 bytes block supported