Warning
This code is not intended to provide true protection against real-world attacks. Instead, it serves as a demonstration of the algorithms.
Implementation of several block ciphers.
All functions that return a value return 0 upon success, nonzero value otherwise.
#define <NAME>_BLOCK_BITS <integer-literal>
The length of the encrypted block in bits.
#define <NAME>_BLOCK_BYTE <integer-literal>
The length of the encrypted block in bytes.
int <name>_init(const void* key, int key_bits)
Initializes the internal state using a key at the key pointer with a length of key_bits bits.
void <name>_block_encode(void* dest, const void* src)
Encrypts the block by the src pointer and stores it by the dest pointer (src and dest can be the same).
void <name>_block_decode(void* dest, const void* src)
Decrypts the block by the src pointer and stores it by the dest pointer (src and dest can be the same).
#define <NAME>_INIT_VEC_BYTE <integer-literal>
The length of the initialization vector in bytes.
#define <NAME>_AUTH_TAG_BYTE <integer-literal>
The length of the authentication tag in bytes.
int <name>_set_reader(size_t (*func)(void* dst, size_t size, size_t count, void* userdata), void* userdata)
Sets the reading callback for plain/cipher text.
int <name>_set_writer(size_t (*func)(const void* src, size_t size, size_t count, void* userdata), void* userdata)
Sets the writing callback for cipher/plain text.
int <name>_set_auth_data(const void* data, size_t size)
Sets the authentication data, it may be empty.
int <name>_set_init_vector(const void* data)
Sets the initialization vector, expect <NAME>_INIT_VEC_BYTE bytes.
int <name>_set_auth_tag(const void* src)
Sets the authentication tag for checking in decryption, expect <NAME>_AUTH_TAG_BYTE bytes.
int <name>_get_auth_tag(void* dst)
Сopies the value of the authentication tag after encryption, expect <NAME>_AUTH_TAG_BYTE bytes.
int <name>_set_encode_func(void (*func)(void* dst, const void* src))
Sets the encryption function with behaviour like a ciphers before.
void <name>_encryption(void)
Encrypts the plaintext from the reader and write the result to writer.
void <name>_decryption(void)
Decrypts the ciphertext from the reader and write the result to writer.