DES
Header file
#include "mln_des.h"
Module
des
Functions
mln_des_init
void mln_des_init(mln_des_t *d, mln_u64_t key);
Description: Initialize the mln_des_t structure. key is an 8-byte key.
Return value: none
mln_des_new
mln_des_t *mln_des_new(mln_u64_t key);
Description: Create and initialize the mln_des_t structure allocated by malloc. key is an 8-byte key.
Return value: return mln_des_t pointer if successful, otherwise return NULL
mln_des_pool_new
mln_des_t *mln_des_pool_new(mln_alloc_t *pool, mln_u64_t key);
Description: Create and initialize the mln_des_t structure allocated from the memory pool pointed to by pool. key is an 8-byte key.
Return value: return mln_des_t pointer if successful, otherwise return NULL
mln_des_free
void mln_des_free(mln_des_t *d);
Description: Free the memory of the mln_des_t structure, which should have been allocated by mln_des_new.
Return value: none
mln_des_pool_free
void mln_des_pool_free(mln_des_t *d);
Description: Free the memory of the mln_des_t structure, which should have been allocated by mln_des_pool_new.
Return value: none
mln_des
mln_u64_t mln_des(mln_des_t *d, mln_u64_t msg, mln_u32_t is_encrypt);
Description: Encrypt or decrypt msg, msg is an 8-byte data. is_encrypt is used to tell the function whether to perform an encryption operation (non-0) or a decryption operation (0).
Return value: 8 bytes ciphertext/plaintext
mln_des_buf
void mln_des_buf(mln_des_t *d, mln_u8ptr_t in, mln_uauto_t inlen, mln_u8ptr_t out, mln_uauto_t outlen, mln_u8_t fill, mln_u32_t is_encrypt);
Description: It is used to encrypt and decrypt the plaintext indicated by in and inlen, and output the result to the memory area (allocated by the caller) indicated by out and outlen. Note: The input data specified by in and inlen must be an integer multiple of 8 bytes. If the input data length is less than 8 bytes, padding bytes are required. The filled byte content is fill. is_encrypt is used to tell the function whether to perform an encryption operation (non-0) or a decryption operation (0).
Note: The input data specified by in and inlen must be an integer multiple of 8 bytes.
Return value: none
mln_3des_init
void mln_3des_init(mln_3des_t *tdes, mln_u64_t key1, mln_u64_t key2);
Description: Initialize the mln_3des_t structure. Both key1 and key2 are 8-byte keys.
Return value: none
mln_3des_new
mln_3des_t *mln_3des_new(mln_u64_t key1, mln_u64_t key2);
Description: Create and initialize the mln_3des_t structure allocated by malloc. Both key1 and key2 are 8-byte keys.
Return value: return mln_3des_t pointer if successful, otherwise return NULL
mln_3des_pool_new
mln_3des_t *mln_3des_pool_new(mln_alloc_t *pool, mln_u64_t key1, mln_u64_t key2);
Description: Create and initialize the mln_3des_t structure allocated from the memory pool specified by pool. Both key1 and key2 are 8-byte keys.
Return value: return mln_3des_t pointer if successful, otherwise return NULL
mln_3des_free
void mln_3des_free(mln_3des_t *tdes);
Description: Free the memory of the mln_3des_t structure, which should have been allocated by mln_des_new.
Return value: none
mln_3des_pool_free
void mln_3des_pool_free(mln_3des_t *tdes);
Description: Free the memory of the mln_des_t structure, which should have been allocated by mln_des_pool_new.
Return value: none
mln_3des
mln_u64_t mln_3des(mln_3des_t *tdes, mln_u64_t msg, mln_u32_t is_encrypt);
Description: Encrypt or decrypt msg, msg is an 8-byte data. is_encrypt is used to tell the function whether to perform an encryption operation (non-0) or a decryption operation (0).
Return value: 8 bytes ciphertext/plaintext
mln_3des_buf
void mln_3des_buf(mln_3des_t *tdes, mln_u8ptr_t in, mln_uauto_t inlen, mln_u8ptr_t out, mln_uauto_t outlen, mln_u8_t fill, mln_u32_t is_encrypt);
Description: It is used to encrypt and decrypt the plaintext indicated by in and inlen, and output the result to the memory area (allocated by the caller) indicated by out and outlen. Note: The input data specified by in and inlen must be an integer multiple of 8 bytes. If the input data length is less than 8 bytes, padding bytes are required. The filled byte content is fill. is_encrypt is used to tell the function whether to perform an encryption operation (non-0) or a decryption operation (0).
Return value: none
Example
#include <stdio.h>
#include "mln_des.h"
int main(int argc, char *argv[])
{
mln_3des_t d;
mln_u8_t text[9] = {0};
mln_u8_t cipher[9] = {0};
mln_3des_init(&d, 0xffff, 0xff120000);
mln_3des_buf(&d, (mln_u8ptr_t)"Hi Tom!!", 11, cipher, sizeof(cipher), 0, 1);
mln_3des_buf(&d, cipher, sizeof(cipher)-1, text, sizeof(text), 0, 0);
printf("%s\n", text);
return 0;
}