FFmpeg 5.1.6
Data Structures | Functions

Data Structures

struct  AVDES
 

Functions

AVDESav_des_alloc (void)
 Allocate an AVDES context. More...
 
int av_des_init (struct AVDES *d, const uint8_t *key, int key_bits, int decrypt)
 Initializes an AVDES context. More...
 
void av_des_crypt (struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
 Encrypts / decrypts using the DES algorithm. More...
 
void av_des_mac (struct AVDES *d, uint8_t *dst, const uint8_t *src, int count)
 Calculates CBC-MAC using the DES algorithm. More...
 

Detailed Description

Function Documentation

◆ av_des_alloc()

AVDES * av_des_alloc ( void  )

Allocate an AVDES context.

◆ av_des_init()

int av_des_init ( struct AVDES d,
const uint8_t *  key,
int  key_bits,
int  decrypt 
)

Initializes an AVDES context.

Parameters
key_bitsmust be 64 or 192
decrypt0 for encryption/CBC-MAC, 1 for decryption
Returns
zero on success, negative value otherwise

◆ av_des_crypt()

void av_des_crypt ( struct AVDES d,
uint8_t *  dst,
const uint8_t *  src,
int  count,
uint8_t *  iv,
int  decrypt 
)

Encrypts / decrypts using the DES algorithm.

Parameters
countnumber of 8 byte blocks
dstdestination array, can be equal to src, must be 8-byte aligned
srcsource array, can be equal to dst, must be 8-byte aligned, may be NULL
ivinitialization vector for CBC mode, if NULL then ECB will be used, must be 8-byte aligned
decrypt0 for encryption, 1 for decryption

◆ av_des_mac()

void av_des_mac ( struct AVDES d,
uint8_t *  dst,
const uint8_t *  src,
int  count 
)

Calculates CBC-MAC using the DES algorithm.

Parameters
countnumber of 8 byte blocks
dstdestination array, can be equal to src, must be 8-byte aligned
srcsource array, can be equal to dst, must be 8-byte aligned, may be NULL