FFmpeg
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

AVDES* av_des_alloc ( void  )

Allocate an AVDES context.

Definition at line 273 of file des.c.

Referenced by decrypt_init(), ff_asfcrypt_dec(), nprobe(), rprobe(), and run_lavu_des().

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
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

Definition at line 322 of file des.c.

Referenced by decrypt_init(), ff_asfcrypt_dec(), main(), nprobe(), read_packet(), rprobe(), run_lavu_des(), and run_test().

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

Definition at line 328 of file des.c.

Referenced by rprobe().