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des: add av_des_alloc() 

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
James Almer 2015-07-28 16:57:49 -03:00 committed by Anton Khirnov
parent 5d8bea3bb2
commit d9e8b47e31
3 changed files with 34 additions and 3 deletions
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1
doc/APIchanges
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@ -17,6 +17,7 @@ API changes, most recent first:
xxxxxxx - Add av_blowfish_alloc().
xxxxxxx - Add av_rc4_alloc().
xxxxxxx - Add av_xtea_alloc().
xxxxxxx - Add av_des_alloc().
2015-07-29 - 7e38340 - lavu 54.16.0 - hmac.h
Add AV_HMAC_SHA224 and AV_HMAC_SHA256.

13
libavutil/des.c
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@ -22,9 +22,15 @@
#include "avutil.h"
#include "common.h"
#include "intreadwrite.h"
#include "mem.h"
#include "des.h"
typedef struct AVDES AVDES;
#if !FF_API_CRYPTO_CONTEXT
struct AVDES {
uint64_t round_keys[3][16];
int triple_des;
};
#endif
#define T(a, b, c, d, e, f, g, h) 64-a,64-b,64-c,64-d,64-e,64-f,64-g,64-h
static const uint8_t IP_shuffle[] = {
@ -286,6 +292,11 @@ static uint64_t des_encdec(uint64_t in, uint64_t K[16], int decrypt) {
return in;
}
AVDES *av_des_alloc(void)
{
return av_mallocz(sizeof(struct AVDES));
}
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt) {
if (key_bits != 64 && key_bits != 192)
return -1;

23
libavutil/des.h
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@ -24,10 +24,25 @@
#include <stdint.h>
struct AVDES {
/**
* @defgroup lavu_des DES
* @ingroup lavu_crypto
* @{
*/
#if FF_API_CRYPTO_CONTEXT
typedef struct AVDES {
uint64_t round_keys[3][16];
int triple_des;
};
} AVDES;
#else
typedef struct AVDES AVDES;
#endif
/**
* Allocate an AVDES context.
*/
AVDES *av_des_alloc(void);
/**
* @brief Initializes an AVDES context.
@ -58,4 +73,8 @@ void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count,
*/
void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count);
/**
* @}
*/
#endif /* AVUTIL_DES_H */