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rc4: add av_rc4_alloc()

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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 16:57:47 -03:00 committed by Anton Khirnov
parent 7a7df34c91
commit ae365453c3
3 changed files with 35 additions and 3 deletions
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1
doc/APIchanges
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@ -15,6 +15,7 @@ API changes, most recent first:
2015-xx-xx - lavu 54.17.0
xxxxxxx - Add av_blowfish_alloc().
xxxxxxx - Add av_rc4_alloc().
2015-07-29 - 7e38340 - lavu 54.16.0 - hmac.h
Add AV_HMAC_SHA224 and AV_HMAC_SHA256.

13
libavutil/rc4.c
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@ -22,9 +22,20 @@
*/
#include "avutil.h"
#include "common.h"
#include "mem.h"
#include "rc4.h"
typedef struct AVRC4 AVRC4;
#if !FF_API_CRYPTO_CONTEXT
struct AVRC4 {
uint8_t state[256];
int x, y;
};
#endif
AVRC4 *av_rc4_alloc(void)
{
return av_mallocz(sizeof(struct AVRC4));
}
int av_rc4_init(AVRC4 *r, const uint8_t *key, int key_bits, int decrypt) {
int i, j;

24
libavutil/rc4.h
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@ -22,11 +22,27 @@
#define AVUTIL_RC4_H
#include <stdint.h>
#include "version.h"
struct AVRC4 {
/**
* @defgroup lavu_rc4 RC4
* @ingroup lavu_crypto
* @{
*/
#if FF_API_CRYPTO_CONTEXT
typedef struct AVRC4 {
uint8_t state[256];
int x, y;
};
} AVRC4;
#else
typedef struct AVRC4 AVRC4;
#endif
/**
* Allocate an AVRC4 context.
*/
AVRC4 *av_rc4_alloc(void);
/**
* @brief Initializes an AVRC4 context.
@ -47,4 +63,8 @@ int av_rc4_init(struct AVRC4 *d, const uint8_t *key, int key_bits, int decrypt);
*/
void av_rc4_crypt(struct AVRC4 *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
/**
* @}
*/
#endif /* AVUTIL_RC4_H */