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Document SHA-1 functions and structures

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Originally committed as revision 19385 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2009-07-09 07:07:01 +00:00
parent 71ed6c8f06
commit 4364fc9a0d
2 changed files with 24 additions and 3 deletions
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7
libavutil/sha1.c
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@ -23,10 +23,11 @@
#include "bswap.h"
#include "sha1.h"
/** hash context */
typedef struct AVSHA1 {
uint64_t count;
uint8_t buffer[64];
uint32_t state[5];
uint64_t count; ///< number of bytes in buffer
uint8_t buffer[64]; ///< 512-bit buffer of input values used in hash updating
uint32_t state[5]; ///< current hash value
} AVSHA1;
const int av_sha1_size = sizeof(AVSHA1);

20
libavutil/sha1.h
View File

@ -27,8 +27,28 @@ extern const int av_sha1_size;
struct AVSHA1;
/**
* Initializes SHA-1 hashing.
*
* @param context pointer to the function context (of size av_sha_size)
*/
void av_sha1_init(struct AVSHA1* context);
/**
* Updates hash value.
*
* @param context hash function context
* @param data input data to update hash with
* @param len input data length
*/
void av_sha1_update(struct AVSHA1* context, const uint8_t* data, unsigned int len);
/**
* Finishes hashing and output digest value.
*
* @param context hash function context
* @param digest buffer where output digest value is stored
*/
void av_sha1_final(struct AVSHA1* context, uint8_t digest[20]);
#endif /* AVUTIL_SHA1_H */