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Document SHA-1 functions and structures
Originally committed as revision 19385 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -23,10 +23,11 @@
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#include "bswap.h"
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#include "sha1.h"
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/** hash context */
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typedef struct AVSHA1 {
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uint64_t count;
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uint8_t buffer[64];
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uint32_t state[5];
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uint64_t count; ///< number of bytes in buffer
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uint8_t buffer[64]; ///< 512-bit buffer of input values used in hash updating
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uint32_t state[5]; ///< current hash value
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} AVSHA1;
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const int av_sha1_size = sizeof(AVSHA1);
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@ -27,8 +27,28 @@ extern const int av_sha1_size;
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struct AVSHA1;
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/**
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* Initializes SHA-1 hashing.
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*
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* @param context pointer to the function context (of size av_sha_size)
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*/
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void av_sha1_init(struct AVSHA1* context);
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/**
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* Updates hash value.
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*
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* @param context hash function context
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* @param data input data to update hash with
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* @param len input data length
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*/
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void av_sha1_update(struct AVSHA1* context, const uint8_t* data, unsigned int len);
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/**
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* Finishes hashing and output digest value.
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*
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* @param context hash function context
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* @param digest buffer where output digest value is stored
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*/
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void av_sha1_final(struct AVSHA1* context, uint8_t digest[20]);
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#endif /* AVUTIL_SHA1_H */
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