96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*!
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\ingroup BLAKE2
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\brief This function initializes a Blake2b structure for use with the
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Blake2 hash function.
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\return 0 Returned upon successfully initializing the Blake2b structure and
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setting the digest size.
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\param b2b pointer to the Blake2b structure to initialize
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\param digestSz length of the blake 2 digest to implement
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_Example_
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\code
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Blake2b b2b;
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// initialize Blake2b structure with 64 byte digest
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wc_InitBlake2b(&b2b, 64);
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\endcode
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\sa wc_Blake2bUpdate
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*/
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WOLFSSL_API int wc_InitBlake2b(Blake2b*, word32);
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/*!
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\ingroup BLAKE2
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\brief This function updates the Blake2b hash with the given input data.
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This function should be called after wc_InitBlake2b, and repeated until
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one is ready for the final hash: wc_Blake2bFinal.
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\return 0 Returned upon successfully update the Blake2b structure with
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the given data
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\return -1 Returned if there is a failure while compressing the input data
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\param b2b pointer to the Blake2b structure to update
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\param data pointer to a buffer containing the data to append
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\param sz length of the input data to append
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_Example_
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\code
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int ret;
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Blake2b b2b;
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// initialize Blake2b structure with 64 byte digest
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wc_InitBlake2b(&b2b, 64);
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byte plain[] = { // initialize input };
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ret = wc_Blake2bUpdate(&b2b, plain, sizeof(plain));
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if( ret != 0) {
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// error updating blake2b
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}
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\endcode
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\sa wc_InitBlake2b
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\sa wc_Blake2bFinal
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*/
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WOLFSSL_API int wc_Blake2bUpdate(Blake2b*, const byte*, word32);
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/*!
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\ingroup BLAKE2
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\brief This function computes the Blake2b hash of the previously supplied
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input data. The output hash will be of length requestSz, or, if
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requestSz==0, the digestSz of the b2b structure. This function should be
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called after wc_InitBlake2b and wc_Blake2bUpdate has been processed for
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each piece of input data desired.
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\return 0 Returned upon successfully computing the Blake2b hash
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\return -1 Returned if there is a failure while parsing the Blake2b hash
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\param b2b pointer to the Blake2b structure to update
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\param final pointer to a buffer in which to store the blake2b hash.
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Should be of length requestSz
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\param requestSz length of the digest to compute. When this is zero,
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b2b->digestSz will be used instead
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_Example_
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\code
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int ret;
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Blake2b b2b;
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byte hash[64];
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// initialize Blake2b structure with 64 byte digest
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wc_InitBlake2b(&b2b, 64);
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... // call wc_Blake2bUpdate to add data to hash
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ret = wc_Blake2bFinal(&b2b, hash, 64);
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if( ret != 0) {
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// error generating blake2b hash
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}
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\endcode
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\sa wc_InitBlake2b
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\sa wc_Blake2bUpdate
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*/
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WOLFSSL_API int wc_Blake2bFinal(Blake2b*, byte*, word32);
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