Module BLAKE2b
BLAKE2b cryptographic hash algorithm.
BLAKE2b is an optimized variant of BLAKE, one of the SHA-3 candidates that
made it to the final round of the NIST hash competition.
The algorithm uses 64 bit words, and it therefore works best on
64-bit platforms. The digest size ranges from 8 to 512 bits.
>>> from Cryptodome.Hash import BLAKE2b
>>>
>>> h_obj = BLAKE2b.new(digest_bits=512)
>>> h_obj.update(b'Some data')
>>> print h_obj.hexdigest()
Optionally, BLAKE2b can work as a cryptographic MAC when initialized
with a secret key.
>>> from Cryptodome.Hash import BLAKE2b
>>>
>>> mac = BLAKE2b.new(digest_bits=256, key=b'secret')
>>> mac.update(b'Some data')
>>> print mac.hexdigest()
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new(**kwargs)
Return a new instance of a BLAKE2b hash object. |
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Return a new instance of a BLAKE2b hash object.
- Parameters:
data (byte string) - The very first chunk of the message to hash.
It is equivalent to an early call to BLAKE2b_Hash.update().
digest_bytes (integer) - The size of the digest, in bytes (1 to 64).
digest_bits (integer) - The size of the digest, in bits (8 to 512, in steps of 8).
key (byte string) - The key to use to compute the MAC (1 to 64 bytes).
If not specified, no key will be used.
update_after_digest (boolean) - Optional. By default, a hash object cannot be updated anymore after
the digest is computed. When this flag is True, such check
is no longer enforced.
- Returns:
- A BLAKE2b_Hash object
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