48 lines
1.1 KiB
Python
48 lines
1.1 KiB
Python
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import hashlib
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import hmac
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from binascii import hexlify, unhexlify
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def sha256(x):
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""" Simple wrapper of hashlib sha256. """
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return hashlib.sha256(x).digest()
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def sha512(x):
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""" Simple wrapper of hashlib sha512. """
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return hashlib.sha512(x).digest()
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def ripemd160(x):
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""" Simple wrapper of hashlib ripemd160. """
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h = hashlib.new('ripemd160')
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h.update(x)
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return h.digest()
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def double_sha256(x):
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""" SHA-256 of SHA-256, as used extensively in bitcoin. """
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return sha256(sha256(x))
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def hmac_sha512(key, msg):
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""" Use SHA-512 to provide an HMAC. """
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return hmac.new(key, msg, hashlib.sha512).digest()
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def hash160(x):
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""" RIPEMD-160 of SHA-256.
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Used to make bitcoin addresses from pubkeys. """
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return ripemd160(sha256(x))
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def hash_to_hex_str(x):
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""" Convert a big-endian binary hash to displayed hex string.
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Display form of a binary hash is reversed and converted to hex. """
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return hexlify(reversed(x))
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def hex_str_to_hash(x):
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""" Convert a displayed hex string to a binary hash. """
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return reversed(unhexlify(x))
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