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