57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
import hashlib
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import os
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import base64
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def sha512sum(file, blocksize=65536, format="hexdigest"):
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if type(file) is str: # Filename specified
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file = open(file, "rb")
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hash = hashlib.sha512()
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for block in iter(lambda: file.read(blocksize), b""):
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hash.update(block)
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# Truncate to 256bits is good enough
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if format == "hexdigest":
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return hash.hexdigest()[0:64]
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else:
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return hash.digest()[0:32]
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def sha256sum(file, blocksize=65536):
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if type(file) is str: # Filename specified
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file = open(file, "rb")
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hash = hashlib.sha256()
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for block in iter(lambda: file.read(blocksize), b""):
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hash.update(block)
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return hash.hexdigest()
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def random(length=64, encoding="hex"):
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if encoding == "base64": # Characters: A-Za-z0-9
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hash = hashlib.sha512(os.urandom(256)).digest()
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return base64.b64encode(hash).decode("ascii").replace("+", "").replace("/", "").replace("=", "")[0:length]
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else: # Characters: a-f0-9 (faster)
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return hashlib.sha512(os.urandom(256)).hexdigest()[0:length]
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# Sha512 truncated to 256bits
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class Sha512t:
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def __init__(self, data):
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if data:
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self.sha512 = hashlib.sha512(data)
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else:
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self.sha512 = hashlib.sha512()
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def hexdigest(self):
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return self.sha512.hexdigest()[0:64]
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def digest(self):
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return self.sha512.digest()[0:32]
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def update(self, data):
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return self.sha512.update(data)
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def sha512t(data=None):
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return Sha512t(data)
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