strawmelonjuice.com
Forking what is left of ZeroNet and hopefully adding an AT Proto Frontend/Proxy
1import hashlib
2import os
3import base64
4
5
6def sha512sum(file, blocksize=65536, format="hexdigest"):
7 if type(file) is str: # Filename specified
8 file = open(file, "rb")
9 hash = hashlib.sha512()
10 for block in iter(lambda: file.read(blocksize), b""):
11 hash.update(block)
12
13 # Truncate to 256bits is good enough
14 if format == "hexdigest":
15 return hash.hexdigest()[0:64]
16 else:
17 return hash.digest()[0:32]
18
19
20def sha256sum(file, blocksize=65536):
21 if type(file) is str: # Filename specified
22 file = open(file, "rb")
23 hash = hashlib.sha256()
24 for block in iter(lambda: file.read(blocksize), b""):
25 hash.update(block)
26 return hash.hexdigest()
27
28
29def random(length=64, encoding="hex"):
30 if encoding == "base64": # Characters: A-Za-z0-9
31 hash = hashlib.sha512(os.urandom(256)).digest()
32 return base64.b64encode(hash).decode("ascii").replace("+", "").replace("/", "").replace("=", "")[0:length]
33 else: # Characters: a-f0-9 (faster)
34 return hashlib.sha512(os.urandom(256)).hexdigest()[0:length]
35
36
37# Sha512 truncated to 256bits
38class Sha512t:
39 def __init__(self, data):
40 if data:
41 self.sha512 = hashlib.sha512(data)
42 else:
43 self.sha512 = hashlib.sha512()
44
45 def hexdigest(self):
46 return self.sha512.hexdigest()[0:64]
47
48 def digest(self):
49 return self.sha512.digest()[0:32]
50
51 def update(self, data):
52 return self.sha512.update(data)
53
54
55def sha512t(data=None):
56 return Sha512t(data)