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67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
import os, hashlib, struct, subprocess, fnmatch, shutil, urllib, array
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import wx
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import png
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from Crypto.Cipher import AES
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from Struct import Struct
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def align(x, boundary):
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if(x % boundary == 0):
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return x
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else:
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return (x + boundary) - (x % boundary)
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def hexdump(s, sep=" "):
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return sep.join(map(lambda x: "%02x" % ord(x), s))
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class Crypto:
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"""This is a Cryptographic/hash class used to abstract away things (to make changes easier)"""
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def __init__(self):
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self.align = 64
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return
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def DecryptData(self, key, iv, data, align = True):
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"""Decrypts some data (aligns to 64 bytes, if needed)."""
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if((len(data) % self.align) != 0 and align):
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return AES.new(key, AES.MODE_CBC, iv).decrypt(data + ("\x00" * (self.align - (len(data) % self.align))))
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else:
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return AES.new(key, AES.MODE_CBC, iv).decrypt(data)
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def EncryptData(self, key, iv, data, align = True):
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"""Encrypts some data (aligns to 64 bytes, if needed)."""
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if((len(data) % self.align) != 0 and align):
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return AES.new(key, AES.MODE_CBC, iv).encrypt(data + ("\x00" * (self.align - (len(data) % self.align))))
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else:
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return AES.new(key, AES.MODE_CBC, iv).encrypt(data)
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def DecryptContent(self, titlekey, idx, data):
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"""Decrypts a Content."""
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iv = struct.pack(">H", idx) + "\x00" * 14
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return self.DecryptData(titlekey, iv, data)
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def DecryptTitleKey(self, commonkey, tid, enckey):
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"""Decrypts a Content."""
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iv = struct.pack(">Q", tid) + "\x00" * 8
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return self.DecryptData(commonkey, iv, enckey, False)
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def EncryptContent(self, titlekey, idx, data):
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"""Encrypts a Content."""
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iv = struct.pack(">H", idx) + "\x00" * 14
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return self.EncryptData(titlekey, iv, data)
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def CreateSHAHash(self, data): #tested WORKING (without padding)
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return hashlib.sha1(data).digest()
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def CreateSHAHashHex(self, data):
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return hashlib.sha1(data).hexdigest()
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def CreateMD5HashHex(self, data):
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return hashlib.md5(data).hexdigest()
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def CreateMD5Hash(self, data):
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return hashlib.md5(data).digest()
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def ValidateSHAHash(self, data, hash):
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"""Validates a hash. Not checking currently because we have some...issues with hashes."""
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return 1 #hack
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if((len(data) % self.align) != 0):
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datax = data + ("\x00" * (self.align - (len(data) % align)))
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else:
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datax = data
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# if(hashlib.sha1(datax).hexdigest() == hexdump(hash, "")):
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# return 1
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# else:
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# return 0
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