def calc_keys(self):
"""Calculate sessions keys for encryption and hmac. Is based on pprime, b1b2, b3b4"""
tw = MCRYPT('twofish', 'ecb')
tw.init(self.pprime)
self.enckey = tw.decrypt(self.b1b2)
# its ok to reuse; ecb doesn't keep state info
self.hshkey = tw.decrypt(self.b3b4)
log.debug("Encryption key K: %s " % repr(self.enckey))
log.debug("HMAC Key L: %s " % repr(self.hshkey))
def calc_keys(self):
"""Calculate sessions keys for encryption and hmac. Is based on pprime, b1b2, b3b4"""
tw = MCRYPT('twofish', 'ecb')
tw.init(self.pprime)
self.enckey = tw.decrypt(self.b1b2)
# its ok to reuse; ecb doesn't keep state info
self.hshkey = tw.decrypt(self.b3b4)
log.debug("Encryption key K: %s " % repr(self.enckey))
log.debug("HMAC Key L: %s " % repr(self.hshkey))
def decrypt_data(self):
"""Decrypt encrypted portion of header and data"""
log.debug("Creating mcrypt object")
tw = MCRYPT('twofish', 'cbc')
log.debug("Adding key & iv")
tw.init(self.enckey, self.iv)
log.debug("Decrypting data")
self.fulldata = tw.decrypt(self.cryptdata)
def decrypt_data(self):
"""Decrypt encrypted portion of header and data"""
log.debug("Creating mcrypt object")
tw = MCRYPT('twofish', 'cbc')
log.debug("Adding key & iv")
tw.init(self.enckey, self.iv)
log.debug("Decrypting data")
self.fulldata = tw.decrypt(self.cryptdata)
def decryptXtea(key, iv, str):
m = MCRYPT('xtea', 'ecb')
key = key.ljust(m.get_key_size(), "\0")
iv = iv.ljust(m.get_iv_size(), "\0")
m.init(key, iv)
return m.decrypt(str)
def decrypt_data(self):
"""Decrypt encrypted portion of header and data"""
tw = MCRYPT('twofish', 'cbc')
tw.init(self.enckey, self.iv)
self.fulldata = tw.decrypt(self.cryptdata)
def decrypt_data(self):
"""Decrypt encrypted portion of header and data"""
tw = MCRYPT('twofish', 'cbc')
tw.init(self.enckey, self.iv)
self.fulldata = tw.decrypt(self.cryptdata)
