def _GetReader(self, algorithm, crypter, pub_key):
""" Gets a keyczar reader for the given algorithm and key set crypter"""
reader = readers.CreateReader(
self._GetKeyPath(algorithm + crypter + pub_key))
if crypter:
key_set_crypter = keyczar.Crypter.Read(self._GetKeyPath(crypter))
reader = readers.EncryptedReader(reader, key_set_crypter)
return reader
def CreateGenericKeyczar(loc, crypter=None):
if mock is not None:
return keyczar.GenericKeyczar(mock)
if loc is None:
raise errors.KeyczarError("Need location")
else:
reader = readers.FileReader(loc)
if crypter:
reader = readers.EncryptedReader(reader, crypter)
return keyczar.GenericKeyczar(reader)
def UseKey(purpose, loc, dest, crypter=None, msg="This is some test data"):
reader = readers.FileReader(loc)
answer = ""
if crypter:
reader = readers.EncryptedReader(reader, crypter)
if purpose == keyinfo.DECRYPT_AND_ENCRYPT:
answer = keyczar.Crypter(reader).Encrypt(msg)
elif purpose == keyinfo.SIGN_AND_VERIFY:
answer = keyczar.Signer(reader).Sign(msg)
util.WriteFile(answer, dest)
def CreateGenericKeyczar(loc, crypter=None):
if mock is not None:
return keyczar.GenericKeyczar(mock)
if loc is None:
raise errors.KeyczarError("Need location")
else:
generic = None
reader = readers.CreateReader(loc)
try:
if crypter:
reader = readers.EncryptedReader(reader, crypter)
generic = keyczar.GenericKeyczar(reader)
finally:
reader.Close()
return generic
