def _decrypt(self, stream):
"""
Build the master key from header settings and key-hash list.
Start reading from `stream` after the header and decrypt all the data.
Remove padding as needed and feed into hashed block reader, set as
in-buffer.
"""
super(KDB4File, self)._decrypt(stream)
ciphername = self.header.ciphers.get(self.header.CipherID,
self.header.CipherID)
if ciphername == 'AES':
data = aes_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
elif ciphername == 'Twofish':
data = twofish_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
else:
raise IOError('Unsupported decryption type: %s' %
codecs.encode(ciphername, 'hex'))
length = len(self.header.StreamStartBytes)
if self.header.StreamStartBytes == data[:length]:
# skip startbytes and wrap data in a hashed block io
self.in_buffer = HashedBlockIO(initial_bytes=data[length:])
# set successful decryption flag
self.opened = True
else:
raise IOError('Master key invalid.')
def _decrypt(self, stream):
super(KDB3File, self)._decrypt(stream)
if self.header.encryption_flags[self.header.Flags-1] == 'AES':
data = aes_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
elif self.header.encryption_flags[self.header.Flags-1] == 'Twofish':
data = twofish_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
else:
raise IOError('Unsupported encryption type: %s'%self.header.encryption_flags.get(self.header['Flags']-1, self.header['Flags']-1))
if self.header.ContentHash == sha256(data):
# put data in bytes io
self.in_buffer = io.BytesIO(data)
# set successful decryption flag
self.opened = True
else:
raise IOError('Master key invalid.')
def _decrypt(self, stream):
super(KDB3File, self)._decrypt(stream)
data = aes_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
if self.header.ContentHash == sha256(data):
# put data in bytes io
self.in_buffer = io.BytesIO(data)
# set successful decryption flag
self.opened = True
else:
raise IOError('Master key invalid.')
def _decrypt(self, stream):
super(KDB3File, self)._decrypt(stream)
data = aes_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
if self.header.ContentHash == sha256(data):
# put data in bytes io
self.in_buffer = io.BytesIO(data)
# set successful decryption flag
self.opened = True
else:
raise IOError('Master key invalid.')
def _decrypt(self, stream):
"""
Build the master key from header settings and key-hash list.
Start reading from `stream` after the header and decrypt all the data.
Remove padding as needed and feed into hashed block reader, set as
in-buffer.
"""
super(KDB4File, self)._decrypt(stream)
data = aes_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
length = len(self.header.StreamStartBytes)
if self.header.StreamStartBytes == data[:length]:
# skip startbytes and wrap data in a hashed block io
self.in_buffer = HashedBlockIO(initial_bytes=data[length:])
# set successful decryption flag
self.opened = True
else:
raise IOError('Master key invalid.')
def _decrypt(self, stream):
"""
Build the master key from header settings and key-hash list.
Start reading from `stream` after the header and decrypt all the data.
Remove padding as needed and feed into hashed block reader, set as
in-buffer.
"""
super(KDB4File, self)._decrypt(stream)
data = aes_cbc_decrypt(stream.read(), self.master_key,
self.header.EncryptionIV)
data = unpad(data)
length = len(self.header.StreamStartBytes)
if self.header.StreamStartBytes == data[:length]:
# skip startbytes and wrap data in a hashed block io
self.in_buffer = HashedBlockIO(bytes=data[length:])
# set successful decryption flag
self.opened = True
else:
raise IOError('Master key invalid.')
def decrypt(self, encrypted_message):
encrypted_message = base64.b64decode(encrypted_message)
message = libkeepass_crypto.aes_cbc_decrypt(encrypted_message,
self.key, self.iv)
return libkeepass_crypto.unpad(message)
def decrypt(self, encrypted_message):
encrypted_message = base64.b64decode(encrypted_message)
message = libkeepass_crypto.aes_cbc_decrypt(encrypted_message, self.key, self.iv)
return libkeepass_crypto.unpad(message)