def _encryptAsymmetric(payload, key, keyName, params):
"""
Encrypt the payload using the asymmetric key according to params, and
return an EncryptedContent.
:param Blob payload: The data to encrypt. The size should be within
range of the key.
:param Blob key: The key value.
:param Name keyName: The key name for the EncryptedContent key locator.
:param EncryptParams params: The parameters for encryption.
:return: A new EncryptedContent.
:rtype: EncryptedContent
"""
algorithmType = params.getAlgorithmType()
keyLocator = KeyLocator()
keyLocator.setType(KeyLocatorType.KEYNAME)
keyLocator.setKeyName(keyName)
if (algorithmType == EncryptAlgorithmType.RsaPkcs or
algorithmType == EncryptAlgorithmType.RsaOaep):
encryptedPayload = RsaAlgorithm.encrypt(key, payload, params)
result = EncryptedContent()
result.setAlgorithmType(algorithmType)
result.setKeyLocator(keyLocator)
result.setPayload(encryptedPayload)
return result
else:
raise RuntimeError("Unsupported encryption method")
def _encryptAsymmetric(payload, key, keyName, params):
"""
Encrypt the payload using the asymmetric key according to params, and
return an EncryptedContent.
:param Blob payload: The data to encrypt. The size should be within
range of the key.
:param Blob key: The key value.
:param Name keyName: The key name for the EncryptedContent key locator.
:param EncryptParams params: The parameters for encryption.
:return: A new EncryptedContent.
:rtype: EncryptedContent
"""
algorithmType = params.getAlgorithmType()
keyLocator = KeyLocator()
keyLocator.setType(KeyLocatorType.KEYNAME)
keyLocator.setKeyName(keyName)
if (algorithmType == EncryptAlgorithmType.RsaPkcs
or algorithmType == EncryptAlgorithmType.RsaOaep):
encryptedPayload = RsaAlgorithm.encrypt(key, payload, params)
result = EncryptedContent()
result.setAlgorithmType(algorithmType)
result.setKeyLocator(keyLocator)
result.setPayload(encryptedPayload)
return result
else:
raise RuntimeError("Unsupported encryption method")
def _encryptSymmetric(payload, key, keyName, params):
"""
Encrypt the payload using the symmetric key according to params, and
return an EncryptedContent.
:param Blob payload: The data to encrypt.
:param Blob key: The key value.
:param Name keyName: The key name for the EncryptedContent key locator.
:param EncryptParams params: The parameters for encryption.
:return: A new EncryptedContent.
:rtype: EncryptedContent
"""
algorithmType = params.getAlgorithmType()
initialVector = params.getInitialVector()
keyLocator = KeyLocator()
keyLocator.setType(KeyLocatorType.KEYNAME)
keyLocator.setKeyName(keyName)
if (algorithmType == EncryptAlgorithmType.AesCbc or
algorithmType == EncryptAlgorithmType.AesEcb):
if (algorithmType == EncryptAlgorithmType.AesCbc):
if initialVector.size() != AesAlgorithm.BLOCK_SIZE:
raise RuntimeError("incorrect initial vector size")
encryptedPayload = AesAlgorithm.encrypt(key, payload, params)
result = EncryptedContent()
result.setAlgorithmType(algorithmType)
result.setKeyLocator(keyLocator)
result.setPayload(encryptedPayload)
result.setInitialVector(initialVector)
return result
else:
raise RuntimeError("Unsupported encryption method")
def _encryptSymmetric(payload, key, keyName, params):
"""
Encrypt the payload using the symmetric key according to params, and
return an EncryptedContent.
:param Blob payload: The data to encrypt.
:param Blob key: The key value.
:param Name keyName: The key name for the EncryptedContent key locator.
:param EncryptParams params: The parameters for encryption.
:return: A new EncryptedContent.
:rtype: EncryptedContent
"""
algorithmType = params.getAlgorithmType()
initialVector = params.getInitialVector()
keyLocator = KeyLocator()
keyLocator.setType(KeyLocatorType.KEYNAME)
keyLocator.setKeyName(keyName)
if (algorithmType == EncryptAlgorithmType.AesCbc
or algorithmType == EncryptAlgorithmType.AesEcb):
if (algorithmType == EncryptAlgorithmType.AesCbc):
if initialVector.size() != AesAlgorithm.BLOCK_SIZE:
raise RuntimeError("incorrect initial vector size")
encryptedPayload = AesAlgorithm.encrypt(key, payload, params)
result = EncryptedContent()
result.setAlgorithmType(algorithmType)
result.setKeyLocator(keyLocator)
result.setPayload(encryptedPayload)
result.setInitialVector(initialVector)
return result
else:
raise RuntimeError("Unsupported encryption method")
