def generateKeyPair(self, keyName, params):
"""
Generate a pair of asymmetric keys.
:param Name keyName: The name of the key pair.
:param KeyParams params: The parameters of the key.
"""
if self.doesKeyExist(keyName, KeyClass.PUBLIC):
raise SecurityException("Public key already exists")
if self.doesKeyExist(keyName, KeyClass.PRIVATE):
raise SecurityException("Private key already exists")
try:
privateKey = TpmPrivateKey.generatePrivateKey(params)
privateKeyDer = privateKey.toPkcs8().toBytes()
publicKeyDer = privateKey.derivePublicKey().toBytes()
except Exception as ex:
raise SecurityException("Error in generatePrivateKey: " + str(ex))
keyUri = keyName.toUri()
keyFilePathNoExtension = self.maintainMapping(keyUri)
publicKeyFilePath = keyFilePathNoExtension + ".pub"
privateKeyFilePath = keyFilePathNoExtension + ".pri"
with open(publicKeyFilePath, 'w') as keyFile:
keyFile.write(Common.base64Encode(publicKeyDer, True))
with open(privateKeyFilePath, 'w') as keyFile:
keyFile.write(Common.base64Encode(privateKeyDer, True))
os.chmod(publicKeyFilePath, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
os.chmod(privateKeyFilePath, stat.S_IRUSR)
def generateKeyPair(self, keyName, params):
"""
Generate a pair of asymmetric keys.
:param Name keyName: The name of the key pair.
:param KeyParams params: The parameters of the key.
"""
if self.doesKeyExist(keyName, KeyClass.PUBLIC):
raise SecurityException("Public key already exists")
if self.doesKeyExist(keyName, KeyClass.PRIVATE):
raise SecurityException("Private key already exists")
try:
privateKey = TpmPrivateKey.generatePrivateKey(params)
privateKeyDer = privateKey.toPkcs8().toBytes()
publicKeyDer = privateKey.derivePublicKey().toBytes()
except Exception as ex:
raise SecurityException("Error in generatePrivateKey: " + str(ex))
keyUri = keyName.toUri()
keyFilePathNoExtension = self.maintainMapping(keyUri)
publicKeyFilePath = keyFilePathNoExtension + ".pub"
privateKeyFilePath = keyFilePathNoExtension + ".pri"
with open(publicKeyFilePath, 'w') as keyFile:
keyFile.write(Common.base64Encode(publicKeyDer, True))
with open(privateKeyFilePath, 'w') as keyFile:
keyFile.write(Common.base64Encode(privateKeyDer, True))
os.chmod(publicKeyFilePath, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
os.chmod(privateKeyFilePath, stat.S_IRUSR)
def test_generate_key(self):
for dataSet in self.keyTestData:
key = TpmPrivateKey.generatePrivateKey(dataSet.keyParams)
publicKeyBits = key.derivePublicKey()
publicKey = PublicKey(publicKeyBits)
data = Blob([0x01, 0x02, 0x03, 0x04])
# Sign and verify.
signature = key.sign(data.toBytes(), DigestAlgorithm.SHA256)
result = VerificationHelpers.verifySignature(
data, signature, publicKey)
self.assertTrue(result)
# Check that another generated private key is different.
key2 = TpmPrivateKey.generatePrivateKey(dataSet.keyParams)
self.assertTrue(not key.toPkcs8().equals(key2.toPkcs8()))
def test_generate_key(self):
for dataSet in self.keyTestData:
key = TpmPrivateKey.generatePrivateKey(dataSet.keyParams)
publicKeyBits = key.derivePublicKey()
publicKey = PublicKey(publicKeyBits)
data = Blob([0x01, 0x02, 0x03, 0x04])
# Sign and verify.
signature = key.sign(data.toBytes(), DigestAlgorithm.SHA256)
result = VerificationHelpers.verifySignature(
data, signature, publicKey)
self.assertTrue(result)
# Check that another generated private key is different.
key2 = TpmPrivateKey.generatePrivateKey(dataSet.keyParams)
self.assertTrue(not key.toPkcs8().equals(key2.toPkcs8()))
def generateKey(params):
"""
Generate a new random decrypt key for RSA based on the given params.
:param RsaKeyParams params: The key params with the key size (in bits).
:return: The new decrypt key (PKCS8-encoded private key).
:rtype: DecryptKey
"""
privateKey = TpmPrivateKey.generatePrivateKey(params)
return DecryptKey(privateKey.toPkcs8())
def test_generate_key(self):
for dataSet in self.keyTestData:
key = TpmPrivateKey.generatePrivateKey(dataSet.keyParams)
publicKeyBits = key.derivePublicKey()
publicKey = PublicKey(publicKeyBits)
data = Blob([0x01, 0x02, 0x03, 0x04])
# Sign and verify.
signature = key.sign(data.toBytes(), DigestAlgorithm.SHA256)
# TODO: Move verify into PublicKey?
if dataSet.keyParams.getKeyType() == KeyType.ECDSA:
cryptoPublicKey = load_der_public_key(
publicKeyBits.toBytes(), backend = default_backend())
verifier = cryptoPublicKey.verifier(
signature.toBytes(), ec.ECDSA(hashes.SHA256()))
verifier.update(data.toBytes())
try:
verifier.verify()
result = True
except InvalidSignature:
result = False
elif dataSet.keyParams.getKeyType() == KeyType.RSA:
cryptoPublicKey = load_der_public_key(
publicKeyBits.toBytes(), backend = default_backend())
verifier = cryptoPublicKey.verifier(
signature.toBytes(), padding.PKCS1v15(), hashes.SHA256())
verifier.update(data.toBytes())
try:
verifier.verify()
result = True
except InvalidSignature:
result = False
else:
# We don't expect this.
self.fail("Unrecognized key type")
self.assertTrue(result)
# Check that another generated private key is different.
key2 = TpmPrivateKey.generatePrivateKey(dataSet.keyParams)
self.assertTrue(not key.toPkcs8().equals(key2.toPkcs8()))
def generateKey(params):
"""
Generate a new random decrypt key for RSA based on the given params.
:param RsaKeyParams params: The key params with the key size (in bits).
:return: The new decrypt key (PKCS8-encoded private key).
:rtype: DecryptKey
"""
privateKey = TpmPrivateKey.generatePrivateKey(params)
return DecryptKey(privateKey.toPkcs8())
def generateKeyPair(self, keyName, params):
"""
Generate a pair of asymmetric keys.
:param Name keyName: The name of the key pair.
:param KeyParams params: The parameters of the key.
"""
privateKey = None
try:
privateKey = TpmPrivateKey.generatePrivateKey(params)
except Exception as ex:
raise SecurityException("Error in generatePrivateKey: " + str(ex))
publicKeyDer = None
try:
publicKeyDer = privateKey.derivePublicKey()
except Exception as ex:
raise SecurityException("Error in derivePublicKey: " + str(ex))
self._privateKeyStore[keyName.toUri()] = privateKey
self._publicKeyStore[keyName.toUri()] = PublicKey(publicKeyDer)
def generateKeyPair(self, keyName, params):
"""
Generate a pair of asymmetric keys.
:param Name keyName: The name of the key pair.
:param KeyParams params: The parameters of the key.
"""
privateKey = None
try:
privateKey = TpmPrivateKey.generatePrivateKey(params)
except Exception as ex:
raise SecurityException("Error in generatePrivateKey: " + str(ex))
publicKeyDer = None
try:
publicKeyDer = privateKey.derivePublicKey()
except Exception as ex:
raise SecurityException("Error in derivePublicKey: " + str(ex))
self._privateKeyStore[keyName.toUri()] = privateKey
self._publicKeyStore[keyName.toUri()] = PublicKey(publicKeyDer)
def _doCreateKey(self, identityName, params):
"""
Create a key for identityName according to params. The created key is
named as: /<identityName>/[keyId]/KEY . The key name is set in the
returned TpmKeyHandle.
:param Name identityName: The name if the identity.
:param KeyParams params: The KeyParams for creating the key.
:return: The handle of the created key.
:rtype: TpmKeyHandle
:raises TpmBackEnd.Error: If the key cannot be created.
"""
try:
key = TpmPrivateKey.generatePrivateKey(params)
except Exception as ex:
raise TpmBackEndFile.Error(
"Error in TpmPrivateKey.generatePrivateKey: " + str(ex))
keyHandle = TpmKeyHandleMemory(key)
TpmBackEnd.setKeyName(keyHandle, identityName, params)
self._saveKey(keyHandle.getKeyName(), key)
return keyHandle
def _doCreateKey(self, identityName, params):
"""
Create a key for identityName according to params. The created key is
named as: /<identityName>/[keyId]/KEY . The key name is set in the
returned TpmKeyHandle.
:param Name identityName: The name if the identity.
:param KeyParams params: The KeyParams for creating the key.
:return: The handle of the created key.
:rtype: TpmKeyHandle
:raises TpmBackEnd.Error: If the key cannot be created.
"""
try:
key = TpmPrivateKey.generatePrivateKey(params)
except Exception as ex:
raise TpmBackEndFile.Error(
"Error in TpmPrivateKey.generatePrivateKey: " + str(ex))
keyHandle = TpmKeyHandleMemory(key)
TpmBackEnd.setKeyName(keyHandle, identityName, params)
self._saveKey(keyHandle.getKeyName(), key)
return keyHandle