use of com.google.cloud.kms.v1.PublicKey in project java-kms by googleapis.
the class GetPublicKey method getPublicKey.
// Get the public key associated with an asymmetric key.
public void getPublicKey(String projectId, String locationId, String keyRingId, String keyId, String keyVersionId) throws IOException, GeneralSecurityException {
// safely clean up any remaining background resources.
try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
// Build the key version name from the project, location, key ring, key,
// and key version.
CryptoKeyVersionName keyVersionName = CryptoKeyVersionName.of(projectId, locationId, keyRingId, keyId, keyVersionId);
// Get the public key.
PublicKey publicKey = client.getPublicKey(keyVersionName);
System.out.printf("Public key: %s%n", publicKey.getPem());
}
}
use of com.google.cloud.kms.v1.PublicKey in project java-docs-samples by GoogleCloudPlatform.
the class VerifyAsymmetricEc method verifyAsymmetricEc.
// Verify the signature of a message signed with an RSA key.
public void verifyAsymmetricEc(String projectId, String locationId, String keyRingId, String keyId, String keyVersionId, String message, byte[] signature) throws IOException, GeneralSecurityException {
// safely clean up any remaining background resources.
try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
// Build the name from the project, location, and key ring, key, and key version.
CryptoKeyVersionName keyVersionName = CryptoKeyVersionName.of(projectId, locationId, keyRingId, keyId, keyVersionId);
// Convert the message into bytes. Cryptographic plaintexts and
// ciphertexts are always byte arrays.
byte[] plaintext = message.getBytes(StandardCharsets.UTF_8);
// Get the public key.
PublicKey publicKey = client.getPublicKey(keyVersionName);
// Convert the public PEM key to a DER key (see helper below).
byte[] derKey = convertPemToDer(publicKey.getPem());
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(derKey);
java.security.PublicKey ecKey = KeyFactory.getInstance("EC").generatePublic(keySpec);
// Verify the 'RSA_SIGN_PKCS1_2048_SHA256' signature.
// For other key algorithms:
// http://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#Signature
Signature ecVerify = Signature.getInstance("SHA256withECDSA");
ecVerify.initVerify(ecKey);
ecVerify.update(plaintext);
// Verify the signature.
boolean verified = ecVerify.verify(signature);
System.out.printf("Signature verified: %s", verified);
}
}
use of com.google.cloud.kms.v1.PublicKey in project java-docs-samples by GoogleCloudPlatform.
the class VerifyAsymmetricRsa method verifyAsymmetricRsa.
// Verify the signature of a message signed with an RSA key.
public void verifyAsymmetricRsa(String projectId, String locationId, String keyRingId, String keyId, String keyVersionId, String message, byte[] signature) throws IOException, GeneralSecurityException {
// safely clean up any remaining background resources.
try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
// Build the name from the project, location, and key ring, key, and key version.
CryptoKeyVersionName keyVersionName = CryptoKeyVersionName.of(projectId, locationId, keyRingId, keyId, keyVersionId);
// Convert the message into bytes. Cryptographic plaintexts and
// ciphertexts are always byte arrays.
byte[] plaintext = message.getBytes(StandardCharsets.UTF_8);
// Get the public key.
PublicKey publicKey = client.getPublicKey(keyVersionName);
// Convert the public PEM key to a DER key (see helper below).
byte[] derKey = convertPemToDer(publicKey.getPem());
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(derKey);
java.security.PublicKey rsaKey = KeyFactory.getInstance("RSA").generatePublic(keySpec);
// Verify the 'RSA_SIGN_PKCS1_2048_SHA256' signature.
// For other key algorithms:
// http://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#Signature
Signature rsaVerify = Signature.getInstance("SHA256withRSA");
rsaVerify.initVerify(rsaKey);
rsaVerify.update(plaintext);
// Verify the signature.
boolean verified = rsaVerify.verify(signature);
System.out.printf("Signature verified: %s", verified);
}
}
use of com.google.cloud.kms.v1.PublicKey in project java-docs-samples by GoogleCloudPlatform.
the class SnippetsIT method testDecryptAsymmetric.
@Test
public void testDecryptAsymmetric() throws IOException, GeneralSecurityException {
String plaintext = "my message";
byte[] ciphertext;
try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
CryptoKeyVersionName keyVersionName = CryptoKeyVersionName.of(PROJECT_ID, LOCATION_ID, KEY_RING_ID, ASYMMETRIC_DECRYPT_KEY_ID, "1");
PublicKey publicKey = client.getPublicKey(keyVersionName);
byte[] derKey = convertPemToDer(publicKey.getPem());
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(derKey);
java.security.PublicKey rsaKey = KeyFactory.getInstance("RSA").generatePublic(keySpec);
Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-256AndMGF1Padding");
OAEPParameterSpec oaepParams = new OAEPParameterSpec("SHA-256", "MGF1", MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT);
cipher.init(Cipher.ENCRYPT_MODE, rsaKey, oaepParams);
ciphertext = cipher.doFinal(plaintext.getBytes(StandardCharsets.UTF_8));
}
new DecryptAsymmetric().decryptAsymmetric(PROJECT_ID, LOCATION_ID, KEY_RING_ID, ASYMMETRIC_DECRYPT_KEY_ID, "1", ciphertext);
assertThat(stdOut.toString()).contains("my message");
}
use of com.google.cloud.kms.v1.PublicKey in project java-docs-samples by GoogleCloudPlatform.
the class EncryptAsymmetric method encryptAsymmetric.
// Encrypt data that was encrypted using the public key component of the given
// key version.
public void encryptAsymmetric(String projectId, String locationId, String keyRingId, String keyId, String keyVersionId, String plaintext) throws IOException, GeneralSecurityException {
// safely clean up any remaining background resources.
try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
// Build the key version name from the project, location, key ring, key,
// and key version.
CryptoKeyVersionName keyVersionName = CryptoKeyVersionName.of(projectId, locationId, keyRingId, keyId, keyVersionId);
// Get the public key.
PublicKey publicKey = client.getPublicKey(keyVersionName);
// Convert the public PEM key to a DER key (see helper below).
byte[] derKey = convertPemToDer(publicKey.getPem());
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(derKey);
java.security.PublicKey rsaKey = KeyFactory.getInstance("RSA").generatePublic(keySpec);
// Encrypt plaintext for the 'RSA_DECRYPT_OAEP_2048_SHA256' key.
// For other key algorithms:
// https://docs.oracle.com/javase/7/docs/api/javax/crypto/Cipher.html
Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-256AndMGF1Padding");
OAEPParameterSpec oaepParams = new OAEPParameterSpec("SHA-256", "MGF1", MGF1ParameterSpec.SHA256, PSource.PSpecified.DEFAULT);
cipher.init(Cipher.ENCRYPT_MODE, rsaKey, oaepParams);
byte[] ciphertext = cipher.doFinal(plaintext.getBytes(StandardCharsets.UTF_8));
System.out.printf("Ciphertext: %s%n", ciphertext);
}
}
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