Examples with CryptoKeyVersionName com.google.cloud.kms.v1.CryptoKeyVersionName used on opensource projects

Example 21 with CryptoKeyVersionName

use of com.google.cloud.kms.v1.CryptoKeyVersionName in project java-docs-samples by GoogleCloudPlatform.

the class SignAsymmetric method signAsymmetric.

// Get the public key associated with an asymmetric key.
public void signAsymmetric(String projectId, String locationId, String keyRingId, String keyId, String keyVersionId, String message) 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);
        // Convert the message into bytes. Cryptographic plaintexts and
        // ciphertexts are always byte arrays.
        byte[] plaintext = message.getBytes(StandardCharsets.UTF_8);
        // Calculate the digest.
        MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
        byte[] hash = sha256.digest(plaintext);
        // Build the digest object.
        Digest digest = Digest.newBuilder().setSha256(ByteString.copyFrom(hash)).build();
        // Optional, but recommended: compute digest's CRC32C. See helper below.
        long digestCrc32c = getCrc32cAsLong(hash);
        // Sign the digest.
        AsymmetricSignRequest request = AsymmetricSignRequest.newBuilder().setName(keyVersionName.toString()).setDigest(digest).setDigestCrc32C(Int64Value.newBuilder().setValue(digestCrc32c).build()).build();
        AsymmetricSignResponse response = client.asymmetricSign(request);
        // https://cloud.google.com/kms/docs/data-integrity-guidelines
        if (!response.getVerifiedDigestCrc32C()) {
            throw new IOException("AsymmetricSign: request to server corrupted");
        }
        // See helper below.
        if (!crcMatches(response.getSignatureCrc32C().getValue(), response.getSignature().toByteArray())) {
            throw new IOException("AsymmetricSign: response from server corrupted");
        }
        // Get the signature.
        byte[] signature = response.getSignature().toByteArray();
        System.out.printf("Signature %s%n", signature);
    }
}

Example 22 with CryptoKeyVersionName

use of com.google.cloud.kms.v1.CryptoKeyVersionName 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);
    }
}

Example 23 with CryptoKeyVersionName

use of com.google.cloud.kms.v1.CryptoKeyVersionName 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);
    }
}

Example 24 with CryptoKeyVersionName

use of com.google.cloud.kms.v1.CryptoKeyVersionName 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");
}

Example 25 with CryptoKeyVersionName

use of com.google.cloud.kms.v1.CryptoKeyVersionName in project java-docs-samples by GoogleCloudPlatform.

the class SnippetsIT method testVerifyAsymmetricEc.

@Test
public void testVerifyAsymmetricEc() throws IOException, GeneralSecurityException {
    String message = "my message";
    byte[] signature;
    try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
        CryptoKeyVersionName versionName = CryptoKeyVersionName.of(PROJECT_ID, LOCATION_ID, KEY_RING_ID, ASYMMETRIC_SIGN_EC_KEY_ID, "1");
        MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
        byte[] hash = sha256.digest(message.getBytes(StandardCharsets.UTF_8));
        Digest digest = Digest.newBuilder().setSha256(ByteString.copyFrom(hash)).build();
        signature = client.asymmetricSign(versionName, digest).getSignature().toByteArray();
    }
    new VerifyAsymmetricEc().verifyAsymmetricEc(PROJECT_ID, LOCATION_ID, KEY_RING_ID, ASYMMETRIC_SIGN_EC_KEY_ID, "1", message, signature);
    assertThat(stdOut.toString()).contains("Signature");
}