//
//Copyright © Microsoft Corporation, All Rights Reserved
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//Licensed under the Apache License, Version 2.0 (the "License");
//you may not use this file except in compliance with the License.
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//http://www.apache.org/licenses/LICENSE-2.0
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//OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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//See the Apache License, Version 2.0 for the specific language
//governing permissions and limitations under the License.

package com.microsoft.azure.keyvault.extensions.test;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.fail;

import java.security.Provider;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

import org.apache.commons.codec.binary.Base64;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

import com.microsoft.azure.keyvault.core.IKey;
import com.microsoft.azure.keyvault.extensions.KeyVaultKeyResolver;
import com.microsoft.azure.keyvault.models.KeyBundle;
import com.microsoft.azure.keyvault.models.SecretBundle;
import com.microsoft.azure.keyvault.requests.CreateKeyRequest;
import com.microsoft.azure.keyvault.requests.SetSecretRequest;
import com.microsoft.azure.keyvault.webkey.JsonWebKeyType;

public class KeyVaultKeyResolverBCProviderTest extends KeyVaultClientIntegrationTestBase {

    private Provider provider = null;

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {
    }

    @Before
    public void setUp() throws Exception {
        try {
            provider = (Provider) Class.forName("org.bouncycastle.jce.provider.BouncyCastleProvider").newInstance();
        } catch (ClassNotFoundException | IllegalAccessException | InstantiationException ex) {
            throw new RuntimeException(ex.getMessage());
        }
    }

    @After
    public void tearDown() throws Exception {
    }

    private static final String KEY_NAME = "JavaExtensionKey";
    private static final String SECRET_NAME = "JavaExtensionSecret";
    private static final Base64 BASE_64 = new Base64(-1, null, true);

    @Test
    public void keyKeyVaultKeyResolverBCProviderTest() throws InterruptedException, ExecutionException {
        String testKeyName = KEY_NAME + "1";
        try {
            // Create a key on a vault.
            CreateKeyRequest request = new CreateKeyRequest.Builder(getVaultUri(), testKeyName, JsonWebKeyType.RSA).build();
            KeyBundle bundle = keyVaultClient.createKey(request);

            if (bundle != null) {
                try {
                    // ctor with client
                    KeyVaultKeyResolver resolver = new KeyVaultKeyResolver(keyVaultClient, provider);

                    Future<IKey> baseKeyFuture = resolver.resolveKeyAsync(bundle.keyIdentifier().baseIdentifier());
                    Future<IKey> versionKeyFuture = resolver.resolveKeyAsync(bundle.keyIdentifier().identifier());

                    IKey baseKey = baseKeyFuture.get();
                    IKey versionKey = versionKeyFuture.get();

                    Assert.assertEquals(baseKey.getKid(), versionKey.getKid());
                } finally {
                    // Delete the key
                    keyVaultClient.deleteKey(getVaultUri(), testKeyName);
                    pollOnKeyDeletion(getVaultUri(), testKeyName);
                    keyVaultClient.purgeDeletedKey(getVaultUri(), testKeyName);

                }
            }
        } catch (Exception ex) {
            Assert.fail(ex.getMessage());
        }
    }

    /*
     * Test resolving a key from a 128bit secret encoded as base64 in a vault using various KeyVaultKeyResolver constructors.
     */
    @Test
    public void secret128Base64KeyVaultKeyResolverBCProviderTest() throws InterruptedException, ExecutionException {
        // Arrange
        byte[] keyBytes = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F};
        byte[] cek = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88, (byte) 0x99, (byte) 0xAA, (byte) 0xBB, (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF};
        byte[] ek = {0x1F, (byte) 0xA6, (byte) 0x8B, 0x0A, (byte) 0x81, 0x12, (byte) 0xB4, 0x47, (byte) 0xAE, (byte) 0xF3, 0x4B, (byte) 0xD8, (byte) 0xFB, 0x5A, 0x7B, (byte) 0x82, (byte) 0x9D, 0x3E, (byte) 0x86, 0x23, 0x71, (byte) 0xD2, (byte) 0xCF, (byte) 0xE5};

        String testSecretName = SECRET_NAME + "1";
        try {

            SetSecretRequest request = new SetSecretRequest.Builder(getVaultUri(), testSecretName, BASE_64.encodeAsString(keyBytes)).withContentType("application/octet-stream").build();
            SecretBundle secretBundle = keyVaultClient.setSecret(request);

            if (secretBundle != null) {
                try {
                    // ctor with client
                    KeyVaultKeyResolver resolver = new KeyVaultKeyResolver(keyVaultClient);

                    IKey baseKey = resolver.resolveKeyAsync(secretBundle.secretIdentifier().baseIdentifier()).get();
                    IKey versionKey = resolver.resolveKeyAsync(secretBundle.secretIdentifier().identifier()).get();

                    // Check for correct key identifiers
                    Assert.assertEquals(baseKey.getKid(), versionKey.getKid());

                    // Ensure key operations give the expected results
                    byte[] encrypted = null;

                    try {
                        encrypted = baseKey.wrapKeyAsync(cek, "A128KW").get().getLeft();
                    } catch (Exception e) {
                        fail(e.getMessage());
                    }

                    // Assert
                    assertArrayEquals(ek, encrypted);

                    try {
                        encrypted = versionKey.wrapKeyAsync(cek, "A128KW").get().getLeft();
                    } catch (Exception e) {
                        fail(e.getMessage());
                    }

                    // Assert
                    assertArrayEquals(ek, encrypted);
                } finally {
                    // Delete the secret
                    keyVaultClient.deleteSecret(getVaultUri(), testSecretName);
                    pollOnSecretDeletion(getVaultUri(), testSecretName);
                    keyVaultClient.purgeDeletedSecret(getVaultUri(), testSecretName);

                }
            }
        } catch (Exception ex) {
            Assert.fail(ex.getMessage());
        }
    }

    /*
     * Test resolving a key from a 128bit secret encoded as base64 in a vault using various KeyVaultKeyResolver constructors.
     */
    @Test
    public void secret192Base64KeyVaultKeyResolverBCProviderTest() throws InterruptedException, ExecutionException {
        // Arrange
        byte[] keyBytes = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17};
        byte[] cek = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88, (byte) 0x99, (byte) 0xAA, (byte) 0xBB, (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF};
        byte[] ek = {(byte) 0x96, 0x77, (byte) 0x8B, 0x25, (byte) 0xAE, 0x6C, (byte) 0xA4, 0x35, (byte) 0xF9, 0x2B, 0x5B, (byte) 0x97, (byte) 0xC0, 0x50, (byte) 0xAE, (byte) 0xD2, 0x46, (byte) 0x8A, (byte) 0xB8, (byte) 0xA1, 0x7A, (byte) 0xD8, 0x4E, 0x5D};

        String testSecretName = SECRET_NAME + "2";
        try {
            SetSecretRequest request = new SetSecretRequest.Builder(getVaultUri(), testSecretName, BASE_64.encodeAsString(keyBytes)).withContentType("application/octet-stream").build();
            SecretBundle secretBundle = keyVaultClient.setSecret(request);

            if (secretBundle != null) {
                try {
                    // ctor with client
                    KeyVaultKeyResolver resolver = new KeyVaultKeyResolver(keyVaultClient, provider);

                    IKey baseKey = resolver.resolveKeyAsync(secretBundle.secretIdentifier().baseIdentifier()).get();
                    IKey versionKey = resolver.resolveKeyAsync(secretBundle.secretIdentifier().identifier()).get();

                    // Check for correct key identifiers
                    Assert.assertEquals(baseKey.getKid(), versionKey.getKid());

                    // Ensure key operations give the expected results
                    byte[] encrypted = null;

                    try {
                        encrypted = baseKey.wrapKeyAsync(cek, "A192KW").get().getLeft();
                    } catch (Exception e) {
                        fail(e.getMessage());
                    }

                    // Assert
                    assertArrayEquals(ek, encrypted);

                    try {
                        encrypted = versionKey.wrapKeyAsync(cek, "A192KW").get().getLeft();
                    } catch (Exception e) {
                        fail(e.getMessage());
                    }

                    // Assert
                    assertArrayEquals(ek, encrypted);
                } finally {
                    // Delete the key
                    keyVaultClient.deleteSecret(getVaultUri(), testSecretName);
                    pollOnSecretDeletion(getVaultUri(), testSecretName);
                    keyVaultClient.purgeDeletedSecret(getVaultUri(), testSecretName);
                }
            }
        } catch (Exception ex) {
            Assert.fail(ex.getMessage());
        }
    }

    /*
     * Test resolving a key from a 256bit secret encoded as base64 in a vault using various KeyVaultKeyResolver constructors.
     */
    @Test
    public void secret256Base64KeyVaultKeyResolverBCProviderTest() throws InterruptedException, ExecutionException {
        // Arrange
        byte[] keyBytes = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F};
        byte[] cek = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88, (byte) 0x99, (byte) 0xAA, (byte) 0xBB, (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF};
        byte[] ek = {0x64, (byte) 0xE8, (byte) 0xC3, (byte) 0xF9, (byte) 0xCE, 0x0F, 0x5B, (byte) 0xA2, 0x63, (byte) 0xE9, 0x77, 0x79, 0x05, (byte) 0x81, (byte) 0x8A, 0x2A, (byte) 0x93, (byte) 0xC8, 0x19, 0x1E, 0x7D, 0x6E, (byte) 0x8A, (byte) 0xE7};

        String testSecretName = SECRET_NAME + "3";

        try {
            SetSecretRequest request = new SetSecretRequest.Builder(getVaultUri(), testSecretName, BASE_64.encodeAsString(keyBytes)).withContentType("application/octet-stream").build();
            SecretBundle secretBundle = keyVaultClient.setSecret(request);

            if (secretBundle != null) {
                try {
                    // ctor with client
                    KeyVaultKeyResolver resolver = new KeyVaultKeyResolver(keyVaultClient, provider);

                    IKey baseKey = resolver.resolveKeyAsync(secretBundle.secretIdentifier().baseIdentifier()).get();
                    IKey versionKey = resolver.resolveKeyAsync(secretBundle.secretIdentifier().identifier()).get();

                    // Check for correct key identifiers
                    Assert.assertEquals(baseKey.getKid(), versionKey.getKid());

                    // Ensure key operations give the expected results
                    byte[] encrypted = null;

                    try {
                        encrypted = baseKey.wrapKeyAsync(cek, "A256KW").get().getLeft();
                    } catch (Exception e) {
                        fail(e.getMessage());
                    }

                    // Assert
                    assertArrayEquals(ek, encrypted);

                    try {
                        encrypted = versionKey.wrapKeyAsync(cek, "A256KW").get().getLeft();
                    } catch (Exception e) {
                        fail(e.getMessage());
                    }

                    // Assert
                    assertArrayEquals(ek, encrypted);
                } finally {
                    // Delete the key
                    keyVaultClient.deleteSecret(getVaultUri(), testSecretName);
                    pollOnSecretDeletion(getVaultUri(), testSecretName);
                    keyVaultClient.purgeDeletedSecret(getVaultUri(), testSecretName);
                }
            }
        } catch (Exception ex) {
            fail(ex.getMessage());
        }
    }
}
