javax.crypto.KeyGenerator#getProvider ( )源码实例Demo

下面列出了javax.crypto.KeyGenerator#getProvider ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： markdown-image-kit 文件： COSCryptoModuleBase.java

/**
 * @param kekMaterials non-null encryption materials
 */
protected final SecretKey generateCEK(final EncryptionMaterials kekMaterials,
        final Provider providerIn) {
    final String keygenAlgo = contentCryptoScheme.getKeyGeneratorAlgorithm();
    KeyGenerator generator;
    try {
        generator = providerIn == null ? KeyGenerator.getInstance(keygenAlgo)
                : KeyGenerator.getInstance(keygenAlgo, providerIn);
        generator.init(contentCryptoScheme.getKeyLengthInBits(),
                cryptoScheme.getSecureRandom());
        // Set to true if the key encryption involves the use of BC's public key
        boolean involvesBCPublicKey = false;
        KeyPair keypair = kekMaterials.getKeyPair();
        if (keypair != null) {
            String keyWrapAlgo =
                    cryptoScheme.getKeyWrapScheme().getKeyWrapAlgorithm(keypair.getPublic());
            if (keyWrapAlgo == null) {
                Provider provider = generator.getProvider();
                String providerName = provider == null ? null : provider.getName();
                involvesBCPublicKey = CryptoRuntime.BOUNCY_CASTLE_PROVIDER.equals(providerName);
            }
        }
        SecretKey secretKey = generator.generateKey();
        if (!involvesBCPublicKey || secretKey.getEncoded()[0] != 0)
            return secretKey;
        for (int retry = 0; retry < 10; retry++) {
            secretKey = generator.generateKey();
            if (secretKey.getEncoded()[0] != 0)
                return secretKey;
        }
        // The probability of getting here is 2^80, which is impossible in practice.
        throw new CosClientException("Failed to generate secret key");
    } catch (NoSuchAlgorithmException e) {
        throw new CosClientException(
                "Unable to generate envelope symmetric key:" + e.getMessage(), e);
    }
}

源代码2 项目： cos-java-sdk-v5 文件： COSCryptoModuleBase.java

/**
 * @param kekMaterials non-null encryption materials
 */
protected final SecretKey generateCEK(final EncryptionMaterials kekMaterials,
        final Provider providerIn) {
    final String keygenAlgo = contentCryptoScheme.getKeyGeneratorAlgorithm();
    KeyGenerator generator;
    try {
        generator = providerIn == null ? KeyGenerator.getInstance(keygenAlgo)
                : KeyGenerator.getInstance(keygenAlgo, providerIn);
        generator.init(contentCryptoScheme.getKeyLengthInBits(),
                cryptoScheme.getSecureRandom());
        // Set to true if the key encryption involves the use of BC's public key
        boolean involvesBCPublicKey = false;
        KeyPair keypair = kekMaterials.getKeyPair();
        if (keypair != null) {
            String keyWrapAlgo =
                    cryptoScheme.getKeyWrapScheme().getKeyWrapAlgorithm(keypair.getPublic());
            if (keyWrapAlgo == null) {
                Provider provider = generator.getProvider();
                String providerName = provider == null ? null : provider.getName();
                involvesBCPublicKey = CryptoRuntime.BOUNCY_CASTLE_PROVIDER.equals(providerName);
            }
        }
        SecretKey secretKey = generator.generateKey();
        if (!involvesBCPublicKey || secretKey.getEncoded()[0] != 0)
            return secretKey;
        for (int retry = 0; retry < 10; retry++) {
            secretKey = generator.generateKey();
            if (secretKey.getEncoded()[0] != 0)
                return secretKey;
        }
        // The probability of getting here is 2^80, which is impossible in practice.
        throw new CosClientException("Failed to generate secret key");
    } catch (NoSuchAlgorithmException e) {
        throw new CosClientException(
                "Unable to generate envelope symmetric key:" + e.getMessage(), e);
    }
}

源代码3 项目： java_security 文件： AESTest.java

public static void bcAES()
{
	try 
	{
		Security.addProvider(new BouncyCastleProvider());
		
		// 生成KEY
		KeyGenerator keyGenerator = KeyGenerator.getInstance("AES", "BC");	
		keyGenerator.getProvider();
		keyGenerator.init(128);
		// 产生密钥
		SecretKey secretKey = keyGenerator.generateKey();
		// 获取密钥
		byte[] keyBytes = secretKey.getEncoded();
		
		
		// KEY转换
		Key key = new SecretKeySpec(keyBytes, "AES");
		
		
		// 加密
		Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, key);
		byte[] result = cipher.doFinal(src.getBytes());
		System.out.println("bc aes encrypt:" + Hex.encodeHexString(result));
		
		// 解密
		cipher.init(Cipher.DECRYPT_MODE, key);
		result = cipher.doFinal(result);
		System.out.println("bc aes decrypt:" + new String(result));
		
	} catch (Exception e) {
		e.printStackTrace();
	}
}

源代码4 项目： java_security 文件： DESTest.java

public static void bcDES()
{
	try 
	{
		Security.addProvider(new BouncyCastleProvider());
		
		// 生成KEY
		KeyGenerator keyGenerator = KeyGenerator.getInstance("DES", "BC");
		keyGenerator.getProvider();
		keyGenerator.init(56);
		// 产生密钥
		SecretKey secretKey = keyGenerator.generateKey();
		// 获取密钥
		byte[] bytesKey = secretKey.getEncoded();
		
		
		// KEY转换
		DESKeySpec desKeySpec = new DESKeySpec(bytesKey);
		SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");
		Key convertSecretKey = factory.generateSecret(desKeySpec);
		
		
		// 加密
		Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey);
		byte[] result = cipher.doFinal(src.getBytes());
		System.out.println("bc des encrypt:" + Hex.encodeHexString(result));
		
		// 解密
		cipher.init(Cipher.DECRYPT_MODE, convertSecretKey);
		result = cipher.doFinal(result);
		System.out.println("bc des decrypt:" + new String(result));
		
	} catch (Exception e) {
		e.printStackTrace();
	}
}

源代码5 项目： java_security 文件： DES3Test.java

public static void bc3DES()
{
	try 
	{
		Security.addProvider(new BouncyCastleProvider());
		
		// 生成KEY
		KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede", "BC");
		keyGenerator.getProvider();
		keyGenerator.init(168);
		// 产生密钥
		SecretKey secretKey = keyGenerator.generateKey();
		// 获取密钥
		byte[] bytesKey = secretKey.getEncoded();
		
		
		// KEY转换
		DESedeKeySpec desKeySpec = new DESedeKeySpec(bytesKey);
		SecretKeyFactory factory = SecretKeyFactory.getInstance("DESede");
		Key convertSecretKey = factory.generateSecret(desKeySpec);
		
		
		// 加密
		Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey);
		byte[] result = cipher.doFinal(src.getBytes());
		System.out.println("bc 3des encrypt:" + Hex.encodeHexString(result));
		
		// 解密
		cipher.init(Cipher.DECRYPT_MODE, convertSecretKey);
		result = cipher.doFinal(result);
		System.out.println("bc 3des decrypt:" + new String(result));
		
	} catch (Exception e) {
		e.printStackTrace();
	}
}

源代码6 项目： ibm-cos-sdk-java 文件： S3CryptoModuleBase.java

/**
 * @param kekMaterials non-null encryption materials
 */
protected final SecretKey generateCEK(
        final EncryptionMaterials kekMaterials,
        final Provider providerIn) {
    final String keygenAlgo = contentCryptoScheme.getKeyGeneratorAlgorithm();
    KeyGenerator generator;
    try {
        generator = providerIn == null
            ? KeyGenerator.getInstance(keygenAlgo)
            : KeyGenerator.getInstance(keygenAlgo, providerIn);
        generator.init(contentCryptoScheme.getKeyLengthInBits(),
                cryptoScheme.getSecureRandom());
        // Set to true iff the key encryption involves the use of BC's public key
        boolean involvesBCPublicKey = false;
        KeyPair keypair = kekMaterials.getKeyPair();
        if (keypair != null) {
            String keyWrapAlgo = cryptoScheme.getKeyWrapScheme().getKeyWrapAlgorithm(keypair.getPublic());
            if (keyWrapAlgo == null) {
                Provider provider = generator.getProvider();
                String providerName = provider == null ? null : provider.getName();
                involvesBCPublicKey = CryptoRuntime.BOUNCY_CASTLE_PROVIDER.equals(providerName);
            }
        }
        SecretKey secretKey = generator.generateKey();
        if (!involvesBCPublicKey || secretKey.getEncoded()[0] != 0)
            return secretKey;
        for (int retry = 0; retry < 9; retry++) {
            // Regenerate the random key due to a bug/feature in BC:
            // https://github.com/aws/aws-sdk-android/issues/15
            secretKey = generator.generateKey();
            if (secretKey.getEncoded()[0] != 0)
                return secretKey;
        }
        // The probability of getting here is 2^80, which is impossible in practice.
        throw new SdkClientException("Failed to generate secret key");
    } catch (NoSuchAlgorithmException e) {
        throw new SdkClientException(
                "Unable to generate envelope symmetric key:"
                        + e.getMessage(), e);
    }
}

方法所在类

javax.crypto.KeyGenerator