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cn.t.util.security.message.AlgorithmUtil Maven / Gradle / Ivy
package cn.t.util.security.message;
import javax.crypto.*;
import java.security.*;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
public class AlgorithmUtil {
/**
* generate key generator
*
* @param algorithm 算法
* @param length 密钥长度
* @param provider 算法提供商
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static KeyGenerator generateKeyGenerator(String algorithm, int length, String provider) throws NoSuchAlgorithmException, NoSuchProviderException {
KeyGenerator keyGenerator;
if (provider != null) {
keyGenerator = KeyGenerator.getInstance(algorithm, provider);
} else {
keyGenerator = KeyGenerator.getInstance(algorithm);
}
if (length > 0) {
keyGenerator.init(length);
}
return keyGenerator;
}
/**
* generate key generator
*
* @param algorithm 算法
* @param length 密钥长度
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static KeyGenerator generateKeyGenerator(String algorithm, int length) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateKeyGenerator(algorithm, length, null);
}
/**
* generate key generator
*
* @param algorithm 算法
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static KeyGenerator generateKeyGenerator(String algorithm) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateKeyGenerator(algorithm, -1, null);
}
/**
* secret key generator
*
* @param algorithm 算法
* @param length 密钥长度
* @param provider 算法提供商
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static Key generateSecretKey(String algorithm, int length, String provider) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateKeyGenerator(algorithm, length, provider).generateKey();
}
/**
* secret key generator
*
* @param algorithm 算法
* @param length 密钥长度
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static Key generateSecretKey(String algorithm, int length) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateKeyGenerator(algorithm, length).generateKey();
}
/**
* secret key generator
*
* @param algorithm 算法
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static Key generateSecretKey(String algorithm) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateKeyGenerator(algorithm).generateKey();
}
public static KeyPairGenerator generateKeyPairGenerator(String algorithm, int length) throws NoSuchAlgorithmException {
KeyPairGenerator senderKeyPairGenerator = KeyPairGenerator.getInstance(algorithm);
senderKeyPairGenerator.initialize(length);
return senderKeyPairGenerator;
}
public static KeyPairGenerator generateKeyPairGenerator(String algorithm, AlgorithmParameterSpec params, SecureRandom secureRandom) throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
KeyPairGenerator senderKeyPairGenerator = KeyPairGenerator.getInstance(algorithm);
if (secureRandom != null) {
senderKeyPairGenerator.initialize(params, secureRandom);
} else {
senderKeyPairGenerator.initialize(params);
}
return senderKeyPairGenerator;
}
public static KeyPairGenerator generateKeyPairGenerator(String algorithm, AlgorithmParameterSpec params) throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
return generateKeyPairGenerator(algorithm, params, null);
}
public static KeyPair generateKeyPair(String algorithm, int length) throws NoSuchAlgorithmException {
KeyPairGenerator senderKeyPairGenerator = generateKeyPairGenerator(algorithm, length);
return senderKeyPairGenerator.generateKeyPair();
}
public static KeyPair generateKeyPair(String algorithm, AlgorithmParameterSpec params, SecureRandom secureRandom) throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
KeyPairGenerator senderKeyPairGenerator = generateKeyPairGenerator(algorithm, params, secureRandom);
return senderKeyPairGenerator.generateKeyPair();
}
public static KeyPair generateKeyPair(String algorithm, AlgorithmParameterSpec params) throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
return generateKeyPair(algorithm, params, null);
}
public static KeyFactory generateKeyFactory(String algorithm) throws NoSuchAlgorithmException {
return KeyFactory.getInstance(algorithm);
}
/**
* generate secret key encoded bytes
*
* @param algorithm 算法
* @param length 密钥长度
* @param provider 算法提供商
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static byte[] generateSecretKeyEncodedBytes(String algorithm, int length, String provider) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateSecretKey(algorithm, length, provider).getEncoded();
}
/**
* generate secret key encoded bytes
*
* @param algorithm 算法
* @param length 密钥长度
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static byte[] generateSecretKeyEncodedBytes(String algorithm, int length) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateSecretKey(algorithm, length).getEncoded();
}
/**
* generate secret key encoded bytes
*
* @param algorithm 算法
* @return xxx
* @throws NoSuchAlgorithmException xxx
* @throws NoSuchProviderException xxx
*/
public static byte[] generateSecretKeyEncodedBytes(String algorithm) throws NoSuchAlgorithmException, NoSuchProviderException {
return generateSecretKey(algorithm).getEncoded();
}
/**
* encrypt data
*
* @param cipher cipher
* @param key key
* @param algorithmParameterSpec 算法参数
* @param content 要加密的内容
* @return xxx
* @throws InvalidKeyException xxx
* @throws BadPaddingException xxx
* @throws IllegalBlockSizeException xxx
* @throws InvalidAlgorithmParameterException xxx
*/
public static byte[] encrypt(Cipher cipher, Key key, AlgorithmParameterSpec algorithmParameterSpec, byte[] content) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
if (algorithmParameterSpec != null) {
cipher.init(Cipher.ENCRYPT_MODE, key, algorithmParameterSpec);
} else {
cipher.init(Cipher.ENCRYPT_MODE, key);
}
return cipher.doFinal(content);
}
/**
* encrypt data
*
* @param cipher cipher
* @param key key
* @param content 要加密的内容
* @return xxx
* @throws InvalidKeyException xxx
* @throws BadPaddingException xxx
* @throws IllegalBlockSizeException xxx
* @throws InvalidAlgorithmParameterException xxx
*/
public static byte[] encrypt(Cipher cipher, Key key, byte[] content) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
return encrypt(cipher, key, null, content);
}
/**
* decrypt data
*
* @param cipher cipher
* @param key key
* @param algorithmParameterSpec xxx
* @param content 要解密的内容
* @return xxx
* @throws InvalidKeyException xxx
* @throws BadPaddingException xxx
* @throws IllegalBlockSizeException xxx
* @throws InvalidAlgorithmParameterException xxx
*/
public static byte[] decrypt(Cipher cipher, Key key, AlgorithmParameterSpec algorithmParameterSpec, byte[] content) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
if (algorithmParameterSpec != null) {
cipher.init(Cipher.DECRYPT_MODE, key, algorithmParameterSpec);
} else {
cipher.init(Cipher.DECRYPT_MODE, key);
}
return cipher.doFinal(content);
}
/**
* decrypt data
*
* @param cipher cipher
* @param key key
* @param content 要解密的内容
* @return xxx
* @throws InvalidKeyException xxx
* @throws BadPaddingException xxx
* @throws IllegalBlockSizeException xxx
* @throws InvalidAlgorithmParameterException xxx
*/
public static byte[] decrypt(Cipher cipher, Key key, byte[] content) throws InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException {
return decrypt(cipher, key, null, content);
}
public static AlgorithmParameterGenerator generateAlgorithmParameterGenerator(String algorithm) throws NoSuchAlgorithmException {
return AlgorithmParameterGenerator.getInstance(algorithm);
}
public static AlgorithmParameters generateAlgorithmParameters(String algorithm, int length) throws NoSuchAlgorithmException {
AlgorithmParameterGenerator algorithmParameterGenerator = generateAlgorithmParameterGenerator(algorithm);
algorithmParameterGenerator.init(length);
return algorithmParameterGenerator.generateParameters();
}
public static AlgorithmParameterSpec generateAlgorithmParameterSpec(String algorithm, int length, Class type) throws NoSuchAlgorithmException, InvalidParameterSpecException {
AlgorithmParameters algorithmParameters = generateAlgorithmParameters(algorithm, length);
return algorithmParameters.getParameterSpec(type);
}
/**
* 生成随机种子
* @param length xxx
* @return xxx
*/
public static byte[] generateSeedBytes(int length) {
SecureRandom secureRandom = new SecureRandom();
return secureRandom.generateSeed(length);
}
public static Mac generateMac(String algorithm, Key secretKey) throws NoSuchAlgorithmException, InvalidKeyException {
Mac mac = Mac.getInstance(algorithm);
mac.init(secretKey);
return mac;
}
public static Signature generateSenderSignature(String algorithm, PrivateKey privateKey) throws NoSuchAlgorithmException, InvalidKeyException {
Signature signature = Signature.getInstance(algorithm);
signature.initSign(privateKey);
return signature;
}
public static byte[] signData(String algorithm, PrivateKey privateKey, byte[] content) throws InvalidKeyException, NoSuchAlgorithmException, SignatureException {
Signature signature = generateSenderSignature(algorithm, privateKey);
signature.update(content);
return signature.sign();
}
public static Signature generateReceiverSignature(String algorithm, PublicKey publicKey) throws NoSuchAlgorithmException, InvalidKeyException {
Signature signature = Signature.getInstance(algorithm);
signature.initVerify(publicKey);
return signature;
}
public static boolean verifySign(String algorithm, PublicKey publicKey, byte[] content, byte[] sign) throws InvalidKeyException, NoSuchAlgorithmException, SignatureException {
Signature signature = generateReceiverSignature(algorithm, publicKey);
signature.update(content);
return signature.verify(sign);
}
}
