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babafeng/java-aes-demo-AESCrypto

Created December 28, 2016 06:10
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使用java-aes加密解密
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java-aes-demo-AESCrypto
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
/**
* @author babafeng
* @date : 2016年12月28日 下午2:09:05
*/
public class AESCrypto {
private static final String SHA_MODE = "SHA-256";
private static final String AES_MODE = "AES/ECB/PKCS5Padding";
public static SecretKeySpec initKey(String mkey) {
byte[] key;
MessageDigest sha = null;
SecretKeySpec secretKey = null;
try {
key = mkey.getBytes("UTF-8");
sha = MessageDigest.getInstance(SHA_MODE);
key = sha.digest(key);
key = Arrays.copyOf(key, 16);
secretKey = new SecretKeySpec(key, "AES");
return secretKey;
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return secretKey;
}
public static String encrypt(String key, String message) {
String encode = null;
try {
SecretKeySpec secretKey = AESCrypto.initKey(key);
Cipher cipher = Cipher.getInstance(AES_MODE);
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
encode = Base64.getEncoder().encodeToString(cipher.doFinal(message.getBytes("UTF-8")));
return encode;
} catch (Exception e) {
e.printStackTrace();
}
return encode;
}
public static String decrypt(String key, String enMessage) {
String message = null;
try {
SecretKeySpec secretKey = AESCrypto.initKey(key);
Cipher cipher = Cipher.getInstance(AES_MODE);
cipher.init(Cipher.DECRYPT_MODE, secretKey);
message = new String(cipher.doFinal(Base64.getDecoder().decode(enMessage)));
return message;
} catch (Exception e) {
e.printStackTrace();
}
return message;
}
public static void main(String args[]) {
final String message = "1234567890987654321";
final String key = "7894564123698521471";
String enMessage = encrypt(key, message.trim());
String deMessage = decrypt(key, enMessage.trim());
System.out.println("加密密钥: " + key);
System.out.println("加密前的内容: " + message);
System.out.println("加密后的内容: " + enMessage);
System.out.println("解密后的内容: " + deMessage);
}
}
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