import javax.crypto.Cipher; |
import javax.crypto.spec.SecretKeySpec; |
import org.apache.commons.codec.binary.Base64; |
/** |
* |
* @author Administrator |
* |
*/ |
public class AES { |
// 加密 |
public static String Encrypt(String sSrc, String sKey) throws Exception { |
if (sKey == null ) { |
System.out.print( "Key为空null" ); |
return null ; |
} |
// 判断Key是否为16位 |
if (sKey.length() != 16 ) { |
System.out.print( "Key长度不是16位" ); |
return null ; |
} |
byte [] raw = sKey.getBytes( "utf-8" ); |
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES" ); |
Cipher cipher = Cipher.getInstance( "AES/ECB/PKCS5Padding" ); //"算法/模式/补码方式" |
cipher.init(Cipher.ENCRYPT_MODE, skeySpec); |
byte [] encrypted = cipher.doFinal(sSrc.getBytes( "utf-8" )); |
return new Base64().encodeToString(encrypted); //此处使用BASE64做转码功能,同时能起到2次加密的作用。 |
} |
// 解密 |
public static String Decrypt(String sSrc, String sKey) throws Exception { |
try { |
// 判断Key是否正确 |
if (sKey == null ) { |
System.out.print( "Key为空null" ); |
return null ; |
} |
// 判断Key是否为16位 |
if (sKey.length() != 16 ) { |
System.out.print( "Key长度不是16位" ); |
return null ; |
} |
byte [] raw = sKey.getBytes( "utf-8" ); |
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES" ); |
Cipher cipher = Cipher.getInstance( "AES/ECB/PKCS5Padding" ); |
cipher.init(Cipher.DECRYPT_MODE, skeySpec); |
byte [] encrypted1 = new Base64().decode(sSrc); //先用base64解密 |
try { |
byte [] original = cipher.doFinal(encrypted1); |
String originalString = new String(original, "utf-8" ); |
return originalString; |
} catch (Exception e) { |
System.out.println(e.toString()); |
return null ; |
} |
} catch (Exception ex) { |
System.out.println(ex.toString()); |
return null ; |
} |
} |
public static void main(String[] args) throws Exception { |
/* |
* 此处使用AES-128-ECB加密模式,key需要为16位。 |
*/ |
String cKey = "1234567890123456" ; |
// 需要加密的字串 |
String cSrc = "www.gowhere.so" ; |
System.out.println(cSrc); |
// 加密 |
String enString = AES.Encrypt(cSrc, cKey); |
System.out.println( "加密后的字串是:" + enString); |
// 解密 |
String DeString = AES.Decrypt(enString, cKey); |
System.out.println( "解密后的字串是:" + DeString); |
} |
} |
//源代码片段来自云代码http://yuncode.net |
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