3des base64 java_Java实现MD5, SHA-1, BASE64, 3DES加解密方法

以你之姓@ 2022-11-03 05:41 164阅读 0赞

importjava.security.MessageDigest;importjavax.crypto.Cipher;importjavax.crypto.SecretKey;importjavax.crypto.spec.SecretKeySpec;importsun.misc.BASE64Decoder;importsun.misc.BASE64Encoder;/\*\*\* Java 加解密工具类

\*@authormosesxin@gmail.com

\*\*/

public classEncryptUtil \{private static final String UTF8 = "utf-8";//定义 加密算法,可用 DES,DESede,Blowfish

private static final String ALGORITHM\_DESEDE = "DESede";/\*\*\* MD5数字签名

\*@paramsrc

\*@return\*@throwsException\*/

public String md5Digest(String src) throwsException \{//定义数字签名方法, 可用：MD5, SHA-1

MessageDigest md = MessageDigest.getInstance("MD5");byte\[\] b =md.digest(src.getBytes(UTF8));return this.byte2HexStr(b);

\}/\*\*\* BASE64 加密

\*@paramsrc

\*@return\*@throwsException\*/

public String base64Encoder(String src) throwsException \{

BASE64Encoder encoder= newBASE64Encoder();returnencoder.encode(src.getBytes(UTF8));

\}/\*\*\* BASE64解密

\*@paramdest

\*@return\*@throwsException\*/

public String base64Decoder(String dest) throwsException \{

BASE64Decoder decoder= newBASE64Decoder();return newString(decoder.decodeBuffer(dest), UTF8);

\}/\*\*\* 3DES加密

\*@paramsrc

\*@paramkey

\*@return\*@throwsException\*/

public String desedeEncoder(String src, String key) throwsException \{

SecretKey secretKey= newSecretKeySpec(build3DesKey(key), ALGORITHM\_DESEDE);

Cipher cipher=Cipher.getInstance(ALGORITHM\_DESEDE);

cipher.init(Cipher.ENCRYPT\_MODE, secretKey);byte\[\] b =cipher.doFinal(src.getBytes(UTF8));returnbyte2HexStr(b);

\}/\*\*\* 3DES解密

\*@paramdest

\*@paramkey

\*@return\*@throwsException\*/

public String desedeDecoder(String dest, String key) throwsException \{

SecretKey secretKey= newSecretKeySpec(build3DesKey(key), ALGORITHM\_DESEDE);

Cipher cipher=Cipher.getInstance(ALGORITHM\_DESEDE);

cipher.init(Cipher.DECRYPT\_MODE, secretKey);byte\[\] b =cipher.doFinal(str2ByteArray(dest));return newString(b, UTF8);

\}/\*\*\* 字节数组转化为大写16进制字符串

\*@paramb

\*@return

\*/

private String byte2HexStr(byte\[\] b) \{

StringBuilder sb= newStringBuilder();for (int i = 0; i < b.length; i++) \{

String s= Integer.toHexString(b\[i\] & 0xFF);if (s.length() == 1) \{

sb.append("0");

sb.append(s.toUpperCase());

\}returnsb.toString();

\}/\*\*\* 字符串转字节数组

\*@params

\*@return

\*/

private byte\[\] str2ByteArray(String s) \{int byteArrayLength = s.length()/2;byte\[\] b = new byte\[byteArrayLength\];for (int i = 0; i < byteArrayLength; i++) \{byte b0 = (byte) Integer.valueOf(s.substring(i\*2, i\*2+2), 16).intValue();

b\[i\]=b0;

\}returnb;

\}/\*\*\* 构造3DES加解密方法key

\*@paramkeyStr

\*@return\*@throwsException\*/

private byte\[\] build3DesKey(String keyStr) throwsException \{byte\[\] key = new byte\[24\];byte\[\] temp =keyStr.getBytes(UTF8);if (key.length >temp.length) \{

System.arraycopy(temp,0, key, 0, temp.length);

\}else\{

System.arraycopy(temp,0, key, 0, key.length);

\}returnkey;