Java Base64、AES、SHA1、MD5加密算法
参考地址http://www.open-open.com/lib/view/open1392185662160.html
package
com.example.decript;
import
java.io.UnsupportedEncodingException;
import
java.security.InvalidKeyException;
import
java.security.MessageDigest;
import
java.security.NoSuchAlgorithmException;
import
java.security.SecureRandom;
import
javax.crypto.BadPaddingException;
import
javax.crypto.Cipher;
import
javax.crypto.IllegalBlockSizeException;
import
javax.crypto.KeyGenerator;
import
javax.crypto.NoSuchPaddingException;
import
javax.crypto.SecretKey;
import
javax.crypto.spec.SecretKeySpec;
public
class
DecriptTest {
public
static
String SHA1(String decript) {
try
{
MessageDigest digest = java.security.MessageDigest
.getInstance(
"SHA-1"
);
digest.update(decript.getBytes());
byte
messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString =
new
StringBuffer();
// 字节数组转换为 十六进制 数
for
(
int
i =
0
; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] &
0xFF
);
if
(shaHex.length() <
2
) {
hexString.append(
0
);
}
hexString.append(shaHex);
}
return
hexString.toString();
}
catch
(NoSuchAlgorithmException e) {
e.printStackTrace();
}
return
""
;
}
public
static
String SHA(String decript) {
try
{
MessageDigest digest = java.security.MessageDigest
.getInstance(
"SHA"
);
digest.update(decript.getBytes());
byte
messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString =
new
StringBuffer();
// 字节数组转换为 十六进制 数
for
(
int
i =
0
; i < messageDigest.length; i++) {
String shaHex = Integer.toHexString(messageDigest[i] &
0xFF
);
if
(shaHex.length() <
2
) {
hexString.append(
0
);
}
hexString.append(shaHex);
}
return
hexString.toString();
}
catch
(NoSuchAlgorithmException e) {
e.printStackTrace();
}
return
""
;
}
public
static
String MD5(String input) {
try
{
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance(
"MD5"
);
// 使用指定的字节更新摘要
mdInst.update(input.getBytes());
// 获得密文
byte
[] md = mdInst.digest();
// 把密文转换成十六进制的字符串形式
StringBuffer hexString =
new
StringBuffer();
// 字节数组转换为 十六进制 数
for
(
int
i =
0
; i < md.length; i++) {
String shaHex = Integer.toHexString(md[i] &
0xFF
);
if
(shaHex.length() <
2
) {
hexString.append(
0
);
}
hexString.append(shaHex);
}
return
hexString.toString();
}
catch
(NoSuchAlgorithmException e) {
e.printStackTrace();
}
return
""
;
}
/**
* 加密
*
* @param content
* 需要加密的内容
* @param password
* 加密密码
* @return
*/
public
static
byte
[] encryptAES(String content, String password) {
try
{
KeyGenerator kgen = KeyGenerator.getInstance(
"AES"
);
kgen.init(
128
,
new
SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte
[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key =
new
SecretKeySpec(enCodeFormat,
"AES"
);
Cipher cipher = Cipher.getInstance(
"AES"
);
// 创建密码器
byte
[] byteContent = content.getBytes(
"utf-8"
);
cipher.init(Cipher.ENCRYPT_MODE, key);
// 初始化
byte
[] result = cipher.doFinal(byteContent);
return
result;
// 加密
}
catch
(NoSuchAlgorithmException e) {
e.printStackTrace();
}
catch
(NoSuchPaddingException e) {
e.printStackTrace();
}
catch
(InvalidKeyException e) {
e.printStackTrace();
}
catch
(UnsupportedEncodingException e) {
e.printStackTrace();
}
catch
(IllegalBlockSizeException e) {
e.printStackTrace();
}
catch
(BadPaddingException e) {
e.printStackTrace();
}
return
null
;
}
/**
* 解密
*
* @param content
* 待解密内容
* @param password
* 解密密钥
* @return
*/
public
static
byte
[] decryptAES(
byte
[] content, String password) {
try
{
KeyGenerator kgen = KeyGenerator.getInstance(
"AES"
);
kgen.init(
128
,
new
SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte
[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key =
new
SecretKeySpec(enCodeFormat,
"AES"
);
Cipher cipher = Cipher.getInstance(
"AES"
);
// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, key);
// 初始化
byte
[] result = cipher.doFinal(content);
return
result;
// 加密
}
catch
(NoSuchAlgorithmException e) {
e.printStackTrace();
}
catch
(NoSuchPaddingException e) {
e.printStackTrace();
}
catch
(InvalidKeyException e) {
e.printStackTrace();
}
catch
(IllegalBlockSizeException e) {
e.printStackTrace();
}
catch
(BadPaddingException e) {
e.printStackTrace();
}
return
null
;
}
/**
* BASE64解密
*
* @param key
* @return
* @throws Exception
*/
public
static
String decryptBASE64(String key) {
return
""
;
}
/**
* BASE64加密
*
* @param key
* @return
* @throws Exception
*/
public
static
String encryptBASE64(String key) {
return
""
;
}
}