android 字符串加解密算法

android 字符串加解密算法

/**
*加密
**/
private String encryptPassword(String clearText) {
try {
DESKeySpec keySpec = new DESKeySpec(
BuildConfig.PASSWORD_ENC_SECRET.getBytes("UTF-8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey key = keyFactory.generateSecret(keySpec);

Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.ENCRYPT_MODE, key);
String encrypedPwd = Base64.encodeToString(cipher.doFinal(clearText
.getBytes("UTF-8")), Base64.DEFAULT);
return encrypedPwd;
} catch (Exception e) {
}
return clearText;
}

/**
*解密
**/
private String decryptPassword(String encryptedPwd) {
try {
DESKeySpec keySpec = new DESKeySpec(BuildConfig.PASSWORD_ENC_SECRET.getBytes("UTF-8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey key = keyFactory.generateSecret(keySpec);

byte[] encryptedWithoutB64 = Base64.decode(encryptedPwd, Base64.DEFAULT);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] plainTextPwdBytes = cipher.doFinal(encryptedWithoutB64);
return new String(plainTextPwdBytes);
} catch (Exception e) {
}
return encryptedPwd;
}