java sha256 解密_如何解密SHA-256加密字符串？
如何解密SHA-256加密字符串？
我有一个使用以下方法编码的字符串，有没有办法将此字符串解码回原始值？谢谢。public synchronized String encode(String password)
throws NoSuchAlgorithmException, IOException {
String encodedPassword = null;
byte[] salt = base64ToByte(saltChars);
MessageDigest digest = MessageDigest.getInstance("SHA-256");
digest.reset();
digest.update(salt);
byte[] btPass = digest.digest(password.getBytes("UTF-8"));
for (int i = 0; i
digest.reset();
btPass = digest.digest(btPass);
}
encodedPassword = byteToBase64(btPass);
return encodedPassword;}private byte[] base64ToByte(String str) throws IOException {
BASE64Decoder decoder = new BASE64Decoder();
byte[] returnbyteArray = decoder.decodeBuffer(str);
return returnbyteArray;}private String byteToBase64(byte[] bt) {
BASE64Encoder endecoder = new BASE64Encoder();
String returnString = endecoder.encode(bt);
return returnString;}