package com.ruoyi.common.utils;

import java.security.MessageDigest;

public final class ShaUtil {

    public static String sha512(String plaintext) {
        return sha(plaintext, "SHA-512");
    }

    public static String sha256(String plaintext) {
        return sha(plaintext, "SHA-256");
    }

    private static String sha(String plaintext, String shaAlg) {

        if (plaintext == null || plaintext.length() == 0) {
            throw new IllegalArgumentException("Plain text must be not empty!!");
        }

        try {
            MessageDigest md = MessageDigest.getInstance(shaAlg);
            md.update(plaintext.getBytes());
            byte[] bytBuffer = md.digest();
            StringBuilder sb = new StringBuilder();

            for (byte b : bytBuffer) {
                String hex = Integer.toHexString(255 & b);
                if (hex.length() == 1) {
                    sb.append("0");
                }

                sb.append(hex);
            }

            return sb.toString();
        } catch (Exception e) {
            throw new IllegalStateException("do sha failed", e);
        }
    }
}