SHA演算法：簽名串SHA演算法Java語言參考(SHAHelper.java)

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SHAHelper.java

package com.util; /**  * @author wangxiangyu * @date：2017年10月16日 上午9:00:47  * 類說明：SHA簽名演算法 */public class SHAHelper {    private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5","6", "7", "8", "9", "A", "B", "C", "D", "E", "F"};        /**     * 轉換位元組數組為16進位字串     *      * @param b 位元組數組     * @return 16進位字串     */    public static String byteArrayToHexString(byte[] b) {        StringBuffer resultSb = new StringBuffer();        for (int i = 0; i < b.length; i++) {            resultSb.append(byteToHexString(b[i]));        }        return resultSb.toString();    }    private static String byteToHexString(byte b) {        int n = b;        if (n < 0)            n = 256 + n;        int d1 = n / 16;        int d2 = n % 16;        return hexDigits[d1] + hexDigits[d2];    }    /**     * SHA摘要計算(byte[]).     *      * @param src byte[]     * @throws Exception     * @return byte[] 16 bit digest     */    public static byte[] SHADigest(byte[] src) throws Exception {        java.security.MessageDigest alg = java.security.MessageDigest                .getInstance("SHA");        return alg.digest(src);    }        /**     * SHA摘要計算(String).     *      * @param src String型的目標串     * @throws Exception     * @return String     */    public static String SHADigest(String src) throws Exception {        return byteArrayToHexString(SHADigest(src.getBytes("UTF-8")));    }    /** Test crypt */    public static void main(String[] args) {        try {            // 獲得的明文資料            String serialNumber = "0101102010031723101273807F00179E";            String reqBizArgs = "<ReqBizArgs version=‘1‘><test>test</test></ReqBizArgs>";            String key = "8204CDBD76BB69DAE040007F010017A4";            String desStr = serialNumber + reqBizArgs + key;            System.out.println("原文串 desStr = ‘" + desStr + "‘");            // 產生Signature            String signature = SHADigest(desStr);            System.out.println("簽名串Signature = ‘" + signature + "‘");        } catch (Exception ex) {            ex.printStackTrace();        }    }}

 

SHA演算法：簽名串SHA演算法Java語言參考(SHAHelper.java)