电子公文传输系统验收(MD5加密改为SM3加密)

原本的功能实现

用MD5加密算法对用户输入的密码进行加密,并存储在数据库中,以123456为例

这部分加密源代码如下:

package cn.edu.nuc.article.util;  

/** 
 * 采用MD5加密解密 
 * @author 仰望星空
 * @datetime 2023 12 20
 */  
public class MD5Helper {  
	
	public static void main(String[] args) {
		System.out.println(new MD5Helper().getTwiceMD5ofString("123456"));
	}
    
    // 标准的构造函数,调用md5Init函数进行初始化工作  
    public MD5Helper() {  
        md5Init();  
        return;  
    }  
      
    // RFC1321中定义的标准4*4矩阵的常量定义。  
    static final int S11 = 7, S12 = 12, S13 = 17, S14 = 22;  
    static final int S21 = 5, S22 = 9, S23 = 14, S24 = 20;  
    static final int S31 = 4, S32 = 11, S33 = 16, S34 = 23;  
    static final int S41 = 6, S42 = 10, S43 = 15, S44 = 21;  
  
    // 按RFC1321标准定义不可变byte型数组PADDING  
    static final byte[] PADDING = { -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  
  
    // MD5计算过程中的3组核心数据,采用数组形式存放  
    private long[] state = new long[4]; // 计算状态(分别对应a b c d)  
  
    private byte[] buffer = new byte[64]; // 分配64个字节私有缓冲区  
  
    private long[] count = new long[2]; // 位个数  
  
    // 最新一次计算结果的16进制ASCII字符串表示,代表了16个字符串形式的MD5值  
    public String resultStr;  
  
    // 最新一次计算结果的2进制数组表示,一共16个字节,代表了128bit形式的MD5值  
    public byte[] digest = new byte[16];  
  
      
    /** 
     * 获得两次MD5加密的字符串 
     * @param str 
     * @return 
     */  
    public String getTwiceMD5ofString(String str){  
        return getMD5ofStr(getMD5ofStr(str));  
    }  
      
    /** 
     * MD5_Encoding类提供的主要的接口函数getMD5ofStr,用来进行数据加密变换。调用其可对任意字符串进行加密运算,并以字符串形式返回加密结果。 
     * @param in 
     * @return 
     */  
    public String getMD5ofStr(String in) {  
        md5Init(); // 初始化  
        md5Update(in.getBytes(), in.length());// 调用MD5的主计算过程  
        md5Final(); // 输出结果到digest数组中  
        for (int i = 0; i < 16; i++) {  
            resultStr += byteToHEX(digest[i]); // 将digest数组中的每个byte型数据转为16进制形式的字符串  
        }  
        return resultStr;  
    }  
  
  
    // md5初始化函数.初始化核心变量.  
    private void md5Init() {  
        state[0] = 0x67452301L; // 定义state为RFC1321中定义的标准幻数  
        state[1] = 0xefcdab89L; // 定义state为RFC1321中定义的标准幻数  
        state[2] = 0x98badcfeL; // 定义state为RFC1321中定义的标准幻数  
        state[3] = 0x10325476L; // 定义state为RFC1321中定义的标准幻数  
        count[0] = count[1] = 0L; // 初始化为0  
        resultStr = "";// 初始化resultStr字符串为空  
        for (int i = 0; i < 16; i++)  
            digest[i] = 0;// 初始化digest数组元素为0  
        return;  
    }  
  
    // 定义F G H I 为4个基数 ,即为4个基本的MD5函数,进行简单的位运算  
    private long F(long x, long y, long z) {  
        return (x & y) | ((~x) & z);  
    }  
  
    private long G(long x, long y, long z) {  
        return (x & z) | (y & (~z));  
    }  
  
    private long H(long x, long y, long z) {  
        return x ^ y ^ z;  
    }  
  
    private long I(long x, long y, long z) {  
        return y ^ (x | (~z));  
    }  
  
    // FF,GG,HH和II调用F,G,H,I函数进行进一步变换  
    private long FF(long a, long b, long c, long d, long x, long s, long ac) {  
        a += F(b, c, d) + x + ac;  
        a = ((int) a << s) | ((int) a >>> (32 - s)); // 这里long型数据右移时使用无符号右移运算符>>>  
        a += b;  
        return a;  
    }  
  
    private long GG(long a, long b, long c, long d, long x, long s, long ac) {  
        a += G(b, c, d) + x + ac;  
        a = ((int) a << s) | ((int) a >>> (32 - s)); // 这里long型数据右移时使用无符号右移运算符>>>  
        a += b;  
        return a;  
    }  
  
    private long HH(long a, long b, long c, long d, long x, long s, long ac) {  
        a += H(b, c, d) + x + ac;  
        a = ((int) a << s) | ((int) a >>> (32 - s));// 这里long型数据右移时使用无符号右移运算符>>>  
        a += b;  
        return a;  
    }  
  
    private long II(long a, long b, long c, long d, long x, long s, long ac) {  
        a += I(b, c, d) + x + ac;  
        a = ((int) a << s) | ((int) a >>> (32 - s));// 这里long型数据右移时使用无符号右移运算符>>>  
        a += b;  
        return a;  
    }  
  
    // MD5的主计算过程,input是需要变换的二进制字节串,inputlen是长度  
    private void md5Update(byte[] input, int inputLen) {  
        int i = 0, index, partLen;  
        byte[] block = new byte[64]; // 分配64个字节缓冲区  
        // 根据count计算index值。这里long型数据右移时使用无符号右移运算符>>>  
        index = (int) (count[0] >>> 3) & 0x3F;  
        if ((count[0] += (inputLen << 3)) < (inputLen << 3))  
            count[1]++;  
        count[1] += (inputLen >>> 29); // 这里int型数据右移时使用无符号右移运算符>>>  
        partLen = 64 - index; // 计算partLen值  
        if (inputLen >= partLen) {  
            md5Memcpy(buffer, input, index, 0, partLen);  
            md5Transform(buffer);  
            for (i = partLen; i + 63 < inputLen; i += 64) {  
                md5Memcpy(block, input, 0, i, 64);  
                md5Transform(block);  
            }  
            index = 0;  
        } else  
            i = 0;  
        md5Memcpy(buffer, input, index, i, inputLen - i);  
    }  
  
    // 整理和填写输出结果,结果放到数组digest中。  
    private void md5Final() {  
        byte[] bits = new byte[8];  
        int index, padLen;  
        Encode(bits, count, 8);  
        index = (int) (count[0] >>> 3) & 0x3f; // 这里long型数据右移时使用无符号右移运算符>>>  
        padLen = (index < 56) ? (56 - index) : (120 - index);  
        md5Update(PADDING, padLen);  
        md5Update(bits, 8);  
        Encode(digest, state, 16);  
    }  
  
    // byte数组的块拷贝函数,将input数组中的起始位置为inpos,长度len的数据拷贝到output数组起始位置outpos处。  
    private void md5Memcpy(byte[] output, byte[] input, int outpos, int inpos, int len) {  
        int i;  
        for (i = 0; i < len; i++)  
            output[outpos + i] = input[inpos + i];  
    }  
  
    // MD5核心变换计算程序,由md5Update函数调用,block是分块的原始字节数组  
    private void md5Transform(byte block[]) {  
        long a = state[0], b = state[1], c = state[2], d = state[3];  
        long[] x = new long[16];  
        Decode(x, block, 64);  
        // 进行4级级联运算  
        // 第1级  
        a = FF(a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */  
        d = FF(d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */  
        c = FF(c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */  
        b = FF(b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */  
        a = FF(a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */  
        d = FF(d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */  
        c = FF(c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */  
        b = FF(b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */  
        a = FF(a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */  
        d = FF(d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */  
        c = FF(c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */  
        b = FF(b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */  
        a = FF(a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */  
        d = FF(d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */  
        c = FF(c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */  
        b = FF(b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */  
  
        // 第2级  
        a = GG(a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */  
        d = GG(d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */  
        c = GG(c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */  
        b = GG(b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */  
        a = GG(a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */  
        d = GG(d, a, b, c, x[10], S22, 0x2441453L); /* 22 */  
        c = GG(c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */  
        b = GG(b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */  
        a = GG(a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */  
        d = GG(d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */  
        c = GG(c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */  
        b = GG(b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */  
        a = GG(a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */  
        d = GG(d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */  
        c = GG(c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */  
        b = GG(b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */  
  
        // 第3级  
        a = HH(a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */  
        d = HH(d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */  
        c = HH(c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */  
        b = HH(b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */  
        a = HH(a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */  
        d = HH(d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */  
        c = HH(c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */  
        b = HH(b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */  
        a = HH(a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */  
        d = HH(d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */  
        c = HH(c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */  
        b = HH(b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */  
        a = HH(a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */  
        d = HH(d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */  
        c = HH(c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */  
        b = HH(b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */  
  
        // 第4级  
        a = II(a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */  
        d = II(d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */  
        c = II(c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */  
        b = II(b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */  
        a = II(a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */  
        d = II(d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */  
        c = II(c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */  
        b = II(b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */  
        a = II(a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */  
        d = II(d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */  
        c = II(c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */  
        b = II(b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */  
        a = II(a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */  
        d = II(d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */  
        c = II(c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */  
        b = II(b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */  
  
        // 分别累加到state[0],state[1],state[2],state[3]  
        state[0] += a;  
        state[1] += b;  
        state[2] += c;  
        state[3] += d;  
    }  
  
    // 把byte型数据转换为无符号long型数据  
    private static long byteToul(byte b) {  
        return b > 0 ? b : (b & 0x7F + 128);  
    }  
  
    // 把byte类型的数据转换成十六进制ASCII字符表示  
    private static String byteToHEX(byte in) {  
        char[] DigitStr = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };  
        char[] out = new char[2];  
        out[0] = DigitStr[(in >> 4) & 0x0F]; // 取高4位  
        out[1] = DigitStr[in & 0x0F]; // 取低4位  
        String s = new String(out);  
        return s;  
    }  
  
    // 将long型数组按顺序拆成byte型数组,长度为len  
    private void Encode(byte[] output, long[] input, int len) {  
        int i, j;  
        for (i = 0, j = 0; j < len; i++, j += 4) {  
            output[j] = (byte) (input[i] & 0xffL);  
            output[j + 1] = (byte) ((input[i] >>> 8) & 0xffL);  
            output[j + 2] = (byte) ((input[i] >>> 16) & 0xffL);  
            output[j + 3] = (byte) ((input[i] >>> 24) & 0xffL);  
        }  
    }  
  
    // 将byte型数组按顺序合成long型数组,长度为len  
    private void Decode(long[] output, byte[] input, int len) {  
        int i, j;  
        for (i = 0, j = 0; j < len; i++, j += 4)  
            output[i] = byteToul(input[j]) | (byteToul(input[j + 1]) << 8) | (byteToul(input[j + 2]) << 16) | (byteToul(input[j + 3]) << 24);  
        return;  
    }  
  
}  

  • 代码中的 md5Update、md5Final 和 md5Transform 等方法实现了MD5算法的核心计算过程。

  • 初始化: md5Init 方法对MD5算法的状态进行初始化,包括设置初始的计算状态、缓冲区和计数器等。

  • 数据更新: md5Update 方法用于更新MD5算法的内部状态,将输入数据按照一定规则进行分块处理。

  • 计算最终结果: md5Final 方法用于整理和填写输出结果,将最终的哈希值存储在 digest 数组中。

  • 字符串表示: getMD5ofStr 方法将字节数组表示的MD5值转换为字符串形式。

  • Twice MD5: getTwiceMD5ofString 方法对输入字符串进行两次MD5加密,返回最终的加密结果。

实际加密结果

123456的MD5一次加密:E10ADC3949BA59ABBE56E057F20F883E。
123456的MD5二次加密:F59BD65F7EDAFB087A81D4DCA06C4910。

数据库中密码显示如下

改为用SM3实现

代码文件名修改

类名修改

调用名修改(MD5Helper改为SM3Helper)


源代码如下

import java.nio.charset.StandardCharsets;

public class SM3Helper {

    private static final int[] Tj = new int[64];

    static {
        for (int j = 0; j < 16; j++) {
            Tj[j] = 0x79cc4519;
        }
        for (int j = 16; j < 64; j++) {
            Tj[j] = 0x7a879d8a;
        }
    }

    private static int FF(int X, int Y, int Z, int j) {
        if (j < 16) {
            return X ^ Y ^ Z;
        } else {
            return (X & Y) | (X & Z) | (Y & Z);
        }
    }

    private static int GG(int X, int Y, int Z, int j) {
        if (j < 16) {
            return X ^ Y ^ Z;
        } else {
            return (X & Y) | (~X & Z);
        }
    }

    private static int P0(int X) {
        return X ^ (X << 9 | X >>> 23) ^ (X << 17 | X >>> 15);
    }

    private static int P1(int X) {
        return X ^ (X << 15 | X >>> 17) ^ (X << 23 | X >>> 9);
    }

    private static byte[] sm3(byte[] input) {
        int[] v = new int[8];
        System.arraycopy(SM3Consts.IV, 0, v, 0, v.length);

        // 对消息进行填充
        byte[] paddedInput = padInput(input);

        // 进行消息处理
        for (int offset = 0; offset < paddedInput.length; offset += 64) {
            int[] block = new int[16];
            for (int i = 0; i < 16; i++) {
                block[i] = (paddedInput[offset + i * 4] & 0xFF) << 24
                        | (paddedInput[offset + i * 4 + 1] & 0xFF) << 16
                        | (paddedInput[offset + i * 4 + 2] & 0xFF) << 8
                        | (paddedInput[offset + i * 4 + 3] & 0xFF);
            }

            sm3ProcessBlock(v, block);
        }

        // 返回计算结果
        byte[] result = new byte[32];
        for (int i = 0; i < 8; i++) {
            result[i * 4] = (byte) (v[i] >>> 24);
            result[i * 4 + 1] = (byte) (v[i] >>> 16);
            result[i * 4 + 2] = (byte) (v[i] >>> 8);
            result[i * 4 + 3] = (byte) v[i];
        }
        return result;
    }

    private static byte[] padInput(byte[] input) {
        // 具体的填充实现,这里只是简化版本,实际中需要考虑消息长度的处理等
        // 这里假设输入的长度不超过 2^61 - 1 个字节
        int originalLength = input.length;
        int paddedLength = originalLength + 1 + 8;
        int paddingBytes = 64 - paddedLength % 64;

        byte[] paddedInput = new byte[paddedLength + paddingBytes];
        System.arraycopy(input, 0, paddedInput, 0, originalLength);
        paddedInput[originalLength] = (byte) 0x80;

        long bitLength = (long) originalLength * 8;
        for (int i = 0; i < 8; i++) {
            paddedInput[paddedLength + i] = (byte) (bitLength >>> (56 - i * 8));
        }

        return paddedInput;
    }

private static void sm3ProcessBlock(int[] v, int[] block) {
    int[] w = new int[68];
    int[] w1 = new int[64];

    for (int i = 0; i < 16; i++) {
        w[i] = block[i];
    }

    for (int i = 16; i < 68; i++) {
        w[i] = P1(w[i - 16] ^ w[i - 9] ^ (w[i - 3] << 15 | w[i - 3] >>> 17))
                ^ (w[i - 13] << 7 | w[i - 13] >>> 25) ^ w[i - 6];
    }

    for (int i = 0; i < 64; i++) {
        w1[i] = w[i] ^ w[i + 4];
    }

    int a = v[0];
    int b = v[1];
    int c = v[2];
    int d = v[3];
    int e = v[4];
    int f = v[5];
    int g = v[6];
    int h = v[7];

    for (int i = 0; i < 64; i++) {
        int ss1 = (a << 12 | a >>> 20) + e + (Tj[i] << 12 | Tj[i] >>> 20);
        ss1 = (ss1 << 7 | ss1 >>> 25) ^ ((ss1 << 12 | ss1 >>> 20) & (ss1 << 17 | ss1 >>> 15));
        int ss2 = FF(a, b, c, i) + d + ss1 + w1[i];

        int tt1 = GG(e, f, g, i) + h + ss2 + w[i];
        int tt2 = P0(e) + FF(e, f, g, i) + tt1;

        d = c;
        c = (b << 9 | b >>> 23);
        b = a;
        a = tt2;
        h = g;
        g = (f << 19 | f >>> 13);
        f = e;
        e = P0(tt1);
    }

    v[0] ^= a;
    v[1] ^= b;
    v[2] ^= c;
    v[3] ^= d;
    v[4] ^= e;
    v[5] ^= f;
    v[6] ^= g;
    v[7] ^= h;
}


    public static String getSM3ofStr(String str) {
        byte[] data = str.getBytes(StandardCharsets.UTF_8);
        byte[] result = sm3(data);
        return bytesToHexString(result);
    }

    private static String bytesToHexString(byte[] bytes) {
        StringBuilder hexString = new StringBuilder();
        for (byte b : bytes) {
            String hex = Integer.toHexString(0xFF & b);
            if (hex.length() == 1) {
                hexString.append('0');
            }
            hexString.append(hex);
        }
        return hexString.toString();
    }

    public static void main(String[] args) {
        System.out.println(getSM3ofStr("123456"));
    }
}

class SM3Consts {
    static final int[] IV = {
            0x7380166F, 0x4914B2B9, 0x172442D7, 0xDA8A0600,
            0xA96F30BC, 0x163138AA, 0xE38DEE4D, 0xB0FB0E4E
    };
}

加密结果数据库截图

posted @ 2023-12-20 13:57  LLLZTTT  阅读(156)  评论(0编辑  收藏  举报
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