SHA:安全散列算法简析 附实例

  commons-codeccommons-codec1.10

 import org.apache.commons.codec.digest.DigestUtils; public class ShaTest { public static void main(String [] args){ String str="123"; String sha1HexStr=DigestUtils.sha1Hex(str.getBytes()); System.out.println("SHA1"+":"+sha1HexStr.length()+";"+sha1HexStr); String sha256HexStr=DigestUtils.sha256Hex(str.getBytes()); System.out.println("SHA256"+":"+sha256HexStr.length()+";"+sha256HexStr); String sha384HexStr=DigestUtils.sha384Hex(str.getBytes()); System.out.println("SHA384"+":"+sha384HexStr.length()+";"+sha384HexStr); String sha512HexStr=DigestUtils.sha512Hex(str.getBytes()); System.out.println("SHA512"+":"+sha512HexStr.length()+";"+sha512HexStr); } } 

 package cn.mars.app.txn.wanglian; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Sha1Util { /** * SHA1签名 * @param paramStr 要加签的字符串 * @return */ public static String SHA1(String paramStr) { MessageDigest alg; String result = ""; String tmp = ""; try { alg = MessageDigest.getInstance("SHA-1"); alg.update(paramStr.getBytes()); byte[] bts = alg.digest(); for (int i = 0; i 

 package com.enterise.test; public class SHA1 { private final int[] abcde = { 0x67452301,0xefcdab89,0x98badcfe, 0x10325476,0xc3d2e1f0 }; // 摘要数据存储数组 private int[] digestInt = new int[5]; // 计算过程中的临时数据存储数组 private int[] tmpData = new int[80]; //	测试 public static void main(String[] args) { String param = ""; System.out.println("加密前：" + param); System.out.println("length-->"+param.length()); String digest = new SHA1().getDigestOfString(param.getBytes()); System.out.println("加密后：" + digest); System.out.println("length-->"+digest.length()); } // 计算sha-1摘要 private int process_input_bytes(byte[] bytedata) { // 初试化常量 System.arraycopy(abcde,0,digestInt,0,abcde.length); // 格式化输入字节数组，补10及长度数据 byte[] newbyte = byteArrayFormatData(bytedata); // 获取数据摘要计算的数据单元个数 int MCount = newbyte.length / 64; // 循环对每个数据单元进行摘要计算 for (int pos = 0; pos > 8) & 0xFF); byte h6 = (byte) ((N >> 16) & 0xFF); byte h5 = (byte) ((N >> 24) & 0xFF); byte h4 = (byte) ((N >> 32) & 0xFF); byte h3 = (byte) ((N >> 40) & 0xFF); byte h2 = (byte) ((N >> 48) & 0xFF); byte h1 = (byte) (N >> 56); newbyte[l++] = h1; newbyte[l++] = h2; newbyte[l++] = h3; newbyte[l++] = h4; newbyte[l++] = h5; newbyte[l++] = h6; newbyte[l++] = h7; newbyte[l++] = h8; return newbyte; } private int f1(int x,int y,int z) { return (x & y) | (~x & z); } private int f2(int x,int y,int z) { return x ^ y ^ z; } private int f3(int x,int y,int z) { return (x & y) | (x & z) | (y & z); } private int f4(int x,int y) { return (x << y) | x >>> (32 - y); } // //	单元摘要计算函数 private void encrypt() { for (int i = 16; i <= 79; i++) { tmpData[i] = f4(tmpData[i - 3] ^ tmpData[i - 8] ^ tmpData[i - 14] ^ tmpData[i - 16],1); } int[] tmpabcde = new int[5]; for (int i1 = 0; i1 >> 24); byteData[i + 1] = (byte) (intValue >>> 16); byteData[i + 2] = (byte) (intValue >>> 8); byteData[i + 3] = (byte) intValue; } // 将字节转换为十六进制字符串 private static String byteToHexString(byte ib) { char[] Digit = { '0','1','2','3','4','5','6','7','8','9','A', 'B','C','D','E','F' }; char[] ob = new char[2]; ob[0] = Digit[(ib >>> 4) & 0X0F]; ob[1] = Digit[ib & 0X0F]; String s = new String(ob); return s; } // 将字节数组转换为十六进制字符串 private static String byteArrayToHexString(byte[] bytearray) { String strDigest = ""; for (int i = 0; i