RSA.rar_RSA算法_rsa_rsa java_rsa java_算法

package com.RSA; import java.math.BigInteger; //这是一个辅助工具，用于数据转换 public class MyTools { //字符串左边补0直到长度为i public String obox(String s,int i){ while(s.length()<i){ s="0"+s; } return s; } //字符串右边补0直到长度为i public String boxo(String s,int i){ while(s.length()<i){ s=s+"0"; } return s; } //将字符串变成16进制字符串 public String Str2hexStr(String s) { StringBuffer sb = new StringBuffer(); for(int i=0; i<s.length(); i++) { sb.append(obox(Integer.toHexString(s.charAt(i)),4)); } return sb.toString(); } //将16进制字符串变成字符串 public String hexStr2Str(String s) { StringBuffer sb = new StringBuffer(); int index = 0; int length = s.length(); while(index+4 <= length) { String sh = s.substring(index, index+4); sb.append((char) Integer.parseInt(sh, 16)); index += 4; } if(sb.charAt(sb.length()-1) == 0) { sb.deleteCharAt(sb.length()-1); } return sb.toString(); } //String数组转换为char数组 public char[] Ss2Cs(String[] s) { char[] result = new char[s.length]; for(int i=0; i<s.length; i++) { result[i] =(char) Integer.parseInt(s[i], 16); } return result; } //String转换为char数组 public char[] Str2Cs(String s) { char[] result = new char[s.length()/2]; for(int i=0; i<s.length()/2; i++) { StringBuffer sb = new StringBuffer();//(char)s.charAt(i)+s.charAt(i+1); sb.append(s.charAt(i*2));sb.append(s.charAt(i*2+1)); result[i] =(char) Integer.parseInt(sb.toString(), 16); } return result; } //hexString转换为数组 public char[] hexStr2Cs(String s) { //System.out.println("hexStr:" + s); char[] result = new char[s.length()/2]; for(int i=0; i<s.length()/2; i++) { StringBuffer sb = new StringBuffer();//(char)s.charAt(i)+s.charAt(i+1); sb.append(s.charAt(i*2)); sb.append(s.charAt(i*2+1)); result[i] =(char) Integer.parseInt(sb.toString(), 16); } return result; } //char数组转换为String数组 public String[] Cs2Ss(char[] s) { String[] result = new String[s.length]; for(int i=0; i<s.length; i++) { result[i] = Integer.toHexString(s[i]); } return result; } //char数组转换为hexString public String Cs2hexStr(char[] s) { StringBuffer sb = new StringBuffer(); for(int i=0; i<s.length; i++) { sb.append(obox(Integer.toHexString(s[i]),2)); } return sb.toString(); } //long转换为hexString public String long2hexStr(long lo) { return Long.toHexString(lo); } //longs数组转换为hexString public String longs2hexStr(long[] lo) { StringBuffer sb = new StringBuffer(); for(int i=0; i<lo.length; i++) { sb.append(Long.toHexString(lo[0])); sb.append(" "); } return sb.toString(); } //hexString转换为long public long hexStr2long(String s) { return Long.parseLong(s, 16); } //hexString转换为long数组 public long[] hexStr2longs(String s) { String[] ss = s.split(" "); long[] ls = new long[ss.length]; for(int i=0; i<ls.length; i++) { ls[i] = Long.parseLong(ss[i], 16); } return ls; } public String[] getStr(BigInteger p){ int e=16; String s=p.toString(); int n=s.length()/e; int k=s.length()%e; String[] zps=new String[n+1]; String ps=""; for(int i=0;i<n;i++){ ps=s.substring(i*e,i*e+e); zps[i]=ps; } ps=s.substring(n*e,n*e+k); zps[n]=ps; return zps; } }