easyre.exe
这题是一个傀儡进程题，先创建了easyre.exe进程，这个进程又创建了一个fake.exe进程，并且卸载了原fake.exe的内存，把主要逻辑又塞入了fake.exe的内存空间里。
我们可以查看ProcessInformation结构体的信息，里面保存了fake.exe的PID，ResumeThread就证实了我们需要分析fake.exe程序，这一步之后就会提示我们要输入flag了。所以我们直接 attach 填充好的 fake.exe 进程即可得到最终的逻辑。
记住要在ResumeThread之前附加，我们一开始附加到fake上，并找不到程序主函数逻辑，而是在ntdll里面，我这里的做法是，先用IDA附加之前用X32dbg附加了一下，查找字符串从而找到函数偏移。
偏移是0x402060，所以我们直接在IDA里面JMP过去
然后就是C转为代码，P声明函数，下断点调试了
这里有两个花指令，直接弄破，然后F7单步跟就会进入加密函数了
离的还是比较近的，可以F5看伪代码
sub_401F00是加密函数，很明显的XXTEA特征
我们提取一下key
现在我们找一下密文
这是strcmp函数，进去分析一下
地址405010的地址存放着密文
unsigned char ida_chars[] =
{
0x51, 0xDD, 0xC9, 0x22, 0x65, 0x16, 0x57, 0x85, 0xE8, 0x5D,
0x1D, 0x27, 0xA5, 0x7B, 0xCB, 0x92, 0x62, 0x96, 0x23, 0xAC,
0x55, 0xC4, 0x86, 0x1B, 0xB3, 0xE6, 0x05, 0xC1, 0x12, 0x56,
0x04, 0xB2
};现在我们套一个xxtea解密脚本,发现解不开，继续调试，发现最后居然还有个xor操作
off_4040EC是一个rand函数，随机数种子是13394
#include <cstdint>
#include <cstdlib>
#include <string>
#include <iostream>
#define DELTA 0x9e3779b9
#define MX (((z >> 5 ^ y << 2) + (y >> 3 ^ z << 4)) ^ ((sum ^ y) + (key[(p & 3) ^ e] ^ z)))
using namespace std;
void xxtea(uint32_t* v, int n, uint32_t const key[4]) {
uint32_t y, z, sum;
unsigned p, rounds, e;
if (n > 1) /* Coding Part */
{
rounds = 6 + 52 / n;
sum = 0;
z = v[n - 1];
do {
sum += DELTA;
e = (sum >> 2) & 3;
for (p = 0; p < n - 1; p++) {
y = v[p + 1];
z = v[p] += MX;
}
y = v[0];
z = v[n - 1] += MX;
} while (--rounds);
}
else if (n < -1) /* Decoding Part */
{
n = -n;
rounds = 6 + 52 / n;
sum = rounds * DELTA;
y = v[0];
do {
e = (sum >> 2) & 3;
for (p = n - 1; p > 0; p--) {
z = v[p - 1];
y = v[p] -= MX;
}
z = v[n - 1];
y = v[0] -= MX;
sum -= DELTA;
} while (--rounds);
}
}
int main()
{
srand(13394);
int keysteam[32] = { 0 };
for (size_t i = 0; i < 8; i++)
{
keysteam[i] = rand();
}
unsigned int v[8] = { 0x22C9DD51,0x85571665,0x271D5DE8,0x92CB7BA5,0x0AC239662,0x1B86C455,0x0C105E6B3,0x0B2045612 };
unsigned int key[4] = { 0x54,0x53,0x4e,0x42 };
for (size_t i = 0; i < 8; i++)
{
v[i] ^= keysteam[i];
}
xxtea(v, -8, key);
for (int i = 0; i < 8; i++)
{
printf("%c%c%c%c",*((char*)&v[i]+3),*((char*)&v[i]+2),*((char*)&v[i]+1),*((char*)&v[i]+0));
}
return 0;
}
#Sangfor{525a39d17ec49fd10294f99}babyre.exe
打开这题发现是一个自写的可执行文件，shift+f12搜索字符串，发现了一些提示
直接在这下访问断点，调试程序
进入了系统dll，我们找ret位置跳出来
text节位置存放在我们要分析的代码，稍微恢复一下，我们全部U掉，然后按c强转成代码，往上面翻了翻，想找到函数开始位置，找到一大块cc位置
接下来就往下无脑c和p
修复完的效果，原本的函数都是一块地址，需要我们c去修复
先分析一下sub_2D1920
这里两层的代码类似，我怀疑是hook了IsDebuggerPresent，看一下sub_2D14D0，这个是我修复完的效果
dword_2D514C这次不是函数了，我们分析一下sub_2D1430
我用IDA的插件搜到了blowfish加密的特征，对比了下加密源码，发现这里就是blowfish，key就是Shell
检测是否存在调试，但是由于被hook了，所以始终是1，也就是肯定会执行
sub_2D17A0是一个SM4，而且没有魔改过，Key为=‘IgTheShy’
sub_2D1400就是一个strcmp，我们可以把密文提取出来
0xE8, 0xB2, 0xBE, 0xC7, 0x24, 0x2A, 0x8C, 0xB1, 0x2B, 0x7A,
0xB8, 0x36, 0x17, 0x78, 0x34, 0x91, 0x7E, 0x52, 0x45, 0x2A,
0x6A, 0xFD, 0xE9, 0xE4, 0x94, 0xCD, 0x84, 0x7A, 0x79, 0xD5,
0x54, 0x1E贴一下脚本
blowfish.h
#pragma once
/*
使用BlowFish进行加解密
*/
//定义全局旧的pbox sbox 都是根据小数来的。
#define N 16
static const unsigned long ORIG_P[16 + 2] = {
0x243F6A88L, 0x85A308D3L, 0x13198A2EL, 0x03707344L,
0xA4093822L, 0x299F31D0L, 0x082EFA98L, 0xEC4E6C89L,
0x452821E6L, 0x38D01377L, 0xBE5466CFL, 0x34E90C6CL,
0xC0AC29B7L, 0xC97C50DDL, 0x3F84D5B5L, 0xB5470917L,
0x9216D5D9L, 0x8979FB1BL
};
static const unsigned long ORIG_S[4][256] = {
{ 0xD1310BA6L, 0x98DFB5ACL, 0x2FFD72DBL, 0xD01ADFB7L,
0xB8E1AFEDL, 0x6A267E96L, 0xBA7C9045L, 0xF12C7F99L,
0x24A19947L, 0xB3916CF7L, 0x0801F2E2L, 0x858EFC16L,
0x636920D8L, 0x71574E69L, 0xA458FEA3L, 0xF4933D7EL,
0x0D95748FL, 0x728EB658L, 0x718BCD58L, 0x82154AEEL,
0x7B54A41DL, 0xC25A59B5L, 0x9C30D539L, 0x2AF26013L,
0xC5D1B023L, 0x286085F0L, 0xCA417918L, 0xB8DB38EFL,
0x8E79DCB0L, 0x603A180EL, 0x6C9E0E8BL, 0xB01E8A3EL,
0xD71577C1L, 0xBD314B27L, 0x78AF2FDAL, 0x55605C60L,
0xE65525F3L, 0xAA55AB94L, 0x57489862L, 0x63E81440L,
0x55CA396AL, 0x2AAB10B6L, 0xB4CC5C34L, 0x1141E8CEL,
0xA15486AFL, 0x7C72E993L, 0xB3EE1411L, 0x636FBC2AL,
0x2BA9C55DL, 0x741831F6L, 0xCE5C3E16L, 0x9B87931EL,
0xAFD6BA33L, 0x6C24CF5CL, 0x7A325381L, 0x28958677L,
0x3B8F4898L, 0x6B4BB9AFL, 0xC4BFE81BL, 0x66282193L,
0x61D809CCL, 0xFB21A991L, 0x487CAC60L, 0x5DEC8032L,
0xEF845D5DL, 0xE98575B1L, 0xDC262302L, 0xEB651B88L,
0x23893E81L, 0xD396ACC5L, 0x0F6D6FF3L, 0x83F44239L,
0x2E0B4482L, 0xA4842004L, 0x69C8F04AL, 0x9E1F9B5EL,
0x21C66842L, 0xF6E96C9AL, 0x670C9C61L, 0xABD388F0L,
0x6A51A0D2L, 0xD8542F68L, 0x960FA728L, 0xAB5133A3L,
0x6EEF0B6CL, 0x137A3BE4L, 0xBA3BF050L, 0x7EFB2A98L,
0xA1F1651DL, 0x39AF0176L, 0x66CA593EL, 0x82430E88L,
0x8CEE8619L, 0x456F9FB4L, 0x7D84A5C3L, 0x3B8B5EBEL,
0xE06F75D8L, 0x85C12073L, 0x401A449FL, 0x56C16AA6L,
0x4ED3AA62L, 0x363F7706L, 0x1BFEDF72L, 0x429B023DL,
0x37D0D724L, 0xD00A1248L, 0xDB0FEAD3L, 0x49F1C09BL,
0x075372C9L, 0x80991B7BL, 0x25D479D8L, 0xF6E8DEF7L,
0xE3FE501AL, 0xB6794C3BL, 0x976CE0BDL, 0x04C006BAL,
0xC1A94FB6L, 0x409F60C4L, 0x5E5C9EC2L, 0x196A2463L,
0x68FB6FAFL, 0x3E6C53B5L, 0x1339B2EBL, 0x3B52EC6FL,
0x6DFC511FL, 0x9B30952CL, 0xCC814544L, 0xAF5EBD09L,
0xBEE3D004L, 0xDE334AFDL, 0x660F2807L, 0x192E4BB3L,
0xC0CBA857L, 0x45C8740FL, 0xD20B5F39L, 0xB9D3FBDBL,
0x5579C0BDL, 0x1A60320AL, 0xD6A100C6L, 0x402C7279L,
0x679F25FEL, 0xFB1FA3CCL, 0x8EA5E9F8L, 0xDB3222F8L,
0x3C7516DFL, 0xFD616B15L, 0x2F501EC8L, 0xAD0552ABL,
0x323DB5FAL, 0xFD238760L, 0x53317B48L, 0x3E00DF82L,
0x9E5C57BBL, 0xCA6F8CA0L, 0x1A87562EL, 0xDF1769DBL,
0xD542A8F6L, 0x287EFFC3L, 0xAC6732C6L, 0x8C4F5573L,
0x695B27B0L, 0xBBCA58C8L, 0xE1FFA35DL, 0xB8F011A0L,
0x10FA3D98L, 0xFD2183B8L, 0x4AFCB56CL, 0x2DD1D35BL,
0x9A53E479L, 0xB6F84565L, 0xD28E49BCL, 0x4BFB9790L,
0xE1DDF2DAL, 0xA4CB7E33L, 0x62FB1341L, 0xCEE4C6E8L,
0xEF20CADAL, 0x36774C01L, 0xD07E9EFEL, 0x2BF11FB4L,
0x95DBDA4DL, 0xAE909198L, 0xEAAD8E71L, 0x6B93D5A0L,
0xD08ED1D0L, 0xAFC725E0L, 0x8E3C5B2FL, 0x8E7594B7L,
0x8FF6E2FBL, 0xF2122B64L, 0x8888B812L, 0x900DF01CL,
0x4FAD5EA0L, 0x688FC31CL, 0xD1CFF191L, 0xB3A8C1ADL,
0x2F2F2218L, 0xBE0E1777L, 0xEA752DFEL, 0x8B021FA1L,
0xE5A0CC0FL, 0xB56F74E8L, 0x18ACF3D6L, 0xCE89E299L,
0xB4A84FE0L, 0xFD13E0B7L, 0x7CC43B81L, 0xD2ADA8D9L,
0x165FA266L, 0x80957705L, 0x93CC7314L, 0x211A1477L,
0xE6AD2065L, 0x77B5FA86L, 0xC75442F5L, 0xFB9D35CFL,
0xEBCDAF0CL, 0x7B3E89A0L, 0xD6411BD3L, 0xAE1E7E49L,
0x00250E2DL, 0x2071B35EL, 0x226800BBL, 0x57B8E0AFL,
0x2464369BL, 0xF009B91EL, 0x5563911DL, 0x59DFA6AAL,
0x78C14389L, 0xD95A537FL, 0x207D5BA2L, 0x02E5B9C5L,
0x83260376L, 0x6295CFA9L, 0x11C81968L, 0x4E734A41L,
0xB3472DCAL, 0x7B14A94AL, 0x1B510052L, 0x9A532915L,
0xD60F573FL, 0xBC9BC6E4L, 0x2B60A476L, 0x81E67400L,
0x08BA6FB5L, 0x571BE91FL, 0xF296EC6BL, 0x2A0DD915L,
0xB6636521L, 0xE7B9F9B6L, 0xFF34052EL, 0xC5855664L,
0x53B02D5DL, 0xA99F8FA1L, 0x08BA4799L, 0x6E85076AL },
{ 0x4B7A70E9L, 0xB5B32944L, 0xDB75092EL, 0xC4192623L,
0xAD6EA6B0L, 0x49A7DF7DL, 0x9CEE60B8L, 0x8FEDB266L,
0xECAA8C71L, 0x699A17FFL, 0x5664526CL, 0xC2B19EE1L,
0x193602A5L, 0x75094C29L, 0xA0591340L, 0xE4183A3EL,
0x3F54989AL, 0x5B429D65L, 0x6B8FE4D6L, 0x99F73FD6L,
0xA1D29C07L, 0xEFE830F5L, 0x4D2D38E6L, 0xF0255DC1L,
0x4CDD2086L, 0x8470EB26L, 0x6382E9C6L, 0x021ECC5EL,
0x09686B3FL, 0x3EBAEFC9L, 0x3C971814L, 0x6B6A70A1L,
0x687F3584L, 0x52A0E286L, 0xB79C5305L, 0xAA500737L,
0x3E07841CL, 0x7FDEAE5CL, 0x8E7D44ECL, 0x5716F2B8L,
0xB03ADA37L, 0xF0500C0DL, 0xF01C1F04L, 0x0200B3FFL,
0xAE0CF51AL, 0x3CB574B2L, 0x25837A58L, 0xDC0921BDL,
0xD19113F9L, 0x7CA92FF6L, 0x94324773L, 0x22F54701L,
0x3AE5E581L, 0x37C2DADCL, 0xC8B57634L, 0x9AF3DDA7L,
0xA9446146L, 0x0FD0030EL, 0xECC8C73EL, 0xA4751E41L,
0xE238CD99L, 0x3BEA0E2FL, 0x3280BBA1L, 0x183EB331L,
0x4E548B38L, 0x4F6DB908L, 0x6F420D03L, 0xF60A04BFL,
0x2CB81290L, 0x24977C79L, 0x5679B072L, 0xBCAF89AFL,
0xDE9A771FL, 0xD9930810L, 0xB38BAE12L, 0xDCCF3F2EL,
0x5512721FL, 0x2E6B7124L, 0x501ADDE6L, 0x9F84CD87L,
0x7A584718L, 0x7408DA17L, 0xBC9F9ABCL, 0xE94B7D8CL,
0xEC7AEC3AL, 0xDB851DFAL, 0x63094366L, 0xC464C3D2L,
0xEF1C1847L, 0x3215D908L, 0xDD433B37L, 0x24C2BA16L,
0x12A14D43L, 0x2A65C451L, 0x50940002L, 0x133AE4DDL,
0x71DFF89EL, 0x10314E55L, 0x81AC77D6L, 0x5F11199BL,
0x043556F1L, 0xD7A3C76BL, 0x3C11183BL, 0x5924A509L,
0xF28FE6EDL, 0x97F1FBFAL, 0x9EBABF2CL, 0x1E153C6EL,
0x86E34570L, 0xEAE96FB1L, 0x860E5E0AL, 0x5A3E2AB3L,
0x771FE71CL, 0x4E3D06FAL, 0x2965DCB9L, 0x99E71D0FL,
0x803E89D6L, 0x5266C825L, 0x2E4CC978L, 0x9C10B36AL,
0xC6150EBAL, 0x94E2EA78L, 0xA5FC3C53L, 0x1E0A2DF4L,
0xF2F74EA7L, 0x361D2B3DL, 0x1939260FL, 0x19C27960L,
0x5223A708L, 0xF71312B6L, 0xEBADFE6EL, 0xEAC31F66L,
0xE3BC4595L, 0xA67BC883L, 0xB17F37D1L, 0x018CFF28L,
0xC332DDEFL, 0xBE6C5AA5L, 0x65582185L, 0x68AB9802L,
0xEECEA50FL, 0xDB2F953BL, 0x2AEF7DADL, 0x5B6E2F84L,
0x1521B628L, 0x29076170L, 0xECDD4775L, 0x619F1510L,
0x13CCA830L, 0xEB61BD96L, 0x0334FE1EL, 0xAA0363CFL,
0xB5735C90L, 0x4C70A239L, 0xD59E9E0BL, 0xCBAADE14L,
0xEECC86BCL, 0x60622CA7L, 0x9CAB5CABL, 0xB2F3846EL,
0x648B1EAFL, 0x19BDF0CAL, 0xA02369B9L, 0x655ABB50L,
0x40685A32L, 0x3C2AB4B3L, 0x319EE9D5L, 0xC021B8F7L,
0x9B540B19L, 0x875FA099L, 0x95F7997EL, 0x623D7DA8L,
0xF837889AL, 0x97E32D77L, 0x11ED935FL, 0x16681281L,
0x0E358829L, 0xC7E61FD6L, 0x96DEDFA1L, 0x7858BA99L,
0x57F584A5L, 0x1B227263L, 0x9B83C3FFL, 0x1AC24696L,
0xCDB30AEBL, 0x532E3054L, 0x8FD948E4L, 0x6DBC3128L,
0x58EBF2EFL, 0x34C6FFEAL, 0xFE28ED61L, 0xEE7C3C73L,
0x5D4A14D9L, 0xE864B7E3L, 0x42105D14L, 0x203E13E0L,
0x45EEE2B6L, 0xA3AAABEAL, 0xDB6C4F15L, 0xFACB4FD0L,
0xC742F442L, 0xEF6ABBB5L, 0x654F3B1DL, 0x41CD2105L,
0xD81E799EL, 0x86854DC7L, 0xE44B476AL, 0x3D816250L,
0xCF62A1F2L, 0x5B8D2646L, 0xFC8883A0L, 0xC1C7B6A3L,
0x7F1524C3L, 0x69CB7492L, 0x47848A0BL, 0x5692B285L,
0x095BBF00L, 0xAD19489DL, 0x1462B174L, 0x23820E00L,
0x58428D2AL, 0x0C55F5EAL, 0x1DADF43EL, 0x233F7061L,
0x3372F092L, 0x8D937E41L, 0xD65FECF1L, 0x6C223BDBL,
0x7CDE3759L, 0xCBEE7460L, 0x4085F2A7L, 0xCE77326EL,
0xA6078084L, 0x19F8509EL, 0xE8EFD855L, 0x61D99735L,
0xA969A7AAL, 0xC50C06C2L, 0x5A04ABFCL, 0x800BCADCL,
0x9E447A2EL, 0xC3453484L, 0xFDD56705L, 0x0E1E9EC9L,
0xDB73DBD3L, 0x105588CDL, 0x675FDA79L, 0xE3674340L,
0xC5C43465L, 0x713E38D8L, 0x3D28F89EL, 0xF16DFF20L,
0x153E21E7L, 0x8FB03D4AL, 0xE6E39F2BL, 0xDB83ADF7L },
{ 0xE93D5A68L, 0x948140F7L, 0xF64C261CL, 0x94692934L,
0x411520F7L, 0x7602D4F7L, 0xBCF46B2EL, 0xD4A20068L,
0xD4082471L, 0x3320F46AL, 0x43B7D4B7L, 0x500061AFL,
0x1E39F62EL, 0x97244546L, 0x14214F74L, 0xBF8B8840L,
0x4D95FC1DL, 0x96B591AFL, 0x70F4DDD3L, 0x66A02F45L,
0xBFBC09ECL, 0x03BD9785L, 0x7FAC6DD0L, 0x31CB8504L,
0x96EB27B3L, 0x55FD3941L, 0xDA2547E6L, 0xABCA0A9AL,
0x28507825L, 0x530429F4L, 0x0A2C86DAL, 0xE9B66DFBL,
0x68DC1462L, 0xD7486900L, 0x680EC0A4L, 0x27A18DEEL,
0x4F3FFEA2L, 0xE887AD8CL, 0xB58CE006L, 0x7AF4D6B6L,
0xAACE1E7CL, 0xD3375FECL, 0xCE78A399L, 0x406B2A42L,
0x20FE9E35L, 0xD9F385B9L, 0xEE39D7ABL, 0x3B124E8BL,
0x1DC9FAF7L, 0x4B6D1856L, 0x26A36631L, 0xEAE397B2L,
0x3A6EFA74L, 0xDD5B4332L, 0x6841E7F7L, 0xCA7820FBL,
0xFB0AF54EL, 0xD8FEB397L, 0x454056ACL, 0xBA489527L,
0x55533A3AL, 0x20838D87L, 0xFE6BA9B7L, 0xD096954BL,
0x55A867BCL, 0xA1159A58L, 0xCCA92963L, 0x99E1DB33L,
0xA62A4A56L, 0x3F3125F9L, 0x5EF47E1CL, 0x9029317CL,
0xFDF8E802L, 0x04272F70L, 0x80BB155CL, 0x05282CE3L,
0x95C11548L, 0xE4C66D22L, 0x48C1133FL, 0xC70F86DCL,
0x07F9C9EEL, 0x41041F0FL, 0x404779A4L, 0x5D886E17L,
0x325F51EBL, 0xD59BC0D1L, 0xF2BCC18FL, 0x41113564L,
0x257B7834L, 0x602A9C60L, 0xDFF8E8A3L, 0x1F636C1BL,
0x0E12B4C2L, 0x02E1329EL, 0xAF664FD1L, 0xCAD18115L,
0x6B2395E0L, 0x333E92E1L, 0x3B240B62L, 0xEEBEB922L,
0x85B2A20EL, 0xE6BA0D99L, 0xDE720C8CL, 0x2DA2F728L,
0xD0127845L, 0x95B794FDL, 0x647D0862L, 0xE7CCF5F0L,
0x5449A36FL, 0x877D48FAL, 0xC39DFD27L, 0xF33E8D1EL,
0x0A476341L, 0x992EFF74L, 0x3A6F6EABL, 0xF4F8FD37L,
0xA812DC60L, 0xA1EBDDF8L, 0x991BE14CL, 0xDB6E6B0DL,
0xC67B5510L, 0x6D672C37L, 0x2765D43BL, 0xDCD0E804L,
0xF1290DC7L, 0xCC00FFA3L, 0xB5390F92L, 0x690FED0BL,
0x667B9FFBL, 0xCEDB7D9CL, 0xA091CF0BL, 0xD9155EA3L,
0xBB132F88L, 0x515BAD24L, 0x7B9479BFL, 0x763BD6EBL,
0x37392EB3L, 0xCC115979L, 0x8026E297L, 0xF42E312DL,
0x6842ADA7L, 0xC66A2B3BL, 0x12754CCCL, 0x782EF11CL,
0x6A124237L, 0xB79251E7L, 0x06A1BBE6L, 0x4BFB6350L,
0x1A6B1018L, 0x11CAEDFAL, 0x3D25BDD8L, 0xE2E1C3C9L,
0x44421659L, 0x0A121386L, 0xD90CEC6EL, 0xD5ABEA2AL,
0x64AF674EL, 0xDA86A85FL, 0xBEBFE988L, 0x64E4C3FEL,
0x9DBC8057L, 0xF0F7C086L, 0x60787BF8L, 0x6003604DL,
0xD1FD8346L, 0xF6381FB0L, 0x7745AE04L, 0xD736FCCCL,
0x83426B33L, 0xF01EAB71L, 0xB0804187L, 0x3C005E5FL,
0x77A057BEL, 0xBDE8AE24L, 0x55464299L, 0xBF582E61L,
0x4E58F48FL, 0xF2DDFDA2L, 0xF474EF38L, 0x8789BDC2L,
0x5366F9C3L, 0xC8B38E74L, 0xB475F255L, 0x46FCD9B9L,
0x7AEB2661L, 0x8B1DDF84L, 0x846A0E79L, 0x915F95E2L,
0x466E598EL, 0x20B45770L, 0x8CD55591L, 0xC902DE4CL,
0xB90BACE1L, 0xBB8205D0L, 0x11A86248L, 0x7574A99EL,
0xB77F19B6L, 0xE0A9DC09L, 0x662D09A1L, 0xC4324633L,
0xE85A1F02L, 0x09F0BE8CL, 0x4A99A025L, 0x1D6EFE10L,
0x1AB93D1DL, 0x0BA5A4DFL, 0xA186F20FL, 0x2868F169L,
0xDCB7DA83L, 0x573906FEL, 0xA1E2CE9BL, 0x4FCD7F52L,
0x50115E01L, 0xA70683FAL, 0xA002B5C4L, 0x0DE6D027L,
0x9AF88C27L, 0x773F8641L, 0xC3604C06L, 0x61A806B5L,
0xF0177A28L, 0xC0F586E0L, 0x006058AAL, 0x30DC7D62L,
0x11E69ED7L, 0x2338EA63L, 0x53C2DD94L, 0xC2C21634L,
0xBBCBEE56L, 0x90BCB6DEL, 0xEBFC7DA1L, 0xCE591D76L,
0x6F05E409L, 0x4B7C0188L, 0x39720A3DL, 0x7C927C24L,
0x86E3725FL, 0x724D9DB9L, 0x1AC15BB4L, 0xD39EB8FCL,
0xED545578L, 0x08FCA5B5L, 0xD83D7CD3L, 0x4DAD0FC4L,
0x1E50EF5EL, 0xB161E6F8L, 0xA28514D9L, 0x6C51133CL,
0x6FD5C7E7L, 0x56E14EC4L, 0x362ABFCEL, 0xDDC6C837L,
0xD79A3234L, 0x92638212L, 0x670EFA8EL, 0x406000E0L },
{ 0x3A39CE37L, 0xD3FAF5CFL, 0xABC27737L, 0x5AC52D1BL,
0x5CB0679EL, 0x4FA33742L, 0xD3822740L, 0x99BC9BBEL,
0xD5118E9DL, 0xBF0F7315L, 0xD62D1C7EL, 0xC700C47BL,
0xB78C1B6BL, 0x21A19045L, 0xB26EB1BEL, 0x6A366EB4L,
0x5748AB2FL, 0xBC946E79L, 0xC6A376D2L, 0x6549C2C8L,
0x530FF8EEL, 0x468DDE7DL, 0xD5730A1DL, 0x4CD04DC6L,
0x2939BBDBL, 0xA9BA4650L, 0xAC9526E8L, 0xBE5EE304L,
0xA1FAD5F0L, 0x6A2D519AL, 0x63EF8CE2L, 0x9A86EE22L,
0xC089C2B8L, 0x43242EF6L, 0xA51E03AAL, 0x9CF2D0A4L,
0x83C061BAL, 0x9BE96A4DL, 0x8FE51550L, 0xBA645BD6L,
0x2826A2F9L, 0xA73A3AE1L, 0x4BA99586L, 0xEF5562E9L,
0xC72FEFD3L, 0xF752F7DAL, 0x3F046F69L, 0x77FA0A59L,
0x80E4A915L, 0x87B08601L, 0x9B09E6ADL, 0x3B3EE593L,
0xE990FD5AL, 0x9E34D797L, 0x2CF0B7D9L, 0x022B8B51L,
0x96D5AC3AL, 0x017DA67DL, 0xD1CF3ED6L, 0x7C7D2D28L,
0x1F9F25CFL, 0xADF2B89BL, 0x5AD6B472L, 0x5A88F54CL,
0xE029AC71L, 0xE019A5E6L, 0x47B0ACFDL, 0xED93FA9BL,
0xE8D3C48DL, 0x283B57CCL, 0xF8D56629L, 0x79132E28L,
0x785F0191L, 0xED756055L, 0xF7960E44L, 0xE3D35E8CL,
0x15056DD4L, 0x88F46DBAL, 0x03A16125L, 0x0564F0BDL,
0xC3EB9E15L, 0x3C9057A2L, 0x97271AECL, 0xA93A072AL,
0x1B3F6D9BL, 0x1E6321F5L, 0xF59C66FBL, 0x26DCF319L,
0x7533D928L, 0xB155FDF5L, 0x03563482L, 0x8ABA3CBBL,
0x28517711L, 0xC20AD9F8L, 0xABCC5167L, 0xCCAD925FL,
0x4DE81751L, 0x3830DC8EL, 0x379D5862L, 0x9320F991L,
0xEA7A90C2L, 0xFB3E7BCEL, 0x5121CE64L, 0x774FBE32L,
0xA8B6E37EL, 0xC3293D46L, 0x48DE5369L, 0x6413E680L,
0xA2AE0810L, 0xDD6DB224L, 0x69852DFDL, 0x09072166L,
0xB39A460AL, 0x6445C0DDL, 0x586CDECFL, 0x1C20C8AEL,
0x5BBEF7DDL, 0x1B588D40L, 0xCCD2017FL, 0x6BB4E3BBL,
0xDDA26A7EL, 0x3A59FF45L, 0x3E350A44L, 0xBCB4CDD5L,
0x72EACEA8L, 0xFA6484BBL, 0x8D6612AEL, 0xBF3C6F47L,
0xD29BE463L, 0x542F5D9EL, 0xAEC2771BL, 0xF64E6370L,
0x740E0D8DL, 0xE75B1357L, 0xF8721671L, 0xAF537D5DL,
0x4040CB08L, 0x4EB4E2CCL, 0x34D2466AL, 0x0115AF84L,
0xE1B00428L, 0x95983A1DL, 0x06B89FB4L, 0xCE6EA048L,
0x6F3F3B82L, 0x3520AB82L, 0x011A1D4BL, 0x277227F8L,
0x611560B1L, 0xE7933FDCL, 0xBB3A792BL, 0x344525BDL,
0xA08839E1L, 0x51CE794BL, 0x2F32C9B7L, 0xA01FBAC9L,
0xE01CC87EL, 0xBCC7D1F6L, 0xCF0111C3L, 0xA1E8AAC7L,
0x1A908749L, 0xD44FBD9AL, 0xD0DADECBL, 0xD50ADA38L,
0x0339C32AL, 0xC6913667L, 0x8DF9317CL, 0xE0B12B4FL,
0xF79E59B7L, 0x43F5BB3AL, 0xF2D519FFL, 0x27D9459CL,
0xBF97222CL, 0x15E6FC2AL, 0x0F91FC71L, 0x9B941525L,
0xFAE59361L, 0xCEB69CEBL, 0xC2A86459L, 0x12BAA8D1L,
0xB6C1075EL, 0xE3056A0CL, 0x10D25065L, 0xCB03A442L,
0xE0EC6E0EL, 0x1698DB3BL, 0x4C98A0BEL, 0x3278E964L,
0x9F1F9532L, 0xE0D392DFL, 0xD3A0342BL, 0x8971F21EL,
0x1B0A7441L, 0x4BA3348CL, 0xC5BE7120L, 0xC37632D8L,
0xDF359F8DL, 0x9B992F2EL, 0xE60B6F47L, 0x0FE3F11DL,
0xE54CDA54L, 0x1EDAD891L, 0xCE6279CFL, 0xCD3E7E6FL,
0x1618B166L, 0xFD2C1D05L, 0x848FD2C5L, 0xF6FB2299L,
0xF523F357L, 0xA6327623L, 0x93A83531L, 0x56CCCD02L,
0xACF08162L, 0x5A75EBB5L, 0x6E163697L, 0x88D273CCL,
0xDE966292L, 0x81B949D0L, 0x4C50901BL, 0x71C65614L,
0xE6C6C7BDL, 0x327A140AL, 0x45E1D006L, 0xC3F27B9AL,
0xC9AA53FDL, 0x62A80F00L, 0xBB25BFE2L, 0x35BDD2F6L,
0x71126905L, 0xB2040222L, 0xB6CBCF7CL, 0xCD769C2BL,
0x53113EC0L, 0x1640E3D3L, 0x38ABBD60L, 0x2547ADF0L,
0xBA38209CL, 0xF746CE76L, 0x77AFA1C5L, 0x20756060L,
0x85CBFE4EL, 0x8AE88DD8L, 0x7AAAF9B0L, 0x4CF9AA7EL,
0x1948C25CL, 0x02FB8A8CL, 0x01C36AE4L, 0xD6EBE1F9L,
0x90D4F869L, 0xA65CDEA0L, 0x3F09252DL, 0xC208E69FL,
0xB74E6132L, 0xCE77E25BL, 0x578FDFE3L, 0x3AC372E6L }
};
#define N 16
//定义初始化需要用到的加密结构
typedef struct _BLOWFISH_CTX
{
//定义初始化的pbox 以及 sbox 在程序中进行初始化
unsigned int pbox[N + 2]; //总共18
unsigned int sbox[4][256];
}BLOWFISH_CTX, * PBLOWFISH_CTX;
/*
初始化函数 此函数功能如下
1.接受key 与 keylen参数（当然keylen）可以自己计算
2.初始化sbox 将全局的sbox的内容复制到CTX中的sbox中
3.初始化pbox pbox的初始化方法如下
1.迭代18论。然后每一轮都设置CTX的pbox
2.CTX.pbox需要使用全局pbox ^ data
3.data是一个四字节整数。其中存储的就是key的四个字节。
key = "12345678abc"
每一轮中 data = "1234"
data = "5678"
data = "abc1" //注意这里当超出keylen的时候。 data获取的key要从0开始
。。。。
*/
bool BlowFishInit(BLOWFISH_CTX* blowCtx, unsigned char* key, unsigned int keylen);
/*
F函数
F函数是将一个32位数分别进行拆分。 拆分为四组。 每一组都作为sbox的索引值
然后进行下列运算
(（s1[a] + s2[b]) ^ s3[c]) + s4[d]
在编程中sbox是数组是从零开始。 所以s1 对应s[0] s2对应s[1]
在编程中总结下公式：
temap = s[0][a] + s[1][b]
teamp = temp ^ s[2][c]'
temp = temp + s[3][d]
简单的记住就是 ((a+b) ^ c)+d;
当然每个都对应下标为 0 1 2 3 s[0][a] s[1][b] s[2][c] s[3][d]
最后返回结果值 return temp
*/
static unsigned long F(BLOWFISH_CTX* ctx, unsigned long x);
//signed int F(PBLOWFISH_CTX blowCtx,unsigned int Data);
/*
加密函数：
首次用在初始化中是对一个64位0进行加密。
一次加密八个字节
核心思想为 加密左边与右边数据
左边数据直接 ^ PBOX
右边数据 = 右边数据 ^ f(左边数据）
然后进行交换。
以上是16轮的交换
剩下一轮则是
左边 = 左边^PBOX[N+1]
右边 = 右边^pbox[N]
最后设置相关数值
*/
void BlowFish_Encry(PBLOWFISH_CTX blowCtx, unsigned int* left, unsigned int* right);
/*
跟加密一样。只不过结果相反步骤如下：
首先遍历从最后一轮开始逐次递减
最后一轮数据 右边= 右边^PBOX[1] 左边数据 = 左边数据 ^pbox[0]
*/
void BlowFish_Decrypt(PBLOWFISH_CTX blowCtx, unsigned int* left, unsigned int* right);主函数（包含rc4和twofish）
#include "blowfish.h"
#include <string>
using namespace std;
bool BlowFishInit(BLOWFISH_CTX* blowCtx, unsigned char* key, unsigned int keylen)
{
//设置传入的CTX中的SBOX值
for (int Row = 0; Row < 4; Row++)
{
for (int Col = 0; Col < 256; Col++)
{
blowCtx->sbox[Row][Col] = ORIG_S[Row][Col];
}
}
/*
设置pbox
1.循环18轮
2.每轮都设置ctx.pbox值与data ^
3.data = *(DWORD*)key[0] key[1].....
*/
int KeyIndex = 0;
for (int index = 0; index < N + 2; index++)
{
unsigned int data = 0;
//填充data 将key的字符设置到data当中
for (int k = 0; k < 4; k++)
{
//通过移位设置每个字符
data = (data << 8) | key[KeyIndex];
KeyIndex++;
//如果超出了key长度 那么key要从开始
if (KeyIndex >= keylen)
KeyIndex = 0;
}
//否则不满足
blowCtx->pbox[index] = ORIG_P[index] ^ data;
}
//对一个64位0 进行加密。加密结果的输出设置到pbox[i]与pbox[i+1]中
unsigned int Data1 = 0;
unsigned int Data2 = 0;
for (int i = 0; i < N + 2; i += 2)
{
BlowFish_Encry(blowCtx, &Data1, &Data2);
blowCtx->pbox[i] = Data1;
blowCtx->pbox[i + 1] = Data2;
}
//初始化Sbox
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 256; j += 2)
{
BlowFish_Encry(blowCtx, &Data1, &Data2);
blowCtx->sbox[i][j] = Data1;
blowCtx->sbox[i][j + 1] = Data2;
}
}
return true;
}
//unsigned int F(PBLOWFISH_CTX blowCtx, unsigned int Data)
//{
//
// unsigned int a, b, c, d;
// /*
// 利用位运算 取出下标值
// */
//
// a = (Data >> 24) & 0xFF;
// b = (Data >> 16) & 0xFF;
// c = (Data >> 8) & 0xFf;
// d = Data & 0xFF;
//
//
// int TempValue = blowCtx->sbox[0][a] + blowCtx->sbox[1][b];
// TempValue = TempValue ^ blowCtx->sbox[2][c];
// TempValue = TempValue + blowCtx->sbox[3][d];
// //公式 ((a+b)^c)+d
// return TempValue;
//}
static unsigned long F(BLOWFISH_CTX* ctx, unsigned long x) {
unsigned short a, b, c, d;
unsigned long y;
/* d = (unsigned short)(x & 0xFF);
x >>= 8;
c = (unsigned short)(x & 0xFF);
x >>= 8;
b = (unsigned short)(x & 0xFF);
x >>= 8;
a = (unsigned short)(x & 0xFF);
//都可以使用
*/
a = (x >> 24) & 0xFF;
b = (x >> 16) & 0xFF;
c = (x >> 8) & 0xFf;
d = x & 0xFF;
y = ctx->sbox[0][a] + ctx->sbox[1][b];
y = y ^ ctx->sbox[2][c];
y = y + ctx->sbox[3][d];
return y;
}
void BlowFish_Encry(PBLOWFISH_CTX blowCtx, unsigned int* left, unsigned int* right)
{
unsigned long Xl;
unsigned long Xr;
unsigned long temp;
short i;
//加密部分首先将其分为left跟right两组。 每一组分别32位
Xl = *left;
Xr = *right;
for (i = 0; i < N; ++i) {
Xl = Xl ^ blowCtx->pbox[i];
Xr = F(blowCtx, Xl) ^ Xr;
temp = Xl;
Xl = Xr; //交换左右的值。 l = R r= l 继续下一轮循环。总共16轮
Xr = temp;
}
temp = Xl;
Xl = Xr; //16轮完毕之后交换变量
Xr = temp;
Xr = Xr ^ blowCtx->pbox[N]; //最后进行一次疑或
Xl = Xl ^ blowCtx->pbox[N + 1];
*left = Xl;
*right = Xr;
}
void BlowFish_Decrypt(PBLOWFISH_CTX blowCtx, unsigned int* left, unsigned int* right)
{
unsigned int Xl = *left;
unsigned int Xr = *right;
//倒着循环
for (int i = N + 1; i > 1; --i)
{
Xl = Xl ^ blowCtx->pbox[i];
Xr = Xr ^ F(blowCtx, Xl);
//继续左右交换
unsigned int temp = Xl;
Xl = Xr;
Xr = temp;
}
//最后一轮继续交换
unsigned int temp = Xl;
Xl = Xr;
Xr = temp;
//返还原
Xr = Xr ^ blowCtx->pbox[1];
Xl = Xl ^ blowCtx->pbox[0];
//设置变量返回
*left = Xl;
*right = Xr;
}
void rc4_init(unsigned char* s, unsigned char* key, unsigned long Len_k) //初始化函数
{
int i = 0, j = 0;
char k[256] = { 0 };
unsigned char tmp = 0;
for (i = 0; i < 256; i++) {
s[i] = i;
k[i] = key[i % Len_k];
}
for (i = 0; i < 256; i++) {
j = (j + s[i] + k[i]) % 256;
tmp = s[i];
s[i] = s[j]; //交换s[i]和s[j]
s[j] = tmp;
}
}
/*
RC4加解密函数
unsigned char* Data 加解密的数据
unsigned long Len_D 加解密数据的长度
unsigned char* key 密钥
unsigned long Len_k 密钥长度
*/
void rc4_crypt(unsigned char* Data, unsigned long Len_D, unsigned char* key, unsigned long Len_k) //加解密
{
unsigned char s[256];
rc4_init(s, key, Len_k);
int i = 0, j = 0, t = 0;
unsigned long k = 0;
unsigned char tmp;
for (k = 0; k < Len_D; k++) {
i = (i + 1) % 256;
j = (j + s[i]) % 256;
tmp = s[i];
s[i] = s[j]; //交换s[x]和s[y]
s[j] = tmp;
t = (s[i] + s[j]) % 256;
Data[k] ^= s[t];
}
}
int main()
{
unsigned char data[] = { 0xE8, 0xB2, 0xBE, 0xC7, 0x24, 0x2A, 0x8C, 0xB1, 0x2B, 0x7A,0xB8, 0x36, 0x17, 0x78, 0x34, 0x91, 0x7E, 0x52, 0x45, 0x2A,
0x6A, 0xFD, 0xE9, 0xE4, 0x94, 0xCD, 0x84, 0x7A, 0x79, 0xD5,0x54, 0x1E };
unsigned char* key = (unsigned char*)"IgTheShy";
rc4_crypt(data, strlen((const char*)data), key, strlen((const char* )key));
for (size_t i = 0; i < strlen((const char*)data); i++)
{
data[i] = data[i] ^i;
}
//小端序把密文拿出来
int a[] = { 0x9e316283,0x4d1e7b82,0x877602a3,0xa5b24d06,0x18369bcf,0xbc52cb43,0x1e14b9dd,0xf6d3cb95 };
BLOWFISH_CTX ctx;
BlowFishInit(&ctx, (unsigned char*)"Shell", strlen("Shell"));
for (size_t i = 0; i < 4; i++)
{
unsigned int L = a[i*2], R = a[2*i+1];
BlowFish_Decrypt(&ctx, &L, &R);
printf("%c%c%c%c", *((char*)&L + 0), *((char*)&L + 1), *((char*)&L + 2), *((char*)&L + 3));
printf("%c%c%c%c", *((char*)&R + 0), *((char*)&R + 1), *((char*)&R + 2), *((char*)&R + 3));
}
system("pause");
}转载请注明来源，欢迎对文章中的引用来源进行考证，欢迎指出任何有错误或不够清晰的表达。可以在下面评论区评论，也可以邮件至 767778848@qq.com