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【C】一个简单的字符串加密程序

作者:萝卜大爱兔斯基 / 发布于2013/3/1/ 721

一个简单的字符串加密程序


	#include <stdio.h>
	#include <string.h>

	#define LODWORD(_qw) ((unsigned long)(_qw))
	#define HIDWORD(_qw) ((unsigned long)(((_qw) >> 32) & 0xffffffff))

	char *pkey = "www.oschina.net";
	char *keymap = "abcdefghijklmnopqrstuvwxyz";

	void encrypt(char *username, char *key)
	{
	int i;
	unsigned __int64 v6;
	unsigned __int64 tmp;
	int nameLen = strlen(username);
	for ( i = 0; i != nameLen; ++i )
	{
	 tmp = (keymap[i] * username[i] ^ 0x28FC) & 0xFFFFFFF;
	 v6 = LODWORD(tmp);
	 tmp = (unsigned int)keymap[i] * (unsigned __int64)(unsigned int)username[i] >> 32;
	 v6 += HIDWORD(tmp);
	 key[i] = pkey[v6 % 0xF];
	 key[i + 1] = 0;
	}
	}


	int main(int argc, char* argv[])
	{
	char *name = "luobotou";
	char key[64] = {0};
	encrypt(name, key);
	printf("name:%s\nkey:%s \n", name, key);
	getchar();
	return 0;
	}

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　加密程序　

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