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three-rotor cipher machine.c
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three-rotor cipher machine.c
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//copyright(c) Tricia.2017
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
//三转轮密码机加密函数
void EncryptFile (char buffer[], int FileSize)
{
int i, j, m;
int flag = -1, num = 0;
int sRotor[26][2];
int mRotor[26][2];
int fRotor[26][2];
int arr[1][2];
sRotor[0][0] = 24; sRotor[0][1] = 21;
sRotor[1][0] = 25; sRotor[1][1] = 3;
sRotor[2][0] = 26; sRotor[2][1] = 15;
sRotor[3][0] = 1; sRotor[3][1] = 1;
sRotor[4][0] = 2; sRotor[4][1] = 19;
sRotor[5][0] = 3; sRotor[5][1] = 10;
sRotor[6][0] = 4; sRotor[6][1] = 14;
sRotor[7][0] = 5; sRotor[7][1] = 26;
sRotor[8][0] = 6; sRotor[8][1] = 20;
sRotor[9][0] = 7; sRotor[9][1] = 8;
sRotor[10][0] = 8; sRotor[10][1] = 16;
sRotor[11][0] = 9; sRotor[11][1] = 7;
sRotor[12][0] = 10; sRotor[12][1] = 22;
sRotor[13][0] = 11; sRotor[13][1] = 4;
sRotor[14][0] = 12; sRotor[14][1] = 11;
sRotor[15][0] = 13; sRotor[15][1] = 5;
sRotor[16][0] = 14; sRotor[16][1] = 17;
sRotor[17][0] = 15; sRotor[17][1] = 9;
sRotor[18][0] = 16; sRotor[18][1] = 12;
sRotor[19][0] = 17; sRotor[19][1] = 23;
sRotor[20][0] = 18; sRotor[20][1] = 18;
sRotor[21][0] = 19; sRotor[21][1] = 2;
sRotor[22][0] = 20; sRotor[22][1] = 25;
sRotor[23][0] = 21; sRotor[23][1] = 6;
sRotor[24][0] = 22; sRotor[24][1] = 24;
sRotor[25][0] = 23; sRotor[25][1] = 13;
mRotor[0][0] = 26; mRotor[0][1] = 20;
mRotor[1][0] = 1; mRotor[1][1] = 1;
mRotor[2][0] = 2; mRotor[2][1] = 6;
mRotor[3][0] = 3; mRotor[3][1] = 4;
mRotor[4][0] = 4; mRotor[4][1] = 15;
mRotor[5][0] = 5; mRotor[5][1] = 3;
mRotor[6][0] = 6; mRotor[6][1] = 14;
mRotor[7][0] = 7; mRotor[7][1] = 12;
mRotor[8][0] = 8; mRotor[8][1] = 23;
mRotor[9][0] = 9; mRotor[9][1] = 5;
mRotor[10][0] = 10; mRotor[10][1] = 16;
mRotor[11][0] = 11; mRotor[11][1] = 2;
mRotor[12][0] = 12; mRotor[12][1] = 22;
mRotor[13][0] = 13; mRotor[13][1] = 19;
mRotor[14][0] = 14; mRotor[14][1] = 11;
mRotor[15][0] = 15; mRotor[15][1] = 18;
mRotor[16][0] = 16; mRotor[16][1] = 25;
mRotor[17][0] = 17; mRotor[17][1] = 24;
mRotor[18][0] = 18; mRotor[18][1] = 13;
mRotor[19][0] = 19; mRotor[19][1] = 7;
mRotor[20][0] = 20; mRotor[20][1] = 10;
mRotor[21][0] = 21; mRotor[21][1] = 8;
mRotor[22][0] = 22; mRotor[22][1] = 21;
mRotor[23][0] = 23; mRotor[23][1] = 9;
mRotor[24][0] = 24; mRotor[24][1] = 26;
mRotor[25][0] = 25; mRotor[25][1] = 17;
fRotor[0][0] = 1; fRotor[0][1] = 8;
fRotor[1][0] = 2; fRotor[1][1] = 18;
fRotor[2][0] = 3; fRotor[2][1] = 26;
fRotor[3][0] = 4; fRotor[3][1] = 17;
fRotor[4][0] = 5; fRotor[4][1] = 20;
fRotor[5][0] = 6; fRotor[5][1] = 22;
fRotor[6][0] = 7; fRotor[6][1] = 10;
fRotor[7][0] = 8; fRotor[7][1] = 3;
fRotor[8][0] = 9; fRotor[8][1] = 13;
fRotor[9][0] = 10; fRotor[9][1] = 11;
fRotor[10][0] = 11; fRotor[10][1] = 4;
fRotor[11][0] = 12; fRotor[11][1] = 23;
fRotor[12][0] = 13; fRotor[12][1] = 5;
fRotor[13][0] = 14; fRotor[13][1] = 24;
fRotor[14][0] = 15; fRotor[14][1] = 9;
fRotor[15][0] = 16; fRotor[15][1] = 12;
fRotor[16][0] = 17; fRotor[16][1] = 25;
fRotor[17][0] = 18; fRotor[17][1] = 16;
fRotor[18][0] = 19; fRotor[18][1] = 19;
fRotor[19][0] = 20; fRotor[19][1] = 6;
fRotor[20][0] = 21; fRotor[20][1] = 15;
fRotor[21][0] = 22; fRotor[21][1] = 21;
fRotor[22][0] = 23; fRotor[22][1] = 2;
fRotor[23][0] = 24; fRotor[23][1] = 7;
fRotor[24][0] = 25; fRotor[24][1] = 1;
fRotor[25][0] = 26; fRotor[25][1] = 14;
for (i = 0; i < FileSize; i++) { //将文档所有A~Z的字母转为1~26的数字表示
if (buffer[i] >= 'A' && buffer[i] <= 'Z') {
buffer[i] -= 64;
}
else if (buffer[i] >= 'a' && buffer[i] <= 'z') {
buffer[i] -= 96;
}
}
for (i = 0; i < FileSize; i++) { //明密文转换
num++; //记录加密次数
if (buffer[i] >= 1 && buffer[i] <= 26) {
m = sRotor[buffer[i] - 1][0];
for (j = 0; j < 26; j++) {
flag++;
if (sRotor[j][1] == m) {
m = sRotor[j][1];
break;
}
}
m = mRotor[flag][0];
flag = -1;
for (j = 0; j < 26; j++) {
flag++;
if (mRotor[j][1] == m) {
m = mRotor[j][1];
break;
}
}
m = fRotor[flag][0];
flag = -1;
for (j = 0; j < 26; j++) {
flag++;
if (fRotor[j][1] == m) {
m = fRotor[j][1];
break;
}
}
buffer[i] = flag + 49 + '0'; //密文输出为字母
flag = -1; //flag回到初始值
arr[0][0] = fRotor[25][0]; //快轮转动一个位置
arr[0][1] = fRotor[25][1];
for (j = 25; j > 0; j--) {
fRotor[j][0] = fRotor[j - 1][0];
fRotor[j][1] = fRotor[j - 1][1];
}
fRotor[0][0] = arr[0][0];
fRotor[0][1] = arr[0][1];
if (num % 26 == 0) { //若快轮已转动一圈则中轮转动一个位置
arr[0][0] = mRotor[25][0]; //中轮转动一个位置
arr[0][1] = mRotor[25][1];
for (j = 25; j > 0; j--) {
mRotor[j][0] = mRotor[j - 1][0];
mRotor[j][1] = mRotor[j - 1][1];
}
mRotor[0][0] = arr[0][0];
mRotor[0][1] = arr[0][1];
}
if (num % (26 * 26) == 0) { //若中轮已转动一圈则慢轮转动一个位置
arr[0][0] = sRotor[25][0]; //慢轮转动一个位置
arr[0][1] = sRotor[25][1];
for (j = 25; j > 0; j--) {
sRotor[j][0] = sRotor[j - 1][0];
sRotor[j][1] = sRotor[j - 1][1];
}
sRotor[0][0] = arr[0][0];
sRotor[0][1] = arr[0][1];
}
}
}
buffer[FileSize] = '\0';
}
//三转轮密码机解密函数
void DecryptFile (char buffer[], int FileSize) {
int i, j, m;
int flag = -1, num = 0;
int sRotor[26][2];
int mRotor[26][2];
int fRotor[26][2];
int arr[1][2];
sRotor[0][0] = 24; sRotor[0][1] = 21;
sRotor[1][0] = 25; sRotor[1][1] = 3;
sRotor[2][0] = 26; sRotor[2][1] = 15;
sRotor[3][0] = 1; sRotor[3][1] = 1;
sRotor[4][0] = 2; sRotor[4][1] = 19;
sRotor[5][0] = 3; sRotor[5][1] = 10;
sRotor[6][0] = 4; sRotor[6][1] = 14;
sRotor[7][0] = 5; sRotor[7][1] = 26;
sRotor[8][0] = 6; sRotor[8][1] = 20;
sRotor[9][0] = 7; sRotor[9][1] = 8;
sRotor[10][0] = 8; sRotor[10][1] = 16;
sRotor[11][0] = 9; sRotor[11][1] = 7;
sRotor[12][0] = 10; sRotor[12][1] = 22;
sRotor[13][0] = 11; sRotor[13][1] = 4;
sRotor[14][0] = 12; sRotor[14][1] = 11;
sRotor[15][0] = 13; sRotor[15][1] = 5;
sRotor[16][0] = 14; sRotor[16][1] = 17;
sRotor[17][0] = 15; sRotor[17][1] = 9;
sRotor[18][0] = 16; sRotor[18][1] = 12;
sRotor[19][0] = 17; sRotor[19][1] = 23;
sRotor[20][0] = 18; sRotor[20][1] = 18;
sRotor[21][0] = 19; sRotor[21][1] = 2;
sRotor[22][0] = 20; sRotor[22][1] = 25;
sRotor[23][0] = 21; sRotor[23][1] = 6;
sRotor[24][0] = 22; sRotor[24][1] = 24;
sRotor[25][0] = 23; sRotor[25][1] = 13;
mRotor[0][0] = 26; mRotor[0][1] = 20;
mRotor[1][0] = 1; mRotor[1][1] = 1;
mRotor[2][0] = 2; mRotor[2][1] = 6;
mRotor[3][0] = 3; mRotor[3][1] = 4;
mRotor[4][0] = 4; mRotor[4][1] = 15;
mRotor[5][0] = 5; mRotor[5][1] = 3;
mRotor[6][0] = 6; mRotor[6][1] = 14;
mRotor[7][0] = 7; mRotor[7][1] = 12;
mRotor[8][0] = 8; mRotor[8][1] = 23;
mRotor[9][0] = 9; mRotor[9][1] = 5;
mRotor[10][0] = 10; mRotor[10][1] = 16;
mRotor[11][0] = 11; mRotor[11][1] = 2;
mRotor[12][0] = 12; mRotor[12][1] = 22;
mRotor[13][0] = 13; mRotor[13][1] = 19;
mRotor[14][0] = 14; mRotor[14][1] = 11;
mRotor[15][0] = 15; mRotor[15][1] = 18;
mRotor[16][0] = 16; mRotor[16][1] = 25;
mRotor[17][0] = 17; mRotor[17][1] = 24;
mRotor[18][0] = 18; mRotor[18][1] = 13;
mRotor[19][0] = 19; mRotor[19][1] = 7;
mRotor[20][0] = 20; mRotor[20][1] = 10;
mRotor[21][0] = 21; mRotor[21][1] = 8;
mRotor[22][0] = 22; mRotor[22][1] = 21;
mRotor[23][0] = 23; mRotor[23][1] = 9;
mRotor[24][0] = 24; mRotor[24][1] = 26;
mRotor[25][0] = 25; mRotor[25][1] = 17;
fRotor[0][0] = 1; fRotor[0][1] = 8;
fRotor[1][0] = 2; fRotor[1][1] = 18;
fRotor[2][0] = 3; fRotor[2][1] = 26;
fRotor[3][0] = 4; fRotor[3][1] = 17;
fRotor[4][0] = 5; fRotor[4][1] = 20;
fRotor[5][0] = 6; fRotor[5][1] = 22;
fRotor[6][0] = 7; fRotor[6][1] = 10;
fRotor[7][0] = 8; fRotor[7][1] = 3;
fRotor[8][0] = 9; fRotor[8][1] = 13;
fRotor[9][0] = 10; fRotor[9][1] = 11;
fRotor[10][0] = 11; fRotor[10][1] = 4;
fRotor[11][0] = 12; fRotor[11][1] = 23;
fRotor[12][0] = 13; fRotor[12][1] = 5;
fRotor[13][0] = 14; fRotor[13][1] = 24;
fRotor[14][0] = 15; fRotor[14][1] = 9;
fRotor[15][0] = 16; fRotor[15][1] = 12;
fRotor[16][0] = 17; fRotor[16][1] = 25;
fRotor[17][0] = 18; fRotor[17][1] = 16;
fRotor[18][0] = 19; fRotor[18][1] = 19;
fRotor[19][0] = 20; fRotor[19][1] = 6;
fRotor[20][0] = 21; fRotor[20][1] = 15;
fRotor[21][0] = 22; fRotor[21][1] = 21;
fRotor[22][0] = 23; fRotor[22][1] = 2;
fRotor[23][0] = 24; fRotor[23][1] = 7;
fRotor[24][0] = 25; fRotor[24][1] = 1;
fRotor[25][0] = 26; fRotor[25][1] = 14;
for (i = 0; i < FileSize; i++) { //将文档所有A~Z的字母转为1~26的数字表示
if (buffer[i] >= 'A' && buffer[i] <= 'Z') {
buffer[i] -= 64;
}
else if (buffer[i] >= 'a' && buffer[i] <= 'z') {
buffer[i] -= 96;
}
}
for (i = 0; i < FileSize; i++) { //密明文转换
num++; //记录解密次数
if (buffer[i] >= 1 && buffer[i] <= 26) { //if条件跳过空格以及标点符号
m = fRotor[buffer[i] - 1][1];
for (j = 0; j < 26; j++) {
flag++;
if (fRotor[j][0] == m) {
m = fRotor[j][0];
break;
}
}
m = mRotor[flag][1];
flag = -1;
for (j = 0; j < 26; j++) {
flag++;
if (mRotor[j][0] == m) {
m = mRotor[j][0];
break;
}
}
m = sRotor[flag][1];
flag = -1;
for (j = 0; j < 26; j++) {
flag++;
if (sRotor[j][0] == m) {
m = sRotor[j][0];
break;
}
}
buffer[i] = flag + 49 + '0'; //密文输出为字母
flag = -1; //flag回到初始值
arr[0][0] = fRotor[25][0]; //快轮转动一个位置
arr[0][1] = fRotor[25][1];
for (j = 25; j > 0; j--) {
fRotor[j][0] = fRotor[j - 1][0];
fRotor[j][1] = fRotor[j - 1][1];
}
fRotor[0][0] = arr[0][0];
fRotor[0][1] = arr[0][1];
if (num % 26 == 0) { //若快轮已转动一圈则中轮转动一个位置
arr[0][0] = mRotor[25][0]; //中轮转动一个位置
arr[0][1] = mRotor[25][1];
for (j = 25; j > 0; j--) {
mRotor[j][0] = mRotor[j - 1][0];
mRotor[j][1] = mRotor[j - 1][1];
}
mRotor[0][0] = arr[0][0];
mRotor[0][1] = arr[0][1];
}
if (num % (26 * 26) == 0) { //若中轮已转动一圈则慢轮转动一个位置
arr[0][0] = sRotor[25][0]; //慢轮转动一个位置
arr[0][1] = sRotor[25][1];
for (j = 25; j > 0; j--) {
sRotor[j][0] = sRotor[j - 1][0];
sRotor[j][1] = sRotor[j - 1][1];
}
sRotor[0][0] = arr[0][0];
sRotor[0][1] = arr[0][1];
}
}
}
buffer[FileSize] = '\0';
}
/*
//测试加密
void EncryptFile (char buffer[], int FileSize, int key) {
int i;
for(i=0; i<FileSize; i++) {
if (buffer[i] >= 'A' && buffer[i] <= 'Z' || buffer[i] >= 'a' && buffer[i] <= 'z')
buffer[i] = buffer[i] + key;
}
buffer[FileSize] = '\0';
}
*/
//删除文件里空格标点的函数
void FileDelete () {
FILE *fp, *fp2;
int p;
char filename[20];
char filename2[20];
printf("加密前,文件需要删去空格以及标点,请输入要加密文件路径: \n");
scanf("%s", filename);
printf("\n");
fp = fopen(filename, "r");
if (fp == NULL) {
printf("Error!");
}
printf("删去空格以及标点后,请输入需加密文件的另存为路径: \n");
scanf("%s", filename2);
printf("\n");
fp2 = fopen(filename2, "w");
if((fp = fopen(filename,"r")) != NULL) {
while((p = fgetc(fp)) != EOF ) {
if(p >= 65 && p <= 90 || p >= 97 && p <= 122) {
fputc(p,fp2);
}
}
}
fclose(fp);
fclose(fp2);
}
//打开源文件
int openSrcFile (char **buffer) {
FILE *MyfileSrc; //源文件指针
char filename[20]; //文件名数组
long int FileSize; //记录文件的长度
long int i,j;
printf("请输入要加密的文件路径：\n");
scanf("%s", filename);
printf("\n");
if (!(MyfileSrc = fopen(filename,"rb"))) {
printf("Error!");
};
fseek(MyfileSrc, 0, SEEK_END); //判断文件长度
FileSize = ftell(MyfileSrc);
fseek(MyfileSrc, 0, SEEK_SET);
*buffer = (char*)malloc(FileSize); //像堆区申请FileSize大小内存空间
fread(*buffer, 1, FileSize, MyfileSrc); //读入文件
fclose(MyfileSrc);
return FileSize;
}
//储存加密文件
void saveDstFile (char *buffer, int FileSize) {
FILE *MyfileDst; //源文件指针
char filename[20]; //文件名数组
printf("请输入文件加密后要生成的路径：\n");
scanf("%s", filename);
printf("\n");
if (!(MyfileDst = fopen(filename,"wb"))) {
printf("Error!");
}
fprintf(MyfileDst, "%s", buffer);
printf("加密完成，请查看加密生成文件\n");
fclose(MyfileDst);
free(buffer); //释放内存空间
}
void main()
{
FILE *MyfileDst;
char *buffer;
long int FileSize; //记录文本的长度
FileDelete (); //删去源文件的空格和标点
FileSize = openSrcFile(&buffer); //读入源文件
EncryptFile (buffer, FileSize); //加密
//DecryptFile (buffer, FileSize); //解密
saveDstFile (buffer, FileSize);
}