Brief C Programs of the Bombs

这是一个关于炸弹的简短的 C 代码，了解思路即可哈！

参考资料

反汇编思路及过程：拆解二进制炸弹详解

phase_1 C语言代码

string input;
cin >> input;

string answer = "Let's begin now!";
if (input == answer)
	return;
else
	explode_bomb();

phase_2 C语言代码

//假设 ID_num 为 11 位
int input[6];
for (int i = 0; i < 6; ++i)
	cin >> a[i];

//爆炸点
if (a[0] != 1)
	explode_bomb();

for (int i = 0; i < 5; ++i) {
	int ID = ID_num[10 - i];
	if (a[i] * ID != a[i + 1])
		explode_bomb();
}

phase_3 C语言代码

int a[2];
char c;
cin >> a[0] >> c >> a[1];

int ID = 输入ID的最后一位
char c0;
int b;
switch (a[0]) {
	case 0 : {
		c0 = 'q';
		b = 777;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 1 : {
		c0 = 'b';
		b = 214;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 2 : {
		c0 = 'b';
		b = 755;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 3 : {
		c0 = 'k';
		b = 0;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 4 : {
		c0 = 'o';
		b = 228;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 5 : {
		c0 = 't';
		b = 513;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 6 : {
		c0 = 'v';
		b = 780;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	case 7 : {
		c0 = 'b';
		b = 824;
		if (ID * a[1] != b)
			explode_bomb();
		break;
		}
	default:
		explode_bomb();
	}
	
if (c != c0)
	explode_bomb();

phase_4 C语言代码

int ID = 输入学号最后一位
int fun4(int x)
{
	if (x < 2)
		return 1;
	return fun4(x - 1) + fun4(x - 2);
}

int x;
cin >> x;

if (ID 为奇数) {
	if (fun4(x) != 8)
		explode_bomb();
}
else {
	if (fun4(x) != 13)
		explode_bomb();
}

phase_5 C语言代码

char S[16] = "isrveawhobpnutfg";
char answer[6] = "giants";

char input[6];
cin >> input;

char a[6];
for (int i = 0; i < 6; ++i) {
	int pos = str[i] & 15;
	a[i] = S[pos];
}

for (int i = 0; i < 6; ++i) {
	if (a[i] != answer[i])
		explode_bomb();
}

phase_6 C语言代码

int a[6];
for (int i = 0;i < 6;i++)
	cin>>a[i];

for (int i = 0;i < 6;i++) {
	if (!(i > 0 && i < 7) explode_bomb();
	for (int j = i + 1;j < 6;j++)
		if (a[i] == a[j]) explode_bomb();
}
chain c = {0x0fd, 0x2d5, 0x12d, 0x3e5, 0x0d4, 0x1b0};
chainNode res[6];
for (int i = 0;i < 6;i++) {
	chainNode *node = c.firstNode;
	for (int j = 1;j < a[i];j++)
		node = node->next;
	res[i] = node;
}

chainNode *node = res[0];
for (int i = 1;i < 6;i++) {
	node->next = res[i];
	node = res[i];
}
node->next = null;
if (ID & 1) {
	node = c.firstNode;
	for (int i = 1;i < 6;i++)
		if (node->element < node->next->element)
			explode_bomb();
}
else {
	node = c.firstNode;
	for (int i = 1;i < 6;i++)
		if (node->element > node->next->element)
			explode_bomb();
}

隐藏炸弹的代码过段时间再进行补充。