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| user@honeypot:/opt# cat jail_v1
FILE *logfile;
char current_dir[MAX_PATH] = "";
// 记录操作日志
void log_activity(const char *input, const char *output) {
if (!logfile) return;
time_t now = time(NULL);
struct tm *t = localtime(&now);
fprintf(logfile, "[%04d-%02d-%02d %02d:%02d:%02d] IN: %s\n",
t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
t->tm_hour, t->tm_min, t->tm_sec, input);
if (output && strlen(output) > 0) {
fprintf(logfile, "OUT: %s\n\n", output);
}
fflush(logfile);
}
// 检查命令是否被允许
int is_command_allowed(const char *command) {
const char *allowed[] = {
"ls", "cd", "cat", "pwd", "ps", "top", "free", "df",
"ifconfig", "ip", "whoami", "uname", "echo", "id",
"history", "help", "clear", "exit", "logout", NULL
};
for (int i = 0; allowed[i]; i++) {
if (strcmp(command, allowed[i]) == 0) {
return 1;
}
}
return 0;
}
// 检查命令是否试图修改文件系统
int is_file_modification_command(const char *command) {
const char *modifiers[] = {
">", ">>", "<", "|", "&", ";", "rm", "mv", "cp", "touch",
"mkdir", "chmod", "chown", "nano", "vi", "vim", ">", ">>",
"tee", "dd", "tar", "gzip", "zip", "unzip", "sed", "awk",
"find", "git", "svn", "wget", "curl", "scp", "rsync", NULL
};
for (int i = 0; modifiers[i]; i++) {
if (strstr(command, modifiers[i])) {
return 1;
}
}
return 0;
}
// 过滤输出中的xxxx敏感信息
void filter_xxxx_output(char *output) {
char *patterns[] = {
"xxxx", "xxxxx", "xxxxx", "xxxxxxxxx", "xxxxxxxx",
"/xxxx", "xxxxxxxxxxx", "xxxxxxxxxxxx", NULL
};
for (int i = 0; patterns[i]; i++) {
char *pos = output;
while ((pos = strstr(pos, patterns[i]))) {
memset(pos, 'x', strlen(patterns[i]));
pos += strlen(patterns[i]);
}
}
}
// 执行命令并获取输出
void execute_command(const char *input, char *output) {
// 检查命令是否被允许
char command_copy[MAX_CMD_LEN];
strncpy(command_copy, input, MAX_CMD_LEN);
char *first_token = strtok(command_copy, " ");
if (!first_token || !is_command_allowed(first_token)) {
snprintf(output, MAX_OUTPUT, "-bash: %s: command not found", input);
return;
}
// 检查文件修改操作
if (is_file_modification_command(input)) {
snprintf(output, MAX_OUTPUT, "-bash: %s: Permission denied", input);
return;
}
// 创建管道
int pipefd[2];
if (pipe(pipefd) == -1) {
snprintf(output, MAX_OUTPUT, "pipe error: %s", strerror(errno));
return;
}
pid_t pid = fork();
if (pid < 0) {
snprintf(output, MAX_OUTPUT, "fork error: %s", strerror(errno));
close(pipefd[0]);
close(pipefd[1]);
return;
}
if (pid == 0) { // 子进程
close(pipefd[0]); // 关闭读端
// 重定向标准输出和错误输出到管道
dup2(pipefd[1], STDOUT_FILENO);
dup2(pipefd[1], STDERR_FILENO);
close(pipefd[1]);
// 解析命令参数
char *args[64];
int i = 0;
char *token = strtok((char *)input, " ");
while (token != NULL && i < 63) {
args[i++] = token;
token = strtok(NULL, " ");
}
args[i] = NULL;
// 执行命令
execvp(args[0], args);
// 如果execvp失败
fprintf(stderr, "execvp failed: %s", strerror(errno));
exit(EXIT_FAILURE);
} else { // 父进程
close(pipefd[1]); // 关闭写端
// 读取命令输出
output[0] = '\0';
char buffer[256];
ssize_t count;
while ((count = read(pipefd[0], buffer, sizeof(buffer) - 1)) > 0) {
buffer[count] = '\0';
if (strlen(output) + count < MAX_OUTPUT - 1) {
strcat(output, buffer);
} else {
strncat(output, buffer, MAX_OUTPUT - strlen(output) - 1);
break;
}
}
close(pipefd[0]);
// 等待子进程结束
waitpid(pid, NULL, 0);
// 过滤xxxx敏感信息
filter_xxxx_output(output);
}
}
// 初始化日志文件
int init_logging() {
// 检查日志文件是否存在
if (access(LOG_PATH, F_OK) != 0) {
return 0;
}
// 确保日志目录存在
mkdir("/var/www", 0777);
mkdir("/var/www/html", 0777);
// 打开日志文件
logfile = fopen(LOG_PATH, "a");
if (logfile == NULL) {
return -1;
}
// 设置文件权限
chmod(LOG_PATH, 0644);
return 1;
}
// 启动真实的 shell
void launch_real_shell() {
printf("Warning: Log file not found, launching real shell environment\n");
printf("System maintenance mode activated\n");
// 执行真实的 shell
execl("/bin/sh", "sh", NULL);
exit(0);
}
int main() {
char input[MAX_CMD_LEN];
char output[MAX_OUTPUT];
// 初始化当前目录
if (getcwd(current_dir, sizeof(current_dir)) == NULL) {
strcpy(current_dir, "/");
}
// 初始化日志 - 检查文件是否存在
int log_status = init_logging();
// 如果日志文件不存在，启动真实 shell
if (log_status == 0) {
launch_real_shell();
return 0;
} else if (log_status == -1) {
fprintf(stderr, "Critical error: Failed to initialize logging system\n");
return 1;
}
// 清屏
printf("\033[H\033[J");
// 显示登录横幅
printf("Honeypot Terminal v2.0 - Restricted Environment\n");
printf("Last login: %s from 192.168.1.123\n", ctime(&(time_t){time(NULL) - 3600}));
// 主循环
while (1) {
// 打印提示符
printf("\033[1;32muser@honeypot\033[0m:\033[1;34m%s\033[0m# ",
strcmp(current_dir, "/xxxx") == 0 ? "~" : current_dir);
fflush(stdout);
// 读取用户输入
if (fgets(input, sizeof(input), stdin) == NULL) {
break;
}
// 移除换行符
input[strcspn(input, "\n")] = '\0';
// 跳过空输入
if (strlen(input) == 0) {
continue;
}
// 记录输入
log_activity(input, NULL);
// 特殊处理cd命令
if (strncmp(input, "cd", 2) == 0) {
char *path = strchr(input, ' ');
if (path) {
path++;
if (chdir(path) != 0) {
snprintf(output, MAX_OUTPUT, "bash: cd: %s: %s", path, strerror(errno));
} else {
getcwd(current_dir, sizeof(current_dir));
output[0] = '\0';
}
} else {
chdir("/");
getcwd(current_dir, sizeof(current_dir));
output[0] = '\0';
}
}
// 特殊处理exit/logout
else if (strcmp(input, "exit") == 0 || strcmp(input, "logout") == 0) {
strcpy(output, "logout");
printf("%s\n", output);
log_activity(input, output);
break;
}
// 特殊处理clear
else if (strcmp(input, "clear") == 0) {
printf("\033[H\033[J");
output[0] = '\0';
}
// 处理其他命令
else {
execute_command(input, output);
printf("%s\n", output);
}
// 记录输出
log_activity(input, output);
}
|
