aboutsummaryrefslogtreecommitdiff
path: root/src/kms/kms_client.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/kms/kms_client.c')
-rw-r--r--src/kms/kms_client.c245
1 files changed, 0 insertions, 245 deletions
diff --git a/src/kms/kms_client.c b/src/kms/kms_client.c
deleted file mode 100644
index cddd8ff..0000000
--- a/src/kms/kms_client.c
+++ /dev/null
@@ -1,245 +0,0 @@
-#include "../../include/kms/kms_client.h"
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <limits.h>
-#include <stdbool.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/wait.h>
-#include <sys/capability.h>
-
-static bool is_inside_flatpak(void) {
- return getenv("FLATPAK_ID") != NULL;
-}
-
-static int send_msg_to_server(int server_fd, gsr_kms_request *request) {
- struct iovec iov;
- iov.iov_base = request;
- iov.iov_len = sizeof(*request);
-
- struct msghdr request_message = {0};
- request_message.msg_iov = &iov;
- request_message.msg_iovlen = 1;
-
- return sendmsg(server_fd, &request_message, 0);
-}
-
-static int recv_msg_from_server(int server_fd, gsr_kms_response *response) {
- struct iovec iov;
- iov.iov_base = response;
- iov.iov_len = sizeof(*response);
-
- struct msghdr response_message = {0};
- response_message.msg_iov = &iov;
- response_message.msg_iovlen = 1;
-
- char cmsgbuf[CMSG_SPACE(sizeof(int))];
- memset(cmsgbuf, 0, sizeof(cmsgbuf));
- response_message.msg_control = cmsgbuf;
- response_message.msg_controllen = sizeof(cmsgbuf);
-
- int res = recvmsg(server_fd, &response_message, MSG_WAITALL);
- if(res <= 0)
- return res;
-
- if(response->result == KMS_RESULT_OK)
- response->data.fd.fd = 0;
-
- struct cmsghdr *cmsg = CMSG_FIRSTHDR(&response_message);
- if(cmsg) {
- fprintf(stderr, "got cmsg, %d\n", cmsg->cmsg_type);
- if(cmsg->cmsg_type == SCM_RIGHTS) {
- int kms_fd = 0;
- memcpy(&kms_fd, CMSG_DATA(cmsg), sizeof(int));
- fprintf(stderr, "kms fd: %d\n", kms_fd);
- response->data.fd.fd = kms_fd;
- }
- }
-
- return res;
-}
-
-int gsr_kms_client_init(gsr_kms_client *self, const char *card_path, const char *program_dir) {
- self->kms_server_pid = -1;
- self->card_path = NULL;
- self->socket_fd = -1;
- self->client_fd = -1;
- self->socket_path[0] = '\0';
- struct sockaddr_un local_addr = {0};
- struct sockaddr_un remote_addr = {0};
-
- bool inside_flatpak = is_inside_flatpak();
- char server_filepath[PATH_MAX];
- snprintf(server_filepath, sizeof(server_filepath), "%s/%s", program_dir, "gsr-kms-server");
- if(access(server_filepath, F_OK) != 0 || inside_flatpak)
- snprintf(server_filepath, sizeof(server_filepath), "gsr-kms-server"); // Assume gsr-kms-server is in $PATH
-
- bool has_perm = 0;
- if(geteuid() == 0) {
- has_perm = true;
- } else {
- cap_t kms_server_cap = cap_get_file(server_filepath);
- if(kms_server_cap) {
- cap_flag_value_t res = 0;
- cap_get_flag(kms_server_cap, CAP_SYS_ADMIN, CAP_PERMITTED, &res);
- if(res == CAP_SET) {
- //fprintf(stderr, "has permission!\n");
- has_perm = true;
- } else {
- //fprintf(stderr, "No permission:(\n");
- }
- cap_free(kms_server_cap);
- } else {
- if(errno == ENODATA)
- fprintf(stderr, "gsr info: gsr_kms_client_init: gsr-kms-server is missing sys_admin cap and will require root authentication. To bypass this automatically, run: sudo setcap cap_sys_admin+ep '%s'\n", server_filepath);
- else
- fprintf(stderr, "gsr info: gsr_kms_client_init: failed to get cap\n");
- }
- }
-
- fprintf(stderr, "gsr info: gsr server path: %s, exists: %s\n", server_filepath, access(server_filepath, F_OK) == 0 ? "yes" : "no");
-
- self->card_path = strdup(card_path);
- if(!self->card_path) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: failed to duplicate card_path\n");
- goto err;
- }
-
- strcpy(self->socket_path, "/tmp/gsr-kms-socket-XXXXXX");
- if(!tmpnam(self->socket_path)) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: mkstemp failed, error: %s\n", strerror(errno));
- goto err;
- }
-
- self->socket_fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if(self->socket_fd == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: socket failed, error: %s\n", strerror(errno));
- goto err;
- }
-
- local_addr.sun_family = AF_UNIX;
- strncpy(local_addr.sun_path, self->socket_path, sizeof(local_addr.sun_path));
- if(bind(self->socket_fd, (struct sockaddr*)&local_addr, sizeof(local_addr.sun_family) + strlen(local_addr.sun_path)) == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: failed to bind socket, error: %s\n", strerror(errno));
- goto err;
- }
-
- if(listen(self->socket_fd, 1) == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: failed to listen on socket, error: %s\n", strerror(errno));
- goto err;
- }
-
- pid_t pid = fork();
- if(pid == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: fork failed, error: %s\n", strerror(errno));
- goto err;
- } else if(pid == 0) { /* child */
- if(has_perm) {
- const char *args[] = { server_filepath, self->socket_path, NULL };
- execvp(args[0], (char *const*)args);
- } else if(inside_flatpak) {
- const char *args[] = { "flatpak-spawn", "--host", "pkexec", server_filepath, self->socket_path, NULL };
- execvp(args[0], (char *const*)args);
- } else {
- const char *args[] = { "pkexec", server_filepath, self->socket_path, NULL };
- execvp(args[0], (char *const*)args);
- }
- perror("execvp");
- _exit(127);
- } else { /* parent */
- self->kms_server_pid = pid;
- }
-
- fprintf(stderr, "gsr info: gsr_kms_client_init: waiting for client to connect\n");
- for(;;) {
- struct timeval tv;
- fd_set rfds;
- FD_ZERO(&rfds);
- FD_SET(self->socket_fd, &rfds);
-
- tv.tv_sec = 0;
- tv.tv_usec = 100 * 1000; // 100 ms
-
- int select_res = select(1 + self->socket_fd, &rfds, NULL, NULL, &tv);
- if(select_res > 0) {
- socklen_t sock_len = 0;
- self->client_fd = accept(self->socket_fd, (struct sockaddr*)&remote_addr, &sock_len);
- if(self->client_fd == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: accept failed on socket, error: %s\n", strerror(errno));
- goto err;
- }
- break;
- } else {
- int status;
- int wait_result = waitpid(self->kms_server_pid, &status, WNOHANG);
- if(wait_result != 0) {
- fprintf(stderr, "gsr error: gsr_kms_client_init: kms server died or never started, error: %s\n", strerror(errno));
- goto err;
- }
- }
- }
- fprintf(stderr, "gsr info: gsr_kms_client_init: client connected\n");
-
- return 0;
-
- err:
- gsr_kms_client_deinit(self);
- return -1;
-}
-
-void gsr_kms_client_deinit(gsr_kms_client *self) {
- if(self->card_path) {
- free(self->card_path);
- self->card_path = NULL;
- }
-
- if(self->client_fd != -1) {
- close(self->client_fd);
- self->client_fd = -1;
- }
-
- if(self->socket_fd != -1) {
- close(self->socket_fd);
- self->socket_fd = -1;
- }
-
- if(self->kms_server_pid != -1) {
- kill(self->kms_server_pid, SIGINT);
- int status;
- waitpid(self->kms_server_pid, &status, 0);
- self->kms_server_pid = -1;
- }
-
- if(self->socket_path[0] != '\0') {
- remove(self->socket_path);
- self->socket_path[0] = '\0';
- }
-}
-
-int gsr_kms_client_get_kms(gsr_kms_client *self, gsr_kms_response *response) {
- response->result = KMS_RESULT_FAILED_TO_SEND;
- strcpy(response->data.err_msg, "failed to send");
-
- gsr_kms_request request;
- request.type = KMS_REQUEST_TYPE_GET_KMS;
- strcpy(request.data.card_path, self->card_path);
- if(send_msg_to_server(self->client_fd, &request) == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_get_kms: failed to send request message to server\n");
- return -1;
- }
-
- const int recv_res = recv_msg_from_server(self->client_fd, response);
- if(recv_res == 0) {
- fprintf(stderr, "gsr warning: gsr_kms_client_get_kms: kms server shut down\n");
- return -1;
- } else if(recv_res == -1) {
- fprintf(stderr, "gsr error: gsr_kms_client_get_kms: failed to receive response\n");
- return -1;
- }
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 08:39:21 +0000