1 files changed, 0 insertions, 155 deletions

diff --git a/swaylock/shadow.c b/swaylock/shadow.c
deleted file mode 100644
index b7b10a67..00000000
--- a/swaylock/shadow.c
+++ /dev/null
@@ -1,155 +0,0 @@
-#define _XOPEN_SOURCE // for crypt
-#include <pwd.h>
-#include <shadow.h>
-#include <stdbool.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <wlr/util/log.h>
-#include "swaylock/swaylock.h"
-#ifdef __GLIBC__
-// GNU, you damn slimy bastard
-#include <crypt.h>
-#endif
-
-static int comm[2][2];
-
-static void clear_buffer(void *buf, size_t bytes) {
-        volatile char *buffer = buf;
-        volatile char zero = '\0';
-        for (size_t i = 0; i < bytes; ++i) {
-                buffer[i] = zero;
-        }
-}
-
-void run_child(void) {
-        /* This code runs as root */
-        struct passwd *pwent = getpwuid(getuid());
-        if (!pwent) {
-                wlr_log_errno(WLR_ERROR, "failed to getpwuid");
-                exit(EXIT_FAILURE);
-        }
-        char *encpw = pwent->pw_passwd;
-        if (strcmp(encpw, "x") == 0) {
-                struct spwd *swent = getspnam(pwent->pw_name);
-                if (!swent) {
-                        wlr_log_errno(WLR_ERROR, "failed to getspnam");
-                        exit(EXIT_FAILURE);
-                }
-                encpw = swent->sp_pwdp;
-        }
-
-        /* We don't need any additional logging here because the parent process will
-         * also fail here and will handle logging for us. */
-        if (setgid(getgid()) != 0) {
-                exit(EXIT_FAILURE);
-        }
-        if (setuid(getuid()) != 0) {
-                exit(EXIT_FAILURE);
-        }
-
-        /* This code does not run as root */
-        wlr_log(WLR_DEBUG, "prepared to authorize user %s", pwent->pw_name);
-
-        size_t size;
-        char *buf;
-        while (1) {
-                ssize_t amt;
-                amt = read(comm[0][0], &size, sizeof(size));
-                if (amt == 0) {
-                        break;
-                } else if (amt < 0) {
-                        wlr_log_errno(WLR_ERROR, "read pw request");
-                }
-                wlr_log(WLR_DEBUG, "received pw check request");
-                buf = malloc(size);
-                if (!buf) {
-                        wlr_log_errno(WLR_ERROR, "failed to malloc pw buffer");
-                        exit(EXIT_FAILURE);
-                }
-                size_t offs = 0;
-                do {
-                        amt = read(comm[0][0], &buf[offs], size - offs);
-                        if (amt <= 0) {
-                                wlr_log_errno(WLR_ERROR, "failed to read pw");
-                                exit(EXIT_FAILURE);
-                        }
-                        offs += (size_t)amt;
-                } while (offs < size);
-                bool result = false;
-                char *c = crypt(buf, encpw);
-                if (c == NULL) {
-                        wlr_log_errno(WLR_ERROR, "crypt");
-                }
-                result = strcmp(c, encpw) == 0;
-                if (write(comm[1][1], &result, sizeof(result)) != sizeof(result)) {
-                        wlr_log_errno(WLR_ERROR, "failed to write pw check result");
-                        clear_buffer(buf, size);
-                        exit(EXIT_FAILURE);
-                }
-                clear_buffer(buf, size);
-                free(buf);
-        }
-
-        clear_buffer(encpw, strlen(encpw));
-        exit(EXIT_SUCCESS);
-}
-
-void initialize_pw_backend(void) {
-        if (geteuid() != 0) {
-                wlr_log(WLR_ERROR, "swaylock needs to be setuid to read /etc/shadow");
-                exit(EXIT_FAILURE);
-        }
-        if (pipe(comm[0]) != 0) {
-                wlr_log_errno(WLR_ERROR, "failed to create pipe");
-                exit(EXIT_FAILURE);
-        }
-        if (pipe(comm[1]) != 0) {
-                wlr_log_errno(WLR_ERROR, "failed to create pipe");
-                exit(EXIT_FAILURE);
-        }
-        pid_t child = fork();
-        if (child == 0) {
-                close(comm[0][1]);
-                close(comm[1][0]);
-                run_child();
-        } else if (child < 0) {
-                wlr_log_errno(WLR_ERROR, "failed to fork");
-                exit(EXIT_FAILURE);
-        }
-        close(comm[0][0]);
-        close(comm[1][1]);
-        if (setgid(getgid()) != 0) {
-                wlr_log_errno(WLR_ERROR, "Unable to drop root");
-                exit(EXIT_FAILURE);
-        }
-        if (setuid(getuid()) != 0) {
-                wlr_log_errno(WLR_ERROR, "Unable to drop root");
-                exit(EXIT_FAILURE);
-        }
-}
-
-bool attempt_password(struct swaylock_password *pw) {
-        bool result = false;
-        size_t len = pw->len + 1;
-        size_t offs = 0;
-        if (write(comm[0][1], &len, sizeof(len)) < 0) {
-                wlr_log_errno(WLR_ERROR, "Failed to request pw check");
-                goto ret;
-        }
-        do {
-                ssize_t amt = write(comm[0][1], &pw->buffer[offs], len - offs);
-                if (amt < 0) {
-                        wlr_log_errno(WLR_ERROR, "Failed to write pw buffer");
-                        goto ret;
-                }
-                offs += amt;
-        } while (offs < len);
-        if (read(comm[1][0], &result, sizeof(result)) != sizeof(result)) {
-                wlr_log_errno(WLR_ERROR, "Failed to read pw result");
-                goto ret;
-        }
-        wlr_log(WLR_DEBUG, "pw result: %d", result);
-ret:
-        clear_password_buffer(pw);
-        return result;
-}