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;
-}