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Implement PAM password verification in swaylock

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master
Drew DeVault 9 years ago
parent d91185d67b
commit 9c141f0bf1
4 changed files with 282 additions and 0 deletions
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245
CMake/FindPAM.cmake
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@ -0,0 +1,245 @@
# - Try to find the PAM libraries
# Once done this will define
#
# PAM_FOUND - system has pam
# PAM_INCLUDE_DIR - the pam include directory
# PAM_LIBRARIES - libpam library
if (PAM_INCLUDE_DIR AND PAM_LIBRARY)
set(PAM_FIND_QUIETLY TRUE)
endif (PAM_INCLUDE_DIR AND PAM_LIBRARY)
find_path(PAM_INCLUDE_DIR NAMES security/pam_appl.h pam/pam_appl.h)
find_library(PAM_LIBRARY pam)
find_library(DL_LIBRARY dl)
if (PAM_INCLUDE_DIR AND PAM_LIBRARY)
set(PAM_FOUND TRUE)
if (DL_LIBRARY)
set(PAM_LIBRARIES ${PAM_LIBRARY} ${DL_LIBRARY})
else (DL_LIBRARY)
set(PAM_LIBRARIES ${PAM_LIBRARY})
endif (DL_LIBRARY)
if (EXISTS ${PAM_INCLUDE_DIR}/pam/pam_appl.h)
set(HAVE_PAM_PAM_APPL_H 1)
endif (EXISTS ${PAM_INCLUDE_DIR}/pam/pam_appl.h)
endif (PAM_INCLUDE_DIR AND PAM_LIBRARY)
if (PAM_FOUND)
if (NOT PAM_FIND_QUIETLY)
message(STATUS "Found PAM: ${PAM_LIBRARIES}")
endif (NOT PAM_FIND_QUIETLY)
else (PAM_FOUND)
if (PAM_FIND_REQUIRED)
message(FATAL_ERROR "PAM was not found")
endif(PAM_FIND_REQUIRED)
endif (PAM_FOUND)
mark_as_advanced(PAM_INCLUDE_DIR PAM_LIBRARY DL_LIBRARY)
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1
CMakeLists.txt
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@ -49,6 +49,7 @@ find_package(WLC REQUIRED)
find_package(Wayland REQUIRED)
find_package(XKBCommon REQUIRED)
find_package(GdkPixbuf REQUIRED)
find_package(PAM REQUIRED)
include(Manpage)

2
swaylock/CMakeLists.txt
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@ -4,6 +4,7 @@ include_directories(
${CAIRO_INCLUDE_DIRS}
${GDK_PIXBUF_INCLUDE_DIRS}
${PANGO_INCLUDE_DIRS}
${PAM_INCLUDE_DIRS}
)
add_executable(swaylock
@ -18,6 +19,7 @@ target_link_libraries(swaylock
${CAIRO_LIBRARIES}
${GDK_PIXBUF_LIBRARIES}
${PANGO_LIBRARIES}
${PAM_LIBRARIES}
m
)

34
swaylock/main.c
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@ -1,4 +1,5 @@
#include "wayland-swaylock-client-protocol.h"
#include <security/pam_appl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -29,6 +30,39 @@ void sway_terminate(void) {
exit(EXIT_FAILURE);
}
struct pam_response *pam_reply;
int function_conversation(int num_msg, const struct pam_message **msg,
struct pam_response **resp, void *appdata_ptr) {
*resp = pam_reply;
return PAM_SUCCESS;
}
/**
* password will be zeroed out.
*/
bool verify_password(const char *username, char *password) {
const struct pam_conv local_conversation = { function_conversation, NULL };
pam_handle_t *local_auth_handle = NULL;
int pam_err;
if ((pam_err = pam_start("swaylock", username, &local_conversation, &local_auth_handle)) != PAM_SUCCESS) {
sway_abort("PAM returned %d\n", pam_err);
}
pam_reply = (struct pam_response *)malloc(sizeof(struct pam_response));
pam_reply[0].resp = password;
pam_reply[0].resp_retcode = 0;
if ((pam_err = pam_authenticate(local_auth_handle, 0)) != PAM_SUCCESS) {
memset(password, 0, strlen(password));
return false;
}
if ((pam_err = pam_end(local_auth_handle, pam_err)) != PAM_SUCCESS) {
memset(password, 0, strlen(password));
return false;
}
memset(password, 0, strlen(password));
return true;
}
void notify_key(enum wl_keyboard_key_state state, xkb_keysym_t sym, uint32_t code, uint32_t codepoint) {
sway_log(L_INFO, "notified of key %c", (char)codepoint);
}

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