From b53e002de0d70645a99037f89056f51d4bbb575d Mon Sep 17 00:00:00 2001
From: Falk Werner <falk.werner@gmx.net>
Date: Thu, 19 Mar 2020 18:33:16 +0100
Subject: [PATCH] added dependency to linux-pam

---
 .travis.yml         |  1 +
 CMakeLists.txt      |  7 ++++++-
 README.md           |  6 ++++++
 cmake/FindPam.cmake | 22 ++++++++++++++++++++++
 test/test_pam.cc    | 13 +++++++++++++
 5 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 cmake/FindPam.cmake
 create mode 100644 test/test_pam.cc

diff --git a/.travis.yml b/.travis.yml
index cb75952..fce4617 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,6 +25,7 @@ addons:
             - python3-wheel
             - ninja-build
             - libconfig-dev
+            - libpam0g-dev
             - valgrind
 
 env:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 54e7b26..bfe643f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,8 @@ project(webfused VERSION 0.1.0 DESCRIPTION "Webfuse daemon")
 
 option(WITHOUT_TESTS   "disable unit tests"   OFF)
 
+set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
 
@@ -14,6 +16,7 @@ pkg_check_modules(UUID REQUIRED uuid)
 pkg_check_modules(LIBCONFIG REQUIRED libconfig)
 pkg_check_modules(OPENSSL REQUIRED openssl)
 pkg_check_modules(WEBFUSE REQUIRED libwebfuse-adapter)
+find_package(Pam REQUIRED)
 
 add_definitions(-D_FILE_OFFSET_BITS=64)
 
@@ -33,7 +36,6 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(C_WARNINGS -Wall -Wextra)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 include(coverage)
 
 add_library(userdb STATIC 
@@ -76,6 +78,7 @@ target_link_libraries(webfused PUBLIC
     ${OPENSSL_LIBRARIES}
     ${WEBFUSE_LIBRARIES}
     ${UUID_LIBRARIES}
+	${PAM_LIBRARIES}
 )
 
 target_compile_options(webfused PUBLIC ${OPENSSL_CFLAGS_OTHER})
@@ -130,6 +133,7 @@ add_executable(alltests
 	test/test_stderr_logger.cc
 	test/test_syslog_logger.cc
 	test/test_daemon.cc
+	test/test_pam.cc
 )
 
 target_include_directories(alltests PRIVATE
@@ -165,6 +169,7 @@ target_link_libraries(alltests PRIVATE
 	${LIBCONFIG_LIBRARIES}
     ${WEBFUSE_LIBRARIES}
     ${UUID_LIBRARIES}
+	${PAM_LIBRARIES}
 	${OPENSSL_LIBRARIES}
 	${GMOCK_LIBRARIES}
 	${GTEST_LIBRARIES}
diff --git a/README.md b/README.md
index 92b59de..de31921 100644
--- a/README.md
+++ b/README.md
@@ -180,6 +180,7 @@ switch to *user* and *group* provided in config file.
   - [jansson](https://github.com/akheron/jansson)
 - [openssl](https://www.openssl.org/)
 - [libconfig](https://hyperrealm.github.io/libconfig/)
+- [linux-pam](http://www.linux-pam.org/)
 - [Google Test](https://github.com/google/googletest) *(Test only)*
 
 ### Installing dependencies
@@ -240,6 +241,11 @@ To install libfuse, meson is needed. Please refer to [meson quick guide](https:/
     sudo apt update
     sudo apt install libconfig-dev
 
+#### linux-pam
+
+    sudo apt update
+    sudo apt install libpam0g-dev
+
 #### GoogleTest
 
 Installation of GoogleTest is optional webfuse library, but required to compile tests.
diff --git a/cmake/FindPam.cmake b/cmake/FindPam.cmake
new file mode 100644
index 0000000..181be36
--- /dev/null
+++ b/cmake/FindPam.cmake
@@ -0,0 +1,22 @@
+find_package(PkgConfig)
+pkg_check_modules(PC_PAM QUIET pam)
+set(PAM_DEFINITIONS ${PC_PAM_CFLAGS_OTHER})
+
+find_path(PAM_INCLUDE_DIR security/pam_appl.h
+    HINTS ${PC_PAM_INCLUDEDIR} ${PC_PAM_INCLUDE_DIRS}
+)
+
+find_library(PAM_LIBRARY NAMES pam
+    HINTS ${PC_PAM_LIBDIR} ${PC_PAM_LIBRARY_DIRS}
+)
+
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(Pam DEFAULT_MSG
+    PAM_LIBRARY PAM_INCLUDE_DIR
+)
+
+mark_as_advanced(PAM_INCLUDE_DIR PAM_LIBRARY)
+
+set(PAM_LIBRARIES ${PAM_LIBRARY})
+set(PAM_INCLUDE_DIRS ${PAM_INCLUDE_DIR})
diff --git a/test/test_pam.cc b/test/test_pam.cc
new file mode 100644
index 0000000..0f16bac
--- /dev/null
+++ b/test/test_pam.cc
@@ -0,0 +1,13 @@
+#include <security/pam_appl.h>
+#include <gtest/gtest.h>
+
+TEST(pam, start)
+{
+    pam_handle_t * handle = nullptr;
+    struct pam_conv conv = { nullptr, nullptr };
+    int rc = pam_start("test", nullptr, &conv, &handle);
+    if (PAM_SUCCESS == rc)
+    {
+        pam_end(handle, 0);
+    }
+}
\ No newline at end of file