From 343ae349c3645c8ad6f80215ceaf685a5b975cc7 Mon Sep 17 00:00:00 2001 From: Iftikhar Ahmad Date: Tue, 16 Oct 2012 14:36:11 +0500 Subject: Improving the test coverage for libpam-freerdp --- src/pam-freerdp.c | 196 ++---------------------------------------------------- 1 file changed, 5 insertions(+), 191 deletions(-) (limited to 'src/pam-freerdp.c') diff --git a/src/pam-freerdp.c b/src/pam-freerdp.c index fbfe182..8979e6e 100644 --- a/src/pam-freerdp.c +++ b/src/pam-freerdp.c @@ -34,11 +34,9 @@ #include #include +#include "pam-freerdp-children.h" #include "auth-check-path.h" -#define PAM_TYPE_DOMAIN 1234 -#define ALL_GOOD_SIGNAL "Ar, ready to authenticate cap'n" - static int unpriveleged_kill (struct passwd * pwdent); static char * global_domain = NULL; @@ -236,44 +234,7 @@ pam_sm_authenticate (pam_handle_t *pamh, int flags, int argc, const char **argv) pid_t pid; switch (pid = fork()) { case 0: { /* child */ - dup2(stdinpipe[0], 0); - - char * args[5]; - - args[0] = (char *)auth_check_path; - args[1] = rhost; - args[2] = ruser; - args[3] = rdomain; - args[4] = NULL; - - struct passwd * pwdent = getpwnam(username); - if (pwdent == NULL) { - _exit(EXIT_FAILURE); - } - - /* Setting groups, but allowing EPERM as if we're not 100% root - we might not be able to do this */ - if (setgroups(1, &pwdent->pw_gid) != 0 && errno != EPERM) { - _exit(EXIT_FAILURE); - } - - if (setgid(pwdent->pw_gid) < 0 || setuid(pwdent->pw_uid) < 0 || - setegid(pwdent->pw_gid) < 0 || seteuid(pwdent->pw_uid) < 0) { - _exit(EXIT_FAILURE); - } - - if (clearenv() != 0) { - _exit(EXIT_FAILURE); - } - - if (chdir(pwdent->pw_dir) != 0) { - _exit(EXIT_FAILURE); - } - - setenv("HOME", pwdent->pw_dir, 1); - - execvp(args[0], args); - _exit(EXIT_FAILURE); + pam_sm_authenticate_helper (stdinpipe, username, rhost, ruser, rdomain); break; } case -1: { /* fork'n error! */ @@ -304,153 +265,7 @@ done: return retval; } -static int -session_socket_handler (struct passwd * pwdent, int readypipe, const char * ruser, const char * rhost, const char * rdomain, const char * password) -{ - /* Socket stuff */ - int socketfd = 0; - struct sockaddr_un socket_addr; - - /* Connected user */ - socklen_t connected_addr_size; - int connectfd = 0; - struct sockaddr_un connected_addr; - - /* Our buffer */ - char * buffer = NULL; - int buffer_len = 0; - int buffer_fill = 0; - - /* Track write out */ - int writedata = 0; - - /* Track ready writing */ - int readywrite = 0; - - /* Setting groups, but allowing EPERM as if we're not 100% root - we might not be able to do this */ - if (setgroups(1, &pwdent->pw_gid) != 0 && errno != EPERM) { - _exit(EXIT_FAILURE); - } - - if (setgid(pwdent->pw_gid) < 0 || setuid(pwdent->pw_uid) < 0 || - setegid(pwdent->pw_gid) < 0 || seteuid(pwdent->pw_uid) < 0) { - /* Don't need to clean up yet */ - return EXIT_FAILURE; - } - - if (clearenv() != 0) { - /* Don't need to clean up yet */ - return EXIT_FAILURE; - } - - if (chdir(pwdent->pw_dir) != 0) { - /* Don't need to clean up yet */ - return EXIT_FAILURE; - } - - if (rdomain[0] == '\0') { - rdomain = "."; - } - - /* Build this up as a buffer so we can just write it and see that - very, very clearly */ - buffer_len += strlen(ruser) + 1; /* Add one for the space */ - buffer_len += strlen(rhost) + 1; /* Add one for the space */ - buffer_len += strlen(rdomain) + 1; /* Add one for the space */ - buffer_len += strlen(password) + 1; /* Add one for the NULL */ - - if (buffer_len < 5) { - /* Don't need to clean up yet */ - return EXIT_FAILURE; - } - - buffer = malloc(buffer_len); - - if (buffer == NULL) { - /* Don't need to clean up yet */ - return EXIT_FAILURE; - } - - /* Lock the buffer before writing */ - if (mlock(buffer, buffer_len) != 0) { - /* We can't lock, we go home */ - goto cleanup; - } - - buffer_fill = snprintf(buffer, buffer_len, "%s %s %s %s", ruser, password, rdomain, rhost); - if (buffer_fill > buffer_len) { - /* This really shouldn't happen, but if for some reason we have an - difference between they way that the lengths are calculated we want - to catch that. */ - goto cleanup; - } - - /* Make our socket and bind it */ - socketfd = socket(AF_UNIX, SOCK_STREAM, 0); - if (socketfd < 0) { - goto cleanup; - } - memset(&socket_addr, 0, sizeof(struct sockaddr_un)); - socket_addr.sun_family = AF_UNIX; - strncpy(socket_addr.sun_path, pwdent->pw_dir, sizeof(socket_addr.sun_path) - 1); - strncpy(socket_addr.sun_path + strlen(pwdent->pw_dir), "/.freerdp-socket", (sizeof(socket_addr.sun_path) - strlen(pwdent->pw_dir)) - 1); - - /* We bind the socket before forking so that we ensure that - there isn't a race condition to get to it. Things will block - otherwise. */ - if (bind(socketfd, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_un)) < 0) { - goto cleanup; - } - - /* Set the socket file permissions to be 600 and the user and group - to be the guest user. NOTE: This won't protect on BSD */ - if (chmod(socket_addr.sun_path, S_IRUSR | S_IWUSR) != 0 || - chown(socket_addr.sun_path, pwdent->pw_uid, pwdent->pw_gid) != 0) { - goto cleanup; - } - - if (listen(socketfd, 1) < 0) { - goto cleanup; - } - - readywrite = write(readypipe, ALL_GOOD_SIGNAL, strlen(ALL_GOOD_SIGNAL) + 1); - if (readywrite != strlen(ALL_GOOD_SIGNAL) + 1) { - goto cleanup; - } - - connected_addr_size = sizeof(struct sockaddr_un); - connectfd = accept(socketfd, (struct sockaddr *)&connected_addr, &connected_addr_size); - if (connectfd < 0) { - goto cleanup; - } - - writedata = write(connectfd, buffer, buffer_len); - -cleanup: - if (socketfd != 0) { - close(socketfd); - } - if (connectfd != 0) { - close(connectfd); - } - - if (buffer != NULL) { - memset(buffer, 0, buffer_len); - munlock(buffer, buffer_len); - free(buffer); - buffer = NULL; - } - - /* This should be only true on the write, so we can use this to check - out as writedata is init to 0 */ - if (writedata == buffer_len) { - return 0; - } - - return EXIT_FAILURE; -} pid_t session_pid = 0; /* Open Session. Here we need to fork a little process so that we can @@ -492,12 +307,11 @@ pam_sm_open_session (pam_handle_t *pamh, int flags, int argc, const char ** argv pid_t pid = fork(); if (pid == 0) { - int retval = 0; - - retval = session_socket_handler(pwdent, sessionready[1], ruser, rhost, rdomain, password); + + int ret = session_socket_handler(pwdent, sessionready[1], ruser, rhost, rdomain, password); close(sessionready[1]); - _exit(retval); + _exit(ret); } else if (pid < 0) { close(sessionready[0]); close(sessionready[1]); -- cgit v1.2.3