diff options
| -rw-r--r-- | lib/libpam/modules/pam_login_access/login_access.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/lib/libpam/modules/pam_login_access/login_access.c b/lib/libpam/modules/pam_login_access/login_access.c index 059667ab2de2..3f74190d8925 100644 --- a/lib/libpam/modules/pam_login_access/login_access.c +++ b/lib/libpam/modules/pam_login_access/login_access.c @@ -17,10 +17,12 @@ static char sccsid[] = "%Z% %M% %I% %E% %U%"; __FBSDID("$FreeBSD$"); #include <sys/types.h> +#include <sys/param.h> #include <ctype.h> #include <errno.h> #include <grp.h> #include <netdb.h> +#include <pwd.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -174,6 +176,9 @@ static int user_match(const char *tok, const char *string) { struct group *group; + struct passwd *passwd; + gid_t *grouplist; + int ngroups = NGROUPS; int i; /* @@ -186,10 +191,37 @@ user_match(const char *tok, const char *string) return (netgroup_match(tok + 1, (char *) 0, string)); } else if (string_match(tok, string)) { /* ALL or exact match */ return (YES); - } else if ((group = getgrnam(tok)) != NULL) {/* try group membership */ - for (i = 0; group->gr_mem[i]; i++) - if (strcasecmp(string, group->gr_mem[i]) == 0) + } else { + if ((passwd = getpwnam(string)) == NULL) + return (NO); + errno = 0; + if ((group = getgrnam(tok)) == NULL) {/* try group membership */ + if (errno != 0) { + syslog(LOG_ERR, "getgrnam() failed for %s: %s", string, strerror(errno)); + } else { + syslog(LOG_NOTICE, "group not found: %s", string); + } + return (NO); + } + errno = 0; + if ((grouplist = calloc(ngroups, sizeof(gid_t))) == NULL) { + if (errno == ENOMEM) { + syslog(LOG_ERR, "cannot allocate memory for grouplist: %s", string); + } + return (NO); + } + if (getgrouplist(string, passwd->pw_gid, grouplist, &ngroups) != 0) { + syslog(LOG_ERR, "getgrouplist() failed for %s", string); + free(grouplist); + return (NO); + } + for (i = 0; i < ngroups; i++) { + if (grouplist[i] == group->gr_gid) { + free(grouplist); return (YES); + } + } + free(grouplist); } return (NO); } |