diff options
Diffstat (limited to 'contrib/libpam/modules/pam_listfile/pam_listfile.c')
-rw-r--r-- | contrib/libpam/modules/pam_listfile/pam_listfile.c | 436 |
1 files changed, 0 insertions, 436 deletions
diff --git a/contrib/libpam/modules/pam_listfile/pam_listfile.c b/contrib/libpam/modules/pam_listfile/pam_listfile.c deleted file mode 100644 index e54b12a..0000000 --- a/contrib/libpam/modules/pam_listfile/pam_listfile.c +++ /dev/null @@ -1,436 +0,0 @@ -/* - * $Id: pam_listfile.c,v 1.6 1997/04/05 06:38:35 morgan Exp $ - * - * $Log: pam_listfile.c,v $ - * Revision 1.6 1997/04/05 06:38:35 morgan - * reformat mostly - * - * Revision 1.5 1997/02/15 17:29:41 morgan - * removed fixed length buffer in logging - * - * Revision 1.4 1997/01/04 20:32:10 morgan - * ammendments for pam_listfile handling - * - * Revision 1.3 1996/11/10 21:02:08 morgan - * compiles with .53 - * - * Revision 1.2 1996/09/05 06:22:58 morgan - * Michael's patches - * - */ - -/* - * by Elliot Lee <sopwith@redhat.com>, Red Hat Software. - * July 25, 1996. - * This code shamelessly ripped from the pam_rootok module. - */ - -#ifdef linux -# define _SVID_SOURCE -# define _BSD_SOURCE -# define __USE_BSD -# define __USE_SVID -# define __USE_MISC -# define _GNU_SOURCE -# include <features.h> -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include <syslog.h> -#include <stdarg.h> -#include <string.h> -#include <pwd.h> -#include <grp.h> - -#ifdef DEBUG -#include <assert.h> -#endif - -/* - * here, we make a definition for the externally accessible function - * in this file (this definition is required for static a module - * but strongly encouraged generally) it is used to instruct the - * modules include file to define the function prototypes. - */ - -#define PAM_SM_AUTH - -#include <security/pam_modules.h> -#include <security/_pam_macros.h> - -/* some syslogging */ - -static void _pam_log(int err, const char *format, ...) -{ - va_list args; - - va_start(args, format); - openlog("PAM-listfile", LOG_CONS|LOG_PID, LOG_AUTH); - vsyslog(err, format, args); - va_end(args); - closelog(); -} - -/* checks if a user is on a list of members */ -static int is_on_list(char * const *list, const char *member) -{ - while (*list) { - if (strcmp(*list, member) == 0) - return 1; - list++; - } - return 0; -} - -/* Checks if a user is a member of a group */ -static int is_on_group(const char *user_name, const char *group_name) -{ - struct passwd *pwd; - struct group *grp, *pgrp; - char uname[BUFSIZ], gname[BUFSIZ]; - - if (!strlen(user_name)) - return 0; - if (!strlen(group_name)) - return 0; - bzero(uname, sizeof(uname)); - strncpy(uname, user_name, BUFSIZ-1); - bzero(gname, sizeof(gname)); - strncpy(gname, group_name, BUFSIZ-1); - - setpwent(); - pwd = getpwnam(uname); - endpwent(); - if (!pwd) - return 0; - - /* the info about this group */ - setgrent(); - grp = getgrnam(gname); - endgrent(); - if (!grp) - return 0; - - /* first check: is a member of the group_name group ? */ - if (is_on_list(grp->gr_mem, uname)) - return 1; - - /* next check: user primary group is group_name ? */ - setgrent(); - pgrp = getgrgid(pwd->pw_gid); - endgrent(); - if (!pgrp) - return 0; - if (!strcmp(pgrp->gr_name, gname)) - return 1; - - return 0; -} - -/* --- authentication management functions (only) --- */ - -/* Extended Items that are not directly available via pam_get_item() */ -#define EI_GROUP (1 << 0) -#define EI_SHELL (1 << 1) - -/* Constants for apply= parameter */ -#define APPLY_TYPE_NULL 0 -#define APPLY_TYPE_NONE 1 -#define APPLY_TYPE_USER 2 -#define APPLY_TYPE_GROUP 3 - -PAM_EXTERN -int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv) -{ - int retval, i, citem=0, extitem=0, onerr=PAM_SERVICE_ERR, sense=2; - const char *citemp; - char *ifname=NULL; - char aline[256]; - char mybuf[256],myval[256]; - struct stat fileinfo; - FILE *inf; - char apply_val[256]; - int apply_type; - - /* Stuff for "extended" items */ - struct passwd *userinfo; - struct group *grpinfo; - char *itemlist[256]; /* Maximum of 256 items */ - - D(("called.")); - - apply_type=APPLY_TYPE_NULL; - memset(apply_val,0,sizeof(apply_val)); - - for(i=0; i < argc; i++) { - { - char *junk; - junk = (char *) malloc(strlen(argv[i])+1); - if (junk == NULL) { - return PAM_BUF_ERR; - } - strcpy(junk,argv[i]); - strncpy(mybuf,strtok(junk,"="),255); - strncpy(myval,strtok(NULL,"="),255); - free(junk); - } - if(!strcmp(mybuf,"onerr")) - if(!strcmp(myval,"succeed")) - onerr = PAM_SUCCESS; - else if(!strcmp(myval,"fail")) - onerr = PAM_SERVICE_ERR; - else - return PAM_SERVICE_ERR; - else if(!strcmp(mybuf,"sense")) - if(!strcmp(myval,"allow")) - sense=0; - else if(!strcmp(myval,"deny")) - sense=1; - else - return onerr; - else if(!strcmp(mybuf,"file")) { - ifname = (char *)malloc(strlen(myval)+1); - strcpy(ifname,myval); - } else if(!strcmp(mybuf,"item")) - if(!strcmp(myval,"user")) - citem = PAM_USER; - else if(!strcmp(myval,"tty")) - citem = PAM_TTY; - else if(!strcmp(myval,"rhost")) - citem = PAM_RHOST; - else if(!strcmp(myval,"ruser")) - citem = PAM_RUSER; - else { /* These items are related to the user, but are not - directly gettable with pam_get_item */ - citem = PAM_USER; - if(!strcmp(myval,"group")) - extitem = EI_GROUP; - else if(!strcmp(myval,"shell")) - extitem = EI_SHELL; - else - citem = 0; - } else if(!strcmp(mybuf,"apply")) { - apply_type=APPLY_TYPE_NONE; - if (myval[0]=='@') { - apply_type=APPLY_TYPE_GROUP; - strncpy(apply_val,myval+1,sizeof(apply_val)-1); - } else { - apply_type=APPLY_TYPE_USER; - strncpy(apply_val,myval,sizeof(apply_val)-1); - } - } else { - _pam_log(LOG_ERR,"Unknown option: %s",mybuf); - return onerr; - } - } - - if(!citem) { - _pam_log(LOG_ERR,"Unknown item or item not specified"); - return onerr; - } else if(!ifname) { - _pam_log(LOG_ERR,"List filename not specified"); - return onerr; - } else if(sense == 2) { - _pam_log(LOG_ERR,"Unknown sense or sense not specified"); - return onerr; - } else if( - (apply_type==APPLY_TYPE_NONE) || - ((apply_type!=APPLY_TYPE_NULL) && (*apply_val=='\0')) - ) { - _pam_log(LOG_ERR,"Invalid usage for apply= parameter"); - return onerr; - } - - /* Check if it makes sense to use the apply= parameter */ - if (apply_type != APPLY_TYPE_NULL) { - if((citem==PAM_USER) || (citem==PAM_RUSER)) { - _pam_log(LOG_WARNING,"Non-sense use for apply= parameter"); - apply_type=APPLY_TYPE_NULL; - } - if(extitem && (extitem==EI_GROUP)) { - _pam_log(LOG_WARNING,"Non-sense use for apply= parameter"); - apply_type=APPLY_TYPE_NULL; - } - } - - /* Short-circuit - test if this session apply for this user */ - { - const char *user_name; - int rval; - - rval=pam_get_user(pamh,&user_name,NULL); - if((rval==PAM_SUCCESS) && user_name[0]) { - /* Got it ? Valid ? */ - if(apply_type==APPLY_TYPE_USER) { - if(strcmp(user_name, apply_val)) { - /* Does not apply to this user */ -#ifdef DEBUG - _pam_log(LOG_DEBUG,"don't apply: apply=%s, user=%s", - apply_val,user_name); -#endif /* DEBUG */ - return PAM_IGNORE; - } - } else if(apply_type==APPLY_TYPE_GROUP) { - if(!is_on_group(user_name,apply_val)) { - /* Not a member of apply= group */ -#ifdef DEBUG - _pam_log(LOG_DEBUG,"don't apply: %s not a member of group %s", - user_name,apply_val); -#endif /* DEBUG */ - return PAM_IGNORE; - } - } - } - } - - retval = pam_get_item(pamh,citem,(const void **)&citemp); - if(retval != PAM_SUCCESS) { - return onerr; - } - if((citem == PAM_USER) && !citemp) { - pam_get_user(pamh,&citemp,NULL); - if (retval != PAM_SUCCESS) - return PAM_SERVICE_ERR; - } - - if(!citemp || (strlen(citemp) <= 0)) { - /* The item was NULL - we are sure not to match */ - return sense?PAM_SUCCESS:PAM_AUTH_ERR; - } - - if(extitem) { - switch(extitem) { - case EI_GROUP: - setpwent(); - userinfo = getpwnam(citemp); - setgrent(); - grpinfo = getgrgid(userinfo->pw_gid); - itemlist[0] = x_strdup(grpinfo->gr_name); - setgrent(); - for (i=1; (i < sizeof(itemlist)/sizeof(itemlist[0])-1) && - (grpinfo = getgrent()); ) { - if (is_on_list(grpinfo->gr_mem,citemp)) { - itemlist[i++] = x_strdup(grpinfo->gr_name); - } - } - itemlist[i] = NULL; - endgrent(); - endpwent(); - break; - case EI_SHELL: - setpwent(); - userinfo = getpwnam(citemp); /* Assume that we have already gotten - PAM_USER in pam_get_item() - a valid - assumption since citem gets set to - PAM_USER in the extitem switch */ - citemp = userinfo->pw_shell; - endpwent(); - break; - default: - _pam_log(LOG_ERR,"Internal weirdness, unknown extended item %d", - extitem); - return onerr; - } - } -#ifdef DEBUG - _pam_log(LOG_INFO,"Got file = %s, item = %d, value = %s, sense = %d", - ifname, citem, citemp, sense); -#endif - if(lstat(ifname,&fileinfo)) { - _pam_log(LOG_ERR, - "Couldn't open %s",ifname); - return onerr; - } - - if((fileinfo.st_mode & S_IWOTH) - || !S_ISREG(fileinfo.st_mode)) { - /* If the file is world writable or is not a - normal file, return error */ - _pam_log(LOG_ERR, - "%s is either world writable or not a normal file", - ifname); - return PAM_AUTH_ERR; - } - - inf = fopen(ifname,"r"); - if(inf == NULL) { /* Check that we opened it successfully */ - if (onerr == PAM_SERVICE_ERR) { - /* Only report if it's an error... */ - _pam_log(LOG_ERR, "Error opening %s", ifname); - } - return onerr; - } - /* There should be no more errors from here on */ - retval=PAM_AUTH_ERR; - /* This loop assumes that PAM_SUCCESS == 0 - and PAM_AUTH_ERR != 0 */ -#ifdef DEBUG - assert(PAM_SUCCESS == 0); - assert(PAM_AUTH_ERR != 0); -#endif - if(extitem == EI_GROUP) { - while((fgets(aline,255,inf) != NULL) - && retval) { - if(aline[strlen(aline) - 1] == '\n') - aline[strlen(aline) - 1] = '\0'; - for(i=0;itemlist[i];) - /* If any of the items match, strcmp() == 0, and we get out - of this loop */ - retval = (strcmp(aline,itemlist[i++]) && retval); - } - for(i=0;itemlist[i];) - free(itemlist[i++]); - } else { - while((fgets(aline,255,inf) != NULL) - && retval) { - if(aline[strlen(aline) - 1] == '\n') - aline[strlen(aline) - 1] = '\0'; - retval = strcmp(aline,citemp); - } - } - fclose(inf); - free(ifname); - if(retval) { -#ifdef DEBUG - syslog(LOG_INFO,"Returning %d, retval = %d", - sense?PAM_AUTH_ERR:PAM_SUCCESS, retval); -#endif - return sense?PAM_SUCCESS:PAM_AUTH_ERR; - } - else { -#ifdef DEBUG - syslog(LOG_INFO,"Returning %d, retval = %d", - sense?PAM_SUCCESS:PAM_AUTH_ERR, retval); -#endif - return sense?PAM_AUTH_ERR:PAM_SUCCESS; - } -} - -PAM_EXTERN -int pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv) -{ - return PAM_SUCCESS; -} - -#ifdef PAM_STATIC - -/* static module data */ - -struct pam_module _pam_listfile_modstruct = { - "pam_listfile", - pam_sm_authenticate, - pam_sm_setcred, - NULL, - NULL, - NULL, - NULL, -}; - -#endif - -/* end of module definition */ - |