pax_global_header00006660000000000000000000000064123044177100014511gustar00rootroot0000000000000052 comment=32ff186d2a3fbf3b924d79de55ecbe97d1ab26f8 .bzrignore000066400000000000000000000003151230441771000130560ustar00rootroot00000000000000Makefile.settings autom4te.cache config.log config.status configure tags build-stamp debian/files debian/libpam-krb5-migrate-heimdal.substvars debian/libpam-krb5-migrate-heimdal configure-stamp aclocal.m4 CHANGELOG000066400000000000000000000032501230441771000122670ustar00rootroot00000000000000Version 0.0.11 1 Mar 2014 - various improvements to allow easier build flag overriding. Version 0.0.10 15 Sep 2011 - cope with kadm5_free_policy_ent having a different number of arguments in Heimdal. - cope with kadm5_init_with_skey having a different number of arguments in MIT Kerberos. - support kadm_err.h header used by MIT in addition to kadm5_err.h. - allow overriding KRB5CONFIG environment variable, useful when there are multiple Kerberos versions on the system. Version 0.0.9 30 Jul 2009 - fix syntax errors in man pages. - link against com_err to avoid unresolved symbols - use cc for linking rather than ld. Version 0.0.8 30 Nov 2007 - fix build with newer versions of Heimdal. Version 0.0.7 13 Sep 2007 - fix include of sys/syslog.h verison 0.0.6 27 Apr 2007 - switch to autoconf - fixed crash bug when used with Heimdal Kerberos version 0.0.5 13 Nov 2006 - new maintainer (Jelmer Vernooij ) - add manual page - fix build with heimdal Kerberos - use krb5-config utility for determining CFLAGS and LIBS version 0.0.4 25 Oct 2002 - provide stub symbol kdb2_dbopen, which recent versions of libkdb5 expect the application to provide (possibly a bug) version 0.0.3 11 Sep 2001 - make sure we use the DEFAULT_KEYTAB define, since we have it available. - add support for min_uid option, submitted by Gordon Tetlow version 0.0.2 26 Apr 2001 - fix bug in cleanup handling; now that we're passing in the right kind of void pointer, we shouldn't be leaving temp files around any more. - fixed typo to the default principal name in the INSTALL file. COPYING000066400000000000000000000430761230441771000121220ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. 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It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. INSTALL000066400000000000000000000066601230441771000121160ustar00rootroot00000000000000BUILDING AND INSTALLATION There are two different ways to build pam_krb5_migrate. The first mode generates a module which will update a Kerberos database on the local machine; the second mode generates a module which updates against a remote KDC using the Kerberos5 kadmin protocol. Ideally, I would like to combine both sets of functionality in a single binary; however, the client and server kadmin libraries export the same API, and ld doesn't like using two different functions of the same name. :) If anybody knows of a good, portable way to do this, let me know. The default is to use the kadmin protocol to talk to the KDC remotely. If you need the local option, edit the Makefile and uncomment the LIBS and KLOCAL lines near the top, commenting out the settings for the remote option. At a later date, you will be able to control this using a configure script. Alternatively, if people think that it would be useful, I may have it build both types of module under different names. This is an alpha release, and I'm always open to suggestion. After editing the makefile, run 'make all install' to build the module and install it in /lib/security/. SETTING UP THE PAM_KRB5_MIGRATE MODULE If you do not already have a KDC, you will need to set up a Kerberos database for your realm. See the Kerberos V5 Installation Guide for details. If you will be updating against a live database from a machine other than the KDC, or if you intend to run the migration module on more than one machine at a time, you will need to use kadmin (or kadmin.local) to create a special Kerberos principal called pam_migrate/, where is the full domain name (FQDN) of the host where you're deploying the pam module. % kadmin.local Authenticating as principal admin/admin@REALM with password. kadmin.local: addprinc -randkey pam_migrate/hostname@REALM WARNING: no policy specified for pam_migrate/hostname@REALM; defaulting to no policy Principal "pam_migrate/hostname@REALM" created. Then extract the key for this principal to a keytab for use on the host: kadmin.local: ktadd -k /var/kerberos/krb5kdc/hostname.keytab pam_migrate/hostname Entry for principal pam_migrate/hostname with kvno 4, encryption type DES cbc mode with CRC-32 added to keytab WRFILE:/var/kerberos/krb5kdc/hostname.keytab. Entry for principal pam_migrate/hostname with kvno 4, encryption type Triple DES cbc mode raw added to keytab WRFILE:/var/kerberos/krb5kdc/hostname.keytab. This principal should *only* have permission to add principals to the database and should have no other permissions. To give the principal permission to add to the database, add this line to the top of your kadm5.acl file: pam_migrate/hostname@REALM a You can also give all principals of the form pam_migrate/ permission to add by using the line pam_migrate/*@REALM a You will then need to copy your new keytab (securely!) to the appropriate machine and install it as /etc/security/pam_krb5.keytab. Like all keytabs, this file should be readable only by root and should be treated with the utmost care when transferring it to the destination host. *Anyone with access to this keytab will be able to create new Kerberos principals in your realm.* If you plan to add principals to a local database, you won't need to do any of the above. So long as the pam module has access to write to the database (generally only if the calling application runs as root), you will be able to edit without authentication. Makefile000066400000000000000000000020331230441771000125130ustar00rootroot00000000000000include Makefile.settings LDFLAGS += -Wl,-Bsymbolic -Wl,-x -shared CFLAGS += `$(KRB5CONFIG) --cflags krb5 kadm-client` CFLAGS += $(COM_ERR_CFLAGS) CFLAGS += -fPIC # Uncomment these lines to build the module with local db support. #KLOCAL = -DKADMIN_LOCAL #LIBS = -lkadm5srv # Uncomment these lines to build the module with remote kadmin support. KLOCAL = LIBS += `$(KRB5CONFIG) --libs krb5 kadm-client` LIBS += $(COM_ERR_LIBS) LIBS += -lc all: pam_krb5_migrate.so pam_krb5_migrate.so: pam_krb5_migrate.o $(CC) -Wl,-z,defs $(LDFLAGS) -o pam_krb5_migrate.so \ pam_krb5_migrate.o $(LIBS) pam_krb5_migrate.o: pam_krb5_migrate.c $(CC) -o $@ -c $< $(KLOCAL) $(CFLAGS) $(DEFS) check:: install: all install -d $(DESTDIR)/lib/security install -d $(DESTDIR)$(mandir)/man7 install -m755 -o root pam_krb5_migrate.so $(DESTDIR)/lib/security/ install -m0644 -o root pam_krb5_migrate.7 $(DESTDIR)$(mandir)/man7 ctags: ctags -R . clean: rm -f *.o *.so test distclean:: clean rm -rf autom4te.cache config.log config.status Makefile.settings Makefile.settings.in000066400000000000000000000003461230441771000147640ustar00rootroot00000000000000CC = @CC@ CFLAGS = @CFLAGS@ DEFS = @DEFS@ LIBS = @LIBS@ LDFLAGS = @LDFLAGS@ KRB5CONFIG = @KRB5CONFIG@ COM_ERR_CFLAGS = @COM_ERR_CFLAGS@ COM_ERR_LIBS = @COM_ERR_LIBS@ prefix = @prefix@ datarootdir = @datarootdir@ mandir = @mandir@ README000066400000000000000000000024661230441771000117450ustar00rootroot00000000000000pam_krb5_migrate is a stackable authentication module that takes a username and password from an earlier module in the stack, and attempts to transparently add them to a Kerberos realm using the Kerberos 5 kadmin service. The module can be used to ease the administrative burdens of migrating a large installed userbase from pre-existing authentication methods to a Kerberos-based setup. The most current version of this module can always be found at http://samba.org/~jelmer/pam_krb5_migrate For sample usage in a module stack, see the enclosed login.pam file. The following options are recognized by the module: debug turn debug logging on keytab= use alternate keytab for authentication (default is /etc/security/pam_krb5.keytab) min_uid= don't add principals for uid's lower than . (default is 100) principal= use the key for instead of the default pam_migrate/ key realm= update the database for a realm other than the default realm. pam_krb5_migrate was written by Steve Langasek . Please send questions and comments (and especially bugfixes) to the current maintainer, Jelmer Vernooij . TODO000066400000000000000000000003411230441771000115430ustar00rootroot00000000000000- update to work with vanilla mit kerberos - add testsuite - bootstrap a KDC somehow? Would be nice if heimdal had a way to build a KDC using a simple command. - use a simple implementation that unit tests using check configure.ac000066400000000000000000000021611230441771000133430ustar00rootroot00000000000000AC_INIT(pam-krb5-migrate, 0.0.11, [jelmer@samba.org]) AC_PROG_CC AC_ARG_VAR(KRB5CONFIG, [Path to krb5-config script]) AC_PATH_PROGS(KRB5CONFIG, $ac_cv_env_KRB5CONFIG_value krb5-config krb5-config.heimdal) AC_CHECK_LIB(pam, pam_get_item, [], [AC_MSG_ERROR([pam not found])]) save_LIBS="$LIBS" save_CFLAGS="$CFLAGS" LIBS="$LIBS `$ac_cv_path_KRB5CONFIG --libs kadm-client`" CFLAGS="$CFLAGS `$ac_cv_path_KRB5CONFIG --cflags kadm-client`" AC_CHECK_FUNCS(kadm5_get_policy) PKG_CHECK_MODULES(COM_ERR, com_err) AC_CHECK_HEADERS(kadm5/kadm_err.h) AC_COMPILE_CHECK([number of arguments to kadm5_free_policy_ent], [ #include #include #include ], [ kadm5_free_policy_ent(NULL); ], [ AC_MSG_RESULT(1) AC_DEFINE(KADM5_FREE_POLICY_ENT_1_ARG)], [ AC_MSG_RESULT(2) ] ) AC_COMPILE_CHECK([number of arguments to kadm5_init_with_skey], [ #include #include #include ], [ kadm5_init_with_skey(NULL, NULL, NULL, NULL, NULL, NULL, NULL); ], [ AC_MSG_RESULT(7) AC_DEFINE(KADM5_INIT_WITH_SKEY_7_ARGS)], [ AC_MSG_RESULT(9) ]) LIBS="$save_LIBS" AC_CONFIG_FILES([Makefile.settings]) AC_OUTPUT login.pam000066400000000000000000000014421230441771000126650ustar00rootroot00000000000000#%PAM-1.0 # Sample login configuration file for Linux-PAM, using krb5_migrate # For equivalent Solaris config, put the service name at the beginning # of the line and add to /etc/pam.conf. auth required /lib/security/pam_securetty.so auth required /lib/security/pam_nologin.so auth sufficient /lib/security/pam_krb5.so auth requisite /lib/security/pam_unix.so auth optional /lib/security/pam_krb5_migrate.so account required /lib/security/pam_unix.so password required /lib/security/pam_cracklib.so password required /lib/security/pam_unix.so shadow nullok use_authtok password optional /lib/security/pam_krb5.so use_authtok use_first_pass session required /lib/security/pam_unix.so pam_krb5_migrate.7000066400000000000000000000024641230441771000143630ustar00rootroot00000000000000.TH pam_krb5_migrate 7 "13 November 2006" .SH NAME pam_krb5_migrate \- Kerberos 5 Migration PAM module .SH SYNOPSIS auth optional pam_krb5_migrate.so .SH DESCRIPTION .PP .BR pam_krb5_migrate is a stackable authentication module that takes a username and password from an earlier module in the stack, and attempts to transparently add them to a Kerberos realm using the Kerberos 5 kadmin service. .PP The module can be used to ease the administrative burdens of migrating a large installed userbase from pre-existing authentication methods to a Kerberos-based setup. .SH OPTIONS The following options may be passed to the authentication module: .TP 15 .B debug .BR syslog (3) debugging information at .SB LOG_DEBUG level. .TP .B keytab= use alternate keytab for authentication (default is /etc/security/pam_krb5.keytab). .TP .B min_uid= don't add principals for uids lower than . (default is 100) .TP .B principal= use the key for instead of the default pam_migrate/ key .TP .B realm= update the database for a realm other than the default realm. .SH AUTHOR pam_krb5_migrate was written by Steve Langasek . This manpage was assembled by Jelmer Vernooij . .SH SEE ALSO .BR kadmin (1), .BR pam_krb5 (5), .BR pam (3), .BR libpam (4). pam_krb5_migrate.c000066400000000000000000000347361230441771000144460ustar00rootroot00000000000000/* Kerberos 5 migration module PAM authentication module to transparently add passwords to a Kerberos 5 database. Copyright (C) Steve Langasek 2000-2001 Copyright (C) Jelmer Vernooij 2006 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * TODO: * nullok, nonull options. One may not want to add a principal * to a kerberos db with a null password. */ /* indicate the following groups are defined */ #define PAM_SM_AUTH #include "pam_krb5_migrate.h" #define DEFAULT_KEYTAB "/etc/security/pam_krb5.keytab" #define MIN_UID 100 /* Stub symbol, never used, that's needed when dlopen()ing libkdb5.so. */ void kdb2_dbopen() { } /* Cleanup function for pam data. */ static void _cleanup(pam_handle_t * pamh, void *x, int error_status) { if(x) free(x); x = NULL; } /* syslogging function for errors and other information */ static void _log_err(int err, pam_handle_t *pamh, const char *format, ...) { char *service = NULL; char logname[1024]; va_list args; pam_get_item(pamh, PAM_SERVICE, (const void **) &service); if (service) { snprintf(logname, sizeof(logname) - 1, "%s(pam_krb5_migrate)", service); } else { snprintf(logname, sizeof(logname) - 1, "pam_krb5_migrate"); } va_start(args, format); openlog(logname, LOG_CONS | LOG_PID, LOG_AUTH); vsyslog(err, format, args); va_end(args); closelog(); } /* * Safe duplication of character strings, leaving * no evidence for later stack analysis. */ static char * _xstrdup(pam_handle_t *pamh, const char *x) { register char *new = NULL; if (x != NULL) { register int i; for (i = 0; x[i]; ++i); /* length of string */ if ((new = malloc(++i)) == NULL) { i = 0; _log_err(LOG_CRIT, pamh, "out of memory in _xstrdup"); } else { while (i-- > 0) { new[i] = x[i]; } } x = NULL; } return new; /* return the duplicate or NULL on error */ } /* this is a front-end for module-application conversations */ static int converse(pam_handle_t * pamh, int debug, int nargs, struct pam_message **message, struct pam_response **response) { int retval; struct pam_conv *conv; retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv); if (retval == PAM_SUCCESS) { retval = conv->conv(nargs, (const struct pam_message **) message , response, conv->appdata_ptr); if (retval != PAM_SUCCESS && debug) { _log_err(LOG_DEBUG, pamh, "conversation failure [%s]", pam_strerror(pamh, retval)); } } else { _log_err(LOG_ERR, pamh, "couldn't obtain coversation function [%s]", pam_strerror(pamh, retval)); } return retval; /* propagate error status */ } static int make_remark(pam_handle_t * pamh, int debug, int type, const char *text) { struct pam_message *pmsg[1], msg[1]; struct pam_response *resp; pmsg[0] = &msg[0]; msg[0].msg = text; msg[0].msg_style = type; resp = NULL; return converse(pamh, debug, 1, pmsg, &resp); return PAM_SUCCESS; } /* * pam_sm_authenticate() takes an authentication token and stores * it to a Kerberos database using the kadmin API. * */ int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv) { int retval, *ret_data = NULL; int debug = 0, quiet = flags & PAM_SILENT; #ifndef KADMIN_LOCAL int local = 1, remote = 1; #endif char *def_realm = NULL; char *cp; char *name = NULL, *pass = NULL; const char *lname = NULL; char *princstr = NULL, *keytab_name = NULL; kadm5_ret_t kret; krb5_context context; krb5_principal princ; kadm5_principal_ent_rec newprinc; kadm5_config_params params; kadm5_policy_ent_rec defpol; long mask = 0; void *handle = NULL; uid_t min_uid = MIN_UID; struct passwd *pwent = NULL; /* Get a few bytes so we can pass our return value to pam_sm_setcred(). */ ret_data = malloc(sizeof(int)); /* Initialize the params struct for kadmin. */ memset((char *) ¶ms, 0, sizeof(params)); if ((kret = krb5_init_context(&context))) { _log_err(LOG_ERR, pamh, "%s while initializing krb5 library", error_message(kret)); retval = PAM_SYSTEM_ERR; goto cleanup; } while (argc--) { if (!strncmp(*argv, "debug", 5)) { debug = 1; #ifndef KADMIN_LOCAL } else if (!strncmp(*argv, "keytab=", 7)) { keytab_name = _xstrdup(pamh, *argv+7); if (keytab_name == NULL) { retval = PAM_BUF_ERR; goto cleanup; } #else } else if (!strncmp(*argv, "keytab=", 7)) { _log_err(LOG_NOTICE, pamh, "module compiled with local database support," "ignoring option %s", *argv); #endif } else if (!strncmp(*argv, "principal=", 10)) { princstr = _xstrdup(pamh, *argv+10); if (princstr == NULL) { retval = PAM_BUF_ERR; goto cleanup; } } else if (!strncmp(*argv, "realm=", 6)) { def_realm = _xstrdup(pamh, *argv+6); if (def_realm == NULL) { retval = PAM_BUF_ERR; goto cleanup; } } else if (!strncmp(*argv, "min_uid=", 8)) { min_uid = atoi(*argv+8); } else { _log_err(LOG_ERR, pamh, "unrecognized option [%s]", *argv); retval = PAM_SYSTEM_ERR; goto cleanup; } ++argv; } /* Even if connected locally, we need a realm so we can properly build principal names. */ if (def_realm == NULL && krb5_get_default_realm(context, &def_realm)) { _log_err(LOG_ERR, pamh, "unable to get default realm"); if(!quiet) { make_remark(pamh, debug, PAM_ERROR_MSG, "unable to get default Kerberos realm"); } retval = PAM_SYSTEM_ERR; goto cleanup; } params.mask |= KADM5_CONFIG_REALM; params.realm = def_realm; /* * If no principal name is specified, the principal name is * pam_migrate/hostname. */ if (princstr == NULL) { /* We want a principal using the service name (pam_migrate) and the hostname. */ if ((kret = krb5_sname_to_principal(context, NULL, "pam_migrate", KRB5_NT_SRV_HST, &princ))) { _log_err(LOG_ERR, pamh, "%s creating host service principal", error_message(kret)); retval = PAM_SYSTEM_ERR; goto cleanup; } /* Can we extract a string from the result? */ if ((kret = krb5_unparse_name(context, princ, &princstr))) { _log_err(LOG_ERR, pamh, "%s while canonicalizing principal name", error_message(kret)); krb5_free_principal(context, princ); retval = PAM_SYSTEM_ERR; goto cleanup; } /* Done with it either way */ krb5_free_principal(context, princ); } /* * Initialize the kadm5 connection. Either we're running in local * mode, in which case anything goes; or we need a keytab. */ #ifndef KADMIN_LOCAL /* Get default keytab if none was provided. */ if (!keytab_name) { keytab_name = _xstrdup(pamh, DEFAULT_KEYTAB); if (keytab_name == NULL) { retval = PAM_BUF_ERR; goto cleanup; } } if (debug) { _log_err(LOG_DEBUG, pamh, "Authenticating as principal %s with keytab %s.\n", princstr, keytab_name); } #endif #ifdef KADM5_INIT_WITH_SKEY_7_ARGS kret = kadm5_init_with_skey(princstr, keytab_name, KADM5_ADMIN_SERVICE, ¶ms, KADM5_STRUCT_VERSION, KADM5_API_VERSION_2, &handle); #else kret = kadm5_init_with_skey(context, princstr, keytab_name, KADM5_ADMIN_SERVICE, ¶ms, KADM5_STRUCT_VERSION, KADM5_API_VERSION_2, NULL, &handle); #endif free(princstr); princstr = NULL; if (kret) { _log_err(LOG_ERR, pamh, "%s while initializing kadmin interface", error_message(kret)); retval = PAM_SYSTEM_ERR; goto cleanup; } /* Everything is in order. Get our username and our realm, and add the principal. */ /* get the username */ retval = pam_get_user(pamh, &lname, "Username: "); if (retval != PAM_SUCCESS) { if (debug) { _log_err(LOG_DEBUG, pamh, "could not identify user"); } goto cleanup; } if (debug) { _log_err(LOG_DEBUG, pamh, "username [%s] obtained", lname); } pwent = getpwnam(lname); if (pwent != NULL && pwent->pw_uid < min_uid) { if (debug) { _log_err(LOG_DEBUG, pamh, "username [%s] has uid less than %d, not creating a principal", lname, min_uid); } retval = PAM_IGNORE; goto cleanup; } name = malloc(strlen(lname) + strlen(def_realm) + 2); if (name == NULL) { _log_err(LOG_CRIT, pamh, "no memory for principal name"); retval = PAM_BUF_ERR; goto cleanup; } strncpy(name, lname, strlen(lname) + 1); /* Make sure we're dealing with a valid username. */ if ((cp = strchr(name, '@'))) { *cp = '\0'; } if ((cp = strchr(name, '/'))) { *cp = '\0'; } /* Tack on the @REALM portion of the principal name. */ strncat(name, "@", 2); strncat(name, def_realm, strlen(def_realm) + 1); /* Get the authtok; if we don't have one, silently fail. */ retval = pam_get_item(pamh, PAM_AUTHTOK, (const void **)&pass); if (retval != PAM_SUCCESS) { _log_err(LOG_ALERT, pamh, "pam_get_item returned error to pam_sm_authenticate"); retval = PAM_AUTHTOK_RECOVER_ERR; goto cleanup; } else if (pass == NULL) { retval = PAM_AUTHTOK_RECOVER_ERR; goto cleanup; } /* Zero all fields in request structure */ memset(&newprinc, 0, sizeof(newprinc)); newprinc.attributes = 0; kret = krb5_parse_name(context, name, &newprinc.principal); if (kret) { _log_err(LOG_ERR, pamh, "%s while setting up principal \"%s\"", error_message(kret), name); krb5_free_principal(context, newprinc.principal); retval = PAM_SYSTEM_ERR; goto cleanup; } #ifdef HAVE_KADM5_GET_POLICY if (!kadm5_get_policy(handle, "default", &defpol)) { if (debug) { _log_err(LOG_DEBUG, pamh, "no policy specified for %s; assigning \"default\"", name); } newprinc.policy = "default"; mask |= KADM5_POLICY; #if KADM5_FREE_POLICY_ENT_1_ARG (void) kadm5_free_policy_ent(&defpol); #else (void) kadm5_free_policy_ent(handle, &defpol); #endif } else { if (debug) { _log_err(LOG_DEBUG, pamh, "no policy specified for %s; defaulting to no policy", name); } } #endif mask &= ~KADM5_POLICY_CLR; mask |= KADM5_PRINCIPAL; kret = kadm5_create_principal(handle, &newprinc, mask, pass); /* TODO: some errors are more noteworthy than others. */ if (kret && kret != KADM5_DUP) { // No need to log that the // principal is already there. if (!quiet) make_remark(pamh, debug, PAM_ERROR_MSG, error_message(kret)); _log_err(LOG_NOTICE, pamh, "%s creating principal \"%s\"", error_message(kret), name); krb5_free_principal(context, newprinc.principal); retval = PAM_IGNORE; goto cleanup; } else if (kret && debug) { _log_err(LOG_DEBUG, pamh, "principal %s already exists, continuing", name); } krb5_free_principal(context, newprinc.principal); if (debug && !kret) { _log_err(LOG_NOTICE, pamh, "Principal \"%s\" created", name); } /* return PAM_IGNORE, so that we don't affect the authentication stack. */ retval = PAM_IGNORE; cleanup: kadm5_flush(handle); kadm5_destroy(handle); krb5_free_context(context); if (princstr) free(princstr); if (def_realm) free(def_realm); if (keytab_name) free(keytab_name); if (name) free(name); if (ret_data) { *ret_data = retval; pam_set_data(pamh, "krb5_migrate_return", (void *) ret_data, _cleanup); } return retval; } /* * pam_sm_setcred: stub function. We have no credentials to set, * so we just return a value to match pam_sm_authenticate. */ int pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv) { int retval, *pretval = NULL; retval = PAM_SUCCESS; /* Retrieve the previous return value. */ pam_get_data(pamh, "krb5_migrate_return", (const void **) &pretval); /* Copy the return value to local memory. */ if(pretval) { retval = *pretval; } /* Trigger the cleanup function. */ pam_set_data(pamh, "krb5_migrate_return", NULL, NULL); return retval; } /* static module data */ #ifdef PAM_STATIC struct pam_module _pam_krb5_migrate_auth_modstruct = { "pam_krb5_migrate", pam_sm_authenticate, pam_sm_setcred, NULL, NULL, NULL, NULL }; #endif pam_krb5_migrate.h000066400000000000000000000025771230441771000144510ustar00rootroot00000000000000/* Kerberos 5 migration module Version 0.0.3. PAM authentication module to transparently add passwords to a Kerberos 5 database. Copyright (C) Steve Langasek 2000-2001 Copyright (C) Jelmer Vernooij 2006 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _PAM_KRB5_MIGRATE_H #define _PAM_KRB5_MIGRATE_H #include #include #include #include #include #include #include #ifdef HAVE_KADM5_KADM_ERR_H #include #else #include #endif #ifndef LINUX /* This is only used in the Sun implementation. */ #include #endif /* LINUX */ #include #endif /* _PAM_KRB5_MIGRATE_H */