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* pam_unix: enclose macro argumentsChristian Göttsche2024-01-151-3/+3
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* modules: make use of secure memory erasureChristian Göttsche2023-02-281-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | Use empty initialization of structs to minimize the memset() usage, to reduce the amount of calls which are not sensitive. Non trivial changes: - pam_env: * erase environment variables where possible - pam_exec: * erase responce on error * erase auth token - pam_pwhistory: * erase buffers containing old passwords - pam_selinux: skip overwriting data structure consisting of only pointers to insensitive data, which also gets free'd afterwards (so it currently does not protect against double-free or use-after-free on the member pointers) - pam_unix: erase cipher data in more places - pam_userdb: erase password hashes
* pam_unix: add nullresetok option to allow reset blank passwordsPavel Březina2020-02-181-1/+6
| | | | | | | | | | Adding nullresetok to auth phase of pam_unix module will allow users with blank password to authenticate in order to immediatelly change their password even if nullok is not set. This allows to have blank password authentication disabled but still allows administrator to create new user accounts with expired blank password that must be change on the first login.
* Revert "pam_unix: Add crypt_default method, if supported."Tomas Mraz2018-11-271-12/+10
| | | | This reverts commit ad435b386b22b456724dc5c5b8d9f2d1beffc558.
* pam_unix: Add crypt_default method, if supported.Björn Esser2018-11-271-10/+12
| | | | | | | | | | | | libxcrypt since v4.4.0 supports a default method for its gensalt function on most system configurations. As the default method is to be considered the strongest available hash method, it should be preferred over all other hash methods supported by pam. * modules/pam_unix/pam_unix.8.xml: Documentation for crypt_default. * modules/pam_unix/passverify.c: Add crypt_default method. * modules/pam_unix/support.h: Likewise.
* pam_unix: Add support for (gost-)yescrypt hashing methods.Björn Esser2018-11-231-47/+54
| | | | | | | | | | | | | | | libxcrypt (v4.2 and later) has added support for the yescrypt hashing method; gost-yescrypt has been added in v4.3. * modules/pam_unix/pam_unix.8.xml: Documentation for (gost-)yescrypt. * modules/pam_unix/pam_unix_acct.c: Use 64 bit type for control flags. * modules/pam_unix/pam_unix_auth.c: Likewise. * modules/pam_unix/pam_unix_passwd.c: Likewise. * modules/pam_unix/pam_unix_sess.c: Likewise. * modules/pam_unix/passverify.c: Add support for (gost-)yescrypt. * modules/pam_unix/passverify.h: Use 64 bit type for control flags. * modules/pam_unix/support.c: Set sane rounds for (gost-)yescrypt. * modules/pam_unix/support.h: Add support for (gost-)yescrypt.
* pam_unix: remove obsolete _unix_read_password prototypeDmitry V. Levin2018-05-311-7/+0
| | | | | | | | | | The function was removed by commit Linux-PAM-1.3.0~5 so the function prototype should go as well. * modules/pam_unix/support.h (_unix_read_password): Remove. Complements: 7e09188c5dc4 ("pam_unix: Use pam_get_authtok() instead of direct pam_prompt() calls.")
* pam_unix: Use pam_get_authtok() instead of direct pam_prompt() calls.Tomas Mraz2016-04-061-4/+2
| | | | | | | | | | | | | | | | We have to drop support for not_set_pass option which is not much useful anyway. Instead we get proper support for authtok_type option. * modules/pam_unix/pam_unix.8.xml: Removed not_set_pass option, added authtok_ty pe option. * modules/pam_unix/pam_unix_auth.c (pam_sm_authenticate): Replace _unix_read_pas sword() call with equivalent pam_get_authtok() call. * modules/pam_unix/pam_unix_passwd.c (pam_sm_chauthtok): Likewise and also drop support for not_set_pass. * modules/pam_unix/support.c (_unix_read_password): Remove. * modules/pam_unix/support.h: Remove UNIX_NOT_SET_PASS add UNIX_AUTHTOK_TYPE.
* pam_unix: Add no_pass_expiry option to ignore password expiration.Tomas Mraz2016-02-171-2/+4
| | | | | | | | | | | | * modules/pam_unix/pam_unix.8.xml: Document the no_pass_expiry option. * modules/pam_unix/pam_unix_acct.c (pam_sm_acct_mgmt): If no_pass_expiry is on and return value data is not set to PAM_SUCCESS then ignore PAM_NEW_AUTHTOK_REQD and PAM_AUTHTOK_EXPIRED returns. * modules/pam_unix/pam_unix_auth.c (pam_sm_authenticate): Always set the return value data. (pam_sm_setcred): Test for likeauth option and use the return value data only if set. * modules/pam_unix/support.h: Add the no_pass_expiry option.
* Add "quiet" option to pam_unix to suppress informential infoThorsten Kukuk2015-04-231-2/+4
| | | | | | | | | messages from session. * modules/pam_unix/pam_unix.8.xml: Document new option. * modules/pam_unix/support.h: Add quiet option. * modules/pam_unix/pam_unix_sess.c: Don't print LOG_INFO messages if 'quiet' option is set.
* Introduce pam_modutil_sanitize_helper_fdsDmitry V. Levin2014-01-271-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change introduces pam_modutil_sanitize_helper_fds - a new function that redirects standard descriptors and closes all other descriptors. pam_modutil_sanitize_helper_fds supports three types of input and output redirection: - PAM_MODUTIL_IGNORE_FD: do not redirect at all. - PAM_MODUTIL_PIPE_FD: redirect to a pipe. For stdin, it is implemented by creating a pipe, closing its write end, and redirecting stdin to its read end. Likewise, for stdout/stderr it is implemented by creating a pipe, closing its read end, and redirecting to its write end. Unlike stdin redirection, stdout/stderr redirection to a pipe has a side effect that a process writing to such descriptor should be prepared to handle SIGPIPE appropriately. - PAM_MODUTIL_NULL_FD: redirect to /dev/null. For stdin, it is implemented via PAM_MODUTIL_PIPE_FD because there is no functional difference. For stdout/stderr, it is classic redirection to /dev/null. PAM_MODUTIL_PIPE_FD is usually more suitable due to linux kernel security restrictions, but when the helper process might be writing to the corresponding descriptor and termination of the helper process by SIGPIPE is not desirable, one should choose PAM_MODUTIL_NULL_FD. * libpam/pam_modutil_sanitize.c: New file. * libpam/Makefile.am (libpam_la_SOURCES): Add it. * libpam/include/security/pam_modutil.h (pam_modutil_redirect_fd, pam_modutil_sanitize_helper_fds): New declarations. * libpam/libpam.map (LIBPAM_MODUTIL_1.1.9): New interface. * modules/pam_exec/pam_exec.c (call_exec): Use pam_modutil_sanitize_helper_fds. * modules/pam_mkhomedir/pam_mkhomedir.c (create_homedir): Likewise. * modules/pam_unix/pam_unix_acct.c (_unix_run_verify_binary): Likewise. * modules/pam_unix/pam_unix_passwd.c (_unix_run_update_binary): Likewise. * modules/pam_unix/support.c (_unix_run_helper_binary): Likewise. * modules/pam_xauth/pam_xauth.c (run_coprocess): Likewise. * modules/pam_unix/support.h (MAX_FD_NO): Remove.
* Allow DES as compatibility option for /etc/login.defsThorsten Kukuk2013-11-081-1/+3
| | | | * modules/pam_unix/support.h: Add UNIX_DES
* Use hash from /etc/login.defs as default if noThorsten Kukuk2013-06-181-28/+35
| | | | | | | | | other one is specified as argument. * modules/pam_unix/support.c: Add search_key, call from __set_ctrl * modules/pam_unix/support.h: Add define for /etc/login.defs * modules/pam_unix/pam_unix.8.xml: Document new behavior. * modules/pam_umask/pam_umask.c: Add missing NULL pointer check
* Relevant BUGIDs:Thorsten Kukuk2010-08-171-3/+7
| | | | | | | | | | | | | | | | | | | | | Purpose of commit: new feature Commit summary: --------------- 2010-08-17 Thorsten Kukuk <kukuk@thkukuk.de> * modules/pam_unix/pam_unix_passwd.c: Implement minlen option. * modules/pam_unix/support.c: Likewise. * modules/pam_unix/support.h: Likewise. * modules/pam_unix/pam_unix_acct.c (pam_sm_acct_mgmt): Adjust arguments for _set_ctrl call. * modules/pam_unix/pam_unix_auth.c (pam_sm_authenticate): Likewise. * modules/pam_unix/pam_unix_session.c: Likewise. * modules/pam_unix/pam_unix.8.xml: Document minlen option. Based on patch by Steve Langasek.
* Relevant BUGIDs:Tomas Mraz2008-12-011-5/+5
| | | | | | | | | | | Purpose of commit: bugfix Commit summary: --------------- 2008-12-01 Tomas Mraz <t8m@centrum.cz> * modules/pam_unix/support.h: Fix masks for cipher algorithm flags.
* Relevant BUGIDs:Thorsten Kukuk2008-12-011-1/+3
| | | | | | | | | | | | | | | | | | | | | | Purpose of commit: new feature Commit summary: --------------- 2008-12-01 Thorsten Kukuk <kukuk@thkukuk.de> * modules/pam_unix/pam_unix.8.xml: Document blowfish option. * configure.in: Check for crypt_gensalt_rn. * modules/pam_unix/pam_unix_passwd.c: Pass pamh to create_password_hash function. * modules/pam_unix/passverify.c (create_password_hash): Add blowfish support. * modules/pam_unix/passverify.h: Adjust create_password_hash prototype. * modules/pam_unix/support.c: Add support for blowfish option. * modules/pam_unix/support.h: Add defines for blowfish option. Patch from Diego Flameeyes Pettenò <flameeyes@gmail.com>
* Relevant BUGIDs: #2009766Tomas Mraz2008-07-111-1/+1
| | | | | | | | | | | | | | | | Purpose of commit: bugfix Commit summary: --------------- 2008-07-11 Tomas Mraz <t8m@centrum.cz> * modules/pam_unix/pam_unix_acct.c (_unix_run_verify_binary): Do not close the pipe descriptor in borderline case (#2009766) * modules/pam_unix/pam_unix_passwd.c (_unix_run_update_binary): Likewise. * modules/pam_unix/support.c (_unix_run_helper_binary): Likewise. * modules/pam_unix/support.h: Define upper limit of fds we will attempt to close.
* Relevant BUGIDs:Tomas Mraz2008-01-231-4/+12
| | | | | | | | | | Purpose of commit: cleanup, new feature Commit summary: --------------- Merging the the refactorization pam_unix_ref branch into the trunk. Added support for sha256 and sha512 password hashes to pam_unix when the libcrypt supports them.
* Relevant BUGIDs:Tomas Mraz2007-12-051-1/+0
| | | | | | | | | | | | | | | | | | | | | | Purpose of commit: cleanup Commit summary: --------------- 2007-12-05 Tomas Mraz <t8m@centrum.cz> * modules/pam_unix/Makefile.am: Add passverify.h and passverify.c as first part of pam_unix refactorization. * modules/pam_unix/pam_unix/pam_unix_acct.c: Include passverify.h. * modules/pam_unix/pam_unix_passwd.c: Likewise. * modules/pam_unix/passverify.c: New file with common functions. * modules/pam_unix/passverify.h: Prototypes for the common functions. * modules/pam_unix/support.c: Include passverify.h, move _unix_shadowed() to passverify.c. (_unix_verify_password): Refactor out verify_pwd_hash() function. * modules/pam_unix/support.h: Move _unix_shadowed() prototype to passverify.h * modules/pam_unix/unix_chkpwd.c: Use _unix_shadowed() and verify_pwd_hash() from passverify.c.
* Relevant BUGIDs:Tomas Mraz2005-09-261-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Purpose of commit: cleanup Commit summary: --------------- 2005-09-26 Tomas Mraz <t8m@centrum.cz> * modules/pam_unix/pam_unix_acct.c (_unix_run_verify_binary): _log_err() -> pam_syslog() (pam_sm_acct_mgmt): _log_err() -> pam_syslog(), fix warning. * modules/pam_unix/pam_unix_auth.c (pam_sm_authenticate): _log_err() -> pam_syslog() * modules/pam_unix/pam_unix_passwd.c: removed obsolete ifdef (getNISserver, _unix_run_shadow_binary, _update_passwd, _update_shadow, _do_setpass, _pam_unix_approve_pass, pam_sm_chauthtok): _log_err() -> pam_syslog() * modules/pam_unix/pam_unix_sess.c: removed obsolete ifdef (pam_sm_open_session, pam_sm_close_session): _log_err() -> pam_syslog() * modules/pam_unix/support.c (_log_err, converse): removed (_make_remark): use pam_prompt() instead of converse() (_set_ctrl, _cleanup_failures, _unix_run_helper_binary, _unix_verify_password, _unix_read_password): _log_err() -> pam_syslog() _cleanup(), _unix_cleanup(): Silence unused param warnings. (_cleanup_failures, _unix_verify_password, _unix_getpwnam, _unix_run_helper_binary): Silence incorrect type warnings. (_unix_read_password): Use multiple pam_prompt() and pam_info() calls instead of converse(). * modules/pam_unix/support.h (_log_err): removed * modules/pam_unix/unix_chkpwd.c (_log_err): LOG_AUTH -> LOG_AUTHPRIV
* Relevant BUGIDs: noneThorsten Kukuk2005-06-091-1/+1
| | | | | | | | | | Purpose of commit: cleanup Commit summary: --------------- Fix all occurrence of dereferencing type-punned pointer will break strict-aliasing rules warnings
* Relevant BUGIDs: noneThorsten Kukuk2005-05-161-0/+1
| | | | | | | | | Purpose of commit: new feature Commit summary: --------------- Add SELinux support, based on Patch from Red Hat
* Relevant BUGIDs:Tomas Mraz2005-04-121-1/+1
| | | | | | | | Purpose of commit: bugfix Commit summary: --------------- pam_unix: nis option shouldn't clear the shadow option
* Relevant BUGIDs:Thorsten Kukuk2004-10-061-1/+7
| | | | | | | | | Purpose of commit: Commit summary: --------------- bugfix: Last part of fixes from Red Hat
* Relevant BUGIDs:Thorsten Kukuk2004-09-241-1/+2
| | | | | | | | | | Purpose of commit: Commit summary: --------------- bugfix: 440107: Add various patches from Linux Distibutors to make PAM modules reentrant.
* Relevant BUGIDs:Thorsten Kukuk2004-09-241-1/+4
| | | | | | | | | | | Purpose of commit: Commit summary: --------------- bugfix: Fix lot of compiler warnings new feature: add broken_shadow option to pam_unix (patch from Linux distributions)
* Relevant BUGIDs: 667584 664290Andrew G. Morgan2003-01-141-1/+0
| | | | | | | | | Purpose of commit: bugfix Commit summary: --------------- Two bug fixes in one: don't trust getlogin() and sanely lower the time the password databases are locked in pam_unix.
* Relevant BUGIDs: 476963Andrew G. Morgan2002-07-111-1/+3
| | | | | | | | | | | | Purpose of commit: new feature Commit summary: --------------- some applications are not prepared to get a SIGCHLD from a child process they didn't think they launched, so we now suppress this signal for the duration of use of the helper binary. The 'noreap' module argument is provided to override this new default.
* Relevant BUGIDs: 126431, 126423Steve Langasek2000-12-201-2/+3
| | | | | | | | | | | | Purpose of commit: new feature / bugfix Commit summary: --------------- This changes the format of pam_unix log messages, per bug 126423. The change is extensive (every call to _log_err() now has an additional argument) but straightforward. These changes to the logging code incidentally fix the problem reported in bug 126431.
* Relevant BUGIDs: task 15788, bugs 108297, 117476, 117474Andrew G. Morgan2000-11-191-0/+4
| | | | | | | | | | | | | | Purpose of commit: autoconf support for Linux-PAM Commit summary: --------------- This is a merge of the autoconf support that was developed against a 0-72 branch. [Note, because CVS has some issues, this is actually only 95% of the actual commit. The other files were actually committed when the preparation branch Linux-PAM-0-73pre-autoconf was updated. Hopefully, this will complete the merge.]
* Initial revisionAndrew G. Morgan2000-06-201-0/+139
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