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From 513946aec6ddf4cb61d5d460e0478fd7ffd7be21 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?G=C3=BCnther=20Deschner?= <gd@samba.org>
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Date: Wed, 17 Nov 2021 09:56:09 +0100
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Subject: [PATCH] pam_winbind: add new pwd_change_prompt option (defaults to
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off).
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This change disables the prompt for the change of an expired password by
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default (using the PAM_RADIO_TYPE mechanism if present).
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=8691
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Guenther
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Signed-off-by: Guenther Deschner <gd@samba.org>
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Reviewed-by: Alexander Bokovoy <ab@samba.org>
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Reviewed-by: Andreas Schneider <asn@samba.org>
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(cherry picked from commit 20c85cc1da8d8c7f1932fbdd92128bb6dafad472)
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---
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docs-xml/manpages/pam_winbind.conf.5.xml | 7 +++++++
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nsswitch/pam_winbind.c | 12 ++++++++++--
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nsswitch/pam_winbind.h | 1 +
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3 files changed, 18 insertions(+), 2 deletions(-)
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diff --git a/docs-xml/manpages/pam_winbind.conf.5.xml b/docs-xml/manpages/pam_winbind.conf.5.xml
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index 0bc288f91a1..bae9298fc32 100644
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--- a/docs-xml/manpages/pam_winbind.conf.5.xml
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+++ b/docs-xml/manpages/pam_winbind.conf.5.xml
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@@ -194,6 +194,13 @@
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</para></listitem>
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</varlistentry>
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+ <varlistentry>
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+ <term>pwd_change_prompt = yes|no</term>
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+ <listitem><para>
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+ Generate prompt for changing an expired password. Defaults to "no".
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+ </para></listitem>
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+ </varlistentry>
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+
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</variablelist>
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</para>
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diff --git a/nsswitch/pam_winbind.c b/nsswitch/pam_winbind.c
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index 720a4b90d85..06098dd07d8 100644
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--- a/nsswitch/pam_winbind.c
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+++ b/nsswitch/pam_winbind.c
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@@ -479,6 +479,10 @@ static int _pam_parse(const pam_handle_t *pamh,
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ctrl |= WINBIND_MKHOMEDIR;
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}
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+ if (tiniparser_getboolean(d, "global:pwd_change_prompt", false)) {
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+ ctrl |= WINBIND_PWD_CHANGE_PROMPT;
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+ }
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+
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config_from_pam:
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/* step through arguments */
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for (i=argc,v=argv; i-- > 0; ++v) {
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@@ -522,6 +526,8 @@ config_from_pam:
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else if (!strncasecmp(*v, "warn_pwd_expire",
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strlen("warn_pwd_expire")))
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ctrl |= WINBIND_WARN_PWD_EXPIRE;
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+ else if (!strcasecmp(*v, "pwd_change_prompt"))
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+ ctrl |= WINBIND_PWD_CHANGE_PROMPT;
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else if (type != PAM_WINBIND_CLEANUP) {
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__pam_log(pamh, ctrl, LOG_ERR,
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"pam_parse: unknown option: %s", *v);
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@@ -976,7 +982,8 @@ static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
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* successfully sent the warning message.
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* Give the user a chance to change pwd.
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*/
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- if (ret == PAM_SUCCESS) {
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+ if (ret == PAM_SUCCESS &&
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+ (ctx->ctrl & WINBIND_PWD_CHANGE_PROMPT)) {
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if (change_pwd) {
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retval = _pam_winbind_change_pwd(ctx);
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if (retval) {
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@@ -1006,7 +1013,8 @@ static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
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* successfully sent the warning message.
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* Give the user a chance to change pwd.
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*/
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- if (ret == PAM_SUCCESS) {
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+ if (ret == PAM_SUCCESS &&
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+ (ctx->ctrl & WINBIND_PWD_CHANGE_PROMPT)) {
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if (change_pwd) {
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retval = _pam_winbind_change_pwd(ctx);
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if (retval) {
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diff --git a/nsswitch/pam_winbind.h b/nsswitch/pam_winbind.h
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index c6786d65a4d..2f4a25729bd 100644
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--- a/nsswitch/pam_winbind.h
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+++ b/nsswitch/pam_winbind.h
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@@ -157,6 +157,7 @@ do { \
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#define WINBIND_WARN_PWD_EXPIRE 0x00002000
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#define WINBIND_MKHOMEDIR 0x00004000
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#define WINBIND_TRY_AUTHTOK_ARG 0x00008000
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+#define WINBIND_PWD_CHANGE_PROMPT 0x00010000
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#if defined(HAVE_GETTEXT) && !defined(__LCLINT__)
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#define _(string) dgettext(MODULE_NAME, string)
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--
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2.35.1
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