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sssd/SOURCES/0013-ldap-add-exop_force-value-for-ldap_pwmodify_mode.patch

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Import from CS git
2024-12-17 08:49:08 +00:00
From acd5da528789734411b12fa8b19007b00eea9f2c Mon Sep 17 00:00:00 2001
From: Sumit Bose <sbose@redhat.com>
Date: Fri, 13 Sep 2024 15:45:59 +0200
Subject: [PATCH 13/15] ldap: add 'exop_force' value for ldap_pwmodify_mode
In case the LDAP server allows to run the extended operation to change a
password even if an authenticated bind fails due to missing grace logins
the new option 'exop_force' can be used to run the extended operation to
change the password anyways.
:config: Added `exop_force` value for configuration option
`ldap_pwmodify_mode`. This can be used to force a password change even
if no grace logins are left. Depending on the configuration of the
LDAP server it might be expected that the password change will fail.
(cherry picked from commit 72a7fd0ded236a16b00bb4e26221f7e23b702a53)
Reviewed-by: Justin Stephenson <jstephen@redhat.com>
(cherry picked from commit e3a3f44c4cdcb936b59941636ff576de613366d1)
Reviewed-by: Justin Stephenson <jstephen@redhat.com>
---
src/man/sssd-ldap.5.xml | 11 +++++++++
src/providers/ipa/ipa_auth.c | 3 ++-
src/providers/ldap/ldap_auth.c | 5 +++-
src/providers/ldap/ldap_options.c | 2 ++
src/providers/ldap/sdap.h | 5 ++--
src/providers/ldap/sdap_async.h | 3 ++-
src/providers/ldap/sdap_async_connection.c | 27 +++++++++++++++++-----
7 files changed, 45 insertions(+), 11 deletions(-)
diff --git a/src/man/sssd-ldap.5.xml b/src/man/sssd-ldap.5.xml
index 0a814ec35..a9994aade 100644
--- a/src/man/sssd-ldap.5.xml
+++ b/src/man/sssd-ldap.5.xml
@@ -234,6 +234,17 @@
userPassword (not recommended).
</para>
</listitem>
+ <listitem>
+ <para>
+ exop_force - Try Password Modify
+ Extended Operation (RFC 3062) even if
+ there are no grace logins left.
+ Depending on the type and configuration
+ of the LDAP server the password change
+ might fail because an authenticated bind
+ is not possible.
+ </para>
+ </listitem>
</itemizedlist>
</para>
<para>
diff --git a/src/providers/ipa/ipa_auth.c b/src/providers/ipa/ipa_auth.c
index 1d61a1052..b2e5b6f35 100644
--- a/src/providers/ipa/ipa_auth.c
+++ b/src/providers/ipa/ipa_auth.c
@@ -381,7 +381,8 @@ static void ipa_pam_auth_handler_connect_done(struct tevent_req *subreq)
SDAP_OPT_TIMEOUT);
subreq = sdap_auth_send(state, state->ev, sh, NULL, NULL, dn,
- state->pd->authtok, timeout);
+ state->pd->authtok, timeout,
+ state->auth_ctx->sdap_auth_ctx->opts->pwmodify_mode);
if (subreq == NULL) {
goto done;
}
diff --git a/src/providers/ldap/ldap_auth.c b/src/providers/ldap/ldap_auth.c
index 8ec4d3af5..023ed2277 100644
--- a/src/providers/ldap/ldap_auth.c
+++ b/src/providers/ldap/ldap_auth.c
@@ -896,7 +896,8 @@ static void auth_do_bind(struct tevent_req *req)
NULL, NULL, state->dn,
state->authtok,
dp_opt_get_int(state->ctx->opts->basic,
- SDAP_OPT_TIMEOUT));
+ SDAP_OPT_TIMEOUT),
+ state->ctx->opts->pwmodify_mode);
if (!subreq) {
tevent_req_error(req, ENOMEM);
return;
@@ -1186,6 +1187,7 @@ sdap_pam_change_password_send(TALLOC_CTX *mem_ctx,
switch (opts->pwmodify_mode) {
case SDAP_PWMODIFY_EXOP:
+ case SDAP_PWMODIFY_EXOP_FORCE:
subreq = sdap_exop_modify_passwd_send(state, ev, sh, user_dn,
password, new_password,
timeout);
@@ -1229,6 +1231,7 @@ static void sdap_pam_change_password_done(struct tevent_req *subreq)
switch (state->mode) {
case SDAP_PWMODIFY_EXOP:
+ case SDAP_PWMODIFY_EXOP_FORCE:
ret = sdap_exop_modify_passwd_recv(subreq, state,
&state->user_error_message);
break;
diff --git a/src/providers/ldap/ldap_options.c b/src/providers/ldap/ldap_options.c
index 277bcb529..72a95300d 100644
--- a/src/providers/ldap/ldap_options.c
+++ b/src/providers/ldap/ldap_options.c
@@ -294,6 +294,8 @@ int ldap_get_options(TALLOC_CTX *memctx,
opts->pwmodify_mode = SDAP_PWMODIFY_EXOP;
} else if (strcasecmp(pwmodify, "ldap_modify") == 0) {
opts->pwmodify_mode = SDAP_PWMODIFY_LDAP;
+ } else if (strcasecmp(pwmodify, "exop_force") == 0) {
+ opts->pwmodify_mode = SDAP_PWMODIFY_EXOP_FORCE;
} else {
DEBUG(SSSDBG_FATAL_FAILURE, "Unrecognized pwmodify mode: %s\n", pwmodify);
ret = EINVAL;
diff --git a/src/providers/ldap/sdap.h b/src/providers/ldap/sdap.h
index 103d50ed4..cc34c8198 100644
--- a/src/providers/ldap/sdap.h
+++ b/src/providers/ldap/sdap.h
@@ -546,8 +546,9 @@ struct sdap_options {
/* password modify mode */
enum pwmodify_mode {
- SDAP_PWMODIFY_EXOP = 1, /* pwmodify extended operation */
- SDAP_PWMODIFY_LDAP = 2 /* ldap_modify of userPassword */
+ SDAP_PWMODIFY_EXOP = 1, /* pwmodify extended operation */
+ SDAP_PWMODIFY_LDAP = 2, /* ldap_modify of userPassword */
+ SDAP_PWMODIFY_EXOP_FORCE = 3 /* forced pwmodify extended operation */
} pwmodify_mode;
/* The search bases for the domain or its subdomain */
diff --git a/src/providers/ldap/sdap_async.h b/src/providers/ldap/sdap_async.h
index a45e057d0..80b403bc3 100644
--- a/src/providers/ldap/sdap_async.h
+++ b/src/providers/ldap/sdap_async.h
@@ -146,7 +146,8 @@ struct tevent_req *sdap_auth_send(TALLOC_CTX *memctx,
const char *sasl_user,
const char *user_dn,
struct sss_auth_token *authtok,
- int simple_bind_timeout);
+ int simple_bind_timeout,
+ enum pwmodify_mode pwmodify_mode);
errno_t sdap_auth_recv(struct tevent_req *req,
TALLOC_CTX *memctx,
diff --git a/src/providers/ldap/sdap_async_connection.c b/src/providers/ldap/sdap_async_connection.c
index e8638725c..992a5798c 100644
--- a/src/providers/ldap/sdap_async_connection.c
+++ b/src/providers/ldap/sdap_async_connection.c
@@ -643,6 +643,7 @@ struct simple_bind_state {
struct tevent_context *ev;
struct sdap_handle *sh;
const char *user_dn;
+ enum pwmodify_mode pwmodify_mode;
struct sdap_op *op;
@@ -659,7 +660,8 @@ static struct tevent_req *simple_bind_send(TALLOC_CTX *memctx,
struct sdap_handle *sh,
int timeout,
const char *user_dn,
- struct berval *pw)
+ struct berval *pw,
+ enum pwmodify_mode pwmodify_mode)
{
struct tevent_req *req;
struct simple_bind_state *state;
@@ -682,6 +684,7 @@ static struct tevent_req *simple_bind_send(TALLOC_CTX *memctx,
state->ev = ev;
state->sh = sh;
state->user_dn = user_dn;
+ state->pwmodify_mode = pwmodify_mode;
ret = sss_ldap_control_create(LDAP_CONTROL_PASSWORDPOLICYREQUEST,
0, NULL, 0, &ctrls[0]);
@@ -866,7 +869,12 @@ static void simple_bind_done(struct sdap_op *op,
* Grace Authentications". */
DEBUG(SSSDBG_TRACE_LIBS,
"Password expired, grace logins exhausted.\n");
- ret = ERR_AUTH_FAILED;
+ if (state->pwmodify_mode == SDAP_PWMODIFY_EXOP_FORCE) {
+ DEBUG(SSSDBG_TRACE_LIBS, "Password change forced.\n");
+ ret = ERR_PASSWORD_EXPIRED;
+ } else {
+ ret = ERR_AUTH_FAILED;
+ }
}
} else if (strcmp(response_controls[c]->ldctl_oid,
LDAP_CONTROL_PWEXPIRED) == 0) {
@@ -879,7 +887,12 @@ static void simple_bind_done(struct sdap_op *op,
if (result == LDAP_INVALID_CREDENTIALS) {
DEBUG(SSSDBG_TRACE_LIBS,
"Password expired, grace logins exhausted.\n");
- ret = ERR_AUTH_FAILED;
+ if (state->pwmodify_mode == SDAP_PWMODIFY_EXOP_FORCE) {
+ DEBUG(SSSDBG_TRACE_LIBS, "Password change forced.\n");
+ ret = ERR_PASSWORD_EXPIRED;
+ } else {
+ ret = ERR_AUTH_FAILED;
+ }
} else {
DEBUG(SSSDBG_TRACE_LIBS,
"Password expired, user must set a new password.\n");
@@ -1358,7 +1371,8 @@ struct tevent_req *sdap_auth_send(TALLOC_CTX *memctx,
const char *sasl_user,
const char *user_dn,
struct sss_auth_token *authtok,
- int simple_bind_timeout)
+ int simple_bind_timeout,
+ enum pwmodify_mode pwmodify_mode)
{
struct tevent_req *req, *subreq;
struct sdap_auth_state *state;
@@ -1397,7 +1411,7 @@ struct tevent_req *sdap_auth_send(TALLOC_CTX *memctx,
pw.bv_len = pwlen;
state->is_sasl = false;
- subreq = simple_bind_send(state, ev, sh, simple_bind_timeout, user_dn, &pw);
+ subreq = simple_bind_send(state, ev, sh, simple_bind_timeout, user_dn, &pw, pwmodify_mode);
if (!subreq) {
tevent_req_error(req, ENOMEM);
return tevent_req_post(req, ev);
@@ -1972,7 +1986,8 @@ static void sdap_cli_auth_step(struct tevent_req *req)
SDAP_SASL_AUTHID),
user_dn, authtok,
dp_opt_get_int(state->opts->basic,
- SDAP_OPT_TIMEOUT));
+ SDAP_OPT_TIMEOUT),
+ state->opts->pwmodify_mode);
talloc_free(authtok);
if (!subreq) {
tevent_req_error(req, ENOMEM);
--
2.46.1
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