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From 7bad6a24160e34bce8f10e73dbbf9e5fbbcd1904 Mon Sep 17 00:00:00 2001
From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Mon, 9 May 2022 15:23:33 +0300
Subject: [PATCH 1/2] auth: Fix handling passdbs with identical driver/args but
different mechanisms/username_filter
The passdb was wrongly deduplicated in this situation, causing wrong
mechanisms or username_filter setting to be used. This would be a rather
unlikely configuration though.
Fixed by moving mechanisms and username_filter from struct passdb_module
to struct auth_passdb, which is where they should have been in the first
place.
---
src/auth/auth-request.c | 6 +++---
src/auth/auth.c | 18 ++++++++++++++++++
src/auth/auth.h | 5 +++++
src/auth/passdb.c | 15 ++-------------
src/auth/passdb.h | 4 ----
5 files changed, 28 insertions(+), 20 deletions(-)
diff --git a/src/auth/auth-request.c b/src/auth/auth-request.c
index cd08b1fa02..0ca29f3674 100644
--- a/src/auth/auth-request.c
+++ b/src/auth/auth-request.c
@@ -534,8 +534,8 @@ auth_request_want_skip_passdb(struct auth_request *request,
struct auth_passdb *passdb)
{
/* if mechanism is not supported, skip */
- const char *const *mechs = passdb->passdb->mechanisms;
- const char *const *username_filter = passdb->passdb->username_filter;
+ const char *const *mechs = passdb->mechanisms;
+ const char *const *username_filter = passdb->username_filter;
const char *username;
username = request->fields.user;
@@ -548,7 +548,7 @@ auth_request_want_skip_passdb(struct auth_request *request,
return TRUE;
}
- if (passdb->passdb->username_filter != NULL &&
+ if (passdb->username_filter != NULL &&
!auth_request_username_accepted(username_filter, username)) {
auth_request_log_debug(request,
request->mech != NULL ? AUTH_SUBSYS_MECH
diff --git a/src/auth/auth.c b/src/auth/auth.c
index f2f3fda20c..9f6c4ba60c 100644
--- a/src/auth/auth.c
+++ b/src/auth/auth.c
@@ -99,6 +99,24 @@ auth_passdb_preinit(struct auth *auth, const struct auth_passdb_settings *set,
auth_passdb->override_fields_tmpl =
passdb_template_build(auth->pool, set->override_fields);
+ if (*set->mechanisms == '\0') {
+ auth_passdb->mechanisms = NULL;
+ } else if (strcasecmp(set->mechanisms, "none") == 0) {
+ auth_passdb->mechanisms = (const char *const[]){ NULL };
+ } else {
+ auth_passdb->mechanisms =
+ (const char *const *)p_strsplit_spaces(auth->pool,
+ set->mechanisms, " ,");
+ }
+
+ if (*set->username_filter == '\0') {
+ auth_passdb->username_filter = NULL;
+ } else {
+ auth_passdb->username_filter =
+ (const char *const *)p_strsplit_spaces(auth->pool,
+ set->username_filter, " ,");
+ }
+
/* for backwards compatibility: */
if (set->pass)
auth_passdb->result_success = AUTH_DB_RULE_CONTINUE;
diff --git a/src/auth/auth.h b/src/auth/auth.h
index f700e29d5c..460a179765 100644
--- a/src/auth/auth.h
+++ b/src/auth/auth.h
@@ -41,6 +41,11 @@ struct auth_passdb {
struct passdb_template *default_fields_tmpl;
struct passdb_template *override_fields_tmpl;
+ /* Supported authentication mechanisms, NULL is all, {NULL} is none */
+ const char *const *mechanisms;
+ /* Username filter, NULL is no filter */
+ const char *const *username_filter;
+
enum auth_passdb_skip skip;
enum auth_db_rule result_success;
enum auth_db_rule result_failure;
diff --git a/src/auth/passdb.c b/src/auth/passdb.c
index eb4ac8ae82..f5eed1af4f 100644
--- a/src/auth/passdb.c
+++ b/src/auth/passdb.c
@@ -224,19 +224,8 @@ passdb_preinit(pool_t pool, const struct auth_passdb_settings *set)
passdb->id = ++auth_passdb_id;
passdb->iface = *iface;
passdb->args = p_strdup(pool, set->args);
- if (*set->mechanisms == '\0') {
- passdb->mechanisms = NULL;
- } else if (strcasecmp(set->mechanisms, "none") == 0) {
- passdb->mechanisms = (const char *const[]){NULL};
- } else {
- passdb->mechanisms = (const char* const*)p_strsplit_spaces(pool, set->mechanisms, " ,");
- }
-
- if (*set->username_filter == '\0') {
- passdb->username_filter = NULL;
- } else {
- passdb->username_filter = (const char* const*)p_strsplit_spaces(pool, set->username_filter, " ,");
- }
+ /* NOTE: if anything else than driver & args are added here,
+ passdb_find() also needs to be updated. */
array_push_back(&passdb_modules, &passdb);
return passdb;
}
diff --git a/src/auth/passdb.h b/src/auth/passdb.h
index 2e95328e5c..e466a9fdb6 100644
--- a/src/auth/passdb.h
+++ b/src/auth/passdb.h
@@ -63,10 +63,6 @@ struct passdb_module {
/* Default password scheme for this module.
If default_cache_key is set, must not be NULL. */
const char *default_pass_scheme;
- /* Supported authentication mechanisms, NULL is all, [NULL] is none*/
- const char *const *mechanisms;
- /* Username filter, NULL is no filter */
- const char *const *username_filter;
/* If blocking is set to TRUE, use child processes to access
this passdb. */
From a1022072e2ce36f853873d910287f466165b184b Mon Sep 17 00:00:00 2001
From: Timo Sirainen <timo.sirainen@open-xchange.com>
Date: Mon, 16 May 2022 14:58:45 +0200
Subject: [PATCH 2/2] auth: Add a comment about updating userdb_find()
---
src/auth/userdb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/auth/userdb.c b/src/auth/userdb.c
index 0849659102..830bc2dd64 100644
--- a/src/auth/userdb.c
+++ b/src/auth/userdb.c
@@ -158,7 +158,8 @@ userdb_preinit(pool_t pool, const struct auth_userdb_settings *set)
userdb->id = ++auth_userdb_id;
userdb->iface = iface;
userdb->args = p_strdup(pool, set->args);
-
+ /* NOTE: if anything else than driver & args are added here,
+ userdb_find() also needs to be updated. */
array_push_back(&userdb_modules, &userdb);
return userdb;
}
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