bool passdb_cache_lookup_credentials(struct auth_request *request,
const char *key, const char **password_r,
const char **scheme_r,
enum passdb_result *result_r,
bool use_expired)
{
const char *value, *const *list;
struct auth_cache_node *node;
bool expired, neg_expired;
if (passdb_cache == NULL)
return FALSE;
value = auth_cache_lookup(passdb_cache, request, key, &node,
&expired, &neg_expired);
if (value == NULL || (expired && !use_expired)) {
auth_request_log_debug(request, AUTH_SUBSYS_DB,
value == NULL ? "cache miss" :
"cache expired");
return FALSE;
}
passdb_cache_log_hit(request, value);
if (*value == '\0') {
/* negative cache entry */
*result_r = PASSDB_RESULT_USER_UNKNOWN;
*password_r = NULL;
*scheme_r = NULL;
return TRUE;
}
list = t_strsplit_tab(value);
auth_request_set_fields(request, list + 1, NULL);
*result_r = PASSDB_RESULT_OK;
*password_r = *list[0] == '\0' ? NULL : list[0];
*scheme_r = password_get_scheme(password_r);
i_assert(*scheme_r != NULL || *password_r == NULL);
return TRUE;
}
static bool
passdb_cache_lookup(struct auth_request *request, const char *key,
bool use_expired, struct auth_cache_node **node_r,
const char **value_r, bool *neg_expired_r)
{
const char *value;
bool expired;
/* value = password \t ... */
value = auth_cache_lookup(passdb_cache, request, key, node_r,
&expired, neg_expired_r);
if (value == NULL || (expired && !use_expired)) {
auth_request_log_debug(request, AUTH_SUBSYS_DB,
value == NULL ? "cache miss" :
"cache expired");
return FALSE;
}
passdb_cache_log_hit(request, value);
*value_r = value;
return TRUE;
}
bool passdb_cache_verify_plain(struct auth_request *request, const char *key,
const char *password,
enum passdb_result *result_r, int use_expired)
{
const char *value, *cached_pw, *scheme, *const *list;
struct auth_cache_node *node;
int ret;
bool expired, neg_expired;
if (passdb_cache == NULL || key == NULL)
return FALSE;
/* value = password \t ... */
value = auth_cache_lookup(passdb_cache, request, key, &node,
&expired, &neg_expired);
if (value == NULL || (expired && !use_expired)) {
auth_request_log_debug(request, AUTH_SUBSYS_DB,
value == NULL ? "cache miss" :
"cache expired");
return FALSE;
}
passdb_cache_log_hit(request, value);
if (*value == '\0') {
/* negative cache entry */
auth_request_log_unknown_user(request, AUTH_SUBSYS_DB);
*result_r = PASSDB_RESULT_USER_UNKNOWN;
return TRUE;
}
list = t_strsplit_tab(value);
cached_pw = list[0];
if (*cached_pw == '\0') {
/* NULL password */
auth_request_log_info(request, AUTH_SUBSYS_DB,
"Cached NULL password access");
ret = 1;
} else {
scheme = password_get_scheme(&cached_pw);
i_assert(scheme != NULL);
ret = auth_request_password_verify(request, password, cached_pw,
scheme, AUTH_SUBSYS_DB);
if (ret == 0 && (node->last_success || neg_expired)) {
/* a) the last authentication was successful. assume
that the password was changed and cache is expired.
b) negative TTL reached, use it for password
mismatches too. */
node->last_success = FALSE;
return FALSE;
}
}
node->last_success = ret > 0;
/* save the extra_fields only after we know we're using the
cached data */
auth_request_set_fields(request, list + 1, NULL);
*result_r = ret > 0 ? PASSDB_RESULT_OK :
PASSDB_RESULT_PASSWORD_MISMATCH;
return TRUE;
}