pac responder: use only lower case user name

Since winbind can only return lower-cased user name the pac responder
must do the same to avoid inconsistent behaviour.

2 files changed, 15 insertions, 5 deletions

diff --git a/src/responder/pac/pacsrv_cmd.c b/src/responder/pac/pacsrv_cmd.c
index b7edf81d..4cbf14b5 100644
--- a/src/responder/pac/pacsrv_cmd.c
+++ b/src/responder/pac/pacsrv_cmd.c
@@ -113,13 +113,21 @@ static errno_t pac_add_pac_user(struct cli_ctx *cctx)
         goto done;
     }
 
-    pr_ctx->user_name = pr_ctx->logon_info->info3.base.account_name.string;
-    if (pr_ctx->user_name == NULL) {
+    if (pr_ctx->logon_info->info3.base.account_name.string == NULL) {
         ret = EINVAL;
         DEBUG(SSSDBG_FATAL_FAILURE, ("Missing account name in PAC.\n"));
         goto done;
     }
 
+    /* To be compatible with winbind based lookups we have to use lower case
+     * names only, effectively making the domain case-insenvitive. */
+    pr_ctx->user_name = sss_tc_utf8_str_tolower(pr_ctx,
+                            pr_ctx->logon_info->info3.base.account_name.string);
+    if (pr_ctx->user_name == NULL) {
+        ret = ENOMEM;
+        DEBUG(SSSDBG_FATAL_FAILURE, ("sss_tc_utf8_str_tolower failed.\n"));
+        goto done;
+    }
 
     pr_ctx->dom = responder_get_domain(pr_ctx, cctx->rctx, pr_ctx->domain_name);
     if (pr_ctx->dom == NULL) {
diff --git a/src/responder/pac/pacsrv_utils.c b/src/responder/pac/pacsrv_utils.c
index 48caae64..4b55ef3e 100644
--- a/src/responder/pac/pacsrv_utils.c
+++ b/src/responder/pac/pacsrv_utils.c
@@ -510,10 +510,12 @@ errno_t get_pwd_from_pac(TALLOC_CTX *mem_ctx,
     base_info = &logon_info->info3.base;
 
     if (base_info->account_name.size != 0) {
-        pwd->pw_name = talloc_strdup(pwd,
-                                     base_info->account_name.string);
+        /* To be compatible with winbind based lookups we have to use lower
+         * case names only, effectively making the domain case-insenvitive. */
+        pwd->pw_name = sss_tc_utf8_str_tolower(pwd,
+                                               base_info->account_name.string);
         if (pwd->pw_name == NULL) {
-            DEBUG(SSSDBG_OP_FAILURE, ("talloc_strdup failed.\n"));
+            DEBUG(SSSDBG_OP_FAILURE, ("sss_tc_utf8_str_tolower failed.\n"));
             ret = ENOMEM;
             goto done;
         }