homework: mae sure PasswordCache is really optional

It was supposed to be optional (i.e. there's a reason why we never
assert()ed on it), and in many codepaths it is, let's make sure it is
everywhere.

1 files changed, 10 insertions, 1 deletions

diff --git a/src/home/homework.h b/src/home/homework.h
index 9331452e3e..5fa4b653e2 100644
--- a/src/home/homework.h
+++ b/src/home/homework.h
@@ -7,6 +7,7 @@
 #include "sd-id128.h"
 
 #include "loop-util.h"
+#include "strv.h"
 #include "user-record.h"
 #include "user-record-util.h"
 
@@ -39,13 +40,21 @@ typedef struct HomeSetup {
 } HomeSetup;
 
 typedef struct PasswordCache {
-        /* Decoding passwords from security tokens is expensive and typically requires user interaction, hence cache any we already figured out. */
+        /* Decoding passwords from security tokens is expensive and typically requires user interaction,
+         * hence cache any we already figured out. */
         char **pkcs11_passwords;
         char **fido2_passwords;
 } PasswordCache;
 
 void password_cache_free(PasswordCache *cache);
 
+static inline bool password_cache_contains(const PasswordCache *cache, const char *p) {
+        if (!cache)
+                return false;
+
+        return strv_contains(cache->pkcs11_passwords, p) || strv_contains(cache->fido2_passwords, p);
+}
+
 #define HOME_SETUP_INIT                                 \
         {                                               \
                 .root_fd = -1,                          \