user-record: add fields for FIDO2 HMAC authentication options

src/shared/user-record.h

@@ -189,6 +189,23 @@ typedef struct Pkcs11EncryptedKey {
         char *hashed_password;
 } Pkcs11EncryptedKey;
 
+typedef struct Fido2HmacCredential {
+        void *id;
+        size_t size;
+} Fido2HmacCredential;
+
+typedef struct Fido2HmacSalt {
+        /* The FIDO2 Cridential ID to use */
+        Fido2HmacCredential credential;
+
+        /* The FIDO2 salt value */
+        void *salt;
+        size_t salt_size;
+
+        /* What to test the hashed salt value against, usualy UNIX password hash here. */
+        char *hashed_password;
+} Fido2HmacSalt;
+
 typedef struct UserRecord {
         /* The following three fields are not part of the JSON record */
         unsigned n_ref;
@@ -309,6 +326,11 @@ typedef struct UserRecord {
         size_t n_pkcs11_encrypted_key;
         int pkcs11_protected_authentication_path_permitted;
 
+        Fido2HmacCredential *fido2_hmac_credential;
+        size_t n_fido2_hmac_credential;
+        Fido2HmacSalt *fido2_hmac_salt;
+        size_t n_fido2_hmac_salt;
+
         JsonVariant *json;
 } UserRecord;