Adding Credential management.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/fido/credential.h

@@ -0,0 +1,45 @@
+/*
+ * This file is part of the Pico FIDO distribution (https://github.com/polhenarejos/pico-fido).
+ * Copyright (c) 2022 Pol Henarejos.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _CREDENTIAL_H_
+#define _CREDENTIAL_H_
+
+#include "ctap2_cbor.h"
+
+typedef struct CredOptions {
+    const bool *rk;
+    const bool *up;
+    const bool *uv;
+    bool present;
+} CredOptions;
+
+typedef struct Credential {
+    CborCharString rpId;
+    CborByteString userId;
+    uint64_t creation;
+    const bool *hmac_secret;
+    const bool *use_sign_count;
+    int64_t alg;
+    int64_t curve;
+    bool present;
+} Credential;
+
+extern int credential_verify(CborByteString *cred_id, const uint8_t *rp_id_hash);
+extern int credential_create(CborCharString *rpId, CborByteString *userId, CborCharString *userName, CborCharString *userDisplayName, const bool *hmac_secret, bool use_sign_count, int alg, int curve, uint8_t *cred_id, size_t *cred_id_len);
+extern void credential_free(Credential *cred);
+
+#endif // _CREDENTIAL_H_