add encrypting for save files

add libhydrogen for encrypting and decrypting #9
2026-04-03 14:59:37 +02:00
parent abb6556fd4
commit c277ab10d9
68 changed files with 5737 additions and 74 deletions
@@ -0,0 +1,23 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/* Declarations from ChibiOS HAL TRNG module */
+
+extern struct hal_trng_driver TRNGD1;
+
+void trngStart(struct hal_trng_driver *, const void *);
+bool trngGenerate(struct hal_trng_driver *, size_t size, uint8_t *);
+
+static int
+hydro_random_init(void)
+{
+    trngStart(&TRNGD1, NULL);
+
+    if (trngGenerate(&TRNGD1, sizeof hydro_random_context.state, hydro_random_context.state)) {
+        return -1;
+    }
+    hydro_random_context.counter = ~LOAD64_LE(hydro_random_context.state);
+
+    return 0;
+}