exo2: implement SmcGenerateAesKek, SmcLoadAesKey

libraries/libexosphere/include/exosphere/pkg1/pkg1_key_generation.hpp

@@ -44,4 +44,12 @@ namespace ams::pkg1 {
     constexpr inline const int OldMasterKeyCount       = KeyGeneration_Count - 1;
     constexpr inline const int OldDeviceMasterKeyCount = KeyGeneration_Count - KeyGeneration_4_0_0;
 
+    constexpr bool IsValidDeviceUniqueKeyGeneration(int generation) {
+        return generation == KeyGeneration_1_0_0 || (KeyGeneration_4_0_0 <= generation && generation <= KeyGeneration_Current);
+    }
+
+    constexpr bool IsValidKeyGeneration(int generation) {
+        return KeyGeneration_Min <= generation && generation <= KeyGeneration_Current;
+    }
+
 }

libraries/libexosphere/include/exosphere/pkg1/pkg1_se_key_slots.hpp

@@ -53,4 +53,8 @@ namespace ams::pkg1 {
         RsaKeySlot_PrivateKey = 1,
     };
 
+    constexpr bool IsUserAesKeySlot(int slot) {
+        return AesKeySlot_UserStart <= slot && slot < AesKeySlot_UserEnd;
+    }
+
 }