RFID: add support for Kantech IOProx cards (#1261)

applications/lfrfid/helpers/protocols/protocol_ioprox.h

@@ -0,0 +1,26 @@
+#pragma once
+#include "protocol_generic.h"
+
+class ProtocolIoProx : public ProtocolGeneric {
+public:
+    uint8_t get_encoded_data_size() final;
+    uint8_t get_decoded_data_size() final;
+
+    void encode(
+        const uint8_t* decoded_data,
+        const uint8_t decoded_data_size,
+        uint8_t* encoded_data,
+        const uint8_t encoded_data_size) final;
+
+    void decode(
+        const uint8_t* encoded_data,
+        const uint8_t encoded_data_size,
+        uint8_t* decoded_data,
+        const uint8_t decoded_data_size) final;
+
+    bool can_be_decoded(const uint8_t* encoded_data, const uint8_t encoded_data_size) final;
+
+private:
+    /**  Computes the IoProx checksum of the provided (decoded) data. */
+    uint8_t compute_checksum(const uint8_t* data, const uint8_t data_size);
+};