ksCertUtils.h

/*
 *  Copyright (c) 2021-2025, Krzysztof Strehlau
 *
 *  This file is a part of the ksIotFramework library.
 *  All licensing information can be found inside LICENSE.md file.
 *
 *  https://github.com/cziter15/ksIotFrameworkLib/blob/master/LICENSE
 */
 
#pragma once
 
#include <string>
#include <stdint.h>
 
#if (defined(ESP32))
    #if (defined(ESP32) && ESP_ARDUINO_VERSION_MAJOR >= 3)
        #define ksCertUtilsNetCLientSecure_t NetworkClientSecure
    #else
        #define ksCertUtilsNetCLientSecure_t WiFiClientSecure
    #endif
    class ksCertUtilsNetCLientSecure_t;
#elif (defined(ESP8266))
    namespace BearSSL{class WiFiClientSecure;}
    #define ksCertUtilsNetCLientSecure_t BearSSL::WiFiClientSecure
#else 
    #error Platform not implemented.
#endif
 
namespace ksf::misc
{
    class ksCertFingerprint
    {
        protected:
            bool fingerprintToBytes(const std::string& fingerprint, uint8_t* bytes, uint8_t bytesLen) const;
 
        public:
            ksCertFingerprint();
 
            virtual ~ksCertFingerprint();
 
            virtual bool setup(ksCertUtilsNetCLientSecure_t* client, const std::string& fingerprint) = 0;
 
            virtual bool verify(ksCertUtilsNetCLientSecure_t* client) const = 0;
    };
 
#ifdef ESP32
    class ksCertFingerprintESP32 : public ksCertFingerprint
    {
        private:
            uint8_t fingerprintBytes[32];   
 
        public:
            bool setup(ksCertUtilsNetCLientSecure_t* client, const std::string& fingerprint) override;
 
            bool verify(ksCertUtilsNetCLientSecure_t* client) const override;
    };
 
    using ksCertFingerprintHolder = ksCertFingerprintESP32;
#endif
 
#ifdef ESP8266
    class ksCertFingerprintESP8266 : public ksCertFingerprint
    {
        public:
            bool setup(ksCertUtilsNetCLientSecure_t* client, const std::string& fingerprint) override;
 
            bool verify(ksCertUtilsNetCLientSecure_t* client) const override;
    };
 
    using ksCertFingerprintHolder = ksCertFingerprintESP8266;
#endif
}