Sesame-Device/include/interface/ESP32CryptoSource.h

#pragma once

#include "relay/interface/CryptoSource.h"
#include "ESP32NoiseSource.h"

class ESP32CryptoSource: public CryptoSource {

public:

    ESP32CryptoSource(const char* rngInitTag);

    bool isAvailable() override {
        return true;
    }

    /**
     * @brief Create a new random private key
     * 
     * @param key The output buffer where the key will be stored
     * @return true The key was created
     * @return false The key could not be created
     */
    bool createPrivateKey(PrivateKey* key) override;

    /**
     * @brief Create a the public key corresponding to a private key
     * 
     * @param privateKey The private key to use
     * @param publicKey The output buffer where the public key will be stored
     * @return true The key was created
     * @return false The key could not be created
     */
    bool createPublicKey(const PrivateKey* privateKey, PublicKey* publicKey) override;

    /**
     * @brief Sign a message
     * 
     * @param message The message payload to include in the message
     * @param length The length of the payload
     * @param signature The output buffer where the signature is written
     * @return true The signature was created
     * @return false The signature creation failed
     */
    bool sign(const uint8_t *message, uint16_t length, Signature* signature, const PrivateKey* privateKey, const PublicKey* publicKey) override;

    /**
     * @brief Verify a message
     *
     * @param signature The message signature
     * @param publicKey The public key with which the message was signed
     * @param message The pointer to the message data
     * @param length The length of the message
     * @return true The signature is valid
     * @return false The signature is invalid
     */
    bool
    verify(const Signature* signature, const PublicKey* publicKey, const void *message, uint16_t length) override;

private:

    ESP32NoiseSource noise{};
};