Credentials

The Credentials module is responsible for managing and securing device credentials. Leveraging cryptographic standards and persistent storage mechanisms, the Credentials class ensures that device identities and keys are generated, stored, and utilized securely.

Template Parameters:

• T_topic The type representing the event topic identifier.

• T_msg The type representing the event message.

• T_data The type representing the data associated with the event.

Methods:

• Credentials() Constructs a Credentials instance, initializing credential data by restoring stored credentials or generating new ones if none exist.

• virtual bool store() override Stores the current credentials into persistent CBOR storage.

• virtual bool restore() override Restores credentials from persistent CBOR storage.

• void setOwnerId(const String &id) Sets the owner identifier for the credentials.

• const String &getOwnerId() const Retrieves the owner identifier.

• const String &getCreatorId() const Retrieves the creator identifier.

• const String &getDeviceId() const Retrieves the device identifier.

• const String &getPublicKey() const Retrieves the public key in hexadecimal string format.

• uint32_t getShortDeviceId() const Retrieves a shortened device ID derived from the higher 32 bits of the MAC address for ESP32 or the chip ID for ESP8266.

• virtual Bytes keyId() const override Retrieves the public key used as the key identifier.

• virtual Bytes sign(const Bytes &data) const override Signs the provided data using the device's private key.

• virtual COSEAlgorithm signerAlgorithm() const override Retrieves the cryptographic algorithm used for signing.

Private Members:

• String mOwnerId Stores the owner identifier.

• String mCreatorId Stores the creator identifier.

• String mDeviceId Stores the device identifier derived from the MAC address.

• Bytes mPrivateKey Stores the device's private key.

• Bytes mPublicKeyRaw Stores the raw public key bytes.

• String mPublicKey Stores the public key in hexadecimal string format.