Smart Contract-Based Cross-Domain Authentication and Key Agreement System for Heterogeneous Wireless Networks

Table 3

Constructor of the smart contract.

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Algorithm 1 constructor of smart contract

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Structure AP_PK

% define the structure of information of AP’s public key.

 ID; % ID of an AP.

 PK; % the public key of the AP.

 T_begin; % the public key effective start time.

 T_end; % the public key expiration time.

 sig; % CA’s signature of ID, PK, T_begin, and T_end.

Structure CA_Info CA

% define the structure of information of CA. And CA, an CA_Info structure variable is public to all node

 ID_domain; % domain ID

 Basicpare; % the basic public parameter of the domain.

 PK; % the public key of CA.

 sig; % CA’s signature of ID_domain and PK.

Map(hash- > bool) user % A map denote if user is registered it returns true.

Map(ID- > AP_PK) ap % A map denote if ID is registered it returns the public key information of the node corresponding to ID.

Uint len; % the number of nodes.

function PK_domain (id, pare, pk, sig)

% constructor, it is automatically invoked when this smart contract is deployed; initialize CA and only this function can modify variable CA.

 owner = sender.addr; % Define CA is the owner of the contract.

 CA = {id, pare, pk, sig};

 len = 0;

function get_CA(·)

% Invoked to obtain the information of the domain.

 return CA;

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