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handshake.js
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handshake.js
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var Buffer = require('buffer/').Buffer;
var forge = require("./forgewrap");
/**
* An astrxdBox Protocol HandshakePack.
* @class
* @property {Number} version - The version of the pack.
* @property {Buffer} data - The data contained in a pack.
*/
class aBPHPack {
/**
* Creates an aBPHPack
* @param {Buffer} data Data
* @param {number} [version=0] Pack version
*/
constructor(data, version = 0) {
this.version = version;
this.data = data;
}
/**
* Unpacks an aBPHPack from bytes.
* @param {Buffer} x Input bytes
* @param {rsa.PrivateKey} k Private key
* @returns {aBPHPack} Output object
*/
static unpack(x, k) {
// Decrypt data with key
var dx = forge.rsa.decrypt(k, x.slice(1));
return new aBPHPack(dx, x.readUInt8(0));
}
/**
* Packs an aBPHPack into bytes.
* @param {rsa.PublicKey} k Public key
* @returns {Buffer} Output bytes
*/
pack(k) {
var ex = forge.rsa.encrypt(k, this.data);
var buf = Buffer.alloc(1 + ex.length);
buf.writeUInt8(this.version, 0);
ex.copy(buf, 1, 0, ex.length);
return buf;
}
}
module.exports = aBPHPack;