@vreden/meta/lib/Signal/Group/sender-message-key.js

Baileys is a lightweight JavaScript library for interacting with the WhatsApp Web API using WebSocket.

"use strict"
Object.defineProperty(exports, "__esModule", { value: true })

const crypto_1 = require("libsignal/src/crypto")

class SenderMessageKey {
    constructor(iteration, seed) {
        const derivative = (0, crypto_1.deriveSecrets)(seed, Buffer.alloc(32), Buffer.from('WhisperGroup'))
        const keys = new Uint8Array(32)
        keys.set(new Uint8Array(derivative[0].slice(16)))
        keys.set(new Uint8Array(derivative[1].slice(0, 16)), 16)
        this.iv = Buffer.from(derivative[0].slice(0, 16))
        this.cipherKey = Buffer.from(keys.buffer)
        this.iteration = iteration
        this.seed = seed
    }
    getIteration() {
        return this.iteration
    }
    getIv() {
        return this.iv
    }
    getCipherKey() {
        return this.cipherKey
    }
    getSeed() {
        return this.seed
    }
}

module.exports = {
  SenderMessageKey
}