naruyaizumi
Version:
A WebSockets library for interacting with WhatsApp Web
65 lines (64 loc) • 2.41 kB
JavaScript
import { proto } from "../../../WAProto/index.js";
import { CiphertextMessage } from "./ciphertext-message.js";
export class SenderKeyDistributionMessage extends CiphertextMessage {
constructor(id, iteration, chainKey, signatureKey, serialized) {
super();
if (serialized) {
try {
const message = serialized.slice(1);
const distributionMessage =
proto.SenderKeyDistributionMessage.decode(message).toJSON();
this.serialized = serialized;
this.id = distributionMessage.id;
this.iteration = distributionMessage.iteration;
this.chainKey =
typeof distributionMessage.chainKey === "string"
? Buffer.from(distributionMessage.chainKey, "base64")
: distributionMessage.chainKey;
this.signatureKey =
typeof distributionMessage.signingKey === "string"
? Buffer.from(distributionMessage.signingKey, "base64")
: distributionMessage.signingKey;
} catch (e) {
throw new Error(String(e));
}
} else {
const version = this.intsToByteHighAndLow(this.CURRENT_VERSION, this.CURRENT_VERSION);
this.id = id;
this.iteration = iteration;
this.chainKey = chainKey;
this.signatureKey = signatureKey;
const message = proto.SenderKeyDistributionMessage.encode(
proto.SenderKeyDistributionMessage.create({
id,
iteration,
chainKey,
signingKey: this.signatureKey,
})
).finish();
this.serialized = Buffer.concat([Buffer.from([version]), message]);
}
}
intsToByteHighAndLow(highValue, lowValue) {
return (((highValue << 4) | lowValue) & 0xff) % 256;
}
serialize() {
return this.serialized;
}
getType() {
return this.SENDERKEY_DISTRIBUTION_TYPE;
}
getIteration() {
return this.iteration;
}
getChainKey() {
return this.chainKey;
}
getSignatureKey() {
return this.signatureKey;
}
getId() {
return this.id;
}
}
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