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Fix todos and finish stage 1

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This commit is contained in:
morrigan
2019-11-06 15:45:28 +01:00
parent 1666769690
commit 87d7ed9c41
2 changed files with 18 additions and 8 deletions
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21
src/xx.ts
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@ -74,7 +74,7 @@ export class XXHandshake {
}
private dh(privateKey: bytes32, publicKey: bytes32) : bytes32 {
const derived = x25519.derive(privateKey, publicKey);
const derived = x25519.derive(publicKey, privateKey);
const result = Buffer.alloc(32);
derived.copy(result);
return result;
@ -268,14 +268,18 @@ export class XXHandshake {
}
private async readMessageA(hs: HandshakeState, message: MessageBuffer) : Promise<bytes> {
// TODO: validate public key here
if (x25519.publicKeyVerify(message.ne)) {
hs.re = message.ne;
}
this.mixHash(hs.ss, hs.re);
return await this.decryptAndHash(hs.ss, message.ciphertext);
}
private async readMessageB(hs: HandshakeState, message: MessageBuffer) : Promise<bytes> {
// TODO: validate public key here
if (x25519.publicKeyVerify(message.ne)) {
hs.re = message.ne;
}
this.mixHash(hs.ss, hs.re);
if (!hs.e) {
@ -283,16 +287,19 @@ export class XXHandshake {
}
this.mixKey(hs.ss, this.dh(hs.e.privateKey, hs.re));
const ns = await this.decryptAndHash(hs.ss, message.ns);
// TODO: validate ns here as public key
hs.rs = ns;
if (ns.length === 32 && x25519.publicKeyVerify(message.ns)) {
hs.rs = ns;
}
this.mixKey(hs.ss, this.dh(hs.e.privateKey, hs.rs));
return await this.decryptAndHash(hs.ss, message.ciphertext);
}
private async readMessageC(hs: HandshakeState, message: MessageBuffer) {
const ns = await this.decryptAndHash(hs.ss, message.ns);
// TODO: validate ns here as public key
hs.rs = ns;
if (ns.length === 32 && x25519.publicKeyVerify(message.ns)) {
hs.rs = ns;
}
if (!hs.e) {
throw new Error("Handshake state `e` param is missing.");
}