fluencelabs/js-libp2p-noise
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Add encryption methods

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This commit is contained in:
morrigan
2019-11-01 11:30:28 +01:00
parent e55fa206fd
commit 175d8940be
3 changed files with 45 additions and 2 deletions
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28
src/xx.ts
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@ -1,6 +1,7 @@
import {bytes32, bytes16, uint32, uint64, bytes} from './types/basic'
import { Buffer } from 'buffer';
import * as crypto from 'libp2p-crypto';
import * as sodium from 'sodium-native';
type KeyPair = {
publicKey: bytes32,
@ -60,11 +61,38 @@ class XXHandshake {
return {ss, s, e, rs, re, psk};
}
incrementNonce(n: uint32) : uint32 {
return n + 1;
}
encrypt(k: bytes32, n: uint32, ad: bytes, plaintext: bytes) : bytes {
const ElongatedNonce = sodium.sodium_malloc(sodium.crypto_aead_xchacha20poly1305_ietf_NPUBBYTES); // 12U ?
sodium.sodium_memzero(ElongatedNonce);
ElongatedNonce.set(n, 16);
const clen = plaintext.length + sodium.crypto_aead_xchacha20poly1305_ietf_ABYTES;
const c = sodium.sodium_malloc(clen);
sodium.crypto_aead_xchacha20poly1305_ietf_encrypt(c, plaintext, ad, null, ElongatedNonce, k);
}
// Cipher state related
initializeKey(k: bytes32) : CipherState {
const n = minNonce;
return { k, n };
}
setNonce(cs: CipherState, nonce: uint32) {
cs.n = nonce;
}
encryptWithAd(cs: CipherState, ad: bytes, plaintext: bytes) : bytes {
const e = this.encrypt(cs.k, cs.n, ad, plaintext);
this.setNonce(cs, this.incrementNonce(cs.n));
return e;
}
// Symmetric state related
async initializeSymmetric(protocolName: string) : Promise<SymmetricState> {
const h = await this.hashProtocolName(protocolName);
const ck = h;