fix: reuse output when decrypting using noble/ciphers (#345)

* reuse output when decrypting using noble/ciphers

Signed-off-by: Marin Petrunic <marin.petrunic@gmail.com>

* bump @noble dep

Signed-off-by: Marin Petrunic <marin.petrunic@gmail.com>

* update readme

Signed-off-by: Marin Petrunic <marin.petrunic@gmail.com>

---------

Signed-off-by: Marin Petrunic <marin.petrunic@gmail.com>

Author: mpetrunic

.nvmrc

@@ -1 +1 @@
-16
+18

README.md

@@ -47,7 +47,7 @@ This module exposes an implementation of the [ConnectionEncrypter](https://libp2
 
 ## Bring your own crypto
 
-You can provide a custom crypto implementation (instead of the default, based on [stablelib](https://www.stablelib.com/)) by adding a `crypto` field to the init argument passed to the `Noise` factory.
+You can provide a custom crypto implementation (instead of the default, based on [@noble](https://paulmillr.com/noble/)) by adding a `crypto` field to the init argument passed to the `Noise` factory.
 
 The implementation must conform to the `ICryptoInterface`, defined in https://github.com/ChainSafe/js-libp2p-noise/blob/master/src/crypto.ts
 

package.json

@@ -72,9 +72,9 @@
     "@libp2p/interface": "^0.1.0",
     "@libp2p/logger": "^3.0.0",
     "@libp2p/peer-id": "^3.0.0",
-    "@noble/ciphers": "^0.1.4",
     "@noble/curves": "^1.1.0",
     "@noble/hashes": "^1.3.1",
+    "@noble/ciphers": "^0.3.0",
     "it-byte-stream": "^1.0.0",
     "it-length-prefixed": "^9.0.1",
     "it-length-prefixed-stream": "^1.0.0",

src/crypto/js.ts

@@ -1,4 +1,4 @@
-import { chacha20_poly1305 } from '@noble/ciphers/chacha'
+import { chacha20poly1305 } from '@noble/ciphers/chacha'
 import { x25519 } from '@noble/curves/ed25519'
 import { extract, expand } from '@noble/hashes/hkdf'
 import { sha256 } from '@noble/hashes/sha256'
@@ -48,15 +48,10 @@ export const pureJsCrypto: ICryptoInterface = {
   },
 
   chaCha20Poly1305Encrypt (plaintext: Uint8Array, nonce: Uint8Array, ad: Uint8Array, k: bytes32): bytes {
-    return chacha20_poly1305(k, nonce, ad).encrypt(plaintext)
+    return chacha20poly1305(k, nonce, ad).encrypt(plaintext)
   },
 
   chaCha20Poly1305Decrypt (ciphertext: Uint8Array, nonce: Uint8Array, ad: Uint8Array, k: bytes32, dst?: Uint8Array): bytes | null {
-    const result = chacha20_poly1305(k, nonce, ad).decrypt(ciphertext)
-    if (dst) {
-      dst.set(result)
-      return result
-    }
-    return result
+    return chacha20poly1305(k, nonce, ad).decrypt(ciphertext, dst)
   }
 }