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En/decrypt all AEAD chunks in parallel when not returning a stream

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This commit is contained in:
Daniel Huigens 2018-07-06 17:41:58 +02:00
parent d844b8b06c
commit 0b0112d1e6
1 changed files with 9 additions and 6 deletions
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15
src/packet/sym_encrypted_aead_protected.js
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@ -91,14 +91,15 @@ SymEncryptedAEADProtected.prototype.write = function () {
* Decrypt the encrypted payload.
* @param {String} sessionKeyAlgorithm The session key's cipher algorithm e.g. 'aes128'
* @param {Uint8Array} key The session key used to encrypt the payload
* @param {Boolean} asStream Whether the top-level function will return a stream
* @returns {Boolean}
* @async
*/
SymEncryptedAEADProtected.prototype.decrypt = async function (sessionKeyAlgorithm, key) {
SymEncryptedAEADProtected.prototype.decrypt = async function (sessionKeyAlgorithm, key, asStream) {
if (config.aead_protect_version !== 4) {
this.cipherAlgo = enums.write(enums.symmetric, sessionKeyAlgorithm);
}
await this.packets.read(await this.crypt('decrypt', key, stream.clone(this.encrypted)));
await this.packets.read(await this.crypt('decrypt', key, stream.clone(this.encrypted), asStream));
return true;
};
@ -106,16 +107,17 @@ SymEncryptedAEADProtected.prototype.decrypt = async function (sessionKeyAlgorith
* Encrypt the packet list payload.
* @param {String} sessionKeyAlgorithm The session key's cipher algorithm e.g. 'aes128'
* @param {Uint8Array} key The session key used to encrypt the payload
* @param {Boolean} asStream Whether the top-level function will return a stream
* @async
*/
SymEncryptedAEADProtected.prototype.encrypt = async function (sessionKeyAlgorithm, key) {
SymEncryptedAEADProtected.prototype.encrypt = async function (sessionKeyAlgorithm, key, asStream) {
this.cipherAlgo = enums.write(enums.symmetric, sessionKeyAlgorithm);
this.aeadAlgo = config.aead_protect_version === 4 ? enums.write(enums.aead, this.aeadAlgorithm) : enums.aead.experimental_gcm;
const mode = crypto[enums.read(enums.aead, this.aeadAlgo)];
this.iv = await crypto.random.getRandomBytes(mode.ivLength); // generate new random IV
this.chunkSizeByte = config.aead_chunk_size_byte;
const data = this.packets.write();
this.encrypted = await this.crypt('encrypt', key, data);
this.encrypted = await this.crypt('encrypt', key, data, asStream);
};
/**
@ -123,10 +125,11 @@ SymEncryptedAEADProtected.prototype.encrypt = async function (sessionKeyAlgorith
* @param {encrypt|decrypt} fn Whether to encrypt or decrypt
* @param {Uint8Array} key The session key used to en/decrypt the payload
* @param {Uint8Array | ReadableStream<Uint8Array>} data The data to en/decrypt
* @param {Boolean} asStream Whether the top-level function will return a stream
* @returns {Uint8Array | ReadableStream<Uint8Array>}
* @async
*/
SymEncryptedAEADProtected.prototype.crypt = async function (fn, key, data) {
SymEncryptedAEADProtected.prototype.crypt = async function (fn, key, data, asStream) {
const cipher = enums.read(enums.symmetric, this.cipherAlgo);
const mode = crypto[enums.read(enums.aead, this.aeadAlgo)];
const modeInstance = await mode(cipher, key);
@ -147,7 +150,7 @@ SymEncryptedAEADProtected.prototype.crypt = async function (fn, key, data) {
return stream.transformPair(data, async (readable, writable) => {
const reader = stream.getReader(readable);
const buffer = new TransformStream({}, {
highWaterMark: util.getHardwareConcurrency() * 2 ** (config.aead_chunk_size_byte + 6),
highWaterMark: asStream ? util.getHardwareConcurrency() * 2 ** (config.aead_chunk_size_byte + 6) : Infinity,
size: array => array.length
});
stream.pipe(buffer.readable, writable);