ChaCha20.md

Class: ChaCha20

Implementation of the ChaCha20 cipher.

Table of contents

Constructors

• constructor

Methods

• encrypt
• decrypt
• keyStream

Constructors

constructor

• new ChaCha20(key, nonce, counter?)

Create a new instance of ChaCha20.

Parameters

Name	Type	Default value	Description
key	Uint8Array	undefined	The key.
nonce	Uint8Array	undefined	The nonce.
counter	number	0	Counter.

Methods

encrypt

▸ encrypt(data): Uint8Array

Encrypt the data.

Parameters

Name	Type	Description
data	Uint8Array	The source data to encrypt.

Returns

Uint8Array

The encrypted data.

---

decrypt

▸ decrypt(data): Uint8Array

Decrypt the data.

Parameters

Name	Type	Description
data	Uint8Array	The source data to decrypt.

Returns

Uint8Array

The decrypted data.

---

keyStream

▸ keyStream(length): Uint8Array

Create a keystream of the given length.

Parameters

Name	Type	Description
length	number	The length to create the keystream.

Returns

Uint8Array

The keystream.