steam-crypto-esm v3.0.10

Node.js implementation of Steam connection crypto. This is a fork from @doctormckay/steam-crypto. Rewritten in Typescript with @types and converted to ESM Updated to use crypto .update() and cipher.final() instead of piped streams.

generateSessionKey(nonce)

• Generate a 32-byte symmetric sessionkey and encrypt it with Steam's public "System" key.
• nonce - If provided, will be appended to the sessionKey when encrypting.
• This is usually the webNonce provided by Steam CM upon on logon

symmetricEncryptWithHmacIv(data, sessionKey)

• Encrypt data with AES and prepend an HMAC IV
• This is the encryption protocol Steam uses in the client connection.

symmetricDecrypt(input, sessionKey)

• Decrypt the data from Steam

sha1(input, sessionKey)

• Hash input with sha1 algorithm