@doctormckay/steam-crypto
v1.2.0
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Node.js implementation of Valve's crypto
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node-steam-crypto
Node.js implementation of Steam crypto. All keys, data, and signatures are passed as Buffers.
Fork of, and compatible with, steam-crypto.
verifySignature(data, signature[, algorithm])
Verifies an RSA signature using the Steam system's public key. algorithm
defaults to "RSA-SHA1". Returns true
if the signature is valid, or false
if not.
generateSessionKey([nonce])
nonce
- If you were prompted by Steam with a nonce, provide it here (as a Buffer)
Generates a 32 byte random blob of data and encrypts it with RSA using the Steam system's public key. Returns an object with the following properties:
plain
- the generated session keyencrypted
- the encrypted session key
If you provided a nonce, then encrypted
is the RSA'd concatenation of the session key and the nonce (in that order).
symmetricEncrypt(input, sessionKey[, iv])
Encrypts input
using sessionKey
and iv
(or a securely-random IV if you don't provide one) and returns the result.
symmetricEncryptWithHmacIv(input, sessionKey)
Encrypts input
using sessionKey
and an IV which is partially comprised of an HMAC of the input
.
symmetricDecrypt(input, sessionKey[, checkHmac])
Decrypts input
using sessionKey
and returns the result.
If the IV in this ciphertext contains an HMAC, pass true
for checkHmac
and it will be validated. Otherwise, it will
not be validated (default behavior).
symmetricDecryptECB(input, sessionKey)
Decrypts input
using sessionKey
and the AES/ECB/PKCS7 cipher without an IV and returns the result.