Crypt — Velocity

crypt.random(size: number) → string

Cryptographically-random bytes via BCryptGenRandom.

lua

local iv = crypt.random(16)   -- 16 random bytes

crypt.generatebytes(size: number) → string

Random bytes returned as base64.

lua

print(crypt.generatebytes(32))

crypt.generatekey() → string

32-byte base64-encoded AES key.

lua

local key = crypt.generatekey()
writefile("key.b64", key)

crypt.hash(data: string, algorithm: string) → string

Hex digest. Algorithms: md5, sha1, sha256, sha384, sha512.

lua

print(crypt.hash("hello", "sha256"))
--> 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824

crypt.hmac(data: string, key: string, algorithm: string) → string

HMAC hex digest (RFC 2104). Key may be raw or hex.

lua

print(crypt.hmac("data", "secret", "sha256"))

crypt.encrypt(data: string, key: string, iv: string?, mode: string?) → string, string

AES-256 encrypt. Returns (ciphertext, iv).

lua

local key = crypt.generatekey()
local ct, iv = crypt.encrypt("hello world", key)

crypt.decrypt(data: string, key: string, iv: string, mode: string?) → string

AES-256 decrypt.

lua

print(crypt.decrypt(ct, key, iv))  --> hello world

crypt.base64encode(data: string) → string

Base64 encode.

aliasescrypt.base64_encode, crypt.encode, base64encode (global), base64_encode (global), base64.encode

lua

print(crypt.base64encode("hello"))  --> aGVsbG8=

crypt.base64decode(data: string) → string

Base64 decode.

aliasescrypt.base64_decode, crypt.decode, base64decode (global), base64_decode (global), base64.decode

lua

print(crypt.base64decode("aGVsbG8="))  --> hello

crypt.lz4compress(data: string) → string

LZ4 compress. Also exposed as top-level lz4compress.

lua

local packed = crypt.lz4compress(("a"):rep(1000))
print(#packed)  --> ~20

crypt.lz4decompress(data: string, decompressedSize: number) → string

LZ4 decompress. Also exposed as top-level lz4decompress.

lua

local original = crypt.lz4decompress(packed, 1000)
print(#original)  --> 1000