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Crypto Functions

Functions regarding cryptography, implemented by Pluto.

Hashing Algorithms​

Lua​

Hash a string using Lua's version of the DJB2 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.lua(str) == 2871868277)

MD5​

Hash a string using the MD5 semi-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.md5(str) == "5eb63bbbe01eeed093cb22bb8f5acdc3")

DJB2​

Hash a string using the DJB2 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.djb2(str) == 894552257)

FNV1​

Hash a string using the FNV1 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.fnv1(str) == 9065573210506989167)

JOAAT​

Hash a string using the JOAAT non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.joaat(str) == 1045060183)

SDBM​

Hash a string using the SDBM non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.sdbm(str) == 430867652)

FNV1A​

Hash a string using the FNV1A non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.fnv1a(str) == 8618312879776256743)

CRC32​

Hash a string using the CRC32 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.
  2. The initial value for the hash. By default, this is zero.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.crc32(str) == 222957957)

Lookup3​

Hash a string using the Lookup3 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.lookup3(str) == 1252609637)

Times33​

Hash a string using the Times33 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.times33(str) == 3889643616)

SHA-256​

Hash a string using the SHA-256 cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.sha256(str) == "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9")

Murmur1​

Hash a string using the Murmur1 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.murmur1(str) == 3154674178)

Murmur2​

Hash a string using the Murmur2 non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.murmur2(str) == 1151865881)

Murmur2A​

Hash a string using the Murmur2A non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.murmur2a(str) == 2650573207)

Murmur64A​

Hash a string using the Murmur64A non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.murmur64a(str) == -3190198453633110066)

Murmur64B​

Hash a string using the Murmur64A non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.murmur64b(str) == 7088720765356542432)

Murmur2Neutral​

Hash a string using the Murmur2Neutral non-cryptographic hashing algorithm.

Parameters​

  1. The string to hash.

Example​

local crypto = require("crypto")local str = "hello"assert(crypto.murmur2neutral(str) == 1151865881)

PRNGs​

random​

The crypto.random function uses your operating system's default PRNG.

  • On Linux-based systems, this is /dev/urandom.
  • On Windows, this is BCryptGenRandom.

This is a cryptographically-secure PRNG when your system can provide those services. However, if it does not, then this is not cryptographically secure. Either way, it provides good randomness.

Parameters​

  1. The minimum value to return.
  2. The maximum value to return, as a range.

Example​

local crypto = require("crypto")assert(crypto.random(1, 10) < 11)

Misc Functions​

hexdigest​

Converts an integer into its hexadecimal representation, as a string.

Parameters​

  1. The string to convert.

Example​

local crypto = require("crypto")
local hash = crypto.joaat("hello world")
print("hash: " .. hash)
print("digest: " .. crypto.hexdigest(hash))
--[[
    hash: 1045060183
    digest: "0x3e4a5a57"
--]]
assert(tonumber(crypto.hexdigest(hash)) == hash)