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crypto Module

Since	Origin / Contributor	Maintainer	Source
2019-01-13	Javier Peletier	Javier Peletier	crypto.c

The crypto module provides various functions for working with cryptographic algorithms.

This is work in progress, for now only a number of hashing functions are available:

SHA1
SHA256
SHA224
SHA512
SHA384
MD5

All except MD5 are enabled by default. To disable algorithms you don't need, find the "Crypto module hashing algorithms" under the NodeMCU modules section in menuconfig.

crypto.new_hash()

Create a digest/hash object that can have any number of strings added to it. Object has update and finalize functions.

Syntax

hashobj = crypto.new_hash(algo)

Parameters

algo the hash algorithm to use, case insensitive string

Returns

Hasher object with update and finalize functions available.

Example

hashobj = crypto.new_hash("SHA1")
hashobj:update("FirstString"))
hashobj:update("SecondString"))
digest = hashobj:finalize()
print(encoder.toHex(digest))

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