Module mac

mac module perform Message Authentication Code operations.

It base on EVP_MAC in OpenSSL v3.

Usage:

    hamc = require('openssl').mac
    

Info:

  • Author: george zhao <zhaozg(at)gmail.com>

Functions

new (alg, key[, engine]) get mac_ctx object
mac (digest, message, key) compute mac one step, in module openssl.hamc
update (msg) feed data to do digest
final ([last[, raw]]) get result of mac
size (msg) return size of mac value


Functions

new (alg, key[, engine])
get mac_ctx object

Parameters:

  • alg string, integer or asn1_object name, nid or object identity
  • key string secret key
  • engine engine , nothing with default engine (optional)

Returns:

    mac_ctx object mapping MAC_CTX in openssl
mac (digest, message, key)
compute mac one step, in module openssl.hamc

Parameters:

Returns:

    string result binary string
update (msg)
feed data to do digest

Parameters:

final ([last[, raw]])
get result of mac

Parameters:

  • last string last part of data (optional)
  • raw boolean binary or hex encoded result, default true for binary result (optional)

Returns:

    string val hash result
size (msg)
return size of mac value

Parameters:

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