Module hmac

hmac module perform Message Authentication Code operations.

It base on HMAC_CTX in OpenSSL v1.

Usage:

    hamc = require('openssl').hmac
    

Info:

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

Functions

new (alg, key[, engine]) get hamc_ctx object
hmac (digest, message, key, boolean) compute hmac one step, in module openssl.hamc

Class hmac_ctx

hmac_ctx:update (msg) feed data to do digest
hmac_ctx:final ([last[, raw]]) get result of hmac
hmac_ctx:size (msg) return size of mac value


Functions

new (alg, key[, engine])
get hamc_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:

    hamc_ctx hmac object mapping HMAC_CTX in openssl

See also:

hmac (digest, message, key, boolean)
compute hmac one step, in module openssl.hamc

Parameters:

  • digest evp_digest, string or nid digest alg identity
  • message string
  • key string
  • boolean (opt=false) raw

Returns:

    string result binary string

Class hmac_ctx

openssl.hmac_ctx object
hmac_ctx:update (msg)
feed data to do digest

Parameters:

hmac_ctx:final ([last[, raw]])
get result of hmac

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
hmac_ctx:size (msg)
return size of mac value

Parameters:

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