Exception: OpenSSL::HMACError
| Relationships & Source Files | |
| Super Chains via Extension / Inclusion / Inheritance | |
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Class Chain:
self,
OpenSSLError,
::StandardError,
Exception
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Instance Chain:
self,
OpenSSLError,
::StandardError,
Exception
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| Inherits: |
OpenSSL::OpenSSLError
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| Defined in: | ext/openssl/ossl_hmac.c |
Overview
HMAC allows computing Hash-based Message Authentication Code (HMAC). It is a type of message authentication code (MAC) involving a hash function in combination with a key. HMAC can be used to verify the integrity of a message as well as the authenticity.
HMAC has a similar interface to Digest.
HMAC-SHA256 using one-shot interface
key = "key"
data = "message-to-be-authenticated"
mac = OpenSSL::HMAC.hexdigest("SHA256", key, data)
#=> "cddb0db23f469c8bf072b21fd837149bd6ace9ab771cceef14c9e517cc93282e"HMAC-SHA256 using incremental interface
data1 = File.read("file1")
data2 = File.read("file2")
key = "key"
digest = OpenSSL::Digest.new('SHA256')
hmac = OpenSSL::HMAC.new(key, digest)
hmac << data1
hmac << data2
mac = hmac.digest