Class: OpenSSL::HMACError (Ruby 2.4.2)
Description: Class : OpenSSL::HMACError - Ruby 2.4.2

Support for the Ruby 2.4 series has ended. See here for reference.

### Home Classes Methods

### In Files

- openssl/ossl.c

### Parent

OpenSSL::OpenSSLError

### Class/Module Index

Quicksearch

- IO
- IO::WaitReadable
- IO::WaitWritable
- Integer
- OpenSSL
- OpenSSL::ASN1
- OpenSSL::ASN1::ASN1Data
- OpenSSL::ASN1::ASN1Error
- OpenSSL::ASN1::Constructive
- OpenSSL::ASN1::ObjectId
- OpenSSL::ASN1::Primitive
- OpenSSL::BN
- OpenSSL::BNError
- OpenSSL::Buffering
- OpenSSL::Cipher
- OpenSSL::Cipher::Cipher
- OpenSSL::Cipher::CipherError
- OpenSSL::Config
- OpenSSL::ConfigError
- OpenSSL::Digest
- OpenSSL::Digest::DigestError
- OpenSSL::Engine
- OpenSSL::Engine::EngineError
- OpenSSL::ExtConfig
- OpenSSL::HMAC
- OpenSSL::HMACError
- OpenSSL::Netscape
- OpenSSL::Netscape::SPKI
- OpenSSL::Netscape::SPKIError
- OpenSSL::OCSP
- OpenSSL::OCSP::BasicResponse
- OpenSSL::OCSP::CertificateId
- OpenSSL::OCSP::OCSPError
- OpenSSL::OCSP::Request
- OpenSSL::OCSP::Response
- OpenSSL::OCSP::SingleResponse
- OpenSSL::OpenSSLError
- OpenSSL::PKCS12
- OpenSSL::PKCS12::PKCS12Error
- OpenSSL::PKCS5
- OpenSSL::PKCS5::PKCS5Error
- OpenSSL::PKCS7
- OpenSSL::PKCS7::PKCS7Error
- OpenSSL::PKCS7::RecipientInfo
- OpenSSL::PKCS7::SignerInfo
- OpenSSL::PKey
- OpenSSL::PKey::DH
- OpenSSL::PKey::DHError
- OpenSSL::PKey::DSA
- OpenSSL::PKey::DSAError
- OpenSSL::PKey::EC
- OpenSSL::PKey::EC::Group
- OpenSSL::PKey::EC::Group::Error
- OpenSSL::PKey::EC::Point
- OpenSSL::PKey::EC::Point::Error
- OpenSSL::PKey::ECError
- OpenSSL::PKey::PKey
- OpenSSL::PKey::PKeyError
- OpenSSL::PKey::RSA
- OpenSSL::PKey::RSAError
- OpenSSL::Random
- OpenSSL::Random::RandomError
- OpenSSL::SSL
- OpenSSL::SSL::SSLContext
- OpenSSL::SSL::SSLError
- OpenSSL::SSL::SSLErrorWaitReadable
- OpenSSL::SSL::SSLErrorWaitWritable
- OpenSSL::SSL::SSLServer
- OpenSSL::SSL::SSLSocket
- OpenSSL::SSL::Session
- OpenSSL::SSL::Session::SessionError
- OpenSSL::SSL::SocketForwarder
- OpenSSL::X509
- OpenSSL::X509::Attribute
- OpenSSL::X509::AttributeError
- OpenSSL::X509::CRL
- OpenSSL::X509::CRLError
- OpenSSL::X509::Certificate
- OpenSSL::X509::CertificateError
- OpenSSL::X509::Extension
- OpenSSL::X509::ExtensionError
- OpenSSL::X509::ExtensionFactory
- OpenSSL::X509::Name
- OpenSSL::X509::Name::RFC2253DN
- OpenSSL::X509::NameError
- OpenSSL::X509::Request
- OpenSSL::X509::RequestError
- OpenSSL::X509::Revoked
- OpenSSL::X509::RevokedError
- OpenSSL::X509::Store
- OpenSSL::X509::StoreContext
- OpenSSL::X509::StoreError

No matching classes.

# OpenSSL::HMACError

Document-class: `OpenSSL::HMAC`

`OpenSSL::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.

`OpenSSL::HMAC` has a similar interface to `OpenSSL::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::SHA256.new
    hmac = OpenSSL::HMAC.new(key, digest)
    hmac << data1
    hmac << data2
    mac = hmac.digest