Module: AWS::Core::Signer

Defined in:

lib/aws/core/signer.rb

Overview

This module provides a #sign method that accepts a secret and a string to sign.

Class Method Summary

• .hmac(key, value, digest = 'sha256') ⇒ String

  Computes an HMAC digest of the passed string.

• .sign(secret, string_to_sign, digest_method = 'sha256') ⇒ String

  Signs a string using the credentials stored in memory.

Class Method Details

.hmac(key, value, digest = 'sha256') ⇒ String

Computes an HMAC digest of the passed string.

Parameters:

• key (String)
• value (String)
• digest (String) (defaults to: 'sha256') —

  (‘sha256’)

Returns:

• (String)

# File 'lib/aws/core/signer.rb', line 39

def hmac key, value, digest = 'sha256'
  OpenSSL::HMAC.digest(OpenSSL::Digest::Digest.new(digest), key, value)
end

.sign(secret, string_to_sign, digest_method = 'sha256') ⇒ String

Signs a string using the credentials stored in memory.

Parameters:

• secret (String) —

  Usually an AWS secret access key.

• string_to_sign (String) —

  The string to sign.

• digest_method (String) (defaults to: 'sha256') —

  The digest method to use when computing the HMAC digest.

Returns:

• (String) —

  Returns the computed signature.

# File 'lib/aws/core/signer.rb', line 29

def sign secret, string_to_sign, digest_method = 'sha256'
  Base64.encode64(hmac(secret, string_to_sign, digest_method)).strip
end