32 lines
1004 B
Ruby
32 lines
1004 B
Ruby
# frozen_string_literal: true
|
|
|
|
# This implements an older draft of HTTP Signatures:
|
|
# https://datatracker.ietf.org/doc/html/draft-cavage-http-signatures
|
|
|
|
class HttpSignatureDraft
|
|
REQUEST_TARGET = '(request-target)'
|
|
|
|
def initialize(keypair, key_id, full_path: true)
|
|
@keypair = keypair
|
|
@key_id = key_id
|
|
@full_path = full_path
|
|
end
|
|
|
|
def request_target(verb, url)
|
|
if url.query.nil? || !@full_path
|
|
"#{verb} #{url.path}"
|
|
else
|
|
"#{verb} #{url.path}?#{url.query}"
|
|
end
|
|
end
|
|
|
|
def sign(signed_headers, verb, url)
|
|
signed_headers = signed_headers.merge(REQUEST_TARGET => request_target(verb, url))
|
|
signed_string = signed_headers.map { |key, value| "#{key.downcase}: #{value}" }.join("\n")
|
|
algorithm = 'rsa-sha256'
|
|
signature = Base64.strict_encode64(@keypair.sign(OpenSSL::Digest.new('SHA256'), signed_string))
|
|
|
|
"keyId=\"#{@key_id}\",algorithm=\"#{algorithm}\",headers=\"#{signed_headers.keys.join(' ').downcase}\",signature=\"#{signature}\""
|
|
end
|
|
end
|