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Add Digest header to requests with body, handle acct and URI keyId (#4565)

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Eugen Rochko 2017-08-09 23:54:14 +02:00 • committed by GitHub
commit fdea173237
3 changed files with 100 additions and 25 deletions
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23
app/controllers/concerns/signature_verification.rb
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@ -31,7 +31,7 @@ module SignatureVerification
return
end
account = ResolveRemoteAccountService.new.call(signature_params['keyId'].gsub(/\Aacct:/, ''))
account = account_from_key_id(signature_params['keyId'])
if account.nil?
@signed_request_account = nil
@ -49,6 +49,10 @@ module SignatureVerification
end
end
def request_body
@request_body ||= request.raw_post
end
private
def build_signed_string(signed_headers)
@ -57,6 +61,8 @@ module SignatureVerification
signed_headers.split(' ').map do |signed_header|
if signed_header == Request::REQUEST_TARGET
"#{Request::REQUEST_TARGET}: #{request.method.downcase} #{request.path}"
elsif signed_header == 'digest'
"digest: #{body_digest}"
else
"#{signed_header}: #{request.headers[to_header_name(signed_header)]}"
end
@ -73,6 +79,10 @@ module SignatureVerification
(Time.now.utc - time_sent).abs <= 30
end
def body_digest
"SHA-256=#{Digest::SHA256.base64digest(request_body)}"
end
def to_header_name(name)
name.split(/-/).map(&:capitalize).join('-')
end
@ -81,7 +91,14 @@ module SignatureVerification
signature_params['keyId'].blank? ||
signature_params['signature'].blank? ||
signature_params['algorithm'].blank? ||
signature_params['algorithm'] != 'rsa-sha256' ||
!signature_params['keyId'].start_with?('acct:')
signature_params['algorithm'] != 'rsa-sha256'
end
def account_from_key_id(key_id)
if key_id.start_with?('acct:')
ResolveRemoteAccountService.new.call(key_id.gsub(/\Aacct:/, ''))
elsif !ActivityPub::TagManager.instance.local_uri?(key_id)
ActivityPub::FetchRemoteAccountService.new.call(key_id)
end
end
end