1 files changed, 62 insertions, 0 deletions
diff --git a/app/lib/proof_provider/keybase/verifier.rb b/app/lib/proof_provider/keybase/verifier.rb
new file mode 100644
index 000000000..86f249dd7
--- /dev/null
+++ b/app/lib/proof_provider/keybase/verifier.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+class ProofProvider::Keybase::Verifier
+  def initialize(local_username, provider_username, token)
+    @local_username    = local_username
+    @provider_username = provider_username
+    @token             = token
+  end
+
+  def valid?
+    request = Request.new(:get, "#{ProofProvider::Keybase::BASE_URL}/_/api/1.0/sig/proof_valid.json", params: query_params)
+
+    request.perform do |res|
+      json = Oj.load(res.body_with_limit, mode: :strict)
+
+      if json.is_a?(Hash)
+        json.fetch('proof_valid', false)
+      else
+        false
+      end
+    end
+  rescue Oj::ParseError, HTTP::Error, OpenSSL::SSL::SSLError
+    false
+  end
+
+  def on_success_path(user_agent = nil)
+    url = Addressable::URI.parse("#{ProofProvider::Keybase::BASE_URL}/_/proof_creation_success")
+    url.query_values = query_params.merge(kb_ua: user_agent || 'unknown')
+    url.to_s
+  end
+
+  def status
+    request = Request.new(:get, "#{ProofProvider::Keybase::BASE_URL}/_/api/1.0/sig/proof_live.json", params: query_params)
+
+    request.perform do |res|
+      raise ProofProvider::Keybase::UnexpectedResponseError unless res.code == 200
+
+      json = Oj.load(res.body_with_limit, mode: :strict)
+
+      raise ProofProvider::Keybase::UnexpectedResponseError unless json.is_a?(Hash) && json.key?('proof_valid') && json.key?('proof_live')
+
+      json
+    end
+  rescue Oj::ParseError, HTTP::Error, OpenSSL::SSL::SSLError
+    raise ProofProvider::Keybase::UnexpectedResponseError
+  end
+
+  private
+
+  def query_params
+    {
+      domain: domain,
+      kb_username: @provider_username,
+      username: @local_username,
+      sig_hash: @token,
+    }
+  end
+
+  def domain
+    Rails.configuration.x.local_domain
+  end
+end