Merge pull request #1189 from egze/enpass

Add support for Enpass - a password manager for secrets

lib/kamal/secrets/adapters/enpass.rb

@@ -0,0 +1,68 @@
+##
+# Enpass is different from most password managers, in a way that it's offline and doesn't need an account.
+#
+# Usage
+#
+# Fetch all password from FooBar item
+# `kamal secrets fetch --adapter enpass --from /Users/YOUR_USERNAME/Library/Containers/in.sinew.Enpass-Desktop/Data/Documents/Vaults/primary FooBar`
+#
+# Fetch only DB_PASSWORD from FooBar item
+# `kamal secrets fetch --adapter enpass --from /Users/YOUR_USERNAME/Library/Containers/in.sinew.Enpass-Desktop/Data/Documents/Vaults/primary FooBar/DB_PASSWORD`
+class Kamal::Secrets::Adapters::Enpass < Kamal::Secrets::Adapters::Base
+  def fetch(secrets, account: nil, from:)
+    check_dependencies!
+    fetch_secrets(secrets, from)
+  end
+
+  private
+    def fetch_secrets(secrets, vault)
+      secrets_titles = fetch_secret_titles(secrets)
+
+      result = `enpass-cli -json -vault #{vault.shellescape} show #{secrets_titles.map(&:shellescape).join(" ")}`.strip
+
+      parse_result_and_take_secrets(result, secrets)
+    end
+
+    def check_dependencies!
+      raise RuntimeError, "Enpass CLI is not installed" unless cli_installed?
+    end
+
+    def cli_installed?
+      `enpass-cli version 2> /dev/null`
+      $?.success?
+    end
+
+    def fetch_secret_titles(secrets)
+      secrets.reduce(Set.new) do |secret_titles, secret|
+        # Sometimes secrets contain a '/', when the intent is to fetch a single password for an item. Example: FooBar/DB_PASSWORD
+        # Another case is, when the intent is to fetch all passwords for an item. Example: FooBar (and FooBar may have multiple different passwords)
+        key, separator, value = secret.rpartition("/")
+        if key.empty?
+          secret_titles << value
+        else
+          secret_titles << key
+        end
+      end.to_a
+    end
+
+    def parse_result_and_take_secrets(unparsed_result, secrets)
+      result = JSON.parse(unparsed_result)
+
+      result.reduce({}) do |secrets_with_passwords, item|
+        title = item["title"]
+        label = item["label"]
+        password = item["password"]
+
+        if title && password.present?
+          key = [ title, label ].compact.reject(&:empty?).join("/")
+
+          if secrets.include?(title) || secrets.include?(key)
+            raise RuntimeError, "#{key} is present more than once" if secrets_with_passwords[key]
+            secrets_with_passwords[key] = password
+          end
+        end
+
+        secrets_with_passwords
+      end
+    end
+end