add gpg key model

1 files changed, 35 insertions, 0 deletions

diff --git a/app/models/gpg_key.rb b/app/models/gpg_key.rb
new file mode 100644
index 00000000000..16de0b542d7
--- /dev/null
+++ b/app/models/gpg_key.rb
@@ -0,0 +1,35 @@
+class GpgKey < ActiveRecord::Base
+  KEY_PREFIX = '-----BEGIN PGP PUBLIC KEY BLOCK-----'.freeze
+
+  belongs_to :user
+
+  validates :fingerprint,
+    presence: true,
+    uniqueness: true
+
+  validates :key,
+    presence: true,
+    uniqueness: true,
+    format: {
+      with: /\A#{KEY_PREFIX}((?!#{KEY_PREFIX}).)+\Z/m
+    }
+
+  before_validation :extract_fingerprint
+
+  def key=(value)
+    value.strip! unless value.blank?
+    write_attribute(:key, value)
+  end
+
+  private
+
+  def extract_fingerprint
+    import = GPGME::Key.import(key)
+
+    return if import.considered == 0
+
+    # we can assume that the result only contains one item as the validation
+    # only allows one key
+    self.fingerprint = import.imports.first.fingerprint
+  end
+end