1 files changed, 4 insertions, 0 deletions
diff --git a/ext/openssl/lib/openssl/cipher.rb b/ext/openssl/lib/openssl/cipher.rb
index 049533d06b..45cf6ac93e 100644
--- a/ext/openssl/lib/openssl/cipher.rb
+++ b/ext/openssl/lib/openssl/cipher.rb
@@ -42,12 +42,16 @@ module OpenSSL
     }
 
     class Cipher
+      # Generate, set, and return a random key.
+      # You must call cipher.encrypt or cipher.decrypt before calling this method.
       def random_key
         str = OpenSSL::Random.random_bytes(self.key_len)
         self.key = str
         return str
       end
 
+      # Generate, set, and return a random iv.
+      # You must call cipher.encrypt or cipher.decrypt before calling this method.
       def random_iv
         str = OpenSSL::Random.random_bytes(self.iv_len)
         self.iv = str