1 files changed, 3 insertions, 0 deletions
diff --git a/M2Crypto/RSA.py b/M2Crypto/RSA.py
index c1d18cd..1292e1d 100644
--- a/M2Crypto/RSA.py
+++ b/M2Crypto/RSA.py
@@ -180,6 +180,9 @@ class RSA(object):
     def check_key(self):
         # type: () -> int
         """
+        Validate RSA keys.
+
+        It checks that p and q are in fact prime, and that n = p*q.
 
         :return: returns 1 if rsa is a valid RSA key, and 0 otherwise.
                  -1 is returned if an error occurs while checking the key.