Document new publickey methods.
diff --git a/doc/api/crypto.rst b/doc/api/crypto.rst
index 95fb4df..41b659b 100644
--- a/doc/api/crypto.rst
+++ b/doc/api/crypto.rst
@@ -87,6 +87,13 @@
     *passphrase* must be either a string or a callback for providing the pass
     phrase.
 
+Public keys
+~~~~~~~~~~~
+
+.. autofunction:: dump_publickey
+
+.. autofunction:: load_publickey
+
 Certificate revocation lists
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~