Issue 12139: add CCC command support to FTP_TLS class to revert the SSL connection back to clear-text.

1 files changed, 8 insertions, 0 deletions

diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index d15a135..eaaa6fd 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -708,6 +708,14 @@ else:
             self.file = self.sock.makefile(mode='r', encoding=self.encoding)
             return resp
 
+        def ccc(self):
+            '''Switch back to a clear-text control connection.'''
+            if not isinstance(self.sock, ssl.SSLSocket):
+                raise ValueError("not using TLS")
+            resp = self.voidcmd('CCC')
+            self.sock = self.sock.unwrap()
+            return resp
+
         def prot_p(self):
             '''Set up secure data connection.'''
             # PROT defines whether or not the data channel is to be protected.