From 8c2d4cf092c5f0335e7982392a33927579c4d512 Mon Sep 17 00:00:00 2001
From: Dong-hee Na <donghee.na92@gmail.com>
Date: Wed, 26 Jul 2017 21:11:25 +0900
Subject: [PATCH] [3.6] bpo-30119: fix ftplib.FTP.putline() to throw an error
 for a illegal command (#1214) (#2886)

---
 Lib/ftplib.py                                                     | 2 ++
 Lib/test/test_ftplib.py                                           | 6 +++++-
 Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst | 2 ++
 3 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst

diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index 8f36f537e8a..a02e595cb02 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -186,6 +186,8 @@ def sanitize(self, s):
 
     # Internal: send one line to the server, appending CRLF
     def putline(self, line):
+        if '\r' in line or '\n' in line:
+            raise ValueError('an illegal newline character should not be contained')
         line = line + CRLF
         if self.debugging > 1:
             print('*put*', self.sanitize(line))
diff --git a/Lib/test/test_ftplib.py b/Lib/test/test_ftplib.py
index 12fabc5e8be..a561e9efa03 100644
--- a/Lib/test/test_ftplib.py
+++ b/Lib/test/test_ftplib.py
@@ -484,6 +484,9 @@ def test_sanitize(self):
         self.assertEqual(self.client.sanitize('PASS 12345'), repr('PASS *****'))
 
     def test_exceptions(self):
+        self.assertRaises(ValueError, self.client.sendcmd, 'echo 40\r\n0')
+        self.assertRaises(ValueError, self.client.sendcmd, 'echo 40\n0')
+        self.assertRaises(ValueError, self.client.sendcmd, 'echo 40\r0')
         self.assertRaises(ftplib.error_temp, self.client.sendcmd, 'echo 400')
         self.assertRaises(ftplib.error_temp, self.client.sendcmd, 'echo 499')
         self.assertRaises(ftplib.error_perm, self.client.sendcmd, 'echo 500')
@@ -492,7 +495,8 @@ def test_exceptions(self):
 
     def test_all_errors(self):
         exceptions = (ftplib.error_reply, ftplib.error_temp, ftplib.error_perm,
-                      ftplib.error_proto, ftplib.Error, OSError, EOFError)
+                      ftplib.error_proto, ftplib.Error, OSError,
+                      EOFError)
         for x in exceptions:
             try:
                 raise x('exception not included in all_errors set')
diff --git a/Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst b/Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst
new file mode 100644
index 00000000000..a37d3703842
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2017-07-26-15-15-00.bpo-30119.DZ6C_S.rst
@@ -0,0 +1,2 @@
+ftplib.FTP.putline() now throws ValueError on commands that contains CR or
+LF. Patch by Dong-hee Na.