tui/SOURCES/pycrypto-2.6.1-CVE-2013-7459.patch

From 8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4 Mon Sep 17 00:00:00 2001
From: Legrandin <helderijs@gmail.com>
Date: Sun, 22 Dec 2013 22:24:46 +0100
Subject: [PATCH] Throw exception when IV is used with ECB or CTR

The IV parameter is currently ignored when initializing
a cipher in ECB or CTR mode.

For CTR mode, it is confusing: it takes some time to see
that a different parameter is needed (the counter).

For ECB mode, it is outright dangerous.

This patch forces an exception to be raised.
---
 lib/Crypto/SelfTest/Cipher/common.py | 31 +++++++++++++++++++++++--------
 src/block_template.c                 | 11 +++++++++++
 2 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/lib/Crypto/SelfTest/Cipher/common.py b/lib/Crypto/SelfTest/Cipher/common.py
index 420b6ff..a5f8a88 100644
--- a/lib/Crypto/SelfTest/Cipher/common.py
+++ b/lib/Crypto/SelfTest/Cipher/common.py
@@ -239,16 +239,30 @@ class RoundtripTest(unittest.TestCase):
         return """%s .decrypt() output of .encrypt() should not be garbled""" % (self.module_name,)
 
     def runTest(self):
-        for mode in (self.module.MODE_ECB, self.module.MODE_CBC, self.module.MODE_CFB, self.module.MODE_OFB, self.module.MODE_OPENPGP):
+
+        ## ECB mode
+        mode = self.module.MODE_ECB
+        encryption_cipher = self.module.new(a2b_hex(self.key), mode)
+        ciphertext = encryption_cipher.encrypt(self.plaintext)
+        decryption_cipher = self.module.new(a2b_hex(self.key), mode)
+        decrypted_plaintext = decryption_cipher.decrypt(ciphertext)
+        self.assertEqual(self.plaintext, decrypted_plaintext)
+
+        ## OPENPGP mode
+        mode = self.module.MODE_OPENPGP
+        encryption_cipher = self.module.new(a2b_hex(self.key), mode, self.iv)
+        eiv_ciphertext = encryption_cipher.encrypt(self.plaintext)
+        eiv = eiv_ciphertext[:self.module.block_size+2]
+        ciphertext = eiv_ciphertext[self.module.block_size+2:]
+        decryption_cipher = self.module.new(a2b_hex(self.key), mode, eiv)
+        decrypted_plaintext = decryption_cipher.decrypt(ciphertext)
+        self.assertEqual(self.plaintext, decrypted_plaintext)
+
+        ## All other non-AEAD modes (but CTR)
+        for mode in (self.module.MODE_CBC, self.module.MODE_CFB, self.module.MODE_OFB):
             encryption_cipher = self.module.new(a2b_hex(self.key), mode, self.iv)
             ciphertext = encryption_cipher.encrypt(self.plaintext)
-            
-            if mode != self.module.MODE_OPENPGP:
-                decryption_cipher = self.module.new(a2b_hex(self.key), mode, self.iv)
-            else:
-                eiv = ciphertext[:self.module.block_size+2]
-                ciphertext = ciphertext[self.module.block_size+2:]
-                decryption_cipher = self.module.new(a2b_hex(self.key), mode, eiv)
+            decryption_cipher = self.module.new(a2b_hex(self.key), mode, self.iv)
             decrypted_plaintext = decryption_cipher.decrypt(ciphertext)
             self.assertEqual(self.plaintext, decrypted_plaintext)
 
diff --git a/src/block_template.c b/src/block_template.c
index f940e0e..d555ceb 100644
--- a/src/block_template.c
+++ b/src/block_template.c
@@ -170,6 +170,17 @@ ALGnew(PyObject *self, PyObject *args, PyObject *kwdict)
 				"Key cannot be the null string");
 		return NULL;
 	}
+	if (IVlen != 0 && mode == MODE_ECB)
+	{
+		PyErr_Format(PyExc_ValueError, "ECB mode does not use IV");
+		return NULL;
+	}
+	if (IVlen != 0 && mode == MODE_CTR)
+	{
+		PyErr_Format(PyExc_ValueError,
+			"CTR mode needs counter parameter, not IV");
+		return NULL;
+	}
 	if (IVlen != BLOCK_SIZE && mode != MODE_ECB && mode != MODE_CTR)
 	{
 		PyErr_Format(PyExc_ValueError,
From 58de28a5d32bc10e15766e5a59f41b07397cc6cb Mon Sep 17 00:00:00 2001
From: Richard Mitchell <richard.j.mitchell@gmail.com>
Date: Mon, 28 Apr 2014 16:58:27 +0100
Subject: [PATCH] Fix speedtest run for ECB modes.

---
 pct-speedtest.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pct-speedtest.py b/pct-speedtest.py
index 4ce18be..c7b893a 100644
--- a/pct-speedtest.py
+++ b/pct-speedtest.py
@@ -121,6 +121,8 @@ class Benchmark:
         blocks = self.random_blocks(16384, 1000)
         if mode is None:
             cipher = module.new(key)
+        elif mode==module.MODE_ECB:
+            cipher = module.new(key, module.MODE_ECB)
         else:
             cipher = module.new(key, mode, iv)