mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-25 13:58:15 -05:00
aa21c764d6
* gnu/packages/patches/python-pycrypto-CVE-2013-7459.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/python.scm (python-pycrypto, python2-pycrypto)[source]: Use the patch. Use pypi-uri.
97 lines
3.9 KiB
Diff
97 lines
3.9 KiB
Diff
Fix CVE-2013-7459:
|
|
|
|
https://github.com/dlitz/pycrypto/issues/176
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-7459
|
|
|
|
Copied from Debian:
|
|
|
|
https://anonscm.debian.org/cgit/collab-maint/python-crypto.git/commit/?id=0de2243837ed369a086f15c50cca2be85bdfab9d
|
|
|
|
Debian adapts this upstream commit:
|
|
|
|
https://github.com/dlitz/pycrypto/commit/8dbe0dc3eea5c689d4f76b37b93fe216cf1f00d4
|
|
|
|
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(-)
|
|
|
|
--- a/lib/Crypto/SelfTest/Cipher/common.py
|
|
+++ b/lib/Crypto/SelfTest/Cipher/common.py
|
|
@@ -239,19 +239,34 @@ 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)
|
|
|
|
+
|
|
class PGPTest(unittest.TestCase):
|
|
def __init__(self, module, params):
|
|
unittest.TestCase.__init__(self)
|
|
--- a/src/block_template.c
|
|
+++ b/src/block_template.c
|
|
@@ -170,6 +170,17 @@ ALGnew(PyObject *self, PyObject *args, P
|
|
"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,
|