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Bug#850003: marked as done (jessie-pu: package python-cryptography/0.6.1-1+deb8u1)

Your message dated Sat, 06 May 2017 14:44:18 +0100
with message-id <1494078258.26551.13.camel@adam-barratt.org.uk>
and subject line Closing bugs for updates included in 8.8
has caused the Debian Bug report #850003,
regarding jessie-pu: package python-cryptography/0.6.1-1+deb8u1
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
850003: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850003
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: release.debian.org
Severity: normal
Tags: jessie
User: release.debian.org@packages.debian.org
Usertags: pu

Backport the fix for CVE-2016-9243 which was deemed not severe enough for a
DSA. I've attached a full debdiff, the patch is quite small and self-contained,
although I needed another patch to fix building against the libssl now in
jessie.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), (101, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.8.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_ZA.utf8, LC_CTYPE=en_ZA.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

diff -Nru python-cryptography-0.6.1/debian/changelog python-cryptography-0.6.1/debian/changelog
--- python-cryptography-0.6.1/debian/changelog	2014-10-16 06:46:31.000000000 +0200
+++ python-cryptography-0.6.1/debian/changelog	2017-01-01 22:19:17.000000000 +0200
@@ -1,3 +1,12 @@
+python-cryptography (0.6.1-1+deb8u1) stable; urgency=high
+
+  * Stable update.
+  * Backport the fix for CVE-2016-9243 (HKDF returns an empty byte string
+    for small key sizes).
+  * Fix FTBFS due to SSL2 method detection.
+
+ -- Tristan Seligmann <mithrandi@debian.org>  Sun, 01 Jan 2017 22:19:17 +0200
+
 python-cryptography (0.6.1-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru python-cryptography-0.6.1/debian/patches/3215.patch python-cryptography-0.6.1/debian/patches/3215.patch
--- python-cryptography-0.6.1/debian/patches/3215.patch	1970-01-01 02:00:00.000000000 +0200
+++ python-cryptography-0.6.1/debian/patches/3215.patch	2017-01-01 22:19:17.000000000 +0200
@@ -0,0 +1,40 @@
+From d945a5213f2b2bbb189bbc2be407aa35e0dab204 Mon Sep 17 00:00:00 2001
+From: Alex Gaynor <alex.gaynor@gmail.com>
+Date: Sat, 5 Nov 2016 21:18:15 -0400
+Subject: [PATCH] Fixes #3211 -- fixed hkdf's output with short length
+
+Index: python-cryptography/cryptography/hazmat/primitives/kdf/hkdf.py
+===================================================================
+--- python-cryptography.orig/cryptography/hazmat/primitives/kdf/hkdf.py	2017-01-01 22:24:27.090828930 +0200
++++ python-cryptography/cryptography/hazmat/primitives/kdf/hkdf.py	2017-01-01 22:24:27.086828861 +0200
+@@ -99,7 +99,7 @@
+         output = [b""]
+         counter = 1
+ 
+-        while (self._algorithm.digest_size // 8) * len(output) < self._length:
++        while self._algorithm.digest_size * (len(output) - 1) < self._length:
+             h = hmac.HMAC(key_material, self._algorithm, backend=self._backend)
+             h.update(output[-1])
+             h.update(self._info)
+Index: python-cryptography/tests/hazmat/primitives/test_hkdf.py
+===================================================================
+--- python-cryptography.orig/tests/hazmat/primitives/test_hkdf.py	2017-01-01 22:24:27.090828930 +0200
++++ python-cryptography/tests/hazmat/primitives/test_hkdf.py	2017-01-01 22:24:27.086828861 +0200
+@@ -152,6 +152,17 @@
+ 
+             hkdf.verify(b"foo", six.u("bar"))
+ 
++    def test_derive_short_output(self, backend):
++        hkdf = HKDF(
++            hashes.SHA256(),
++            4,
++            salt=None,
++            info=None,
++            backend=backend
++        )
++
++        assert hkdf.derive(b"\x01" * 16) == b"gJ\xfb{"
++
+ 
+ @pytest.mark.hmac
+ class TestHKDFExpand(object):
diff -Nru python-cryptography-0.6.1/debian/patches/series python-cryptography-0.6.1/debian/patches/series
--- python-cryptography-0.6.1/debian/patches/series	1970-01-01 02:00:00.000000000 +0200
+++ python-cryptography-0.6.1/debian/patches/series	2017-01-01 22:19:17.000000000 +0200
@@ -0,0 +1,2 @@
+ssl2-detection.patch
+3215.patch
diff -Nru python-cryptography-0.6.1/debian/patches/ssl2-detection.patch python-cryptography-0.6.1/debian/patches/ssl2-detection.patch
--- python-cryptography-0.6.1/debian/patches/ssl2-detection.patch	1970-01-01 02:00:00.000000000 +0200
+++ python-cryptography-0.6.1/debian/patches/ssl2-detection.patch	2017-01-01 22:19:17.000000000 +0200
@@ -0,0 +1,13 @@
+Index: python-cryptography/cryptography/hazmat/bindings/openssl/ssl.py
+===================================================================
+--- python-cryptography.orig/cryptography/hazmat/bindings/openssl/ssl.py	2017-01-01 22:33:41.640198755 +0200
++++ python-cryptography/cryptography/hazmat/bindings/openssl/ssl.py	2017-01-01 22:34:20.336845122 +0200
+@@ -384,7 +384,7 @@
+ #else
+ static const long Cryptography_HAS_SECURE_RENEGOTIATION = 1;
+ #endif
+-#ifdef OPENSSL_NO_SSL2
++#ifdef OPENSSL_NO_SSL2_METHOD
+ static const long Cryptography_HAS_SSL2 = 0;
+ SSL_METHOD* (*SSLv2_method)(void) = NULL;
+ SSL_METHOD* (*SSLv2_client_method)(void) = NULL;

--- End Message ---
--- Begin Message --- 
Version: 8.8

Hi,

Each of these bugs refers to an update that was included in today's
jessie point release. Thanks!

Regards,

Adam

--- End Message ---
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