gnu: python-axolotl: Update to 0.1.39 and fix build.

python-axolotl has been failing since March,
https://hydra.gnu.org/job/gnu/master/python-axolotl-0.1.35.x86_64-linux

This also fixes the OMEMO and OTR plugins for Gajim work.

* gnu/packages/patches/python-axolotl-AES-fix.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/python-crypto.scm (python-axolotl): Upgrade to 0.1.39.
[source]: Use the patch.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/local.mk

@@ -1017,6 +1017,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/python-3-search-paths.patch		\
   %D%/packages/patches/python-3.5-fix-tests.patch		\
   %D%/packages/patches/python-3.5-getentropy-on-old-kernels.patch	\
+  %D%/packages/patches/python-axolotl-AES-fix.patch		\
   %D%/packages/patches/python-dendropy-fix-tests.patch		\
   %D%/packages/patches/python-fix-tests.patch			\
   %D%/packages/patches/python-genshi-add-support-for-python-3.4-AST.patch	\

gnu/packages/patches/python-axolotl-AES-fix.patch

@@ -0,0 +1,24 @@
+Patch taken from the Debian package for python-axolotl-0.1.39.
+See <https://bugs.gnu.org/29415>.
+
+Description: Removes IV paramenter from AES constructor, since it is not necessary for ctr mode.
+Author: Josue Ortega <josue@debian.org>
+Last-Update: 2017-04-13
+
+--- a/axolotl/sessioncipher.py
++++ b/axolotl/sessioncipher.py
+@@ -228,13 +228,7 @@
+         # counterint = struct.unpack(">L", counterbytes)[0]
+         # counterint = int.from_bytes(counterbytes, byteorder='big')
+         ctr = Counter.new(128, initial_value=counter)
+-
+-        # cipher = AES.new(key, AES.MODE_CTR, counter=ctr)
+-        ivBytes = bytearray(16)
+-        ByteUtil.intToByteArray(ivBytes, 0, counter)
+-
+-        cipher = AES.new(key, AES.MODE_CTR, IV=bytes(ivBytes), counter=ctr)
+-
++        cipher = AES.new(key, AES.MODE_CTR, counter=ctr)
+         return cipher
+ 
+ 

gnu/packages/python-crypto.scm

@@ -450,7 +450,7 @@ python-axolotl.")
 (define-public python-axolotl
   (package
     (name "python-axolotl")
-    (version "0.1.35")
+    (version "0.1.39")
     (source
      (origin
        (method url-fetch)
@@ -458,8 +458,9 @@ python-axolotl.")
              "https://github.com/tgalal/python-axolotl/archive/"
              version ".tar.gz"))
        (file-name (string-append name "-" version ".tar.gz"))
+       (patches (search-patches "python-axolotl-AES-fix.patch"))
        (sha256
-        (base32 "1z8d89p7v40p4bwywjm9h4z28fdvra79ddw06azlkrfjbl7dxmz8"))))
+        (base32 "0badsgkgz0ir3hqynxzsfjgacppi874syvvmgccc6j164053x6zm"))))
     (build-system python-build-system)
     (arguments
      `(#:phases