xmlsec on el capitan - osx-elcapitan

Question

I'm trying to install xmlsec on El Capitan and i'm not able to do so.
I'm following instructions on this page:
https://github.com/concordusapps/python-xmlsec
when I do pip install xmlsec I get:
Downloading xmlsec-0.3.1.tar.gz
Complete output from command python setup.py egg_info:
no previously-included directories found matching 'doc/.build'
Installed /private/tmp/easy_install-kotwF5/pkgconfig-1.1.0/.eggs/nose-1.3.7-py2.7.egg
zip_safe flag not set; analyzing archive contents...
Installed /private/tmp/pip-build-my91LX/xmlsec/.eggs/pkgconfig-1.1.0-py2.7.egg
Searching for setuptools-cython
Reading https://pypi.python.org/simple/setuptools_cython/
Best match: setuptools-cython 0.2.1
Downloading https://pypi.python.org/packages/source/s/setuptools_cython/setuptools_cython-0.2.1.tar.gz#md5=c29fc5bf2894e69cbd98e3800cef4707
Processing setuptools_cython-0.2.1.tar.gz
Writing /tmp/easy_install-xnAHIU/setuptools_cython-0.2.1/setup.cfg
Running setuptools_cython-0.2.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-xnAHIU/setuptools_cython-0.2.1/egg-dist-tmp-zk1125
zip_safe flag not set; analyzing archive contents...
Copying setuptools_cython-0.2.1-py2.7.egg to /private/tmp/pip-build-my91LX/xmlsec/.eggs
Installed /private/tmp/pip-build-my91LX/xmlsec/.eggs/setuptools_cython-0.2.1-py2.7.egg
Searching for Cython
Reading https://pypi.python.org/simple/Cython/
Traceback (most recent call last):
File "<string>", line 20, in <module>
File "/private/tmp/pip-build-my91LX/xmlsec/setup.py", line 121, in <module>
make_extension('xmlsec.template'),
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "/usr/local/lib/python2.7/site-packages/setuptools/dist.py", line 268, in __init__
self.fetch_build_eggs(attrs['setup_requires'])
File "/usr/local/lib/python2.7/site-packages/setuptools/dist.py", line 313, in fetch_build_eggs
replace_conflicting=True,
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 836, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1081, in best_match
return self.obtain(req, installer)
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1093, in obtain
return installer(requirement)
File "/usr/local/lib/python2.7/site-packages/setuptools/dist.py", line 380, in fetch_build_egg
return cmd.easy_install(req)
File "/usr/local/lib/python2.7/site-packages/setuptools/command/easy_install.py", line 626, in easy_install
not self.always_copy, self.local_index
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 590, in fetch_distribution
self.find_packages(requirement)
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 427, in find_packages
self.scan_url(self.index_url + requirement.unsafe_name+'/')
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 761, in scan_url
self.process_url(url, True)
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 304, in process_url
f = self.open_url(url, "Download error on %s: %%s -- Some packages may not be found!" % url)
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 700, in open_url
return open_with_auth(url, self.opener)
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 894, in _socket_timeout
return func(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/setuptools/package_index.py", line 1007, in open_with_auth
fp = opener(request)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 154, in urlopen
return opener.open(url, data, timeout)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 437, in open
response = meth(req, response)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 550, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 469, in error
result = self._call_chain(*args)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
result = func(*args)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 656, in http_error_302
return self.parent.open(new, timeout=req.timeout)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 437, in open
response = meth(req, response)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 550, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 469, in error
result = self._call_chain(*args)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
result = func(*args)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 656, in http_error_302
return self.parent.open(new, timeout=req.timeout)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 431, in open
response = self._open(req, data)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 449, in _open
'_open', req)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
result = func(*args)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1240, in https_open
context=self._context)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1200, in do_open
r = h.getresponse(buffering=True)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1132, in getresponse
response.begin()
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 453, in begin
version, status, reason = self._read_status()
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 409, in _read_status
line = self.fp.readline(_MAXLINE + 1)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 480, in readline
data = self._sock.recv(self._rbufsize)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 734, in recv
return self.read(buflen)
File "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ssl.py", line 621, in read
v = self._sslobj.read(len or 1024)
ssl.SSLError: ('The read operation timed out',)
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/tmp/pip-build-my91LX/xmlsec
and when I download the source and do it manually I get:
Processing /Users/myuser/python-xmlsec
Requirement already satisfied (use --upgrade to upgrade): lxml>=3.0 in /usr/local/lib/python2.7/site-packages (from xmlsec==0.1.2)
Installing collected packages: xmlsec
Running setup.py install for xmlsec
Complete output from command /usr/local/opt/python/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-ad8Fqh-build/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-X7VjyO-record/install-record.txt --single-version-externally-managed --compile:
running install
running build
running build_py
creating build
creating build/lib.macosx-10.11-x86_64-2.7
creating build/lib.macosx-10.11-x86_64-2.7/xmlsec
copying src/xmlsec/__init__.py -> build/lib.macosx-10.11-x86_64-2.7/xmlsec
copying src/xmlsec/meta.py -> build/lib.macosx-10.11-x86_64-2.7/xmlsec
running build_ext
cythoning src/xmlsec/constants.pyx to src/xmlsec/constants.c
building 'xmlsec.constants' extension
creating build/temp.macosx-10.11-x86_64-2.7
creating build/temp.macosx-10.11-x86_64-2.7/src
creating build/temp.macosx-10.11-x86_64-2.7/src/xmlsec
clang -fno-strict-aliasing -fno-common -dynamic -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/usr/local/lib/python2.7/site-packages/lxml -I/usr/local/lib/python2.7/site-packages/lxml/includes -Isrc -I/usr/local/Cellar/libxml2/2.9.2/include/libxml2 -I/usr/local/include -I/usr/local/opt/openssl/include -I/usr/local/opt/sqlite/include -I/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c src/xmlsec/constants.c -o build/temp.macosx-10.11-x86_64-2.7/src/xmlsec/constants.o
In file included from src/xmlsec/constants.c:256:
src/xmlsec.h:1:10: fatal error: 'xmlsec/crypto.h' file not found
#include <xmlsec/crypto.h>
^
1 error generated.
error: command 'clang' failed with exit status 1
----------------------------------------
Command "/usr/local/opt/python/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-ad8Fqh-build/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-X7VjyO-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-ad8Fqh-build
Is there something i'm missing?

Answer 1

This finally worked:
brew install -v libxmlsec1
Obviously this is using homebrew on macOS.

Answer 2

Installing (or reinstalling) limbxmlsec1 didn't work for me on OSX 10.14. Here's what I had to do:
There are some SDK headers that come with xcode. Copy them to the desktop:
cp /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg ~/Desktop
Install the package by double-clicking it, or by running this command:
sudo installer -pkg ~/Desktop/macOS_SDK_headers_for_macOS_10.14.pkg -target /
Try installing again:
pip install xmlsec