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I am using Win8.1 64 bit machine with Python 2.7 installed. I have installed swigwin 3.0.5. When I do "pip install M2Crypto" I got the following errors:

SWIG\_m2crypto.i(30) : Error: Unable to find 'openssl\opensslv.h'

SWIG\_m2crypto.i(33) : Error: Unable to find 'openssl\safestack.h'

SWIG\_evp.i(12) : Error: Unable to find 'openssl\opensslconf.h'

SWIG\_ec.i(7) : Error: Unable to find 'openssl\o,pensslconf.h'

In some links I found the suggestion is to install openssl-dev. But I could not find the equivalent package for windows (pip install openssl-dev does not work and I have done pip install pyOpenSSL which did not help me).

Thanks in advance.

Laurence
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Ram
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2 Answers2

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Installing M2Crypto on Windows is a pain. Fortunately, some people have gone to the effort of creating Windows installers for M2Crypto:

You can also use a slightly older version of the package directly from the maker's of M2Crypto as they actually provided Windows installable versions of it for a while:

This was also a useful link:

Mike Driscoll
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  • Thanks a lot Mike, second link worked for me. I've tried a lot to over come from this. Great help, thank you so much. – Ram May 14 '15 at 18:38
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    pip install --egg M2CryptoWin64 *no such option: --egg* – alecxs Dec 19 '20 at 00:04
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I solved the problem (in a MiniConda installation on Windows) by:

  1. conda install openssl
  2. Copy <MiniConda directory>\envs\<environment>\Library\include\openssl to <MiniConda directory>\envs\<environment>\include\openssl (or mklink it)

It would probably work in other Python environments too.

But, I ran into further problems (which I don't know how to solve):

    building 'M2Crypto.__m2crypto' extension
    swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
    C:\Program Files\MiniConda3\envs\python2\Library\bin\swig.exe -python "-IC:\Program Files\MiniConda3\envs\python2\include" "-IC:\Program Files\MiniConda3\envs\python2\PC" -Ic:\pkg\include -include
all -modern -builtin -outdir build\lib.win-amd64-2.7\M2Crypto -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
    SWIG\_bio.i(64) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_rand.i(23) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_evp.i(180) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_dh.i(36) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_rsa.i(43) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_dsa.i(31) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_ssl.i(241) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_ssl.i(242) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_x509.i(332) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_pkcs7.i(44) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_pkcs7.i(44) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_util.i(11) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_ec.i(111) : Warning 454: Setting a pointer/reference variable may leak memory.
    SWIG\_engine.i(168) : Warning 454: Setting a pointer/reference variable may leak memory.
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "c:\users\pal\appdata\local\temp\pip-build-reeqlh\M2Crypto\setup.py", line 280, in <module>
        'clean': Clean
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\core.py", line 151, in setup
        dist.run_commands()
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\dist.py", line 953, in run_commands
        self.run_command(cmd)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\dist.py", line 972, in run_command
        cmd_obj.run()
      File "C:\Program Files\MiniConda3\envs\python2\lib\site-packages\setuptools\command\install.py", line 53, in run
        return _install.run(self)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\command\install.py", line 563, in run
        self.run_command('build')
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\cmd.py", line 326, in run_command
        self.distribution.run_command(command)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\dist.py", line 972, in run_command
        cmd_obj.run()
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\command\build.py", line 127, in run
        self.run_command(cmd_name)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\cmd.py", line 326, in run_command
        self.distribution.run_command(command)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\dist.py", line 972, in run_command
        cmd_obj.run()
      File "c:\users\pal\appdata\local\temp\pip-build-reeqlh\M2Crypto\setup.py", line 148, in run
        build_ext.build_ext.run(self)
      File "C:\Program Files\MiniConda3\envs\python2\lib\site-packages\setuptools\command\build_ext.py", line 46, in run
        _build_ext.run(self)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\command\build_ext.py", line 339, in run
        self.build_extensions()
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\command\build_ext.py", line 448, in build_extensions
        self.build_extension(ext)
      File "C:\Program Files\MiniConda3\envs\python2\lib\site-packages\setuptools\command\build_ext.py", line 182, in build_extension
        _build_ext.build_extension(self,ext)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\command\build_ext.py", line 498, in build_extension
        depends=ext.depends)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\msvc9compiler.py", line 473, in compile
        self.initialize()
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\msvc9compiler.py", line 383, in initialize
        vc_env = query_vcvarsall(VERSION, plat_spec)
      File "C:\Program Files\MiniConda3\envs\python2\lib\distutils\msvc9compiler.py", line 299, in query_vcvarsall
        raise ValueError(str(list(result.keys())))
    ValueError: [u'path']

    ----------------------------------------
Command ""C:\Program Files\MiniConda3\envs\python2\python.exe" -u -c "import setuptools, tokenize;__file__='c:\\users\\pal\\appdata\\local\\temp\\pip-build-reeqlh\\M2Crypto\\setup.py';exec(compile(get
attr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record c:\users\pal\appdata\local\temp\pip-opk8he-record\install-record.txt --single-version-external
ly-managed --compile" failed with error code 1 in c:\users\pal\appdata\local\temp\pip-build-reeqlh\M2Crypto\
Patrik Bodin
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