This is snippet to encrypt or decrypt string by pyCrypto.

pycrypto-aes.py

#!/usr/bin/env python
# coding: utf-8
#
# I tested on Python 3.4.3/Windows 8.1 and Window 10.
# Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32

# https://github.com/dlitz/pycrypto
# Get Windows binary from http://www.voidspace.org.uk/python/pycrypto-2.6.1/
from Crypto.Cipher import AES
import traceback

def main():
    print('Crypto.Cipher.AES: {0}'.format(AES.__file__))

    plaintext = input("Please input plain text:\n> ")

    try:
        # AES-CBC encryption
        aesObj = AES.new('This is a key123', AES.MODE_CBC, 'This is an IV456')
        ciphertext = aesObj.encrypt(plaintext)
        print('Encrypted by AES-CBC: {0}'.format(ciphertext))

        # AES-CBC decryption
        aesObj = AES.new('This is a key123', AES.MODE_CBC, 'This is an IV456')
        print('Decrypted by AES-CBC: {0}'.format(aesObj.decrypt(ciphertext)))
    except ValueError as e:
        # ValueError will raise if length of plaintext is not multiple of 16 bytes.
        #
        # p.181 5.5 例外処理, ”Python文法詳解", O'REILLY
        # https://docs.python.org/3/library/traceback.html#traceback.print_exc
        print('[!] ValueError raised: {0}'.format(e))
        traceback.print_exc()

if __name__ == '__main__':
    main()

pyCrypto_setup.py_build.txt

## Git Bash on Windows 10

$ git clone git@github.com:dlitz/pycrypto.git
Cloning into 'pycrypto'...
Enter passphrase for key '(snip)':
remote: Counting objects: 6554, done.
remote: Total 6554 (delta 0), reused 0 (delta 0), pack-reused 6554
Receiving objects: 100% (6554/6554), 3.78 MiB | 1.37 MiB/s, done.
Resolving deltas: 100% (3401/3401), done.
Checking connectivity... done.

## Command Prompt on Windows 10

$> C:\Python34\python.exe setup.py build bdist_wininst
running build
running build_py
creating build
creating build\lib.win32-3.4
creating build\lib.win32-3.4\Crypto
copying lib\Crypto\pct_warnings.py -> build\lib.win32-3.4\Crypto
copying lib\Crypto\__init__.py -> build\lib.win32-3.4\Crypto
creating build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\CMAC.py -> build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\HMAC.py -> build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\MD5.py -> build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\RIPEMD.py -> build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\SHA.py -> build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\SHA1.py -> build\lib.win32-3.4\Crypto\Hash
copying lib\Crypto\Hash\__init__.py -> build\lib.win32-3.4\Crypto\Hash
creating build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\AES.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\ARC2.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\ARC4.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\blockalgo.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\Blowfish.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\CAST.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\DES.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\DES3.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\PKCS1_OAEP.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\PKCS1_v1_5.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\XOR.py -> build\lib.win32-3.4\Crypto\Cipher
copying lib\Crypto\Cipher\__init__.py -> build\lib.win32-3.4\Crypto\Cipher
creating build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\asn1.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\Counter.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\number.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\Padding.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\py3compat.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\randpool.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\RFC1751.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\winrandom.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\_number_new.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\_time.py -> build\lib.win32-3.4\Crypto\Util
copying lib\Crypto\Util\__init__.py -> build\lib.win32-3.4\Crypto\Util
creating build\lib.win32-3.4\Crypto\Random
copying lib\Crypto\Random\random.py -> build\lib.win32-3.4\Crypto\Random
copying lib\Crypto\Random\_UserFriendlyRNG.py -> build\lib.win32-3.4\Crypto\Random
copying lib\Crypto\Random\__init__.py -> build\lib.win32-3.4\Crypto\Random
creating build\lib.win32-3.4\Crypto\Random\Fortuna
copying lib\Crypto\Random\Fortuna\FortunaAccumulator.py -> build\lib.win32-3.4\Crypto\Random\Fortuna
copying lib\Crypto\Random\Fortuna\FortunaGenerator.py -> build\lib.win32-3.4\Crypto\Random\Fortuna
copying lib\Crypto\Random\Fortuna\SHAd256.py -> build\lib.win32-3.4\Crypto\Random\Fortuna
copying lib\Crypto\Random\Fortuna\__init__.py -> build\lib.win32-3.4\Crypto\Random\Fortuna
creating build\lib.win32-3.4\Crypto\Random\OSRNG
copying lib\Crypto\Random\OSRNG\fallback.py -> build\lib.win32-3.4\Crypto\Random\OSRNG
copying lib\Crypto\Random\OSRNG\nt.py -> build\lib.win32-3.4\Crypto\Random\OSRNG
copying lib\Crypto\Random\OSRNG\posix.py -> build\lib.win32-3.4\Crypto\Random\OSRNG
copying lib\Crypto\Random\OSRNG\rng_base.py -> build\lib.win32-3.4\Crypto\Random\OSRNG
copying lib\Crypto\Random\OSRNG\__init__.py -> build\lib.win32-3.4\Crypto\Random\OSRNG
creating build\lib.win32-3.4\Crypto\SelfTest
copying lib\Crypto\SelfTest\st_common.py -> build\lib.win32-3.4\Crypto\SelfTest
copying lib\Crypto\SelfTest\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest
creating build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\common.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_AES.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_ARC2.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_ARC4.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_Blowfish.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_CAST.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_DES.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_DES3.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_pkcs1_15.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_pkcs1_oaep.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\test_XOR.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
copying lib\Crypto\SelfTest\Cipher\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Cipher
creating build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\common.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_CMAC.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_HMAC.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_MD2.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_MD4.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_MD5.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_RIPEMD160.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_SHA1.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_SHA224.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_SHA256.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_SHA384.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\test_SHA512.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
copying lib\Crypto\SelfTest\Hash\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Hash
creating build\lib.win32-3.4\Crypto\SelfTest\Protocol
copying lib\Crypto\SelfTest\Protocol\test_AllOrNothing.py -> build\lib.win32-3.4\Crypto\SelfTest\Protocol
copying lib\Crypto\SelfTest\Protocol\test_chaffing.py -> build\lib.win32-3.4\Crypto\SelfTest\Protocol
copying lib\Crypto\SelfTest\Protocol\test_KDF.py -> build\lib.win32-3.4\Crypto\SelfTest\Protocol
copying lib\Crypto\SelfTest\Protocol\test_rfc1751.py -> build\lib.win32-3.4\Crypto\SelfTest\Protocol
copying lib\Crypto\SelfTest\Protocol\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Protocol
creating build\lib.win32-3.4\Crypto\SelfTest\PublicKey
copying lib\Crypto\SelfTest\PublicKey\test_DSA.py -> build\lib.win32-3.4\Crypto\SelfTest\PublicKey
copying lib\Crypto\SelfTest\PublicKey\test_ElGamal.py -> build\lib.win32-3.4\Crypto\SelfTest\PublicKey
copying lib\Crypto\SelfTest\PublicKey\test_import_DSA.py -> build\lib.win32-3.4\Crypto\SelfTest\PublicKey
copying lib\Crypto\SelfTest\PublicKey\test_import_RSA.py -> build\lib.win32-3.4\Crypto\SelfTest\PublicKey
copying lib\Crypto\SelfTest\PublicKey\test_RSA.py -> build\lib.win32-3.4\Crypto\SelfTest\PublicKey
copying lib\Crypto\SelfTest\PublicKey\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\PublicKey
creating build\lib.win32-3.4\Crypto\SelfTest\Random
copying lib\Crypto\SelfTest\Random\test_random.py -> build\lib.win32-3.4\Crypto\SelfTest\Random
copying lib\Crypto\SelfTest\Random\test_rpoolcompat.py -> build\lib.win32-3.4\Crypto\SelfTest\Random
copying lib\Crypto\SelfTest\Random\test__UserFriendlyRNG.py -> build\lib.win32-3.4\Crypto\SelfTest\Random
copying lib\Crypto\SelfTest\Random\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Random
creating build\lib.win32-3.4\Crypto\SelfTest\Random\Fortuna
copying lib\Crypto\SelfTest\Random\Fortuna\test_FortunaAccumulator.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\Fortuna
copying lib\Crypto\SelfTest\Random\Fortuna\test_FortunaGenerator.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\Fortuna
copying lib\Crypto\SelfTest\Random\Fortuna\test_SHAd256.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\Fortuna
copying lib\Crypto\SelfTest\Random\Fortuna\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\Fortuna
creating build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
copying lib\Crypto\SelfTest\Random\OSRNG\test_fallback.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
copying lib\Crypto\SelfTest\Random\OSRNG\test_generic.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
copying lib\Crypto\SelfTest\Random\OSRNG\test_nt.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
copying lib\Crypto\SelfTest\Random\OSRNG\test_posix.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
copying lib\Crypto\SelfTest\Random\OSRNG\test_winrandom.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
copying lib\Crypto\SelfTest\Random\OSRNG\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Random\OSRNG
creating build\lib.win32-3.4\Crypto\SelfTest\Util
copying lib\Crypto\SelfTest\Util\test_asn1.py -> build\lib.win32-3.4\Crypto\SelfTest\Util
copying lib\Crypto\SelfTest\Util\test_Counter.py -> build\lib.win32-3.4\Crypto\SelfTest\Util
copying lib\Crypto\SelfTest\Util\test_number.py -> build\lib.win32-3.4\Crypto\SelfTest\Util
copying lib\Crypto\SelfTest\Util\test_Padding.py -> build\lib.win32-3.4\Crypto\SelfTest\Util
copying lib\Crypto\SelfTest\Util\test_winrandom.py -> build\lib.win32-3.4\Crypto\SelfTest\Util
copying lib\Crypto\SelfTest\Util\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Util
creating build\lib.win32-3.4\Crypto\SelfTest\Signature
copying lib\Crypto\SelfTest\Signature\test_pkcs1_15.py -> build\lib.win32-3.4\Crypto\SelfTest\Signature
copying lib\Crypto\SelfTest\Signature\test_pkcs1_pss.py -> build\lib.win32-3.4\Crypto\SelfTest\Signature
copying lib\Crypto\SelfTest\Signature\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\Signature
creating build\lib.win32-3.4\Crypto\SelfTest\IO
copying lib\Crypto\SelfTest\IO\test_PKCS8.py -> build\lib.win32-3.4\Crypto\SelfTest\IO
copying lib\Crypto\SelfTest\IO\__init__.py -> build\lib.win32-3.4\Crypto\SelfTest\IO
creating build\lib.win32-3.4\Crypto\Protocol
copying lib\Crypto\Protocol\AllOrNothing.py -> build\lib.win32-3.4\Crypto\Protocol
copying lib\Crypto\Protocol\Chaffing.py -> build\lib.win32-3.4\Crypto\Protocol
copying lib\Crypto\Protocol\KDF.py -> build\lib.win32-3.4\Crypto\Protocol
copying lib\Crypto\Protocol\__init__.py -> build\lib.win32-3.4\Crypto\Protocol
creating build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\DSA.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\ElGamal.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\pubkey.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\RSA.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\_DSA.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\_RSA.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\_slowmath.py -> build\lib.win32-3.4\Crypto\PublicKey
copying lib\Crypto\PublicKey\__init__.py -> build\lib.win32-3.4\Crypto\PublicKey
creating build\lib.win32-3.4\Crypto\Signature
copying lib\Crypto\Signature\PKCS1_PSS.py -> build\lib.win32-3.4\Crypto\Signature
copying lib\Crypto\Signature\PKCS1_v1_5.py -> build\lib.win32-3.4\Crypto\Signature
copying lib\Crypto\Signature\__init__.py -> build\lib.win32-3.4\Crypto\Signature
creating build\lib.win32-3.4\Crypto\IO
copying lib\Crypto\IO\PEM.py -> build\lib.win32-3.4\Crypto\IO
copying lib\Crypto\IO\PKCS8.py -> build\lib.win32-3.4\Crypto\IO
copying lib\Crypto\IO\_PBES.py -> build\lib.win32-3.4\Crypto\IO
copying lib\Crypto\IO\__init__.py -> build\lib.win32-3.4\Crypto\IO
Skipping implicit fixer: buffer
Skipping implicit fixer: idioms
Skipping implicit fixer: set_literal
Skipping implicit fixer: ws_comma
running build_ext
warning: GMP or MPIR library not found; Not building Crypto.PublicKey._fastmath.
building 'Crypto.Random.OSRNG.winrandom' extension
error: Unable to find vcvarsall.bat

---
I found Crypto.Random.OSRNG.winrandom after installing https://github.com/axper/python3-pycrypto-windows-installer. And, the file, winrandom.pyd, is same as Windows DLL. I will need to install Visual C++ Compiler 10; according to references, Windows SDK 7.1 contains the compiler. Visual Studio 2010 Express contains the compiler too, but it is difficult to find the installer now.

## References

- "Is a *.pyd file the same as a DLL?", Python on Windows FAQ
  - https://docs.python.org/3/faq/windows.html#is-a-pyd-file-the-same-as-a-dll
- Windows での Python 2.7/3.4 の拡張モジュールビルド環境, Qiita (in Japanese)
  - http://qiita.com/methane/items/2210712763b91e75fdf0
- オレはこの OSS を Windows で使いたいだけなんじゃ＠python (in Japanese)
  - http://hhsprings.pinoko.jp/site-hhs/2015/05/%E3%82%AA%E3%83%AC%E3%81%AF%E3%81%93%E3%81%AE-oss-%E3%82%92-windows-%E3%81%A7%E4%BD%BF%E3%81%84%E3%81%9F%E3%81%84%E3%81%A0%E3%81%91%E3%81%AA%E3%82%93%E3%81%98%E3%82%83%EF%BC%A0python/

result_pycrypto-aes.py.txt

$> C:\Python34\python.exe pycrypto-aes.py
Crypto.Cipher.AES: C:\Python34\lib\site-packages\Crypto\Cipher\AES.py
Please input plain text:
> 1234567890123456
Encrypted by AES-CBC: b'\xd5\x84~bj\xdf\xe7\xf9`L\x7f\xcf\xdb\xe2\xe17'
Decrypted by AES-CBC: b'1234567890123456'

$> C:\Python34\python.exe pycrypto-aes.py
Crypto.Cipher.AES: C:\Python34\lib\site-packages\Crypto\Cipher\AES.py
Please input plain text:
> 12345
[!] ValueError raised: Input strings must be a multiple of 16 in length
Traceback (most recent call last):
  File "pycrypto-aes.py", line 20, in main
    ciphertext = aesObj.encrypt(plaintext)
  File "C:\Python34\lib\site-packages\Crypto\Cipher\blockalgo.py", line 244, in
encrypt
    return self._cipher.encrypt(plaintext)
ValueError: Input strings must be a multiple of 16 in length