Mac OS X系統安裝openssl和Cryptography

~brew install openssl

==> Downloading https://homebrew.bintray.com/bottles/openssl-1.0.2g.el_capitan.bottle.tar.gz
Already downloaded: /Library/Caches/Homebrew/openssl-1.0.2g.el_capitan.bottle.tar.gz
==> Pouring openssl-1.0.2g.el_capitan.bottle.tar.gz
==> Caveats
A CA file has been bootstrapped using certificates from the system
keychain. To add additional certificates, place .pem files in
  /usr/local/etc/openssl/certs

and run
  /usr/local/opt/openssl/bin/c_rehash

This formula is keg-only, which means it was not symlinked into /usr/local.

Apple has deprecated use of OpenSSL in favor of its own TLS and crypto libraries

Generally there are no consequences of this for you. If you build your
own software and it requires this formula, you'll need to add to your
build variables:

    LDFLAGS:  -L/usr/local/opt/openssl/lib
    CPPFLAGS: -I/usr/local/opt/openssl/include

==> Summary
🍺  /usr/local/Cellar/openssl/1.0.2g: 1,678 files, 12.0M

~/usr/local/opt/openssl/bin/c_rehash

~env ARCHFLAGS="-arch x86_64" LDFLAGS="-L/usr/local/opt/openssl/lib" CFLAGS="-I/usr/local/opt/openssl/include" pip install cryptography

~sudo easy_install Cryptography