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PREREQUISITES.rst

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Prerequisites

For Linux or Mac platforms, the INSTALL.sh script should take care of everything you need.

If you don't want to run that script on the machine where you want to re-sign apps, this will explain what you need.

First, on the machine where you're going to re-sign apps, ensure openssl is at version 1.0.1 or better, like this:

$ openssl version
OpenSSL 1.0.1 14 Mar 2012

If that looks okay, you can probably install. If not:

Linux

You can probably easily update this with your package manager, such as apt-get upgrade openssl.

Mac OS X

With OS X 10.11 "El Capitan", Apple stopped shipping some programs, libraries, and headers that we'll need. You can use homebrew to install them:

$ brew install openssl libffi

You will also have to put brew's openssl into your path somehow, probably like this:

$ brew list openssl
...
/usr/local/Cellar/openssl/1.0.2e/bin/openssl    <-- you want this
...

$ ln -s /usr/local/Cellar/openssl/1.0.2e/bin/openssl /usr/local/bin/openssl

If you really don't want to alter the default openssl, you can put the path to brew's openssl in an environment variable, $OPENSSL, e.g.

$ export OPENSSL=/usr/local/Cellar/openssl/1.0.2e/bin/openssl

If isign sees that, it will use that for its openssl instead.

Anyway, no matter how you install the binary, to complete the installation of isign you need to add some library paths to your environment. The procedure will look something like this.

$ brew info openssl
...
build variables:

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

$ brew info libffi
...
build variables:

  LDFLAGS:  -L/usr/local/opt/libffi/lib

Then, take the flags from above, and put them into appropriate environment variables:

$ export LDFLAGS="-L/usr/local/opt/openssl/lib -L/usr/local/opt/libffi/lib"
$ export CPPFLAGS="-I/usr/local/opt/openssl/include"

Finally, be aware that the python that ships with Mac OS X doesn't have the package manager pip. You can probably use easy_install instead of pip. Or, you can get a more up-to-date python with brew install python.

Now you're probably ready to install isign. A simple pip install isign should succeed.