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OpenSSL Base64 En/Decode: Portable and binary safe.
OpenSSL Base64 Encoding: Binary Safe and Portable
Herewith is an example of encoding to and from base64 using OpenSSL's C library. Code presented here is both binary safe, and portable (i.e. it should work on any Posix compliant system e.g. FreeBSD and Linux).
Putting cryptographic primitives together is a lot like putting a jigsaw
puzzle together, where all the pieces are cut exactly the same way, but there
is only one correct solution. Thankfully, there are some projects out there
that are working hard to make sure developers are getting it right.
The following advice comes from years of research from leading security
researchers, developers, and cryptographers. This Gist was [forked from Thomas
Ptacek's Gist][1] to be more readable. Additions have been added from
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