This is a simple library that allows I/O streams to be easily encrypted and decrypted using Go's standard AES/GCM implementation. Unlike the original libraries, which operate on slices of bytes, iocrypt reads, encrypts, and saves data in chunks, allowing the use of large data sets.
I am NOT a cryptographer and I wrote this code in one afternoon. This library makes use of the the standard libraries to encrypt/decrypt a file in "chunks", so it should be safe. Use at your own risk. Feel free to review the code and report any problems.