go-crypto contains the following packages:

• drbg: a cryptographically secure pseudorandom number generator
• encoding/base32: a compact base32 encoder
• secretkey: user-friendly secret keys that can be used with secretbox

It also includes packages that you probably don't need:

• salsa20: a streaming interface (cipher.Stream) for the Salsa20 stream cipher
• poly1305: a streaming interface (hash.Hash) for the Poly1305 one-time authenticator