Package alias implements memory aliasing tests.

Package bisect can be used by compilers and other programs to serve as a target for the bisect debugging tool.

Package boring provides access to BoringCrypto implementation functions.

Package cfg holds configuration shared by the Go command and internal/testenv.

Package cpu implements processor feature detection used by the Go standard library.

Package edwards25519 implements group logic for the twisted Edwards curve -x^2 + y^2 = 1 + -(121665/121666)*x^2*y^2 This is better known as the Edwards curve equivalent to Curve25519, and is the curve used by the Ed25519 signature scheme.

Package race contains helper functions for manually instrumenting code for the race detector.

Package randutil contains internal randomness utilities for various crypto packages.

Package txtar implements a trivial text-based file archive format.