Source: rand.go in package crypto/rand

Source File
	rand.go

Belonging Package
	crypto/rand

Package rand implements a cryptographically secure random number generator.

package rand

import "io"

Reader is a global, shared instance of a cryptographically secure random number generator. On Linux and FreeBSD, Reader uses getrandom(2) if available, /dev/urandom otherwise. On OpenBSD, Reader uses getentropy(2). On other Unix-like systems, Reader reads from /dev/urandom. On Windows systems, Reader uses the RtlGenRandom API. On Wasm, Reader uses the Web Crypto API.

var Reader io.Reader

Read is a helper function that calls Reader.Read using io.ReadFull. On return, n == len(b) if and only if err == nil.

func Read(b []byte) (n int, err error) {
	return io.ReadFull(Reader, b)


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