var crypto/rand.Reader

7 uses

	crypto/rand (current package)
		rand.go#L19: var Reader io.Reader
		rand.go#L24: 	return io.ReadFull(Reader, b)
		rand_unix.go#L32: 		Reader = newReader(nil)
		rand_unix.go#L34: 		Reader = &devReader{name: urandomDevice}

	crypto/ed25519
		ed25519.go#L100: 		rand = cryptorand.Reader

	crypto/tls
		common.go#L914: 		return rand.Reader

	mime/multipart
		writer.go#L86: 	_, err := io.ReadFull(rand.Reader, buf[:])