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Source file src/crypto/rand/rand.go

Documentation: crypto/rand

  // Copyright 2010 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  // Package rand implements a cryptographically secure
  // pseudorandom number generator.
  package rand
  import "io"
  // Reader is a global, shared instance of a cryptographically
  // strong pseudo-random generator.
  // On Linux, 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 CryptGenRandom 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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