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27 lines
916 B
Go
27 lines
916 B
Go
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package rand implements a cryptographically secure
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// random number generator.
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package rand
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import "io"
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// Reader is a global, shared instance of a cryptographically
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// secure random number generator.
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//
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// On Linux, FreeBSD, Dragonfly and Solaris, Reader uses getrandom(2) if
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// available, /dev/urandom otherwise.
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// On OpenBSD and macOS, Reader uses getentropy(2).
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// On other Unix-like systems, Reader reads from /dev/urandom.
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// On Windows systems, Reader uses the RtlGenRandom API.
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// On Wasm, Reader uses the Web Crypto API.
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var Reader io.Reader
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// Read is a helper function that calls Reader.Read using io.ReadFull.
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// On return, n == len(b) if and only if err == nil.
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func Read(b []byte) (n int, err error) {
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return io.ReadFull(Reader, b)
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}
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