// Copyright 2018 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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// +build js,wasm
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package rand
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import "syscall/js"
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func init() {
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Reader = &reader{}
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}
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var jsCrypto = js.Global().Get("crypto")
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// reader implements a pseudorandom generator
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// using JavaScript crypto.getRandomValues method.
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// See https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues.
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type reader struct{}
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func (r *reader) Read(b []byte) (int, error) {
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a := js.TypedArrayOf(b)
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jsCrypto.Call("getRandomValues", a)
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a.Release()
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return len(b), nil
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}
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