"go/build"
	"internal/testenv"
	"log"
	"os"
	"os/exec"
	"strings"
	"testing"
)

// TestPureGoTag checks that when built with the purego build tag, crypto
// packages don't require any assembly. This is used by alternative compilers
// such as TinyGo. See also the "crypto/...:purego" test in cmd/dist, which
// ensures the packages build correctly.
func TestPureGoTag(t *testing.T) {

// Copyright 2023 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.

//go:build purego

package maphash

import (
	"crypto/rand"
	"internal/byteorder"
	"math/bits"
)

func rthash(buf []byte, seed uint64) uint64 {
	if len(buf) == 0 {
		return seed
	}
	return wyhash(buf, seed, uint64(len(buf)))
}

// Copyright 2016 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.

//go:build !purego

package sha256

import "internal/cpu"

// Copyright 2013 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.

//go:build (ppc64le || ppc64 || riscv64 || s390x) && !purego

package sha512

//go:noescape

// Copyright 2014 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.

//go:build (!amd64 && !386 && !arm && !s390x && !arm64) || purego

package sha1

func block(dig *digest, p []byte) {
	blockGeneric(dig, p)

// Copyright 2016 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.

//go:build !amd64 || !gc || purego

package chacha20poly1305

func (c *chacha20poly1305) seal(dst, nonce, plaintext, additionalData []byte) []byte {
	return c.sealGeneric(dst, nonce, plaintext, additionalData)
}

//   - github.com/ebitengine/purego
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname _cgo_setenv
var _cgo_setenv unsafe.Pointer // pointer to C function

// _cgo_unsetenv should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/ebitengine/purego
//

// run -tags=purego -gcflags=all=-d=checkptr

// Copyright 2023 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 main

import "crypto/subtle"

func main() {
	dst := make([]byte, 5)
	src := make([]byte, 5)
	for _, n := range []int{1024, 2048} { // just to make the size non-constant
		b := make([]byte, n)
		subtle.XORBytes(dst, src, b[n-5:])

// Copyright 2020 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.

//go:build !purego

package subtle

//go:noescape

// Copyright 2016 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.

//go:build (!amd64 && !arm64 && !ppc64 && !ppc64le && !riscv64 && !s390x) || purego

package sha512

func block(dig *digest, p []byte) {
	blockGeneric(dig, p)