//go:build boringcrypto && linux && (amd64 || arm64) && !android && !msan

package boring

// #include "goboringcrypto.h"
import "C"
import "unsafe"

type randReader int

func (randReader) Read(b []byte) (int, error) {
	// Note: RAND_bytes should never fail; the return value exists only for historical reasons.
	// We check it even so.

// when BoringCrypto is in use. It is a no-op without BoringCrypto.
func UnreachableExceptTests() {}

type randReader int

func (randReader) Read(b []byte) (int, error) { panic("boringcrypto: not available") }

const RandReader = randReader(0)

func NewSHA1() hash.Hash   { panic("boringcrypto: not available") }
func NewSHA224() hash.Hash { panic("boringcrypto: not available") }

	"crypto/internal/boring"
	"errors"
	"io"
	"os"
	"sync"
	"sync/atomic"
	"syscall"
	"time"
)

const urandomDevice = "/dev/urandom"

func init() {
	if boring.Enabled {
		Reader = boring.RandReader
		return
	}
	Reader = &reader{}
}

// A reader satisfies reads by reading from urandomDevice
type reader struct {
	f    io.Reader
	mu   sync.Mutex

	return c.name
}

var errInvalidPrivateKey = errors.New("crypto/ecdh: invalid private key")

func (c *nistCurve[Point]) GenerateKey(rand io.Reader) (*PrivateKey, error) {
	if boring.Enabled && rand == boring.RandReader {
		key, bytes, err := boring.GenerateKeyECDH(c.name)
		if err != nil {
			return nil, err
		}
		return newBoringPrivateKey(c, key, bytes)
	}

	key := make([]byte, len(c.scalarOrder))