// license that can be found in the LICENSE file.

package bbig

import (
	"crypto/internal/boring"
	"math/big"
	"unsafe"
)

func Enc(b *big.Int) boring.BigInt {
	if b == nil {
		return nil
	}
	x := b.Bits()
	if len(x) == 0 {
		return boring.BigInt{}
	}
	return unsafe.Slice((*uint)(&x[0]), len(x))
}

func Dec(b boring.BigInt) *big.Int {
	if b == nil {
		return nil
	}
	if len(b) == 0 {

// license that can be found in the LICENSE file.

//go:build !boringcrypto

package rsa

import "crypto/internal/boring"

func boringPublicKey(*PublicKey) (*boring.PublicKeyRSA, error) {
	panic("boringcrypto: not available")
}
func boringPrivateKey(*PrivateKey) (*boring.PrivateKeyRSA, error) {
	panic("boringcrypto: not available")

// state of the hash.
func New() hash.Hash {
	if boring.Enabled {
		return boring.NewSHA256()
	}
	d := new(digest)
	d.Reset()
	return d
}

// New224 returns a new hash.Hash computing the SHA224 checksum.
func New224() hash.Hash {
	if boring.Enabled {
		return boring.NewSHA224()
	}
	d := new(digest)
	d.is224 = true
	d.Reset()
	return d
}

//go:build boringcrypto

package boring_test

import (
	"crypto/boring"
	"runtime"
	"testing"
)

func TestEnabled(t *testing.T) {
	supportedPlatform := runtime.GOOS == "linux" && (runtime.GOARCH == "amd64" || runtime.GOARCH == "arm64")
	if supportedPlatform && !boring.Enabled() {
		t.Error("Enabled returned false on a supported platform")
	} else if !supportedPlatform && boring.Enabled() {

		return nil, err
	}
	k := pub.Size()
	if len(msg) > k-11 {
		return nil, ErrMessageTooLong
	}

	if boring.Enabled && random == boring.RandReader {
		bkey, err := boringPublicKey(pub)
		if err != nil {
			return nil, err
		}
		return boring.EncryptRSAPKCS1(bkey, msg)
	}
	boring.UnreachableExceptTests()

	// EM = 0x00 || 0x02 || PS || 0x00 || M
	em := make([]byte, k)
	em[1] = 2

// license that can be found in the LICENSE file.

//go:build !boringcrypto

package ecdsa

import "crypto/internal/boring"

func boringPublicKey(*PublicKey) (*boring.PublicKeyECDSA, error) {
	panic("boringcrypto: not available")
}
func boringPrivateKey(*PrivateKey) (*boring.PrivateKeyECDSA, error) {
	panic("boringcrypto: not available")

	NET, log
	< net/mail;

	NONE < crypto/internal/boring/sig, crypto/internal/boring/syso;
	sync/atomic < crypto/internal/boring/bcache, crypto/internal/boring/fipstls;
	crypto/internal/boring/sig, crypto/internal/boring/fipstls < crypto/tls/fipsonly;

	# CRYPTO is core crypto algorithms - no cgo, fmt, net.
	crypto/internal/boring/sig,
	crypto/internal/boring/syso,
	golang.org/x/sys/cpu,
	hash, embed
	< crypto

	// well-specified number of random bytes is included in the signature, in a
	// well-specified way.

	if boring.Enabled && rand == boring.RandReader {
		bkey, err := boringPrivateKey(priv)
		if err != nil {
			return nil, err
		}
		return boring.SignRSAPSS(bkey, hash, digest, opts.saltLength())
	}
	boring.UnreachableExceptTests()

	if opts != nil && opts.Hash != 0 {
		hash = opts.Hash
	}

func Sum512(data []byte) [Size]byte {
	if boring.Enabled {
		return boring.SHA512(data)
	}
	d := digest{function: crypto.SHA512}
	d.Reset()
	d.Write(data)
	return d.checkSum()
}

// Sum384 returns the SHA384 checksum of the data.
func Sum384(data []byte) [Size384]byte {
	if boring.Enabled {
		return boring.SHA384(data)
	}
	d := digest{function: crypto.SHA384}
	d.Reset()

// with [crypto/x509.MarshalPKIXPublicKey]. For NIST curves, they then need to
// be converted with [crypto/ecdsa.PublicKey.ECDH] after parsing.
type PublicKey struct {
	curve     Curve
	publicKey []byte
	boring    *boring.PublicKeyECDH
}

// Bytes returns a copy of the encoding of the public key.
func (k *PublicKey) Bytes() []byte {
	// Copy the public key to a fixed size buffer that can get allocated on the