//go:build unix

// Socket control messages

package syscall

import (
	"unsafe"
)

// CmsgLen returns the value to store in the Len field of the [Cmsghdr]
// structure, taking into account any necessary alignment.
func CmsgLen(datalen int) int {
	return cmsgAlignOf(SizeofCmsghdr) + datalen
}

// CmsgSpace returns the number of bytes an ancillary element with

// authentication.
func UnixCredentials(ucred *Ucred) []byte {
	b := make([]byte, CmsgSpace(SizeofUcred))
	h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
	h.Level = SOL_SOCKET
	h.Type = SCM_CREDENTIALS
	h.SetLen(CmsgLen(SizeofUcred))
	*(*Ucred)(h.data(0)) = *ucred
	return b
}

// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the

	}

	// 3.  If emLen < hLen + sLen + 2, output "encoding error" and stop.

	if emLen < hLen+sLen+2 {
		return nil, ErrMessageTooLong
	}

	em := make([]byte, emLen)
	psLen := emLen - sLen - hLen - 2
	db := em[:psLen+1+sLen]
	h := em[psLen+1+sLen : emLen-1]

	// 4.  Generate a random octet string salt of length sLen; if sLen = 0,
	//     then salt is the empty string.
	//
	// 5.  Let

	size := C._goboringcrypto_ECDSA_size(priv.key)
	sig := make([]byte, size)
	var sigLen C.uint
	if C._goboringcrypto_ECDSA_sign(0, base(hash), C.size_t(len(hash)), base(sig), &sigLen, priv.key) == 0 {
		return nil, fail("ECDSA_sign")
	}
	runtime.KeepAlive(priv)
	return sig[:sigLen], nil
}

func VerifyECDSA(pub *PublicKeyECDSA, hash []byte, sig []byte) bool {

	var ptr unsafe.Pointer
	var salen _Socklen
	if to != nil {
		ptr, salen, err = to.sockaddr()
		if err != nil {
			return 0, err
		}
	}
	return sendmsgN(fd, p, oob, ptr, salen, flags)
}

func sendmsgNInet4(fd int, p, oob []byte, to *SockaddrInet4, flags int) (n int, err error) {
	ptr, salen, err := to.sockaddr()
	if err != nil {
		return 0, err
	}

//go:build aix || darwin || freebsd || linux || netbsd || openbsd || solaris || zos

package unix

import (
	"runtime"
)

// Round the length of a raw sockaddr up to align it properly.
func cmsgAlignOf(salen int) int {
	salign := SizeofPtr

	// dragonfly needs to check ABI version at runtime, see cmsgAlignOf in
	// sockcmsg_dragonfly.go
	switch runtime.GOOS {
	case "aix":
		// There is no alignment on AIX.
		salign = 1

	// makeFuncImpl contains a stack map for use by the runtime
	_, _, abid := funcLayout(ftyp, nil)

	impl := &makeFuncImpl{
		makeFuncCtxt: makeFuncCtxt{
			fn:      code,
			stack:   abid.stackPtrs,
			argLen:  abid.stackCallArgsSize,
			regPtrs: abid.inRegPtrs,
		},
		ftyp: ftyp,
		fn:   fn,
	}

	return Value{t, unsafe.Pointer(impl), flag(Func)}
}

		t.Skipf("skipping test: GOARCH=%s", runtime.GOARCH)
	}

	for arglen := 0; arglen <= runtime.MaxArgs; arglen++ {
		arglen := arglen
		t.Run(fmt.Sprintf("arg-%d", arglen), func(t *testing.T) {
			t.Parallel()
			args := make([]string, arglen)
			rets := make([]string, arglen+1)
			params := make([]uintptr, arglen)
			for i := range args {
				args[i] = fmt.Sprintf("int a%d", i)

	var iov [1]Iovec
	if len(p) > 0 {
		iov[0].Base = &p[0]
		iov[0].SetLen(len(p))
	}
	var ptr unsafe.Pointer
	var salen _Socklen
	if to != nil {
		ptr, salen, err = to.sockaddr()
		if err != nil {
			return 0, err
		}
	}
	return sendmsgN(fd, iov[:], oob, ptr, salen, flags)
}

// SendmsgBuffers sends a message on a socket to an address using the sendmsg

	MOVBU	(X10), X15
	ADD	$1, X10
	BNE	X12, X15, loop
	ADD	$1, X14
	JMP	loop

done:
	MOV	X14, X10
	RET

TEXT ·CountString<ABIInternal>(SB),NOSPLIT,$0-32
	// X10 = s_base
	// X11 = s_len
	// X12 = byte to count
	AND	$0xff, X12
	MOV	ZERO, X14	// count
	ADD	X10, X11	// end

	PCALIGN	$16
loop:
	BEQ	X10, X11, done
	MOVBU	(X10), X15
	ADD	$1, X10
	BNE	X12, X15, loop
	ADD	$1, X14