arc4random_darwin.mx raw

   1  // Copyright 2024 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  package unix
   6  
   7  import (
   8  	"internal/abi"
   9  	"unsafe"
  10  )
  11  
  12  //go:cgo_import_dynamic libc_arc4random_buf arc4random_buf "/usr/lib/libSystem.B.dylib"
  13  
  14  func libc_arc4random_buf_trampoline()
  15  
  16  // ARC4Random calls the macOS arc4random_buf(3) function.
  17  func ARC4Random(p []byte) {
  18  	// macOS 11 and 12 abort if length is 0.
  19  	if len(p) == 0 {
  20  		return
  21  	}
  22  	syscall_syscall(abi.FuncPCABI0(libc_arc4random_buf_trampoline),
  23  		uintptr(unsafe.Pointer(unsafe.SliceData(p))), uintptr(len(p)), 0)
  24  }
  25