Extract handle from pipe connection

go.mod

@@ -2,6 +2,9 @@ module github.com/rwinkhart/peercred-mini
 
 go 1.24.2
 
-require golang.org/x/sys v0.32.0
+require (
+	github.com/Microsoft/go-winio v0.6.2
+	golang.org/x/sys v0.32.0
+)
 
 replace golang.org/x/sys => github.com/rwinkhart/sys-freebsd-13-xucred v0.0.0-20250405010723-99a5f0732c0e

go.sum

@@ -1,2 +1,4 @@
+github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
+github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/rwinkhart/sys-freebsd-13-xucred v0.0.0-20250405010723-99a5f0732c0e h1:YRpZcbGU/LVLwK87IURH4Sfye6Fv0ri1IRZ27loWpHs=
 github.com/rwinkhart/sys-freebsd-13-xucred v0.0.0-20250405010723-99a5f0732c0e/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=

peercred_windows.go

@@ -6,20 +6,22 @@ package peercred
 
 import (
 	"fmt"
+	"net"
 
+	"github.com/Microsoft/go-winio"
 	"golang.org/x/sys/windows"
 )
 
 // Get returns the peer credentials for c.
-func Get(h windows.Handle) *Creds {
-	creds, _ := get(&h)
+func Get(c net.Conn) *Creds {
+	creds, _ := get(winio.UtilGetPipeHandle(c))
 	return creds
 }
 
-func get(h *windows.Handle) (*Creds, error) {
+func get(h windows.Handle) (*Creds, error) {
 	// get PID
 	var clientPID uint32
-	windows.GetNamedPipeClientProcessId(*h, &clientPID)
+	windows.GetNamedPipeClientProcessId(h, &clientPID)
 
 	// get SID (UID)
 	var access uint32 = windows.PROCESS_QUERY_INFORMATION