Only build privkey.go on iOS

privkey_ios.go

@@ -0,0 +1,26 @@
+//go:build ios
+
+package main
+
+// #include <stdlib.h>
+// #include <string.h>
+// #include "types.h"
+import "C"
+import (
+	"unsafe"
+
+	"github.com/rwinkhart/libmutton/privkey"
+)
+
+// SetPrivKeyDataAndEraseFreeInput is meant to be called on iOS
+// prior to any server connections to ensure libmutton can
+// retrieve the correct SSH private key contents (enables
+// loading from keychain).
+//
+//export SetPrivKeyDataAndEraseFreeInput
+func SetPrivKeyDataAndEraseFreeInput(privKeyData C.PascalString) {
+	privKeyDataPtr := unsafe.Pointer(privKeyData.data)
+	privkey.LocalBytes = C.GoBytes(privKeyDataPtr, privKeyData.len)
+	securePtrOverwriteAndFree(privKeyDataPtr, C.size_t(privKeyData.len))
+	FreePascalString(privKeyData)
+}