init

src/shadow.go

@@ -0,0 +1,53 @@
+// +build linux
+
+package main
+
+/*
+#cgo LDFLAGS: -lcrypt
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <crypt.h>
+#include <shadow.h>
+#include <errno.h>
+#include <stdlib.h>
+
+int check_password(const char* username, const char* password) {
+	struct spwd *shadow_entry = getspnam(username);
+	if (!shadow_entry) {
+		return -1; // User not found or error
+	}
+
+	const char *shadow_hash = shadow_entry->sp_pwdp;
+	if (!shadow_hash) {
+		return -2;
+	}
+
+	char *calculated_hash = crypt(password, shadow_hash);
+	if (!calculated_hash) {
+		return -3; // Error in crypt
+	}
+
+	return strcmp(shadow_hash, calculated_hash) == 0;
+}
+*/
+import "C"
+import (
+"fmt"
+//"os"
+"unsafe"
+)
+
+func checkPassword(username, password string) (bool, error) {
+	cUsername := C.CString(username)
+	cPassword := C.CString(password)
+	defer C.free(unsafe.Pointer(cUsername))
+	defer C.free(unsafe.Pointer(cPassword))
+
+	result := C.check_password(cUsername, cPassword)
+	switch result {
+	case 1: return true, nil
+	case 0: return false, nil
+	default: return false, fmt.Errorf("Auth Error")
+	}
+}