3 files changed, 81 insertions, 0 deletions
diff --git a/src/apps/ipa-verify/main.cpp b/src/apps/ipa-verify/main.cpp
new file mode 100644
index 00000000..76ba5073
--- /dev/null
+++ b/src/apps/ipa-verify/main.cpp
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2023, Ideas on Board Oy
+ *
+ * ipa_verify.cpp - Verify signature on an IPA module
+ */
+
+#include <iostream>
+#include <libgen.h>
+
+#include <libcamera/base/file.h>
+#include <libcamera/base/span.h>
+
+#include "libcamera/internal/ipa_manager.h"
+#include "libcamera/internal/ipa_module.h"
+
+using namespace libcamera;
+
+namespace {
+
+bool isSignatureValid(IPAModule *ipa)
+{
+	File file{ ipa->path() };
+	if (!file.open(File::OpenModeFlag::ReadOnly))
+		return false;
+
+	Span<uint8_t> data = file.map();
+	if (data.empty())
+		return false;
+
+	return IPAManager::pubKey().verify(data, ipa->signature());
+}
+
+void usage(char *argv0)
+{
+	std::cout << "Usage: " << basename(argv0) << " ipa_name.so" << std::endl;
+	std::cout << std::endl;
+	std::cout << "Verify the signature of an IPA module. The signature file ipa_name.so.sign is" << std::endl;
+	std::cout << "expected to be in the same directory as the IPA module." << std::endl;
+}
+
+} /* namespace */
+
+int main(int argc, char **argv)
+{
+	if (argc != 2) {
+		usage(argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	IPAModule module{ argv[1] };
+	if (!module.isValid()) {
+		std::cout << "Invalid IPA module " << argv[1] << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	if (!isSignatureValid(&module)) {
+		std::cout << "IPA module signature is invalid" << std::endl;
+		return EXIT_FAILURE;
+	}
+
+	std::cout << "IPA module signature is valid" << std::endl;
+	return 0;
+}
diff --git a/src/apps/ipa-verify/meson.build b/src/apps/ipa-verify/meson.build
new file mode 100644
index 00000000..7fdda3b9
--- /dev/null
+++ b/src/apps/ipa-verify/meson.build
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: CC0-1.0
+
+if not ipa_sign_module
+    subdir_done()
+endif
+
+ipa_verify_sources = files([
+    'main.cpp',
+])
+
+ipa_verify  = executable('ipa_verify', ipa_verify_sources,
+                         dependencies : [
+                             libcamera_private,
+                         ],
+                         install : false)
diff --git a/src/apps/meson.build b/src/apps/meson.build
index 09987635..af632b9a 100644
--- a/src/apps/meson.build
+++ b/src/apps/meson.build
@@ -18,3 +18,5 @@ subdir('lc-compliance')
 
 subdir('cam')
 subdir('qcam')
+
+subdir('ipa-verify')