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-rw-r--r--security/nss/gtests/der_gtest/der_getint_unittest.cc122
1 files changed, 122 insertions, 0 deletions
diff --git a/security/nss/gtests/der_gtest/der_getint_unittest.cc b/security/nss/gtests/der_gtest/der_getint_unittest.cc
new file mode 100644
index 000000000..e4b225e5c
--- /dev/null
+++ b/security/nss/gtests/der_gtest/der_getint_unittest.cc
@@ -0,0 +1,122 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <climits>
+#include <memory>
+#include "nss.h"
+#include "pk11pub.h"
+#include "secutil.h"
+
+#include "gtest/gtest.h"
+#include "scoped_ptrs.h"
+
+namespace nss_test {
+
+class DERIntegerDecodingTest : public ::testing::Test {
+ public:
+ void TestGetInteger(long number, unsigned char *der_number,
+ unsigned int len) {
+ SECItem input = {siBuffer, der_number, len};
+ EXPECT_EQ(number, DER_GetInteger(&input));
+ }
+
+ void GetDerLongMax(unsigned char *der_number, unsigned int len) {
+ der_number[0] = 0x7F;
+ for (unsigned int i = 1; i < len; ++i) {
+ der_number[i] = 0xFF;
+ }
+ }
+
+ void GetDerLongMin(unsigned char *der_number, unsigned int len) {
+ der_number[0] = 0x80;
+ for (unsigned int i = 1; i < len; ++i) {
+ der_number[i] = 0x00;
+ }
+ }
+};
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMinus126) {
+ unsigned char der[] = {0x82};
+ TestGetInteger(-126, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLong130) {
+ unsigned char der[] = {0x00, 0x82};
+ TestGetInteger(130, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLong130Padded) {
+ unsigned char der[sizeof(long) * 2] = {0};
+ der[sizeof(der) - 1] = {0x82};
+ TestGetInteger(130, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLong0) {
+ unsigned char der[] = {0x00};
+ TestGetInteger(0, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLong1) {
+ unsigned char der[] = {0x01};
+ TestGetInteger(1, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMinus1) {
+ unsigned char der[] = {0xFF};
+ TestGetInteger(-1, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMinus1Padded) {
+ unsigned char der[sizeof(long) * 2];
+ memset(der, 0xFF, sizeof(der));
+ TestGetInteger(-1, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMax) {
+ unsigned char der[sizeof(long)];
+ GetDerLongMax(der, sizeof(long));
+ TestGetInteger(LONG_MAX, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMin) {
+ unsigned char der[sizeof(long)];
+ GetDerLongMin(der, sizeof(long));
+ TestGetInteger(LONG_MIN, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMaxMinus1) {
+ unsigned char der[sizeof(long)];
+ GetDerLongMax(der, sizeof(long));
+ der[sizeof(long) - 1] = 0xFE;
+ TestGetInteger(LONG_MAX - 1, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMinPlus1) {
+ unsigned char der[sizeof(long)];
+ GetDerLongMin(der, sizeof(long));
+ der[sizeof(long) - 1] = 0x01;
+ TestGetInteger(LONG_MIN + 1, der, sizeof(der));
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMinMinus1) {
+ unsigned char der[sizeof(long) + 1];
+ GetDerLongMax(der, sizeof(long) + 1);
+ der[0] = 0xFF;
+ der[1] = 0x7F;
+ TestGetInteger(LONG_MIN, der, sizeof(der));
+ EXPECT_EQ(SEC_ERROR_BAD_DER, PORT_GetError());
+}
+
+TEST_F(DERIntegerDecodingTest, DecodeLongMaxPlus1) {
+ unsigned char der[sizeof(long) + 1];
+ GetDerLongMin(der, sizeof(long) + 1);
+ der[0] = 0x00;
+ der[1] = 0x80;
+ TestGetInteger(LONG_MAX, der, sizeof(der));
+ EXPECT_EQ(SEC_ERROR_BAD_DER, PORT_GetError());
+}
+
+} // namespace nss_test