458 lines
15 KiB
C++
458 lines
15 KiB
C++
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// Copyright 2015 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/der/parse_values.h"
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#include <stdint.h>
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#include "testing/gtest/include/gtest/gtest.h"
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namespace net::der::test {
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namespace {
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template <size_t N>
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Input FromStringLiteral(const char(&data)[N]) {
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// Strings are null-terminated. The null terminating byte shouldn't be
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// included in the Input, so the size is N - 1 instead of N.
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return Input(reinterpret_cast<const uint8_t*>(data), N - 1);
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}
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} // namespace
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TEST(ParseValuesTest, ParseBool) {
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uint8_t buf[] = {0xFF, 0x00};
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Input value(buf, 1);
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bool out;
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EXPECT_TRUE(ParseBool(value, &out));
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EXPECT_TRUE(out);
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buf[0] = 0;
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EXPECT_TRUE(ParseBool(value, &out));
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EXPECT_FALSE(out);
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buf[0] = 1;
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EXPECT_FALSE(ParseBool(value, &out));
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EXPECT_TRUE(ParseBoolRelaxed(value, &out));
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EXPECT_TRUE(out);
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buf[0] = 0xFF;
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value = Input(buf, 2);
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EXPECT_FALSE(ParseBool(value, &out));
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value = Input(buf, 0);
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EXPECT_FALSE(ParseBool(value, &out));
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}
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TEST(ParseValuesTest, ParseTimes) {
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GeneralizedTime out;
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EXPECT_TRUE(ParseUTCTime(FromStringLiteral("140218161200Z"), &out));
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// DER-encoded UTCTime must end with 'Z'.
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EXPECT_FALSE(ParseUTCTime(FromStringLiteral("140218161200X"), &out));
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// Check that a negative number (-4 in this case) doesn't get parsed as
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// a 2-digit number.
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EXPECT_FALSE(ParseUTCTime(FromStringLiteral("-40218161200Z"), &out));
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// Check that numbers with a leading 0 don't get parsed in octal by making
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// the second digit an invalid octal digit (e.g. 09).
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EXPECT_TRUE(ParseUTCTime(FromStringLiteral("090218161200Z"), &out));
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// Check that the length is validated.
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EXPECT_FALSE(ParseUTCTime(FromStringLiteral("140218161200"), &out));
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EXPECT_FALSE(ParseUTCTime(FromStringLiteral("140218161200Z0"), &out));
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// Check strictness of UTCTime parsers.
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EXPECT_FALSE(ParseUTCTime(FromStringLiteral("1402181612Z"), &out));
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// Check format of GeneralizedTime.
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// Years 0 and 9999 are allowed.
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EXPECT_TRUE(ParseGeneralizedTime(FromStringLiteral("00000101000000Z"), &out));
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EXPECT_EQ(0, out.year);
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EXPECT_TRUE(ParseGeneralizedTime(FromStringLiteral("99991231235960Z"), &out));
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EXPECT_EQ(9999, out.year);
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// Leap seconds are allowed.
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EXPECT_TRUE(ParseGeneralizedTime(FromStringLiteral("20140218161260Z"), &out));
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// But nothing larger than a leap second.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140218161261Z"), &out));
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// Minutes only go up to 59.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140218166000Z"), &out));
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// Hours only go up to 23.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140218240000Z"), &out));
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// The 0th day of a month is invalid.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140200161200Z"), &out));
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// The 0th month is invalid.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140018161200Z"), &out));
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// Months greater than 12 are invalid.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20141318161200Z"), &out));
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// Some months have 31 days.
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EXPECT_TRUE(ParseGeneralizedTime(FromStringLiteral("20140131000000Z"), &out));
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// September has only 30 days.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140931000000Z"), &out));
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// February has only 28 days...
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140229000000Z"), &out));
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// ... unless it's a leap year.
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EXPECT_TRUE(ParseGeneralizedTime(FromStringLiteral("20160229000000Z"), &out));
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// There aren't any leap days in years divisible by 100...
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("21000229000000Z"), &out));
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// ...unless it's also divisible by 400.
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EXPECT_TRUE(ParseGeneralizedTime(FromStringLiteral("20000229000000Z"), &out));
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// Check more perverse invalid inputs.
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// Check that trailing null bytes are not ignored.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20001231010203Z\0"), &out));
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// Check what happens when a null byte is in the middle of the input.
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EXPECT_FALSE(ParseGeneralizedTime(FromStringLiteral(
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"200\0"
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"1231010203Z"),
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&out));
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// The year can't be in hex.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("0x201231000000Z"), &out));
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// The last byte must be 'Z'.
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20001231000000X"), &out));
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// Check that the length is validated.
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EXPECT_FALSE(ParseGeneralizedTime(FromStringLiteral("20140218161200"), &out));
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EXPECT_FALSE(
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ParseGeneralizedTime(FromStringLiteral("20140218161200Z0"), &out));
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}
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TEST(ParseValuesTest, TimesCompare) {
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GeneralizedTime time1;
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GeneralizedTime time2;
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GeneralizedTime time3;
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ASSERT_TRUE(
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ParseGeneralizedTime(FromStringLiteral("20140218161200Z"), &time1));
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// Test that ParseUTCTime correctly normalizes the year.
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ASSERT_TRUE(ParseUTCTime(FromStringLiteral("150218161200Z"), &time2));
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ASSERT_TRUE(
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ParseGeneralizedTime(FromStringLiteral("20160218161200Z"), &time3));
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EXPECT_TRUE(time1 < time2);
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EXPECT_TRUE(time2 < time3);
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EXPECT_TRUE(time2 > time1);
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EXPECT_TRUE(time2 >= time1);
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EXPECT_TRUE(time2 <= time3);
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EXPECT_TRUE(time1 <= time1);
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EXPECT_TRUE(time1 >= time1);
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}
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TEST(ParseValuesTest, UTCTimeRange) {
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GeneralizedTime time;
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ASSERT_TRUE(
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ParseGeneralizedTime(FromStringLiteral("20140218161200Z"), &time));
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EXPECT_TRUE(time.InUTCTimeRange());
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time.year = 1950;
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EXPECT_TRUE(time.InUTCTimeRange());
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time.year = 1949;
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EXPECT_FALSE(time.InUTCTimeRange());
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time.year = 2049;
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EXPECT_TRUE(time.InUTCTimeRange());
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time.year = 2050;
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EXPECT_FALSE(time.InUTCTimeRange());
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}
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struct Uint64TestData {
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bool should_pass;
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const uint8_t input[9];
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size_t length;
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uint64_t expected_value;
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};
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const Uint64TestData kUint64TestData[] = {
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{true, {0x00}, 1, 0},
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// This number fails because it is not a minimal representation.
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{false, {0x00, 0x00}, 2},
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{true, {0x01}, 1, 1},
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{false, {0xFF}, 1},
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{true, {0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 8, INT64_MAX},
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{true,
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{0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
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9,
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UINT64_MAX},
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// This number fails because it is negative.
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{false, {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 8},
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{false, {0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 8},
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{false, {0x00, 0x01}, 2},
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{false, {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09}, 9},
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{false, {0}, 0},
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};
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TEST(ParseValuesTest, ParseUint64) {
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for (size_t i = 0; i < std::size(kUint64TestData); i++) {
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const Uint64TestData& test_case = kUint64TestData[i];
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SCOPED_TRACE(i);
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uint64_t result;
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EXPECT_EQ(test_case.should_pass,
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ParseUint64(Input(test_case.input, test_case.length), &result));
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if (test_case.should_pass)
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EXPECT_EQ(test_case.expected_value, result);
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}
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}
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struct Uint8TestData {
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bool should_pass;
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const uint8_t input[9];
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size_t length;
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uint8_t expected_value;
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};
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const Uint8TestData kUint8TestData[] = {
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{true, {0x00}, 1, 0},
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// This number fails because it is not a minimal representation.
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{false, {0x00, 0x00}, 2},
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{true, {0x01}, 1, 1},
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{false, {0x01, 0xFF}, 2},
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{false, {0x03, 0x83}, 2},
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{true, {0x7F}, 1, 0x7F},
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{true, {0x00, 0xFF}, 2, 0xFF},
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// This number fails because it is negative.
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{false, {0xFF}, 1},
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{false, {0x80}, 1},
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{false, {0x00, 0x01}, 2},
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{false, {0}, 0},
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};
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TEST(ParseValuesTest, ParseUint8) {
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for (size_t i = 0; i < std::size(kUint8TestData); i++) {
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const Uint8TestData& test_case = kUint8TestData[i];
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SCOPED_TRACE(i);
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uint8_t result;
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EXPECT_EQ(test_case.should_pass,
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ParseUint8(Input(test_case.input, test_case.length), &result));
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if (test_case.should_pass)
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EXPECT_EQ(test_case.expected_value, result);
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}
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}
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struct IsValidIntegerTestData {
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bool should_pass;
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const uint8_t input[2];
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size_t length;
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bool negative;
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};
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const IsValidIntegerTestData kIsValidIntegerTestData[] = {
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// Empty input (invalid DER).
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{false, {0x00}, 0},
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// The correct encoding for zero.
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{true, {0x00}, 1, false},
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// Invalid representation of zero (not minimal)
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{false, {0x00, 0x00}, 2},
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// Valid single byte negative numbers.
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{true, {0x80}, 1, true},
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{true, {0xFF}, 1, true},
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// Non-minimal negative number.
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{false, {0xFF, 0x80}, 2},
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// Positive number with a legitimate leading zero.
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{true, {0x00, 0x80}, 2, false},
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// A legitimate negative number that starts with FF (MSB of second byte is
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// 0 so OK).
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{true, {0xFF, 0x7F}, 2, true},
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};
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TEST(ParseValuesTest, IsValidInteger) {
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for (size_t i = 0; i < std::size(kIsValidIntegerTestData); i++) {
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const auto& test_case = kIsValidIntegerTestData[i];
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SCOPED_TRACE(i);
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bool negative;
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EXPECT_EQ(
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test_case.should_pass,
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IsValidInteger(Input(test_case.input, test_case.length), &negative));
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if (test_case.should_pass)
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EXPECT_EQ(test_case.negative, negative);
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}
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}
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// Tests parsing an empty BIT STRING.
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TEST(ParseValuesTest, ParseBitStringEmptyNoUnusedBits) {
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const uint8_t kData[] = {0x00};
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absl::optional<BitString> bit_string = ParseBitString(Input(kData));
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ASSERT_TRUE(bit_string.has_value());
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EXPECT_EQ(0u, bit_string->unused_bits());
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EXPECT_EQ(0u, bit_string->bytes().Length());
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EXPECT_FALSE(bit_string->AssertsBit(0));
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EXPECT_FALSE(bit_string->AssertsBit(1));
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EXPECT_FALSE(bit_string->AssertsBit(3));
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}
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// Tests parsing an empty BIT STRING that incorrectly claims one unused bit.
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TEST(ParseValuesTest, ParseBitStringEmptyOneUnusedBit) {
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const uint8_t kData[] = {0x01};
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absl::optional<BitString> bit_string = ParseBitString(Input(kData));
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EXPECT_FALSE(bit_string.has_value());
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}
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// Tests parsing an empty BIT STRING that is not minmally encoded (the entire
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// last byte is comprised of unused bits).
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TEST(ParseValuesTest, ParseBitStringNonEmptyTooManyUnusedBits) {
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const uint8_t kData[] = {0x08, 0x00};
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absl::optional<BitString> bit_string = ParseBitString(Input(kData));
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EXPECT_FALSE(bit_string.has_value());
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}
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// Tests parsing a BIT STRING of 7 bits each of which are 1.
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TEST(ParseValuesTest, ParseBitStringSevenOneBits) {
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const uint8_t kData[] = {0x01, 0xFE};
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absl::optional<BitString> bit_string = ParseBitString(Input(kData));
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ASSERT_TRUE(bit_string.has_value());
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EXPECT_EQ(1u, bit_string->unused_bits());
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EXPECT_EQ(1u, bit_string->bytes().Length());
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EXPECT_EQ(0xFE, bit_string->bytes().UnsafeData()[0]);
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EXPECT_TRUE(bit_string->AssertsBit(0));
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EXPECT_TRUE(bit_string->AssertsBit(1));
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EXPECT_TRUE(bit_string->AssertsBit(2));
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EXPECT_TRUE(bit_string->AssertsBit(3));
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EXPECT_TRUE(bit_string->AssertsBit(4));
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EXPECT_TRUE(bit_string->AssertsBit(5));
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|
EXPECT_TRUE(bit_string->AssertsBit(6));
|
||
|
|
EXPECT_FALSE(bit_string->AssertsBit(7));
|
||
|
|
EXPECT_FALSE(bit_string->AssertsBit(8));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Tests parsing a BIT STRING of 7 bits each of which are 1. The unused bit
|
||
|
|
// however is set to 1, which is an invalid encoding.
|
||
|
|
TEST(ParseValuesTest, ParseBitStringSevenOneBitsUnusedBitIsOne) {
|
||
|
|
const uint8_t kData[] = {0x01, 0xFF};
|
||
|
|
|
||
|
|
absl::optional<BitString> bit_string = ParseBitString(Input(kData));
|
||
|
|
EXPECT_FALSE(bit_string.has_value());
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ParseValuesTest, DISABLED_ParseIA5String) {
|
||
|
|
const Input valid_der({0x46, 0x6f, 0x6f, 0x20, 0x62, 0x61, 0x72, 0x01, 0x7f});
|
||
|
|
std::string s;
|
||
|
|
EXPECT_TRUE(ParseIA5String(valid_der, &s));
|
||
|
|
EXPECT_EQ("Foo bar\x01\x7f", s);
|
||
|
|
|
||
|
|
// 0x80 is not a valid character in IA5String.
|
||
|
|
const Input invalid_der({0x46, 0x6f, 0x80, 0x20, 0x62, 0x61, 0x72});
|
||
|
|
EXPECT_FALSE(ParseIA5String(invalid_der, &s));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ParseValuesTest, DISABLED_ParseVisibleString) {
|
||
|
|
const Input valid_der({0x46, 0x6f, 0x6f, 0x20, 0x62, 0x61, 0x72, 0x7e});
|
||
|
|
std::string s;
|
||
|
|
EXPECT_TRUE(ParseVisibleString(valid_der, &s));
|
||
|
|
EXPECT_EQ("Foo bar\x7e", s);
|
||
|
|
|
||
|
|
// 0x7f is not a valid character in VisibleString
|
||
|
|
const Input invalid_der({0x46, 0x6f, 0x7f, 0x20, 0x62, 0x61, 0x72});
|
||
|
|
EXPECT_FALSE(ParseVisibleString(invalid_der, &s));
|
||
|
|
|
||
|
|
// 0x1f is not a valid character in VisibleString
|
||
|
|
const Input invalid_der2({0x46, 0x6f, 0x1f, 0x20, 0x62, 0x61, 0x72});
|
||
|
|
EXPECT_FALSE(ParseVisibleString(invalid_der2, &s));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ParseValuesTest, DISABLED_ParsePrintableString) {
|
||
|
|
const Input valid_der({0x46, 0x6f, 0x6f, 0x20, 0x62, 0x61, 0x72});
|
||
|
|
std::string s;
|
||
|
|
EXPECT_TRUE(ParsePrintableString(valid_der, &s));
|
||
|
|
EXPECT_EQ("Foo bar", s);
|
||
|
|
|
||
|
|
// 0x5f '_' is not a valid character in PrintableString.
|
||
|
|
const Input invalid_der({0x46, 0x6f, 0x5f, 0x20, 0x62, 0x61, 0x72});
|
||
|
|
EXPECT_FALSE(ParsePrintableString(invalid_der, &s));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ParseValuesTest, DISABLED_ParseTeletexStringAsLatin1) {
|
||
|
|
const Input valid_der({0x46, 0x6f, 0xd6, 0x20, 0x62, 0x61, 0x72});
|
||
|
|
std::string s;
|
||
|
|
EXPECT_TRUE(ParseTeletexStringAsLatin1(valid_der, &s));
|
||
|
|
EXPECT_EQ("FoÖ bar", s);
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ParseValuesTest, DISABLED_ParseBmpString) {
|
||
|
|
const Input valid_der(
|
||
|
|
{0x00, 0x66, 0x00, 0x6f, 0x00, 0x6f, 0x00, 0x62, 0x00, 0x61, 0x00, 0x72});
|
||
|
|
std::string s;
|
||
|
|
EXPECT_TRUE(ParseBmpString(valid_der, &s));
|
||
|
|
EXPECT_EQ("foobar", s);
|
||
|
|
|
||
|
|
const Input valid_nonascii_der({0x27, 0x28, 0x26, 0xa1, 0x2b, 0x50});
|
||
|
|
EXPECT_TRUE(ParseBmpString(valid_nonascii_der, &s));
|
||
|
|
EXPECT_EQ("✨⚡⭐", s);
|
||
|
|
|
||
|
|
// BmpString must encode characters in pairs of 2 bytes.
|
||
|
|
const Input invalid_odd_der({0x00, 0x66, 0x00, 0x6f, 0x00});
|
||
|
|
EXPECT_FALSE(ParseBmpString(invalid_odd_der, &s));
|
||
|
|
|
||
|
|
// UTF-16BE encoding of U+1D11E, MUSICAL SYMBOL G CLEF, which is not valid in
|
||
|
|
// UCS-2.
|
||
|
|
const Input invalid_bmp_valid_utf16_with_surrogate({0xd8, 0x34, 0xdd, 0x1e});
|
||
|
|
EXPECT_FALSE(ParseBmpString(invalid_bmp_valid_utf16_with_surrogate, &s));
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(ParseValuesTest, DISABLED_ParseUniversalString) {
|
||
|
|
const Input valid_der({0x00, 0x00, 0x00, 0x66, 0x00, 0x00, 0x00, 0x6f,
|
||
|
|
0x00, 0x00, 0x00, 0x6f, 0x00, 0x00, 0x00, 0x62,
|
||
|
|
0x00, 0x00, 0x00, 0x61, 0x00, 0x00, 0x00, 0x72});
|
||
|
|
std::string s;
|
||
|
|
EXPECT_TRUE(ParseUniversalString(valid_der, &s));
|
||
|
|
EXPECT_EQ("foobar", s);
|
||
|
|
|
||
|
|
const Input valid_non_ascii_der({0x0, 0x1, 0xf4, 0xe, 0x0, 0x0, 0x0,
|
||
|
|
0x20, 0x0, 0x1, 0xd1, 0x1e, 0x0, 0x0,
|
||
|
|
0x26, 0x69, 0x0, 0x0, 0x26, 0x6b});
|
||
|
|
EXPECT_TRUE(ParseUniversalString(valid_non_ascii_der, &s));
|
||
|
|
EXPECT_EQ("🐎 𝄞♩♫", s);
|
||
|
|
|
||
|
|
// UniversalString must encode characters in groups of 4 bytes.
|
||
|
|
const Input invalid_non_4_multiple_der({0x00, 0x00, 0x00, 0x66, 0x00, 0x00});
|
||
|
|
EXPECT_FALSE(ParseUniversalString(invalid_non_4_multiple_der, &s));
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace net::der::test
|