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/*
* Copyright (c) 2025 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/base64.h"
#include <optional>
#include <string>
#include "absl/strings/string_view.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
using ::testing::Eq;
using ::testing::Optional;
using ::testing::SizeIs;
using ::testing::TestWithParam;
TEST(Base64Test, Encode) {
std::string data{0x64, 0x65, 0x66};
EXPECT_THAT(Base64Encode(data), Eq("ZGVm"));
}
TEST(Base64Test, EncodeDecode) {
std::string data{0x01, 0x02, 0x03, 0x04, 0x05};
EXPECT_THAT(Base64Decode(Base64Encode(data)), Optional(Eq(data)));
}
TEST(Base64Test, DecodeCertificate) {
// Certificate data often contains newlines, which are not valid base64
// characters but parsable using the forgiving option.
constexpr absl::string_view kExampleCertificateData =
"MIIB6TCCAVICAQYwDQYJKoZIhvcNAQEEBQAwWzELMAkGA1UEBhMCQVUxEzARBgNV\n"
"BAgTClF1ZWVuc2xhbmQxGjAYBgNVBAoTEUNyeXB0U29mdCBQdHkgTHRkMRswGQYD\n"
"VQQDExJUZXN0IENBICgxMDI0IGJpdCkwHhcNMDAxMDE2MjIzMTAzWhcNMDMwMTE0\n"
"MjIzMTAzWjBjMQswCQYDVQQGEwJBVTETMBEGA1UECBMKUXVlZW5zbGFuZDEaMBgG\n"
"A1UEChMRQ3J5cHRTb2Z0IFB0eSBMdGQxIzAhBgNVBAMTGlNlcnZlciB0ZXN0IGNl\n"
"cnQgKDUxMiBiaXQpMFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJ+zw4Qnlf8SMVIP\n"
"Fe9GEcStgOY2Ww/dgNdhjeD8ckUJNP5VZkVDTGiXav6ooKXfX3j/7tdkuD8Ey2//\n"
"Kv7+ue0CAwEAATANBgkqhkiG9w0BAQQFAAOBgQCT0grFQeZaqYb5EYfk20XixZV4\n"
"GmyAbXMftG1Eo7qGiMhYzRwGNWxEYojf5PZkYZXvSqZ/ZXHXa4g59jK/rJNnaVGM\n"
"k+xIX8mxQvlV0n5O9PIha5BX5teZnkHKgL8aKKLKW1BK7YTngsfSzzaeame5iKfz\n"
"itAE+OjGF+PFKbwX8Q==\n";
EXPECT_THAT(
Base64Decode(kExampleCertificateData, Base64DecodeOptions::kForgiving),
Optional(SizeIs(493)));
EXPECT_THAT(
Base64Decode(kExampleCertificateData, Base64DecodeOptions::kStrict),
Eq(std::nullopt));
}
struct Base64DecodeTestCase {
std::string name;
std::string data;
std::optional<std::string> result;
};
const Base64DecodeTestCase kBase64DecodeTestCases[] = {
{"InvalidCharacters", "invalid;;;", std::nullopt},
{"InvalidLength", "abcde", std::nullopt},
{"ValidInput", "abcd", "i\xB7\x1D"},
{"ValidInputPadding", "abc=", "i\xB7"},
{"EmptyInput", "", ""},
};
using Base64DecodeTest = TestWithParam<Base64DecodeTestCase>;
INSTANTIATE_TEST_SUITE_P(
Base64DecodeTest,
Base64DecodeTest,
testing::ValuesIn<Base64DecodeTestCase>(kBase64DecodeTestCases),
[](const auto& info) { return info.param.name; });
TEST_P(Base64DecodeTest, TestDecodeStrict) {
absl::string_view data = GetParam().data;
EXPECT_THAT(Base64Decode(data, Base64DecodeOptions::kStrict),
Eq(GetParam().result));
}
TEST_P(Base64DecodeTest, TestDecodeForgiving) {
// Test default value is strict.
EXPECT_THAT(Base64Decode(GetParam().data), Eq(GetParam().result));
}
const Base64DecodeTestCase kBase64DecodeForgivingTestCases[] = {
{
"ForgivingPadding",
"abc",
"i\xB7",
},
{
"WhitespaceForgivenTab",
"ab\tcd",
"i\xB7\x1D",
},
{
"WhitespaceForgivenSpace",
"a bc d",
"i\xB7\x1D",
},
{
"WhitespaceForgivenNewline",
"a\nbc\nd",
"i\xB7\x1D",
},
{
"WhitespaceForgivenCarriageReturn",
"a\r\nbc\rd",
"i\xB7\x1D",
},
{"WhitespaceForgivenLineFeed", "a\fbcd", "i\xB7\x1D"},
};
using Base64DecodeForgivingTest = TestWithParam<Base64DecodeTestCase>;
INSTANTIATE_TEST_SUITE_P(
Base64DecodeTest,
Base64DecodeForgivingTest,
testing::ValuesIn<Base64DecodeTestCase>(kBase64DecodeForgivingTestCases),
[](const auto& info) { return info.param.name; });
TEST_P(Base64DecodeForgivingTest, TestDecodeForgiving) {
EXPECT_THAT(Base64Decode(GetParam().data, Base64DecodeOptions::kForgiving),
Eq(GetParam().result));
}
TEST_P(Base64DecodeForgivingTest, TestDecodeStrictFails) {
// Test default value is strict.
EXPECT_THAT(Base64Decode(GetParam().data), Eq(std::nullopt));
}
} // namespace
} // namespace webrtc
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