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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/wtf/text/base64.h"
#include <optional>
#include <string_view>
#include "base/containers/span.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace WTF {
TEST(Base64Test, Encode) {
struct {
std::string_view in;
Vector<char> expected_out;
} kTestCases[] = {{"", {}},
{"i", {'a', 'Q', '=', '='}},
{"i\xB7", {'a', 'b', 'c', '='}},
{"i\xB7\x1D", {'a', 'b', 'c', 'd'}}};
for (const auto& test : kTestCases) {
auto in = base::as_byte_span(test.in);
Vector<char> out_vec;
Base64Encode(in, out_vec);
EXPECT_EQ(out_vec, test.expected_out);
String out_str = Base64Encode(in);
EXPECT_EQ(out_str, String(test.expected_out));
}
}
TEST(Base64Test, DecodeNoPaddingValidation) {
struct {
const char* in;
const char* expected_out;
} kTestCases[] = {
// Inputs that are multiples of 4 always succeed.
{"abcd", "i\xB7\x1D"},
{"abc=", "i\xB7"},
{"abcdefgh", "i\xB7\x1Dy\xF8!"},
// Lack of proper padding (to a multiple of 4) always succeeds if
// len % 4 != 1.
{"abcdef", "i\xB7\x1Dy"},
{"abc", "i\xB7"},
{"ab", "i"},
// Invalid padding is ignored if kNoPaddingValidation is set.
{"abcd=", "i\xB7\x1D"},
{"abcd==", "i\xB7\x1D"},
{"abcd===", "i\xB7\x1D"},
{"abcd==============", "i\xB7\x1D"},
{"=", ""},
// Whitespace should not be allowed if kNoPaddingValidation is set.
{" a bcd", nullptr},
{"ab\t\tc=", nullptr},
{"ab c\ndefgh ", nullptr},
// Failures that should apply in all decoding modes.
{"abc&", nullptr},
{"abcde", nullptr},
{"a", nullptr},
// Empty string should yield an empty result.
{"", ""},
};
for (const auto& test : kTestCases) {
SCOPED_TRACE(::testing::Message() << test.in);
Vector<uint8_t> out;
String in = String(test.in);
bool expected_success = test.expected_out != nullptr;
Vector<uint8_t> expected_out;
if (expected_success) {
expected_out.insert(0, test.expected_out, strlen(test.expected_out));
}
bool success_8bit = Base64Decode(in, out);
EXPECT_EQ(expected_success, success_8bit);
if (expected_success) {
EXPECT_EQ(expected_out, out);
}
out.clear();
in.Ensure16Bit();
bool success_16bit = Base64Decode(in, out);
EXPECT_EQ(expected_success, success_16bit);
if (expected_success) {
EXPECT_EQ(expected_out, out);
}
}
}
TEST(Base64Test, ForgivingBase64Decode) {
struct {
const char* in;
const char* expected_out;
} kTestCases[] = {
// Inputs that are multiples of 4 always succeed.
{"abcd", "i\xB7\x1D"},
{"abc=", "i\xB7"},
{"abcdefgh", "i\xB7\x1Dy\xF8!"},
// Lack of proper padding (to a multiple of 4) always succeeds if
// len % 4 != 1.
{"abcdef", "i\xB7\x1Dy"},
{"abc", "i\xB7"},
{"ab", "i"},
// Invalid padding causes failure if kForgiving is set.
{"abcd=", nullptr},
{"abcd==", nullptr},
{"abcd===", nullptr},
{"abcd==============", nullptr},
{"=", nullptr},
// Whitespace should be allow if kForgiving is set.
{" a bcd", "i\xB7\x1D"},
{"ab\t\tc=", "i\xB7"},
{"ab c\ndefgh", "i\xB7\x1Dy\xF8!"},
// Failures that should apply in all decoding modes.
{"abc&", nullptr},
{"abcde", nullptr},
{"a", nullptr},
// Empty string should yield an empty result.
{"", ""},
};
for (const auto& test : kTestCases) {
SCOPED_TRACE(::testing::Message() << test.in);
Vector<uint8_t> out;
String in = String(test.in);
bool expected_success = test.expected_out != nullptr;
Vector<uint8_t> expected_out;
if (expected_success) {
expected_out.insert(0, test.expected_out, strlen(test.expected_out));
}
bool success_8bit = Base64Decode(in, out, Base64DecodePolicy::kForgiving);
EXPECT_EQ(expected_success, success_8bit);
if (expected_success) {
EXPECT_EQ(expected_out, out);
}
out.clear();
in.Ensure16Bit();
bool success_16bit = Base64Decode(in, out, Base64DecodePolicy::kForgiving);
EXPECT_EQ(expected_success, success_16bit);
if (expected_success) {
EXPECT_EQ(expected_out, out);
}
}
}
} // namespace WTF
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