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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/os_crypt/os_crypt.h"
#include <string>
#include "base/compiler_specific.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class OSCryptTest : public testing::Test {
public:
OSCryptTest() {}
void SetUp() override {
#if defined(OS_MACOSX)
OSCrypt::UseMockKeychain(true);
#endif
}
private:
DISALLOW_COPY_AND_ASSIGN(OSCryptTest);
};
TEST_F(OSCryptTest, String16EncryptionDecryption) {
base::string16 plaintext;
base::string16 result;
std::string utf8_plaintext;
std::string utf8_result;
std::string ciphertext;
// Test borderline cases (empty strings).
EXPECT_TRUE(OSCrypt::EncryptString16(plaintext, &ciphertext));
EXPECT_TRUE(OSCrypt::DecryptString16(ciphertext, &result));
EXPECT_EQ(plaintext, result);
// Test a simple string.
plaintext = base::ASCIIToUTF16("hello");
EXPECT_TRUE(OSCrypt::EncryptString16(plaintext, &ciphertext));
EXPECT_TRUE(OSCrypt::DecryptString16(ciphertext, &result));
EXPECT_EQ(plaintext, result);
// Test a 16-byte aligned string. This previously hit a boundary error in
// base::OSCrypt::Crypt() on Mac.
plaintext = base::ASCIIToUTF16("1234567890123456");
EXPECT_TRUE(OSCrypt::EncryptString16(plaintext, &ciphertext));
EXPECT_TRUE(OSCrypt::DecryptString16(ciphertext, &result));
EXPECT_EQ(plaintext, result);
// Test Unicode.
base::char16 wchars[] = { 0xdbeb, 0xdf1b, 0x4e03, 0x6708, 0x8849,
0x661f, 0x671f, 0x56db, 0x597c, 0x4e03,
0x6708, 0x56db, 0x6708, 0xe407, 0xdbaf,
0xdeb5, 0x4ec5, 0x544b, 0x661f, 0x671f,
0x65e5, 0x661f, 0x671f, 0x4e94, 0xd8b1,
0xdce1, 0x7052, 0x5095, 0x7c0b, 0xe586, 0};
plaintext = wchars;
utf8_plaintext = base::UTF16ToUTF8(plaintext);
EXPECT_EQ(plaintext, base::UTF8ToUTF16(utf8_plaintext));
EXPECT_TRUE(OSCrypt::EncryptString16(plaintext, &ciphertext));
EXPECT_TRUE(OSCrypt::DecryptString16(ciphertext, &result));
EXPECT_EQ(plaintext, result);
EXPECT_TRUE(OSCrypt::DecryptString(ciphertext, &utf8_result));
EXPECT_EQ(utf8_plaintext, base::UTF16ToUTF8(result));
EXPECT_TRUE(OSCrypt::EncryptString(utf8_plaintext, &ciphertext));
EXPECT_TRUE(OSCrypt::DecryptString16(ciphertext, &result));
EXPECT_EQ(plaintext, result);
EXPECT_TRUE(OSCrypt::DecryptString(ciphertext, &utf8_result));
EXPECT_EQ(utf8_plaintext, base::UTF16ToUTF8(result));
}
TEST_F(OSCryptTest, EncryptionDecryption) {
std::string plaintext;
std::string result;
std::string ciphertext;
// Test borderline cases (empty strings).
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
ASSERT_TRUE(OSCrypt::DecryptString(ciphertext, &result));
EXPECT_EQ(plaintext, result);
// Test a simple string.
plaintext = "hello";
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
ASSERT_TRUE(OSCrypt::DecryptString(ciphertext, &result));
EXPECT_EQ(plaintext, result);
// Make sure it null terminates.
plaintext.assign("hello", 3);
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
ASSERT_TRUE(OSCrypt::DecryptString(ciphertext, &result));
EXPECT_EQ(plaintext, "hel");
}
TEST_F(OSCryptTest, CypherTextDiffers) {
std::string plaintext;
std::string result;
std::string ciphertext;
// Test borderline cases (empty strings).
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
ASSERT_TRUE(OSCrypt::DecryptString(ciphertext, &result));
// |cyphertext| is empty on the Mac, different on Windows.
EXPECT_TRUE(ciphertext.empty() || plaintext != ciphertext);
EXPECT_EQ(plaintext, result);
// Test a simple string.
plaintext = "hello";
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
ASSERT_TRUE(OSCrypt::DecryptString(ciphertext, &result));
EXPECT_NE(plaintext, ciphertext);
EXPECT_EQ(plaintext, result);
// Make sure it null terminates.
plaintext.assign("hello", 3);
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
ASSERT_TRUE(OSCrypt::DecryptString(ciphertext, &result));
EXPECT_NE(plaintext, ciphertext);
EXPECT_EQ(result, "hel");
}
TEST_F(OSCryptTest, DecryptError) {
std::string plaintext;
std::string result;
std::string ciphertext;
// Test a simple string, messing with ciphertext prior to decrypting.
plaintext = "hello";
ASSERT_TRUE(OSCrypt::EncryptString(plaintext, &ciphertext));
EXPECT_NE(plaintext, ciphertext);
ASSERT_LT(4UL, ciphertext.size());
ciphertext[3] = ciphertext[3] + 1;
EXPECT_FALSE(OSCrypt::DecryptString(ciphertext, &result));
EXPECT_NE(plaintext, result);
EXPECT_TRUE(result.empty());
}
} // namespace
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