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1 /**
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2 * Cloud storage plugins for Orthanc
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3 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18 #include "gtest/gtest.h"
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19
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20 #include "../Common/EncryptionHelpers.h"
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21 #include <boost/chrono/chrono.hpp>
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22 #include <boost/date_time.hpp>
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23
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24 TEST(EncryptionHelpers, GenerateKey)
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25 {
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26 CryptoPP::SecByteBlock key1, key2;
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27 EncryptionHelpers::GenerateKey(key1);
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28 EncryptionHelpers::GenerateKey(key2);
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29
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30 // std::cout << EncryptionHelpers::ToHexString(key1) << std::endl;
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31 // std::cout << EncryptionHelpers::ToHexString(key2) << std::endl;
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32
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33 ASSERT_NE(key1, key2);
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34
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35 ASSERT_EQ(32, key1.size()); // right now, we work with 256bits key
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36 ASSERT_EQ(32*2, EncryptionHelpers::ToHexString(key1).size());
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37 }
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38
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39 TEST(EncryptionHelpers, EncryptDecryptSimpleText)
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40 {
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41 CryptoPP::SecByteBlock masterKey;
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42 EncryptionHelpers::GenerateKey(masterKey);
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43
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44 EncryptionHelpers crypto;
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45 crypto.SetCurrentMasterKey(1, masterKey);
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46
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47 std::string plainTextMessage = "Plain text message";
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48 std::string encryptedMessage;
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49
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50 crypto.Encrypt(encryptedMessage, plainTextMessage);
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51
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52 std::string decryptedMessage;
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53
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54 crypto.Decrypt(decryptedMessage, encryptedMessage);
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55
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56 ASSERT_EQ(plainTextMessage, decryptedMessage);
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57 }
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58
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59 TEST(EncryptionHelpers, EncryptDecrypt1byteText)
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60 {
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61 CryptoPP::SecByteBlock masterKey;
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62 EncryptionHelpers::GenerateKey(masterKey);
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63
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64 EncryptionHelpers crypto;
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65 crypto.SetCurrentMasterKey(1, masterKey);
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66
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67 std::string plainTextMessage = "P";
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68 std::string encryptedMessage;
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69
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70 crypto.Encrypt(encryptedMessage, plainTextMessage);
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71
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72 std::string decryptedMessage;
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73
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74 crypto.Decrypt(decryptedMessage, encryptedMessage);
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75
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76 ASSERT_EQ(plainTextMessage, decryptedMessage);
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77 }
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78
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79 TEST(EncryptionHelpers, EncryptDecrypt0byteText)
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80 {
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81 CryptoPP::SecByteBlock masterKey;
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82 EncryptionHelpers::GenerateKey(masterKey);
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83
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84 EncryptionHelpers crypto;
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85 crypto.SetCurrentMasterKey(1, masterKey);
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86
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87 std::string plainTextMessage = "";
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88 std::string encryptedMessage;
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89
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90 crypto.Encrypt(encryptedMessage, plainTextMessage);
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91
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92 std::string decryptedMessage;
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93
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94 crypto.Decrypt(decryptedMessage, encryptedMessage);
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95
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96 ASSERT_EQ(plainTextMessage, decryptedMessage);
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97 }
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98
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99 TEST(EncryptionHelpers, EncryptDecryptTampering)
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100 {
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101 CryptoPP::SecByteBlock masterKey;
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102 EncryptionHelpers::GenerateKey(masterKey);
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103
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104 EncryptionHelpers crypto;
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105 crypto.SetCurrentMasterKey(1, masterKey);
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106
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107 std::string plainTextMessage = "Plain text message";
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108 std::string encryptedMessage;
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109 std::string decryptedMessage;
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110
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111 crypto.Encrypt(encryptedMessage, plainTextMessage);
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112
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113 {
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114 std::string tamperedEncryptedMessage = encryptedMessage;
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115 // change the header
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116 tamperedEncryptedMessage[0] = 'B';
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117 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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118 }
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119
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120 {
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121 std::string tamperedEncryptedMessage = encryptedMessage;
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122 // tamper the masterKeyId:
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123 tamperedEncryptedMessage[EncryptionHelpers::HEADER_VERSION_SIZE + 2] = 0xAF;
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124 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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125 }
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126
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127 {
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128 std::string tamperedEncryptedMessage = encryptedMessage;
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129 // tamper the iv:
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130 tamperedEncryptedMessage[EncryptionHelpers::HEADER_VERSION_SIZE + EncryptionHelpers::MASTER_KEY_ID_SIZE + 2] = 0;
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131 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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132 }
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133
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134 {
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135 std::string tamperedEncryptedMessage = encryptedMessage;
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136 // tamper the encrypted text:
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137 tamperedEncryptedMessage[EncryptionHelpers::HEADER_VERSION_SIZE + EncryptionHelpers::MASTER_KEY_ID_SIZE + EncryptionHelpers::IV_SIZE + 2] = 0;
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138 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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139 }
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140
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141 {
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142 std::string tamperedEncryptedMessage = encryptedMessage;
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143 // tamper the mac:
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144 tamperedEncryptedMessage[tamperedEncryptedMessage.size() - 2] = 0;
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145 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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146 }
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147
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148 {
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149 std::string tamperedEncryptedMessage = encryptedMessage;
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150 // extend the file content
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151 tamperedEncryptedMessage = tamperedEncryptedMessage + "TAMPER";
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152 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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153 }
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154
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155 {
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156 std::string tamperedEncryptedMessage = encryptedMessage;
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157 // reduce the file content
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158 tamperedEncryptedMessage = tamperedEncryptedMessage.substr(0, tamperedEncryptedMessage.size() - 5);
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159 ASSERT_THROW(crypto.Decrypt(decryptedMessage, tamperedEncryptedMessage), EncryptionException);
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160 }
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161 }
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162
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163
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164 TEST(EncryptionHelpers, EncryptDecrypt2TimesSameText)
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165 {
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166 CryptoPP::SecByteBlock masterKey;
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167 EncryptionHelpers::GenerateKey(masterKey);
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168
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169 EncryptionHelpers crypto;
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170 crypto.SetCurrentMasterKey(1, masterKey);
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171
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172 std::string plainTextMessage = "Plain text message";
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173 std::string encryptedMessage1;
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174 std::string encryptedMessage2;
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175
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176 crypto.Encrypt(encryptedMessage1, plainTextMessage);
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177 crypto.Encrypt(encryptedMessage2, plainTextMessage);
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178
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179 ASSERT_NE(encryptedMessage1, encryptedMessage2);
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180
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181 std::string decryptedMessage1;
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182 std::string decryptedMessage2;
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183
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184 crypto.Decrypt(decryptedMessage1, encryptedMessage1);
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185 crypto.Decrypt(decryptedMessage2, encryptedMessage2);
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186
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187 ASSERT_EQ(plainTextMessage, decryptedMessage1);
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188 ASSERT_EQ(plainTextMessage, decryptedMessage2);
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189 }
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190
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191 TEST(EncryptionHelpers, RotateMasterKeys)
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192 {
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193 std::string plainTextMessage = "Plain text message";
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194 std::string encryptedMessage1;
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195 std::string encryptedMessage2;
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196 std::string decryptedMessage;
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197
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198 CryptoPP::SecByteBlock masterKey1;
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199 CryptoPP::SecByteBlock masterKey2;
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200 EncryptionHelpers::GenerateKey(masterKey1);
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201 EncryptionHelpers::GenerateKey(masterKey2);
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202
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203 {
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204 EncryptionHelpers crypto;
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205 crypto.SetCurrentMasterKey(1, masterKey1);
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206 crypto.Encrypt(encryptedMessage1, plainTextMessage);
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207
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208 crypto.SetCurrentMasterKey(2, masterKey2);
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209 crypto.AddPreviousMasterKey(1, masterKey1);
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210
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211 crypto.Encrypt(encryptedMessage2, plainTextMessage);
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212
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213 // ensure that we can decrypt messages encrypted with both master keys
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214 crypto.Decrypt(decryptedMessage, encryptedMessage1);
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215 ASSERT_EQ(plainTextMessage, decryptedMessage);
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216
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217 crypto.Decrypt(decryptedMessage, encryptedMessage2);
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218 ASSERT_EQ(plainTextMessage, decryptedMessage);
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219 }
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220
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221 {
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222 // if we don't know the old key, check we can not decrypt the old message
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223 EncryptionHelpers crypto;
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224 crypto.SetCurrentMasterKey(2, masterKey2);
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225
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226 ASSERT_THROW(crypto.Decrypt(decryptedMessage, encryptedMessage1), EncryptionException);
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227 }
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228 }
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229
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230
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231 void MeasurePerformance(size_t sizeInMB, EncryptionHelpers& crypto)
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232 {
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233 std::string largePlainText(sizeInMB * 1024 * 1024, 'A');
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234 std::string encryptedMessage;
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235 std::string decryptedMessage;
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236
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237 {
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238 auto start = boost::posix_time::microsec_clock::local_time();
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239 crypto.Encrypt(encryptedMessage, largePlainText);
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240
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241 auto end = boost::posix_time::microsec_clock::local_time();
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242 boost::posix_time::time_duration diff = end - start;
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243 std::cout << "encryption of " << sizeInMB << " MB file took " << diff.total_milliseconds() << " ms" << std::endl;
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244 }
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245
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246 {
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247 auto start = boost::posix_time::microsec_clock::local_time();
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248 crypto.Decrypt(decryptedMessage, encryptedMessage);
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249
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250 auto end = boost::posix_time::microsec_clock::local_time();
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251 boost::posix_time::time_duration diff = end - start;
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252 std::cout << "decryption of " << sizeInMB << " MB file took " << diff.total_milliseconds() << " ms" << std::endl;
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253 }
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254
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255 }
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256
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257 TEST(EncryptionHelpers, Performance)
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258 {
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259 CryptoPP::SecByteBlock masterKey;
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260 EncryptionHelpers::GenerateKey(masterKey);
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261
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262 EncryptionHelpers crypto;
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263 crypto.SetCurrentMasterKey(1, masterKey);
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264
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265 MeasurePerformance(1, crypto);
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266 MeasurePerformance(10, crypto);
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267 // MeasurePerformance(100, crypto);
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268 // MeasurePerformance(400, crypto);
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269 }
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