Mercurial > hg > orthanc-object-storage
annotate Common/EncryptionHelpers.h @ 203:55fab84a0674
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 26 Jun 2024 13:16:28 +0200 |
| parents | 6dd8bb916573 |
| children |
| rev | line source |
|---|---|
| 1 | 1 /** |
| 2 * Cloud storage plugins for Orthanc | |
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3 * Copyright (C) 2020-2023 Osimis S.A., Belgium |
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4 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium |
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5 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 1 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
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20 |
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| 1 | 22 #pragma once |
| 23 | |
| 24 #include <memory.h> | |
| 25 #include <cryptopp/secblock.h> | |
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26 #include <cryptopp/osrng.h> |
| 1 | 27 #include <boost/thread/mutex.hpp> |
| 15 | 28 #include <MultiThreading/Semaphore.h> |
| 1 | 29 |
| 30 class EncryptionException : public std::runtime_error | |
| 31 { | |
| 32 public: | |
| 153 | 33 explicit EncryptionException(const std::string& what) |
| 1 | 34 : std::runtime_error(what) |
| 35 { | |
| 36 } | |
| 37 }; | |
| 38 | |
| 39 class EncryptionHelpers | |
| 40 { | |
| 41 public: | |
| 42 static const size_t HEADER_VERSION_SIZE = 2; | |
| 43 static const size_t MASTER_KEY_ID_SIZE = 4; | |
| 44 static const size_t AES_KEY_SIZE = 32; // length of AES keys (in bytes) | |
| 45 static const size_t IV_SIZE = 32; // length of IVs (in bytes) | |
| 46 static const size_t INTEGRITY_CHECK_TAG_SIZE = 16; // length of the TAG that is used to check the integrity of data (in bytes) | |
| 47 | |
| 48 static const size_t OVERHEAD_SIZE = HEADER_VERSION_SIZE + MASTER_KEY_ID_SIZE + AES_KEY_SIZE + IV_SIZE + INTEGRITY_CHECK_TAG_SIZE; | |
| 49 | |
| 50 | |
| 51 static const std::string HEADER_VERSION; | |
| 52 | |
| 53 private: | |
| 54 Orthanc::Semaphore concurrentInputSizeSemaphore_; | |
| 55 size_t maxConcurrentInputSize_; | |
| 56 | |
| 57 CryptoPP::AutoSeededRandomPool randomGenerator_; | |
| 58 | |
| 59 CryptoPP::SecByteBlock encryptionMasterKey_; // at a given time, there's only one master key that is used for encryption | |
| 60 std::string encryptionMasterKeyId_; | |
| 61 | |
| 62 std::map<std::string, CryptoPP::SecByteBlock> previousMasterKeys_; // for decryption, we might use older master keys too | |
| 63 | |
| 64 public: | |
| 65 | |
| 66 // since the memory used during encryption/decryption can grow up to a bit more than 2 times the input, | |
| 67 // we want to limit the number of threads doing concurrent processing according to the available memory | |
| 68 // instead of the number of concurrent threads | |
| 69 EncryptionHelpers(size_t maxConcurrentInputSize = 1024*1024*1024); | |
| 70 | |
| 71 void SetCurrentMasterKey(uint32_t id, const std::string& path); | |
| 72 | |
| 73 void SetCurrentMasterKey(uint32_t id, const CryptoPP::SecByteBlock& key); | |
| 74 | |
| 75 void AddPreviousMasterKey(uint32_t id, const std::string& path); | |
| 76 | |
| 77 void AddPreviousMasterKey(uint32_t id, const CryptoPP::SecByteBlock& key); | |
| 78 | |
| 79 // input: plain text data | |
| 80 // output: prefix/encrypted data/integrity check tag | |
| 81 void Encrypt(std::string& output, const std::string& input); | |
| 82 void Encrypt(std::string& output, const char* data, size_t size); | |
| 83 | |
| 84 // input: prefix/encrypted data/integrity check tag | |
| 85 // output: plain text data | |
| 86 void Decrypt(std::string& output, const std::string& input); | |
| 87 void Decrypt(char* output, const char* data, size_t size); | |
| 88 | |
| 89 static void GenerateKey(CryptoPP::SecByteBlock& key); | |
| 90 | |
| 91 private: | |
| 92 | |
| 93 void EncryptInternal(std::string& output, const char* data, size_t size, const CryptoPP::SecByteBlock& masterKey); | |
| 94 | |
| 95 void DecryptInternal(char* output, const char* data, size_t size, const CryptoPP::SecByteBlock& masterKey); | |
| 96 | |
| 97 void EncryptPrefixSecBlock(std::string& output, const CryptoPP::SecByteBlock& input, const CryptoPP::SecByteBlock& masterKey); | |
| 98 | |
| 99 void DecryptPrefixSecBlock(CryptoPP::SecByteBlock& output, const std::string& input, const CryptoPP::SecByteBlock& masterKey); | |
| 100 | |
| 101 std::string GetMasterKeyIdentifier(const CryptoPP::SecByteBlock& masterKey); | |
| 102 | |
| 103 const CryptoPP::SecByteBlock& GetMasterKey(const std::string& keyId); | |
| 104 | |
| 105 public: | |
| 106 | |
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parents:
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107 static std::string ToHexString(const void* block, size_t size); |
| 1 | 108 static std::string ToHexString(const std::string& block); |
| 109 static std::string ToHexString(const CryptoPP::SecByteBlock& block); | |
| 110 static std::string ToString(const CryptoPP::SecByteBlock& block); | |
| 111 static std::string ToString(uint32_t value); | |
| 112 | |
| 113 static void ReadKey(CryptoPP::SecByteBlock& key, const std::string& path); | |
| 114 //static void EncryptionHelpers::Encrypt(std::string& output, const std::string& input, const std::string& key, const std::string& iv); | |
| 115 }; | |
| 116 |