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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| // Concord | ||
| // | ||
| // Copyright (c) 2022 VMware, Inc. All Rights Reserved. | ||
| // | ||
| // This product is licensed to you under the Apache 2.0 license (the "License"). You may not use this product except in | ||
| // compliance with the Apache 2.0 License. | ||
| // | ||
| // This product may include a number of subcomponents with separate copyright notices and license terms. Your use of | ||
| // these subcomponents is subject to the terms and conditions of the subcomponent's license, as noted in the LICENSE | ||
| // file. | ||
|
|
||
| #pragma once | ||
|
|
||
| #include <type_traits> | ||
| #include <openssl/evp.h> | ||
| #include <cstdint> | ||
| #include <memory> | ||
|
|
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| #include "sha_hash.hpp" | ||
| #include "DigestType.hpp" | ||
| #include "hex_tools.h" | ||
|
|
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| namespace concord::util::digest { | ||
|
|
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| class DigestUtil { | ||
| public: | ||
| static size_t digestLength(); | ||
| static bool compute(const char* input, size_t inputLength, char* outBufferForDigest, size_t lengthOfBufferForDigest); | ||
|
|
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| class Context { | ||
| public: | ||
| Context(); | ||
| void update(const char* data, size_t len); | ||
| void writeDigest(char* outDigest); // write digest to outDigest, and invalidate the Context object | ||
| ~Context(); | ||
|
|
||
| private: | ||
| void* internalState; | ||
| }; | ||
| }; | ||
|
|
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| class DigestCreator { | ||
| public: | ||
| virtual ~DigestCreator() = default; | ||
|
|
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| virtual void init() = 0; | ||
| virtual void compute() = 0; | ||
| virtual void update() = 0; | ||
| virtual void final() = 0; | ||
| }; | ||
|
|
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| template <typename CREATOR, typename = std::enable_if_t<std::is_base_of_v<DigestCreator, CREATOR>>> | ||
| class DigestHolder { | ||
| public: | ||
| DigestHolder() { std::memset(d, 0, DIGEST_SIZE); } | ||
| DigestHolder(unsigned char initVal) { std::memset(d, initVal, DIGEST_SIZE); } | ||
| DigestHolder(const char* other) { std::memcpy(d, other, DIGEST_SIZE); } | ||
| DigestHolder(char* buf, size_t len) { DigestUtil::compute(buf, len, (char*)d, DIGEST_SIZE); } | ||
| DigestHolder(const DigestHolder& other) { std::memcpy(d, other.d, DIGEST_SIZE); } | ||
|
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| char* content() const { return (char*)d; } // Can be replaced by getForUpdate(). | ||
| void makeZero() { std::memset(d, 0, DIGEST_SIZE); } | ||
| std::string toString() const { return concordUtils::bufferToHex(d, DIGEST_SIZE, false); } | ||
| void print() { printf("digest=[%s]", toString().c_str()); } | ||
| const char* const get() const { return d; } | ||
| char* getForUpdate() { return d; } | ||
|
|
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| bool isZero() const { | ||
| for (int i = 0; i < DIGEST_SIZE; ++i) { | ||
| if (d[i] != 0) return false; | ||
| } | ||
| return true; | ||
| } | ||
|
|
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| int hash() const { | ||
| uint64_t* p = (uint64_t*)d; | ||
| int h = (int)p[0]; | ||
| return h; | ||
| } | ||
|
|
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| bool operator==(const DigestHolder& other) const { | ||
| int r = std::memcmp(d, other.d, DIGEST_SIZE); | ||
| return (r == 0); | ||
| } | ||
|
|
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| bool operator!=(const DigestHolder& other) const { | ||
| int r = std::memcmp(d, other.d, DIGEST_SIZE); | ||
| return (r != 0); | ||
| } | ||
|
|
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| DigestHolder& operator=(const DigestHolder& other) { | ||
| if (this == &other) { | ||
| return *this; | ||
| } | ||
| std::memcpy(d, other.d, DIGEST_SIZE); | ||
| return *this; | ||
| } | ||
|
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| static void digestOfDigest(const DigestHolder& inDigest, DigestHolder& outDigest) { | ||
| DigestUtil::compute(inDigest.d, sizeof(DigestHolder), outDigest.d, sizeof(DigestHolder)); | ||
| } | ||
|
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| static void calcCombination(const DigestHolder& inDigest, int64_t inDataA, int64_t inDataB, DigestHolder& outDigest) { | ||
| const size_t X = ((DIGEST_SIZE / sizeof(uint64_t)) / 2); | ||
|
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| std::memcpy(outDigest.d, inDigest.d, DIGEST_SIZE); | ||
|
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| uint64_t* ptr = (uint64_t*)outDigest.d; | ||
| size_t locationA = ptr[0] % X; | ||
| size_t locationB = (ptr[0] >> 8) % X; | ||
| ptr[locationA] = ptr[locationA] ^ (inDataA); | ||
| ptr[locationB] = ptr[locationB] ^ (inDataB); | ||
| } | ||
|
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| private: | ||
| char d[DIGEST_SIZE]; // DIGEST_SIZE should be >= 8 bytes; // Stores digest. | ||
| }; | ||
|
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| // Implements digest using Crypto++ library. | ||
| class CryptoppDigestCreator : public DigestCreator { | ||
| public: | ||
| void init() override {} | ||
| void compute() override {} | ||
| void update() override {} | ||
| void final() override {} | ||
| virtual ~CryptoppDigestCreator() = default; | ||
| }; | ||
|
|
||
| // Implements digest using OpenSSL library. | ||
| template <typename SHACTX, | ||
| typename = std::enable_if_t<std::is_same_v<SHACTX, concord::util::SHA2_256> || | ||
| std::is_same_v<SHACTX, concord::util::SHA3_256>>> | ||
| class OpenSSLDigestCreator : public DigestCreator { | ||
| public: | ||
| virtual ~OpenSSLDigestCreator() = default; | ||
| void init() override {} | ||
| void compute() override {} | ||
| void update() override {} | ||
| void final() override {} | ||
|
|
||
| private: | ||
| SHACTX hash_ctx_; | ||
| }; | ||
| } // namespace concord::util::digest |
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