mirror of
https://github.com/FairRootGroup/FairMQ.git
synced 2025-10-13 00:31:14 +00:00
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/********************************************************************************
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* Copyright (C) 2021 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
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* *
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* This software is distributed under the terms of the *
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* GNU Lesser General Public Licence (LGPL) version 3, *
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* copied verbatim in the file "LICENSE" *
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********************************************************************************/
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#include "Common.h"
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#include <picosha2.h>
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#include <unistd.h>
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#include <sstream>
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#include <string>
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namespace fair::mq::shmem
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{
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std::string makeShmIdStr(const std::string& sessionId, const std::string& userId)
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{
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std::string seed(userId + sessionId);
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// generate a 8-digit hex value out of sha256 hash
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std::vector<unsigned char> hash(4);
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picosha2::hash256(seed.begin(), seed.end(), hash.begin(), hash.end());
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return picosha2::bytes_to_hex_string(hash.begin(), hash.end());
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}
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std::string makeShmIdStr(const std::string& sessionId)
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{
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return makeShmIdStr(sessionId, std::to_string(geteuid()));
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}
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uint64_t makeShmIdUint64(const std::string& sessionId)
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{
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std::string shmId = makeShmIdStr(sessionId);
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uint64_t id = 0;
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std::stringstream ss;
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ss << std::hex << shmId;
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ss >> id;
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return id;
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}
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} // namespace fair::mq::shmem
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