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https://github.com/scottlamb/moonfire-nvr.git
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62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
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// This file is part of Moonfire NVR, a security camera network video recorder.
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// Copyright (C) 2016 Scott Lamb <slamb@slamb.org>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// In addition, as a special exception, the copyright holders give
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// permission to link the code of portions of this program with the
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// OpenSSL library under certain conditions as described in each
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// individual source file, and distribute linked combinations including
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// the two.
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//
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// You must obey the GNU General Public License in all respects for all
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// of the code used other than OpenSSL. If you modify file(s) with this
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// exception, you may extend this exception to your version of the
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// file(s), but you are not obligated to do so. If you do not wish to do
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// so, delete this exception statement from your version. If you delete
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// this exception statement from all source files in the program, then
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// also delete it here.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// crypto.cc: see crypto.h.
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#include "crypto.h"
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#include <glog/logging.h>
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namespace moonfire_nvr {
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std::unique_ptr<Digest> Digest::SHA1() {
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std::unique_ptr<Digest> d(new Digest);
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CHECK_EQ(1, EVP_DigestInit_ex(d->ctx_, EVP_sha1(), nullptr));
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return d;
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}
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Digest::Digest() { ctx_ = CHECK_NOTNULL(EVP_MD_CTX_create()); }
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Digest::~Digest() { EVP_MD_CTX_destroy(ctx_); }
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void Digest::Update(re2::StringPiece data) {
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CHECK_EQ(1, EVP_DigestUpdate(ctx_, data.data(), data.size()));
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}
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std::string Digest::Finalize() {
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std::string out;
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out.resize(EVP_MD_CTX_size(ctx_));
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auto *p = reinterpret_cast<unsigned char *>(&out[0]);
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CHECK_EQ(1, EVP_DigestFinal_ex(ctx_, p, nullptr));
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return out;
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}
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} // namespace moonfire_nvr
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