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71 lines
1.8 KiB
71 lines
1.8 KiB
/**
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* \file
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*
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* \author Georg Hopp
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*
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* \copyright
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* Copyright © 2013 Georg Hopp
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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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* 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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// for size_t
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#include <sys/types.h>
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// for md5 generation
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#include <openssl/md5.h>
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// for htonl and similar
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#include <arpa/inet.h>
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// for already available uuid functionality
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#include "class.h"
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#include "uuid.h"
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void _uuidFormat3or5(Uuid uuid, unsigned char hash[16], int version);
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Uuid
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uuidVersion3(const unsigned char * name, size_t nname, Uuid nsid)
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{
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MD5_CTX ctx;
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unsigned char hash[16];
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Uuid net_nsid = clone(nsid);
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Uuid uuid = new(Uuid);
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/*
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* put the namespace id into network byte order.
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*/
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(net_nsid->uuid).elements.time_low =
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htonl((net_nsid->uuid).elements.time_low);
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(net_nsid->uuid).elements.time_mid =
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htons((net_nsid->uuid).elements.time_mid);
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(net_nsid->uuid).elements.time_hi_version =
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htons((net_nsid->uuid).elements.time_hi_version);
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/*
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* generate the MD5
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*/
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MD5_Init(&ctx);
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MD5_Update(&ctx, (net_nsid->uuid).value, 16);
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MD5_Update(&ctx, name, nname);
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MD5_Final(hash, &ctx);
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delete(net_nsid);
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_uuidFormat3or5(uuid, hash, 3);
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return uuid;
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}
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// vim: set ts=4 sw=4:
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