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fcbef05aae
Hmm rpmlint suggest fsf is using a different address these days, so lets keep it up-to-date
45 lines
1018 B
C
45 lines
1018 B
C
/*
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* Copyright (C) 2010 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "lib.h"
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#include "dev-type.h"
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#define LUKS_SIGNATURE "LUKS\xba\xbe"
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#define LUKS_SIGNATURE_SIZE 6
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int dev_is_luks(struct device *dev, uint64_t *offset_found)
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{
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char buf[LUKS_SIGNATURE_SIZE];
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int ret = -1;
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if (!dev_open_readonly(dev)) {
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stack;
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return -1;
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}
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if (offset_found)
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*offset_found = 0;
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if (!dev_read(dev, 0, LUKS_SIGNATURE_SIZE, buf))
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goto_out;
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ret = memcmp(buf, LUKS_SIGNATURE, LUKS_SIGNATURE_SIZE) ? 0 : 1;
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out:
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if (!dev_close(dev))
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stack;
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return ret;
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}
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