78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/*
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* (C) Copyright 2008-2010 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <digest.h>
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#include <malloc.h>
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#include <errno.h>
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#include <module.h>
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#include <linux/err.h>
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static LIST_HEAD(digests);
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static int dummy_init(struct digest *d)
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{
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return 0;
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}
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int digest_register(struct digest *d)
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{
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if (!d || !d->name || !d->update || !d->final || d->length < 1)
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return -EINVAL;
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if (!d->init)
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d->init = dummy_init;
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if (digest_get_by_name(d->name))
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return -EEXIST;
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list_add_tail(&d->list, &digests);
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return 0;
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}
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EXPORT_SYMBOL(digest_register);
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void digest_unregister(struct digest *d)
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{
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if (!d)
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return;
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list_del(&d->list);
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}
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EXPORT_SYMBOL(digest_unregister);
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struct digest* digest_get_by_name(char* name)
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{
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struct digest* d;
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if (!name)
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return NULL;
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list_for_each_entry(d, &digests, list) {
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if(strcmp(d->name, name) == 0)
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return d;
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(digest_get_by_name);
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