/*
 * sha1_base.h - core logic for SHA-1 implementations
 *
 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <linux/crypto.h>
#include <linux/module.h>

#include <asm/unaligned.h>

typedef void (sha1_block_fn)(struct sha1_state *sst, u8 const *src, int blocks);

static inline int sha1_base_init(struct shash_desc *desc)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA1_H0;
	sctx->state[1] = SHA1_H1;
	sctx->state[2] = SHA1_H2;
	sctx->state[3] = SHA1_H3;
	sctx->state[4] = SHA1_H4;
	sctx->count = 0;

	return 0;
}

static inline int sha1_base_do_update(struct shash_desc *desc,
				      const u8 *data,
				      unsigned int len,
				      sha1_block_fn *block_fn)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);
	unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;

	sctx->count += len;

	if (unlikely((partial + len) >= SHA1_BLOCK_SIZE)) {
		int blocks;

		if (partial) {
			int p = SHA1_BLOCK_SIZE - partial;

			memcpy(sctx->buffer + partial, data, p);
			data += p;
			len -= p;

			block_fn(sctx, sctx->buffer, 1);
		}

		blocks = len / SHA1_BLOCK_SIZE;
		len %= SHA1_BLOCK_SIZE;

		if (blocks) {
			block_fn(sctx, data, blocks);
			data += blocks * SHA1_BLOCK_SIZE;
		}
		partial = 0;
	}
	if (len)
		memcpy(sctx->buffer + partial, data, len);

	return 0;
}

static inline int sha1_base_do_finalize(struct shash_desc *desc,
					sha1_block_fn *block_fn)
{
	const int bit_offset = SHA1_BLOCK_SIZE - sizeof(__be64);
	struct sha1_state *sctx = shash_desc_ctx(desc);
	__be64 *bits = (__be64 *)(sctx->buffer + bit_offset);
	unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;

	sctx->buffer[partial++] = 0x80;
	if (partial > bit_offset) {
		memset(sctx->buffer + partial, 0x0, SHA1_BLOCK_SIZE - partial);
		partial = 0;

		block_fn(sctx, sctx->buffer, 1);
	}

	memset(sctx->buffer + partial, 0x0, bit_offset - partial);
	*bits = cpu_to_be64(sctx->count << 3);
	block_fn(sctx, sctx->buffer, 1);

	return 0;
}

static inline int sha1_base_finish(struct shash_desc *desc, u8 *out)
{
	struct sha1_state *sctx = shash_desc_ctx(desc);
	__be32 *digest = (__be32 *)out;
	int i;

	for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++)
		put_unaligned_be32(sctx->state[i], digest++);

	*sctx = (struct sha1_state){};
	return 0;
}
d></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>Documentation</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Dan Williams &lt;dan.j.williams@intel.com&gt;</td><td class='right'>2016-09-03 10:36:00 -0700</td></tr>
<tr><th>committer</th><td>Dan Williams &lt;dan.j.williams@intel.com&gt;</td><td class='right'>2016-09-03 10:40:57 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>4c3cb6e9a9d94d1553807854a565cd27ff4c22aa</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>3080bceb1954d684c570fa96337098f433165f9b</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>Documentation</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=3eab887a55424fc2c27553b7bfe32330df83f7b8'>3eab887a55424fc2c27553b7bfe32330df83f7b8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa&amp;id2=3eab887a55424fc2c27553b7bfe32330df83f7b8'>diff</a>)</td></tr></table>
<div class='commit-subject'>dax: fix mapping size check</div><div class='commit-msg'>pgoff_to_phys() validates that both the starting address and the length
of the mapping against the resource list.  We need to check for a
mapping size of PMD_SIZE not PAGE_SIZE in the pmd fault path.

Signed-off-by: Dan Williams &lt;dan.j.williams@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=4c3cb6e9a9d94d1553807854a565cd27ff4c22aa'>Diffstat</a> (limited to 'Documentation')</div><table summary='diffstat' class='diffstat'>