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Revision bd4c625c061c2a38568d0add3478f59172455159 authored by Linus Torvalds on 13 July 2005, 03:21:28 UTC, committed by Linus Torvalds on 13 July 2005, 03:21:28 UTC 
reiserfs: run scripts/Lindent on reiserfs code
 
This was a pure indentation change, using:

	scripts/Lindent fs/reiserfs/*.c include/linux/reiserfs_*.h

to make reiserfs match the regular Linux indentation style.  As Jeff
Mahoney <jeffm@suse.com> writes:

 The ReiserFS code is a mix of a number of different coding styles, sometimes
 different even from line-to-line. Since the code has been relatively stable
 for quite some time and there are few outstanding patches to be applied, it
 is time to reformat the code to conform to the Linux style standard outlined
 in Documentation/CodingStyle.

 This patch contains the result of running scripts/Lindent against
 fs/reiserfs/*.c and include/linux/reiserfs_*.h. There are places where the
 code can be made to look better, but I'd rather keep those patches separate
 so that there isn't a subtle by-hand hand accident in the middle of a huge
 patch. To be clear: This patch is reformatting *only*.

 A number of patches may follow that continue to make the code more consistent
 with the Linux coding style.

 Hans wasn't particularly enthusiastic about these patches, but said he
 wouldn't really oppose them either.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent 7fa94c8
Raw File
hmac.c 
/*
 * Cryptographic API.
 *
 * HMAC: Keyed-Hashing for Message Authentication (RFC2104).
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 *
 * The HMAC implementation is derived from USAGI.
 * Copyright (c) 2002 Kazunori Miyazawa <miyazawa@linux-ipv6.org> / USAGI
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 */
#include <linux/crypto.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/slab.h>
#include <asm/scatterlist.h>
#include "internal.h"

static void hash_key(struct crypto_tfm *tfm, u8 *key, unsigned int keylen)
{
	struct scatterlist tmp;
	
	tmp.page = virt_to_page(key);
	tmp.offset = offset_in_page(key);
	tmp.length = keylen;
	crypto_digest_digest(tfm, &tmp, 1, key);
		
}

int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
{
	int ret = 0;

	BUG_ON(!crypto_tfm_alg_blocksize(tfm));
	
	tfm->crt_digest.dit_hmac_block = kmalloc(crypto_tfm_alg_blocksize(tfm),
	                                         GFP_KERNEL);
	if (tfm->crt_digest.dit_hmac_block == NULL)
		ret = -ENOMEM;

	return ret;
		
}

void crypto_free_hmac_block(struct crypto_tfm *tfm)
{
	kfree(tfm->crt_digest.dit_hmac_block);
}

void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen)
{
	unsigned int i;
	struct scatterlist tmp;
	char *ipad = tfm->crt_digest.dit_hmac_block;
	
	if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
		hash_key(tfm, key, *keylen);
		*keylen = crypto_tfm_alg_digestsize(tfm);
	}

	memset(ipad, 0, crypto_tfm_alg_blocksize(tfm));
	memcpy(ipad, key, *keylen);

	for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
		ipad[i] ^= 0x36;

	tmp.page = virt_to_page(ipad);
	tmp.offset = offset_in_page(ipad);
	tmp.length = crypto_tfm_alg_blocksize(tfm);
	
	crypto_digest_init(tfm);
	crypto_digest_update(tfm, &tmp, 1);
}

void crypto_hmac_update(struct crypto_tfm *tfm,
                        struct scatterlist *sg, unsigned int nsg)
{
	crypto_digest_update(tfm, sg, nsg);
}

void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
                       unsigned int *keylen, u8 *out)
{
	unsigned int i;
	struct scatterlist tmp;
	char *opad = tfm->crt_digest.dit_hmac_block;
	
	if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
		hash_key(tfm, key, *keylen);
		*keylen = crypto_tfm_alg_digestsize(tfm);
	}

	crypto_digest_final(tfm, out);

	memset(opad, 0, crypto_tfm_alg_blocksize(tfm));
	memcpy(opad, key, *keylen);
		
	for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
		opad[i] ^= 0x5c;

	tmp.page = virt_to_page(opad);
	tmp.offset = offset_in_page(opad);
	tmp.length = crypto_tfm_alg_blocksize(tfm);

	crypto_digest_init(tfm);
	crypto_digest_update(tfm, &tmp, 1);
	
	tmp.page = virt_to_page(out);
	tmp.offset = offset_in_page(out);
	tmp.length = crypto_tfm_alg_digestsize(tfm);
	
	crypto_digest_update(tfm, &tmp, 1);
	crypto_digest_final(tfm, out);
}

void crypto_hmac(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen,
                 struct scatterlist *sg, unsigned int nsg, u8 *out)
{
	crypto_hmac_init(tfm, key, keylen);
	crypto_hmac_update(tfm, sg, nsg);
	crypto_hmac_final(tfm, key, keylen, out);
}

EXPORT_SYMBOL_GPL(crypto_hmac_init);
EXPORT_SYMBOL_GPL(crypto_hmac_update);
EXPORT_SYMBOL_GPL(crypto_hmac_final);
EXPORT_SYMBOL_GPL(crypto_hmac);
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