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Commit bd9d20db authored by Adrian-Ken Rueegsegger's avatar Adrian-Ken Rueegsegger Committed by Herbert Xu
Browse files

crypto: sha512 - Switch to shash 



This patch changes sha512 and sha384 to the new shash interface.

Signed-off-by: default avatarAdrian-Ken Rueegsegger <ken@codelabs.ch>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent f9e2bca6

crypto/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -369,7 +369,7 @@ config CRYPTO_SHA256 


config CRYPTO_SHA512

	tristate "SHA384 and SHA512 digest algorithms"

	select CRYPTO_ALGAPI

	select CRYPTO_HASH

	help

	  SHA512 secure hash standard (DFIPS 180-2).

crypto/sha512_generic.c

+59 −53
Original line number Diff line number Diff line
@@ -10,7 +10,7 @@ 
 * later version.

 *

 */



#include <crypto/internal/hash.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mm.h>
@@ -138,10 +138,10 @@ sha512_transform(u64 *state, const u8 *input) 
	put_cpu_var(msg_schedule);

}



static void

sha512_init(struct crypto_tfm *tfm)

static int

sha512_init(struct shash_desc *desc)

{

	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);

	struct sha512_ctx *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA512_H0;

	sctx->state[1] = SHA512_H1;

	sctx->state[2] = SHA512_H2;
@@ -151,12 +151,14 @@ sha512_init(struct crypto_tfm *tfm) 
	sctx->state[6] = SHA512_H6;

	sctx->state[7] = SHA512_H7;

	sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;



	return 0;

}



static void

sha384_init(struct crypto_tfm *tfm)

static int

sha384_init(struct shash_desc *desc)

{

	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);

	struct sha512_ctx *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA384_H0;

	sctx->state[1] = SHA384_H1;

	sctx->state[2] = SHA384_H2;
@@ -166,12 +168,14 @@ sha384_init(struct crypto_tfm *tfm) 
	sctx->state[6] = SHA384_H6;

	sctx->state[7] = SHA384_H7;

        sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;



	return 0;

}



static void

sha512_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len)

static int

sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)

{

	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);

	struct sha512_ctx *sctx = shash_desc_ctx(desc);



	unsigned int i, index, part_len;
@@ -203,12 +207,14 @@ sha512_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) 


	/* Buffer remaining input */

	memcpy(&sctx->buf[index], &data[i], len - i);



	return 0;

}



static void

sha512_final(struct crypto_tfm *tfm, u8 *hash)

static int

sha512_final(struct shash_desc *desc, u8 *hash)

{

	struct sha512_ctx *sctx = crypto_tfm_ctx(tfm);

	struct sha512_ctx *sctx = shash_desc_ctx(desc);

        static u8 padding[128] = { 0x80, };

	__be64 *dst = (__be64 *)hash;

	__be32 bits[4];
@@ -224,10 +230,10 @@ sha512_final(struct crypto_tfm *tfm, u8 *hash) 
	/* Pad out to 112 mod 128. */

	index = (sctx->count[0] >> 3) & 0x7f;

	pad_len = (index < 112) ? (112 - index) : ((128+112) - index);

	sha512_update(tfm, padding, pad_len);

	sha512_update(desc, padding, pad_len);



	/* Append length (before padding) */

	sha512_update(tfm, (const u8 *)bits, sizeof(bits));

	sha512_update(desc, (const u8 *)bits, sizeof(bits));



	/* Store state in digest */

	for (i = 0; i < 8; i++)
@@ -235,47 +241,47 @@ sha512_final(struct crypto_tfm *tfm, u8 *hash) 


	/* Zeroize sensitive information. */

	memset(sctx, 0, sizeof(struct sha512_ctx));



	return 0;

}



static void sha384_final(struct crypto_tfm *tfm, u8 *hash)

static int sha384_final(struct shash_desc *desc, u8 *hash)

{

	u8 D[64];



	sha512_final(tfm, D);

	sha512_final(desc, D);



	memcpy(hash, D, 48);

	memset(D, 0, 64);



	return 0;

}



static struct crypto_alg sha512 = {

static struct shash_alg sha512 = {

	.digestsize	=	SHA512_DIGEST_SIZE,

	.init		=	sha512_init,

	.update		=	sha512_update,

	.final		=	sha512_final,

	.descsize	=	sizeof(struct sha512_ctx),

	.base		=	{

		.cra_name	=	"sha512",

        .cra_flags      = CRYPTO_ALG_TYPE_DIGEST,

		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,

		.cra_blocksize	=	SHA512_BLOCK_SIZE,

        .cra_ctxsize    = sizeof(struct sha512_ctx),

		.cra_module	=	THIS_MODULE,

	.cra_alignmask	= 3,

        .cra_list       = LIST_HEAD_INIT(sha512.cra_list),

        .cra_u          = { .digest = {

                                .dia_digestsize = SHA512_DIGEST_SIZE,

                                .dia_init       = sha512_init,

                                .dia_update     = sha512_update,

                                .dia_final      = sha512_final }

	}

};



static struct crypto_alg sha384 = {

static struct shash_alg sha384 = {

	.digestsize	=	SHA384_DIGEST_SIZE,

	.init		=	sha384_init,

	.update		=	sha512_update,

	.final		=	sha384_final,

	.descsize	=	sizeof(struct sha512_ctx),

	.base		=	{

		.cra_name	=	"sha384",

        .cra_flags      = CRYPTO_ALG_TYPE_DIGEST,

		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,

		.cra_blocksize	=	SHA384_BLOCK_SIZE,

        .cra_ctxsize    = sizeof(struct sha512_ctx),

	.cra_alignmask	= 3,

		.cra_module	=	THIS_MODULE,

        .cra_list       = LIST_HEAD_INIT(sha384.cra_list),

        .cra_u          = { .digest = {

                                .dia_digestsize = SHA384_DIGEST_SIZE,

                                .dia_init       = sha384_init,

                                .dia_update     = sha512_update,

                                .dia_final      = sha384_final }

	}

};
@@ -283,18 +289,18 @@ static int __init sha512_generic_mod_init(void) 
{

        int ret = 0;



        if ((ret = crypto_register_alg(&sha384)) < 0)

        if ((ret = crypto_register_shash(&sha384)) < 0)

                goto out;

        if ((ret = crypto_register_alg(&sha512)) < 0)

                crypto_unregister_alg(&sha384);

        if ((ret = crypto_register_shash(&sha512)) < 0)

                crypto_unregister_shash(&sha384);

out:

        return ret;

}



static void __exit sha512_generic_mod_fini(void)

{

        crypto_unregister_alg(&sha384);

        crypto_unregister_alg(&sha512);

        crypto_unregister_shash(&sha384);

        crypto_unregister_shash(&sha512);

}



module_init(sha512_generic_mod_init);