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Commit 86c93b24 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Add SHA224/SHA256 driver making use of the 'sha256' instruction. 



Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 4ff28d4c

arch/sparc/crypto/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -3,5 +3,7 @@ 
#



obj-$(CONFIG_CRYPTO_SHA1_SPARC64) += sha1-sparc64.o

obj-$(CONFIG_CRYPTO_SHA256_SPARC64) += sha256-sparc64.o



sha1-sparc64-y := sha1_asm.o sha1_glue.o

sha256-sparc64-y := sha256_asm.o sha256_glue.o

arch/sparc/crypto/sha256_asm.S

0 → 100644
+78 −0
Original line number Diff line number Diff line 
#include <linux/linkage.h>

#include <asm/visasm.h>



ENTRY(sha256_sparc64_transform)

	/* %o0 = digest, %o1 = data, %o2 = rounds */

	VISEntryHalf

	ld	[%o0 + 0x00], %f0

	ld	[%o0 + 0x04], %f1

	ld	[%o0 + 0x08], %f2

	ld	[%o0 + 0x0c], %f3

	ld	[%o0 + 0x10], %f4

	ld	[%o0 + 0x14], %f5

	andcc	%o1, 0x7, %g0

	ld	[%o0 + 0x18], %f6

	bne,pn	%xcc, 10f

	 ld	[%o0 + 0x1c], %f7



1:

	ldd	[%o1 + 0x00], %f8

	ldd	[%o1 + 0x08], %f10

	ldd	[%o1 + 0x10], %f12

	ldd	[%o1 + 0x18], %f14

	ldd	[%o1 + 0x20], %f16

	ldd	[%o1 + 0x28], %f18

	ldd	[%o1 + 0x30], %f20

	ldd	[%o1 + 0x38], %f22



	/* sha256 */

	.word	0x81b02840



	subcc	%o2, 1, %o2

	bne,pt	%xcc, 1b

	 add	%o1, 0x40, %o1



5:

	st	%f0, [%o0 + 0x00]

	st	%f1, [%o0 + 0x04]

	st	%f2, [%o0 + 0x08]

	st	%f3, [%o0 + 0x0c]

	st	%f4, [%o0 + 0x10]

	st	%f5, [%o0 + 0x14]

	st	%f6, [%o0 + 0x18]

	st	%f7, [%o0 + 0x1c]

	retl

	 VISExitHalf

10:

	alignaddr %o1, %g0, %o1



	ldd	[%o1 + 0x00], %f10

1:

	ldd	[%o1 + 0x08], %f12

	ldd	[%o1 + 0x10], %f14

	ldd	[%o1 + 0x18], %f16

	ldd	[%o1 + 0x20], %f18

	ldd	[%o1 + 0x28], %f20

	ldd	[%o1 + 0x30], %f22

	ldd	[%o1 + 0x38], %f24

	ldd	[%o1 + 0x40], %f26



	faligndata %f10, %f12, %f8

	faligndata %f12, %f14, %f10

	faligndata %f14, %f16, %f12

	faligndata %f16, %f18, %f14

	faligndata %f18, %f20, %f16

	faligndata %f20, %f22, %f18

	faligndata %f22, %f24, %f20

	faligndata %f24, %f26, %f22



	/* sha256 */

	.word	0x81b02840



	subcc	%o2, 1, %o2

	fsrc1	%f26, %f10

	bne,pt	%xcc, 1b

	 add	%o1, 0x40, %o1



	ba,a,pt	%xcc, 5b

ENDPROC(sha256_sparc64_transform)

arch/sparc/crypto/sha256_glue.c

0 → 100644
+237 −0
Original line number Diff line number Diff line 
/* Glue code for SHA256 hashing optimized for sparc64 crypto opcodes.

 *

 * This is based largely upon crypto/sha256_generic.c

 *

 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>

 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>

 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>

 * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>

 */



#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt



#include <crypto/internal/hash.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/mm.h>

#include <linux/cryptohash.h>

#include <linux/types.h>

#include <crypto/sha.h>



#include <asm/pstate.h>

#include <asm/elf.h>



asmlinkage void sha256_sparc64_transform(u32 *digest, const char *data,

					 unsigned int rounds);



static int sha224_sparc64_init(struct shash_desc *desc)

{

	struct sha256_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA224_H0;

	sctx->state[1] = SHA224_H1;

	sctx->state[2] = SHA224_H2;

	sctx->state[3] = SHA224_H3;

	sctx->state[4] = SHA224_H4;

	sctx->state[5] = SHA224_H5;

	sctx->state[6] = SHA224_H6;

	sctx->state[7] = SHA224_H7;

	sctx->count = 0;



	return 0;

}



static int sha256_sparc64_init(struct shash_desc *desc)

{

	struct sha256_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA256_H0;

	sctx->state[1] = SHA256_H1;

	sctx->state[2] = SHA256_H2;

	sctx->state[3] = SHA256_H3;

	sctx->state[4] = SHA256_H4;

	sctx->state[5] = SHA256_H5;

	sctx->state[6] = SHA256_H6;

	sctx->state[7] = SHA256_H7;

	sctx->count = 0;



	return 0;

}



static void __sha256_sparc64_update(struct sha256_state *sctx, const u8 *data,

				    unsigned int len, unsigned int partial)

{

	unsigned int done = 0;



	sctx->count += len;

	if (partial) {

		done = SHA256_BLOCK_SIZE - partial;

		memcpy(sctx->buf + partial, data, done);

		sha256_sparc64_transform(sctx->state, sctx->buf, 1);

	}

	if (len - done >= SHA256_BLOCK_SIZE) {

		const unsigned int rounds = (len - done) / SHA256_BLOCK_SIZE;



		sha256_sparc64_transform(sctx->state, data + done, rounds);

		done += rounds * SHA256_BLOCK_SIZE;

	}



	memcpy(sctx->buf, data + done, len - done);

}



static int sha256_sparc64_update(struct shash_desc *desc, const u8 *data,

				 unsigned int len)

{

	struct sha256_state *sctx = shash_desc_ctx(desc);

	unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;



	/* Handle the fast case right here */

	if (partial + len < SHA256_BLOCK_SIZE) {

		sctx->count += len;

		memcpy(sctx->buf + partial, data, len);

	} else

		__sha256_sparc64_update(sctx, data, len, partial);



	return 0;

}



static int sha256_sparc64_final(struct shash_desc *desc, u8 *out)

{

	struct sha256_state *sctx = shash_desc_ctx(desc);

	unsigned int i, index, padlen;

	__be32 *dst = (__be32 *)out;

	__be64 bits;

	static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, };



	bits = cpu_to_be64(sctx->count << 3);



	/* Pad out to 56 mod 64 and append length */

	index = sctx->count % SHA256_BLOCK_SIZE;

	padlen = (index < 56) ? (56 - index) : ((SHA256_BLOCK_SIZE+56) - index);



	/* We need to fill a whole block for __sha256_sparc64_update() */

	if (padlen <= 56) {

		sctx->count += padlen;

		memcpy(sctx->buf + index, padding, padlen);

	} else {

		__sha256_sparc64_update(sctx, padding, padlen, index);

	}

	__sha256_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);



	/* Store state in digest */

	for (i = 0; i < 8; i++)

		dst[i] = cpu_to_be32(sctx->state[i]);



	/* Wipe context */

	memset(sctx, 0, sizeof(*sctx));



	return 0;

}



static int sha224_sparc64_final(struct shash_desc *desc, u8 *hash)

{

	u8 D[SHA256_DIGEST_SIZE];



	sha256_sparc64_final(desc, D);



	memcpy(hash, D, SHA224_DIGEST_SIZE);

	memset(D, 0, SHA256_DIGEST_SIZE);



	return 0;

}



static int sha256_sparc64_export(struct shash_desc *desc, void *out)

{

	struct sha256_state *sctx = shash_desc_ctx(desc);



	memcpy(out, sctx, sizeof(*sctx));

	return 0;

}



static int sha256_sparc64_import(struct shash_desc *desc, const void *in)

{

	struct sha256_state *sctx = shash_desc_ctx(desc);



	memcpy(sctx, in, sizeof(*sctx));

	return 0;

}



static struct shash_alg sha256 = {

	.digestsize	=	SHA256_DIGEST_SIZE,

	.init		=	sha256_sparc64_init,

	.update		=	sha256_sparc64_update,

	.final		=	sha256_sparc64_final,

	.export		=	sha256_sparc64_export,

	.import		=	sha256_sparc64_import,

	.descsize	=	sizeof(struct sha256_state),

	.statesize	=	sizeof(struct sha256_state),

	.base		=	{

		.cra_name	=	"sha256",

		.cra_driver_name=	"sha256-sparc64",

		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,

		.cra_blocksize	=	SHA256_BLOCK_SIZE,

		.cra_module	=	THIS_MODULE,

	}

};



static struct shash_alg sha224 = {

	.digestsize	=	SHA224_DIGEST_SIZE,

	.init		=	sha224_sparc64_init,

	.update		=	sha256_sparc64_update,

	.final		=	sha224_sparc64_final,

	.descsize	=	sizeof(struct sha256_state),

	.base		=	{

		.cra_name	=	"sha224",

		.cra_driver_name=	"sha224-sparc64",

		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,

		.cra_blocksize	=	SHA224_BLOCK_SIZE,

		.cra_module	=	THIS_MODULE,

	}

};



static bool __init sparc64_has_sha256_opcode(void)

{

	unsigned long cfr;



	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))

		return false;



	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));

	if (!(cfr & CFR_SHA256))

		return false;



	return true;

}



static int __init sha256_sparc64_mod_init(void)

{

	if (sparc64_has_sha256_opcode()) {

		int ret = crypto_register_shash(&sha224);

		if (ret < 0)

			return ret;



		ret = crypto_register_shash(&sha256);

		if (ret < 0) {

			crypto_unregister_shash(&sha224);

			return ret;

		}



		pr_info("Using sparc64 sha256 opcode optimized SHA-256/SHA-224 implementation\n");

		return 0;

	}

	pr_info("sparc64 sha256 opcode not available.\n");

	return -ENODEV;

}



static void __exit sha256_sparc64_mod_fini(void)

{

	crypto_unregister_shash(&sha224);

	crypto_unregister_shash(&sha256);

}



module_init(sha256_sparc64_mod_init);

module_exit(sha256_sparc64_mod_fini);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm, sparc64 sha256 opcode accelerated");



MODULE_ALIAS("sha224");

MODULE_ALIAS("sha256");

crypto/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -454,6 +454,15 @@ config CRYPTO_SHA256 
	  This code also includes SHA-224, a 224 bit hash with 112 bits

	  of security against collision attacks.



config CRYPTO_SHA256_SPARC64

	tristate "SHA224 and SHA256 digest algorithm (SPARC64)"

	depends on SPARC64

	select CRYPTO_SHA256

	select CRYPTO_HASH

	help

	  SHA-256 secure hash standard (DFIPS 180-2) implemented

	  using sparc64 crypto instructions, when available.



config CRYPTO_SHA512

	tristate "SHA384 and SHA512 digest algorithms"

	select CRYPTO_HASH