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Commit 775e0c69 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Add SHA384/SHA512 driver making use of the 'sha512' instruction. 



Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 86c93b24

arch/sparc/crypto/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 


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

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

obj-$(CONFIG_CRYPTO_SHA512_SPARC64) += sha512-sparc64.o



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

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

sha512-sparc64-y := sha512_asm.o sha512_glue.o

arch/sparc/crypto/sha512_asm.S

0 → 100644
+102 −0
Original line number Diff line number Diff line 
#include <linux/linkage.h>

#include <asm/visasm.h>



ENTRY(sha512_sparc64_transform)

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

	VISEntry

	ldd	[%o0 + 0x00], %f0

	ldd	[%o0 + 0x08], %f2

	ldd	[%o0 + 0x10], %f4

	ldd	[%o0 + 0x18], %f6

	ldd	[%o0 + 0x20], %f8

	ldd	[%o0 + 0x28], %f10

	andcc	%o1, 0x7, %g0

	ldd	[%o0 + 0x30], %f12

	bne,pn	%xcc, 10f

	 ldd	[%o0 + 0x38], %f14



1:

	ldd	[%o1 + 0x00], %f16

	ldd	[%o1 + 0x08], %f18

	ldd	[%o1 + 0x10], %f20

	ldd	[%o1 + 0x18], %f22

	ldd	[%o1 + 0x20], %f24

	ldd	[%o1 + 0x28], %f26

	ldd	[%o1 + 0x30], %f28

	ldd	[%o1 + 0x38], %f30

	ldd	[%o1 + 0x40], %f32

	ldd	[%o1 + 0x48], %f34

	ldd	[%o1 + 0x50], %f36

	ldd	[%o1 + 0x58], %f38

	ldd	[%o1 + 0x60], %f40

	ldd	[%o1 + 0x68], %f42

	ldd	[%o1 + 0x70], %f44

	ldd	[%o1 + 0x78], %f46



	/* sha512 */

	.word	0x81b02860



	subcc	%o2, 1, %o2

	bne,pt	%xcc, 1b

	 add	%o1, 0x80, %o1



5:

	std	%f0, [%o0 + 0x00]

	std	%f2, [%o0 + 0x08]

	std	%f4, [%o0 + 0x10]

	std	%f6, [%o0 + 0x18]

	std	%f8, [%o0 + 0x20]

	std	%f10, [%o0 + 0x28]

	std	%f12, [%o0 + 0x30]

	std	%f14, [%o0 + 0x38]

	retl

	 VISExit

10:

	alignaddr %o1, %g0, %o1



	ldd	[%o1 + 0x00], %f18

1:

	ldd	[%o1 + 0x08], %f20

	ldd	[%o1 + 0x10], %f22

	ldd	[%o1 + 0x18], %f24

	ldd	[%o1 + 0x20], %f26

	ldd	[%o1 + 0x28], %f28

	ldd	[%o1 + 0x30], %f30

	ldd	[%o1 + 0x38], %f32

	ldd	[%o1 + 0x40], %f34

	ldd	[%o1 + 0x48], %f36

	ldd	[%o1 + 0x50], %f38

	ldd	[%o1 + 0x58], %f40

	ldd	[%o1 + 0x60], %f42

	ldd	[%o1 + 0x68], %f44

	ldd	[%o1 + 0x70], %f46

	ldd	[%o1 + 0x78], %f48

	ldd	[%o1 + 0x80], %f50



	faligndata %f18, %f20, %f16

	faligndata %f20, %f22, %f18

	faligndata %f22, %f24, %f20

	faligndata %f24, %f26, %f22

	faligndata %f26, %f28, %f24

	faligndata %f28, %f30, %f26

	faligndata %f30, %f32, %f28

	faligndata %f32, %f34, %f30

	faligndata %f34, %f36, %f32

	faligndata %f36, %f38, %f34

	faligndata %f38, %f40, %f36

	faligndata %f40, %f42, %f38

	faligndata %f42, %f44, %f40

	faligndata %f44, %f46, %f42

	faligndata %f46, %f48, %f44

	faligndata %f48, %f50, %f46



	/* sha512 */

	.word	0x81b02860



	subcc	%o2, 1, %o2

	fsrc1	%f50, %f18

	bne,pt	%xcc, 1b

	 add	%o1, 0x80, %o1



	ba,a,pt	%xcc, 5b

ENDPROC(sha512_sparc64_transform)

arch/sparc/crypto/sha512_glue.c

0 → 100644
+222 −0
Original line number Diff line number Diff line 
/* Glue code for SHA512 hashing optimized for sparc64 crypto opcodes.

 *

 * This is based largely upon crypto/sha512_generic.c

 *

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

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

 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>

 */



#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 sha512_sparc64_transform(u64 *digest, const char *data,

					 unsigned int rounds);



static int sha512_sparc64_init(struct shash_desc *desc)

{

	struct sha512_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA512_H0;

	sctx->state[1] = SHA512_H1;

	sctx->state[2] = SHA512_H2;

	sctx->state[3] = SHA512_H3;

	sctx->state[4] = SHA512_H4;

	sctx->state[5] = SHA512_H5;

	sctx->state[6] = SHA512_H6;

	sctx->state[7] = SHA512_H7;

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



	return 0;

}



static int sha384_sparc64_init(struct shash_desc *desc)

{

	struct sha512_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA384_H0;

	sctx->state[1] = SHA384_H1;

	sctx->state[2] = SHA384_H2;

	sctx->state[3] = SHA384_H3;

	sctx->state[4] = SHA384_H4;

	sctx->state[5] = SHA384_H5;

	sctx->state[6] = SHA384_H6;

	sctx->state[7] = SHA384_H7;

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



	return 0;

}



static void __sha512_sparc64_update(struct sha512_state *sctx, const u8 *data,

				    unsigned int len, unsigned int partial)

{

	unsigned int done = 0;



	if ((sctx->count[0] += len) < len)

		sctx->count[1]++;

	if (partial) {

		done = SHA512_BLOCK_SIZE - partial;

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

		sha512_sparc64_transform(sctx->state, sctx->buf, 1);

	}

	if (len - done >= SHA512_BLOCK_SIZE) {

		const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;



		sha512_sparc64_transform(sctx->state, data + done, rounds);

		done += rounds * SHA512_BLOCK_SIZE;

	}



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

}



static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data,

				 unsigned int len)

{

	struct sha512_state *sctx = shash_desc_ctx(desc);

	unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;



	/* Handle the fast case right here */

	if (partial + len < SHA512_BLOCK_SIZE) {

		if ((sctx->count[0] += len) < len)

			sctx->count[1]++;

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

	} else

		__sha512_sparc64_update(sctx, data, len, partial);



	return 0;

}



static int sha512_sparc64_final(struct shash_desc *desc, u8 *out)

{

	struct sha512_state *sctx = shash_desc_ctx(desc);

	unsigned int i, index, padlen;

	__be64 *dst = (__be64 *)out;

	__be64 bits[2];

	static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };



	/* Save number of bits */

	bits[1] = cpu_to_be64(sctx->count[0] << 3);

	bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);



	/* Pad out to 112 mod 128 and append length */

	index = sctx->count[0] % SHA512_BLOCK_SIZE;

	padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index);



	/* We need to fill a whole block for __sha512_sparc64_update() */

	if (padlen <= 112) {

		if ((sctx->count[0] += padlen) < padlen)

			sctx->count[1]++;

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

	} else {

		__sha512_sparc64_update(sctx, padding, padlen, index);

	}

	__sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112);



	/* Store state in digest */

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

		dst[i] = cpu_to_be64(sctx->state[i]);



	/* Wipe context */

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



	return 0;

}



static int sha384_sparc64_final(struct shash_desc *desc, u8 *hash)

{

	u8 D[64];



	sha512_sparc64_final(desc, D);



	memcpy(hash, D, 48);

	memset(D, 0, 64);



	return 0;

}



static struct shash_alg sha512 = {

	.digestsize	=	SHA512_DIGEST_SIZE,

	.init		=	sha512_sparc64_init,

	.update		=	sha512_sparc64_update,

	.final		=	sha512_sparc64_final,

	.descsize	=	sizeof(struct sha512_state),

	.base		=	{

		.cra_name	=	"sha512",

		.cra_driver_name=	"sha512-sparc64",

		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,

		.cra_blocksize	=	SHA512_BLOCK_SIZE,

		.cra_module	=	THIS_MODULE,

	}

};



static struct shash_alg sha384 = {

	.digestsize	=	SHA384_DIGEST_SIZE,

	.init		=	sha384_sparc64_init,

	.update		=	sha512_sparc64_update,

	.final		=	sha384_sparc64_final,

	.descsize	=	sizeof(struct sha512_state),

	.base		=	{

		.cra_name	=	"sha384",

		.cra_driver_name=	"sha384-sparc64",

		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,

		.cra_blocksize	=	SHA384_BLOCK_SIZE,

		.cra_module	=	THIS_MODULE,

	}

};



static bool __init sparc64_has_sha512_opcode(void)

{

	unsigned long cfr;



	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))

		return false;



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

	if (!(cfr & CFR_SHA512))

		return false;



	return true;

}



static int __init sha512_sparc64_mod_init(void)

{

	if (sparc64_has_sha512_opcode()) {

		int ret = crypto_register_shash(&sha384);

		if (ret < 0)

			return ret;



		ret = crypto_register_shash(&sha512);

		if (ret < 0) {

			crypto_unregister_shash(&sha384);

			return ret;

		}



		pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");

		return 0;

	}

	pr_info("sparc64 sha512 opcode not available.\n");

	return -ENODEV;

}



static void __exit sha512_sparc64_mod_fini(void)

{

	crypto_unregister_shash(&sha384);

	crypto_unregister_shash(&sha512);

}



module_init(sha512_sparc64_mod_init);

module_exit(sha512_sparc64_mod_fini);



MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated");



MODULE_ALIAS("sha384");

MODULE_ALIAS("sha512");

crypto/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -475,6 +475,15 @@ config CRYPTO_SHA512 
	  This code also includes SHA-384, a 384 bit hash with 192 bits

	  of security against collision attacks.



config CRYPTO_SHA512_SPARC64

	tristate "SHA384 and SHA512 digest algorithm (SPARC64)"

	depends on SPARC64

	select CRYPTO_SHA512

	select CRYPTO_HASH

	help

	  SHA-512 secure hash standard (DFIPS 180-2) implemented

	  using sparc64 crypto instructions, when available.



config CRYPTO_TGR192

	tristate "Tiger digest algorithms"

	select CRYPTO_HASH