[deliverable/linux.git] / arch / sparc / crypto / sha512_glue.c

/* 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>

#include "opcodes.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);
	memzero_explicit(D, 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_priority	=	SPARC_CR_OPCODE_PRIORITY,
		.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_priority	=	SPARC_CR_OPCODE_PRIORITY,
		.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_CRYPTO("sha384");
MODULE_ALIAS_CRYPTO("sha512");

#include "crop_devid.c"
Commit	Line	Data
775e0c69 DM	1	/* Glue code for SHA512 hashing optimized for sparc64 crypto opcodes.
	2	*
	3	* This is based largely upon crypto/sha512_generic.c
	4	*
	5	* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
	6	* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
	7	* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
	8	*/
	9
	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	11
	12	#include <crypto/internal/hash.h>
	13	#include <linux/init.h>
	14	#include <linux/module.h>
	15	#include <linux/mm.h>
	16	#include <linux/cryptohash.h>
	17	#include <linux/types.h>
	18	#include <crypto/sha.h>
	19
	20	#include <asm/pstate.h>
	21	#include <asm/elf.h>
	22
10803624 DM	23	#include "opcodes.h"
10803624 DM	24
775e0c69 DM	25	asmlinkage void sha512_sparc64_transform(u64 digest, const char data,
	26	unsigned int rounds);
	27
	28	static int sha512_sparc64_init(struct shash_desc *desc)
	29	{
	30	struct sha512_state *sctx = shash_desc_ctx(desc);
	31	sctx->state[0] = SHA512_H0;
	32	sctx->state[1] = SHA512_H1;
	33	sctx->state[2] = SHA512_H2;
	34	sctx->state[3] = SHA512_H3;
	35	sctx->state[4] = SHA512_H4;
	36	sctx->state[5] = SHA512_H5;
	37	sctx->state[6] = SHA512_H6;
	38	sctx->state[7] = SHA512_H7;
	39	sctx->count[0] = sctx->count[1] = 0;
	40
	41	return 0;
	42	}
	43
	44	static int sha384_sparc64_init(struct shash_desc *desc)
	45	{
	46	struct sha512_state *sctx = shash_desc_ctx(desc);
	47	sctx->state[0] = SHA384_H0;
	48	sctx->state[1] = SHA384_H1;
	49	sctx->state[2] = SHA384_H2;
	50	sctx->state[3] = SHA384_H3;
	51	sctx->state[4] = SHA384_H4;
	52	sctx->state[5] = SHA384_H5;
	53	sctx->state[6] = SHA384_H6;
	54	sctx->state[7] = SHA384_H7;
	55	sctx->count[0] = sctx->count[1] = 0;
	56
	57	return 0;
	58	}
	59
	60	static void __sha512_sparc64_update(struct sha512_state sctx, const u8 data,
	61	unsigned int len, unsigned int partial)
	62	{
	63	unsigned int done = 0;
	64
	65	if ((sctx->count[0] += len) < len)
	66	sctx->count[1]++;
	67	if (partial) {
	68	done = SHA512_BLOCK_SIZE - partial;
	69	memcpy(sctx->buf + partial, data, done);
	70	sha512_sparc64_transform(sctx->state, sctx->buf, 1);
	71	}
	72	if (len - done >= SHA512_BLOCK_SIZE) {
	73	const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
	74
	75	sha512_sparc64_transform(sctx->state, data + done, rounds);
	76	done += rounds * SHA512_BLOCK_SIZE;
	77	}
	78
	79	memcpy(sctx->buf, data + done, len - done);
	80	}
	81
	82	static int sha512_sparc64_update(struct shash_desc desc, const u8 data,
	83	unsigned int len)
	84	{
	85	struct sha512_state *sctx = shash_desc_ctx(desc);
	86	unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
	87
	88	/* Handle the fast case right here */
89	if (partial + len < SHA512_BLOCK_SIZE) {
90	if ((sctx->count[0] += len) < len)
91	sctx->count[1]++;
92	memcpy(sctx->buf + partial, data, len);
93	} else
94	__sha512_sparc64_update(sctx, data, len, partial);
95
96	return 0;
97	}
98
99	static int sha512_sparc64_final(struct shash_desc desc, u8 out)
100	{
101	struct sha512_state *sctx = shash_desc_ctx(desc);
102	unsigned int i, index, padlen;
103	__be64 dst = (__be64 )out;
104	__be64 bits[2];
105	static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
106
107	/* Save number of bits */
108	bits[1] = cpu_to_be64(sctx->count[0] << 3);
109	bits[0] = cpu_to_be64(sctx->count[1] << 3 \| sctx->count[0] >> 61);
110
111	/* Pad out to 112 mod 128 and append length */
112	index = sctx->count[0] % SHA512_BLOCK_SIZE;
113	padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index);
114
115	/* We need to fill a whole block for __sha512_sparc64_update() */
116	if (padlen <= 112) {
117	if ((sctx->count[0] += padlen) < padlen)
118	sctx->count[1]++;
119	memcpy(sctx->buf + index, padding, padlen);
120	} else {
121	__sha512_sparc64_update(sctx, padding, padlen, index);
122	}
123	__sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112);
124
125	/* Store state in digest */
126	for (i = 0; i < 8; i++)
127	dst[i] = cpu_to_be64(sctx->state[i]);
128
129	/* Wipe context */
130	memset(sctx, 0, sizeof(*sctx));
131
132	return 0;
133	}
134
135	static int sha384_sparc64_final(struct shash_desc desc, u8 hash)
136	{
137	u8 D[64];
138
139	sha512_sparc64_final(desc, D);
140
141	memcpy(hash, D, 48);
8202cd72	142	memzero_explicit(D, 64);
775e0c69 DM	143
	144	return 0;
	145	}
	146
	147	static struct shash_alg sha512 = {
	148	.digestsize = SHA512_DIGEST_SIZE,
	149	.init = sha512_sparc64_init,
	150	.update = sha512_sparc64_update,
	151	.final = sha512_sparc64_final,
	152	.descsize = sizeof(struct sha512_state),
	153	.base = {
	154	.cra_name = "sha512",
	155	.cra_driver_name= "sha512-sparc64",
10803624	156	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
775e0c69 DM	157	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	158	.cra_blocksize = SHA512_BLOCK_SIZE,
	159	.cra_module = THIS_MODULE,
	160	}
	161	};
	162
	163	static struct shash_alg sha384 = {
	164	.digestsize = SHA384_DIGEST_SIZE,
	165	.init = sha384_sparc64_init,
	166	.update = sha512_sparc64_update,
	167	.final = sha384_sparc64_final,
	168	.descsize = sizeof(struct sha512_state),
	169	.base = {
	170	.cra_name = "sha384",
	171	.cra_driver_name= "sha384-sparc64",
10803624	172	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
775e0c69 DM	173	.cra_flags = CRYPTO_ALG_TYPE_SHASH,
	174	.cra_blocksize = SHA384_BLOCK_SIZE,
	175	.cra_module = THIS_MODULE,
	176	}
	177	};
	178
	179	static bool __init sparc64_has_sha512_opcode(void)
	180	{
	181	unsigned long cfr;
	182
	183	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
	184	return false;
	185
	186	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
	187	if (!(cfr & CFR_SHA512))
	188	return false;
	189
	190	return true;
	191	}
	192
	193	static int __init sha512_sparc64_mod_init(void)
	194	{
	195	if (sparc64_has_sha512_opcode()) {
	196	int ret = crypto_register_shash(&sha384);
	197	if (ret < 0)
	198	return ret;
	199
	200	ret = crypto_register_shash(&sha512);
	201	if (ret < 0) {
	202	crypto_unregister_shash(&sha384);
	203	return ret;
	204	}
	205
	206	pr_info("Using sparc64 sha512 opcode optimized SHA-512/SHA-384 implementation\n");
	207	return 0;
	208	}
	209	pr_info("sparc64 sha512 opcode not available.\n");
	210	return -ENODEV;
	211	}
	212
	213	static void __exit sha512_sparc64_mod_fini(void)
	214	{
	215	crypto_unregister_shash(&sha384);
	216	crypto_unregister_shash(&sha512);
	217	}
	218
	219	module_init(sha512_sparc64_mod_init);
	220	module_exit(sha512_sparc64_mod_fini);
	221
	222	MODULE_LICENSE("GPL");
	223	MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure Hash Algorithm, sparc64 sha512 opcode accelerated");
	224
5d26a105 KC	225	MODULE_ALIAS_CRYPTO("sha384");
5d26a105 KC	226	MODULE_ALIAS_CRYPTO("sha512");
226f7cea DM	227
226f7cea DM	228	#include "crop_devid.c"