[mirror_ubuntu-artful-kernel.git] / drivers / crypto / padlock-sha.c

/*
 * Cryptographic API.
 *
 * Support for VIA PadLock hardware crypto engine.
 *
 * Copyright (c) 2006  Michal Ludvig <michal@logix.cz>
 *
 * 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 <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
#include <asm/i387.h>
#include "padlock.h"

#ifdef CONFIG_64BIT
#define STACK_ALIGN 16
#else
#define STACK_ALIGN 4
#endif

struct padlock_sha_desc {
	struct shash_desc fallback;
};

struct padlock_sha_ctx {
	struct crypto_shash *fallback;
};

static int padlock_sha_init(struct shash_desc *desc)
{
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);

	dctx->fallback.tfm = ctx->fallback;
	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	return crypto_shash_init(&dctx->fallback);
}

static int padlock_sha_update(struct shash_desc *desc,
			      const u8 *data, unsigned int length)
{
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);

	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	return crypto_shash_update(&dctx->fallback, data, length);
}

static inline void padlock_output_block(uint32_t *src,
		 	uint32_t *dst, size_t count)
{
	while (count--)
		*dst++ = swab32(*src++);
}

static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in,
			      unsigned int count, u8 *out)
{
	/* We can't store directly to *out as it may be unaligned. */
	/* BTW Don't reduce the buffer size below 128 Bytes!
	 *     PadLock microcode needs it that big. */
	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
		((aligned(STACK_ALIGN)));
	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct sha1_state state;
	unsigned int space;
	unsigned int leftover;
	int ts_state;
	int err;

	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	err = crypto_shash_export(&dctx->fallback, &state);
	if (err)
		goto out;

	if (state.count + count > ULONG_MAX)
		return crypto_shash_finup(&dctx->fallback, in, count, out);

	leftover = ((state.count - 1) & (SHA1_BLOCK_SIZE - 1)) + 1;
	space =  SHA1_BLOCK_SIZE - leftover;
	if (space) {
		if (count > space) {
			err = crypto_shash_update(&dctx->fallback, in, space) ?:
			      crypto_shash_export(&dctx->fallback, &state);
			if (err)
				goto out;
			count -= space;
			in += space;
		} else {
			memcpy(state.buffer + leftover, in, count);
			in = state.buffer;
			count += leftover;
			state.count &= ~(SHA1_BLOCK_SIZE - 1);
		}
	}

	memcpy(result, &state.state, SHA1_DIGEST_SIZE);

	/* prevent taking the spurious DNA fault with padlock. */
	ts_state = irq_ts_save();
	asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
		      : \
		      : "c"((unsigned long)state.count + count), \
			"a"((unsigned long)state.count), \
			"S"(in), "D"(result));
	irq_ts_restore(ts_state);

	padlock_output_block((uint32_t *)result, (uint32_t *)out, 5);

out:
	return err;
}

static int padlock_sha1_final(struct shash_desc *desc, u8 *out)
{
	u8 buf[4];

	return padlock_sha1_finup(desc, buf, 0, out);
}

static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in,
				unsigned int count, u8 *out)
{
	/* We can't store directly to *out as it may be unaligned. */
	/* BTW Don't reduce the buffer size below 128 Bytes!
	 *     PadLock microcode needs it that big. */
	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
		((aligned(STACK_ALIGN)));
	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	struct sha256_state state;
	unsigned int space;
	unsigned int leftover;
	int ts_state;
	int err;

	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	err = crypto_shash_export(&dctx->fallback, &state);
	if (err)
		goto out;

	if (state.count + count > ULONG_MAX)
		return crypto_shash_finup(&dctx->fallback, in, count, out);

	leftover = ((state.count - 1) & (SHA256_BLOCK_SIZE - 1)) + 1;
	space =  SHA256_BLOCK_SIZE - leftover;
	if (space) {
		if (count > space) {
			err = crypto_shash_update(&dctx->fallback, in, space) ?:
			      crypto_shash_export(&dctx->fallback, &state);
			if (err)
				goto out;
			count -= space;
			in += space;
		} else {
			memcpy(state.buf + leftover, in, count);
			in = state.buf;
			count += leftover;
			state.count &= ~(SHA1_BLOCK_SIZE - 1);
		}
	}

	memcpy(result, &state.state, SHA256_DIGEST_SIZE);

	/* prevent taking the spurious DNA fault with padlock. */
	ts_state = irq_ts_save();
	asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
		      : \
		      : "c"((unsigned long)state.count + count), \
			"a"((unsigned long)state.count), \
			"S"(in), "D"(result));
	irq_ts_restore(ts_state);

	padlock_output_block((uint32_t *)result, (uint32_t *)out, 8);

out:
	return err;
}

static int padlock_sha256_final(struct shash_desc *desc, u8 *out)
{
	u8 buf[4];

	return padlock_sha256_finup(desc, buf, 0, out);
}

static int padlock_cra_init(struct crypto_tfm *tfm)
{
	struct crypto_shash *hash = __crypto_shash_cast(tfm);
	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_shash *fallback_tfm;
	int err = -ENOMEM;

	/* Allocate a fallback and abort if it failed. */
	fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
					  CRYPTO_ALG_NEED_FALLBACK);
	if (IS_ERR(fallback_tfm)) {
		printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
		       fallback_driver_name);
		err = PTR_ERR(fallback_tfm);
		goto out;
	}

	ctx->fallback = fallback_tfm;
	hash->descsize += crypto_shash_descsize(fallback_tfm);
	return 0;

out:
	return err;
}

static void padlock_cra_exit(struct crypto_tfm *tfm)
{
	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);

	crypto_free_shash(ctx->fallback);
}

static struct shash_alg sha1_alg = {
	.digestsize	=	SHA1_DIGEST_SIZE,
	.init   	= 	padlock_sha_init,
	.update 	=	padlock_sha_update,
	.finup  	=	padlock_sha1_finup,
	.final  	=	padlock_sha1_final,
	.descsize	=	sizeof(struct padlock_sha_desc),
	.base		=	{
		.cra_name		=	"sha1",
		.cra_driver_name	=	"sha1-padlock",
		.cra_priority		=	PADLOCK_CRA_PRIORITY,
		.cra_flags		=	CRYPTO_ALG_TYPE_SHASH |
						CRYPTO_ALG_NEED_FALLBACK,
		.cra_blocksize		=	SHA1_BLOCK_SIZE,
		.cra_ctxsize		=	sizeof(struct padlock_sha_ctx),
		.cra_module		=	THIS_MODULE,
		.cra_init		=	padlock_cra_init,
		.cra_exit		=	padlock_cra_exit,
	}
};

static struct shash_alg sha256_alg = {
	.digestsize	=	SHA256_DIGEST_SIZE,
	.init   	= 	padlock_sha_init,
	.update 	=	padlock_sha_update,
	.finup  	=	padlock_sha256_finup,
	.final  	=	padlock_sha256_final,
	.descsize	=	sizeof(struct padlock_sha_desc),
	.base		=	{
		.cra_name		=	"sha256",
		.cra_driver_name	=	"sha256-padlock",
		.cra_priority		=	PADLOCK_CRA_PRIORITY,
		.cra_flags		=	CRYPTO_ALG_TYPE_SHASH |
						CRYPTO_ALG_NEED_FALLBACK,
		.cra_blocksize		=	SHA256_BLOCK_SIZE,
		.cra_ctxsize		=	sizeof(struct padlock_sha_ctx),
		.cra_module		=	THIS_MODULE,
		.cra_init		=	padlock_cra_init,
		.cra_exit		=	padlock_cra_exit,
	}
};

static int __init padlock_init(void)
{
	int rc = -ENODEV;

	if (!cpu_has_phe) {
		printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
		return -ENODEV;
	}

	if (!cpu_has_phe_enabled) {
		printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
		return -ENODEV;
	}

	rc = crypto_register_shash(&sha1_alg);
	if (rc)
		goto out;

	rc = crypto_register_shash(&sha256_alg);
	if (rc)
		goto out_unreg1;

	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");

	return 0;

out_unreg1:
	crypto_unregister_shash(&sha1_alg);
out:
	printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
	return rc;
}

static void __exit padlock_fini(void)
{
	crypto_unregister_shash(&sha1_alg);
	crypto_unregister_shash(&sha256_alg);
}

module_init(padlock_init);
module_exit(padlock_fini);

MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michal Ludvig");

MODULE_ALIAS("sha1-all");
MODULE_ALIAS("sha256-all");
MODULE_ALIAS("sha1-padlock");
MODULE_ALIAS("sha256-padlock");
Commit	Line	Data
6c833275 ML	1	/*
	2	* Cryptographic API.
	3	*
	4	* Support for VIA PadLock hardware crypto engine.
	5	*
	6	* Copyright (c) 2006 Michal Ludvig <michal@logix.cz>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	*/
	14
7d024608	15	#include <crypto/internal/hash.h>
5265eeb2	16	#include <crypto/sha.h>
6010439f	17	#include <linux/err.h>
6c833275 ML	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/errno.h>
6c833275 ML	21	#include <linux/interrupt.h>
	22	#include <linux/kernel.h>
	23	#include <linux/scatterlist.h>
e4914012	24	#include <asm/i387.h>
6c833275 ML	25	#include "padlock.h"
6c833275 ML	26
4c6ab3ee HX	27	#ifdef CONFIG_64BIT
	28	#define STACK_ALIGN 16
	29	#else
	30	#define STACK_ALIGN 4
	31	#endif
	32
bbbee467 HX	33	struct padlock_sha_desc {
bbbee467 HX	34	struct shash_desc fallback;
6c833275 ML	35	};
6c833275 ML	36
bbbee467 HX	37	struct padlock_sha_ctx {
	38	struct crypto_shash *fallback;
	39	};
6c833275	40
bbbee467	41	static int padlock_sha_init(struct shash_desc *desc)
6c833275	42	{
bbbee467 HX	43	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
bbbee467 HX	44	struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);
6c833275	45
bbbee467 HX	46	dctx->fallback.tfm = ctx->fallback;
	47	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	48	return crypto_shash_init(&dctx->fallback);
6c833275 ML	49	}
6c833275 ML	50
bbbee467 HX	51	static int padlock_sha_update(struct shash_desc *desc,
bbbee467 HX	52	const u8 *data, unsigned int length)
6c833275	53	{
bbbee467	54	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
6c833275	55
bbbee467 HX	56	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
bbbee467 HX	57	return crypto_shash_update(&dctx->fallback, data, length);
6c833275 ML	58	}
	59
	60	static inline void padlock_output_block(uint32_t *src,
	61	uint32_t *dst, size_t count)
	62	{
	63	while (count--)
	64	dst++ = swab32(src++);
	65	}
	66
bbbee467 HX	67	static int padlock_sha1_finup(struct shash_desc desc, const u8 in,
bbbee467 HX	68	unsigned int count, u8 *out)
6c833275 ML	69	{
	70	/* We can't store directly to out as it may be unaligned. /
	71	/* BTW Don't reduce the buffer size below 128 Bytes!
	72	* PadLock microcode needs it that big. */
4c6ab3ee HX	73	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
	74	((aligned(STACK_ALIGN)));
	75	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
bbbee467 HX	76	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	77	struct sha1_state state;
	78	unsigned int space;
	79	unsigned int leftover;
e4914012	80	int ts_state;
bbbee467 HX	81	int err;
	82
	83	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	84	err = crypto_shash_export(&dctx->fallback, &state);
	85	if (err)
	86	goto out;
	87
	88	if (state.count + count > ULONG_MAX)
	89	return crypto_shash_finup(&dctx->fallback, in, count, out);
	90
	91	leftover = ((state.count - 1) & (SHA1_BLOCK_SIZE - 1)) + 1;
	92	space = SHA1_BLOCK_SIZE - leftover;
	93	if (space) {
	94	if (count > space) {
	95	err = crypto_shash_update(&dctx->fallback, in, space) ?:
	96	crypto_shash_export(&dctx->fallback, &state);
	97	if (err)
	98	goto out;
	99	count -= space;
	100	in += space;
	101	} else {
	102	memcpy(state.buffer + leftover, in, count);
	103	in = state.buffer;
	104	count += leftover;
e9b25f16	105	state.count &= ~(SHA1_BLOCK_SIZE - 1);
bbbee467 HX	106	}
	107	}
	108
	109	memcpy(result, &state.state, SHA1_DIGEST_SIZE);
6c833275	110
e4914012 SS	111	/* prevent taking the spurious DNA fault with padlock. */
e4914012 SS	112	ts_state = irq_ts_save();
6c833275	113	asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
bbbee467	114	: \
faae8908 HX	115	: "c"((unsigned long)state.count + count), \
faae8908 HX	116	"a"((unsigned long)state.count), \
bbbee467	117	"S"(in), "D"(result));
e4914012	118	irq_ts_restore(ts_state);
6c833275 ML	119
6c833275 ML	120	padlock_output_block((uint32_t )result, (uint32_t )out, 5);
bbbee467 HX	121
	122	out:
	123	return err;
6c833275 ML	124	}
6c833275 ML	125
bbbee467 HX	126	static int padlock_sha1_final(struct shash_desc desc, u8 out)
	127	{
	128	u8 buf[4];
	129
	130	return padlock_sha1_finup(desc, buf, 0, out);
	131	}
	132
	133	static int padlock_sha256_finup(struct shash_desc desc, const u8 in,
	134	unsigned int count, u8 *out)
6c833275 ML	135	{
	136	/* We can't store directly to out as it may be unaligned. /
	137	/* BTW Don't reduce the buffer size below 128 Bytes!
	138	* PadLock microcode needs it that big. */
4c6ab3ee HX	139	char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
	140	((aligned(STACK_ALIGN)));
	141	char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
bbbee467 HX	142	struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
	143	struct sha256_state state;
	144	unsigned int space;
	145	unsigned int leftover;
e4914012	146	int ts_state;
bbbee467	147	int err;
6c833275	148
bbbee467 HX	149	dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
	150	err = crypto_shash_export(&dctx->fallback, &state);
	151	if (err)
	152	goto out;
	153
	154	if (state.count + count > ULONG_MAX)
	155	return crypto_shash_finup(&dctx->fallback, in, count, out);
	156
	157	leftover = ((state.count - 1) & (SHA256_BLOCK_SIZE - 1)) + 1;
	158	space = SHA256_BLOCK_SIZE - leftover;
	159	if (space) {
	160	if (count > space) {
	161	err = crypto_shash_update(&dctx->fallback, in, space) ?:
	162	crypto_shash_export(&dctx->fallback, &state);
	163	if (err)
	164	goto out;
	165	count -= space;
	166	in += space;
	167	} else {
	168	memcpy(state.buf + leftover, in, count);
	169	in = state.buf;
	170	count += leftover;
e9b25f16	171	state.count &= ~(SHA1_BLOCK_SIZE - 1);
bbbee467 HX	172	}
	173	}
	174
	175	memcpy(result, &state.state, SHA256_DIGEST_SIZE);
6c833275	176
e4914012 SS	177	/* prevent taking the spurious DNA fault with padlock. */
e4914012 SS	178	ts_state = irq_ts_save();
6c833275	179	asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
bbbee467	180	: \
faae8908 HX	181	: "c"((unsigned long)state.count + count), \
faae8908 HX	182	"a"((unsigned long)state.count), \
bbbee467	183	"S"(in), "D"(result));
e4914012	184	irq_ts_restore(ts_state);
6c833275 ML	185
6c833275 ML	186	padlock_output_block((uint32_t )result, (uint32_t )out, 8);
bbbee467 HX	187
	188	out:
	189	return err;
6c833275 ML	190	}
6c833275 ML	191
bbbee467	192	static int padlock_sha256_final(struct shash_desc desc, u8 out)
6c833275	193	{
bbbee467	194	u8 buf[4];
6c833275	195
bbbee467	196	return padlock_sha256_finup(desc, buf, 0, out);
6c833275 ML	197	}
6c833275 ML	198
6010439f	199	static int padlock_cra_init(struct crypto_tfm *tfm)
6c833275	200	{
bbbee467	201	struct crypto_shash *hash = __crypto_shash_cast(tfm);
6010439f	202	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
bbbee467	203	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
7d024608 HX	204	struct crypto_shash *fallback_tfm;
7d024608 HX	205	int err = -ENOMEM;
6010439f	206
6c833275	207	/* Allocate a fallback and abort if it failed. */
7d024608 HX	208	fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0,
7d024608 HX	209	CRYPTO_ALG_NEED_FALLBACK);
6010439f	210	if (IS_ERR(fallback_tfm)) {
6c833275 ML	211	printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
6c833275 ML	212	fallback_driver_name);
7d024608	213	err = PTR_ERR(fallback_tfm);
bbbee467	214	goto out;
6c833275 ML	215	}
6c833275 ML	216
bbbee467 HX	217	ctx->fallback = fallback_tfm;
bbbee467 HX	218	hash->descsize += crypto_shash_descsize(fallback_tfm);
6c833275	219	return 0;
7d024608	220
7d024608 HX	221	out:
7d024608 HX	222	return err;
6c833275 ML	223	}
6c833275 ML	224
6c833275 ML	225	static void padlock_cra_exit(struct crypto_tfm *tfm)
6c833275 ML	226	{
bbbee467	227	struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
7d024608	228
bbbee467	229	crypto_free_shash(ctx->fallback);
6c833275 ML	230	}
6c833275 ML	231
bbbee467 HX	232	static struct shash_alg sha1_alg = {
	233	.digestsize = SHA1_DIGEST_SIZE,
	234	.init = padlock_sha_init,
	235	.update = padlock_sha_update,
	236	.finup = padlock_sha1_finup,
	237	.final = padlock_sha1_final,
	238	.descsize = sizeof(struct padlock_sha_desc),
	239	.base = {
	240	.cra_name = "sha1",
	241	.cra_driver_name = "sha1-padlock",
	242	.cra_priority = PADLOCK_CRA_PRIORITY,
	243	.cra_flags = CRYPTO_ALG_TYPE_SHASH \|
	244	CRYPTO_ALG_NEED_FALLBACK,
	245	.cra_blocksize = SHA1_BLOCK_SIZE,
	246	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	247	.cra_module = THIS_MODULE,
	248	.cra_init = padlock_cra_init,
	249	.cra_exit = padlock_cra_exit,
6c833275 ML	250	}
	251	};
	252
bbbee467 HX	253	static struct shash_alg sha256_alg = {
	254	.digestsize = SHA256_DIGEST_SIZE,
	255	.init = padlock_sha_init,
	256	.update = padlock_sha_update,
	257	.finup = padlock_sha256_finup,
	258	.final = padlock_sha256_final,
	259	.descsize = sizeof(struct padlock_sha_desc),
	260	.base = {
	261	.cra_name = "sha256",
	262	.cra_driver_name = "sha256-padlock",
	263	.cra_priority = PADLOCK_CRA_PRIORITY,
	264	.cra_flags = CRYPTO_ALG_TYPE_SHASH \|
	265	CRYPTO_ALG_NEED_FALLBACK,
	266	.cra_blocksize = SHA256_BLOCK_SIZE,
	267	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	268	.cra_module = THIS_MODULE,
	269	.cra_init = padlock_cra_init,
	270	.cra_exit = padlock_cra_exit,
6c833275 ML	271	}
	272	};
	273
6c833275 ML	274	static int __init padlock_init(void)
	275	{
	276	int rc = -ENODEV;
	277
	278	if (!cpu_has_phe) {
b43e726b	279	printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
6c833275 ML	280	return -ENODEV;
	281	}
	282
	283	if (!cpu_has_phe_enabled) {
b43e726b	284	printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
6c833275 ML	285	return -ENODEV;
	286	}
	287
bbbee467	288	rc = crypto_register_shash(&sha1_alg);
6c833275 ML	289	if (rc)
	290	goto out;
	291
bbbee467	292	rc = crypto_register_shash(&sha256_alg);
6c833275 ML	293	if (rc)
	294	goto out_unreg1;
	295
	296	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");
	297
	298	return 0;
	299
	300	out_unreg1:
bbbee467	301	crypto_unregister_shash(&sha1_alg);
6c833275 ML	302	out:
	303	printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
	304	return rc;
	305	}
	306
	307	static void __exit padlock_fini(void)
	308	{
bbbee467 HX	309	crypto_unregister_shash(&sha1_alg);
bbbee467 HX	310	crypto_unregister_shash(&sha256_alg);
6c833275 ML	311	}
	312
	313	module_init(padlock_init);
	314	module_exit(padlock_fini);
	315
	316	MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
	317	MODULE_LICENSE("GPL");
	318	MODULE_AUTHOR("Michal Ludvig");
	319
a760a665 HX	320	MODULE_ALIAS("sha1-all");
a760a665 HX	321	MODULE_ALIAS("sha256-all");
6c833275 ML	322	MODULE_ALIAS("sha1-padlock");
6c833275 ML	323	MODULE_ALIAS("sha256-padlock");