1 files changed, 318 insertions, 0 deletions
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
new file mode 100644
index 000000000000..a781fd23b607
--- /dev/null
+++ b/drivers/crypto/padlock-sha.c
@@ -0,0 +1,318 @@
+/*
+ * 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/algapi.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/cryptohash.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/scatterlist.h>
+#include "padlock.h"
+#define SHA1_DEFAULT_FALLBACK   "sha1-generic"
+#define SHA1_DIGEST_SIZE        20
+#define SHA1_HMAC_BLOCK_SIZE    64
+#define SHA256_DEFAULT_FALLBACK "sha256-generic"
+#define SHA256_DIGEST_SIZE      32
+#define SHA256_HMAC_BLOCK_SIZE  64
+struct padlock_sha_ctx {
+        char            *data;
+        size_t          used;
+        int             bypass;
+        void (*f_sha_padlock)(const char *in, char *out, int count);
+        struct hash_desc fallback;
+};
+static inline struct padlock_sha_ctx *ctx(struct crypto_tfm *tfm)
+{
+        return crypto_tfm_ctx(tfm);
+}
+/* We'll need aligned address on the stack */
+#define NEAREST_ALIGNED(ptr) \
+        ((void *)ALIGN((size_t)(ptr), PADLOCK_ALIGNMENT))
+static struct crypto_alg sha1_alg, sha256_alg;
+static void padlock_sha_bypass(struct crypto_tfm *tfm)
+{
+        if (ctx(tfm)->bypass)
+                return;
+        crypto_hash_init(&ctx(tfm)->fallback);
+        if (ctx(tfm)->data && ctx(tfm)->used) {
+                struct scatterlist sg;
+                sg_set_buf(&sg, ctx(tfm)->data, ctx(tfm)->used);
+                crypto_hash_update(&ctx(tfm)->fallback, &sg, sg.length);
+        }
+        ctx(tfm)->used = 0;
+        ctx(tfm)->bypass = 1;
+}
+static void padlock_sha_init(struct crypto_tfm *tfm)
+{
+        ctx(tfm)->used = 0;
+        ctx(tfm)->bypass = 0;
+}
+static void padlock_sha_update(struct crypto_tfm *tfm,
+                        const uint8_t *data, unsigned int length)
+{
+        /* Our buffer is always one page. */
+        if (unlikely(!ctx(tfm)->bypass &&
+                     (ctx(tfm)->used + length > PAGE_SIZE)))
+                padlock_sha_bypass(tfm);
+        if (unlikely(ctx(tfm)->bypass)) {
+                struct scatterlist sg;
+                sg_set_buf(&sg, (uint8_t *)data, length);
+                crypto_hash_update(&ctx(tfm)->fallback, &sg, length);
+                return;
+        }
+        memcpy(ctx(tfm)->data + ctx(tfm)->used, data, length);
+        ctx(tfm)->used += length;
+}
+static inline void padlock_output_block(uint32_t *src,
+                        uint32_t *dst, size_t count)
+{
+        while (count--)
+                *dst++ = swab32(*src++);
+}
+static void padlock_do_sha1(const char *in, char *out, int count)
+{
+        /* 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+16];
+        char *result = NEAREST_ALIGNED(buf);
+        ((uint32_t *)result)[0] = 0x67452301;
+        ((uint32_t *)result)[1] = 0xEFCDAB89;
+        ((uint32_t *)result)[2] = 0x98BADCFE;
+        ((uint32_t *)result)[3] = 0x10325476;
+        ((uint32_t *)result)[4] = 0xC3D2E1F0;
+ 
+        asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
+                      : "+S"(in), "+D"(result)
+                      : "c"(count), "a"(0));
+        padlock_output_block((uint32_t *)result, (uint32_t *)out, 5);
+}
+static void padlock_do_sha256(const char *in, char *out, int count)
+{
+        /* 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+16];
+        char *result = NEAREST_ALIGNED(buf);
+        ((uint32_t *)result)[0] = 0x6A09E667;
+        ((uint32_t *)result)[1] = 0xBB67AE85;
+        ((uint32_t *)result)[2] = 0x3C6EF372;
+        ((uint32_t *)result)[3] = 0xA54FF53A;
+        ((uint32_t *)result)[4] = 0x510E527F;
+        ((uint32_t *)result)[5] = 0x9B05688C;
+        ((uint32_t *)result)[6] = 0x1F83D9AB;
+        ((uint32_t *)result)[7] = 0x5BE0CD19;
+        asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
+                      : "+S"(in), "+D"(result)
+                      : "c"(count), "a"(0));
+        padlock_output_block((uint32_t *)result, (uint32_t *)out, 8);
+}
+static void padlock_sha_final(struct crypto_tfm *tfm, uint8_t *out)
+{
+        if (unlikely(ctx(tfm)->bypass)) {
+                crypto_hash_final(&ctx(tfm)->fallback, out);
+                ctx(tfm)->bypass = 0;
+                return;
+        }
+        /* Pass the input buffer to PadLock microcode... */
+        ctx(tfm)->f_sha_padlock(ctx(tfm)->data, out, ctx(tfm)->used);
+        ctx(tfm)->used = 0;
+}
+static int padlock_cra_init(struct crypto_tfm *tfm)
+{
+        const char *fallback_driver_name = tfm->__crt_alg->cra_name;
+        struct crypto_hash *fallback_tfm;
+        /* For now we'll allocate one page. This
+         * could eventually be configurable one day. */
+        ctx(tfm)->data = (char *)__get_free_page(GFP_KERNEL);
+        if (!ctx(tfm)->data)
+                return -ENOMEM;
+        /* Allocate a fallback and abort if it failed. */
+        fallback_tfm = crypto_alloc_hash(fallback_driver_name, 0,
+                                         CRYPTO_ALG_ASYNC |
+                                         CRYPTO_ALG_NEED_FALLBACK);
+        if (IS_ERR(fallback_tfm)) {
+                printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
+                       fallback_driver_name);
+                free_page((unsigned long)(ctx(tfm)->data));
+                return PTR_ERR(fallback_tfm);
+        }
+        ctx(tfm)->fallback.tfm = fallback_tfm;
+        return 0;
+}
+static int padlock_sha1_cra_init(struct crypto_tfm *tfm)
+{
+        ctx(tfm)->f_sha_padlock = padlock_do_sha1;
+        return padlock_cra_init(tfm);
+}
+static int padlock_sha256_cra_init(struct crypto_tfm *tfm)
+{
+        ctx(tfm)->f_sha_padlock = padlock_do_sha256;
+        return padlock_cra_init(tfm);
+}
+static void padlock_cra_exit(struct crypto_tfm *tfm)
+{
+        if (ctx(tfm)->data) {
+                free_page((unsigned long)(ctx(tfm)->data));
+                ctx(tfm)->data = NULL;
+        }
+        crypto_free_hash(ctx(tfm)->fallback.tfm);
+        ctx(tfm)->fallback.tfm = NULL;
+}
+static struct crypto_alg sha1_alg = {
+        .cra_name               =       "sha1",
+        .cra_driver_name        =       "sha1-padlock",
+        .cra_priority           =       PADLOCK_CRA_PRIORITY,
+        .cra_flags              =       CRYPTO_ALG_TYPE_DIGEST |
+                                        CRYPTO_ALG_NEED_FALLBACK,
+        .cra_blocksize          =       SHA1_HMAC_BLOCK_SIZE,
+        .cra_ctxsize            =       sizeof(struct padlock_sha_ctx),
+        .cra_module             =       THIS_MODULE,
+        .cra_list               =       LIST_HEAD_INIT(sha1_alg.cra_list),
+        .cra_init               =       padlock_sha1_cra_init,
+        .cra_exit               =       padlock_cra_exit,
+        .cra_u                  =       {
+                .digest = {
+                        .dia_digestsize =       SHA1_DIGEST_SIZE,
+                        .dia_init       =       padlock_sha_init,
+                        .dia_update     =       padlock_sha_update,
+                        .dia_final      =       padlock_sha_final,
+                }
+        }
+};
+static struct crypto_alg sha256_alg = {
+        .cra_name               =       "sha256",
+        .cra_driver_name        =       "sha256-padlock",
+        .cra_priority           =       PADLOCK_CRA_PRIORITY,
+        .cra_flags              =       CRYPTO_ALG_TYPE_DIGEST |
+                                        CRYPTO_ALG_NEED_FALLBACK,
+        .cra_blocksize          =       SHA256_HMAC_BLOCK_SIZE,
+        .cra_ctxsize            =       sizeof(struct padlock_sha_ctx),
+        .cra_module             =       THIS_MODULE,
+        .cra_list               =       LIST_HEAD_INIT(sha256_alg.cra_list),
+        .cra_init               =       padlock_sha256_cra_init,
+        .cra_exit               =       padlock_cra_exit,
+        .cra_u                  =       {
+                .digest = {
+                        .dia_digestsize =       SHA256_DIGEST_SIZE,
+                        .dia_init       =       padlock_sha_init,
+                        .dia_update     =       padlock_sha_update,
+                        .dia_final      =       padlock_sha_final,
+                }
+        }
+};
+static void __init padlock_sha_check_fallbacks(void)
+{
+        if (!crypto_has_hash("sha1", 0, CRYPTO_ALG_ASYNC |
+                                        CRYPTO_ALG_NEED_FALLBACK))
+                printk(KERN_WARNING PFX
+                       "Couldn't load fallback module for sha1.\n");
+        if (!crypto_has_hash("sha256", 0, CRYPTO_ALG_ASYNC |
+                                        CRYPTO_ALG_NEED_FALLBACK))
+                printk(KERN_WARNING PFX
+                       "Couldn't load fallback module for sha256.\n");
+}
+static int __init padlock_init(void)
+{
+        int rc = -ENODEV;
+        if (!cpu_has_phe) {
+                printk(KERN_ERR PFX "VIA PadLock Hash Engine not detected.\n");
+                return -ENODEV;
+        }
+        if (!cpu_has_phe_enabled) {
+                printk(KERN_ERR PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
+                return -ENODEV;
+        }
+        padlock_sha_check_fallbacks();
+        rc = crypto_register_alg(&sha1_alg);
+        if (rc)
+                goto out;
+        rc = crypto_register_alg(&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_alg(&sha1_alg);
+out:
+        printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
+        return rc;
+}
+static void __exit padlock_fini(void)
+{
+        crypto_unregister_alg(&sha1_alg);
+        crypto_unregister_alg(&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-padlock");
+MODULE_ALIAS("sha256-padlock");

diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c new file mode 100644 index 000000000000..a781fd23b607 --- /dev/null +++ b/drivers/crypto/padlock-sha.c
@@ -0,0 +1,318 @@
	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
	15	#include <crypto/algapi.h>
	16	#include <linux/err.h>
	17	#include <linux/module.h>
	18	#include <linux/init.h>
	19	#include <linux/errno.h>
	20	#include <linux/cryptohash.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/kernel.h>
	23	#include <linux/scatterlist.h>
	24	#include "padlock.h"
	25
	26	#define SHA1_DEFAULT_FALLBACK "sha1-generic"
	27	#define SHA1_DIGEST_SIZE 20
	28	#define SHA1_HMAC_BLOCK_SIZE 64
	29
	30	#define SHA256_DEFAULT_FALLBACK "sha256-generic"
	31	#define SHA256_DIGEST_SIZE 32
	32	#define SHA256_HMAC_BLOCK_SIZE 64
	33
	34	struct padlock_sha_ctx {
	35	char *data;
	36	size_t used;
	37	int bypass;
	38	void (f_sha_padlock)(const char in, char *out, int count);
	39	struct hash_desc fallback;
	40	};
	41
	42	static inline struct padlock_sha_ctx ctx(struct crypto_tfm tfm)
	43	{
	44	return crypto_tfm_ctx(tfm);
	45	}
	46
	47	/* We'll need aligned address on the stack */
	48	#define NEAREST_ALIGNED(ptr) \
	49	((void *)ALIGN((size_t)(ptr), PADLOCK_ALIGNMENT))
	50
	51	static struct crypto_alg sha1_alg, sha256_alg;
	52
	53	static void padlock_sha_bypass(struct crypto_tfm *tfm)
	54	{
	55	if (ctx(tfm)->bypass)
	56	return;
	57
	58	crypto_hash_init(&ctx(tfm)->fallback);
	59	if (ctx(tfm)->data && ctx(tfm)->used) {
	60	struct scatterlist sg;
	61
	62	sg_set_buf(&sg, ctx(tfm)->data, ctx(tfm)->used);
	63	crypto_hash_update(&ctx(tfm)->fallback, &sg, sg.length);
	64	}
	65
	66	ctx(tfm)->used = 0;
	67	ctx(tfm)->bypass = 1;
	68	}
	69
	70	static void padlock_sha_init(struct crypto_tfm *tfm)
	71	{
	72	ctx(tfm)->used = 0;
	73	ctx(tfm)->bypass = 0;
	74	}
	75
	76	static void padlock_sha_update(struct crypto_tfm *tfm,
	77	const uint8_t *data, unsigned int length)
	78	{
	79	/* Our buffer is always one page. */
	80	if (unlikely(!ctx(tfm)->bypass &&
	81	(ctx(tfm)->used + length > PAGE_SIZE)))
	82	padlock_sha_bypass(tfm);
	83
	84	if (unlikely(ctx(tfm)->bypass)) {
	85	struct scatterlist sg;
	86	sg_set_buf(&sg, (uint8_t *)data, length);
	87	crypto_hash_update(&ctx(tfm)->fallback, &sg, length);
	88	return;
	89	}
	90
	91	memcpy(ctx(tfm)->data + ctx(tfm)->used, data, length);
	92	ctx(tfm)->used += length;
	93	}
	94
	95	static inline void padlock_output_block(uint32_t *src,
	96	uint32_t *dst, size_t count)
	97	{
	98	while (count--)
	99	dst++ = swab32(src++);
	100	}
	101
	102	static void padlock_do_sha1(const char in, char out, int count)
	103	{
	104	/* We can't store directly to out as it may be unaligned. /
	105	/* BTW Don't reduce the buffer size below 128 Bytes!
	106	* PadLock microcode needs it that big. */
	107	char buf[128+16];
	108	char *result = NEAREST_ALIGNED(buf);
	109
	110	((uint32_t *)result)[0] = 0x67452301;
	111	((uint32_t *)result)[1] = 0xEFCDAB89;
	112	((uint32_t *)result)[2] = 0x98BADCFE;
	113	((uint32_t *)result)[3] = 0x10325476;
	114	((uint32_t *)result)[4] = 0xC3D2E1F0;
	115
	116	asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */
	117	: "+S"(in), "+D"(result)
	118	: "c"(count), "a"(0));
	119
	120	padlock_output_block((uint32_t )result, (uint32_t )out, 5);
	121	}
	122
	123	static void padlock_do_sha256(const char in, char out, int count)
	124	{
	125	/* We can't store directly to out as it may be unaligned. /
	126	/* BTW Don't reduce the buffer size below 128 Bytes!
	127	* PadLock microcode needs it that big. */
	128	char buf[128+16];
	129	char *result = NEAREST_ALIGNED(buf);
	130
	131	((uint32_t *)result)[0] = 0x6A09E667;
	132	((uint32_t *)result)[1] = 0xBB67AE85;
	133	((uint32_t *)result)[2] = 0x3C6EF372;
	134	((uint32_t *)result)[3] = 0xA54FF53A;
	135	((uint32_t *)result)[4] = 0x510E527F;
	136	((uint32_t *)result)[5] = 0x9B05688C;
	137	((uint32_t *)result)[6] = 0x1F83D9AB;
	138	((uint32_t *)result)[7] = 0x5BE0CD19;
	139
	140	asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */
	141	: "+S"(in), "+D"(result)
	142	: "c"(count), "a"(0));
	143
	144	padlock_output_block((uint32_t )result, (uint32_t )out, 8);
	145	}
	146
	147	static void padlock_sha_final(struct crypto_tfm tfm, uint8_t out)
	148	{
	149	if (unlikely(ctx(tfm)->bypass)) {
	150	crypto_hash_final(&ctx(tfm)->fallback, out);
	151	ctx(tfm)->bypass = 0;
	152	return;
	153	}
	154
	155	/* Pass the input buffer to PadLock microcode... */
	156	ctx(tfm)->f_sha_padlock(ctx(tfm)->data, out, ctx(tfm)->used);
	157
	158	ctx(tfm)->used = 0;
	159	}
	160
	161	static int padlock_cra_init(struct crypto_tfm *tfm)
	162	{
	163	const char *fallback_driver_name = tfm->__crt_alg->cra_name;
	164	struct crypto_hash *fallback_tfm;
	165
	166	/* For now we'll allocate one page. This
	167	* could eventually be configurable one day. */
	168	ctx(tfm)->data = (char *)__get_free_page(GFP_KERNEL);
	169	if (!ctx(tfm)->data)
	170	return -ENOMEM;
	171
	172	/* Allocate a fallback and abort if it failed. */
	173	fallback_tfm = crypto_alloc_hash(fallback_driver_name, 0,
	174	CRYPTO_ALG_ASYNC \|
	175	CRYPTO_ALG_NEED_FALLBACK);
	176	if (IS_ERR(fallback_tfm)) {
	177	printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n",
	178	fallback_driver_name);
	179	free_page((unsigned long)(ctx(tfm)->data));
	180	return PTR_ERR(fallback_tfm);
	181	}
	182
	183	ctx(tfm)->fallback.tfm = fallback_tfm;
	184	return 0;
	185	}
	186
	187	static int padlock_sha1_cra_init(struct crypto_tfm *tfm)
	188	{
	189	ctx(tfm)->f_sha_padlock = padlock_do_sha1;
	190
	191	return padlock_cra_init(tfm);
	192	}
	193
	194	static int padlock_sha256_cra_init(struct crypto_tfm *tfm)
	195	{
	196	ctx(tfm)->f_sha_padlock = padlock_do_sha256;
	197
	198	return padlock_cra_init(tfm);
	199	}
	200
	201	static void padlock_cra_exit(struct crypto_tfm *tfm)
	202	{
	203	if (ctx(tfm)->data) {
	204	free_page((unsigned long)(ctx(tfm)->data));
	205	ctx(tfm)->data = NULL;
	206	}
	207
	208	crypto_free_hash(ctx(tfm)->fallback.tfm);
	209	ctx(tfm)->fallback.tfm = NULL;
	210	}
	211
	212	static struct crypto_alg sha1_alg = {
	213	.cra_name = "sha1",
	214	.cra_driver_name = "sha1-padlock",
	215	.cra_priority = PADLOCK_CRA_PRIORITY,
	216	.cra_flags = CRYPTO_ALG_TYPE_DIGEST \|
	217	CRYPTO_ALG_NEED_FALLBACK,
	218	.cra_blocksize = SHA1_HMAC_BLOCK_SIZE,
	219	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	220	.cra_module = THIS_MODULE,
	221	.cra_list = LIST_HEAD_INIT(sha1_alg.cra_list),
	222	.cra_init = padlock_sha1_cra_init,
	223	.cra_exit = padlock_cra_exit,
	224	.cra_u = {
	225	.digest = {
	226	.dia_digestsize = SHA1_DIGEST_SIZE,
	227	.dia_init = padlock_sha_init,
	228	.dia_update = padlock_sha_update,
	229	.dia_final = padlock_sha_final,
	230	}
	231	}
	232	};
	233
	234	static struct crypto_alg sha256_alg = {
	235	.cra_name = "sha256",
	236	.cra_driver_name = "sha256-padlock",
	237	.cra_priority = PADLOCK_CRA_PRIORITY,
	238	.cra_flags = CRYPTO_ALG_TYPE_DIGEST \|
	239	CRYPTO_ALG_NEED_FALLBACK,
	240	.cra_blocksize = SHA256_HMAC_BLOCK_SIZE,
	241	.cra_ctxsize = sizeof(struct padlock_sha_ctx),
	242	.cra_module = THIS_MODULE,
	243	.cra_list = LIST_HEAD_INIT(sha256_alg.cra_list),
	244	.cra_init = padlock_sha256_cra_init,
	245	.cra_exit = padlock_cra_exit,
	246	.cra_u = {
	247	.digest = {
	248	.dia_digestsize = SHA256_DIGEST_SIZE,
	249	.dia_init = padlock_sha_init,
	250	.dia_update = padlock_sha_update,
	251	.dia_final = padlock_sha_final,
	252	}
	253	}
	254	};
	255
	256	static void __init padlock_sha_check_fallbacks(void)
	257	{
	258	if (!crypto_has_hash("sha1", 0, CRYPTO_ALG_ASYNC \|
	259	CRYPTO_ALG_NEED_FALLBACK))
	260	printk(KERN_WARNING PFX
	261	"Couldn't load fallback module for sha1.\n");
	262
	263	if (!crypto_has_hash("sha256", 0, CRYPTO_ALG_ASYNC \|
	264	CRYPTO_ALG_NEED_FALLBACK))
	265	printk(KERN_WARNING PFX
	266	"Couldn't load fallback module for sha256.\n");
	267	}
	268
	269	static int __init padlock_init(void)
	270	{
	271	int rc = -ENODEV;
	272
	273	if (!cpu_has_phe) {
	274	printk(KERN_ERR PFX "VIA PadLock Hash Engine not detected.\n");
	275	return -ENODEV;
	276	}
	277
	278	if (!cpu_has_phe_enabled) {
	279	printk(KERN_ERR PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
	280	return -ENODEV;
	281	}
	282
	283	padlock_sha_check_fallbacks();
	284
	285	rc = crypto_register_alg(&sha1_alg);
	286	if (rc)
	287	goto out;
	288
	289	rc = crypto_register_alg(&sha256_alg);
	290	if (rc)
	291	goto out_unreg1;
	292
	293	printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n");
	294
	295	return 0;
	296
	297	out_unreg1:
	298	crypto_unregister_alg(&sha1_alg);
	299	out:
	300	printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
	301	return rc;
	302	}
	303
	304	static void __exit padlock_fini(void)
	305	{
	306	crypto_unregister_alg(&sha1_alg);
	307	crypto_unregister_alg(&sha256_alg);
	308	}
	309
	310	module_init(padlock_init);
	311	module_exit(padlock_fini);
	312
	313	MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support.");
	314	MODULE_LICENSE("GPL");
	315	MODULE_AUTHOR("Michal Ludvig");
	316
	317	MODULE_ALIAS("sha1-padlock");
	318	MODULE_ALIAS("sha256-padlock");