*
*/
+#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/crypto.h>
-#include <linux/cryptohash.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
+#include <asm/i387.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
-
-static char *sha1_fallback = SHA1_DEFAULT_FALLBACK;
-static char *sha256_fallback = SHA256_DEFAULT_FALLBACK;
-
-module_param(sha1_fallback, charp, 0644);
-module_param(sha256_fallback, charp, 0644);
-
-MODULE_PARM_DESC(sha1_fallback, "Fallback driver for SHA1. Default is "
- SHA1_DEFAULT_FALLBACK);
-MODULE_PARM_DESC(sha256_fallback, "Fallback driver for SHA256. Default is "
- SHA256_DEFAULT_FALLBACK);
+struct padlock_sha_desc {
+ struct shash_desc fallback;
+};
struct padlock_sha_ctx {
- char *data;
- size_t used;
- int bypass;
- void (*f_sha_padlock)(const char *in, char *out, int count);
- struct crypto_tfm *fallback_tfm;
+ struct crypto_shash *fallback;
};
-static inline struct padlock_sha_ctx *ctx(struct crypto_tfm *tfm)
+static int padlock_sha_init(struct shash_desc *desc)
{
- return (struct padlock_sha_ctx *)(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;
+ struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
+ struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm);
-static void padlock_sha_bypass(struct crypto_tfm *tfm)
-{
- if (ctx(tfm)->bypass)
- return;
-
- BUG_ON(!ctx(tfm)->fallback_tfm);
-
- crypto_digest_init(ctx(tfm)->fallback_tfm);
- if (ctx(tfm)->data && ctx(tfm)->used) {
- struct scatterlist sg;
-
- sg_set_buf(&sg, ctx(tfm)->data, ctx(tfm)->used);
- crypto_digest_update(ctx(tfm)->fallback_tfm, &sg, 1);
- }
-
- ctx(tfm)->used = 0;
- ctx(tfm)->bypass = 1;
+ dctx->fallback.tfm = ctx->fallback;
+ dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+ return crypto_shash_init(&dctx->fallback);
}
-static void padlock_sha_init(struct crypto_tfm *tfm)
+static int padlock_sha_update(struct shash_desc *desc,
+ const u8 *data, unsigned int length)
{
- ctx(tfm)->used = 0;
- ctx(tfm)->bypass = 0;
-}
+ struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
-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;
- BUG_ON(!ctx(tfm)->fallback_tfm);
- sg_set_buf(&sg, (uint8_t *)data, length);
- crypto_digest_update(ctx(tfm)->fallback_tfm, &sg, 1);
- return;
- }
-
- memcpy(ctx(tfm)->data + ctx(tfm)->used, data, length);
- ctx(tfm)->used += length;
+ 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,
*dst++ = swab32(*src++);
}
-void padlock_do_sha1(const char *in, char *out, int count)
+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+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;
-
+ char result[128] __attribute__ ((aligned(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 */
- : "+S"(in), "+D"(result)
- : "c"(count), "a"(0));
+ : \
+ : "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);
}
-void padlock_do_sha256(const char *in, char *out, int count)
+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+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;
+ char result[128] __attribute__ ((aligned(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 */
- : "+S"(in), "+D"(result)
- : "c"(count), "a"(0));
+ : \
+ : "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 void padlock_sha_final(struct crypto_tfm *tfm, uint8_t *out)
+static int padlock_sha256_final(struct shash_desc *desc, u8 *out)
{
- if (unlikely(ctx(tfm)->bypass)) {
- BUG_ON(!ctx(tfm)->fallback_tfm);
- crypto_digest_final(ctx(tfm)->fallback_tfm, 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);
+ u8 buf[4];
- ctx(tfm)->used = 0;
+ return padlock_sha256_finup(desc, buf, 0, out);
}
-static int padlock_cra_init(struct crypto_tfm *tfm, const char *fallback_driver_name)
+static int padlock_cra_init(struct crypto_tfm *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;
+ 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. */
- ctx(tfm)->fallback_tfm = crypto_alloc_tfm(fallback_driver_name, 0);
- if (!ctx(tfm)->fallback_tfm) {
+ 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);
- free_page((unsigned long)(ctx(tfm)->data));
- return -ENOENT;
+ err = PTR_ERR(fallback_tfm);
+ goto out;
}
+ ctx->fallback = fallback_tfm;
+ hash->descsize += crypto_shash_descsize(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, sha1_fallback);
-}
-
-static int padlock_sha256_cra_init(struct crypto_tfm *tfm)
-{
- ctx(tfm)->f_sha_padlock = padlock_do_sha256;
-
- return padlock_cra_init(tfm, sha256_fallback);
+out:
+ return err;
}
static void padlock_cra_exit(struct crypto_tfm *tfm)
{
- if (ctx(tfm)->data) {
- free_page((unsigned long)(ctx(tfm)->data));
- ctx(tfm)->data = NULL;
- }
+ struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm);
- BUG_ON(!ctx(tfm)->fallback_tfm);
- crypto_free_tfm(ctx(tfm)->fallback_tfm);
- ctx(tfm)->fallback_tfm = NULL;
+ crypto_free_shash(ctx->fallback);
}
-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,
- .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 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 crypto_alg sha256_alg = {
- .cra_name = "sha256",
- .cra_driver_name = "sha256-padlock",
- .cra_priority = PADLOCK_CRA_PRIORITY,
- .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
- .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 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 void __init padlock_sha_check_fallbacks(void)
-{
- static struct crypto_tfm *tfm_sha1, *tfm_sha256;
-
- /* We'll try to allocate one TFM for each fallback
- * to test that the modules are available. */
- tfm_sha1 = crypto_alloc_tfm(sha1_fallback, 0);
- if (!tfm_sha1) {
- printk(KERN_WARNING PFX "Couldn't load fallback module for '%s'. Tried '%s'.\n",
- sha1_alg.cra_name, sha1_fallback);
- } else {
- printk(KERN_NOTICE PFX "Fallback for '%s' is driver '%s' (prio=%d)\n", sha1_alg.cra_name,
- crypto_tfm_alg_driver_name(tfm_sha1), crypto_tfm_alg_priority(tfm_sha1));
- crypto_free_tfm(tfm_sha1);
- }
-
- tfm_sha256 = crypto_alloc_tfm(sha256_fallback, 0);
- if (!tfm_sha256) {
- printk(KERN_WARNING PFX "Couldn't load fallback module for '%s'. Tried '%s'.\n",
- sha256_alg.cra_name, sha256_fallback);
- } else {
- printk(KERN_NOTICE PFX "Fallback for '%s' is driver '%s' (prio=%d)\n", sha256_alg.cra_name,
- crypto_tfm_alg_driver_name(tfm_sha256), crypto_tfm_alg_priority(tfm_sha256));
- crypto_free_tfm(tfm_sha256);
- }
-}
-
static int __init padlock_init(void)
{
int rc = -ENODEV;
if (!cpu_has_phe) {
- printk(KERN_ERR PFX "VIA PadLock Hash Engine not detected.\n");
+ printk(KERN_NOTICE 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");
+ printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
return -ENODEV;
}
- padlock_sha_check_fallbacks();
-
- rc = crypto_register_alg(&sha1_alg);
+ rc = crypto_register_shash(&sha1_alg);
if (rc)
goto out;
- rc = crypto_register_alg(&sha256_alg);
+ rc = crypto_register_shash(&sha256_alg);
if (rc)
goto out_unreg1;
return 0;
out_unreg1:
- crypto_unregister_alg(&sha1_alg);
+ 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_alg(&sha1_alg);
- crypto_unregister_alg(&sha256_alg);
+ crypto_unregister_shash(&sha1_alg);
+ crypto_unregister_shash(&sha256_alg);
}
module_init(padlock_init);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michal Ludvig");
+MODULE_ALIAS("sha1-all");
+MODULE_ALIAS("sha256-all");
MODULE_ALIAS("sha1-padlock");
MODULE_ALIAS("sha256-padlock");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff