* Author: Huang Ying <ying.huang@intel.com>
*/
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/crypto.h>
-#include <crypto/algapi.h>
-#include <crypto/cryptd.h>
-#include <crypto/gf128mul.h>
-#include <crypto/internal/hash.h>
-#include <crypto/internal/simd.h>
#include <asm/cpu_device_id.h>
#include <asm/simd.h>
+#include <crypto/b128ops.h>
+#include <crypto/ghash.h>
+#include <crypto/internal/hash.h>
+#include <crypto/utils.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
#include <linux/unaligned.h>
-#define GHASH_BLOCK_SIZE 16
-#define GHASH_DIGEST_SIZE 16
+asmlinkage void clmul_ghash_mul(char *dst, const le128 *shash);
-void clmul_ghash_mul(char *dst, const le128 *shash);
+asmlinkage int clmul_ghash_update(char *dst, const char *src,
+ unsigned int srclen, const le128 *shash);
-void clmul_ghash_update(char *dst, const char *src, unsigned int srclen,
- const le128 *shash);
-
-struct ghash_async_ctx {
- struct cryptd_ahash *cryptd_tfm;
-};
-
-struct ghash_ctx {
+struct x86_ghash_ctx {
le128 shash;
};
-struct ghash_desc_ctx {
- u8 buffer[GHASH_BLOCK_SIZE];
- u32 bytes;
-};
-
static int ghash_init(struct shash_desc *desc)
{
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
static int ghash_setkey(struct crypto_shash *tfm,
const u8 *key, unsigned int keylen)
{
- struct ghash_ctx *ctx = crypto_shash_ctx(tfm);
+ struct x86_ghash_ctx *ctx = crypto_shash_ctx(tfm);
u64 a, b;
if (keylen != GHASH_BLOCK_SIZE)
static int ghash_update(struct shash_desc *desc,
const u8 *src, unsigned int srclen)
{
+ struct x86_ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
- struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
u8 *dst = dctx->buffer;
+ int remain;
kernel_fpu_begin();
- if (dctx->bytes) {
- int n = min(srclen, dctx->bytes);
- u8 *pos = dst + (GHASH_BLOCK_SIZE - dctx->bytes);
-
- dctx->bytes -= n;
- srclen -= n;
-
- while (n--)
- *pos++ ^= *src++;
-
- if (!dctx->bytes)
- clmul_ghash_mul(dst, &ctx->shash);
- }
-
- clmul_ghash_update(dst, src, srclen, &ctx->shash);
+ remain = clmul_ghash_update(dst, src, srclen, &ctx->shash);
kernel_fpu_end();
-
- if (srclen & 0xf) {
- src += srclen - (srclen & 0xf);
- srclen &= 0xf;
- dctx->bytes = GHASH_BLOCK_SIZE - srclen;
- while (srclen--)
- *dst++ ^= *src++;
- }
-
- return 0;
+ return remain;
}
-static void ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx)
+static void ghash_flush(struct x86_ghash_ctx *ctx, struct ghash_desc_ctx *dctx,
+ const u8 *src, unsigned int len)
{
u8 *dst = dctx->buffer;
- if (dctx->bytes) {
- u8 *tmp = dst + (GHASH_BLOCK_SIZE - dctx->bytes);
-
- while (dctx->bytes--)
- *tmp++ ^= 0;
-
- kernel_fpu_begin();
+ kernel_fpu_begin();
+ if (len) {
+ crypto_xor(dst, src, len);
clmul_ghash_mul(dst, &ctx->shash);
- kernel_fpu_end();
}
-
- dctx->bytes = 0;
+ kernel_fpu_end();
}
-static int ghash_final(struct shash_desc *desc, u8 *dst)
+static int ghash_finup(struct shash_desc *desc, const u8 *src,
+ unsigned int len, u8 *dst)
{
+ struct x86_ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
- struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
u8 *buf = dctx->buffer;
- ghash_flush(ctx, dctx);
+ ghash_flush(ctx, dctx, src, len);
memcpy(dst, buf, GHASH_BLOCK_SIZE);
return 0;
.digestsize = GHASH_DIGEST_SIZE,
.init = ghash_init,
.update = ghash_update,
- .final = ghash_final,
+ .finup = ghash_finup,
.setkey = ghash_setkey,
.descsize = sizeof(struct ghash_desc_ctx),
.base = {
- .cra_name = "__ghash",
- .cra_driver_name = "__ghash-pclmulqdqni",
- .cra_priority = 0,
- .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_name = "ghash",
+ .cra_driver_name = "ghash-pclmulqdqni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
.cra_blocksize = GHASH_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct ghash_ctx),
+ .cra_ctxsize = sizeof(struct x86_ghash_ctx),
.cra_module = THIS_MODULE,
},
};
-static int ghash_async_init(struct ahash_request *req)
-{
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct cryptd_ahash *cryptd_tfm = ctx->cryptd_tfm;
- struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
- struct crypto_shash *child = cryptd_ahash_child(cryptd_tfm);
-
- desc->tfm = child;
- return crypto_shash_init(desc);
-}
-
-static void ghash_init_cryptd_req(struct ahash_request *req)
-{
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
- struct cryptd_ahash *cryptd_tfm = ctx->cryptd_tfm;
-
- ahash_request_set_tfm(cryptd_req, &cryptd_tfm->base);
- ahash_request_set_callback(cryptd_req, req->base.flags,
- req->base.complete, req->base.data);
- ahash_request_set_crypt(cryptd_req, req->src, req->result,
- req->nbytes);
-}
-
-static int ghash_async_update(struct ahash_request *req)
-{
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
- struct cryptd_ahash *cryptd_tfm = ctx->cryptd_tfm;
-
- if (!crypto_simd_usable() ||
- (in_atomic() && cryptd_ahash_queued(cryptd_tfm))) {
- ghash_init_cryptd_req(req);
- return crypto_ahash_update(cryptd_req);
- } else {
- struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
- return shash_ahash_update(req, desc);
- }
-}
-
-static int ghash_async_final(struct ahash_request *req)
-{
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
- struct cryptd_ahash *cryptd_tfm = ctx->cryptd_tfm;
-
- if (!crypto_simd_usable() ||
- (in_atomic() && cryptd_ahash_queued(cryptd_tfm))) {
- ghash_init_cryptd_req(req);
- return crypto_ahash_final(cryptd_req);
- } else {
- struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
- return crypto_shash_final(desc, req->result);
- }
-}
-
-static int ghash_async_import(struct ahash_request *req, const void *in)
-{
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
- struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
-
- ghash_async_init(req);
- memcpy(dctx, in, sizeof(*dctx));
- return 0;
-
-}
-
-static int ghash_async_export(struct ahash_request *req, void *out)
-{
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
- struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
-
- memcpy(out, dctx, sizeof(*dctx));
- return 0;
-
-}
-
-static int ghash_async_digest(struct ahash_request *req)
-{
- struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
- struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
- struct ahash_request *cryptd_req = ahash_request_ctx(req);
- struct cryptd_ahash *cryptd_tfm = ctx->cryptd_tfm;
-
- if (!crypto_simd_usable() ||
- (in_atomic() && cryptd_ahash_queued(cryptd_tfm))) {
- ghash_init_cryptd_req(req);
- return crypto_ahash_digest(cryptd_req);
- } else {
- struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
- struct crypto_shash *child = cryptd_ahash_child(cryptd_tfm);
-
- desc->tfm = child;
- return shash_ahash_digest(req, desc);
- }
-}
-
-static int ghash_async_setkey(struct crypto_ahash *tfm, const u8 *key,
- unsigned int keylen)
-{
- struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
- struct crypto_ahash *child = &ctx->cryptd_tfm->base;
-
- crypto_ahash_clear_flags(child, CRYPTO_TFM_REQ_MASK);
- crypto_ahash_set_flags(child, crypto_ahash_get_flags(tfm)
- & CRYPTO_TFM_REQ_MASK);
- return crypto_ahash_setkey(child, key, keylen);
-}
-
-static int ghash_async_init_tfm(struct crypto_tfm *tfm)
-{
- struct cryptd_ahash *cryptd_tfm;
- struct ghash_async_ctx *ctx = crypto_tfm_ctx(tfm);
-
- cryptd_tfm = cryptd_alloc_ahash("__ghash-pclmulqdqni",
- CRYPTO_ALG_INTERNAL,
- CRYPTO_ALG_INTERNAL);
- if (IS_ERR(cryptd_tfm))
- return PTR_ERR(cryptd_tfm);
- ctx->cryptd_tfm = cryptd_tfm;
- crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
- sizeof(struct ahash_request) +
- crypto_ahash_reqsize(&cryptd_tfm->base));
-
- return 0;
-}
-
-static void ghash_async_exit_tfm(struct crypto_tfm *tfm)
-{
- struct ghash_async_ctx *ctx = crypto_tfm_ctx(tfm);
-
- cryptd_free_ahash(ctx->cryptd_tfm);
-}
-
-static struct ahash_alg ghash_async_alg = {
- .init = ghash_async_init,
- .update = ghash_async_update,
- .final = ghash_async_final,
- .setkey = ghash_async_setkey,
- .digest = ghash_async_digest,
- .export = ghash_async_export,
- .import = ghash_async_import,
- .halg = {
- .digestsize = GHASH_DIGEST_SIZE,
- .statesize = sizeof(struct ghash_desc_ctx),
- .base = {
- .cra_name = "ghash",
- .cra_driver_name = "ghash-clmulni",
- .cra_priority = 400,
- .cra_ctxsize = sizeof(struct ghash_async_ctx),
- .cra_flags = CRYPTO_ALG_ASYNC,
- .cra_blocksize = GHASH_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- .cra_init = ghash_async_init_tfm,
- .cra_exit = ghash_async_exit_tfm,
- },
- },
-};
-
static const struct x86_cpu_id pcmul_cpu_id[] = {
X86_MATCH_FEATURE(X86_FEATURE_PCLMULQDQ, NULL), /* Pickle-Mickle-Duck */
{}
static int __init ghash_pclmulqdqni_mod_init(void)
{
- int err;
-
if (!x86_match_cpu(pcmul_cpu_id))
return -ENODEV;
- err = crypto_register_shash(&ghash_alg);
- if (err)
- goto err_out;
- err = crypto_register_ahash(&ghash_async_alg);
- if (err)
- goto err_shash;
-
- return 0;
-
-err_shash:
- crypto_unregister_shash(&ghash_alg);
-err_out:
- return err;
+ return crypto_register_shash(&ghash_alg);
}
static void __exit ghash_pclmulqdqni_mod_exit(void)
{
- crypto_unregister_ahash(&ghash_async_alg);
crypto_unregister_shash(&ghash_alg);
}
projects / linux-block.git / commitdiff