[PATCH v3 11/16] crypto/arm: move SHA-224/256 ARMv8 implementation to base layer
Ard Biesheuvel
ard.biesheuvel at linaro.org
Tue Apr 7 01:51:59 PDT 2015
Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
---
arch/arm/crypto/Kconfig | 2 +-
arch/arm/crypto/sha2-ce-glue.c | 154 ++++++++++-------------------------------
2 files changed, 36 insertions(+), 120 deletions(-)
diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig
index 5ed98bc6f95d..a267529d9577 100644
--- a/arch/arm/crypto/Kconfig
+++ b/arch/arm/crypto/Kconfig
@@ -39,7 +39,7 @@ config CRYPTO_SHA1_ARM_CE
config CRYPTO_SHA2_ARM_CE
tristate "SHA-224/256 digest algorithm (ARM v8 Crypto Extensions)"
depends on KERNEL_MODE_NEON
- select CRYPTO_SHA256
+ select CRYPTO_SHA256_ARM
select CRYPTO_HASH
help
SHA-256 secure hash standard (DFIPS 180-2) implemented
diff --git a/arch/arm/crypto/sha2-ce-glue.c b/arch/arm/crypto/sha2-ce-glue.c
index 0449eca3aab3..6110b937264c 100644
--- a/arch/arm/crypto/sha2-ce-glue.c
+++ b/arch/arm/crypto/sha2-ce-glue.c
@@ -10,6 +10,7 @@
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
+#include <crypto/sha256_base.h>
#include <linux/crypto.h>
#include <linux/module.h>
@@ -18,145 +19,59 @@
#include <asm/neon.h>
#include <asm/unaligned.h>
+#include "sha256_glue.h"
+
MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel at linaro.org>");
MODULE_LICENSE("GPL v2");
asmlinkage void sha2_ce_transform(int blocks, u8 const *src, u32 *state,
- u8 *head);
+ const u8 *head, void *p);
-static int sha224_init(struct shash_desc *desc)
+static int sha2_ce_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
- *sctx = (struct sha256_state){
- .state = {
- SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3,
- SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7,
- }
- };
- return 0;
-}
+ if (!may_use_simd() ||
+ (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
+ return crypto_sha256_arm_update(desc, data, len);
-static int sha256_init(struct shash_desc *desc)
-{
- struct sha256_state *sctx = shash_desc_ctx(desc);
+ kernel_neon_begin();
+ sha256_base_do_update(desc, data, len, sha2_ce_transform, NULL);
+ kernel_neon_end();
- *sctx = (struct sha256_state){
- .state = {
- SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
- SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7,
- }
- };
return 0;
}
-static int sha2_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
+static int sha2_ce_finup(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out)
{
- struct sha256_state *sctx = shash_desc_ctx(desc);
- unsigned int partial;
-
if (!may_use_simd())
- return crypto_sha256_update(desc, data, len);
-
- partial = sctx->count % SHA256_BLOCK_SIZE;
- sctx->count += len;
-
- if ((partial + len) >= SHA256_BLOCK_SIZE) {
- int blocks;
-
- if (partial) {
- int p = SHA256_BLOCK_SIZE - partial;
-
- memcpy(sctx->buf + partial, data, p);
- data += p;
- len -= p;
- }
-
- blocks = len / SHA256_BLOCK_SIZE;
- len %= SHA256_BLOCK_SIZE;
+ return crypto_sha256_arm_finup(desc, data, len, out);
- kernel_neon_begin();
- sha2_ce_transform(blocks, data, sctx->state,
- partial ? sctx->buf : NULL);
- kernel_neon_end();
-
- data += blocks * SHA256_BLOCK_SIZE;
- partial = 0;
- }
+ kernel_neon_begin();
if (len)
- memcpy(sctx->buf + partial, data, len);
- return 0;
-}
-
-static void sha2_final(struct shash_desc *desc)
-{
- static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, };
+ sha256_base_do_update(desc, data, len,
+ sha2_ce_transform, NULL);
+ sha256_base_do_finalize(desc, sha2_ce_transform, NULL);
+ kernel_neon_end();
- struct sha256_state *sctx = shash_desc_ctx(desc);
- __be64 bits = cpu_to_be64(sctx->count << 3);
- u32 padlen = SHA256_BLOCK_SIZE
- - ((sctx->count + sizeof(bits)) % SHA256_BLOCK_SIZE);
-
- sha2_update(desc, padding, padlen);
- sha2_update(desc, (const u8 *)&bits, sizeof(bits));
+ return sha256_base_finish(desc, out);
}
-static int sha224_final(struct shash_desc *desc, u8 *out)
+static int sha2_ce_final(struct shash_desc *desc, u8 *out)
{
- struct sha256_state *sctx = shash_desc_ctx(desc);
- __be32 *dst = (__be32 *)out;
- int i;
-
- sha2_final(desc);
-
- for (i = 0; i < SHA224_DIGEST_SIZE / sizeof(__be32); i++)
- put_unaligned_be32(sctx->state[i], dst++);
-
- *sctx = (struct sha256_state){};
- return 0;
-}
-
-static int sha256_final(struct shash_desc *desc, u8 *out)
-{
- struct sha256_state *sctx = shash_desc_ctx(desc);
- __be32 *dst = (__be32 *)out;
- int i;
-
- sha2_final(desc);
-
- for (i = 0; i < SHA256_DIGEST_SIZE / sizeof(__be32); i++)
- put_unaligned_be32(sctx->state[i], dst++);
-
- *sctx = (struct sha256_state){};
- return 0;
-}
-
-static int sha2_export(struct shash_desc *desc, void *out)
-{
- struct sha256_state *sctx = shash_desc_ctx(desc);
- struct sha256_state *dst = out;
-
- *dst = *sctx;
- return 0;
-}
-
-static int sha2_import(struct shash_desc *desc, const void *in)
-{
- struct sha256_state *sctx = shash_desc_ctx(desc);
- struct sha256_state const *src = in;
-
- *sctx = *src;
- return 0;
+ return sha2_ce_finup(desc, NULL, 0, out);
}
static struct shash_alg algs[] = { {
- .init = sha224_init,
- .update = sha2_update,
- .final = sha224_final,
- .export = sha2_export,
- .import = sha2_import,
+ .init = sha224_base_init,
+ .update = sha2_ce_update,
+ .final = sha2_ce_final,
+ .finup = sha2_ce_finup,
+ .export = sha256_base_export,
+ .import = sha256_base_import,
.descsize = sizeof(struct sha256_state),
.digestsize = SHA224_DIGEST_SIZE,
.statesize = sizeof(struct sha256_state),
@@ -169,11 +84,12 @@ static struct shash_alg algs[] = { {
.cra_module = THIS_MODULE,
}
}, {
- .init = sha256_init,
- .update = sha2_update,
- .final = sha256_final,
- .export = sha2_export,
- .import = sha2_import,
+ .init = sha256_base_init,
+ .update = sha2_ce_update,
+ .final = sha2_ce_final,
+ .finup = sha2_ce_finup,
+ .export = sha256_base_export,
+ .import = sha256_base_import,
.descsize = sizeof(struct sha256_state),
.digestsize = SHA256_DIGEST_SIZE,
.statesize = sizeof(struct sha256_state),
--
1.8.3.2
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