@@ -31,7 +31,6 @@ config CRYPTO_SHA1_ARM_CE
tristate "SHA1 digest algorithm (ARM v8 Crypto Extensions)"
depends on KERNEL_MODE_NEON
select CRYPTO_SHA1_ARM
- select CRYPTO_SHA1
select CRYPTO_HASH
help
SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
@@ -61,8 +61,8 @@
.word 0xca62c1d6, 0xca62c1d6, 0xca62c1d6, 0xca62c1d6
/*
- * void sha1_ce_transform(int blocks, u8 const *src, u32 *state,
- * u8 *head);
+ * void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
+ * int blocks);
*/
ENTRY(sha1_ce_transform)
/* load round constants */
@@ -71,23 +71,14 @@ ENTRY(sha1_ce_transform)
vld1.32 {k2-k3}, [ip, :128]
/* load state */
- vld1.32 {dga}, [r2]
- vldr dgbs, [r2, #16]
-
- /* load partial input (if supplied) */
- teq r3, #0
- beq 0f
- vld1.32 {q8-q9}, [r3]!
- vld1.32 {q10-q11}, [r3]
- teq r0, #0
- b 1f
+ vld1.32 {dga}, [r0]
+ vldr dgbs, [r0, #16]
/* load input */
0: vld1.32 {q8-q9}, [r1]!
vld1.32 {q10-q11}, [r1]!
- subs r0, r0, #1
+ subs r2, r2, #1
-1:
#ifndef CONFIG_CPU_BIG_ENDIAN
vrev32.8 q8, q8
vrev32.8 q9, q9
@@ -128,7 +119,7 @@ ENTRY(sha1_ce_transform)
bne 0b
/* store new state */
- vst1.32 {dga}, [r2]
- vstr dgbs, [r2, #16]
+ vst1.32 {dga}, [r0]
+ vstr dgbs, [r0, #16]
bx lr
ENDPROC(sha1_ce_transform)
@@ -10,13 +10,13 @@
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
+#include <crypto/sha1_base.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <asm/hwcap.h>
#include <asm/neon.h>
#include <asm/simd.h>
-#include <asm/unaligned.h>
#include "sha1.h"
@@ -24,107 +24,52 @@ MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
-asmlinkage void sha1_ce_transform(int blocks, u8 const *src, u32 *state,
- u8 *head);
+asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
+ int blocks);
-static int sha1_init(struct shash_desc *desc)
+static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
- *sctx = (struct sha1_state){
- .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
- };
- return 0;
-}
-
-static int sha1_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- unsigned int partial;
-
- if (!may_use_simd())
+ if (!may_use_simd() ||
+ (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
return sha1_update_arm(desc, data, len);
- partial = sctx->count % SHA1_BLOCK_SIZE;
- sctx->count += len;
-
- if ((partial + len) >= SHA1_BLOCK_SIZE) {
- int blocks;
+ kernel_neon_begin();
+ sha1_base_do_update(desc, data, len, sha1_ce_transform);
+ kernel_neon_end();
- if (partial) {
- int p = SHA1_BLOCK_SIZE - partial;
-
- memcpy(sctx->buffer + partial, data, p);
- data += p;
- len -= p;
- }
-
- blocks = len / SHA1_BLOCK_SIZE;
- len %= SHA1_BLOCK_SIZE;
-
- kernel_neon_begin();
- sha1_ce_transform(blocks, data, sctx->state,
- partial ? sctx->buffer : NULL);
- kernel_neon_end();
-
- data += blocks * SHA1_BLOCK_SIZE;
- partial = 0;
- }
- if (len)
- memcpy(sctx->buffer + partial, data, len);
return 0;
}
-static int sha1_final(struct shash_desc *desc, u8 *out)
+static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
+ unsigned int len, u8 *out)
{
- static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
-
- struct sha1_state *sctx = shash_desc_ctx(desc);
- __be64 bits = cpu_to_be64(sctx->count << 3);
- __be32 *dst = (__be32 *)out;
- int i;
-
- u32 padlen = SHA1_BLOCK_SIZE
- - ((sctx->count + sizeof(bits)) % SHA1_BLOCK_SIZE);
-
- sha1_update(desc, padding, padlen);
- sha1_update(desc, (const u8 *)&bits, sizeof(bits));
-
- for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(__be32); i++)
- put_unaligned_be32(sctx->state[i], dst++);
-
- *sctx = (struct sha1_state){};
- return 0;
-}
+ if (!may_use_simd())
+ return sha1_finup_arm(desc, data, len, out);
-static int sha1_export(struct shash_desc *desc, void *out)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- struct sha1_state *dst = out;
+ kernel_neon_begin();
+ if (len)
+ sha1_base_do_update(desc, data, len, sha1_ce_transform);
+ sha1_base_do_finalize(desc, sha1_ce_transform);
+ kernel_neon_end();
- *dst = *sctx;
- return 0;
+ return sha1_base_finish(desc, out);
}
-static int sha1_import(struct shash_desc *desc, const void *in)
+static int sha1_ce_final(struct shash_desc *desc, u8 *out)
{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- struct sha1_state const *src = in;
-
- *sctx = *src;
- return 0;
+ return sha1_ce_finup(desc, NULL, 0, out);
}
static struct shash_alg alg = {
- .init = sha1_init,
- .update = sha1_update,
- .final = sha1_final,
- .export = sha1_export,
- .import = sha1_import,
+ .init = sha1_base_init,
+ .update = sha1_ce_update,
+ .final = sha1_ce_final,
+ .finup = sha1_ce_finup,
.descsize = sizeof(struct sha1_state),
.digestsize = SHA1_DIGEST_SIZE,
- .statesize = sizeof(struct sha1_state),
.base = {
.cra_name = "sha1",
.cra_driver_name = "sha1-ce",
This removes all the boilerplate from the existing implementation, and replaces it with calls into the base layer. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- arch/arm/crypto/Kconfig | 1 - arch/arm/crypto/sha1-ce-core.S | 23 +++------ arch/arm/crypto/sha1-ce-glue.c | 107 ++++++++++------------------------------- 3 files changed, 33 insertions(+), 98 deletions(-)