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crypto: arm64/sha1 - Use API partial block handling

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Use the Crypto API partial block handling.

Also remove the unnecessary SIMD fallback path.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2025-04-18 10:59:15 +08:00
parent 0865a89413
commit b97d31100e
1 changed files with 17 additions and 49 deletions
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66
arch/arm64/crypto/sha1-ce-glue.c
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@@ -7,14 +7,14 @@
#include <asm/neon.h>
#include <asm/simd.h>
#include <linux/unaligned.h>
#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
@@ -56,79 +56,47 @@ static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
{
struct sha1_ce_state *sctx = shash_desc_ctx(desc);
if (!crypto_simd_usable())
return crypto_sha1_update(desc, data, len);
sctx->finalize = 0;
sha1_base_do_update(desc, data, len, sha1_ce_transform);
return 0;
return sha1_base_do_update_blocks(desc, data, len, sha1_ce_transform);
}
static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
struct sha1_ce_state *sctx = shash_desc_ctx(desc);
bool finalize = !sctx->sst.count && !(len % SHA1_BLOCK_SIZE) && len;
if (!crypto_simd_usable())
return crypto_sha1_finup(desc, data, len, out);
bool finalized = false;
/*
* Allow the asm code to perform the finalization if there is no
* partial data and the input is a round multiple of the block size.
*/
sctx->finalize = finalize;
if (len >= SHA1_BLOCK_SIZE) {
unsigned int remain = len - round_down(len, SHA1_BLOCK_SIZE);
sha1_base_do_update(desc, data, len, sha1_ce_transform);
if (!finalize)
sha1_base_do_finalize(desc, sha1_ce_transform);
finalized = !remain;
sctx->finalize = finalized;
sha1_base_do_update_blocks(desc, data, len, sha1_ce_transform);
data += len - remain;
len = remain;
}
if (!finalized)
sha1_base_do_finup(desc, data, len, sha1_ce_transform);
return sha1_base_finish(desc, out);
}
static int sha1_ce_final(struct shash_desc *desc, u8 *out)
{
struct sha1_ce_state *sctx = shash_desc_ctx(desc);
if (!crypto_simd_usable())
return crypto_sha1_finup(desc, NULL, 0, out);
sctx->finalize = 0;
sha1_base_do_finalize(desc, sha1_ce_transform);
return sha1_base_finish(desc, out);
}
static int sha1_ce_export(struct shash_desc *desc, void *out)
{
struct sha1_ce_state *sctx = shash_desc_ctx(desc);
memcpy(out, &sctx->sst, sizeof(struct sha1_state));
return 0;
}
static int sha1_ce_import(struct shash_desc *desc, const void *in)
{
struct sha1_ce_state *sctx = shash_desc_ctx(desc);
memcpy(&sctx->sst, in, sizeof(struct sha1_state));
sctx->finalize = 0;
return 0;
}
static struct shash_alg alg = {
.init = sha1_base_init,
.update = sha1_ce_update,
.final = sha1_ce_final,
.finup = sha1_ce_finup,
.import = sha1_ce_import,
.export = sha1_ce_export,
.descsize = sizeof(struct sha1_ce_state),
.statesize = sizeof(struct sha1_state),
.statesize = SHA1_STATE_SIZE,
.digestsize = SHA1_DIGEST_SIZE,
.base = {
.cra_name = "sha1",
.cra_driver_name = "sha1-ce",
.cra_priority = 200,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
CRYPTO_AHASH_ALG_FINUP_MAX,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}