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crypto: sparc/sha256 - Use API partial block handling

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Use the Crypto API partial block handling.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2025-04-18 11:00:06 +08:00
parent 1340113bdb
commit 4dc9479742
1 changed files with 20 additions and 101 deletions
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121
arch/sparc/crypto/sha256_glue.c
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@@ -11,133 +11,50 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <asm/elf.h>
#include <asm/pstate.h>
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sha2.h>
#include <crypto/sha256_base.h>
#include <asm/pstate.h>
#include <asm/elf.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "opcodes.h"
asmlinkage void sha256_sparc64_transform(u32 *digest, const char *data,
unsigned int rounds);
static void __sha256_sparc64_update(struct sha256_state *sctx, const u8 *data,
unsigned int len, unsigned int partial)
static void sha256_block(struct crypto_sha256_state *sctx, const u8 *src,
int blocks)
{
unsigned int done = 0;
sctx->count += len;
if (partial) {
done = SHA256_BLOCK_SIZE - partial;
memcpy(sctx->buf + partial, data, done);
sha256_sparc64_transform(sctx->state, sctx->buf, 1);
}
if (len - done >= SHA256_BLOCK_SIZE) {
const unsigned int rounds = (len - done) / SHA256_BLOCK_SIZE;
sha256_sparc64_transform(sctx->state, data + done, rounds);
done += rounds * SHA256_BLOCK_SIZE;
}
memcpy(sctx->buf, data + done, len - done);
sha256_sparc64_transform(sctx->state, src, blocks);
}
static int sha256_sparc64_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
unsigned int partial = sctx->count % SHA256_BLOCK_SIZE;
/* Handle the fast case right here */
if (partial + len < SHA256_BLOCK_SIZE) {
sctx->count += len;
memcpy(sctx->buf + partial, data, len);
} else
__sha256_sparc64_update(sctx, data, len, partial);
return 0;
return sha256_base_do_update_blocks(desc, data, len, sha256_block);
}
static int sha256_sparc64_final(struct shash_desc *desc, u8 *out)
static int sha256_sparc64_finup(struct shash_desc *desc, const u8 *src,
unsigned int len, u8 *out)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
unsigned int i, index, padlen;
__be32 *dst = (__be32 *)out;
__be64 bits;
static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, };
bits = cpu_to_be64(sctx->count << 3);
/* Pad out to 56 mod 64 and append length */
index = sctx->count % SHA256_BLOCK_SIZE;
padlen = (index < 56) ? (56 - index) : ((SHA256_BLOCK_SIZE+56) - index);
/* We need to fill a whole block for __sha256_sparc64_update() */
if (padlen <= 56) {
sctx->count += padlen;
memcpy(sctx->buf + index, padding, padlen);
} else {
__sha256_sparc64_update(sctx, padding, padlen, index);
}
__sha256_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
/* Store state in digest */
for (i = 0; i < 8; i++)
dst[i] = cpu_to_be32(sctx->state[i]);
/* Wipe context */
memset(sctx, 0, sizeof(*sctx));
return 0;
}
static int sha224_sparc64_final(struct shash_desc *desc, u8 *hash)
{
u8 D[SHA256_DIGEST_SIZE];
sha256_sparc64_final(desc, D);
memcpy(hash, D, SHA224_DIGEST_SIZE);
memzero_explicit(D, SHA256_DIGEST_SIZE);
return 0;
}
static int sha256_sparc64_export(struct shash_desc *desc, void *out)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
return 0;
}
static int sha256_sparc64_import(struct shash_desc *desc, const void *in)
{
struct sha256_state *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
return 0;
sha256_base_do_finup(desc, src, len, sha256_block);
return sha256_base_finish(desc, out);
}
static struct shash_alg sha256_alg = {
.digestsize = SHA256_DIGEST_SIZE,
.init = sha256_base_init,
.update = sha256_sparc64_update,
.final = sha256_sparc64_final,
.export = sha256_sparc64_export,
.import = sha256_sparc64_import,
.descsize = sizeof(struct sha256_state),
.statesize = sizeof(struct sha256_state),
.finup = sha256_sparc64_finup,
.descsize = sizeof(struct crypto_sha256_state),
.base = {
.cra_name = "sha256",
.cra_driver_name= "sha256-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
CRYPTO_AHASH_ALG_FINUP_MAX,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
@@ -147,12 +64,14 @@ static struct shash_alg sha224_alg = {
.digestsize = SHA224_DIGEST_SIZE,
.init = sha224_base_init,
.update = sha256_sparc64_update,
.final = sha224_sparc64_final,
.descsize = sizeof(struct sha256_state),
.finup = sha256_sparc64_finup,
.descsize = sizeof(struct crypto_sha256_state),
.base = {
.cra_name = "sha224",
.cra_driver_name= "sha224-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
CRYPTO_AHASH_ALG_FINUP_MAX,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}