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crypto: sparc/sha512 - 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 11:00:41 +08:00
parent 572b5c4682
commit d8573b2cf7
1 changed files with 15 additions and 87 deletions
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102
arch/sparc/crypto/sha512_glue.c
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@@ -10,115 +10,43 @@
#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/sha512_base.h>
#include <asm/pstate.h>
#include <asm/elf.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "opcodes.h"
asmlinkage void sha512_sparc64_transform(u64 *digest, const char *data,
unsigned int rounds);
static void __sha512_sparc64_update(struct sha512_state *sctx, const u8 *data,
unsigned int len, unsigned int partial)
static void sha512_block(struct sha512_state *sctx, const u8 *src, int blocks)
{
unsigned int done = 0;
if ((sctx->count[0] += len) < len)
sctx->count[1]++;
if (partial) {
done = SHA512_BLOCK_SIZE - partial;
memcpy(sctx->buf + partial, data, done);
sha512_sparc64_transform(sctx->state, sctx->buf, 1);
}
if (len - done >= SHA512_BLOCK_SIZE) {
const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
sha512_sparc64_transform(sctx->state, data + done, rounds);
done += rounds * SHA512_BLOCK_SIZE;
}
memcpy(sctx->buf, data + done, len - done);
sha512_sparc64_transform(sctx->state, src, blocks);
}
static int sha512_sparc64_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha512_state *sctx = shash_desc_ctx(desc);
unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
/* Handle the fast case right here */
if (partial + len < SHA512_BLOCK_SIZE) {
if ((sctx->count[0] += len) < len)
sctx->count[1]++;
memcpy(sctx->buf + partial, data, len);
} else
__sha512_sparc64_update(sctx, data, len, partial);
return 0;
return sha512_base_do_update_blocks(desc, data, len, sha512_block);
}
static int sha512_sparc64_final(struct shash_desc *desc, u8 *out)
static int sha512_sparc64_finup(struct shash_desc *desc, const u8 *src,
unsigned int len, u8 *out)
{
struct sha512_state *sctx = shash_desc_ctx(desc);
unsigned int i, index, padlen;
__be64 *dst = (__be64 *)out;
__be64 bits[2];
static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
/* Save number of bits */
bits[1] = cpu_to_be64(sctx->count[0] << 3);
bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
/* Pad out to 112 mod 128 and append length */
index = sctx->count[0] % SHA512_BLOCK_SIZE;
padlen = (index < 112) ? (112 - index) : ((SHA512_BLOCK_SIZE+112) - index);
/* We need to fill a whole block for __sha512_sparc64_update() */
if (padlen <= 112) {
if ((sctx->count[0] += padlen) < padlen)
sctx->count[1]++;
memcpy(sctx->buf + index, padding, padlen);
} else {
__sha512_sparc64_update(sctx, padding, padlen, index);
}
__sha512_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 112);
/* Store state in digest */
for (i = 0; i < 8; i++)
dst[i] = cpu_to_be64(sctx->state[i]);
/* Wipe context */
memset(sctx, 0, sizeof(*sctx));
return 0;
}
static int sha384_sparc64_final(struct shash_desc *desc, u8 *hash)
{
u8 D[64];
sha512_sparc64_final(desc, D);
memcpy(hash, D, 48);
memzero_explicit(D, 64);
return 0;
sha512_base_do_finup(desc, src, len, sha512_block);
return sha512_base_finish(desc, out);
}
static struct shash_alg sha512 = {
.digestsize = SHA512_DIGEST_SIZE,
.init = sha512_base_init,
.update = sha512_sparc64_update,
.final = sha512_sparc64_final,
.descsize = sizeof(struct sha512_state),
.finup = sha512_sparc64_finup,
.descsize = SHA512_STATE_SIZE,
.base = {
.cra_name = "sha512",
.cra_driver_name= "sha512-sparc64",
@@ -132,8 +60,8 @@ static struct shash_alg sha384 = {
.digestsize = SHA384_DIGEST_SIZE,
.init = sha384_base_init,
.update = sha512_sparc64_update,
.final = sha384_sparc64_final,
.descsize = sizeof(struct sha512_state),
.finup = sha512_sparc64_finup,
.descsize = SHA512_STATE_SIZE,
.base = {
.cra_name = "sha384",
.cra_driver_name= "sha384-sparc64",