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crypto: powerpc/sha1-spe - 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 10:59:31 +08:00
parent c0f07da681
commit 52c7878306
1 changed files with 24 additions and 108 deletions
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132
arch/powerpc/crypto/sha1-spe-glue.c
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@ -7,16 +7,13 @@
* Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.de>
*/
#include <asm/switch_to.h>
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <asm/byteorder.h>
#include <asm/switch_to.h>
#include <linux/hardirq.h>
#include <linux/kernel.h>
#include <linux/preempt.h>
#include <linux/module.h>
/*
* MAX_BYTES defines the number of bytes that are allowed to be processed
@ -30,7 +27,7 @@
*/
#define MAX_BYTES 2048
extern void ppc_spe_sha1_transform(u32 *state, const u8 *src, u32 blocks);
asmlinkage void ppc_spe_sha1_transform(u32 *state, const u8 *src, u32 blocks);
static void spe_begin(void)
{
@ -46,126 +43,45 @@ static void spe_end(void)
preempt_enable();
}
static inline void ppc_sha1_clear_context(struct sha1_state *sctx)
static void ppc_spe_sha1_block(struct sha1_state *sctx, const u8 *src,
int blocks)
{
int count = sizeof(struct sha1_state) >> 2;
u32 *ptr = (u32 *)sctx;
do {
int unit = min(blocks, MAX_BYTES / SHA1_BLOCK_SIZE);
/* make sure we can clear the fast way */
BUILD_BUG_ON(sizeof(struct sha1_state) % 4);
do { *ptr++ = 0; } while (--count);
spe_begin();
ppc_spe_sha1_transform(sctx->state, src, unit);
spe_end();
src += unit * SHA1_BLOCK_SIZE;
blocks -= unit;
} while (blocks);
}
static int ppc_spe_sha1_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
const unsigned int offset = sctx->count & 0x3f;
const unsigned int avail = 64 - offset;
unsigned int bytes;
const u8 *src = data;
if (avail > len) {
sctx->count += len;
memcpy((char *)sctx->buffer + offset, src, len);
return 0;
}
sctx->count += len;
if (offset) {
memcpy((char *)sctx->buffer + offset, src, avail);
spe_begin();
ppc_spe_sha1_transform(sctx->state, (const u8 *)sctx->buffer, 1);
spe_end();
len -= avail;
src += avail;
}
while (len > 63) {
bytes = (len > MAX_BYTES) ? MAX_BYTES : len;
bytes = bytes & ~0x3f;
spe_begin();
ppc_spe_sha1_transform(sctx->state, src, bytes >> 6);
spe_end();
src += bytes;
len -= bytes;
}
memcpy((char *)sctx->buffer, src, len);
return 0;
return sha1_base_do_update_blocks(desc, data, len, ppc_spe_sha1_block);
}
static int ppc_spe_sha1_final(struct shash_desc *desc, u8 *out)
static int ppc_spe_sha1_finup(struct shash_desc *desc, const u8 *src,
unsigned int len, u8 *out)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
const unsigned int offset = sctx->count & 0x3f;
char *p = (char *)sctx->buffer + offset;
int padlen;
__be64 *pbits = (__be64 *)(((char *)&sctx->buffer) + 56);
__be32 *dst = (__be32 *)out;
padlen = 55 - offset;
*p++ = 0x80;
spe_begin();
if (padlen < 0) {
memset(p, 0x00, padlen + sizeof (u64));
ppc_spe_sha1_transform(sctx->state, sctx->buffer, 1);
p = (char *)sctx->buffer;
padlen = 56;
}
memset(p, 0, padlen);
*pbits = cpu_to_be64(sctx->count << 3);
ppc_spe_sha1_transform(sctx->state, sctx->buffer, 1);
spe_end();
dst[0] = cpu_to_be32(sctx->state[0]);
dst[1] = cpu_to_be32(sctx->state[1]);
dst[2] = cpu_to_be32(sctx->state[2]);
dst[3] = cpu_to_be32(sctx->state[3]);
dst[4] = cpu_to_be32(sctx->state[4]);
ppc_sha1_clear_context(sctx);
return 0;
}
static int ppc_spe_sha1_export(struct shash_desc *desc, void *out)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
return 0;
}
static int ppc_spe_sha1_import(struct shash_desc *desc, const void *in)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
return 0;
sha1_base_do_finup(desc, src, len, ppc_spe_sha1_block);
return sha1_base_finish(desc, out);
}
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = sha1_base_init,
.update = ppc_spe_sha1_update,
.final = ppc_spe_sha1_final,
.export = ppc_spe_sha1_export,
.import = ppc_spe_sha1_import,
.descsize = sizeof(struct sha1_state),
.statesize = sizeof(struct sha1_state),
.finup = ppc_spe_sha1_finup,
.descsize = SHA1_STATE_SIZE,
.base = {
.cra_name = "sha1",
.cra_driver_name= "sha1-ppc-spe",
.cra_priority = 300,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}