mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-20 01:24:39 +08:00
cc8166bfc8
The compiler complains that p8_ghash_alg isn't declared which is because the header file aesp8-ppc.h isn't included in ghash.c. This patch fixes the warning. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Breno Leitao <leitao@debian.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
186 lines
4.5 KiB
C
186 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* GHASH routines supporting VMX instructions on the Power 8
|
|
*
|
|
* Copyright (C) 2015, 2019 International Business Machines Inc.
|
|
*
|
|
* Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
|
|
*
|
|
* Extended by Daniel Axtens <dja@axtens.net> to replace the fallback
|
|
* mechanism. The new approach is based on arm64 code, which is:
|
|
* Copyright (C) 2014 - 2018 Linaro Ltd. <ard.biesheuvel@linaro.org>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/err.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/delay.h>
|
|
#include <asm/simd.h>
|
|
#include <asm/switch_to.h>
|
|
#include <crypto/aes.h>
|
|
#include <crypto/ghash.h>
|
|
#include <crypto/scatterwalk.h>
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/internal/simd.h>
|
|
#include <crypto/b128ops.h>
|
|
#include "aesp8-ppc.h"
|
|
|
|
void gcm_init_p8(u128 htable[16], const u64 Xi[2]);
|
|
void gcm_gmult_p8(u64 Xi[2], const u128 htable[16]);
|
|
void gcm_ghash_p8(u64 Xi[2], const u128 htable[16],
|
|
const u8 *in, size_t len);
|
|
|
|
struct p8_ghash_ctx {
|
|
/* key used by vector asm */
|
|
u128 htable[16];
|
|
/* key used by software fallback */
|
|
be128 key;
|
|
};
|
|
|
|
struct p8_ghash_desc_ctx {
|
|
u64 shash[2];
|
|
u8 buffer[GHASH_DIGEST_SIZE];
|
|
int bytes;
|
|
};
|
|
|
|
static int p8_ghash_init(struct shash_desc *desc)
|
|
{
|
|
struct p8_ghash_desc_ctx *dctx = shash_desc_ctx(desc);
|
|
|
|
dctx->bytes = 0;
|
|
memset(dctx->shash, 0, GHASH_DIGEST_SIZE);
|
|
return 0;
|
|
}
|
|
|
|
static int p8_ghash_setkey(struct crypto_shash *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct p8_ghash_ctx *ctx = crypto_tfm_ctx(crypto_shash_tfm(tfm));
|
|
|
|
if (keylen != GHASH_BLOCK_SIZE)
|
|
return -EINVAL;
|
|
|
|
preempt_disable();
|
|
pagefault_disable();
|
|
enable_kernel_vsx();
|
|
gcm_init_p8(ctx->htable, (const u64 *) key);
|
|
disable_kernel_vsx();
|
|
pagefault_enable();
|
|
preempt_enable();
|
|
|
|
memcpy(&ctx->key, key, GHASH_BLOCK_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void __ghash_block(struct p8_ghash_ctx *ctx,
|
|
struct p8_ghash_desc_ctx *dctx)
|
|
{
|
|
if (crypto_simd_usable()) {
|
|
preempt_disable();
|
|
pagefault_disable();
|
|
enable_kernel_vsx();
|
|
gcm_ghash_p8(dctx->shash, ctx->htable,
|
|
dctx->buffer, GHASH_DIGEST_SIZE);
|
|
disable_kernel_vsx();
|
|
pagefault_enable();
|
|
preempt_enable();
|
|
} else {
|
|
crypto_xor((u8 *)dctx->shash, dctx->buffer, GHASH_BLOCK_SIZE);
|
|
gf128mul_lle((be128 *)dctx->shash, &ctx->key);
|
|
}
|
|
}
|
|
|
|
static inline void __ghash_blocks(struct p8_ghash_ctx *ctx,
|
|
struct p8_ghash_desc_ctx *dctx,
|
|
const u8 *src, unsigned int srclen)
|
|
{
|
|
if (crypto_simd_usable()) {
|
|
preempt_disable();
|
|
pagefault_disable();
|
|
enable_kernel_vsx();
|
|
gcm_ghash_p8(dctx->shash, ctx->htable,
|
|
src, srclen);
|
|
disable_kernel_vsx();
|
|
pagefault_enable();
|
|
preempt_enable();
|
|
} else {
|
|
while (srclen >= GHASH_BLOCK_SIZE) {
|
|
crypto_xor((u8 *)dctx->shash, src, GHASH_BLOCK_SIZE);
|
|
gf128mul_lle((be128 *)dctx->shash, &ctx->key);
|
|
srclen -= GHASH_BLOCK_SIZE;
|
|
src += GHASH_BLOCK_SIZE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int p8_ghash_update(struct shash_desc *desc,
|
|
const u8 *src, unsigned int srclen)
|
|
{
|
|
unsigned int len;
|
|
struct p8_ghash_ctx *ctx = crypto_tfm_ctx(crypto_shash_tfm(desc->tfm));
|
|
struct p8_ghash_desc_ctx *dctx = shash_desc_ctx(desc);
|
|
|
|
if (dctx->bytes) {
|
|
if (dctx->bytes + srclen < GHASH_DIGEST_SIZE) {
|
|
memcpy(dctx->buffer + dctx->bytes, src,
|
|
srclen);
|
|
dctx->bytes += srclen;
|
|
return 0;
|
|
}
|
|
memcpy(dctx->buffer + dctx->bytes, src,
|
|
GHASH_DIGEST_SIZE - dctx->bytes);
|
|
|
|
__ghash_block(ctx, dctx);
|
|
|
|
src += GHASH_DIGEST_SIZE - dctx->bytes;
|
|
srclen -= GHASH_DIGEST_SIZE - dctx->bytes;
|
|
dctx->bytes = 0;
|
|
}
|
|
len = srclen & ~(GHASH_DIGEST_SIZE - 1);
|
|
if (len) {
|
|
__ghash_blocks(ctx, dctx, src, len);
|
|
src += len;
|
|
srclen -= len;
|
|
}
|
|
if (srclen) {
|
|
memcpy(dctx->buffer, src, srclen);
|
|
dctx->bytes = srclen;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int p8_ghash_final(struct shash_desc *desc, u8 *out)
|
|
{
|
|
int i;
|
|
struct p8_ghash_ctx *ctx = crypto_tfm_ctx(crypto_shash_tfm(desc->tfm));
|
|
struct p8_ghash_desc_ctx *dctx = shash_desc_ctx(desc);
|
|
|
|
if (dctx->bytes) {
|
|
for (i = dctx->bytes; i < GHASH_DIGEST_SIZE; i++)
|
|
dctx->buffer[i] = 0;
|
|
__ghash_block(ctx, dctx);
|
|
dctx->bytes = 0;
|
|
}
|
|
memcpy(out, dctx->shash, GHASH_DIGEST_SIZE);
|
|
return 0;
|
|
}
|
|
|
|
struct shash_alg p8_ghash_alg = {
|
|
.digestsize = GHASH_DIGEST_SIZE,
|
|
.init = p8_ghash_init,
|
|
.update = p8_ghash_update,
|
|
.final = p8_ghash_final,
|
|
.setkey = p8_ghash_setkey,
|
|
.descsize = sizeof(struct p8_ghash_desc_ctx)
|
|
+ sizeof(struct ghash_desc_ctx),
|
|
.base = {
|
|
.cra_name = "ghash",
|
|
.cra_driver_name = "p8_ghash",
|
|
.cra_priority = 1000,
|
|
.cra_blocksize = GHASH_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct p8_ghash_ctx),
|
|
.cra_module = THIS_MODULE,
|
|
},
|
|
};
|