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crypto: s390/sha1 - 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 10:59:34 +08:00
parent 52c7878306
commit 7b83638f96
3 changed files with 93 additions and 16 deletions
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13
arch/s390/crypto/sha.h
View File

@ -10,27 +10,30 @@
#ifndef _CRYPTO_ARCH_S390_SHA_H
#define _CRYPTO_ARCH_S390_SHA_H
#include <linux/crypto.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#include <crypto/sha3.h>
#include <linux/types.h>
/* must be big enough for the largest SHA variant */
#define SHA3_STATE_SIZE 200
#define CPACF_MAX_PARMBLOCK_SIZE SHA3_STATE_SIZE
#define SHA_MAX_BLOCK_SIZE SHA3_224_BLOCK_SIZE
#define S390_SHA_CTX_SIZE offsetof(struct s390_sha_ctx, buf)
struct s390_sha_ctx {
u64 count; /* message length in bytes */
u32 state[CPACF_MAX_PARMBLOCK_SIZE / sizeof(u32)];
u8 buf[SHA_MAX_BLOCK_SIZE];
int func; /* KIMD function to use */
int first_message_part;
bool first_message_part;
u8 buf[SHA_MAX_BLOCK_SIZE];
};
struct shash_desc;
int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len);
int s390_sha_update_blocks(struct shash_desc *desc, const u8 *data,
unsigned int len);
int s390_sha_final(struct shash_desc *desc, u8 *out);
int s390_sha_finup(struct shash_desc *desc, const u8 *src, unsigned int len,
u8 *out);
#endif

22
arch/s390/crypto/sha1_s390.c
View File

@ -18,12 +18,12 @@
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/cpufeature.h>
#include <crypto/sha1.h>
#include <asm/cpacf.h>
#include <crypto/internal/hash.h>
#include <crypto/sha1.h>
#include <linux/cpufeature.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "sha.h"
@ -49,7 +49,6 @@ static int s390_sha1_export(struct shash_desc *desc, void *out)
octx->count = sctx->count;
memcpy(octx->state, sctx->state, sizeof(octx->state));
memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
return 0;
}
@ -60,7 +59,6 @@ static int s390_sha1_import(struct shash_desc *desc, const void *in)
sctx->count = ictx->count;
memcpy(sctx->state, ictx->state, sizeof(ictx->state));
memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
sctx->func = CPACF_KIMD_SHA_1;
return 0;
}
@ -68,16 +66,18 @@ static int s390_sha1_import(struct shash_desc *desc, const void *in)
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = s390_sha1_init,
.update = s390_sha_update,
.final = s390_sha_final,
.update = s390_sha_update_blocks,
.finup = s390_sha_finup,
.export = s390_sha1_export,
.import = s390_sha1_import,
.descsize = sizeof(struct s390_sha_ctx),
.statesize = sizeof(struct sha1_state),
.descsize = S390_SHA_CTX_SIZE,
.statesize = SHA1_STATE_SIZE,
.base = {
.cra_name = "sha1",
.cra_driver_name= "sha1-s390",
.cra_priority = 300,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY |
CRYPTO_AHASH_ALG_FINUP_MAX,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}

74
arch/s390/crypto/sha_common.c
View File

@ -58,6 +58,27 @@ int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len)
}
EXPORT_SYMBOL_GPL(s390_sha_update);
int s390_sha_update_blocks(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
unsigned int bsize = crypto_shash_blocksize(desc->tfm);
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
unsigned int n;
int fc;
fc = ctx->func;
if (ctx->first_message_part)
fc |= test_facility(86) ? CPACF_KIMD_NIP : 0;
/* process as many blocks as possible */
n = (len / bsize) * bsize;
ctx->count += n;
cpacf_kimd(fc, ctx->state, data, n);
ctx->first_message_part = 0;
return len - n;
}
EXPORT_SYMBOL_GPL(s390_sha_update_blocks);
static int s390_crypto_shash_parmsize(int func)
{
switch (func) {
@ -132,5 +153,58 @@ int s390_sha_final(struct shash_desc *desc, u8 *out)
}
EXPORT_SYMBOL_GPL(s390_sha_final);
int s390_sha_finup(struct shash_desc *desc, const u8 *src, unsigned int len,
u8 *out)
{
struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
int mbl_offset, fc;
u64 bits;
ctx->count += len;
bits = ctx->count * 8;
mbl_offset = s390_crypto_shash_parmsize(ctx->func);
if (mbl_offset < 0)
return -EINVAL;
mbl_offset = mbl_offset / sizeof(u32);
/* set total msg bit length (mbl) in CPACF parmblock */
switch (ctx->func) {
case CPACF_KLMD_SHA_1:
case CPACF_KLMD_SHA_256:
memcpy(ctx->state + mbl_offset, &bits, sizeof(bits));
break;
case CPACF_KLMD_SHA_512:
/*
* the SHA512 parmblock has a 128-bit mbl field, clear
* high-order u64 field, copy bits to low-order u64 field
*/
memset(ctx->state + mbl_offset, 0x00, sizeof(bits));
mbl_offset += sizeof(u64) / sizeof(u32);
memcpy(ctx->state + mbl_offset, &bits, sizeof(bits));
break;
case CPACF_KLMD_SHA3_224:
case CPACF_KLMD_SHA3_256:
case CPACF_KLMD_SHA3_384:
case CPACF_KLMD_SHA3_512:
break;
default:
return -EINVAL;
}
fc = ctx->func;
fc |= test_facility(86) ? CPACF_KLMD_DUFOP : 0;
if (ctx->first_message_part)
fc |= CPACF_KLMD_NIP;
cpacf_klmd(fc, ctx->state, src, len);
/* copy digest to out */
memcpy(out, ctx->state, crypto_shash_digestsize(desc->tfm));
return 0;
}
EXPORT_SYMBOL_GPL(s390_sha_finup);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("s390 SHA cipher common functions");