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crypto: sparc/md5 - Use API partial block handling

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Use the Crypto API partial block handling.

Also switch to the generic export format.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-04-18 10:59:11 +08:00
parent 60fded5709
commit cc1f5bbe42
1 changed files with 63 additions and 78 deletions
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141
arch/sparc/crypto/md5_glue.c
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@ -14,121 +14,105 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/md5.h>
#include <asm/pstate.h>
#include <asm/elf.h>
#include <asm/pstate.h>
#include <crypto/internal/hash.h>
#include <crypto/md5.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/unaligned.h>
#include "opcodes.h"
asmlinkage void md5_sparc64_transform(u32 *digest, const char *data,
struct sparc_md5_state {
__le32 hash[MD5_HASH_WORDS];
u64 byte_count;
};
asmlinkage void md5_sparc64_transform(__le32 *digest, const char *data,
unsigned int rounds);
static int md5_sparc64_init(struct shash_desc *desc)
{
struct md5_state *mctx = shash_desc_ctx(desc);
struct sparc_md5_state *mctx = shash_desc_ctx(desc);
mctx->hash[0] = MD5_H0;
mctx->hash[1] = MD5_H1;
mctx->hash[2] = MD5_H2;
mctx->hash[3] = MD5_H3;
le32_to_cpu_array(mctx->hash, 4);
mctx->hash[0] = cpu_to_le32(MD5_H0);
mctx->hash[1] = cpu_to_le32(MD5_H1);
mctx->hash[2] = cpu_to_le32(MD5_H2);
mctx->hash[3] = cpu_to_le32(MD5_H3);
mctx->byte_count = 0;
return 0;
}
static void __md5_sparc64_update(struct md5_state *sctx, const u8 *data,
unsigned int len, unsigned int partial)
{
unsigned int done = 0;
sctx->byte_count += len;
if (partial) {
done = MD5_HMAC_BLOCK_SIZE - partial;
memcpy((u8 *)sctx->block + partial, data, done);
md5_sparc64_transform(sctx->hash, (u8 *)sctx->block, 1);
}
if (len - done >= MD5_HMAC_BLOCK_SIZE) {
const unsigned int rounds = (len - done) / MD5_HMAC_BLOCK_SIZE;
md5_sparc64_transform(sctx->hash, data + done, rounds);
done += rounds * MD5_HMAC_BLOCK_SIZE;
}
memcpy(sctx->block, data + done, len - done);
}
static int md5_sparc64_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct md5_state *sctx = shash_desc_ctx(desc);
unsigned int partial = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
struct sparc_md5_state *sctx = shash_desc_ctx(desc);
/* Handle the fast case right here */
if (partial + len < MD5_HMAC_BLOCK_SIZE) {
sctx->byte_count += len;
memcpy((u8 *)sctx->block + partial, data, len);
} else
__md5_sparc64_update(sctx, data, len, partial);
return 0;
sctx->byte_count += round_down(len, MD5_HMAC_BLOCK_SIZE);
md5_sparc64_transform(sctx->hash, data, len / MD5_HMAC_BLOCK_SIZE);
return len - round_down(len, MD5_HMAC_BLOCK_SIZE);
}
/* Add padding and return the message digest. */
static int md5_sparc64_final(struct shash_desc *desc, u8 *out)
static int md5_sparc64_finup(struct shash_desc *desc, const u8 *src,
unsigned int offset, u8 *out)
{
struct md5_state *sctx = shash_desc_ctx(desc);
unsigned int i, index, padlen;
u32 *dst = (u32 *)out;
__le64 bits;
static const u8 padding[MD5_HMAC_BLOCK_SIZE] = { 0x80, };
struct sparc_md5_state *sctx = shash_desc_ctx(desc);
__le64 block[MD5_BLOCK_WORDS] = {};
u8 *p = memcpy(block, src, offset);
__le32 *dst = (__le32 *)out;
__le64 *pbits;
int i;
bits = cpu_to_le64(sctx->byte_count << 3);
/* Pad out to 56 mod 64 and append length */
index = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
padlen = (index < 56) ? (56 - index) : ((MD5_HMAC_BLOCK_SIZE+56) - index);
/* We need to fill a whole block for __md5_sparc64_update() */
if (padlen <= 56) {
sctx->byte_count += padlen;
memcpy((u8 *)sctx->block + index, padding, padlen);
} else {
__md5_sparc64_update(sctx, padding, padlen, index);
}
__md5_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
src = p;
p += offset;
*p++ = 0x80;
sctx->byte_count += offset;
pbits = &block[(MD5_BLOCK_WORDS / (offset > 55 ? 1 : 2)) - 1];
*pbits = cpu_to_le64(sctx->byte_count << 3);
md5_sparc64_transform(sctx->hash, src, (pbits - block + 1) / 8);
memzero_explicit(block, sizeof(block));
/* Store state in digest */
for (i = 0; i < MD5_HASH_WORDS; i++)
dst[i] = sctx->hash[i];
/* Wipe context */
memset(sctx, 0, sizeof(*sctx));
return 0;
}
static int md5_sparc64_export(struct shash_desc *desc, void *out)
{
struct md5_state *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
struct sparc_md5_state *sctx = shash_desc_ctx(desc);
union {
u8 *u8;
u32 *u32;
u64 *u64;
} p = { .u8 = out };
int i;
for (i = 0; i < MD5_HASH_WORDS; i++)
put_unaligned(le32_to_cpu(sctx->hash[i]), p.u32++);
put_unaligned(sctx->byte_count, p.u64);
return 0;
}
static int md5_sparc64_import(struct shash_desc *desc, const void *in)
{
struct md5_state *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
struct sparc_md5_state *sctx = shash_desc_ctx(desc);
union {
const u8 *u8;
const u32 *u32;
const u64 *u64;
} p = { .u8 = in };
int i;
for (i = 0; i < MD5_HASH_WORDS; i++)
sctx->hash[i] = cpu_to_le32(get_unaligned(p.u32++));
sctx->byte_count = get_unaligned(p.u64);
return 0;
}
@ -136,15 +120,16 @@ static struct shash_alg alg = {
.digestsize = MD5_DIGEST_SIZE,
.init = md5_sparc64_init,
.update = md5_sparc64_update,
.final = md5_sparc64_final,
.finup = md5_sparc64_finup,
.export = md5_sparc64_export,
.import = md5_sparc64_import,
.descsize = sizeof(struct md5_state),
.statesize = sizeof(struct md5_state),
.descsize = sizeof(struct sparc_md5_state),
.statesize = sizeof(struct sparc_md5_state),
.base = {
.cra_name = "md5",
.cra_driver_name= "md5-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}