182 строки
4.4 KiB
C
182 строки
4.4 KiB
C
|
/* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
|
||
|
*
|
||
|
* This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
|
||
|
*
|
||
|
* Copyright (c) Alan Smithee.
|
||
|
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
|
||
|
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
|
||
|
* Copyright (c) Mathias Krause <minipli@googlemail.com>
|
||
|
*/
|
||
|
|
||
|
#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/cryptohash.h>
|
||
|
#include <linux/types.h>
|
||
|
#include <crypto/sha.h>
|
||
|
|
||
|
#include <asm/pstate.h>
|
||
|
#include <asm/elf.h>
|
||
|
|
||
|
asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,
|
||
|
unsigned int rounds);
|
||
|
|
||
|
static int sha1_sparc64_init(struct shash_desc *desc)
|
||
|
{
|
||
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||
|
|
||
|
*sctx = (struct sha1_state){
|
||
|
.state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
|
||
|
};
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data,
|
||
|
unsigned int len, unsigned int partial)
|
||
|
{
|
||
|
unsigned int done = 0;
|
||
|
|
||
|
sctx->count += len;
|
||
|
if (partial) {
|
||
|
done = SHA1_BLOCK_SIZE - partial;
|
||
|
memcpy(sctx->buffer + partial, data, done);
|
||
|
sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
|
||
|
}
|
||
|
if (len - done >= SHA1_BLOCK_SIZE) {
|
||
|
const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
|
||
|
|
||
|
sha1_sparc64_transform(sctx->state, data + done, rounds);
|
||
|
done += rounds * SHA1_BLOCK_SIZE;
|
||
|
}
|
||
|
|
||
|
memcpy(sctx->buffer, data + done, len - done);
|
||
|
}
|
||
|
|
||
|
static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
|
||
|
unsigned int len)
|
||
|
{
|
||
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||
|
unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
|
||
|
|
||
|
/* Handle the fast case right here */
|
||
|
if (partial + len < SHA1_BLOCK_SIZE) {
|
||
|
sctx->count += len;
|
||
|
memcpy(sctx->buffer + partial, data, len);
|
||
|
} else
|
||
|
__sha1_sparc64_update(sctx, data, len, partial);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/* Add padding and return the message digest. */
|
||
|
static int sha1_sparc64_final(struct shash_desc *desc, u8 *out)
|
||
|
{
|
||
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||
|
unsigned int i, index, padlen;
|
||
|
__be32 *dst = (__be32 *)out;
|
||
|
__be64 bits;
|
||
|
static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
|
||
|
|
||
|
bits = cpu_to_be64(sctx->count << 3);
|
||
|
|
||
|
/* Pad out to 56 mod 64 and append length */
|
||
|
index = sctx->count % SHA1_BLOCK_SIZE;
|
||
|
padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
|
||
|
|
||
|
/* We need to fill a whole block for __sha1_sparc64_update() */
|
||
|
if (padlen <= 56) {
|
||
|
sctx->count += padlen;
|
||
|
memcpy(sctx->buffer + index, padding, padlen);
|
||
|
} else {
|
||
|
__sha1_sparc64_update(sctx, padding, padlen, index);
|
||
|
}
|
||
|
__sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
|
||
|
|
||
|
/* Store state in digest */
|
||
|
for (i = 0; i < 5; i++)
|
||
|
dst[i] = cpu_to_be32(sctx->state[i]);
|
||
|
|
||
|
/* Wipe context */
|
||
|
memset(sctx, 0, sizeof(*sctx));
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int sha1_sparc64_export(struct shash_desc *desc, void *out)
|
||
|
{
|
||
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||
|
|
||
|
memcpy(out, sctx, sizeof(*sctx));
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int sha1_sparc64_import(struct shash_desc *desc, const void *in)
|
||
|
{
|
||
|
struct sha1_state *sctx = shash_desc_ctx(desc);
|
||
|
|
||
|
memcpy(sctx, in, sizeof(*sctx));
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static struct shash_alg alg = {
|
||
|
.digestsize = SHA1_DIGEST_SIZE,
|
||
|
.init = sha1_sparc64_init,
|
||
|
.update = sha1_sparc64_update,
|
||
|
.final = sha1_sparc64_final,
|
||
|
.export = sha1_sparc64_export,
|
||
|
.import = sha1_sparc64_import,
|
||
|
.descsize = sizeof(struct sha1_state),
|
||
|
.statesize = sizeof(struct sha1_state),
|
||
|
.base = {
|
||
|
.cra_name = "sha1",
|
||
|
.cra_driver_name= "sha1-sparc64",
|
||
|
.cra_priority = 150,
|
||
|
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
|
||
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
||
|
.cra_module = THIS_MODULE,
|
||
|
}
|
||
|
};
|
||
|
|
||
|
static bool __init sparc64_has_sha1_opcode(void)
|
||
|
{
|
||
|
unsigned long cfr;
|
||
|
|
||
|
if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
|
||
|
return false;
|
||
|
|
||
|
__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
|
||
|
if (!(cfr & CFR_SHA1))
|
||
|
return false;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
static int __init sha1_sparc64_mod_init(void)
|
||
|
{
|
||
|
if (sparc64_has_sha1_opcode()) {
|
||
|
pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
|
||
|
return crypto_register_shash(&alg);
|
||
|
}
|
||
|
pr_info("sparc64 sha1 opcode not available.\n");
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
static void __exit sha1_sparc64_mod_fini(void)
|
||
|
{
|
||
|
crypto_unregister_shash(&alg);
|
||
|
}
|
||
|
|
||
|
module_init(sha1_sparc64_mod_init);
|
||
|
module_exit(sha1_sparc64_mod_fini);
|
||
|
|
||
|
MODULE_LICENSE("GPL");
|
||
|
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
|
||
|
|
||
|
MODULE_ALIAS("sha1");
|