crypto: sparc/sha1 - Use API partial block handling

#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt

#include <asm/elf.h>

#include <asm/pstate.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/pstate.h>

#include <asm/elf.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include "opcodes.h"

asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,

				       unsigned int rounds);

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);

}

asmlinkage void sha1_sparc64_transform(struct sha1_state *digest,

				       const u8 *data, int rounds);

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;

	return sha1_base_do_update_blocks(desc, data, len,

					  sha1_sparc64_transform);

}

/* 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)

static int sha1_sparc64_finup(struct shash_desc *desc, const u8 *src,

			      unsigned int len, u8 *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;

	sha1_base_do_finup(desc, src, len, sha1_sparc64_transform);

	return sha1_base_finish(desc, out);

}

static struct shash_alg alg = {

	.digestsize	=	SHA1_DIGEST_SIZE,

	.init		=	sha1_base_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),

	.finup		=	sha1_sparc64_finup,

	.descsize	=	SHA1_STATE_SIZE,

	.base		=	{

		.cra_name	=	"sha1",

		.cra_driver_name=	"sha1-sparc64",

		.cra_priority	=	SPARC_CR_OPCODE_PRIORITY,

		.cra_flags	=	CRYPTO_AHASH_ALG_BLOCK_ONLY,

		.cra_blocksize	=	SHA1_BLOCK_SIZE,

		.cra_module	=	THIS_MODULE,

	}