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Revision 7036440eab3e2d47a775d4616909f8235488d714 authored by Arnd Bergmann on 30 May 2022, 12:46:17 UTC, committed by Arnd Bergmann on 03 June 2022, 18:48:53 UTC 
ARM: omap1: enable multiplatform
 
With all the header files out of the way, and the clock driver
converted to the common framework, nothing stops us from building
OMAP together with the other platforms.

As usual, the decompressor support is a victim here, and is
only available when CONFIG_DEBUG_LL is configured for the
particular board.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
1 parent c73b909
Raw File
sha512_base.h 
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * sha512_base.h - core logic for SHA-512 implementations
 *
 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
 */

#ifndef _CRYPTO_SHA512_BASE_H
#define _CRYPTO_SHA512_BASE_H

#include <crypto/internal/hash.h>
#include <crypto/sha2.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/string.h>

#include <asm/unaligned.h>

typedef void (sha512_block_fn)(struct sha512_state *sst, u8 const *src,
			       int blocks);

static inline int sha384_base_init(struct shash_desc *desc)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA384_H0;
	sctx->state[1] = SHA384_H1;
	sctx->state[2] = SHA384_H2;
	sctx->state[3] = SHA384_H3;
	sctx->state[4] = SHA384_H4;
	sctx->state[5] = SHA384_H5;
	sctx->state[6] = SHA384_H6;
	sctx->state[7] = SHA384_H7;
	sctx->count[0] = sctx->count[1] = 0;

	return 0;
}

static inline int sha512_base_init(struct shash_desc *desc)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);

	sctx->state[0] = SHA512_H0;
	sctx->state[1] = SHA512_H1;
	sctx->state[2] = SHA512_H2;
	sctx->state[3] = SHA512_H3;
	sctx->state[4] = SHA512_H4;
	sctx->state[5] = SHA512_H5;
	sctx->state[6] = SHA512_H6;
	sctx->state[7] = SHA512_H7;
	sctx->count[0] = sctx->count[1] = 0;

	return 0;
}

static inline int sha512_base_do_update(struct shash_desc *desc,
					const u8 *data,
					unsigned int len,
					sha512_block_fn *block_fn)
{
	struct sha512_state *sctx = shash_desc_ctx(desc);
	unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;

	sctx->count[0] += len;
	if (sctx->count[0] < len)
		sctx->count[1]++;

	if (unlikely((partial + len) >= SHA512_BLOCK_SIZE)) {
		int blocks;

		if (partial) {
			int p = SHA512_BLOCK_SIZE - partial;

			memcpy(sctx->buf + partial, data, p);
			data += p;
			len -= p;

			block_fn(sctx, sctx->buf, 1);
		}

		blocks = len / SHA512_BLOCK_SIZE;
		len %= SHA512_BLOCK_SIZE;

		if (blocks) {
			block_fn(sctx, data, blocks);
			data += blocks * SHA512_BLOCK_SIZE;
		}
		partial = 0;
	}
	if (len)
		memcpy(sctx->buf + partial, data, len);

	return 0;
}

static inline int sha512_base_do_finalize(struct shash_desc *desc,
					  sha512_block_fn *block_fn)
{
	const int bit_offset = SHA512_BLOCK_SIZE - sizeof(__be64[2]);
	struct sha512_state *sctx = shash_desc_ctx(desc);
	__be64 *bits = (__be64 *)(sctx->buf + bit_offset);
	unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;

	sctx->buf[partial++] = 0x80;
	if (partial > bit_offset) {
		memset(sctx->buf + partial, 0x0, SHA512_BLOCK_SIZE - partial);
		partial = 0;

		block_fn(sctx, sctx->buf, 1);
	}

	memset(sctx->buf + partial, 0x0, bit_offset - partial);
	bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
	bits[1] = cpu_to_be64(sctx->count[0] << 3);
	block_fn(sctx, sctx->buf, 1);

	return 0;
}

static inline int sha512_base_finish(struct shash_desc *desc, u8 *out)
{
	unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
	struct sha512_state *sctx = shash_desc_ctx(desc);
	__be64 *digest = (__be64 *)out;
	int i;

	for (i = 0; digest_size > 0; i++, digest_size -= sizeof(__be64))
		put_unaligned_be64(sctx->state[i], digest++);

	memzero_explicit(sctx, sizeof(*sctx));
	return 0;
}

#endif /* _CRYPTO_SHA512_BASE_H */
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