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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 11 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520170858.370933192@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
272 lines
7.2 KiB
C
272 lines
7.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Cryptographic API.
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*
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* SHA-512 and SHA-384 Secure Hash Algorithm.
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*
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* Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
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*
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* Based on crypto/sha512_generic.c, which is:
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*
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* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
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*/
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#include <linux/mm.h>
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#include <crypto/sha.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <asm/byteorder.h>
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#include <asm/octeon/octeon.h>
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#include <crypto/internal/hash.h>
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#include "octeon-crypto.h"
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/*
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* We pass everything as 64-bit. OCTEON can handle misaligned data.
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*/
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static void octeon_sha512_store_hash(struct sha512_state *sctx)
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{
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write_octeon_64bit_hash_sha512(sctx->state[0], 0);
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write_octeon_64bit_hash_sha512(sctx->state[1], 1);
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write_octeon_64bit_hash_sha512(sctx->state[2], 2);
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write_octeon_64bit_hash_sha512(sctx->state[3], 3);
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write_octeon_64bit_hash_sha512(sctx->state[4], 4);
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write_octeon_64bit_hash_sha512(sctx->state[5], 5);
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write_octeon_64bit_hash_sha512(sctx->state[6], 6);
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write_octeon_64bit_hash_sha512(sctx->state[7], 7);
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}
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static void octeon_sha512_read_hash(struct sha512_state *sctx)
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{
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sctx->state[0] = read_octeon_64bit_hash_sha512(0);
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sctx->state[1] = read_octeon_64bit_hash_sha512(1);
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sctx->state[2] = read_octeon_64bit_hash_sha512(2);
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sctx->state[3] = read_octeon_64bit_hash_sha512(3);
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sctx->state[4] = read_octeon_64bit_hash_sha512(4);
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sctx->state[5] = read_octeon_64bit_hash_sha512(5);
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sctx->state[6] = read_octeon_64bit_hash_sha512(6);
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sctx->state[7] = read_octeon_64bit_hash_sha512(7);
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}
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static void octeon_sha512_transform(const void *_block)
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{
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const u64 *block = _block;
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write_octeon_64bit_block_sha512(block[0], 0);
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write_octeon_64bit_block_sha512(block[1], 1);
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write_octeon_64bit_block_sha512(block[2], 2);
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write_octeon_64bit_block_sha512(block[3], 3);
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write_octeon_64bit_block_sha512(block[4], 4);
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write_octeon_64bit_block_sha512(block[5], 5);
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write_octeon_64bit_block_sha512(block[6], 6);
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write_octeon_64bit_block_sha512(block[7], 7);
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write_octeon_64bit_block_sha512(block[8], 8);
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write_octeon_64bit_block_sha512(block[9], 9);
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write_octeon_64bit_block_sha512(block[10], 10);
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write_octeon_64bit_block_sha512(block[11], 11);
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write_octeon_64bit_block_sha512(block[12], 12);
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write_octeon_64bit_block_sha512(block[13], 13);
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write_octeon_64bit_block_sha512(block[14], 14);
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octeon_sha512_start(block[15]);
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}
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static int octeon_sha512_init(struct shash_desc *desc)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA512_H0;
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sctx->state[1] = SHA512_H1;
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sctx->state[2] = SHA512_H2;
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sctx->state[3] = SHA512_H3;
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sctx->state[4] = SHA512_H4;
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sctx->state[5] = SHA512_H5;
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sctx->state[6] = SHA512_H6;
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sctx->state[7] = SHA512_H7;
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sctx->count[0] = sctx->count[1] = 0;
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return 0;
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}
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static int octeon_sha384_init(struct shash_desc *desc)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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sctx->state[0] = SHA384_H0;
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sctx->state[1] = SHA384_H1;
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sctx->state[2] = SHA384_H2;
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sctx->state[3] = SHA384_H3;
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sctx->state[4] = SHA384_H4;
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sctx->state[5] = SHA384_H5;
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sctx->state[6] = SHA384_H6;
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sctx->state[7] = SHA384_H7;
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sctx->count[0] = sctx->count[1] = 0;
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return 0;
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}
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static void __octeon_sha512_update(struct sha512_state *sctx, const u8 *data,
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unsigned int len)
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{
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unsigned int part_len;
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unsigned int index;
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unsigned int i;
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/* Compute number of bytes mod 128. */
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index = sctx->count[0] % SHA512_BLOCK_SIZE;
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/* Update number of bytes. */
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if ((sctx->count[0] += len) < len)
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sctx->count[1]++;
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part_len = SHA512_BLOCK_SIZE - index;
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/* Transform as many times as possible. */
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if (len >= part_len) {
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memcpy(&sctx->buf[index], data, part_len);
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octeon_sha512_transform(sctx->buf);
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for (i = part_len; i + SHA512_BLOCK_SIZE <= len;
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i += SHA512_BLOCK_SIZE)
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octeon_sha512_transform(&data[i]);
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index = 0;
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} else {
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i = 0;
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}
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/* Buffer remaining input. */
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memcpy(&sctx->buf[index], &data[i], len - i);
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}
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static int octeon_sha512_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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struct octeon_cop2_state state;
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unsigned long flags;
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/*
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* Small updates never reach the crypto engine, so the generic sha512 is
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* faster because of the heavyweight octeon_crypto_enable() /
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* octeon_crypto_disable().
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*/
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if ((sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
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return crypto_sha512_update(desc, data, len);
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flags = octeon_crypto_enable(&state);
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octeon_sha512_store_hash(sctx);
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__octeon_sha512_update(sctx, data, len);
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octeon_sha512_read_hash(sctx);
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octeon_crypto_disable(&state, flags);
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return 0;
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}
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static int octeon_sha512_final(struct shash_desc *desc, u8 *hash)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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static u8 padding[128] = { 0x80, };
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struct octeon_cop2_state state;
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__be64 *dst = (__be64 *)hash;
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unsigned int pad_len;
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unsigned long flags;
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unsigned int index;
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__be64 bits[2];
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int i;
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/* Save number of bits. */
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bits[1] = cpu_to_be64(sctx->count[0] << 3);
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bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
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/* Pad out to 112 mod 128. */
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index = sctx->count[0] & 0x7f;
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pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
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flags = octeon_crypto_enable(&state);
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octeon_sha512_store_hash(sctx);
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__octeon_sha512_update(sctx, padding, pad_len);
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/* Append length (before padding). */
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__octeon_sha512_update(sctx, (const u8 *)bits, sizeof(bits));
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octeon_sha512_read_hash(sctx);
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octeon_crypto_disable(&state, flags);
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/* Store state in digest. */
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for (i = 0; i < 8; i++)
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dst[i] = cpu_to_be64(sctx->state[i]);
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/* Zeroize sensitive information. */
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memset(sctx, 0, sizeof(struct sha512_state));
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return 0;
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}
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static int octeon_sha384_final(struct shash_desc *desc, u8 *hash)
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{
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u8 D[64];
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octeon_sha512_final(desc, D);
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memcpy(hash, D, 48);
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memzero_explicit(D, 64);
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return 0;
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}
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static struct shash_alg octeon_sha512_algs[2] = { {
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.digestsize = SHA512_DIGEST_SIZE,
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.init = octeon_sha512_init,
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.update = octeon_sha512_update,
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.final = octeon_sha512_final,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha512",
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.cra_driver_name= "octeon-sha512",
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.cra_priority = OCTEON_CR_OPCODE_PRIORITY,
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.cra_blocksize = SHA512_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.digestsize = SHA384_DIGEST_SIZE,
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.init = octeon_sha384_init,
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.update = octeon_sha512_update,
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.final = octeon_sha384_final,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha384",
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.cra_driver_name= "octeon-sha384",
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.cra_priority = OCTEON_CR_OPCODE_PRIORITY,
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.cra_blocksize = SHA384_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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} };
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static int __init octeon_sha512_mod_init(void)
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{
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if (!octeon_has_crypto())
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return -ENOTSUPP;
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return crypto_register_shashes(octeon_sha512_algs,
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ARRAY_SIZE(octeon_sha512_algs));
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}
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static void __exit octeon_sha512_mod_fini(void)
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{
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crypto_unregister_shashes(octeon_sha512_algs,
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ARRAY_SIZE(octeon_sha512_algs));
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}
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module_init(octeon_sha512_mod_init);
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module_exit(octeon_sha512_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms (OCTEON)");
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MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
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