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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 of the license 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 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
153 lines
3.3 KiB
C
153 lines
3.3 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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* powerpc implementation of the SHA1 Secure Hash Algorithm.
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*
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* Derived from cryptoapi implementation, adapted for in-place
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* scatterlist interface.
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*
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* Derived from "crypto/sha1.c"
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <crypto/sha.h>
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#include <asm/byteorder.h>
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extern void powerpc_sha_transform(u32 *state, const u8 *src, u32 *temp);
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static int sha1_init(struct shash_desc *desc)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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*sctx = (struct sha1_state){
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.state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
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};
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return 0;
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}
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static int sha1_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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unsigned int partial, done;
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const u8 *src;
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partial = sctx->count & 0x3f;
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sctx->count += len;
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done = 0;
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src = data;
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if ((partial + len) > 63) {
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u32 temp[SHA_WORKSPACE_WORDS];
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if (partial) {
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done = -partial;
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memcpy(sctx->buffer + partial, data, done + 64);
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src = sctx->buffer;
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}
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do {
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powerpc_sha_transform(sctx->state, src, temp);
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done += 64;
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src = data + done;
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} while (done + 63 < len);
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memzero_explicit(temp, sizeof(temp));
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partial = 0;
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}
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memcpy(sctx->buffer + partial, src, len - done);
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return 0;
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}
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/* Add padding and return the message digest. */
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static int sha1_final(struct shash_desc *desc, u8 *out)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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__be32 *dst = (__be32 *)out;
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u32 i, index, padlen;
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__be64 bits;
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static const u8 padding[64] = { 0x80, };
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bits = cpu_to_be64(sctx->count << 3);
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/* Pad out to 56 mod 64 */
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index = sctx->count & 0x3f;
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padlen = (index < 56) ? (56 - index) : ((64+56) - index);
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sha1_update(desc, padding, padlen);
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/* Append length */
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sha1_update(desc, (const u8 *)&bits, sizeof(bits));
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/* Store state in digest */
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for (i = 0; i < 5; i++)
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dst[i] = cpu_to_be32(sctx->state[i]);
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/* Wipe context */
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memset(sctx, 0, sizeof *sctx);
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return 0;
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}
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static int sha1_export(struct shash_desc *desc, void *out)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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memcpy(out, sctx, sizeof(*sctx));
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return 0;
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}
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static int sha1_import(struct shash_desc *desc, const void *in)
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{
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struct sha1_state *sctx = shash_desc_ctx(desc);
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memcpy(sctx, in, sizeof(*sctx));
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return 0;
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}
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static struct shash_alg alg = {
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.digestsize = SHA1_DIGEST_SIZE,
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.init = sha1_init,
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.update = sha1_update,
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.final = sha1_final,
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.export = sha1_export,
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.import = sha1_import,
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.descsize = sizeof(struct sha1_state),
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.statesize = sizeof(struct sha1_state),
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.base = {
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.cra_name = "sha1",
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.cra_driver_name= "sha1-powerpc",
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.cra_blocksize = SHA1_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 sha1_powerpc_mod_init(void)
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{
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return crypto_register_shash(&alg);
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}
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static void __exit sha1_powerpc_mod_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_init(sha1_powerpc_mod_init);
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module_exit(sha1_powerpc_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
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MODULE_ALIAS_CRYPTO("sha1");
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MODULE_ALIAS_CRYPTO("sha1-powerpc");
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