LXR linux/arch/s390/crypto/sha1

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Cryptographic API.
   4 *
   5 * s390 implementation of the SHA1 Secure Hash Algorithm.
   6 *
   7 * Derived from cryptoapi implementation, adapted for in-place
   8 * scatterlist interface.  Originally based on the public domain
   9 * implementation written by Steve Reid.
  10 *
  11 * s390 Version:
  12 *   Copyright IBM Corp. 2003, 2007
  13 *   Author(s): Thomas Spatzier
  14 *              Jan Glauber (jan.glauber@de.ibm.com)
  15 *
  16 * Derived from "crypto/sha1_generic.c"
  17 *   Copyright (c) Alan Smithee.
  18 *   Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
  19 *   Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
  20 */
  21#include <crypto/internal/hash.h>
  22#include <linux/init.h>
  23#include <linux/module.h>
  24#include <linux/cpufeature.h>
  25#include <crypto/sha1.h>
  26#include <asm/cpacf.h>
  27
  28#include "sha.h"
  29
  30static int s390_sha1_init(struct shash_desc *desc)
  31{
  32        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  33
  34        sctx->state[0] = SHA1_H0;
  35        sctx->state[1] = SHA1_H1;
  36        sctx->state[2] = SHA1_H2;
  37        sctx->state[3] = SHA1_H3;
  38        sctx->state[4] = SHA1_H4;
  39        sctx->count = 0;
  40        sctx->func = CPACF_KIMD_SHA_1;
  41
  42        return 0;
  43}
  44
  45static int s390_sha1_export(struct shash_desc *desc, void *out)
  46{
  47        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  48        struct sha1_state *octx = out;
  49
  50        octx->count = sctx->count;
  51        memcpy(octx->state, sctx->state, sizeof(octx->state));
  52        memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
  53        return 0;
  54}
  55
  56static int s390_sha1_import(struct shash_desc *desc, const void *in)
  57{
  58        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  59        const struct sha1_state *ictx = in;
  60
  61        sctx->count = ictx->count;
  62        memcpy(sctx->state, ictx->state, sizeof(ictx->state));
  63        memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
  64        sctx->func = CPACF_KIMD_SHA_1;
  65        return 0;
  66}
  67
  68static struct shash_alg alg = {
  69        .digestsize     =       SHA1_DIGEST_SIZE,
  70        .init           =       s390_sha1_init,
  71        .update         =       s390_sha_update,
  72        .final          =       s390_sha_final,
  73        .export         =       s390_sha1_export,
  74        .import         =       s390_sha1_import,
  75        .descsize       =       sizeof(struct s390_sha_ctx),
  76        .statesize      =       sizeof(struct sha1_state),
  77        .base           =       {
  78                .cra_name       =       "sha1",
  79                .cra_driver_name=       "sha1-s390",
  80                .cra_priority   =       300,
  81                .cra_blocksize  =       SHA1_BLOCK_SIZE,
  82                .cra_module     =       THIS_MODULE,
  83        }
  84};
  85
  86static int __init sha1_s390_init(void)
  87{
  88        if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1))
  89                return -ENODEV;
  90        return crypto_register_shash(&alg);
  91}
  92
  93static void __exit sha1_s390_fini(void)
  94{
  95        crypto_unregister_shash(&alg);
  96}
  97
  98module_cpu_feature_match(MSA, sha1_s390_init);
  99module_exit(sha1_s390_fini);
 100
 101MODULE_ALIAS_CRYPTO("sha1");
 102MODULE_LICENSE("GPL");
 103MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
 104