arch/s390/crypto/sha512_s390.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
   5  *
   6  * Copyright IBM Corp. 2007
   7  * Author(s): Jan Glauber (jang@de.ibm.com)
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  */
  15 #include <crypto/internal/hash.h>
  16 #include <crypto/sha.h>
  17 #include <linux/errno.h>
  18 #include <linux/init.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/cpufeature.h>
  22 #include <asm/cpacf.h>
  23
  24 #include "sha.h"
  25
  26 static int sha512_init(struct shash_desc *desc)
  27 {
  28         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
  29
  30         *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
  31         *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
  32         *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
  33         *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
  34         *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
  35         *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
  36         *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
  37         *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
  38         ctx->count = 0;
  39         ctx->func = CPACF_KIMD_SHA_512;
  40
  41         return 0;
  42 }
  43
  44 static int sha512_export(struct shash_desc *desc, void *out)
  45 {
  46         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  47         struct sha512_state *octx = out;
  48
  49         octx->count[0] = sctx->count;
  50         octx->count[1] = 0;
  51         memcpy(octx->state, sctx->state, sizeof(octx->state));
  52         memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
  53         return 0;
  54 }
  55
  56 static int sha512_import(struct shash_desc *desc, const void *in)
  57 {
  58         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  59         const struct sha512_state *ictx = in;
  60
  61         if (unlikely(ictx->count[1]))
  62                 return -ERANGE;
  63         sctx->count = ictx->count[0];
  64
  65         memcpy(sctx->state, ictx->state, sizeof(ictx->state));
  66         memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
  67         sctx->func = CPACF_KIMD_SHA_512;
  68         return 0;
  69 }
  70
  71 static struct shash_alg sha512_alg = {
  72         .digestsize     =       SHA512_DIGEST_SIZE,
  73         .init           =       sha512_init,
  74         .update         =       s390_sha_update,
  75         .final          =       s390_sha_final,
  76         .export         =       sha512_export,
  77         .import         =       sha512_import,
  78         .descsize       =       sizeof(struct s390_sha_ctx),
  79         .statesize      =       sizeof(struct sha512_state),
  80         .base           =       {
  81                 .cra_name       =       "sha512",
  82                 .cra_driver_name=       "sha512-s390",
  83                 .cra_priority   =       300,
  84                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
  85                 .cra_blocksize  =       SHA512_BLOCK_SIZE,
  86                 .cra_module     =       THIS_MODULE,
  87         }
  88 };
  89
  90 MODULE_ALIAS_CRYPTO("sha512");
  91
  92 static int sha384_init(struct shash_desc *desc)
  93 {
  94         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
  95
  96         *(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
  97         *(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
  98         *(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
  99         *(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
 100         *(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
 101         *(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
 102         *(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
 103         *(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
 104         ctx->count = 0;
 105         ctx->func = CPACF_KIMD_SHA_512;
 106
 107         return 0;
 108 }
 109
 110 static struct shash_alg sha384_alg = {
 111         .digestsize     =       SHA384_DIGEST_SIZE,
 112         .init           =       sha384_init,
 113         .update         =       s390_sha_update,
 114         .final          =       s390_sha_final,
 115         .export         =       sha512_export,
 116         .import         =       sha512_import,
 117         .descsize       =       sizeof(struct s390_sha_ctx),
 118         .statesize      =       sizeof(struct sha512_state),
 119         .base           =       {
 120                 .cra_name       =       "sha384",
 121                 .cra_driver_name=       "sha384-s390",
 122                 .cra_priority   =       300,
 123                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
 124                 .cra_blocksize  =       SHA384_BLOCK_SIZE,
 125                 .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
 126                 .cra_module     =       THIS_MODULE,
 127         }
 128 };
 129
 130 MODULE_ALIAS_CRYPTO("sha384");
 131
 132 static int __init init(void)
 133 {
 134         int ret;
 135
 136         if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
 137                 return -EOPNOTSUPP;
 138         if ((ret = crypto_register_shash(&sha512_alg)) < 0)
 139                 goto out;
 140         if ((ret = crypto_register_shash(&sha384_alg)) < 0)
 141                 crypto_unregister_shash(&sha512_alg);
 142 out:
 143         return ret;
 144 }
 145
 146 static void __exit fini(void)
 147 {
 148         crypto_unregister_shash(&sha512_alg);
 149         crypto_unregister_shash(&sha384_alg);
 150 }
 151
 152 module_cpu_feature_match(MSA, init);
 153 module_exit(fini);
 154
 155 MODULE_LICENSE("GPL");
 156 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");