arch/s390/crypto/sha512_s390.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Cryptographic API.
   4  *
   5  * s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
   6  *
   7  * Copyright IBM Corp. 2007
   8  * Author(s): Jan Glauber (jang@de.ibm.com)
   9  */
  10 #include <crypto/internal/hash.h>
  11 #include <crypto/sha2.h>
  12 #include <linux/errno.h>
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/cpufeature.h>
  17 #include <asm/cpacf.h>
  18
  19 #include "sha.h"
  20
  21 static int sha512_init(struct shash_desc *desc)
  22 {
  23         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
  24
  25         *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
  26         *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
  27         *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
  28         *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
  29         *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
  30         *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
  31         *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
  32         *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
  33         ctx->count = 0;
  34         ctx->func = CPACF_KIMD_SHA_512;
  35
  36         return 0;
  37 }
  38
  39 static int sha512_export(struct shash_desc *desc, void *out)
  40 {
  41         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  42         struct sha512_state *octx = out;
  43
  44         octx->count[0] = sctx->count;
  45         octx->count[1] = 0;
  46         memcpy(octx->state, sctx->state, sizeof(octx->state));
  47         memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
  48         return 0;
  49 }
  50
  51 static int sha512_import(struct shash_desc *desc, const void *in)
  52 {
  53         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  54         const struct sha512_state *ictx = in;
  55
  56         if (unlikely(ictx->count[1]))
  57                 return -ERANGE;
  58         sctx->count = ictx->count[0];
  59
  60         memcpy(sctx->state, ictx->state, sizeof(ictx->state));
  61         memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
  62         sctx->func = CPACF_KIMD_SHA_512;
  63         return 0;
  64 }
  65
  66 static struct shash_alg sha512_alg = {
  67         .digestsize     =       SHA512_DIGEST_SIZE,
  68         .init           =       sha512_init,
  69         .update         =       s390_sha_update,
  70         .final          =       s390_sha_final,
  71         .export         =       sha512_export,
  72         .import         =       sha512_import,
  73         .descsize       =       sizeof(struct s390_sha_ctx),
  74         .statesize      =       sizeof(struct sha512_state),
  75         .base           =       {
  76                 .cra_name       =       "sha512",
  77                 .cra_driver_name=       "sha512-s390",
  78                 .cra_priority   =       300,
  79                 .cra_blocksize  =       SHA512_BLOCK_SIZE,
  80                 .cra_module     =       THIS_MODULE,
  81         }
  82 };
  83
  84 MODULE_ALIAS_CRYPTO("sha512");
  85
  86 static int sha384_init(struct shash_desc *desc)
  87 {
  88         struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
  89
  90         *(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL;
  91         *(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL;
  92         *(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL;
  93         *(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL;
  94         *(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL;
  95         *(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL;
  96         *(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL;
  97         *(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL;
  98         ctx->count = 0;
  99         ctx->func = CPACF_KIMD_SHA_512;
 100
 101         return 0;
 102 }
 103
 104 static struct shash_alg sha384_alg = {
 105         .digestsize     =       SHA384_DIGEST_SIZE,
 106         .init           =       sha384_init,
 107         .update         =       s390_sha_update,
 108         .final          =       s390_sha_final,
 109         .export         =       sha512_export,
 110         .import         =       sha512_import,
 111         .descsize       =       sizeof(struct s390_sha_ctx),
 112         .statesize      =       sizeof(struct sha512_state),
 113         .base           =       {
 114                 .cra_name       =       "sha384",
 115                 .cra_driver_name=       "sha384-s390",
 116                 .cra_priority   =       300,
 117                 .cra_blocksize  =       SHA384_BLOCK_SIZE,
 118                 .cra_ctxsize    =       sizeof(struct s390_sha_ctx),
 119                 .cra_module     =       THIS_MODULE,
 120         }
 121 };
 122
 123 MODULE_ALIAS_CRYPTO("sha384");
 124
 125 static int __init init(void)
 126 {
 127         int ret;
 128
 129         if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
 130                 return -ENODEV;
 131         if ((ret = crypto_register_shash(&sha512_alg)) < 0)
 132                 goto out;
 133         if ((ret = crypto_register_shash(&sha384_alg)) < 0)
 134                 crypto_unregister_shash(&sha512_alg);
 135 out:
 136         return ret;
 137 }
 138
 139 static void __exit fini(void)
 140 {
 141         crypto_unregister_shash(&sha512_alg);
 142         crypto_unregister_shash(&sha384_alg);
 143 }
 144
 145 module_cpu_feature_match(MSA, init);
 146 module_exit(fini);
 147
 148 MODULE_LICENSE("GPL");
 149 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");