| 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(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"); |