| 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm. |
| 5 | * |
| 6 | * s390 Version: |
| 7 | * Copyright IBM Corp. 2005, 2011 |
| 8 | * Author(s): Jan Glauber (jang@de.ibm.com) |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the Free |
| 12 | * Software Foundation; either version 2 of the License, or (at your option) |
| 13 | * any later version. |
| 14 | * |
| 15 | */ |
| 16 | #include <crypto/internal/hash.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/cpufeature.h> |
| 20 | #include <crypto/sha.h> |
| 21 | #include <asm/cpacf.h> |
| 22 | |
| 23 | #include "sha.h" |
| 24 | |
| 25 | static int sha256_init(struct shash_desc *desc) |
| 26 | { |
| 27 | struct s390_sha_ctx *sctx = shash_desc_ctx(desc); |
| 28 | |
| 29 | sctx->state[0] = SHA256_H0; |
| 30 | sctx->state[1] = SHA256_H1; |
| 31 | sctx->state[2] = SHA256_H2; |
| 32 | sctx->state[3] = SHA256_H3; |
| 33 | sctx->state[4] = SHA256_H4; |
| 34 | sctx->state[5] = SHA256_H5; |
| 35 | sctx->state[6] = SHA256_H6; |
| 36 | sctx->state[7] = SHA256_H7; |
| 37 | sctx->count = 0; |
| 38 | sctx->func = CPACF_KIMD_SHA_256; |
| 39 | |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | static int sha256_export(struct shash_desc *desc, void *out) |
| 44 | { |
| 45 | struct s390_sha_ctx *sctx = shash_desc_ctx(desc); |
| 46 | struct sha256_state *octx = out; |
| 47 | |
| 48 | octx->count = sctx->count; |
| 49 | memcpy(octx->state, sctx->state, sizeof(octx->state)); |
| 50 | memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static int sha256_import(struct shash_desc *desc, const void *in) |
| 55 | { |
| 56 | struct s390_sha_ctx *sctx = shash_desc_ctx(desc); |
| 57 | const struct sha256_state *ictx = in; |
| 58 | |
| 59 | sctx->count = ictx->count; |
| 60 | memcpy(sctx->state, ictx->state, sizeof(ictx->state)); |
| 61 | memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); |
| 62 | sctx->func = CPACF_KIMD_SHA_256; |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | static struct shash_alg sha256_alg = { |
| 67 | .digestsize = SHA256_DIGEST_SIZE, |
| 68 | .init = sha256_init, |
| 69 | .update = s390_sha_update, |
| 70 | .final = s390_sha_final, |
| 71 | .export = sha256_export, |
| 72 | .import = sha256_import, |
| 73 | .descsize = sizeof(struct s390_sha_ctx), |
| 74 | .statesize = sizeof(struct sha256_state), |
| 75 | .base = { |
| 76 | .cra_name = "sha256", |
| 77 | .cra_driver_name= "sha256-s390", |
| 78 | .cra_priority = 300, |
| 79 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 80 | .cra_blocksize = SHA256_BLOCK_SIZE, |
| 81 | .cra_module = THIS_MODULE, |
| 82 | } |
| 83 | }; |
| 84 | |
| 85 | static int sha224_init(struct shash_desc *desc) |
| 86 | { |
| 87 | struct s390_sha_ctx *sctx = shash_desc_ctx(desc); |
| 88 | |
| 89 | sctx->state[0] = SHA224_H0; |
| 90 | sctx->state[1] = SHA224_H1; |
| 91 | sctx->state[2] = SHA224_H2; |
| 92 | sctx->state[3] = SHA224_H3; |
| 93 | sctx->state[4] = SHA224_H4; |
| 94 | sctx->state[5] = SHA224_H5; |
| 95 | sctx->state[6] = SHA224_H6; |
| 96 | sctx->state[7] = SHA224_H7; |
| 97 | sctx->count = 0; |
| 98 | sctx->func = CPACF_KIMD_SHA_256; |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static struct shash_alg sha224_alg = { |
| 104 | .digestsize = SHA224_DIGEST_SIZE, |
| 105 | .init = sha224_init, |
| 106 | .update = s390_sha_update, |
| 107 | .final = s390_sha_final, |
| 108 | .export = sha256_export, |
| 109 | .import = sha256_import, |
| 110 | .descsize = sizeof(struct s390_sha_ctx), |
| 111 | .statesize = sizeof(struct sha256_state), |
| 112 | .base = { |
| 113 | .cra_name = "sha224", |
| 114 | .cra_driver_name= "sha224-s390", |
| 115 | .cra_priority = 300, |
| 116 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| 117 | .cra_blocksize = SHA224_BLOCK_SIZE, |
| 118 | .cra_module = THIS_MODULE, |
| 119 | } |
| 120 | }; |
| 121 | |
| 122 | static int __init sha256_s390_init(void) |
| 123 | { |
| 124 | int ret; |
| 125 | |
| 126 | if (!cpacf_query(CPACF_KIMD, CPACF_KIMD_SHA_256)) |
| 127 | return -EOPNOTSUPP; |
| 128 | ret = crypto_register_shash(&sha256_alg); |
| 129 | if (ret < 0) |
| 130 | goto out; |
| 131 | ret = crypto_register_shash(&sha224_alg); |
| 132 | if (ret < 0) |
| 133 | crypto_unregister_shash(&sha256_alg); |
| 134 | out: |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | static void __exit sha256_s390_fini(void) |
| 139 | { |
| 140 | crypto_unregister_shash(&sha224_alg); |
| 141 | crypto_unregister_shash(&sha256_alg); |
| 142 | } |
| 143 | |
| 144 | module_cpu_feature_match(MSA, sha256_s390_init); |
| 145 | module_exit(sha256_s390_fini); |
| 146 | |
| 147 | MODULE_ALIAS_CRYPTO("sha256"); |
| 148 | MODULE_ALIAS_CRYPTO("sha224"); |
| 149 | MODULE_LICENSE("GPL"); |
| 150 | MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm"); |