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 22 #include "sha.h" 23 #include "crypt_s390.h" 24 25 static int sha512_init(struct shash_desc *desc) 26 { 27 struct s390_sha_ctx *ctx = shash_desc_ctx(desc); 28 29 *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL; 30 *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL; 31 *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL; 32 *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL; 33 *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL; 34 *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL; 35 *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL; 36 *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL; 37 ctx->count = 0; 38 ctx->func = KIMD_SHA_512; 39 40 return 0; 41 } 42 43 static int sha512_export(struct shash_desc *desc, void *out) 44 { 45 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 46 struct sha512_state *octx = out; 47 48 octx->count[0] = sctx->count; 49 octx->count[1] = 0; 50 memcpy(octx->state, sctx->state, sizeof(octx->state)); 51 memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); 52 return 0; 53 } 54 55 static int sha512_import(struct shash_desc *desc, const void *in) 56 { 57 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 58 const struct sha512_state *ictx = in; 59 60 if (unlikely(ictx->count[1])) 61 return -ERANGE; 62 sctx->count = ictx->count[0]; 63 64 memcpy(sctx->state, ictx->state, sizeof(ictx->state)); 65 memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); 66 sctx->func = KIMD_SHA_512; 67 return 0; 68 } 69 70 static struct shash_alg sha512_alg = { 71 .digestsize = SHA512_DIGEST_SIZE, 72 .init = sha512_init, 73 .update = s390_sha_update, 74 .final = s390_sha_final, 75 .export = sha512_export, 76 .import = sha512_import, 77 .descsize = sizeof(struct s390_sha_ctx), 78 .statesize = sizeof(struct sha512_state), 79 .base = { 80 .cra_name = "sha512", 81 .cra_driver_name= "sha512-s390", 82 .cra_priority = CRYPT_S390_PRIORITY, 83 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 84 .cra_blocksize = SHA512_BLOCK_SIZE, 85 .cra_module = THIS_MODULE, 86 } 87 }; 88 89 MODULE_ALIAS_CRYPTO("sha512"); 90 91 static int sha384_init(struct shash_desc *desc) 92 { 93 struct s390_sha_ctx *ctx = shash_desc_ctx(desc); 94 95 *(__u64 *)&ctx->state[0] = 0xcbbb9d5dc1059ed8ULL; 96 *(__u64 *)&ctx->state[2] = 0x629a292a367cd507ULL; 97 *(__u64 *)&ctx->state[4] = 0x9159015a3070dd17ULL; 98 *(__u64 *)&ctx->state[6] = 0x152fecd8f70e5939ULL; 99 *(__u64 *)&ctx->state[8] = 0x67332667ffc00b31ULL; 100 *(__u64 *)&ctx->state[10] = 0x8eb44a8768581511ULL; 101 *(__u64 *)&ctx->state[12] = 0xdb0c2e0d64f98fa7ULL; 102 *(__u64 *)&ctx->state[14] = 0x47b5481dbefa4fa4ULL; 103 ctx->count = 0; 104 ctx->func = KIMD_SHA_512; 105 106 return 0; 107 } 108 109 static struct shash_alg sha384_alg = { 110 .digestsize = SHA384_DIGEST_SIZE, 111 .init = sha384_init, 112 .update = s390_sha_update, 113 .final = s390_sha_final, 114 .export = sha512_export, 115 .import = sha512_import, 116 .descsize = sizeof(struct s390_sha_ctx), 117 .statesize = sizeof(struct sha512_state), 118 .base = { 119 .cra_name = "sha384", 120 .cra_driver_name= "sha384-s390", 121 .cra_priority = CRYPT_S390_PRIORITY, 122 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 123 .cra_blocksize = SHA384_BLOCK_SIZE, 124 .cra_ctxsize = sizeof(struct s390_sha_ctx), 125 .cra_module = THIS_MODULE, 126 } 127 }; 128 129 MODULE_ALIAS_CRYPTO("sha384"); 130 131 static int __init init(void) 132 { 133 int ret; 134 135 if (!crypt_s390_func_available(KIMD_SHA_512, CRYPT_S390_MSA)) 136 return -EOPNOTSUPP; 137 if ((ret = crypto_register_shash(&sha512_alg)) < 0) 138 goto out; 139 if ((ret = crypto_register_shash(&sha384_alg)) < 0) 140 crypto_unregister_shash(&sha512_alg); 141 out: 142 return ret; 143 } 144 145 static void __exit fini(void) 146 { 147 crypto_unregister_shash(&sha512_alg); 148 crypto_unregister_shash(&sha384_alg); 149 } 150 151 module_init(init); 152 module_exit(fini); 153 154 MODULE_LICENSE("GPL"); 155 MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm"); 156