1 /* 2 * Cryptographic API. 3 * 4 * s390 implementation of the SHA256 Secure Hash Algorithm. 5 * 6 * s390 Version: 7 * Copyright IBM Corp. 2005,2007 8 * Author(s): Jan Glauber (jang@de.ibm.com) 9 * 10 * Derived from "crypto/sha256_generic.c" 11 * and "arch/s390/crypto/sha1_s390.c" 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the Free 15 * Software Foundation; either version 2 of the License, or (at your option) 16 * any later version. 17 * 18 */ 19 #include <crypto/internal/hash.h> 20 #include <linux/init.h> 21 #include <linux/module.h> 22 #include <crypto/sha.h> 23 24 #include "crypt_s390.h" 25 #include "sha.h" 26 27 static int sha256_init(struct shash_desc *desc) 28 { 29 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 30 31 sctx->state[0] = SHA256_H0; 32 sctx->state[1] = SHA256_H1; 33 sctx->state[2] = SHA256_H2; 34 sctx->state[3] = SHA256_H3; 35 sctx->state[4] = SHA256_H4; 36 sctx->state[5] = SHA256_H5; 37 sctx->state[6] = SHA256_H6; 38 sctx->state[7] = SHA256_H7; 39 sctx->count = 0; 40 sctx->func = KIMD_SHA_256; 41 42 return 0; 43 } 44 45 static struct shash_alg alg = { 46 .digestsize = SHA256_DIGEST_SIZE, 47 .init = sha256_init, 48 .update = s390_sha_update, 49 .final = s390_sha_final, 50 .descsize = sizeof(struct s390_sha_ctx), 51 .base = { 52 .cra_name = "sha256", 53 .cra_driver_name= "sha256-s390", 54 .cra_priority = CRYPT_S390_PRIORITY, 55 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 56 .cra_blocksize = SHA256_BLOCK_SIZE, 57 .cra_module = THIS_MODULE, 58 } 59 }; 60 61 static int sha256_s390_init(void) 62 { 63 if (!crypt_s390_func_available(KIMD_SHA_256)) 64 return -EOPNOTSUPP; 65 66 return crypto_register_shash(&alg); 67 } 68 69 static void __exit sha256_s390_fini(void) 70 { 71 crypto_unregister_shash(&alg); 72 } 73 74 module_init(sha256_s390_init); 75 module_exit(sha256_s390_fini); 76 77 MODULE_ALIAS("sha256"); 78 MODULE_LICENSE("GPL"); 79 MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm"); 80