1 /* 2 * Cryptographic API. 3 * 4 * s390 implementation of the SHA1 Secure Hash Algorithm. 5 * 6 * Derived from cryptoapi implementation, adapted for in-place 7 * scatterlist interface. Originally based on the public domain 8 * implementation written by Steve Reid. 9 * 10 * s390 Version: 11 * Copyright IBM Corp. 2003, 2007 12 * Author(s): Thomas Spatzier 13 * Jan Glauber (jan.glauber@de.ibm.com) 14 * 15 * Derived from "crypto/sha1_generic.c" 16 * Copyright (c) Alan Smithee. 17 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 18 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> 19 * 20 * This program is free software; you can redistribute it and/or modify it 21 * under the terms of the GNU General Public License as published by the Free 22 * Software Foundation; either version 2 of the License, or (at your option) 23 * any later version. 24 * 25 */ 26 #include <crypto/internal/hash.h> 27 #include <linux/init.h> 28 #include <linux/module.h> 29 #include <linux/cpufeature.h> 30 #include <crypto/sha.h> 31 #include <asm/cpacf.h> 32 33 #include "sha.h" 34 35 static int sha1_init(struct shash_desc *desc) 36 { 37 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 38 39 sctx->state[0] = SHA1_H0; 40 sctx->state[1] = SHA1_H1; 41 sctx->state[2] = SHA1_H2; 42 sctx->state[3] = SHA1_H3; 43 sctx->state[4] = SHA1_H4; 44 sctx->count = 0; 45 sctx->func = CPACF_KIMD_SHA_1; 46 47 return 0; 48 } 49 50 static int sha1_export(struct shash_desc *desc, void *out) 51 { 52 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 53 struct sha1_state *octx = out; 54 55 octx->count = sctx->count; 56 memcpy(octx->state, sctx->state, sizeof(octx->state)); 57 memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer)); 58 return 0; 59 } 60 61 static int sha1_import(struct shash_desc *desc, const void *in) 62 { 63 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 64 const struct sha1_state *ictx = in; 65 66 sctx->count = ictx->count; 67 memcpy(sctx->state, ictx->state, sizeof(ictx->state)); 68 memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer)); 69 sctx->func = CPACF_KIMD_SHA_1; 70 return 0; 71 } 72 73 static struct shash_alg alg = { 74 .digestsize = SHA1_DIGEST_SIZE, 75 .init = sha1_init, 76 .update = s390_sha_update, 77 .final = s390_sha_final, 78 .export = sha1_export, 79 .import = sha1_import, 80 .descsize = sizeof(struct s390_sha_ctx), 81 .statesize = sizeof(struct sha1_state), 82 .base = { 83 .cra_name = "sha1", 84 .cra_driver_name= "sha1-s390", 85 .cra_priority = 300, 86 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 87 .cra_blocksize = SHA1_BLOCK_SIZE, 88 .cra_module = THIS_MODULE, 89 } 90 }; 91 92 static int __init sha1_s390_init(void) 93 { 94 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1)) 95 return -EOPNOTSUPP; 96 return crypto_register_shash(&alg); 97 } 98 99 static void __exit sha1_s390_fini(void) 100 { 101 crypto_unregister_shash(&alg); 102 } 103 104 module_cpu_feature_match(MSA, sha1_s390_init); 105 module_exit(sha1_s390_fini); 106 107 MODULE_ALIAS_CRYPTO("sha1"); 108 MODULE_LICENSE("GPL"); 109 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); 110