1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Cryptographic API. 4 * 5 * s390 implementation of the SHA1 Secure Hash Algorithm. 6 * 7 * Derived from cryptoapi implementation, adapted for in-place 8 * scatterlist interface. Originally based on the public domain 9 * implementation written by Steve Reid. 10 * 11 * s390 Version: 12 * Copyright IBM Corp. 2003, 2007 13 * Author(s): Thomas Spatzier 14 * Jan Glauber (jan.glauber@de.ibm.com) 15 * 16 * Derived from "crypto/sha1_generic.c" 17 * Copyright (c) Alan Smithee. 18 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 19 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> 20 */ 21 #include <crypto/internal/hash.h> 22 #include <linux/init.h> 23 #include <linux/module.h> 24 #include <linux/cpufeature.h> 25 #include <crypto/sha.h> 26 #include <asm/cpacf.h> 27 28 #include "sha.h" 29 30 static int sha1_init(struct shash_desc *desc) 31 { 32 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 33 34 sctx->state[0] = SHA1_H0; 35 sctx->state[1] = SHA1_H1; 36 sctx->state[2] = SHA1_H2; 37 sctx->state[3] = SHA1_H3; 38 sctx->state[4] = SHA1_H4; 39 sctx->count = 0; 40 sctx->func = CPACF_KIMD_SHA_1; 41 42 return 0; 43 } 44 45 static int sha1_export(struct shash_desc *desc, void *out) 46 { 47 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 48 struct sha1_state *octx = out; 49 50 octx->count = sctx->count; 51 memcpy(octx->state, sctx->state, sizeof(octx->state)); 52 memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer)); 53 return 0; 54 } 55 56 static int sha1_import(struct shash_desc *desc, const void *in) 57 { 58 struct s390_sha_ctx *sctx = shash_desc_ctx(desc); 59 const struct sha1_state *ictx = in; 60 61 sctx->count = ictx->count; 62 memcpy(sctx->state, ictx->state, sizeof(ictx->state)); 63 memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer)); 64 sctx->func = CPACF_KIMD_SHA_1; 65 return 0; 66 } 67 68 static struct shash_alg alg = { 69 .digestsize = SHA1_DIGEST_SIZE, 70 .init = sha1_init, 71 .update = s390_sha_update, 72 .final = s390_sha_final, 73 .export = sha1_export, 74 .import = sha1_import, 75 .descsize = sizeof(struct s390_sha_ctx), 76 .statesize = sizeof(struct sha1_state), 77 .base = { 78 .cra_name = "sha1", 79 .cra_driver_name= "sha1-s390", 80 .cra_priority = 300, 81 .cra_blocksize = SHA1_BLOCK_SIZE, 82 .cra_module = THIS_MODULE, 83 } 84 }; 85 86 static int __init sha1_s390_init(void) 87 { 88 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1)) 89 return -ENODEV; 90 return crypto_register_shash(&alg); 91 } 92 93 static void __exit sha1_s390_fini(void) 94 { 95 crypto_unregister_shash(&alg); 96 } 97 98 module_cpu_feature_match(MSA, sha1_s390_init); 99 module_exit(sha1_s390_fini); 100 101 MODULE_ALIAS_CRYPTO("sha1"); 102 MODULE_LICENSE("GPL"); 103 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); 104