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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | /* * Cryptographic API. * * s390 implementation of the SHA256 Secure Hash Algorithm. * * s390 Version: * Copyright IBM Corp. 2005,2007 * Author(s): Jan Glauber (jang@de.ibm.com) * * Derived from "crypto/sha256_generic.c" * and "arch/s390/crypto/sha1_s390.c" * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ #include <crypto/internal/hash.h> #include <linux/init.h> #include <linux/module.h> #include <crypto/sha.h> #include "crypt_s390.h" #include "sha.h" static int sha256_init(struct shash_desc *desc) { struct s390_sha_ctx *sctx = shash_desc_ctx(desc); sctx->state[0] = SHA256_H0; sctx->state[1] = SHA256_H1; sctx->state[2] = SHA256_H2; sctx->state[3] = SHA256_H3; sctx->state[4] = SHA256_H4; sctx->state[5] = SHA256_H5; sctx->state[6] = SHA256_H6; sctx->state[7] = SHA256_H7; sctx->count = 0; sctx->func = KIMD_SHA_256; return 0; } static int sha256_export(struct shash_desc *desc, void *out) { struct s390_sha_ctx *sctx = shash_desc_ctx(desc); struct sha256_state *octx = out; octx->count = sctx->count; memcpy(octx->state, sctx->state, sizeof(octx->state)); memcpy(octx->buf, sctx->buf, sizeof(octx->buf)); return 0; } static int sha256_import(struct shash_desc *desc, const void *in) { struct s390_sha_ctx *sctx = shash_desc_ctx(desc); const struct sha256_state *ictx = in; sctx->count = ictx->count; memcpy(sctx->state, ictx->state, sizeof(ictx->state)); memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf)); sctx->func = KIMD_SHA_256; return 0; } static struct shash_alg alg = { .digestsize = SHA256_DIGEST_SIZE, .init = sha256_init, .update = s390_sha_update, .final = s390_sha_final, .export = sha256_export, .import = sha256_import, .descsize = sizeof(struct s390_sha_ctx), .statesize = sizeof(struct sha256_state), .base = { .cra_name = "sha256", .cra_driver_name= "sha256-s390", .cra_priority = CRYPT_S390_PRIORITY, .cra_flags = CRYPTO_ALG_TYPE_SHASH, .cra_blocksize = SHA256_BLOCK_SIZE, .cra_module = THIS_MODULE, } }; static int sha256_s390_init(void) { if (!crypt_s390_func_available(KIMD_SHA_256)) return -EOPNOTSUPP; return crypto_register_shash(&alg); } static void __exit sha256_s390_fini(void) { crypto_unregister_shash(&alg); } module_init(sha256_s390_init); module_exit(sha256_s390_fini); MODULE_ALIAS("sha256"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm"); |