1 // SPDX-License-Identifier: GPL-2.0-only 1 2 /* Glue code for SHA512 hashing optimized for 3 * 4 * This is based largely upon crypto/sha512_ge 5 * 6 * Copyright (c) Jean-Luc Cooke <jlcooke@certa 7 * Copyright (c) Andrew McDonald <andrew@mcdon 8 * Copyright (c) 2003 Kyle McMartin <kyle@debi 9 */ 10 11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fm 12 13 #include <crypto/internal/hash.h> 14 #include <linux/init.h> 15 #include <linux/module.h> 16 #include <linux/mm.h> 17 #include <linux/types.h> 18 #include <crypto/sha2.h> 19 #include <crypto/sha512_base.h> 20 21 #include <asm/pstate.h> 22 #include <asm/elf.h> 23 24 #include "opcodes.h" 25 26 asmlinkage void sha512_sparc64_transform(u64 * 27 unsig 28 29 static void __sha512_sparc64_update(struct sha 30 unsigned i 31 { 32 unsigned int done = 0; 33 34 if ((sctx->count[0] += len) < len) 35 sctx->count[1]++; 36 if (partial) { 37 done = SHA512_BLOCK_SIZE - par 38 memcpy(sctx->buf + partial, da 39 sha512_sparc64_transform(sctx- 40 } 41 if (len - done >= SHA512_BLOCK_SIZE) { 42 const unsigned int rounds = (l 43 44 sha512_sparc64_transform(sctx- 45 done += rounds * SHA512_BLOCK_ 46 } 47 48 memcpy(sctx->buf, data + done, len - d 49 } 50 51 static int sha512_sparc64_update(struct shash_ 52 unsigned int 53 { 54 struct sha512_state *sctx = shash_desc 55 unsigned int partial = sctx->count[0] 56 57 /* Handle the fast case right here */ 58 if (partial + len < SHA512_BLOCK_SIZE) 59 if ((sctx->count[0] += len) < 60 sctx->count[1]++; 61 memcpy(sctx->buf + partial, da 62 } else 63 __sha512_sparc64_update(sctx, 64 65 return 0; 66 } 67 68 static int sha512_sparc64_final(struct shash_d 69 { 70 struct sha512_state *sctx = shash_desc 71 unsigned int i, index, padlen; 72 __be64 *dst = (__be64 *)out; 73 __be64 bits[2]; 74 static const u8 padding[SHA512_BLOCK_S 75 76 /* Save number of bits */ 77 bits[1] = cpu_to_be64(sctx->count[0] < 78 bits[0] = cpu_to_be64(sctx->count[1] < 79 80 /* Pad out to 112 mod 128 and append l 81 index = sctx->count[0] % SHA512_BLOCK_ 82 padlen = (index < 112) ? (112 - index) 83 84 /* We need to fill a whole block for _ 85 if (padlen <= 112) { 86 if ((sctx->count[0] += padlen) 87 sctx->count[1]++; 88 memcpy(sctx->buf + index, padd 89 } else { 90 __sha512_sparc64_update(sctx, 91 } 92 __sha512_sparc64_update(sctx, (const u 93 94 /* Store state in digest */ 95 for (i = 0; i < 8; i++) 96 dst[i] = cpu_to_be64(sctx->sta 97 98 /* Wipe context */ 99 memset(sctx, 0, sizeof(*sctx)); 100 101 return 0; 102 } 103 104 static int sha384_sparc64_final(struct shash_d 105 { 106 u8 D[64]; 107 108 sha512_sparc64_final(desc, D); 109 110 memcpy(hash, D, 48); 111 memzero_explicit(D, 64); 112 113 return 0; 114 } 115 116 static struct shash_alg sha512 = { 117 .digestsize = SHA512_DIGEST_ 118 .init = sha512_base_in 119 .update = sha512_sparc64 120 .final = sha512_sparc64 121 .descsize = sizeof(struct 122 .base = { 123 .cra_name = "sha51 124 .cra_driver_name= "sha51 125 .cra_priority = SPARC_ 126 .cra_blocksize = SHA512 127 .cra_module = THIS_M 128 } 129 }; 130 131 static struct shash_alg sha384 = { 132 .digestsize = SHA384_DIGEST_ 133 .init = sha384_base_in 134 .update = sha512_sparc64 135 .final = sha384_sparc64 136 .descsize = sizeof(struct 137 .base = { 138 .cra_name = "sha38 139 .cra_driver_name= "sha38 140 .cra_priority = SPARC_ 141 .cra_blocksize = SHA384 142 .cra_module = THIS_M 143 } 144 }; 145 146 static bool __init sparc64_has_sha512_opcode(v 147 { 148 unsigned long cfr; 149 150 if (!(sparc64_elf_hwcap & HWCAP_SPARC_ 151 return false; 152 153 __asm__ __volatile__("rd %%asr26, %0" 154 if (!(cfr & CFR_SHA512)) 155 return false; 156 157 return true; 158 } 159 160 static int __init sha512_sparc64_mod_init(void 161 { 162 if (sparc64_has_sha512_opcode()) { 163 int ret = crypto_register_shas 164 if (ret < 0) 165 return ret; 166 167 ret = crypto_register_shash(&s 168 if (ret < 0) { 169 crypto_unregister_shas 170 return ret; 171 } 172 173 pr_info("Using sparc64 sha512 174 return 0; 175 } 176 pr_info("sparc64 sha512 opcode not ava 177 return -ENODEV; 178 } 179 180 static void __exit sha512_sparc64_mod_fini(voi 181 { 182 crypto_unregister_shash(&sha384); 183 crypto_unregister_shash(&sha512); 184 } 185 186 module_init(sha512_sparc64_mod_init); 187 module_exit(sha512_sparc64_mod_fini); 188 189 MODULE_LICENSE("GPL"); 190 MODULE_DESCRIPTION("SHA-384 and SHA-512 Secure 191 192 MODULE_ALIAS_CRYPTO("sha384"); 193 MODULE_ALIAS_CRYPTO("sha512"); 194 195 #include "crop_devid.c" 196
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