1 // SPDX-License-Identifier: GPL-2.0-or-later !! 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* !! 2 /* Glue code for SHA1 hashing optimized for sparc64 crypto opcodes.
3 * Cryptographic API. <<
4 * Glue code for the SHA1 Secure Hash Algorith <<
5 * 3 *
6 * This file is based on sha1_generic.c and sh !! 4 * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
7 * 5 *
8 * Copyright (c) Alan Smithee. 6 * Copyright (c) Alan Smithee.
9 * Copyright (c) Andrew McDonald <andrew@mcdon 7 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
10 * Copyright (c) Jean-Francois Dive <jef@linux 8 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
11 * Copyright (c) Mathias Krause <minipli@googl 9 * Copyright (c) Mathias Krause <minipli@googlemail.com>
12 */ 10 */
13 11
>> 12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>> 13
14 #include <crypto/internal/hash.h> 14 #include <crypto/internal/hash.h>
15 #include <linux/init.h> 15 #include <linux/init.h>
16 #include <linux/module.h> 16 #include <linux/module.h>
>> 17 #include <linux/mm.h>
17 #include <linux/types.h> 18 #include <linux/types.h>
18 #include <crypto/sha1.h> 19 #include <crypto/sha1.h>
19 #include <crypto/sha1_base.h> 20 #include <crypto/sha1_base.h>
20 #include <asm/byteorder.h> <<
21 21
22 #include "sha1.h" !! 22 #include <asm/pstate.h>
>> 23 #include <asm/elf.h>
>> 24
>> 25 #include "opcodes.h"
>> 26
>> 27 asmlinkage void sha1_sparc64_transform(u32 *digest, const char *data,
>> 28 unsigned int rounds);
>> 29
>> 30 static void __sha1_sparc64_update(struct sha1_state *sctx, const u8 *data,
>> 31 unsigned int len, unsigned int partial)
>> 32 {
>> 33 unsigned int done = 0;
>> 34
>> 35 sctx->count += len;
>> 36 if (partial) {
>> 37 done = SHA1_BLOCK_SIZE - partial;
>> 38 memcpy(sctx->buffer + partial, data, done);
>> 39 sha1_sparc64_transform(sctx->state, sctx->buffer, 1);
>> 40 }
>> 41 if (len - done >= SHA1_BLOCK_SIZE) {
>> 42 const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
>> 43
>> 44 sha1_sparc64_transform(sctx->state, data + done, rounds);
>> 45 done += rounds * SHA1_BLOCK_SIZE;
>> 46 }
>> 47
>> 48 memcpy(sctx->buffer, data + done, len - done);
>> 49 }
>> 50
>> 51 static int sha1_sparc64_update(struct shash_desc *desc, const u8 *data,
>> 52 unsigned int len)
>> 53 {
>> 54 struct sha1_state *sctx = shash_desc_ctx(desc);
>> 55 unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
>> 56
>> 57 /* Handle the fast case right here */
>> 58 if (partial + len < SHA1_BLOCK_SIZE) {
>> 59 sctx->count += len;
>> 60 memcpy(sctx->buffer + partial, data, len);
>> 61 } else
>> 62 __sha1_sparc64_update(sctx, data, len, partial);
23 63
24 asmlinkage void sha1_block_data_order(struct s !! 64 return 0;
25 const u8 *data, int rounds); !! 65 }
26 66
27 int sha1_update_arm(struct shash_desc *desc, c !! 67 /* Add padding and return the message digest. */
28 unsigned int len) !! 68 static int sha1_sparc64_final(struct shash_desc *desc, u8 *out)
29 { 69 {
30 /* make sure signature matches sha1_bl !! 70 struct sha1_state *sctx = shash_desc_ctx(desc);
31 BUILD_BUG_ON(offsetof(struct sha1_stat !! 71 unsigned int i, index, padlen;
>> 72 __be32 *dst = (__be32 *)out;
>> 73 __be64 bits;
>> 74 static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
>> 75
>> 76 bits = cpu_to_be64(sctx->count << 3);
>> 77
>> 78 /* Pad out to 56 mod 64 and append length */
>> 79 index = sctx->count % SHA1_BLOCK_SIZE;
>> 80 padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
>> 81
>> 82 /* We need to fill a whole block for __sha1_sparc64_update() */
>> 83 if (padlen <= 56) {
>> 84 sctx->count += padlen;
>> 85 memcpy(sctx->buffer + index, padding, padlen);
>> 86 } else {
>> 87 __sha1_sparc64_update(sctx, padding, padlen, index);
>> 88 }
>> 89 __sha1_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
32 90
33 return sha1_base_do_update(desc, data, !! 91 /* Store state in digest */
>> 92 for (i = 0; i < 5; i++)
>> 93 dst[i] = cpu_to_be32(sctx->state[i]);
>> 94
>> 95 /* Wipe context */
>> 96 memset(sctx, 0, sizeof(*sctx));
>> 97
>> 98 return 0;
34 } 99 }
35 EXPORT_SYMBOL_GPL(sha1_update_arm); <<
36 100
37 static int sha1_final(struct shash_desc *desc, !! 101 static int sha1_sparc64_export(struct shash_desc *desc, void *out)
38 { 102 {
39 sha1_base_do_finalize(desc, sha1_block !! 103 struct sha1_state *sctx = shash_desc_ctx(desc);
40 return sha1_base_finish(desc, out); !! 104
>> 105 memcpy(out, sctx, sizeof(*sctx));
>> 106
>> 107 return 0;
41 } 108 }
42 109
43 int sha1_finup_arm(struct shash_desc *desc, co !! 110 static int sha1_sparc64_import(struct shash_desc *desc, const void *in)
44 unsigned int len, u8 *out) <<
45 { 111 {
46 sha1_base_do_update(desc, data, len, s !! 112 struct sha1_state *sctx = shash_desc_ctx(desc);
47 return sha1_final(desc, out); !! 113
>> 114 memcpy(sctx, in, sizeof(*sctx));
>> 115
>> 116 return 0;
48 } 117 }
49 EXPORT_SYMBOL_GPL(sha1_finup_arm); <<
50 118
51 static struct shash_alg alg = { 119 static struct shash_alg alg = {
52 .digestsize = SHA1_DIGEST_SI 120 .digestsize = SHA1_DIGEST_SIZE,
53 .init = sha1_base_init 121 .init = sha1_base_init,
54 .update = sha1_update_ar !! 122 .update = sha1_sparc64_update,
55 .final = sha1_final, !! 123 .final = sha1_sparc64_final,
56 .finup = sha1_finup_arm !! 124 .export = sha1_sparc64_export,
>> 125 .import = sha1_sparc64_import,
57 .descsize = sizeof(struct 126 .descsize = sizeof(struct sha1_state),
>> 127 .statesize = sizeof(struct sha1_state),
58 .base = { 128 .base = {
59 .cra_name = "sha1" 129 .cra_name = "sha1",
60 .cra_driver_name= "sha1- !! 130 .cra_driver_name= "sha1-sparc64",
61 .cra_priority = 150, !! 131 .cra_priority = SPARC_CR_OPCODE_PRIORITY,
62 .cra_blocksize = SHA1_B 132 .cra_blocksize = SHA1_BLOCK_SIZE,
63 .cra_module = THIS_M 133 .cra_module = THIS_MODULE,
64 } 134 }
65 }; 135 };
66 136
67 !! 137 static bool __init sparc64_has_sha1_opcode(void)
68 static int __init sha1_mod_init(void) <<
69 { 138 {
70 return crypto_register_shash(&alg); !! 139 unsigned long cfr;
>> 140
>> 141 if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
>> 142 return false;
>> 143
>> 144 __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
>> 145 if (!(cfr & CFR_SHA1))
>> 146 return false;
>> 147
>> 148 return true;
71 } 149 }
72 150
>> 151 static int __init sha1_sparc64_mod_init(void)
>> 152 {
>> 153 if (sparc64_has_sha1_opcode()) {
>> 154 pr_info("Using sparc64 sha1 opcode optimized SHA-1 implementation\n");
>> 155 return crypto_register_shash(&alg);
>> 156 }
>> 157 pr_info("sparc64 sha1 opcode not available.\n");
>> 158 return -ENODEV;
>> 159 }
73 160
74 static void __exit sha1_mod_fini(void) !! 161 static void __exit sha1_sparc64_mod_fini(void)
75 { 162 {
76 crypto_unregister_shash(&alg); 163 crypto_unregister_shash(&alg);
77 } 164 }
78 165
79 !! 166 module_init(sha1_sparc64_mod_init);
80 module_init(sha1_mod_init); !! 167 module_exit(sha1_sparc64_mod_fini);
81 module_exit(sha1_mod_fini); <<
82 168
83 MODULE_LICENSE("GPL"); 169 MODULE_LICENSE("GPL");
84 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm !! 170 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, sparc64 sha1 opcode accelerated");
>> 171
85 MODULE_ALIAS_CRYPTO("sha1"); 172 MODULE_ALIAS_CRYPTO("sha1");
86 MODULE_AUTHOR("David McCullough <ucdevel@gmail !! 173
>> 174 #include "crop_devid.c"
87 175
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