1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /* Glue code for SHA256 hashing optimized for
3 *
4 * This is based largely upon crypto/sha256_ge
5 *
6 * Copyright (c) Jean-Luc Cooke <jlcooke@certa
7 * Copyright (c) Andrew McDonald <andrew@mcdon
8 * Copyright (c) 2002 James Morris <jmorris@in
9 * SHA224 Support Copyright 2007 Intel Corpora
10 */
11
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fm
13
14 #include <crypto/internal/hash.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/mm.h>
18 #include <linux/types.h>
19 #include <crypto/sha2.h>
20 #include <crypto/sha256_base.h>
21
22 #include <asm/pstate.h>
23 #include <asm/elf.h>
24
25 #include "opcodes.h"
26
27 asmlinkage void sha256_sparc64_transform(u32 *
28 unsig
29
30 static void __sha256_sparc64_update(struct sha
31 unsigned i
32 {
33 unsigned int done = 0;
34
35 sctx->count += len;
36 if (partial) {
37 done = SHA256_BLOCK_SIZE - par
38 memcpy(sctx->buf + partial, da
39 sha256_sparc64_transform(sctx-
40 }
41 if (len - done >= SHA256_BLOCK_SIZE) {
42 const unsigned int rounds = (l
43
44 sha256_sparc64_transform(sctx-
45 done += rounds * SHA256_BLOCK_
46 }
47
48 memcpy(sctx->buf, data + done, len - d
49 }
50
51 static int sha256_sparc64_update(struct shash_
52 unsigned int
53 {
54 struct sha256_state *sctx = shash_desc
55 unsigned int partial = sctx->count % S
56
57 /* Handle the fast case right here */
58 if (partial + len < SHA256_BLOCK_SIZE)
59 sctx->count += len;
60 memcpy(sctx->buf + partial, da
61 } else
62 __sha256_sparc64_update(sctx,
63
64 return 0;
65 }
66
67 static int sha256_sparc64_final(struct shash_d
68 {
69 struct sha256_state *sctx = shash_desc
70 unsigned int i, index, padlen;
71 __be32 *dst = (__be32 *)out;
72 __be64 bits;
73 static const u8 padding[SHA256_BLOCK_S
74
75 bits = cpu_to_be64(sctx->count << 3);
76
77 /* Pad out to 56 mod 64 and append len
78 index = sctx->count % SHA256_BLOCK_SIZ
79 padlen = (index < 56) ? (56 - index) :
80
81 /* We need to fill a whole block for _
82 if (padlen <= 56) {
83 sctx->count += padlen;
84 memcpy(sctx->buf + index, padd
85 } else {
86 __sha256_sparc64_update(sctx,
87 }
88 __sha256_sparc64_update(sctx, (const u
89
90 /* Store state in digest */
91 for (i = 0; i < 8; i++)
92 dst[i] = cpu_to_be32(sctx->sta
93
94 /* Wipe context */
95 memset(sctx, 0, sizeof(*sctx));
96
97 return 0;
98 }
99
100 static int sha224_sparc64_final(struct shash_d
101 {
102 u8 D[SHA256_DIGEST_SIZE];
103
104 sha256_sparc64_final(desc, D);
105
106 memcpy(hash, D, SHA224_DIGEST_SIZE);
107 memzero_explicit(D, SHA256_DIGEST_SIZE
108
109 return 0;
110 }
111
112 static int sha256_sparc64_export(struct shash_
113 {
114 struct sha256_state *sctx = shash_desc
115
116 memcpy(out, sctx, sizeof(*sctx));
117 return 0;
118 }
119
120 static int sha256_sparc64_import(struct shash_
121 {
122 struct sha256_state *sctx = shash_desc
123
124 memcpy(sctx, in, sizeof(*sctx));
125 return 0;
126 }
127
128 static struct shash_alg sha256_alg = {
129 .digestsize = SHA256_DIGEST_
130 .init = sha256_base_in
131 .update = sha256_sparc64
132 .final = sha256_sparc64
133 .export = sha256_sparc64
134 .import = sha256_sparc64
135 .descsize = sizeof(struct
136 .statesize = sizeof(struct
137 .base = {
138 .cra_name = "sha25
139 .cra_driver_name= "sha25
140 .cra_priority = SPARC_
141 .cra_blocksize = SHA256
142 .cra_module = THIS_M
143 }
144 };
145
146 static struct shash_alg sha224_alg = {
147 .digestsize = SHA224_DIGEST_
148 .init = sha224_base_in
149 .update = sha256_sparc64
150 .final = sha224_sparc64
151 .descsize = sizeof(struct
152 .base = {
153 .cra_name = "sha22
154 .cra_driver_name= "sha22
155 .cra_priority = SPARC_
156 .cra_blocksize = SHA224
157 .cra_module = THIS_M
158 }
159 };
160
161 static bool __init sparc64_has_sha256_opcode(v
162 {
163 unsigned long cfr;
164
165 if (!(sparc64_elf_hwcap & HWCAP_SPARC_
166 return false;
167
168 __asm__ __volatile__("rd %%asr26, %0"
169 if (!(cfr & CFR_SHA256))
170 return false;
171
172 return true;
173 }
174
175 static int __init sha256_sparc64_mod_init(void
176 {
177 if (sparc64_has_sha256_opcode()) {
178 int ret = crypto_register_shas
179 if (ret < 0)
180 return ret;
181
182 ret = crypto_register_shash(&s
183 if (ret < 0) {
184 crypto_unregister_shas
185 return ret;
186 }
187
188 pr_info("Using sparc64 sha256
189 return 0;
190 }
191 pr_info("sparc64 sha256 opcode not ava
192 return -ENODEV;
193 }
194
195 static void __exit sha256_sparc64_mod_fini(voi
196 {
197 crypto_unregister_shash(&sha224_alg);
198 crypto_unregister_shash(&sha256_alg);
199 }
200
201 module_init(sha256_sparc64_mod_init);
202 module_exit(sha256_sparc64_mod_fini);
203
204 MODULE_LICENSE("GPL");
205 MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure
206
207 MODULE_ALIAS_CRYPTO("sha224");
208 MODULE_ALIAS_CRYPTO("sha256");
209
210 #include "crop_devid.c"
211
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