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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