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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/* Glue code for MD5 hashing optimized for sparc64 crypto opcodes.
*
* This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
* and crypto/md5.c which are:
*
* Copyright (c) Alan Smithee.
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
* Copyright (c) Mathias Krause <minipli@googlemail.com>
* Copyright (c) Cryptoapi developers.
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/cryptohash.h>
#include <linux/types.h>
#include <crypto/md5.h>
#include <asm/pstate.h>
#include <asm/elf.h>
#include "opcodes.h"
asmlinkage void md5_sparc64_transform(u32 *digest, const char *data,
unsigned int rounds);
static int md5_sparc64_init(struct shash_desc *desc)
{
struct md5_state *mctx = shash_desc_ctx(desc);
mctx->hash[0] = cpu_to_le32(0x67452301);
mctx->hash[1] = cpu_to_le32(0xefcdab89);
mctx->hash[2] = cpu_to_le32(0x98badcfe);
mctx->hash[3] = cpu_to_le32(0x10325476);
mctx->byte_count = 0;
return 0;
}
static void __md5_sparc64_update(struct md5_state *sctx, const u8 *data,
unsigned int len, unsigned int partial)
{
unsigned int done = 0;
sctx->byte_count += len;
if (partial) {
done = MD5_HMAC_BLOCK_SIZE - partial;
memcpy((u8 *)sctx->block + partial, data, done);
md5_sparc64_transform(sctx->hash, (u8 *)sctx->block, 1);
}
if (len - done >= MD5_HMAC_BLOCK_SIZE) {
const unsigned int rounds = (len - done) / MD5_HMAC_BLOCK_SIZE;
md5_sparc64_transform(sctx->hash, data + done, rounds);
done += rounds * MD5_HMAC_BLOCK_SIZE;
}
memcpy(sctx->block, data + done, len - done);
}
static int md5_sparc64_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct md5_state *sctx = shash_desc_ctx(desc);
unsigned int partial = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
/* Handle the fast case right here */
if (partial + len < MD5_HMAC_BLOCK_SIZE) {
sctx->byte_count += len;
memcpy((u8 *)sctx->block + partial, data, len);
} else
__md5_sparc64_update(sctx, data, len, partial);
return 0;
}
/* Add padding and return the message digest. */
static int md5_sparc64_final(struct shash_desc *desc, u8 *out)
{
struct md5_state *sctx = shash_desc_ctx(desc);
unsigned int i, index, padlen;
u32 *dst = (u32 *)out;
__le64 bits;
static const u8 padding[MD5_HMAC_BLOCK_SIZE] = { 0x80, };
bits = cpu_to_le64(sctx->byte_count << 3);
/* Pad out to 56 mod 64 and append length */
index = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
padlen = (index < 56) ? (56 - index) : ((MD5_HMAC_BLOCK_SIZE+56) - index);
/* We need to fill a whole block for __md5_sparc64_update() */
if (padlen <= 56) {
sctx->byte_count += padlen;
memcpy((u8 *)sctx->block + index, padding, padlen);
} else {
__md5_sparc64_update(sctx, padding, padlen, index);
}
__md5_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
/* Store state in digest */
for (i = 0; i < MD5_HASH_WORDS; i++)
dst[i] = sctx->hash[i];
/* Wipe context */
memset(sctx, 0, sizeof(*sctx));
return 0;
}
static int md5_sparc64_export(struct shash_desc *desc, void *out)
{
struct md5_state *sctx = shash_desc_ctx(desc);
memcpy(out, sctx, sizeof(*sctx));
return 0;
}
static int md5_sparc64_import(struct shash_desc *desc, const void *in)
{
struct md5_state *sctx = shash_desc_ctx(desc);
memcpy(sctx, in, sizeof(*sctx));
return 0;
}
static struct shash_alg alg = {
.digestsize = MD5_DIGEST_SIZE,
.init = md5_sparc64_init,
.update = md5_sparc64_update,
.final = md5_sparc64_final,
.export = md5_sparc64_export,
.import = md5_sparc64_import,
.descsize = sizeof(struct md5_state),
.statesize = sizeof(struct md5_state),
.base = {
.cra_name = "md5",
.cra_driver_name= "md5-sparc64",
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static bool __init sparc64_has_md5_opcode(void)
{
unsigned long cfr;
if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
return false;
__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
if (!(cfr & CFR_MD5))
return false;
return true;
}
static int __init md5_sparc64_mod_init(void)
{
if (sparc64_has_md5_opcode()) {
pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n");
return crypto_register_shash(&alg);
}
pr_info("sparc64 md5 opcode not available.\n");
return -ENODEV;
}
static void __exit md5_sparc64_mod_fini(void)
{
crypto_unregister_shash(&alg);
}
module_init(md5_sparc64_mod_init);
module_exit(md5_sparc64_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MD5 Secure Hash Algorithm, sparc64 md5 opcode accelerated");
MODULE_ALIAS("md5");
|
