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Diffstat (limited to 'arch/x86/crypto/sha512_ssse3_glue.c')
-rw-r--r--arch/x86/crypto/sha512_ssse3_glue.c202
1 files changed, 35 insertions, 167 deletions
diff --git a/arch/x86/crypto/sha512_ssse3_glue.c b/arch/x86/crypto/sha512_ssse3_glue.c
index 0b6af26832bf..d9fa4c1e063f 100644
--- a/arch/x86/crypto/sha512_ssse3_glue.c
+++ b/arch/x86/crypto/sha512_ssse3_glue.c
@@ -34,205 +34,75 @@
34#include <linux/cryptohash.h> 34#include <linux/cryptohash.h>
35#include <linux/types.h> 35#include <linux/types.h>
36#include <crypto/sha.h> 36#include <crypto/sha.h>
37#include <asm/byteorder.h> 37#include <crypto/sha512_base.h>
38#include <asm/i387.h> 38#include <asm/i387.h>
39#include <asm/xcr.h> 39#include <asm/xcr.h>
40#include <asm/xsave.h> 40#include <asm/xsave.h>
41 41
42#include <linux/string.h> 42#include <linux/string.h>
43 43
44asmlinkage void sha512_transform_ssse3(const char *data, u64 *digest, 44asmlinkage void sha512_transform_ssse3(u64 *digest, const char *data,
45 u64 rounds); 45 u64 rounds);
46#ifdef CONFIG_AS_AVX 46#ifdef CONFIG_AS_AVX
47asmlinkage void sha512_transform_avx(const char *data, u64 *digest, 47asmlinkage void sha512_transform_avx(u64 *digest, const char *data,
48 u64 rounds); 48 u64 rounds);
49#endif 49#endif
50#ifdef CONFIG_AS_AVX2 50#ifdef CONFIG_AS_AVX2
51asmlinkage void sha512_transform_rorx(const char *data, u64 *digest, 51asmlinkage void sha512_transform_rorx(u64 *digest, const char *data,
52 u64 rounds); 52 u64 rounds);
53#endif 53#endif
54 54
55static asmlinkage void (*sha512_transform_asm)(const char *, u64 *, u64); 55static void (*sha512_transform_asm)(u64 *, const char *, u64);
56
57
58static int sha512_ssse3_init(struct shash_desc *desc)
59{
60 struct sha512_state *sctx = shash_desc_ctx(desc);
61
62 sctx->state[0] = SHA512_H0;
63 sctx->state[1] = SHA512_H1;
64 sctx->state[2] = SHA512_H2;
65 sctx->state[3] = SHA512_H3;
66 sctx->state[4] = SHA512_H4;
67 sctx->state[5] = SHA512_H5;
68 sctx->state[6] = SHA512_H6;
69 sctx->state[7] = SHA512_H7;
70 sctx->count[0] = sctx->count[1] = 0;
71
72 return 0;
73}
74 56
75static int __sha512_ssse3_update(struct shash_desc *desc, const u8 *data, 57static int sha512_ssse3_update(struct shash_desc *desc, const u8 *data,
76 unsigned int len, unsigned int partial) 58 unsigned int len)
77{ 59{
78 struct sha512_state *sctx = shash_desc_ctx(desc); 60 struct sha512_state *sctx = shash_desc_ctx(desc);
79 unsigned int done = 0;
80
81 sctx->count[0] += len;
82 if (sctx->count[0] < len)
83 sctx->count[1]++;
84 61
85 if (partial) { 62 if (!irq_fpu_usable() ||
86 done = SHA512_BLOCK_SIZE - partial; 63 (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
87 memcpy(sctx->buf + partial, data, done); 64 return crypto_sha512_update(desc, data, len);
88 sha512_transform_asm(sctx->buf, sctx->state, 1);
89 }
90
91 if (len - done >= SHA512_BLOCK_SIZE) {
92 const unsigned int rounds = (len - done) / SHA512_BLOCK_SIZE;
93 65
94 sha512_transform_asm(data + done, sctx->state, (u64) rounds); 66 /* make sure casting to sha512_block_fn() is safe */
95 67 BUILD_BUG_ON(offsetof(struct sha512_state, state) != 0);
96 done += rounds * SHA512_BLOCK_SIZE;
97 }
98 68
99 memcpy(sctx->buf, data + done, len - done); 69 kernel_fpu_begin();
70 sha512_base_do_update(desc, data, len,
71 (sha512_block_fn *)sha512_transform_asm);
72 kernel_fpu_end();
100 73
101 return 0; 74 return 0;
102} 75}
103 76
104static int sha512_ssse3_update(struct shash_desc *desc, const u8 *data, 77static int sha512_ssse3_finup(struct shash_desc *desc, const u8 *data,
105 unsigned int len) 78 unsigned int len, u8 *out)
106{ 79{
107 struct sha512_state *sctx = shash_desc_ctx(desc); 80 if (!irq_fpu_usable())
108 unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE; 81 return crypto_sha512_finup(desc, data, len, out);
109 int res;
110
111 /* Handle the fast case right here */
112 if (partial + len < SHA512_BLOCK_SIZE) {
113 sctx->count[0] += len;
114 if (sctx->count[0] < len)
115 sctx->count[1]++;
116 memcpy(sctx->buf + partial, data, len);
117
118 return 0;
119 }
120 82
121 if (!irq_fpu_usable()) { 83 kernel_fpu_begin();
122 res = crypto_sha512_update(desc, data, len); 84 if (len)
123 } else { 85 sha512_base_do_update(desc, data, len,
124 kernel_fpu_begin(); 86 (sha512_block_fn *)sha512_transform_asm);
125 res = __sha512_ssse3_update(desc, data, len, partial); 87 sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_transform_asm);
126 kernel_fpu_end(); 88 kernel_fpu_end();
127 }
128 89
129 return res; 90 return sha512_base_finish(desc, out);
130} 91}
131 92
132
133/* Add padding and return the message digest. */ 93/* Add padding and return the message digest. */
134static int sha512_ssse3_final(struct shash_desc *desc, u8 *out) 94static int sha512_ssse3_final(struct shash_desc *desc, u8 *out)
135{ 95{
136 struct sha512_state *sctx = shash_desc_ctx(desc); 96 return sha512_ssse3_finup(desc, NULL, 0, out);
137 unsigned int i, index, padlen;
138 __be64 *dst = (__be64 *)out;
139 __be64 bits[2];
140 static const u8 padding[SHA512_BLOCK_SIZE] = { 0x80, };
141
142 /* save number of bits */
143 bits[1] = cpu_to_be64(sctx->count[0] << 3);
144 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
145
146 /* Pad out to 112 mod 128 and append length */
147 index = sctx->count[0] & 0x7f;
148 padlen = (index < 112) ? (112 - index) : ((128+112) - index);
149
150 if (!irq_fpu_usable()) {
151 crypto_sha512_update(desc, padding, padlen);
152 crypto_sha512_update(desc, (const u8 *)&bits, sizeof(bits));
153 } else {
154 kernel_fpu_begin();
155 /* We need to fill a whole block for __sha512_ssse3_update() */
156 if (padlen <= 112) {
157 sctx->count[0] += padlen;
158 if (sctx->count[0] < padlen)
159 sctx->count[1]++;
160 memcpy(sctx->buf + index, padding, padlen);
161 } else {
162 __sha512_ssse3_update(desc, padding, padlen, index);
163 }
164 __sha512_ssse3_update(desc, (const u8 *)&bits,
165 sizeof(bits), 112);
166 kernel_fpu_end();
167 }
168
169 /* Store state in digest */
170 for (i = 0; i < 8; i++)
171 dst[i] = cpu_to_be64(sctx->state[i]);
172
173 /* Wipe context */
174 memset(sctx, 0, sizeof(*sctx));
175
176 return 0;
177}
178
179static int sha512_ssse3_export(struct shash_desc *desc, void *out)
180{
181 struct sha512_state *sctx = shash_desc_ctx(desc);
182
183 memcpy(out, sctx, sizeof(*sctx));
184
185 return 0;
186}
187
188static int sha512_ssse3_import(struct shash_desc *desc, const void *in)
189{
190 struct sha512_state *sctx = shash_desc_ctx(desc);
191
192 memcpy(sctx, in, sizeof(*sctx));
193
194 return 0;
195}
196
197static int sha384_ssse3_init(struct shash_desc *desc)
198{
199 struct sha512_state *sctx = shash_desc_ctx(desc);
200
201 sctx->state[0] = SHA384_H0;
202 sctx->state[1] = SHA384_H1;
203 sctx->state[2] = SHA384_H2;
204 sctx->state[3] = SHA384_H3;
205 sctx->state[4] = SHA384_H4;
206 sctx->state[5] = SHA384_H5;
207 sctx->state[6] = SHA384_H6;
208 sctx->state[7] = SHA384_H7;
209
210 sctx->count[0] = sctx->count[1] = 0;
211
212 return 0;
213}
214
215static int sha384_ssse3_final(struct shash_desc *desc, u8 *hash)
216{
217 u8 D[SHA512_DIGEST_SIZE];
218
219 sha512_ssse3_final(desc, D);
220
221 memcpy(hash, D, SHA384_DIGEST_SIZE);
222 memzero_explicit(D, SHA512_DIGEST_SIZE);
223
224 return 0;
225} 97}
226 98
227static struct shash_alg algs[] = { { 99static struct shash_alg algs[] = { {
228 .digestsize = SHA512_DIGEST_SIZE, 100 .digestsize = SHA512_DIGEST_SIZE,
229 .init = sha512_ssse3_init, 101 .init = sha512_base_init,
230 .update = sha512_ssse3_update, 102 .update = sha512_ssse3_update,
231 .final = sha512_ssse3_final, 103 .final = sha512_ssse3_final,
232 .export = sha512_ssse3_export, 104 .finup = sha512_ssse3_finup,
233 .import = sha512_ssse3_import,
234 .descsize = sizeof(struct sha512_state), 105 .descsize = sizeof(struct sha512_state),
235 .statesize = sizeof(struct sha512_state),
236 .base = { 106 .base = {
237 .cra_name = "sha512", 107 .cra_name = "sha512",
238 .cra_driver_name = "sha512-ssse3", 108 .cra_driver_name = "sha512-ssse3",
@@ -243,13 +113,11 @@ static struct shash_alg algs[] = { {
243 } 113 }
244}, { 114}, {
245 .digestsize = SHA384_DIGEST_SIZE, 115 .digestsize = SHA384_DIGEST_SIZE,
246 .init = sha384_ssse3_init, 116 .init = sha384_base_init,
247 .update = sha512_ssse3_update, 117 .update = sha512_ssse3_update,
248 .final = sha384_ssse3_final, 118 .final = sha512_ssse3_final,
249 .export = sha512_ssse3_export, 119 .finup = sha512_ssse3_finup,
250 .import = sha512_ssse3_import,
251 .descsize = sizeof(struct sha512_state), 120 .descsize = sizeof(struct sha512_state),
252 .statesize = sizeof(struct sha512_state),
253 .base = { 121 .base = {
254 .cra_name = "sha384", 122 .cra_name = "sha384",
255 .cra_driver_name = "sha384-ssse3", 123 .cra_driver_name = "sha384-ssse3",
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-13 01:18:51 -0500