1 /*
2 * Cryptographic API.
3 *
4 * Glue code for the SHA512 Secure Hash Algorithm assembler
5 * implementation using supplemental SSE3 / AVX / AVX2 instructions.
6 *
7 * This file is based on sha512_generic.c
8 *
9 * Copyright (C) 2013 Intel Corporation
10 * Author: Tim Chen <tim.c.chen@linux.intel.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
15 * any later version.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
21 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 *
26 */
27
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29
30 #include <crypto/internal/hash.h>
31 #include <crypto/internal/simd.h>
32 #include <linux/init.h>
33 #include <linux/module.h>
34 #include <linux/mm.h>
35 #include <linux/string.h>
36 #include <linux/types.h>
37 #include <crypto/sha.h>
38 #include <crypto/sha512_base.h>
39 #include <asm/simd.h>
40
41 asmlinkage void sha512_transform_ssse3(struct sha512_state *state,
42 const u8 *data, int blocks);
43
sha512_update(struct shash_desc * desc,const u8 * data,unsigned int len,sha512_block_fn * sha512_xform)44 static int sha512_update(struct shash_desc *desc, const u8 *data,
45 unsigned int len, sha512_block_fn *sha512_xform)
46 {
47 struct sha512_state *sctx = shash_desc_ctx(desc);
48
49 if (!crypto_simd_usable() ||
50 (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
51 return crypto_sha512_update(desc, data, len);
52
53 /*
54 * Make sure struct sha512_state begins directly with the SHA512
55 * 512-bit internal state, as this is what the asm functions expect.
56 */
57 BUILD_BUG_ON(offsetof(struct sha512_state, state) != 0);
58
59 kernel_fpu_begin();
60 sha512_base_do_update(desc, data, len, sha512_xform);
61 kernel_fpu_end();
62
63 return 0;
64 }
65
sha512_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out,sha512_block_fn * sha512_xform)66 static int sha512_finup(struct shash_desc *desc, const u8 *data,
67 unsigned int len, u8 *out, sha512_block_fn *sha512_xform)
68 {
69 if (!crypto_simd_usable())
70 return crypto_sha512_finup(desc, data, len, out);
71
72 kernel_fpu_begin();
73 if (len)
74 sha512_base_do_update(desc, data, len, sha512_xform);
75 sha512_base_do_finalize(desc, sha512_xform);
76 kernel_fpu_end();
77
78 return sha512_base_finish(desc, out);
79 }
80
sha512_ssse3_update(struct shash_desc * desc,const u8 * data,unsigned int len)81 static int sha512_ssse3_update(struct shash_desc *desc, const u8 *data,
82 unsigned int len)
83 {
84 return sha512_update(desc, data, len, sha512_transform_ssse3);
85 }
86
sha512_ssse3_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)87 static int sha512_ssse3_finup(struct shash_desc *desc, const u8 *data,
88 unsigned int len, u8 *out)
89 {
90 return sha512_finup(desc, data, len, out, sha512_transform_ssse3);
91 }
92
93 /* Add padding and return the message digest. */
sha512_ssse3_final(struct shash_desc * desc,u8 * out)94 static int sha512_ssse3_final(struct shash_desc *desc, u8 *out)
95 {
96 return sha512_ssse3_finup(desc, NULL, 0, out);
97 }
98
99 static struct shash_alg sha512_ssse3_algs[] = { {
100 .digestsize = SHA512_DIGEST_SIZE,
101 .init = sha512_base_init,
102 .update = sha512_ssse3_update,
103 .final = sha512_ssse3_final,
104 .finup = sha512_ssse3_finup,
105 .descsize = sizeof(struct sha512_state),
106 .base = {
107 .cra_name = "sha512",
108 .cra_driver_name = "sha512-ssse3",
109 .cra_priority = 150,
110 .cra_blocksize = SHA512_BLOCK_SIZE,
111 .cra_module = THIS_MODULE,
112 }
113 }, {
114 .digestsize = SHA384_DIGEST_SIZE,
115 .init = sha384_base_init,
116 .update = sha512_ssse3_update,
117 .final = sha512_ssse3_final,
118 .finup = sha512_ssse3_finup,
119 .descsize = sizeof(struct sha512_state),
120 .base = {
121 .cra_name = "sha384",
122 .cra_driver_name = "sha384-ssse3",
123 .cra_priority = 150,
124 .cra_blocksize = SHA384_BLOCK_SIZE,
125 .cra_module = THIS_MODULE,
126 }
127 } };
128
register_sha512_ssse3(void)129 static int register_sha512_ssse3(void)
130 {
131 if (boot_cpu_has(X86_FEATURE_SSSE3))
132 return crypto_register_shashes(sha512_ssse3_algs,
133 ARRAY_SIZE(sha512_ssse3_algs));
134 return 0;
135 }
136
unregister_sha512_ssse3(void)137 static void unregister_sha512_ssse3(void)
138 {
139 if (boot_cpu_has(X86_FEATURE_SSSE3))
140 crypto_unregister_shashes(sha512_ssse3_algs,
141 ARRAY_SIZE(sha512_ssse3_algs));
142 }
143
144 asmlinkage void sha512_transform_avx(struct sha512_state *state,
145 const u8 *data, int blocks);
avx_usable(void)146 static bool avx_usable(void)
147 {
148 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
149 if (boot_cpu_has(X86_FEATURE_AVX))
150 pr_info("AVX detected but unusable.\n");
151 return false;
152 }
153
154 return true;
155 }
156
sha512_avx_update(struct shash_desc * desc,const u8 * data,unsigned int len)157 static int sha512_avx_update(struct shash_desc *desc, const u8 *data,
158 unsigned int len)
159 {
160 return sha512_update(desc, data, len, sha512_transform_avx);
161 }
162
sha512_avx_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)163 static int sha512_avx_finup(struct shash_desc *desc, const u8 *data,
164 unsigned int len, u8 *out)
165 {
166 return sha512_finup(desc, data, len, out, sha512_transform_avx);
167 }
168
169 /* Add padding and return the message digest. */
sha512_avx_final(struct shash_desc * desc,u8 * out)170 static int sha512_avx_final(struct shash_desc *desc, u8 *out)
171 {
172 return sha512_avx_finup(desc, NULL, 0, out);
173 }
174
175 static struct shash_alg sha512_avx_algs[] = { {
176 .digestsize = SHA512_DIGEST_SIZE,
177 .init = sha512_base_init,
178 .update = sha512_avx_update,
179 .final = sha512_avx_final,
180 .finup = sha512_avx_finup,
181 .descsize = sizeof(struct sha512_state),
182 .base = {
183 .cra_name = "sha512",
184 .cra_driver_name = "sha512-avx",
185 .cra_priority = 160,
186 .cra_blocksize = SHA512_BLOCK_SIZE,
187 .cra_module = THIS_MODULE,
188 }
189 }, {
190 .digestsize = SHA384_DIGEST_SIZE,
191 .init = sha384_base_init,
192 .update = sha512_avx_update,
193 .final = sha512_avx_final,
194 .finup = sha512_avx_finup,
195 .descsize = sizeof(struct sha512_state),
196 .base = {
197 .cra_name = "sha384",
198 .cra_driver_name = "sha384-avx",
199 .cra_priority = 160,
200 .cra_blocksize = SHA384_BLOCK_SIZE,
201 .cra_module = THIS_MODULE,
202 }
203 } };
204
register_sha512_avx(void)205 static int register_sha512_avx(void)
206 {
207 if (avx_usable())
208 return crypto_register_shashes(sha512_avx_algs,
209 ARRAY_SIZE(sha512_avx_algs));
210 return 0;
211 }
212
unregister_sha512_avx(void)213 static void unregister_sha512_avx(void)
214 {
215 if (avx_usable())
216 crypto_unregister_shashes(sha512_avx_algs,
217 ARRAY_SIZE(sha512_avx_algs));
218 }
219
220 asmlinkage void sha512_transform_rorx(struct sha512_state *state,
221 const u8 *data, int blocks);
222
sha512_avx2_update(struct shash_desc * desc,const u8 * data,unsigned int len)223 static int sha512_avx2_update(struct shash_desc *desc, const u8 *data,
224 unsigned int len)
225 {
226 return sha512_update(desc, data, len, sha512_transform_rorx);
227 }
228
sha512_avx2_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)229 static int sha512_avx2_finup(struct shash_desc *desc, const u8 *data,
230 unsigned int len, u8 *out)
231 {
232 return sha512_finup(desc, data, len, out, sha512_transform_rorx);
233 }
234
235 /* Add padding and return the message digest. */
sha512_avx2_final(struct shash_desc * desc,u8 * out)236 static int sha512_avx2_final(struct shash_desc *desc, u8 *out)
237 {
238 return sha512_avx2_finup(desc, NULL, 0, out);
239 }
240
241 static struct shash_alg sha512_avx2_algs[] = { {
242 .digestsize = SHA512_DIGEST_SIZE,
243 .init = sha512_base_init,
244 .update = sha512_avx2_update,
245 .final = sha512_avx2_final,
246 .finup = sha512_avx2_finup,
247 .descsize = sizeof(struct sha512_state),
248 .base = {
249 .cra_name = "sha512",
250 .cra_driver_name = "sha512-avx2",
251 .cra_priority = 170,
252 .cra_blocksize = SHA512_BLOCK_SIZE,
253 .cra_module = THIS_MODULE,
254 }
255 }, {
256 .digestsize = SHA384_DIGEST_SIZE,
257 .init = sha384_base_init,
258 .update = sha512_avx2_update,
259 .final = sha512_avx2_final,
260 .finup = sha512_avx2_finup,
261 .descsize = sizeof(struct sha512_state),
262 .base = {
263 .cra_name = "sha384",
264 .cra_driver_name = "sha384-avx2",
265 .cra_priority = 170,
266 .cra_blocksize = SHA384_BLOCK_SIZE,
267 .cra_module = THIS_MODULE,
268 }
269 } };
270
avx2_usable(void)271 static bool avx2_usable(void)
272 {
273 if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) &&
274 boot_cpu_has(X86_FEATURE_BMI2))
275 return true;
276
277 return false;
278 }
279
register_sha512_avx2(void)280 static int register_sha512_avx2(void)
281 {
282 if (avx2_usable())
283 return crypto_register_shashes(sha512_avx2_algs,
284 ARRAY_SIZE(sha512_avx2_algs));
285 return 0;
286 }
287
unregister_sha512_avx2(void)288 static void unregister_sha512_avx2(void)
289 {
290 if (avx2_usable())
291 crypto_unregister_shashes(sha512_avx2_algs,
292 ARRAY_SIZE(sha512_avx2_algs));
293 }
294
sha512_ssse3_mod_init(void)295 static int __init sha512_ssse3_mod_init(void)
296 {
297
298 if (register_sha512_ssse3())
299 goto fail;
300
301 if (register_sha512_avx()) {
302 unregister_sha512_ssse3();
303 goto fail;
304 }
305
306 if (register_sha512_avx2()) {
307 unregister_sha512_avx();
308 unregister_sha512_ssse3();
309 goto fail;
310 }
311
312 return 0;
313 fail:
314 return -ENODEV;
315 }
316
sha512_ssse3_mod_fini(void)317 static void __exit sha512_ssse3_mod_fini(void)
318 {
319 unregister_sha512_avx2();
320 unregister_sha512_avx();
321 unregister_sha512_ssse3();
322 }
323
324 module_init(sha512_ssse3_mod_init);
325 module_exit(sha512_ssse3_mod_fini);
326
327 MODULE_LICENSE("GPL");
328 MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, Supplemental SSE3 accelerated");
329
330 MODULE_ALIAS_CRYPTO("sha512");
331 MODULE_ALIAS_CRYPTO("sha512-ssse3");
332 MODULE_ALIAS_CRYPTO("sha512-avx");
333 MODULE_ALIAS_CRYPTO("sha512-avx2");
334 MODULE_ALIAS_CRYPTO("sha384");
335 MODULE_ALIAS_CRYPTO("sha384-ssse3");
336 MODULE_ALIAS_CRYPTO("sha384-avx");
337 MODULE_ALIAS_CRYPTO("sha384-avx2");
338