4 * Glue code for the SHA512 Secure Hash Algorithm assembler
5 * implementation using supplemental SSE3 / AVX / AVX2 instructions.
7 * This file is based on sha512_generic.c
9 * Copyright (C) 2013 Intel Corporation
10 * Author: Tim Chen <tim.c.chen@linux.intel.com>
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)
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
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30 #include <crypto/internal/hash.h>
31 #include <crypto/internal/simd.h>
32 #include <linux/init.h>
33 #include <linux/module.h>
35 #include <linux/cryptohash.h>
36 #include <linux/string.h>
37 #include <linux/types.h>
38 #include <crypto/sha.h>
39 #include <crypto/sha512_base.h>
42 asmlinkage void sha512_transform_ssse3(struct sha512_state *state,
43 const u8 *data, int blocks);
45 static int sha512_update(struct shash_desc *desc, const u8 *data,
46 unsigned int len, sha512_block_fn *sha512_xform)
48 struct sha512_state *sctx = shash_desc_ctx(desc);
50 if (!crypto_simd_usable() ||
51 (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
52 return crypto_sha512_update(desc, data, len);
55 * Make sure struct sha512_state begins directly with the SHA512
56 * 512-bit internal state, as this is what the asm functions expect.
58 BUILD_BUG_ON(offsetof(struct sha512_state, state) != 0);
61 sha512_base_do_update(desc, data, len, sha512_xform);
67 static int sha512_finup(struct shash_desc *desc, const u8 *data,
68 unsigned int len, u8 *out, sha512_block_fn *sha512_xform)
70 if (!crypto_simd_usable())
71 return crypto_sha512_finup(desc, data, len, out);
75 sha512_base_do_update(desc, data, len, sha512_xform);
76 sha512_base_do_finalize(desc, sha512_xform);
79 return sha512_base_finish(desc, out);
82 static int sha512_ssse3_update(struct shash_desc *desc, const u8 *data,
85 return sha512_update(desc, data, len, sha512_transform_ssse3);
88 static int sha512_ssse3_finup(struct shash_desc *desc, const u8 *data,
89 unsigned int len, u8 *out)
91 return sha512_finup(desc, data, len, out, sha512_transform_ssse3);
94 /* Add padding and return the message digest. */
95 static int sha512_ssse3_final(struct shash_desc *desc, u8 *out)
97 return sha512_ssse3_finup(desc, NULL, 0, out);
100 static struct shash_alg sha512_ssse3_algs[] = { {
101 .digestsize = SHA512_DIGEST_SIZE,
102 .init = sha512_base_init,
103 .update = sha512_ssse3_update,
104 .final = sha512_ssse3_final,
105 .finup = sha512_ssse3_finup,
106 .descsize = sizeof(struct sha512_state),
108 .cra_name = "sha512",
109 .cra_driver_name = "sha512-ssse3",
111 .cra_blocksize = SHA512_BLOCK_SIZE,
112 .cra_module = THIS_MODULE,
115 .digestsize = SHA384_DIGEST_SIZE,
116 .init = sha384_base_init,
117 .update = sha512_ssse3_update,
118 .final = sha512_ssse3_final,
119 .finup = sha512_ssse3_finup,
120 .descsize = sizeof(struct sha512_state),
122 .cra_name = "sha384",
123 .cra_driver_name = "sha384-ssse3",
125 .cra_blocksize = SHA384_BLOCK_SIZE,
126 .cra_module = THIS_MODULE,
130 static int register_sha512_ssse3(void)
132 if (boot_cpu_has(X86_FEATURE_SSSE3))
133 return crypto_register_shashes(sha512_ssse3_algs,
134 ARRAY_SIZE(sha512_ssse3_algs));
138 static void unregister_sha512_ssse3(void)
140 if (boot_cpu_has(X86_FEATURE_SSSE3))
141 crypto_unregister_shashes(sha512_ssse3_algs,
142 ARRAY_SIZE(sha512_ssse3_algs));
145 asmlinkage void sha512_transform_avx(struct sha512_state *state,
146 const u8 *data, int blocks);
147 static bool avx_usable(void)
149 if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
150 if (boot_cpu_has(X86_FEATURE_AVX))
151 pr_info("AVX detected but unusable.\n");
158 static int sha512_avx_update(struct shash_desc *desc, const u8 *data,
161 return sha512_update(desc, data, len, sha512_transform_avx);
164 static int sha512_avx_finup(struct shash_desc *desc, const u8 *data,
165 unsigned int len, u8 *out)
167 return sha512_finup(desc, data, len, out, sha512_transform_avx);
170 /* Add padding and return the message digest. */
171 static int sha512_avx_final(struct shash_desc *desc, u8 *out)
173 return sha512_avx_finup(desc, NULL, 0, out);
176 static struct shash_alg sha512_avx_algs[] = { {
177 .digestsize = SHA512_DIGEST_SIZE,
178 .init = sha512_base_init,
179 .update = sha512_avx_update,
180 .final = sha512_avx_final,
181 .finup = sha512_avx_finup,
182 .descsize = sizeof(struct sha512_state),
184 .cra_name = "sha512",
185 .cra_driver_name = "sha512-avx",
187 .cra_blocksize = SHA512_BLOCK_SIZE,
188 .cra_module = THIS_MODULE,
191 .digestsize = SHA384_DIGEST_SIZE,
192 .init = sha384_base_init,
193 .update = sha512_avx_update,
194 .final = sha512_avx_final,
195 .finup = sha512_avx_finup,
196 .descsize = sizeof(struct sha512_state),
198 .cra_name = "sha384",
199 .cra_driver_name = "sha384-avx",
201 .cra_blocksize = SHA384_BLOCK_SIZE,
202 .cra_module = THIS_MODULE,
206 static int register_sha512_avx(void)
209 return crypto_register_shashes(sha512_avx_algs,
210 ARRAY_SIZE(sha512_avx_algs));
214 static void unregister_sha512_avx(void)
217 crypto_unregister_shashes(sha512_avx_algs,
218 ARRAY_SIZE(sha512_avx_algs));
221 #if defined(CONFIG_AS_AVX2)
222 asmlinkage void sha512_transform_rorx(struct sha512_state *state,
223 const u8 *data, int blocks);
225 static int sha512_avx2_update(struct shash_desc *desc, const u8 *data,
228 return sha512_update(desc, data, len, sha512_transform_rorx);
231 static int sha512_avx2_finup(struct shash_desc *desc, const u8 *data,
232 unsigned int len, u8 *out)
234 return sha512_finup(desc, data, len, out, sha512_transform_rorx);
237 /* Add padding and return the message digest. */
238 static int sha512_avx2_final(struct shash_desc *desc, u8 *out)
240 return sha512_avx2_finup(desc, NULL, 0, out);
243 static struct shash_alg sha512_avx2_algs[] = { {
244 .digestsize = SHA512_DIGEST_SIZE,
245 .init = sha512_base_init,
246 .update = sha512_avx2_update,
247 .final = sha512_avx2_final,
248 .finup = sha512_avx2_finup,
249 .descsize = sizeof(struct sha512_state),
251 .cra_name = "sha512",
252 .cra_driver_name = "sha512-avx2",
254 .cra_blocksize = SHA512_BLOCK_SIZE,
255 .cra_module = THIS_MODULE,
258 .digestsize = SHA384_DIGEST_SIZE,
259 .init = sha384_base_init,
260 .update = sha512_avx2_update,
261 .final = sha512_avx2_final,
262 .finup = sha512_avx2_finup,
263 .descsize = sizeof(struct sha512_state),
265 .cra_name = "sha384",
266 .cra_driver_name = "sha384-avx2",
268 .cra_blocksize = SHA384_BLOCK_SIZE,
269 .cra_module = THIS_MODULE,
273 static bool avx2_usable(void)
275 if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) &&
276 boot_cpu_has(X86_FEATURE_BMI2))
282 static int register_sha512_avx2(void)
285 return crypto_register_shashes(sha512_avx2_algs,
286 ARRAY_SIZE(sha512_avx2_algs));
290 static void unregister_sha512_avx2(void)
293 crypto_unregister_shashes(sha512_avx2_algs,
294 ARRAY_SIZE(sha512_avx2_algs));
297 static inline int register_sha512_avx2(void) { return 0; }
298 static inline void unregister_sha512_avx2(void) { }
301 static int __init sha512_ssse3_mod_init(void)
304 if (register_sha512_ssse3())
307 if (register_sha512_avx()) {
308 unregister_sha512_ssse3();
312 if (register_sha512_avx2()) {
313 unregister_sha512_avx();
314 unregister_sha512_ssse3();
323 static void __exit sha512_ssse3_mod_fini(void)
325 unregister_sha512_avx2();
326 unregister_sha512_avx();
327 unregister_sha512_ssse3();
330 module_init(sha512_ssse3_mod_init);
331 module_exit(sha512_ssse3_mod_fini);
333 MODULE_LICENSE("GPL");
334 MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, Supplemental SSE3 accelerated");
336 MODULE_ALIAS_CRYPTO("sha512");
337 MODULE_ALIAS_CRYPTO("sha512-ssse3");
338 MODULE_ALIAS_CRYPTO("sha512-avx");
339 MODULE_ALIAS_CRYPTO("sha512-avx2");
340 MODULE_ALIAS_CRYPTO("sha384");
341 MODULE_ALIAS_CRYPTO("sha384-ssse3");
342 MODULE_ALIAS_CRYPTO("sha384-avx");
343 MODULE_ALIAS_CRYPTO("sha384-avx2");