1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /* Glue code for DES encryption optimized for
3 *
4 * Copyright (C) 2012 David S. Miller <davem@d
5 */
6
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fm
8
9 #include <linux/crypto.h>
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/mm.h>
13 #include <linux/types.h>
14 #include <crypto/algapi.h>
15 #include <crypto/internal/des.h>
16 #include <crypto/internal/skcipher.h>
17
18 #include <asm/fpumacro.h>
19 #include <asm/pstate.h>
20 #include <asm/elf.h>
21
22 #include "opcodes.h"
23
24 struct des_sparc64_ctx {
25 u64 encrypt_expkey[DES_EXPKEY_WORDS /
26 u64 decrypt_expkey[DES_EXPKEY_WORDS /
27 };
28
29 struct des3_ede_sparc64_ctx {
30 u64 encrypt_expkey[DES3_EDE_EXPKEY_WOR
31 u64 decrypt_expkey[DES3_EDE_EXPKEY_WOR
32 };
33
34 static void encrypt_to_decrypt(u64 *d, const u
35 {
36 const u64 *s = e + (DES_EXPKEY_WORDS /
37 int i;
38
39 for (i = 0; i < DES_EXPKEY_WORDS / 2;
40 *d++ = *s--;
41 }
42
43 extern void des_sparc64_key_expand(const u32 *
44
45 static int des_set_key(struct crypto_tfm *tfm,
46 unsigned int keylen)
47 {
48 struct des_sparc64_ctx *dctx = crypto_
49 int err;
50
51 /* Even though we have special instruc
52 * we call des_verify_key() so that we
53 * weak key detection code.
54 */
55 err = crypto_des_verify_key(tfm, key);
56 if (err)
57 return err;
58
59 des_sparc64_key_expand((const u32 *) k
60 encrypt_to_decrypt(&dctx->decrypt_expk
61
62 return 0;
63 }
64
65 static int des_set_key_skcipher(struct crypto_
66 unsigned int k
67 {
68 return des_set_key(crypto_skcipher_tfm
69 }
70
71 extern void des_sparc64_crypt(const u64 *key,
72 u64 *output);
73
74 static void sparc_des_encrypt(struct crypto_tf
75 {
76 struct des_sparc64_ctx *ctx = crypto_t
77 const u64 *K = ctx->encrypt_expkey;
78
79 des_sparc64_crypt(K, (const u64 *) src
80 }
81
82 static void sparc_des_decrypt(struct crypto_tf
83 {
84 struct des_sparc64_ctx *ctx = crypto_t
85 const u64 *K = ctx->decrypt_expkey;
86
87 des_sparc64_crypt(K, (const u64 *) src
88 }
89
90 extern void des_sparc64_load_keys(const u64 *k
91
92 extern void des_sparc64_ecb_crypt(const u64 *i
93 unsigned int
94
95 static int __ecb_crypt(struct skcipher_request
96 {
97 struct crypto_skcipher *tfm = crypto_s
98 const struct des_sparc64_ctx *ctx = cr
99 struct skcipher_walk walk;
100 unsigned int nbytes;
101 int err;
102
103 err = skcipher_walk_virt(&walk, req, t
104 if (err)
105 return err;
106
107 if (encrypt)
108 des_sparc64_load_keys(&ctx->en
109 else
110 des_sparc64_load_keys(&ctx->de
111 while ((nbytes = walk.nbytes) != 0) {
112 des_sparc64_ecb_crypt(walk.src
113 round_do
114 err = skcipher_walk_done(&walk
115 }
116 fprs_write(0);
117 return err;
118 }
119
120 static int ecb_encrypt(struct skcipher_request
121 {
122 return __ecb_crypt(req, true);
123 }
124
125 static int ecb_decrypt(struct skcipher_request
126 {
127 return __ecb_crypt(req, false);
128 }
129
130 extern void des_sparc64_cbc_encrypt(const u64
131 unsigned i
132
133 extern void des_sparc64_cbc_decrypt(const u64
134 unsigned i
135
136 static int __cbc_crypt(struct skcipher_request
137 {
138 struct crypto_skcipher *tfm = crypto_s
139 const struct des_sparc64_ctx *ctx = cr
140 struct skcipher_walk walk;
141 unsigned int nbytes;
142 int err;
143
144 err = skcipher_walk_virt(&walk, req, t
145 if (err)
146 return err;
147
148 if (encrypt)
149 des_sparc64_load_keys(&ctx->en
150 else
151 des_sparc64_load_keys(&ctx->de
152 while ((nbytes = walk.nbytes) != 0) {
153 if (encrypt)
154 des_sparc64_cbc_encryp
155
156
157
158
159 else
160 des_sparc64_cbc_decryp
161
162
163
164
165 err = skcipher_walk_done(&walk
166 }
167 fprs_write(0);
168 return err;
169 }
170
171 static int cbc_encrypt(struct skcipher_request
172 {
173 return __cbc_crypt(req, true);
174 }
175
176 static int cbc_decrypt(struct skcipher_request
177 {
178 return __cbc_crypt(req, false);
179 }
180
181 static int des3_ede_set_key(struct crypto_tfm
182 unsigned int keyle
183 {
184 struct des3_ede_sparc64_ctx *dctx = cr
185 u64 k1[DES_EXPKEY_WORDS / 2];
186 u64 k2[DES_EXPKEY_WORDS / 2];
187 u64 k3[DES_EXPKEY_WORDS / 2];
188 int err;
189
190 err = crypto_des3_ede_verify_key(tfm,
191 if (err)
192 return err;
193
194 des_sparc64_key_expand((const u32 *)ke
195 key += DES_KEY_SIZE;
196 des_sparc64_key_expand((const u32 *)ke
197 key += DES_KEY_SIZE;
198 des_sparc64_key_expand((const u32 *)ke
199
200 memcpy(&dctx->encrypt_expkey[0], &k1[0
201 encrypt_to_decrypt(&dctx->encrypt_expk
202 memcpy(&dctx->encrypt_expkey[(DES_EXPK
203 &k3[0], sizeof(k3));
204
205 encrypt_to_decrypt(&dctx->decrypt_expk
206 memcpy(&dctx->decrypt_expkey[DES_EXPKE
207 &k2[0], sizeof(k2));
208 encrypt_to_decrypt(&dctx->decrypt_expk
209 &k1[0]);
210
211 return 0;
212 }
213
214 static int des3_ede_set_key_skcipher(struct cr
215 unsigned
216 {
217 return des3_ede_set_key(crypto_skciphe
218 }
219
220 extern void des3_ede_sparc64_crypt(const u64 *
221 u64 *output
222
223 static void sparc_des3_ede_encrypt(struct cryp
224 {
225 struct des3_ede_sparc64_ctx *ctx = cry
226 const u64 *K = ctx->encrypt_expkey;
227
228 des3_ede_sparc64_crypt(K, (const u64 *
229 }
230
231 static void sparc_des3_ede_decrypt(struct cryp
232 {
233 struct des3_ede_sparc64_ctx *ctx = cry
234 const u64 *K = ctx->decrypt_expkey;
235
236 des3_ede_sparc64_crypt(K, (const u64 *
237 }
238
239 extern void des3_ede_sparc64_load_keys(const u
240
241 extern void des3_ede_sparc64_ecb_crypt(const u
242 u64 *ou
243
244 static int __ecb3_crypt(struct skcipher_reques
245 {
246 struct crypto_skcipher *tfm = crypto_s
247 const struct des3_ede_sparc64_ctx *ctx
248 struct skcipher_walk walk;
249 const u64 *K;
250 unsigned int nbytes;
251 int err;
252
253 err = skcipher_walk_virt(&walk, req, t
254 if (err)
255 return err;
256
257 if (encrypt)
258 K = &ctx->encrypt_expkey[0];
259 else
260 K = &ctx->decrypt_expkey[0];
261 des3_ede_sparc64_load_keys(K);
262 while ((nbytes = walk.nbytes) != 0) {
263 des3_ede_sparc64_ecb_crypt(K,
264 wal
265 rou
266 err = skcipher_walk_done(&walk
267 }
268 fprs_write(0);
269 return err;
270 }
271
272 static int ecb3_encrypt(struct skcipher_reques
273 {
274 return __ecb3_crypt(req, true);
275 }
276
277 static int ecb3_decrypt(struct skcipher_reques
278 {
279 return __ecb3_crypt(req, false);
280 }
281
282 extern void des3_ede_sparc64_cbc_encrypt(const
283 u64 *
284 u64 *
285
286 extern void des3_ede_sparc64_cbc_decrypt(const
287 u64 *
288 u64 *
289
290 static int __cbc3_crypt(struct skcipher_reques
291 {
292 struct crypto_skcipher *tfm = crypto_s
293 const struct des3_ede_sparc64_ctx *ctx
294 struct skcipher_walk walk;
295 const u64 *K;
296 unsigned int nbytes;
297 int err;
298
299 err = skcipher_walk_virt(&walk, req, t
300 if (err)
301 return err;
302
303 if (encrypt)
304 K = &ctx->encrypt_expkey[0];
305 else
306 K = &ctx->decrypt_expkey[0];
307 des3_ede_sparc64_load_keys(K);
308 while ((nbytes = walk.nbytes) != 0) {
309 if (encrypt)
310 des3_ede_sparc64_cbc_e
311
312
313
314
315 else
316 des3_ede_sparc64_cbc_d
317
318
319
320
321 err = skcipher_walk_done(&walk
322 }
323 fprs_write(0);
324 return err;
325 }
326
327 static int cbc3_encrypt(struct skcipher_reques
328 {
329 return __cbc3_crypt(req, true);
330 }
331
332 static int cbc3_decrypt(struct skcipher_reques
333 {
334 return __cbc3_crypt(req, false);
335 }
336
337 static struct crypto_alg cipher_algs[] = {
338 {
339 .cra_name = "des
340 .cra_driver_name = "des
341 .cra_priority = SPAR
342 .cra_flags = CRYP
343 .cra_blocksize = DES_
344 .cra_ctxsize = size
345 .cra_alignmask = 7,
346 .cra_module = THIS
347 .cra_u = {
348 .cipher = {
349 .cia_min_keysi
350 .cia_max_keysi
351 .cia_setkey
352 .cia_encrypt
353 .cia_decrypt
354 }
355 }
356 }, {
357 .cra_name = "des
358 .cra_driver_name = "des
359 .cra_priority = SPAR
360 .cra_flags = CRYP
361 .cra_blocksize = DES3
362 .cra_ctxsize = size
363 .cra_alignmask = 7,
364 .cra_module = THIS
365 .cra_u = {
366 .cipher = {
367 .cia_min_keysi
368 .cia_max_keysi
369 .cia_setkey
370 .cia_encrypt
371 .cia_decrypt
372 }
373 }
374 }
375 };
376
377 static struct skcipher_alg skcipher_algs[] = {
378 {
379 .base.cra_name = "ecb
380 .base.cra_driver_name = "ecb
381 .base.cra_priority = SPAR
382 .base.cra_blocksize = DES_
383 .base.cra_ctxsize = size
384 .base.cra_alignmask = 7,
385 .base.cra_module = THIS
386 .min_keysize = DES_
387 .max_keysize = DES_
388 .setkey = des_
389 .encrypt = ecb_
390 .decrypt = ecb_
391 }, {
392 .base.cra_name = "cbc
393 .base.cra_driver_name = "cbc
394 .base.cra_priority = SPAR
395 .base.cra_blocksize = DES_
396 .base.cra_ctxsize = size
397 .base.cra_alignmask = 7,
398 .base.cra_module = THIS
399 .min_keysize = DES_
400 .max_keysize = DES_
401 .ivsize = DES_
402 .setkey = des_
403 .encrypt = cbc_
404 .decrypt = cbc_
405 }, {
406 .base.cra_name = "ecb
407 .base.cra_driver_name = "ecb
408 .base.cra_priority = SPAR
409 .base.cra_blocksize = DES3
410 .base.cra_ctxsize = size
411 .base.cra_alignmask = 7,
412 .base.cra_module = THIS
413 .min_keysize = DES3
414 .max_keysize = DES3
415 .setkey = des3
416 .encrypt = ecb3
417 .decrypt = ecb3
418 }, {
419 .base.cra_name = "cbc
420 .base.cra_driver_name = "cbc
421 .base.cra_priority = SPAR
422 .base.cra_blocksize = DES3
423 .base.cra_ctxsize = size
424 .base.cra_alignmask = 7,
425 .base.cra_module = THIS
426 .min_keysize = DES3
427 .max_keysize = DES3
428 .ivsize = DES3
429 .setkey = des3
430 .encrypt = cbc3
431 .decrypt = cbc3
432 }
433 };
434
435 static bool __init sparc64_has_des_opcode(void
436 {
437 unsigned long cfr;
438
439 if (!(sparc64_elf_hwcap & HWCAP_SPARC_
440 return false;
441
442 __asm__ __volatile__("rd %%asr26, %0"
443 if (!(cfr & CFR_DES))
444 return false;
445
446 return true;
447 }
448
449 static int __init des_sparc64_mod_init(void)
450 {
451 int err;
452
453 if (!sparc64_has_des_opcode()) {
454 pr_info("sparc64 des opcodes n
455 return -ENODEV;
456 }
457 pr_info("Using sparc64 des opcodes opt
458 err = crypto_register_algs(cipher_algs
459 if (err)
460 return err;
461 err = crypto_register_skciphers(skciph
462 ARRAY_
463 if (err)
464 crypto_unregister_algs(cipher_
465 return err;
466 }
467
468 static void __exit des_sparc64_mod_fini(void)
469 {
470 crypto_unregister_algs(cipher_algs, AR
471 crypto_unregister_skciphers(skcipher_a
472 }
473
474 module_init(des_sparc64_mod_init);
475 module_exit(des_sparc64_mod_fini);
476
477 MODULE_LICENSE("GPL");
478 MODULE_DESCRIPTION("DES & Triple DES EDE Ciphe
479
480 MODULE_ALIAS_CRYPTO("des");
481 MODULE_ALIAS_CRYPTO("des3_ede");
482
483 #include "crop_devid.c"
484
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.