1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /* Glue code for AES encryption optimized for
3 *
4 * This is based largely upon arch/x86/crypto/
5 *
6 * Copyright (C) 2008, Intel Corp.
7 * Author: Huang Ying <ying.huang@intel.com
8 *
9 * Added RFC4106 AES-GCM support for 128-bit k
10 * interface for 64-bit kernels.
11 * Authors: Adrian Hoban <adrian.hoban@inte
12 * Gabriele Paoloni <gabriele.paol
13 * Tadeusz Struk (tadeusz.struk@in
14 * Aidan O'Mahony (aidan.o.mahony@
15 * Copyright (c) 2010, Intel Corporation.
16 */
17
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fm
19
20 #include <linux/crypto.h>
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/mm.h>
24 #include <linux/types.h>
25 #include <crypto/algapi.h>
26 #include <crypto/aes.h>
27 #include <crypto/internal/skcipher.h>
28
29 #include <asm/fpumacro.h>
30 #include <asm/pstate.h>
31 #include <asm/elf.h>
32
33 #include "opcodes.h"
34
35 struct aes_ops {
36 void (*encrypt)(const u64 *key, const
37 void (*decrypt)(const u64 *key, const
38 void (*load_encrypt_keys)(const u64 *k
39 void (*load_decrypt_keys)(const u64 *k
40 void (*ecb_encrypt)(const u64 *key, co
41 unsigned int len);
42 void (*ecb_decrypt)(const u64 *key, co
43 unsigned int len);
44 void (*cbc_encrypt)(const u64 *key, co
45 unsigned int len,
46 void (*cbc_decrypt)(const u64 *key, co
47 unsigned int len,
48 void (*ctr_crypt)(const u64 *key, cons
49 unsigned int len, u6
50 };
51
52 struct crypto_sparc64_aes_ctx {
53 struct aes_ops *ops;
54 u64 key[AES_MAX_KEYLENGTH / sizeof(u64
55 u32 key_length;
56 u32 expanded_key_length;
57 };
58
59 extern void aes_sparc64_encrypt_128(const u64
60 u32 *outpu
61 extern void aes_sparc64_encrypt_192(const u64
62 u32 *outpu
63 extern void aes_sparc64_encrypt_256(const u64
64 u32 *outpu
65
66 extern void aes_sparc64_decrypt_128(const u64
67 u32 *outpu
68 extern void aes_sparc64_decrypt_192(const u64
69 u32 *outpu
70 extern void aes_sparc64_decrypt_256(const u64
71 u32 *outpu
72
73 extern void aes_sparc64_load_encrypt_keys_128(
74 extern void aes_sparc64_load_encrypt_keys_192(
75 extern void aes_sparc64_load_encrypt_keys_256(
76
77 extern void aes_sparc64_load_decrypt_keys_128(
78 extern void aes_sparc64_load_decrypt_keys_192(
79 extern void aes_sparc64_load_decrypt_keys_256(
80
81 extern void aes_sparc64_ecb_encrypt_128(const
82 u64 *o
83 extern void aes_sparc64_ecb_encrypt_192(const
84 u64 *o
85 extern void aes_sparc64_ecb_encrypt_256(const
86 u64 *o
87
88 extern void aes_sparc64_ecb_decrypt_128(const
89 u64 *o
90 extern void aes_sparc64_ecb_decrypt_192(const
91 u64 *o
92 extern void aes_sparc64_ecb_decrypt_256(const
93 u64 *o
94
95 extern void aes_sparc64_cbc_encrypt_128(const
96 u64 *o
97 u64 *i
98
99 extern void aes_sparc64_cbc_encrypt_192(const
100 u64 *o
101 u64 *i
102
103 extern void aes_sparc64_cbc_encrypt_256(const
104 u64 *o
105 u64 *i
106
107 extern void aes_sparc64_cbc_decrypt_128(const
108 u64 *o
109 u64 *i
110
111 extern void aes_sparc64_cbc_decrypt_192(const
112 u64 *o
113 u64 *i
114
115 extern void aes_sparc64_cbc_decrypt_256(const
116 u64 *o
117 u64 *i
118
119 extern void aes_sparc64_ctr_crypt_128(const u6
120 u64 *out
121 u64 *iv)
122 extern void aes_sparc64_ctr_crypt_192(const u6
123 u64 *out
124 u64 *iv)
125 extern void aes_sparc64_ctr_crypt_256(const u6
126 u64 *out
127 u64 *iv)
128
129 static struct aes_ops aes128_ops = {
130 .encrypt = aes_sparc64_
131 .decrypt = aes_sparc64_
132 .load_encrypt_keys = aes_sparc64_
133 .load_decrypt_keys = aes_sparc64_
134 .ecb_encrypt = aes_sparc64_
135 .ecb_decrypt = aes_sparc64_
136 .cbc_encrypt = aes_sparc64_
137 .cbc_decrypt = aes_sparc64_
138 .ctr_crypt = aes_sparc64_
139 };
140
141 static struct aes_ops aes192_ops = {
142 .encrypt = aes_sparc64_
143 .decrypt = aes_sparc64_
144 .load_encrypt_keys = aes_sparc64_
145 .load_decrypt_keys = aes_sparc64_
146 .ecb_encrypt = aes_sparc64_
147 .ecb_decrypt = aes_sparc64_
148 .cbc_encrypt = aes_sparc64_
149 .cbc_decrypt = aes_sparc64_
150 .ctr_crypt = aes_sparc64_
151 };
152
153 static struct aes_ops aes256_ops = {
154 .encrypt = aes_sparc64_
155 .decrypt = aes_sparc64_
156 .load_encrypt_keys = aes_sparc64_
157 .load_decrypt_keys = aes_sparc64_
158 .ecb_encrypt = aes_sparc64_
159 .ecb_decrypt = aes_sparc64_
160 .cbc_encrypt = aes_sparc64_
161 .cbc_decrypt = aes_sparc64_
162 .ctr_crypt = aes_sparc64_
163 };
164
165 extern void aes_sparc64_key_expand(const u32 *
166 unsigned in
167
168 static int aes_set_key(struct crypto_tfm *tfm,
169 unsigned int key_len)
170 {
171 struct crypto_sparc64_aes_ctx *ctx = c
172
173 switch (key_len) {
174 case AES_KEYSIZE_128:
175 ctx->expanded_key_length = 0xb
176 ctx->ops = &aes128_ops;
177 break;
178
179 case AES_KEYSIZE_192:
180 ctx->expanded_key_length = 0xd
181 ctx->ops = &aes192_ops;
182 break;
183
184 case AES_KEYSIZE_256:
185 ctx->expanded_key_length = 0xf
186 ctx->ops = &aes256_ops;
187 break;
188
189 default:
190 return -EINVAL;
191 }
192
193 aes_sparc64_key_expand((const u32 *)in
194 ctx->key_length = key_len;
195
196 return 0;
197 }
198
199 static int aes_set_key_skcipher(struct crypto_
200 unsigned int k
201 {
202 return aes_set_key(crypto_skcipher_tfm
203 }
204
205 static void crypto_aes_encrypt(struct crypto_t
206 {
207 struct crypto_sparc64_aes_ctx *ctx = c
208
209 ctx->ops->encrypt(&ctx->key[0], (const
210 }
211
212 static void crypto_aes_decrypt(struct crypto_t
213 {
214 struct crypto_sparc64_aes_ctx *ctx = c
215
216 ctx->ops->decrypt(&ctx->key[0], (const
217 }
218
219 static int ecb_encrypt(struct skcipher_request
220 {
221 struct crypto_skcipher *tfm = crypto_s
222 const struct crypto_sparc64_aes_ctx *c
223 struct skcipher_walk walk;
224 unsigned int nbytes;
225 int err;
226
227 err = skcipher_walk_virt(&walk, req, t
228 if (err)
229 return err;
230
231 ctx->ops->load_encrypt_keys(&ctx->key[
232 while ((nbytes = walk.nbytes) != 0) {
233 ctx->ops->ecb_encrypt(&ctx->ke
234 walk.dst
235 round_do
236 err = skcipher_walk_done(&walk
237 }
238 fprs_write(0);
239 return err;
240 }
241
242 static int ecb_decrypt(struct skcipher_request
243 {
244 struct crypto_skcipher *tfm = crypto_s
245 const struct crypto_sparc64_aes_ctx *c
246 const u64 *key_end;
247 struct skcipher_walk walk;
248 unsigned int nbytes;
249 int err;
250
251 err = skcipher_walk_virt(&walk, req, t
252 if (err)
253 return err;
254
255 ctx->ops->load_decrypt_keys(&ctx->key[
256 key_end = &ctx->key[ctx->expanded_key_
257 while ((nbytes = walk.nbytes) != 0) {
258 ctx->ops->ecb_decrypt(key_end,
259 walk.dst
260 round_do
261 err = skcipher_walk_done(&walk
262 }
263 fprs_write(0);
264
265 return err;
266 }
267
268 static int cbc_encrypt(struct skcipher_request
269 {
270 struct crypto_skcipher *tfm = crypto_s
271 const struct crypto_sparc64_aes_ctx *c
272 struct skcipher_walk walk;
273 unsigned int nbytes;
274 int err;
275
276 err = skcipher_walk_virt(&walk, req, t
277 if (err)
278 return err;
279
280 ctx->ops->load_encrypt_keys(&ctx->key[
281 while ((nbytes = walk.nbytes) != 0) {
282 ctx->ops->cbc_encrypt(&ctx->ke
283 walk.dst
284 round_do
285 walk.iv)
286 err = skcipher_walk_done(&walk
287 }
288 fprs_write(0);
289 return err;
290 }
291
292 static int cbc_decrypt(struct skcipher_request
293 {
294 struct crypto_skcipher *tfm = crypto_s
295 const struct crypto_sparc64_aes_ctx *c
296 const u64 *key_end;
297 struct skcipher_walk walk;
298 unsigned int nbytes;
299 int err;
300
301 err = skcipher_walk_virt(&walk, req, t
302 if (err)
303 return err;
304
305 ctx->ops->load_decrypt_keys(&ctx->key[
306 key_end = &ctx->key[ctx->expanded_key_
307 while ((nbytes = walk.nbytes) != 0) {
308 ctx->ops->cbc_decrypt(key_end,
309 walk.dst
310 round_do
311 walk.iv)
312 err = skcipher_walk_done(&walk
313 }
314 fprs_write(0);
315
316 return err;
317 }
318
319 static void ctr_crypt_final(const struct crypt
320 struct skcipher_wa
321 {
322 u8 *ctrblk = walk->iv;
323 u64 keystream[AES_BLOCK_SIZE / sizeof(
324 u8 *src = walk->src.virt.addr;
325 u8 *dst = walk->dst.virt.addr;
326 unsigned int nbytes = walk->nbytes;
327
328 ctx->ops->ecb_encrypt(&ctx->key[0], (c
329 keystream, AES_B
330 crypto_xor_cpy(dst, (u8 *) keystream,
331 crypto_inc(ctrblk, AES_BLOCK_SIZE);
332 }
333
334 static int ctr_crypt(struct skcipher_request *
335 {
336 struct crypto_skcipher *tfm = crypto_s
337 const struct crypto_sparc64_aes_ctx *c
338 struct skcipher_walk walk;
339 unsigned int nbytes;
340 int err;
341
342 err = skcipher_walk_virt(&walk, req, t
343 if (err)
344 return err;
345
346 ctx->ops->load_encrypt_keys(&ctx->key[
347 while ((nbytes = walk.nbytes) >= AES_B
348 ctx->ops->ctr_crypt(&ctx->key[
349 walk.dst.v
350 round_down
351 walk.iv);
352 err = skcipher_walk_done(&walk
353 }
354 if (walk.nbytes) {
355 ctr_crypt_final(ctx, &walk);
356 err = skcipher_walk_done(&walk
357 }
358 fprs_write(0);
359 return err;
360 }
361
362 static struct crypto_alg cipher_alg = {
363 .cra_name = "aes",
364 .cra_driver_name = "aes-sparc64
365 .cra_priority = SPARC_CR_OPC
366 .cra_flags = CRYPTO_ALG_T
367 .cra_blocksize = AES_BLOCK_SI
368 .cra_ctxsize = sizeof(struc
369 .cra_alignmask = 3,
370 .cra_module = THIS_MODULE,
371 .cra_u = {
372 .cipher = {
373 .cia_min_keysize
374 .cia_max_keysize
375 .cia_setkey
376 .cia_encrypt
377 .cia_decrypt
378 }
379 }
380 };
381
382 static struct skcipher_alg skcipher_algs[] = {
383 {
384 .base.cra_name = "ecb
385 .base.cra_driver_name = "ecb
386 .base.cra_priority = SPAR
387 .base.cra_blocksize = AES_
388 .base.cra_ctxsize = size
389 .base.cra_alignmask = 7,
390 .base.cra_module = THIS
391 .min_keysize = AES_
392 .max_keysize = AES_
393 .setkey = aes_
394 .encrypt = ecb_
395 .decrypt = ecb_
396 }, {
397 .base.cra_name = "cbc
398 .base.cra_driver_name = "cbc
399 .base.cra_priority = SPAR
400 .base.cra_blocksize = AES_
401 .base.cra_ctxsize = size
402 .base.cra_alignmask = 7,
403 .base.cra_module = THIS
404 .min_keysize = AES_
405 .max_keysize = AES_
406 .ivsize = AES_
407 .setkey = aes_
408 .encrypt = cbc_
409 .decrypt = cbc_
410 }, {
411 .base.cra_name = "ctr
412 .base.cra_driver_name = "ctr
413 .base.cra_priority = SPAR
414 .base.cra_blocksize = 1,
415 .base.cra_ctxsize = size
416 .base.cra_alignmask = 7,
417 .base.cra_module = THIS
418 .min_keysize = AES_
419 .max_keysize = AES_
420 .ivsize = AES_
421 .setkey = aes_
422 .encrypt = ctr_
423 .decrypt = ctr_
424 .chunksize = AES_
425 }
426 };
427
428 static bool __init sparc64_has_aes_opcode(void
429 {
430 unsigned long cfr;
431
432 if (!(sparc64_elf_hwcap & HWCAP_SPARC_
433 return false;
434
435 __asm__ __volatile__("rd %%asr26, %0"
436 if (!(cfr & CFR_AES))
437 return false;
438
439 return true;
440 }
441
442 static int __init aes_sparc64_mod_init(void)
443 {
444 int err;
445
446 if (!sparc64_has_aes_opcode()) {
447 pr_info("sparc64 aes opcodes n
448 return -ENODEV;
449 }
450 pr_info("Using sparc64 aes opcodes opt
451 err = crypto_register_alg(&cipher_alg)
452 if (err)
453 return err;
454 err = crypto_register_skciphers(skciph
455 ARRAY_
456 if (err)
457 crypto_unregister_alg(&cipher_
458 return err;
459 }
460
461 static void __exit aes_sparc64_mod_fini(void)
462 {
463 crypto_unregister_alg(&cipher_alg);
464 crypto_unregister_skciphers(skcipher_a
465 }
466
467 module_init(aes_sparc64_mod_init);
468 module_exit(aes_sparc64_mod_fini);
469
470 MODULE_LICENSE("GPL");
471 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algo
472
473 MODULE_ALIAS_CRYPTO("aes");
474
475 #include "crop_devid.c"
476
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