This source file includes following definitions.
- des_setkey
- s390_des_encrypt
- s390_des_decrypt
- ecb_desall_crypt
- cbc_desall_crypt
- ecb_des_encrypt
- ecb_des_decrypt
- cbc_des_encrypt
- cbc_des_decrypt
- des3_setkey
- des3_encrypt
- des3_decrypt
- ecb_des3_encrypt
- ecb_des3_decrypt
- cbc_des3_encrypt
- cbc_des3_decrypt
- __ctrblk_init
- ctr_desall_crypt
- ctr_des_encrypt
- ctr_des_decrypt
- ctr_des3_encrypt
- ctr_des3_decrypt
- des_s390_register_alg
- des_s390_exit
- des_s390_init
1
2
3
4
5
6
7
8
9
10
11
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/cpufeature.h>
15 #include <linux/crypto.h>
16 #include <linux/fips.h>
17 #include <linux/mutex.h>
18 #include <crypto/algapi.h>
19 #include <crypto/internal/des.h>
20 #include <asm/cpacf.h>
21
22 #define DES3_KEY_SIZE (3 * DES_KEY_SIZE)
23
24 static u8 *ctrblk;
25 static DEFINE_MUTEX(ctrblk_lock);
26
27 static cpacf_mask_t km_functions, kmc_functions, kmctr_functions;
28
29 struct s390_des_ctx {
30 u8 iv[DES_BLOCK_SIZE];
31 u8 key[DES3_KEY_SIZE];
32 };
33
34 static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
35 unsigned int key_len)
36 {
37 struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
38 int err;
39
40 err = crypto_des_verify_key(tfm, key);
41 if (err)
42 return err;
43
44 memcpy(ctx->key, key, key_len);
45 return 0;
46 }
47
48 static void s390_des_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
49 {
50 struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
51
52 cpacf_km(CPACF_KM_DEA, ctx->key, out, in, DES_BLOCK_SIZE);
53 }
54
55 static void s390_des_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
56 {
57 struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
58
59 cpacf_km(CPACF_KM_DEA | CPACF_DECRYPT,
60 ctx->key, out, in, DES_BLOCK_SIZE);
61 }
62
63 static struct crypto_alg des_alg = {
64 .cra_name = "des",
65 .cra_driver_name = "des-s390",
66 .cra_priority = 300,
67 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
68 .cra_blocksize = DES_BLOCK_SIZE,
69 .cra_ctxsize = sizeof(struct s390_des_ctx),
70 .cra_module = THIS_MODULE,
71 .cra_u = {
72 .cipher = {
73 .cia_min_keysize = DES_KEY_SIZE,
74 .cia_max_keysize = DES_KEY_SIZE,
75 .cia_setkey = des_setkey,
76 .cia_encrypt = s390_des_encrypt,
77 .cia_decrypt = s390_des_decrypt,
78 }
79 }
80 };
81
82 static int ecb_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
83 struct blkcipher_walk *walk)
84 {
85 struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
86 unsigned int nbytes, n;
87 int ret;
88
89 ret = blkcipher_walk_virt(desc, walk);
90 while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
91
92 n = nbytes & ~(DES_BLOCK_SIZE - 1);
93 cpacf_km(fc, ctx->key, walk->dst.virt.addr,
94 walk->src.virt.addr, n);
95 ret = blkcipher_walk_done(desc, walk, nbytes - n);
96 }
97 return ret;
98 }
99
100 static int cbc_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
101 struct blkcipher_walk *walk)
102 {
103 struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
104 unsigned int nbytes, n;
105 int ret;
106 struct {
107 u8 iv[DES_BLOCK_SIZE];
108 u8 key[DES3_KEY_SIZE];
109 } param;
110
111 ret = blkcipher_walk_virt(desc, walk);
112 memcpy(param.iv, walk->iv, DES_BLOCK_SIZE);
113 memcpy(param.key, ctx->key, DES3_KEY_SIZE);
114 while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
115
116 n = nbytes & ~(DES_BLOCK_SIZE - 1);
117 cpacf_kmc(fc, ¶m, walk->dst.virt.addr,
118 walk->src.virt.addr, n);
119 ret = blkcipher_walk_done(desc, walk, nbytes - n);
120 }
121 memcpy(walk->iv, param.iv, DES_BLOCK_SIZE);
122 return ret;
123 }
124
125 static int ecb_des_encrypt(struct blkcipher_desc *desc,
126 struct scatterlist *dst, struct scatterlist *src,
127 unsigned int nbytes)
128 {
129 struct blkcipher_walk walk;
130
131 blkcipher_walk_init(&walk, dst, src, nbytes);
132 return ecb_desall_crypt(desc, CPACF_KM_DEA, &walk);
133 }
134
135 static int ecb_des_decrypt(struct blkcipher_desc *desc,
136 struct scatterlist *dst, struct scatterlist *src,
137 unsigned int nbytes)
138 {
139 struct blkcipher_walk walk;
140
141 blkcipher_walk_init(&walk, dst, src, nbytes);
142 return ecb_desall_crypt(desc, CPACF_KM_DEA | CPACF_DECRYPT, &walk);
143 }
144
145 static struct crypto_alg ecb_des_alg = {
146 .cra_name = "ecb(des)",
147 .cra_driver_name = "ecb-des-s390",
148 .cra_priority = 400,
149 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
150 .cra_blocksize = DES_BLOCK_SIZE,
151 .cra_ctxsize = sizeof(struct s390_des_ctx),
152 .cra_type = &crypto_blkcipher_type,
153 .cra_module = THIS_MODULE,
154 .cra_u = {
155 .blkcipher = {
156 .min_keysize = DES_KEY_SIZE,
157 .max_keysize = DES_KEY_SIZE,
158 .setkey = des_setkey,
159 .encrypt = ecb_des_encrypt,
160 .decrypt = ecb_des_decrypt,
161 }
162 }
163 };
164
165 static int cbc_des_encrypt(struct blkcipher_desc *desc,
166 struct scatterlist *dst, struct scatterlist *src,
167 unsigned int nbytes)
168 {
169 struct blkcipher_walk walk;
170
171 blkcipher_walk_init(&walk, dst, src, nbytes);
172 return cbc_desall_crypt(desc, CPACF_KMC_DEA, &walk);
173 }
174
175 static int cbc_des_decrypt(struct blkcipher_desc *desc,
176 struct scatterlist *dst, struct scatterlist *src,
177 unsigned int nbytes)
178 {
179 struct blkcipher_walk walk;
180
181 blkcipher_walk_init(&walk, dst, src, nbytes);
182 return cbc_desall_crypt(desc, CPACF_KMC_DEA | CPACF_DECRYPT, &walk);
183 }
184
185 static struct crypto_alg cbc_des_alg = {
186 .cra_name = "cbc(des)",
187 .cra_driver_name = "cbc-des-s390",
188 .cra_priority = 400,
189 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
190 .cra_blocksize = DES_BLOCK_SIZE,
191 .cra_ctxsize = sizeof(struct s390_des_ctx),
192 .cra_type = &crypto_blkcipher_type,
193 .cra_module = THIS_MODULE,
194 .cra_u = {
195 .blkcipher = {
196 .min_keysize = DES_KEY_SIZE,
197 .max_keysize = DES_KEY_SIZE,
198 .ivsize = DES_BLOCK_SIZE,
199 .setkey = des_setkey,
200 .encrypt = cbc_des_encrypt,
201 .decrypt = cbc_des_decrypt,
202 }
203 }
204 };
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221 static int des3_setkey(struct crypto_tfm *tfm, const u8 *key,
222 unsigned int key_len)
223 {
224 struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
225 int err;
226
227 err = crypto_des3_ede_verify_key(tfm, key);
228 if (err)
229 return err;
230
231 memcpy(ctx->key, key, key_len);
232 return 0;
233 }
234
235 static void des3_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
236 {
237 struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
238
239 cpacf_km(CPACF_KM_TDEA_192, ctx->key, dst, src, DES_BLOCK_SIZE);
240 }
241
242 static void des3_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
243 {
244 struct s390_des_ctx *ctx = crypto_tfm_ctx(tfm);
245
246 cpacf_km(CPACF_KM_TDEA_192 | CPACF_DECRYPT,
247 ctx->key, dst, src, DES_BLOCK_SIZE);
248 }
249
250 static struct crypto_alg des3_alg = {
251 .cra_name = "des3_ede",
252 .cra_driver_name = "des3_ede-s390",
253 .cra_priority = 300,
254 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
255 .cra_blocksize = DES_BLOCK_SIZE,
256 .cra_ctxsize = sizeof(struct s390_des_ctx),
257 .cra_module = THIS_MODULE,
258 .cra_u = {
259 .cipher = {
260 .cia_min_keysize = DES3_KEY_SIZE,
261 .cia_max_keysize = DES3_KEY_SIZE,
262 .cia_setkey = des3_setkey,
263 .cia_encrypt = des3_encrypt,
264 .cia_decrypt = des3_decrypt,
265 }
266 }
267 };
268
269 static int ecb_des3_encrypt(struct blkcipher_desc *desc,
270 struct scatterlist *dst, struct scatterlist *src,
271 unsigned int nbytes)
272 {
273 struct blkcipher_walk walk;
274
275 blkcipher_walk_init(&walk, dst, src, nbytes);
276 return ecb_desall_crypt(desc, CPACF_KM_TDEA_192, &walk);
277 }
278
279 static int ecb_des3_decrypt(struct blkcipher_desc *desc,
280 struct scatterlist *dst, struct scatterlist *src,
281 unsigned int nbytes)
282 {
283 struct blkcipher_walk walk;
284
285 blkcipher_walk_init(&walk, dst, src, nbytes);
286 return ecb_desall_crypt(desc, CPACF_KM_TDEA_192 | CPACF_DECRYPT,
287 &walk);
288 }
289
290 static struct crypto_alg ecb_des3_alg = {
291 .cra_name = "ecb(des3_ede)",
292 .cra_driver_name = "ecb-des3_ede-s390",
293 .cra_priority = 400,
294 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
295 .cra_blocksize = DES_BLOCK_SIZE,
296 .cra_ctxsize = sizeof(struct s390_des_ctx),
297 .cra_type = &crypto_blkcipher_type,
298 .cra_module = THIS_MODULE,
299 .cra_u = {
300 .blkcipher = {
301 .min_keysize = DES3_KEY_SIZE,
302 .max_keysize = DES3_KEY_SIZE,
303 .setkey = des3_setkey,
304 .encrypt = ecb_des3_encrypt,
305 .decrypt = ecb_des3_decrypt,
306 }
307 }
308 };
309
310 static int cbc_des3_encrypt(struct blkcipher_desc *desc,
311 struct scatterlist *dst, struct scatterlist *src,
312 unsigned int nbytes)
313 {
314 struct blkcipher_walk walk;
315
316 blkcipher_walk_init(&walk, dst, src, nbytes);
317 return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192, &walk);
318 }
319
320 static int cbc_des3_decrypt(struct blkcipher_desc *desc,
321 struct scatterlist *dst, struct scatterlist *src,
322 unsigned int nbytes)
323 {
324 struct blkcipher_walk walk;
325
326 blkcipher_walk_init(&walk, dst, src, nbytes);
327 return cbc_desall_crypt(desc, CPACF_KMC_TDEA_192 | CPACF_DECRYPT,
328 &walk);
329 }
330
331 static struct crypto_alg cbc_des3_alg = {
332 .cra_name = "cbc(des3_ede)",
333 .cra_driver_name = "cbc-des3_ede-s390",
334 .cra_priority = 400,
335 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
336 .cra_blocksize = DES_BLOCK_SIZE,
337 .cra_ctxsize = sizeof(struct s390_des_ctx),
338 .cra_type = &crypto_blkcipher_type,
339 .cra_module = THIS_MODULE,
340 .cra_u = {
341 .blkcipher = {
342 .min_keysize = DES3_KEY_SIZE,
343 .max_keysize = DES3_KEY_SIZE,
344 .ivsize = DES_BLOCK_SIZE,
345 .setkey = des3_setkey,
346 .encrypt = cbc_des3_encrypt,
347 .decrypt = cbc_des3_decrypt,
348 }
349 }
350 };
351
352 static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
353 {
354 unsigned int i, n;
355
356
357 n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(DES_BLOCK_SIZE - 1);
358 memcpy(ctrptr, iv, DES_BLOCK_SIZE);
359 for (i = (n / DES_BLOCK_SIZE) - 1; i > 0; i--) {
360 memcpy(ctrptr + DES_BLOCK_SIZE, ctrptr, DES_BLOCK_SIZE);
361 crypto_inc(ctrptr + DES_BLOCK_SIZE, DES_BLOCK_SIZE);
362 ctrptr += DES_BLOCK_SIZE;
363 }
364 return n;
365 }
366
367 static int ctr_desall_crypt(struct blkcipher_desc *desc, unsigned long fc,
368 struct blkcipher_walk *walk)
369 {
370 struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
371 u8 buf[DES_BLOCK_SIZE], *ctrptr;
372 unsigned int n, nbytes;
373 int ret, locked;
374
375 locked = mutex_trylock(&ctrblk_lock);
376
377 ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
378 while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
379 n = DES_BLOCK_SIZE;
380 if (nbytes >= 2*DES_BLOCK_SIZE && locked)
381 n = __ctrblk_init(ctrblk, walk->iv, nbytes);
382 ctrptr = (n > DES_BLOCK_SIZE) ? ctrblk : walk->iv;
383 cpacf_kmctr(fc, ctx->key, walk->dst.virt.addr,
384 walk->src.virt.addr, n, ctrptr);
385 if (ctrptr == ctrblk)
386 memcpy(walk->iv, ctrptr + n - DES_BLOCK_SIZE,
387 DES_BLOCK_SIZE);
388 crypto_inc(walk->iv, DES_BLOCK_SIZE);
389 ret = blkcipher_walk_done(desc, walk, nbytes - n);
390 }
391 if (locked)
392 mutex_unlock(&ctrblk_lock);
393
394 if (nbytes) {
395 cpacf_kmctr(fc, ctx->key, buf, walk->src.virt.addr,
396 DES_BLOCK_SIZE, walk->iv);
397 memcpy(walk->dst.virt.addr, buf, nbytes);
398 crypto_inc(walk->iv, DES_BLOCK_SIZE);
399 ret = blkcipher_walk_done(desc, walk, 0);
400 }
401 return ret;
402 }
403
404 static int ctr_des_encrypt(struct blkcipher_desc *desc,
405 struct scatterlist *dst, struct scatterlist *src,
406 unsigned int nbytes)
407 {
408 struct blkcipher_walk walk;
409
410 blkcipher_walk_init(&walk, dst, src, nbytes);
411 return ctr_desall_crypt(desc, CPACF_KMCTR_DEA, &walk);
412 }
413
414 static int ctr_des_decrypt(struct blkcipher_desc *desc,
415 struct scatterlist *dst, struct scatterlist *src,
416 unsigned int nbytes)
417 {
418 struct blkcipher_walk walk;
419
420 blkcipher_walk_init(&walk, dst, src, nbytes);
421 return ctr_desall_crypt(desc, CPACF_KMCTR_DEA | CPACF_DECRYPT, &walk);
422 }
423
424 static struct crypto_alg ctr_des_alg = {
425 .cra_name = "ctr(des)",
426 .cra_driver_name = "ctr-des-s390",
427 .cra_priority = 400,
428 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
429 .cra_blocksize = 1,
430 .cra_ctxsize = sizeof(struct s390_des_ctx),
431 .cra_type = &crypto_blkcipher_type,
432 .cra_module = THIS_MODULE,
433 .cra_u = {
434 .blkcipher = {
435 .min_keysize = DES_KEY_SIZE,
436 .max_keysize = DES_KEY_SIZE,
437 .ivsize = DES_BLOCK_SIZE,
438 .setkey = des_setkey,
439 .encrypt = ctr_des_encrypt,
440 .decrypt = ctr_des_decrypt,
441 }
442 }
443 };
444
445 static int ctr_des3_encrypt(struct blkcipher_desc *desc,
446 struct scatterlist *dst, struct scatterlist *src,
447 unsigned int nbytes)
448 {
449 struct blkcipher_walk walk;
450
451 blkcipher_walk_init(&walk, dst, src, nbytes);
452 return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192, &walk);
453 }
454
455 static int ctr_des3_decrypt(struct blkcipher_desc *desc,
456 struct scatterlist *dst, struct scatterlist *src,
457 unsigned int nbytes)
458 {
459 struct blkcipher_walk walk;
460
461 blkcipher_walk_init(&walk, dst, src, nbytes);
462 return ctr_desall_crypt(desc, CPACF_KMCTR_TDEA_192 | CPACF_DECRYPT,
463 &walk);
464 }
465
466 static struct crypto_alg ctr_des3_alg = {
467 .cra_name = "ctr(des3_ede)",
468 .cra_driver_name = "ctr-des3_ede-s390",
469 .cra_priority = 400,
470 .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
471 .cra_blocksize = 1,
472 .cra_ctxsize = sizeof(struct s390_des_ctx),
473 .cra_type = &crypto_blkcipher_type,
474 .cra_module = THIS_MODULE,
475 .cra_u = {
476 .blkcipher = {
477 .min_keysize = DES3_KEY_SIZE,
478 .max_keysize = DES3_KEY_SIZE,
479 .ivsize = DES_BLOCK_SIZE,
480 .setkey = des3_setkey,
481 .encrypt = ctr_des3_encrypt,
482 .decrypt = ctr_des3_decrypt,
483 }
484 }
485 };
486
487 static struct crypto_alg *des_s390_algs_ptr[8];
488 static int des_s390_algs_num;
489
490 static int des_s390_register_alg(struct crypto_alg *alg)
491 {
492 int ret;
493
494 ret = crypto_register_alg(alg);
495 if (!ret)
496 des_s390_algs_ptr[des_s390_algs_num++] = alg;
497 return ret;
498 }
499
500 static void des_s390_exit(void)
501 {
502 while (des_s390_algs_num--)
503 crypto_unregister_alg(des_s390_algs_ptr[des_s390_algs_num]);
504 if (ctrblk)
505 free_page((unsigned long) ctrblk);
506 }
507
508 static int __init des_s390_init(void)
509 {
510 int ret;
511
512
513 cpacf_query(CPACF_KM, &km_functions);
514 cpacf_query(CPACF_KMC, &kmc_functions);
515 cpacf_query(CPACF_KMCTR, &kmctr_functions);
516
517 if (cpacf_test_func(&km_functions, CPACF_KM_DEA)) {
518 ret = des_s390_register_alg(&des_alg);
519 if (ret)
520 goto out_err;
521 ret = des_s390_register_alg(&ecb_des_alg);
522 if (ret)
523 goto out_err;
524 }
525 if (cpacf_test_func(&kmc_functions, CPACF_KMC_DEA)) {
526 ret = des_s390_register_alg(&cbc_des_alg);
527 if (ret)
528 goto out_err;
529 }
530 if (cpacf_test_func(&km_functions, CPACF_KM_TDEA_192)) {
531 ret = des_s390_register_alg(&des3_alg);
532 if (ret)
533 goto out_err;
534 ret = des_s390_register_alg(&ecb_des3_alg);
535 if (ret)
536 goto out_err;
537 }
538 if (cpacf_test_func(&kmc_functions, CPACF_KMC_TDEA_192)) {
539 ret = des_s390_register_alg(&cbc_des3_alg);
540 if (ret)
541 goto out_err;
542 }
543
544 if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA) ||
545 cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) {
546 ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
547 if (!ctrblk) {
548 ret = -ENOMEM;
549 goto out_err;
550 }
551 }
552
553 if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_DEA)) {
554 ret = des_s390_register_alg(&ctr_des_alg);
555 if (ret)
556 goto out_err;
557 }
558 if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_TDEA_192)) {
559 ret = des_s390_register_alg(&ctr_des3_alg);
560 if (ret)
561 goto out_err;
562 }
563
564 return 0;
565 out_err:
566 des_s390_exit();
567 return ret;
568 }
569
570 module_cpu_feature_match(MSA, des_s390_init);
571 module_exit(des_s390_exit);
572
573 MODULE_ALIAS_CRYPTO("des");
574 MODULE_ALIAS_CRYPTO("des3_ede");
575
576 MODULE_LICENSE("GPL");
577 MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");