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6298e948 LC |
1 | /* |
2 | * sun4i-ss-cipher.c - hardware cryptographic accelerator for Allwinner A20 SoC | |
3 | * | |
4 | * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com> | |
5 | * | |
6 | * This file add support for AES cipher with 128,192,256 bits | |
7 | * keysize in CBC and ECB mode. | |
8 | * Add support also for DES and 3DES in CBC and ECB mode. | |
9 | * | |
10 | * You could find the datasheet in Documentation/arm/sunxi/README | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | */ | |
17 | #include "sun4i-ss.h" | |
18 | ||
19 | static int sun4i_ss_opti_poll(struct ablkcipher_request *areq) | |
20 | { | |
21 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
22 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
23 | struct sun4i_ss_ctx *ss = op->ss; | |
24 | unsigned int ivsize = crypto_ablkcipher_ivsize(tfm); | |
25 | struct sun4i_cipher_req_ctx *ctx = ablkcipher_request_ctx(areq); | |
26 | u32 mode = ctx->mode; | |
27 | /* when activating SS, the default FIFO space is SS_RX_DEFAULT(32) */ | |
28 | u32 rx_cnt = SS_RX_DEFAULT; | |
29 | u32 tx_cnt = 0; | |
30 | u32 spaces; | |
31 | u32 v; | |
ea1a6741 CL |
32 | int err = 0; |
33 | unsigned int i; | |
6298e948 LC |
34 | unsigned int ileft = areq->nbytes; |
35 | unsigned int oleft = areq->nbytes; | |
36 | unsigned int todo; | |
37 | struct sg_mapping_iter mi, mo; | |
38 | unsigned int oi, oo; /* offset for in and out */ | |
bdb6cf9f | 39 | unsigned long flags; |
6298e948 LC |
40 | |
41 | if (areq->nbytes == 0) | |
42 | return 0; | |
43 | ||
44 | if (!areq->info) { | |
45 | dev_err_ratelimited(ss->dev, "ERROR: Empty IV\n"); | |
46 | return -EINVAL; | |
47 | } | |
48 | ||
49 | if (!areq->src || !areq->dst) { | |
50 | dev_err_ratelimited(ss->dev, "ERROR: Some SGs are NULL\n"); | |
51 | return -EINVAL; | |
52 | } | |
53 | ||
bdb6cf9f | 54 | spin_lock_irqsave(&ss->slock, flags); |
6298e948 LC |
55 | |
56 | for (i = 0; i < op->keylen; i += 4) | |
57 | writel(*(op->key + i / 4), ss->base + SS_KEY0 + i); | |
58 | ||
59 | if (areq->info) { | |
60 | for (i = 0; i < 4 && i < ivsize / 4; i++) { | |
61 | v = *(u32 *)(areq->info + i * 4); | |
62 | writel(v, ss->base + SS_IV0 + i * 4); | |
63 | } | |
64 | } | |
65 | writel(mode, ss->base + SS_CTL); | |
66 | ||
67 | sg_miter_start(&mi, areq->src, sg_nents(areq->src), | |
68 | SG_MITER_FROM_SG | SG_MITER_ATOMIC); | |
69 | sg_miter_start(&mo, areq->dst, sg_nents(areq->dst), | |
70 | SG_MITER_TO_SG | SG_MITER_ATOMIC); | |
71 | sg_miter_next(&mi); | |
72 | sg_miter_next(&mo); | |
73 | if (!mi.addr || !mo.addr) { | |
74 | dev_err_ratelimited(ss->dev, "ERROR: sg_miter return null\n"); | |
75 | err = -EINVAL; | |
76 | goto release_ss; | |
77 | } | |
78 | ||
79 | ileft = areq->nbytes / 4; | |
80 | oleft = areq->nbytes / 4; | |
81 | oi = 0; | |
82 | oo = 0; | |
83 | do { | |
84 | todo = min3(rx_cnt, ileft, (mi.length - oi) / 4); | |
85 | if (todo > 0) { | |
86 | ileft -= todo; | |
87 | writesl(ss->base + SS_RXFIFO, mi.addr + oi, todo); | |
88 | oi += todo * 4; | |
89 | } | |
90 | if (oi == mi.length) { | |
91 | sg_miter_next(&mi); | |
92 | oi = 0; | |
93 | } | |
94 | ||
95 | spaces = readl(ss->base + SS_FCSR); | |
96 | rx_cnt = SS_RXFIFO_SPACES(spaces); | |
97 | tx_cnt = SS_TXFIFO_SPACES(spaces); | |
98 | ||
99 | todo = min3(tx_cnt, oleft, (mo.length - oo) / 4); | |
100 | if (todo > 0) { | |
101 | oleft -= todo; | |
102 | readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo); | |
103 | oo += todo * 4; | |
104 | } | |
105 | if (oo == mo.length) { | |
106 | sg_miter_next(&mo); | |
107 | oo = 0; | |
108 | } | |
9da75de0 | 109 | } while (oleft > 0); |
6298e948 LC |
110 | |
111 | if (areq->info) { | |
112 | for (i = 0; i < 4 && i < ivsize / 4; i++) { | |
113 | v = readl(ss->base + SS_IV0 + i * 4); | |
114 | *(u32 *)(areq->info + i * 4) = v; | |
115 | } | |
116 | } | |
117 | ||
118 | release_ss: | |
119 | sg_miter_stop(&mi); | |
120 | sg_miter_stop(&mo); | |
121 | writel(0, ss->base + SS_CTL); | |
bdb6cf9f | 122 | spin_unlock_irqrestore(&ss->slock, flags); |
6298e948 LC |
123 | return err; |
124 | } | |
125 | ||
126 | /* Generic function that support SG with size not multiple of 4 */ | |
127 | static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq) | |
128 | { | |
129 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
130 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
131 | struct sun4i_ss_ctx *ss = op->ss; | |
132 | int no_chunk = 1; | |
133 | struct scatterlist *in_sg = areq->src; | |
134 | struct scatterlist *out_sg = areq->dst; | |
135 | unsigned int ivsize = crypto_ablkcipher_ivsize(tfm); | |
136 | struct sun4i_cipher_req_ctx *ctx = ablkcipher_request_ctx(areq); | |
137 | u32 mode = ctx->mode; | |
138 | /* when activating SS, the default FIFO space is SS_RX_DEFAULT(32) */ | |
139 | u32 rx_cnt = SS_RX_DEFAULT; | |
140 | u32 tx_cnt = 0; | |
141 | u32 v; | |
142 | u32 spaces; | |
ea1a6741 CL |
143 | int err = 0; |
144 | unsigned int i; | |
6298e948 LC |
145 | unsigned int ileft = areq->nbytes; |
146 | unsigned int oleft = areq->nbytes; | |
147 | unsigned int todo; | |
148 | struct sg_mapping_iter mi, mo; | |
149 | unsigned int oi, oo; /* offset for in and out */ | |
150 | char buf[4 * SS_RX_MAX];/* buffer for linearize SG src */ | |
151 | char bufo[4 * SS_TX_MAX]; /* buffer for linearize SG dst */ | |
152 | unsigned int ob = 0; /* offset in buf */ | |
153 | unsigned int obo = 0; /* offset in bufo*/ | |
154 | unsigned int obl = 0; /* length of data in bufo */ | |
bdb6cf9f | 155 | unsigned long flags; |
6298e948 LC |
156 | |
157 | if (areq->nbytes == 0) | |
158 | return 0; | |
159 | ||
160 | if (!areq->info) { | |
161 | dev_err_ratelimited(ss->dev, "ERROR: Empty IV\n"); | |
162 | return -EINVAL; | |
163 | } | |
164 | ||
165 | if (!areq->src || !areq->dst) { | |
166 | dev_err_ratelimited(ss->dev, "ERROR: Some SGs are NULL\n"); | |
167 | return -EINVAL; | |
168 | } | |
169 | ||
170 | /* | |
171 | * if we have only SGs with size multiple of 4, | |
172 | * we can use the SS optimized function | |
173 | */ | |
174 | while (in_sg && no_chunk == 1) { | |
175 | if ((in_sg->length % 4) != 0) | |
176 | no_chunk = 0; | |
177 | in_sg = sg_next(in_sg); | |
178 | } | |
179 | while (out_sg && no_chunk == 1) { | |
180 | if ((out_sg->length % 4) != 0) | |
181 | no_chunk = 0; | |
182 | out_sg = sg_next(out_sg); | |
183 | } | |
184 | ||
185 | if (no_chunk == 1) | |
186 | return sun4i_ss_opti_poll(areq); | |
187 | ||
bdb6cf9f | 188 | spin_lock_irqsave(&ss->slock, flags); |
6298e948 LC |
189 | |
190 | for (i = 0; i < op->keylen; i += 4) | |
191 | writel(*(op->key + i / 4), ss->base + SS_KEY0 + i); | |
192 | ||
193 | if (areq->info) { | |
194 | for (i = 0; i < 4 && i < ivsize / 4; i++) { | |
195 | v = *(u32 *)(areq->info + i * 4); | |
196 | writel(v, ss->base + SS_IV0 + i * 4); | |
197 | } | |
198 | } | |
199 | writel(mode, ss->base + SS_CTL); | |
200 | ||
201 | sg_miter_start(&mi, areq->src, sg_nents(areq->src), | |
202 | SG_MITER_FROM_SG | SG_MITER_ATOMIC); | |
203 | sg_miter_start(&mo, areq->dst, sg_nents(areq->dst), | |
204 | SG_MITER_TO_SG | SG_MITER_ATOMIC); | |
205 | sg_miter_next(&mi); | |
206 | sg_miter_next(&mo); | |
207 | if (!mi.addr || !mo.addr) { | |
208 | dev_err_ratelimited(ss->dev, "ERROR: sg_miter return null\n"); | |
209 | err = -EINVAL; | |
210 | goto release_ss; | |
211 | } | |
212 | ileft = areq->nbytes; | |
213 | oleft = areq->nbytes; | |
214 | oi = 0; | |
215 | oo = 0; | |
216 | ||
217 | while (oleft > 0) { | |
218 | if (ileft > 0) { | |
219 | /* | |
220 | * todo is the number of consecutive 4byte word that we | |
221 | * can read from current SG | |
222 | */ | |
223 | todo = min3(rx_cnt, ileft / 4, (mi.length - oi) / 4); | |
224 | if (todo > 0 && ob == 0) { | |
225 | writesl(ss->base + SS_RXFIFO, mi.addr + oi, | |
226 | todo); | |
227 | ileft -= todo * 4; | |
228 | oi += todo * 4; | |
229 | } else { | |
230 | /* | |
231 | * not enough consecutive bytes, so we need to | |
232 | * linearize in buf. todo is in bytes | |
233 | * After that copy, if we have a multiple of 4 | |
234 | * we need to be able to write all buf in one | |
235 | * pass, so it is why we min() with rx_cnt | |
236 | */ | |
237 | todo = min3(rx_cnt * 4 - ob, ileft, | |
238 | mi.length - oi); | |
239 | memcpy(buf + ob, mi.addr + oi, todo); | |
240 | ileft -= todo; | |
241 | oi += todo; | |
242 | ob += todo; | |
243 | if (ob % 4 == 0) { | |
244 | writesl(ss->base + SS_RXFIFO, buf, | |
245 | ob / 4); | |
246 | ob = 0; | |
247 | } | |
248 | } | |
249 | if (oi == mi.length) { | |
250 | sg_miter_next(&mi); | |
251 | oi = 0; | |
252 | } | |
253 | } | |
254 | ||
255 | spaces = readl(ss->base + SS_FCSR); | |
256 | rx_cnt = SS_RXFIFO_SPACES(spaces); | |
257 | tx_cnt = SS_TXFIFO_SPACES(spaces); | |
bfb28920 | 258 | dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n", |
6298e948 LC |
259 | mode, |
260 | oi, mi.length, ileft, areq->nbytes, rx_cnt, | |
bfb28920 | 261 | oo, mo.length, oleft, areq->nbytes, tx_cnt, ob); |
6298e948 LC |
262 | |
263 | if (tx_cnt == 0) | |
264 | continue; | |
265 | /* todo in 4bytes word */ | |
266 | todo = min3(tx_cnt, oleft / 4, (mo.length - oo) / 4); | |
267 | if (todo > 0) { | |
268 | readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo); | |
269 | oleft -= todo * 4; | |
270 | oo += todo * 4; | |
271 | if (oo == mo.length) { | |
272 | sg_miter_next(&mo); | |
273 | oo = 0; | |
274 | } | |
275 | } else { | |
276 | /* | |
277 | * read obl bytes in bufo, we read at maximum for | |
278 | * emptying the device | |
279 | */ | |
280 | readsl(ss->base + SS_TXFIFO, bufo, tx_cnt); | |
281 | obl = tx_cnt * 4; | |
282 | obo = 0; | |
283 | do { | |
284 | /* | |
285 | * how many bytes we can copy ? | |
286 | * no more than remaining SG size | |
287 | * no more than remaining buffer | |
288 | * no need to test against oleft | |
289 | */ | |
290 | todo = min(mo.length - oo, obl - obo); | |
291 | memcpy(mo.addr + oo, bufo + obo, todo); | |
292 | oleft -= todo; | |
293 | obo += todo; | |
294 | oo += todo; | |
295 | if (oo == mo.length) { | |
296 | sg_miter_next(&mo); | |
297 | oo = 0; | |
298 | } | |
299 | } while (obo < obl); | |
300 | /* bufo must be fully used here */ | |
301 | } | |
302 | } | |
303 | if (areq->info) { | |
304 | for (i = 0; i < 4 && i < ivsize / 4; i++) { | |
305 | v = readl(ss->base + SS_IV0 + i * 4); | |
306 | *(u32 *)(areq->info + i * 4) = v; | |
307 | } | |
308 | } | |
309 | ||
310 | release_ss: | |
311 | sg_miter_stop(&mi); | |
312 | sg_miter_stop(&mo); | |
313 | writel(0, ss->base + SS_CTL); | |
bdb6cf9f | 314 | spin_unlock_irqrestore(&ss->slock, flags); |
6298e948 LC |
315 | |
316 | return err; | |
317 | } | |
318 | ||
319 | /* CBC AES */ | |
320 | int sun4i_ss_cbc_aes_encrypt(struct ablkcipher_request *areq) | |
321 | { | |
322 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
323 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
324 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
325 | ||
326 | rctx->mode = SS_OP_AES | SS_CBC | SS_ENABLED | SS_ENCRYPTION | | |
327 | op->keymode; | |
328 | return sun4i_ss_cipher_poll(areq); | |
329 | } | |
330 | ||
331 | int sun4i_ss_cbc_aes_decrypt(struct ablkcipher_request *areq) | |
332 | { | |
333 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
334 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
335 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
336 | ||
337 | rctx->mode = SS_OP_AES | SS_CBC | SS_ENABLED | SS_DECRYPTION | | |
338 | op->keymode; | |
339 | return sun4i_ss_cipher_poll(areq); | |
340 | } | |
341 | ||
342 | /* ECB AES */ | |
343 | int sun4i_ss_ecb_aes_encrypt(struct ablkcipher_request *areq) | |
344 | { | |
345 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
346 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
347 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
348 | ||
349 | rctx->mode = SS_OP_AES | SS_ECB | SS_ENABLED | SS_ENCRYPTION | | |
350 | op->keymode; | |
351 | return sun4i_ss_cipher_poll(areq); | |
352 | } | |
353 | ||
354 | int sun4i_ss_ecb_aes_decrypt(struct ablkcipher_request *areq) | |
355 | { | |
356 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
357 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
358 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
359 | ||
360 | rctx->mode = SS_OP_AES | SS_ECB | SS_ENABLED | SS_DECRYPTION | | |
361 | op->keymode; | |
362 | return sun4i_ss_cipher_poll(areq); | |
363 | } | |
364 | ||
365 | /* CBC DES */ | |
366 | int sun4i_ss_cbc_des_encrypt(struct ablkcipher_request *areq) | |
367 | { | |
368 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
369 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
370 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
371 | ||
372 | rctx->mode = SS_OP_DES | SS_CBC | SS_ENABLED | SS_ENCRYPTION | | |
373 | op->keymode; | |
374 | return sun4i_ss_cipher_poll(areq); | |
375 | } | |
376 | ||
377 | int sun4i_ss_cbc_des_decrypt(struct ablkcipher_request *areq) | |
378 | { | |
379 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
380 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
381 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
382 | ||
383 | rctx->mode = SS_OP_DES | SS_CBC | SS_ENABLED | SS_DECRYPTION | | |
384 | op->keymode; | |
385 | return sun4i_ss_cipher_poll(areq); | |
386 | } | |
387 | ||
388 | /* ECB DES */ | |
389 | int sun4i_ss_ecb_des_encrypt(struct ablkcipher_request *areq) | |
390 | { | |
391 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
392 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
393 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
394 | ||
395 | rctx->mode = SS_OP_DES | SS_ECB | SS_ENABLED | SS_ENCRYPTION | | |
396 | op->keymode; | |
397 | return sun4i_ss_cipher_poll(areq); | |
398 | } | |
399 | ||
400 | int sun4i_ss_ecb_des_decrypt(struct ablkcipher_request *areq) | |
401 | { | |
402 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
403 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
404 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
405 | ||
406 | rctx->mode = SS_OP_DES | SS_ECB | SS_ENABLED | SS_DECRYPTION | | |
407 | op->keymode; | |
408 | return sun4i_ss_cipher_poll(areq); | |
409 | } | |
410 | ||
411 | /* CBC 3DES */ | |
412 | int sun4i_ss_cbc_des3_encrypt(struct ablkcipher_request *areq) | |
413 | { | |
414 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
415 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
416 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
417 | ||
418 | rctx->mode = SS_OP_3DES | SS_CBC | SS_ENABLED | SS_ENCRYPTION | | |
419 | op->keymode; | |
420 | return sun4i_ss_cipher_poll(areq); | |
421 | } | |
422 | ||
423 | int sun4i_ss_cbc_des3_decrypt(struct ablkcipher_request *areq) | |
424 | { | |
425 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
426 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
427 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
428 | ||
429 | rctx->mode = SS_OP_3DES | SS_CBC | SS_ENABLED | SS_DECRYPTION | | |
430 | op->keymode; | |
431 | return sun4i_ss_cipher_poll(areq); | |
432 | } | |
433 | ||
434 | /* ECB 3DES */ | |
435 | int sun4i_ss_ecb_des3_encrypt(struct ablkcipher_request *areq) | |
436 | { | |
437 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
438 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
439 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
440 | ||
441 | rctx->mode = SS_OP_3DES | SS_ECB | SS_ENABLED | SS_ENCRYPTION | | |
442 | op->keymode; | |
443 | return sun4i_ss_cipher_poll(areq); | |
444 | } | |
445 | ||
446 | int sun4i_ss_ecb_des3_decrypt(struct ablkcipher_request *areq) | |
447 | { | |
448 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(areq); | |
449 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
450 | struct sun4i_cipher_req_ctx *rctx = ablkcipher_request_ctx(areq); | |
451 | ||
452 | rctx->mode = SS_OP_3DES | SS_ECB | SS_ENABLED | SS_DECRYPTION | | |
453 | op->keymode; | |
454 | return sun4i_ss_cipher_poll(areq); | |
455 | } | |
456 | ||
457 | int sun4i_ss_cipher_init(struct crypto_tfm *tfm) | |
458 | { | |
459 | struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); | |
460 | struct crypto_alg *alg = tfm->__crt_alg; | |
461 | struct sun4i_ss_alg_template *algt; | |
462 | ||
463 | memset(op, 0, sizeof(struct sun4i_tfm_ctx)); | |
464 | ||
465 | algt = container_of(alg, struct sun4i_ss_alg_template, alg.crypto); | |
466 | op->ss = algt->ss; | |
467 | ||
468 | tfm->crt_ablkcipher.reqsize = sizeof(struct sun4i_cipher_req_ctx); | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /* check and set the AES key, prepare the mode to be used */ | |
474 | int sun4i_ss_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
475 | unsigned int keylen) | |
476 | { | |
477 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
478 | struct sun4i_ss_ctx *ss = op->ss; | |
479 | ||
480 | switch (keylen) { | |
481 | case 128 / 8: | |
482 | op->keymode = SS_AES_128BITS; | |
483 | break; | |
484 | case 192 / 8: | |
485 | op->keymode = SS_AES_192BITS; | |
486 | break; | |
487 | case 256 / 8: | |
488 | op->keymode = SS_AES_256BITS; | |
489 | break; | |
490 | default: | |
491 | dev_err(ss->dev, "ERROR: Invalid keylen %u\n", keylen); | |
492 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
493 | return -EINVAL; | |
494 | } | |
495 | op->keylen = keylen; | |
496 | memcpy(op->key, key, keylen); | |
497 | return 0; | |
498 | } | |
499 | ||
500 | /* check and set the DES key, prepare the mode to be used */ | |
501 | int sun4i_ss_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
502 | unsigned int keylen) | |
503 | { | |
504 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
505 | struct sun4i_ss_ctx *ss = op->ss; | |
506 | u32 flags; | |
507 | u32 tmp[DES_EXPKEY_WORDS]; | |
508 | int ret; | |
509 | ||
510 | if (unlikely(keylen != DES_KEY_SIZE)) { | |
511 | dev_err(ss->dev, "Invalid keylen %u\n", keylen); | |
512 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
513 | return -EINVAL; | |
514 | } | |
515 | ||
516 | flags = crypto_ablkcipher_get_flags(tfm); | |
517 | ||
518 | ret = des_ekey(tmp, key); | |
519 | if (unlikely(ret == 0) && (flags & CRYPTO_TFM_REQ_WEAK_KEY)) { | |
520 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_WEAK_KEY); | |
521 | dev_dbg(ss->dev, "Weak key %u\n", keylen); | |
522 | return -EINVAL; | |
523 | } | |
524 | ||
525 | op->keylen = keylen; | |
526 | memcpy(op->key, key, keylen); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | /* check and set the 3DES key, prepare the mode to be used */ | |
531 | int sun4i_ss_des3_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
532 | unsigned int keylen) | |
533 | { | |
534 | struct sun4i_tfm_ctx *op = crypto_ablkcipher_ctx(tfm); | |
535 | struct sun4i_ss_ctx *ss = op->ss; | |
536 | ||
537 | if (unlikely(keylen != 3 * DES_KEY_SIZE)) { | |
538 | dev_err(ss->dev, "Invalid keylen %u\n", keylen); | |
539 | crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
540 | return -EINVAL; | |
541 | } | |
542 | op->keylen = keylen; | |
543 | memcpy(op->key, key, keylen); | |
544 | return 0; | |
545 | } |