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81bef015 CH |
1 | /* |
2 | * Intel IXP4xx NPE-C crypto driver | |
3 | * | |
4 | * Copyright (C) 2008 Christian Hohnstaedt <chohnstaedt@innominate.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of version 2 of the GNU General Public License | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/platform_device.h> | |
13 | #include <linux/dma-mapping.h> | |
14 | #include <linux/dmapool.h> | |
15 | #include <linux/crypto.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/spinlock.h> | |
20 | ||
21 | #include <crypto/ctr.h> | |
22 | #include <crypto/des.h> | |
23 | #include <crypto/aes.h> | |
24 | #include <crypto/sha.h> | |
25 | #include <crypto/algapi.h> | |
26 | #include <crypto/aead.h> | |
27 | #include <crypto/authenc.h> | |
28 | #include <crypto/scatterwalk.h> | |
29 | ||
a09e64fb RK |
30 | #include <mach/npe.h> |
31 | #include <mach/qmgr.h> | |
81bef015 CH |
32 | |
33 | #define MAX_KEYLEN 32 | |
34 | ||
35 | /* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */ | |
36 | #define NPE_CTX_LEN 80 | |
37 | #define AES_BLOCK128 16 | |
38 | ||
39 | #define NPE_OP_HASH_VERIFY 0x01 | |
40 | #define NPE_OP_CCM_ENABLE 0x04 | |
41 | #define NPE_OP_CRYPT_ENABLE 0x08 | |
42 | #define NPE_OP_HASH_ENABLE 0x10 | |
43 | #define NPE_OP_NOT_IN_PLACE 0x20 | |
44 | #define NPE_OP_HMAC_DISABLE 0x40 | |
45 | #define NPE_OP_CRYPT_ENCRYPT 0x80 | |
46 | ||
47 | #define NPE_OP_CCM_GEN_MIC 0xcc | |
48 | #define NPE_OP_HASH_GEN_ICV 0x50 | |
49 | #define NPE_OP_ENC_GEN_KEY 0xc9 | |
50 | ||
51 | #define MOD_ECB 0x0000 | |
52 | #define MOD_CTR 0x1000 | |
53 | #define MOD_CBC_ENC 0x2000 | |
54 | #define MOD_CBC_DEC 0x3000 | |
55 | #define MOD_CCM_ENC 0x4000 | |
56 | #define MOD_CCM_DEC 0x5000 | |
57 | ||
58 | #define KEYLEN_128 4 | |
59 | #define KEYLEN_192 6 | |
60 | #define KEYLEN_256 8 | |
61 | ||
62 | #define CIPH_DECR 0x0000 | |
63 | #define CIPH_ENCR 0x0400 | |
64 | ||
65 | #define MOD_DES 0x0000 | |
66 | #define MOD_TDEA2 0x0100 | |
67 | #define MOD_3DES 0x0200 | |
68 | #define MOD_AES 0x0800 | |
69 | #define MOD_AES128 (0x0800 | KEYLEN_128) | |
70 | #define MOD_AES192 (0x0900 | KEYLEN_192) | |
71 | #define MOD_AES256 (0x0a00 | KEYLEN_256) | |
72 | ||
73 | #define MAX_IVLEN 16 | |
74 | #define NPE_ID 2 /* NPE C */ | |
75 | #define NPE_QLEN 16 | |
76 | /* Space for registering when the first | |
77 | * NPE_QLEN crypt_ctl are busy */ | |
78 | #define NPE_QLEN_TOTAL 64 | |
79 | ||
80 | #define SEND_QID 29 | |
81 | #define RECV_QID 30 | |
82 | ||
83 | #define CTL_FLAG_UNUSED 0x0000 | |
84 | #define CTL_FLAG_USED 0x1000 | |
85 | #define CTL_FLAG_PERFORM_ABLK 0x0001 | |
86 | #define CTL_FLAG_GEN_ICV 0x0002 | |
87 | #define CTL_FLAG_GEN_REVAES 0x0004 | |
88 | #define CTL_FLAG_PERFORM_AEAD 0x0008 | |
89 | #define CTL_FLAG_MASK 0x000f | |
90 | ||
91 | #define HMAC_IPAD_VALUE 0x36 | |
92 | #define HMAC_OPAD_VALUE 0x5C | |
93 | #define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE | |
94 | ||
95 | #define MD5_DIGEST_SIZE 16 | |
96 | ||
97 | struct buffer_desc { | |
98 | u32 phys_next; | |
99 | u16 buf_len; | |
100 | u16 pkt_len; | |
101 | u32 phys_addr; | |
102 | u32 __reserved[4]; | |
103 | struct buffer_desc *next; | |
0d44dc59 | 104 | enum dma_data_direction dir; |
81bef015 CH |
105 | }; |
106 | ||
107 | struct crypt_ctl { | |
108 | u8 mode; /* NPE_OP_* operation mode */ | |
109 | u8 init_len; | |
110 | u16 reserved; | |
111 | u8 iv[MAX_IVLEN]; /* IV for CBC mode or CTR IV for CTR mode */ | |
112 | u32 icv_rev_aes; /* icv or rev aes */ | |
113 | u32 src_buf; | |
114 | u32 dst_buf; | |
115 | u16 auth_offs; /* Authentication start offset */ | |
116 | u16 auth_len; /* Authentication data length */ | |
117 | u16 crypt_offs; /* Cryption start offset */ | |
118 | u16 crypt_len; /* Cryption data length */ | |
119 | u32 aadAddr; /* Additional Auth Data Addr for CCM mode */ | |
120 | u32 crypto_ctx; /* NPE Crypto Param structure address */ | |
121 | ||
122 | /* Used by Host: 4*4 bytes*/ | |
123 | unsigned ctl_flags; | |
124 | union { | |
125 | struct ablkcipher_request *ablk_req; | |
126 | struct aead_request *aead_req; | |
127 | struct crypto_tfm *tfm; | |
128 | } data; | |
129 | struct buffer_desc *regist_buf; | |
130 | u8 *regist_ptr; | |
131 | }; | |
132 | ||
133 | struct ablk_ctx { | |
134 | struct buffer_desc *src; | |
135 | struct buffer_desc *dst; | |
81bef015 CH |
136 | }; |
137 | ||
138 | struct aead_ctx { | |
139 | struct buffer_desc *buffer; | |
81bef015 CH |
140 | struct scatterlist ivlist; |
141 | /* used when the hmac is not on one sg entry */ | |
142 | u8 *hmac_virt; | |
143 | int encrypt; | |
144 | }; | |
145 | ||
146 | struct ix_hash_algo { | |
147 | u32 cfgword; | |
148 | unsigned char *icv; | |
149 | }; | |
150 | ||
151 | struct ix_sa_dir { | |
152 | unsigned char *npe_ctx; | |
153 | dma_addr_t npe_ctx_phys; | |
154 | int npe_ctx_idx; | |
155 | u8 npe_mode; | |
156 | }; | |
157 | ||
158 | struct ixp_ctx { | |
159 | struct ix_sa_dir encrypt; | |
160 | struct ix_sa_dir decrypt; | |
161 | int authkey_len; | |
162 | u8 authkey[MAX_KEYLEN]; | |
163 | int enckey_len; | |
164 | u8 enckey[MAX_KEYLEN]; | |
165 | u8 salt[MAX_IVLEN]; | |
166 | u8 nonce[CTR_RFC3686_NONCE_SIZE]; | |
167 | unsigned salted; | |
168 | atomic_t configuring; | |
169 | struct completion completion; | |
170 | }; | |
171 | ||
172 | struct ixp_alg { | |
173 | struct crypto_alg crypto; | |
174 | const struct ix_hash_algo *hash; | |
175 | u32 cfg_enc; | |
176 | u32 cfg_dec; | |
177 | ||
178 | int registered; | |
179 | }; | |
180 | ||
181 | static const struct ix_hash_algo hash_alg_md5 = { | |
182 | .cfgword = 0xAA010004, | |
183 | .icv = "\x01\x23\x45\x67\x89\xAB\xCD\xEF" | |
184 | "\xFE\xDC\xBA\x98\x76\x54\x32\x10", | |
185 | }; | |
186 | static const struct ix_hash_algo hash_alg_sha1 = { | |
187 | .cfgword = 0x00000005, | |
188 | .icv = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA" | |
189 | "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0", | |
190 | }; | |
191 | ||
192 | static struct npe *npe_c; | |
193 | static struct dma_pool *buffer_pool = NULL; | |
194 | static struct dma_pool *ctx_pool = NULL; | |
195 | ||
196 | static struct crypt_ctl *crypt_virt = NULL; | |
197 | static dma_addr_t crypt_phys; | |
198 | ||
199 | static int support_aes = 1; | |
200 | ||
201 | static void dev_release(struct device *dev) | |
202 | { | |
203 | return; | |
204 | } | |
205 | ||
206 | #define DRIVER_NAME "ixp4xx_crypto" | |
207 | static struct platform_device pseudo_dev = { | |
208 | .name = DRIVER_NAME, | |
209 | .id = 0, | |
210 | .num_resources = 0, | |
211 | .dev = { | |
284901a9 | 212 | .coherent_dma_mask = DMA_BIT_MASK(32), |
81bef015 CH |
213 | .release = dev_release, |
214 | } | |
215 | }; | |
216 | ||
217 | static struct device *dev = &pseudo_dev.dev; | |
218 | ||
219 | static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt) | |
220 | { | |
221 | return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl); | |
222 | } | |
223 | ||
224 | static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys) | |
225 | { | |
226 | return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl); | |
227 | } | |
228 | ||
229 | static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm) | |
230 | { | |
231 | return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_enc; | |
232 | } | |
233 | ||
234 | static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm) | |
235 | { | |
236 | return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_dec; | |
237 | } | |
238 | ||
239 | static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm) | |
240 | { | |
241 | return container_of(tfm->__crt_alg, struct ixp_alg, crypto)->hash; | |
242 | } | |
243 | ||
244 | static int setup_crypt_desc(void) | |
245 | { | |
246 | BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64); | |
247 | crypt_virt = dma_alloc_coherent(dev, | |
248 | NPE_QLEN * sizeof(struct crypt_ctl), | |
249 | &crypt_phys, GFP_KERNEL); | |
250 | if (!crypt_virt) | |
251 | return -ENOMEM; | |
252 | memset(crypt_virt, 0, NPE_QLEN * sizeof(struct crypt_ctl)); | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static spinlock_t desc_lock; | |
257 | static struct crypt_ctl *get_crypt_desc(void) | |
258 | { | |
259 | int i; | |
260 | static int idx = 0; | |
261 | unsigned long flags; | |
262 | ||
263 | spin_lock_irqsave(&desc_lock, flags); | |
264 | ||
265 | if (unlikely(!crypt_virt)) | |
266 | setup_crypt_desc(); | |
267 | if (unlikely(!crypt_virt)) { | |
268 | spin_unlock_irqrestore(&desc_lock, flags); | |
269 | return NULL; | |
270 | } | |
271 | i = idx; | |
272 | if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) { | |
273 | if (++idx >= NPE_QLEN) | |
274 | idx = 0; | |
275 | crypt_virt[i].ctl_flags = CTL_FLAG_USED; | |
276 | spin_unlock_irqrestore(&desc_lock, flags); | |
277 | return crypt_virt +i; | |
278 | } else { | |
279 | spin_unlock_irqrestore(&desc_lock, flags); | |
280 | return NULL; | |
281 | } | |
282 | } | |
283 | ||
284 | static spinlock_t emerg_lock; | |
285 | static struct crypt_ctl *get_crypt_desc_emerg(void) | |
286 | { | |
287 | int i; | |
288 | static int idx = NPE_QLEN; | |
289 | struct crypt_ctl *desc; | |
290 | unsigned long flags; | |
291 | ||
292 | desc = get_crypt_desc(); | |
293 | if (desc) | |
294 | return desc; | |
295 | if (unlikely(!crypt_virt)) | |
296 | return NULL; | |
297 | ||
298 | spin_lock_irqsave(&emerg_lock, flags); | |
299 | i = idx; | |
300 | if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) { | |
301 | if (++idx >= NPE_QLEN_TOTAL) | |
302 | idx = NPE_QLEN; | |
303 | crypt_virt[i].ctl_flags = CTL_FLAG_USED; | |
304 | spin_unlock_irqrestore(&emerg_lock, flags); | |
305 | return crypt_virt +i; | |
306 | } else { | |
307 | spin_unlock_irqrestore(&emerg_lock, flags); | |
308 | return NULL; | |
309 | } | |
310 | } | |
311 | ||
0d44dc59 | 312 | static void free_buf_chain(struct device *dev, struct buffer_desc *buf,u32 phys) |
81bef015 CH |
313 | { |
314 | while (buf) { | |
315 | struct buffer_desc *buf1; | |
316 | u32 phys1; | |
317 | ||
318 | buf1 = buf->next; | |
319 | phys1 = buf->phys_next; | |
0d44dc59 | 320 | dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir); |
81bef015 CH |
321 | dma_pool_free(buffer_pool, buf, phys); |
322 | buf = buf1; | |
323 | phys = phys1; | |
324 | } | |
325 | } | |
326 | ||
327 | static struct tasklet_struct crypto_done_tasklet; | |
328 | ||
329 | static void finish_scattered_hmac(struct crypt_ctl *crypt) | |
330 | { | |
331 | struct aead_request *req = crypt->data.aead_req; | |
332 | struct aead_ctx *req_ctx = aead_request_ctx(req); | |
333 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
334 | int authsize = crypto_aead_authsize(tfm); | |
335 | int decryptlen = req->cryptlen - authsize; | |
336 | ||
337 | if (req_ctx->encrypt) { | |
338 | scatterwalk_map_and_copy(req_ctx->hmac_virt, | |
339 | req->src, decryptlen, authsize, 1); | |
340 | } | |
341 | dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes); | |
342 | } | |
343 | ||
344 | static void one_packet(dma_addr_t phys) | |
345 | { | |
346 | struct crypt_ctl *crypt; | |
347 | struct ixp_ctx *ctx; | |
348 | int failed; | |
81bef015 CH |
349 | |
350 | failed = phys & 0x1 ? -EBADMSG : 0; | |
351 | phys &= ~0x3; | |
352 | crypt = crypt_phys2virt(phys); | |
353 | ||
354 | switch (crypt->ctl_flags & CTL_FLAG_MASK) { | |
355 | case CTL_FLAG_PERFORM_AEAD: { | |
356 | struct aead_request *req = crypt->data.aead_req; | |
357 | struct aead_ctx *req_ctx = aead_request_ctx(req); | |
81bef015 | 358 | |
0d44dc59 | 359 | free_buf_chain(dev, req_ctx->buffer, crypt->src_buf); |
81bef015 CH |
360 | if (req_ctx->hmac_virt) { |
361 | finish_scattered_hmac(crypt); | |
362 | } | |
363 | req->base.complete(&req->base, failed); | |
364 | break; | |
365 | } | |
366 | case CTL_FLAG_PERFORM_ABLK: { | |
367 | struct ablkcipher_request *req = crypt->data.ablk_req; | |
368 | struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req); | |
0d44dc59 | 369 | |
81bef015 | 370 | if (req_ctx->dst) { |
0d44dc59 | 371 | free_buf_chain(dev, req_ctx->dst, crypt->dst_buf); |
81bef015 | 372 | } |
0d44dc59 | 373 | free_buf_chain(dev, req_ctx->src, crypt->src_buf); |
81bef015 CH |
374 | req->base.complete(&req->base, failed); |
375 | break; | |
376 | } | |
377 | case CTL_FLAG_GEN_ICV: | |
378 | ctx = crypto_tfm_ctx(crypt->data.tfm); | |
379 | dma_pool_free(ctx_pool, crypt->regist_ptr, | |
380 | crypt->regist_buf->phys_addr); | |
381 | dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf); | |
382 | if (atomic_dec_and_test(&ctx->configuring)) | |
383 | complete(&ctx->completion); | |
384 | break; | |
385 | case CTL_FLAG_GEN_REVAES: | |
386 | ctx = crypto_tfm_ctx(crypt->data.tfm); | |
387 | *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR); | |
388 | if (atomic_dec_and_test(&ctx->configuring)) | |
389 | complete(&ctx->completion); | |
390 | break; | |
391 | default: | |
392 | BUG(); | |
393 | } | |
394 | crypt->ctl_flags = CTL_FLAG_UNUSED; | |
395 | } | |
396 | ||
397 | static void irqhandler(void *_unused) | |
398 | { | |
399 | tasklet_schedule(&crypto_done_tasklet); | |
400 | } | |
401 | ||
402 | static void crypto_done_action(unsigned long arg) | |
403 | { | |
404 | int i; | |
405 | ||
406 | for(i=0; i<4; i++) { | |
407 | dma_addr_t phys = qmgr_get_entry(RECV_QID); | |
408 | if (!phys) | |
409 | return; | |
410 | one_packet(phys); | |
411 | } | |
412 | tasklet_schedule(&crypto_done_tasklet); | |
413 | } | |
414 | ||
415 | static int init_ixp_crypto(void) | |
416 | { | |
417 | int ret = -ENODEV; | |
295c01f9 | 418 | u32 msg[2] = { 0, 0 }; |
81bef015 CH |
419 | |
420 | if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH | | |
421 | IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) { | |
422 | printk(KERN_ERR "ixp_crypto: No HW crypto available\n"); | |
423 | return ret; | |
424 | } | |
425 | npe_c = npe_request(NPE_ID); | |
426 | if (!npe_c) | |
427 | return ret; | |
428 | ||
429 | if (!npe_running(npe_c)) { | |
295c01f9 CH |
430 | ret = npe_load_firmware(npe_c, npe_name(npe_c), dev); |
431 | if (ret) { | |
432 | return ret; | |
433 | } | |
434 | if (npe_recv_message(npe_c, msg, "STATUS_MSG")) | |
435 | goto npe_error; | |
436 | } else { | |
437 | if (npe_send_message(npe_c, msg, "STATUS_MSG")) | |
438 | goto npe_error; | |
439 | ||
440 | if (npe_recv_message(npe_c, msg, "STATUS_MSG")) | |
441 | goto npe_error; | |
81bef015 CH |
442 | } |
443 | ||
295c01f9 CH |
444 | switch ((msg[1]>>16) & 0xff) { |
445 | case 3: | |
446 | printk(KERN_WARNING "Firmware of %s lacks AES support\n", | |
447 | npe_name(npe_c)); | |
448 | support_aes = 0; | |
449 | break; | |
450 | case 4: | |
451 | case 5: | |
452 | support_aes = 1; | |
453 | break; | |
454 | default: | |
455 | printk(KERN_ERR "Firmware of %s lacks crypto support\n", | |
456 | npe_name(npe_c)); | |
457 | return -ENODEV; | |
458 | } | |
81bef015 CH |
459 | /* buffer_pool will also be used to sometimes store the hmac, |
460 | * so assure it is large enough | |
461 | */ | |
462 | BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc)); | |
463 | buffer_pool = dma_pool_create("buffer", dev, | |
464 | sizeof(struct buffer_desc), 32, 0); | |
465 | ret = -ENOMEM; | |
466 | if (!buffer_pool) { | |
467 | goto err; | |
468 | } | |
469 | ctx_pool = dma_pool_create("context", dev, | |
470 | NPE_CTX_LEN, 16, 0); | |
471 | if (!ctx_pool) { | |
472 | goto err; | |
473 | } | |
1777f1a9 KH |
474 | ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0, |
475 | "ixp_crypto:out", NULL); | |
81bef015 CH |
476 | if (ret) |
477 | goto err; | |
1777f1a9 KH |
478 | ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0, |
479 | "ixp_crypto:in", NULL); | |
81bef015 CH |
480 | if (ret) { |
481 | qmgr_release_queue(SEND_QID); | |
482 | goto err; | |
483 | } | |
484 | qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL); | |
485 | tasklet_init(&crypto_done_tasklet, crypto_done_action, 0); | |
486 | ||
487 | qmgr_enable_irq(RECV_QID); | |
488 | return 0; | |
295c01f9 CH |
489 | |
490 | npe_error: | |
491 | printk(KERN_ERR "%s not responding\n", npe_name(npe_c)); | |
492 | ret = -EIO; | |
81bef015 CH |
493 | err: |
494 | if (ctx_pool) | |
495 | dma_pool_destroy(ctx_pool); | |
496 | if (buffer_pool) | |
497 | dma_pool_destroy(buffer_pool); | |
498 | npe_release(npe_c); | |
499 | return ret; | |
500 | } | |
501 | ||
502 | static void release_ixp_crypto(void) | |
503 | { | |
504 | qmgr_disable_irq(RECV_QID); | |
505 | tasklet_kill(&crypto_done_tasklet); | |
506 | ||
507 | qmgr_release_queue(SEND_QID); | |
508 | qmgr_release_queue(RECV_QID); | |
509 | ||
510 | dma_pool_destroy(ctx_pool); | |
511 | dma_pool_destroy(buffer_pool); | |
512 | ||
513 | npe_release(npe_c); | |
514 | ||
515 | if (crypt_virt) { | |
516 | dma_free_coherent(dev, | |
517 | NPE_QLEN_TOTAL * sizeof( struct crypt_ctl), | |
518 | crypt_virt, crypt_phys); | |
519 | } | |
520 | return; | |
521 | } | |
522 | ||
523 | static void reset_sa_dir(struct ix_sa_dir *dir) | |
524 | { | |
525 | memset(dir->npe_ctx, 0, NPE_CTX_LEN); | |
526 | dir->npe_ctx_idx = 0; | |
527 | dir->npe_mode = 0; | |
528 | } | |
529 | ||
530 | static int init_sa_dir(struct ix_sa_dir *dir) | |
531 | { | |
532 | dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys); | |
533 | if (!dir->npe_ctx) { | |
534 | return -ENOMEM; | |
535 | } | |
536 | reset_sa_dir(dir); | |
537 | return 0; | |
538 | } | |
539 | ||
540 | static void free_sa_dir(struct ix_sa_dir *dir) | |
541 | { | |
542 | memset(dir->npe_ctx, 0, NPE_CTX_LEN); | |
543 | dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys); | |
544 | } | |
545 | ||
546 | static int init_tfm(struct crypto_tfm *tfm) | |
547 | { | |
548 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); | |
549 | int ret; | |
550 | ||
551 | atomic_set(&ctx->configuring, 0); | |
552 | ret = init_sa_dir(&ctx->encrypt); | |
553 | if (ret) | |
554 | return ret; | |
555 | ret = init_sa_dir(&ctx->decrypt); | |
556 | if (ret) { | |
557 | free_sa_dir(&ctx->encrypt); | |
558 | } | |
559 | return ret; | |
560 | } | |
561 | ||
562 | static int init_tfm_ablk(struct crypto_tfm *tfm) | |
563 | { | |
564 | tfm->crt_ablkcipher.reqsize = sizeof(struct ablk_ctx); | |
565 | return init_tfm(tfm); | |
566 | } | |
567 | ||
568 | static int init_tfm_aead(struct crypto_tfm *tfm) | |
569 | { | |
570 | tfm->crt_aead.reqsize = sizeof(struct aead_ctx); | |
571 | return init_tfm(tfm); | |
572 | } | |
573 | ||
574 | static void exit_tfm(struct crypto_tfm *tfm) | |
575 | { | |
576 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); | |
577 | free_sa_dir(&ctx->encrypt); | |
578 | free_sa_dir(&ctx->decrypt); | |
579 | } | |
580 | ||
581 | static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target, | |
582 | int init_len, u32 ctx_addr, const u8 *key, int key_len) | |
583 | { | |
584 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); | |
585 | struct crypt_ctl *crypt; | |
586 | struct buffer_desc *buf; | |
587 | int i; | |
588 | u8 *pad; | |
589 | u32 pad_phys, buf_phys; | |
590 | ||
591 | BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN); | |
592 | pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys); | |
593 | if (!pad) | |
594 | return -ENOMEM; | |
595 | buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys); | |
596 | if (!buf) { | |
597 | dma_pool_free(ctx_pool, pad, pad_phys); | |
598 | return -ENOMEM; | |
599 | } | |
600 | crypt = get_crypt_desc_emerg(); | |
601 | if (!crypt) { | |
602 | dma_pool_free(ctx_pool, pad, pad_phys); | |
603 | dma_pool_free(buffer_pool, buf, buf_phys); | |
604 | return -EAGAIN; | |
605 | } | |
606 | ||
607 | memcpy(pad, key, key_len); | |
608 | memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len); | |
609 | for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) { | |
610 | pad[i] ^= xpad; | |
611 | } | |
612 | ||
613 | crypt->data.tfm = tfm; | |
614 | crypt->regist_ptr = pad; | |
615 | crypt->regist_buf = buf; | |
616 | ||
617 | crypt->auth_offs = 0; | |
618 | crypt->auth_len = HMAC_PAD_BLOCKLEN; | |
619 | crypt->crypto_ctx = ctx_addr; | |
620 | crypt->src_buf = buf_phys; | |
621 | crypt->icv_rev_aes = target; | |
622 | crypt->mode = NPE_OP_HASH_GEN_ICV; | |
623 | crypt->init_len = init_len; | |
624 | crypt->ctl_flags |= CTL_FLAG_GEN_ICV; | |
625 | ||
626 | buf->next = 0; | |
627 | buf->buf_len = HMAC_PAD_BLOCKLEN; | |
628 | buf->pkt_len = 0; | |
629 | buf->phys_addr = pad_phys; | |
630 | ||
631 | atomic_inc(&ctx->configuring); | |
632 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); | |
633 | BUG_ON(qmgr_stat_overflow(SEND_QID)); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize, | |
638 | const u8 *key, int key_len, unsigned digest_len) | |
639 | { | |
640 | u32 itarget, otarget, npe_ctx_addr; | |
641 | unsigned char *cinfo; | |
642 | int init_len, ret = 0; | |
643 | u32 cfgword; | |
644 | struct ix_sa_dir *dir; | |
645 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); | |
646 | const struct ix_hash_algo *algo; | |
647 | ||
648 | dir = encrypt ? &ctx->encrypt : &ctx->decrypt; | |
649 | cinfo = dir->npe_ctx + dir->npe_ctx_idx; | |
650 | algo = ix_hash(tfm); | |
651 | ||
652 | /* write cfg word to cryptinfo */ | |
653 | cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */ | |
654 | *(u32*)cinfo = cpu_to_be32(cfgword); | |
655 | cinfo += sizeof(cfgword); | |
656 | ||
657 | /* write ICV to cryptinfo */ | |
658 | memcpy(cinfo, algo->icv, digest_len); | |
659 | cinfo += digest_len; | |
660 | ||
661 | itarget = dir->npe_ctx_phys + dir->npe_ctx_idx | |
662 | + sizeof(algo->cfgword); | |
663 | otarget = itarget + digest_len; | |
664 | init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx); | |
665 | npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx; | |
666 | ||
667 | dir->npe_ctx_idx += init_len; | |
668 | dir->npe_mode |= NPE_OP_HASH_ENABLE; | |
669 | ||
670 | if (!encrypt) | |
671 | dir->npe_mode |= NPE_OP_HASH_VERIFY; | |
672 | ||
673 | ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget, | |
674 | init_len, npe_ctx_addr, key, key_len); | |
675 | if (ret) | |
676 | return ret; | |
677 | return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget, | |
678 | init_len, npe_ctx_addr, key, key_len); | |
679 | } | |
680 | ||
681 | static int gen_rev_aes_key(struct crypto_tfm *tfm) | |
682 | { | |
683 | struct crypt_ctl *crypt; | |
684 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); | |
685 | struct ix_sa_dir *dir = &ctx->decrypt; | |
686 | ||
687 | crypt = get_crypt_desc_emerg(); | |
688 | if (!crypt) { | |
689 | return -EAGAIN; | |
690 | } | |
691 | *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR); | |
692 | ||
693 | crypt->data.tfm = tfm; | |
694 | crypt->crypt_offs = 0; | |
695 | crypt->crypt_len = AES_BLOCK128; | |
696 | crypt->src_buf = 0; | |
697 | crypt->crypto_ctx = dir->npe_ctx_phys; | |
698 | crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32); | |
699 | crypt->mode = NPE_OP_ENC_GEN_KEY; | |
700 | crypt->init_len = dir->npe_ctx_idx; | |
701 | crypt->ctl_flags |= CTL_FLAG_GEN_REVAES; | |
702 | ||
703 | atomic_inc(&ctx->configuring); | |
704 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); | |
705 | BUG_ON(qmgr_stat_overflow(SEND_QID)); | |
706 | return 0; | |
707 | } | |
708 | ||
709 | static int setup_cipher(struct crypto_tfm *tfm, int encrypt, | |
710 | const u8 *key, int key_len) | |
711 | { | |
712 | u8 *cinfo; | |
713 | u32 cipher_cfg; | |
714 | u32 keylen_cfg = 0; | |
715 | struct ix_sa_dir *dir; | |
716 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); | |
717 | u32 *flags = &tfm->crt_flags; | |
718 | ||
719 | dir = encrypt ? &ctx->encrypt : &ctx->decrypt; | |
720 | cinfo = dir->npe_ctx; | |
721 | ||
722 | if (encrypt) { | |
723 | cipher_cfg = cipher_cfg_enc(tfm); | |
724 | dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT; | |
725 | } else { | |
726 | cipher_cfg = cipher_cfg_dec(tfm); | |
727 | } | |
728 | if (cipher_cfg & MOD_AES) { | |
729 | switch (key_len) { | |
730 | case 16: keylen_cfg = MOD_AES128 | KEYLEN_128; break; | |
731 | case 24: keylen_cfg = MOD_AES192 | KEYLEN_192; break; | |
732 | case 32: keylen_cfg = MOD_AES256 | KEYLEN_256; break; | |
733 | default: | |
734 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
735 | return -EINVAL; | |
736 | } | |
737 | cipher_cfg |= keylen_cfg; | |
738 | } else if (cipher_cfg & MOD_3DES) { | |
739 | const u32 *K = (const u32 *)key; | |
740 | if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) || | |
741 | !((K[2] ^ K[4]) | (K[3] ^ K[5])))) | |
742 | { | |
743 | *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED; | |
744 | return -EINVAL; | |
745 | } | |
746 | } else { | |
747 | u32 tmp[DES_EXPKEY_WORDS]; | |
748 | if (des_ekey(tmp, key) == 0) { | |
749 | *flags |= CRYPTO_TFM_RES_WEAK_KEY; | |
750 | } | |
751 | } | |
752 | /* write cfg word to cryptinfo */ | |
753 | *(u32*)cinfo = cpu_to_be32(cipher_cfg); | |
754 | cinfo += sizeof(cipher_cfg); | |
755 | ||
756 | /* write cipher key to cryptinfo */ | |
757 | memcpy(cinfo, key, key_len); | |
758 | /* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */ | |
759 | if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) { | |
760 | memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len); | |
761 | key_len = DES3_EDE_KEY_SIZE; | |
762 | } | |
763 | dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len; | |
764 | dir->npe_mode |= NPE_OP_CRYPT_ENABLE; | |
765 | if ((cipher_cfg & MOD_AES) && !encrypt) { | |
766 | return gen_rev_aes_key(tfm); | |
767 | } | |
768 | return 0; | |
769 | } | |
770 | ||
0d44dc59 CH |
771 | static struct buffer_desc *chainup_buffers(struct device *dev, |
772 | struct scatterlist *sg, unsigned nbytes, | |
773 | struct buffer_desc *buf, gfp_t flags, | |
774 | enum dma_data_direction dir) | |
81bef015 | 775 | { |
0d44dc59 CH |
776 | for (;nbytes > 0; sg = scatterwalk_sg_next(sg)) { |
777 | unsigned len = min(nbytes, sg->length); | |
81bef015 CH |
778 | struct buffer_desc *next_buf; |
779 | u32 next_buf_phys; | |
0d44dc59 | 780 | void *ptr; |
81bef015 | 781 | |
81bef015 | 782 | nbytes -= len; |
0d44dc59 | 783 | ptr = page_address(sg_page(sg)) + sg->offset; |
81bef015 | 784 | next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys); |
0d44dc59 CH |
785 | if (!next_buf) { |
786 | buf = NULL; | |
787 | break; | |
788 | } | |
789 | sg_dma_address(sg) = dma_map_single(dev, ptr, len, dir); | |
81bef015 CH |
790 | buf->next = next_buf; |
791 | buf->phys_next = next_buf_phys; | |
81bef015 | 792 | buf = next_buf; |
0d44dc59 | 793 | |
81bef015 CH |
794 | buf->phys_addr = sg_dma_address(sg); |
795 | buf->buf_len = len; | |
0d44dc59 | 796 | buf->dir = dir; |
81bef015 | 797 | } |
0d44dc59 CH |
798 | buf->next = NULL; |
799 | buf->phys_next = 0; | |
81bef015 CH |
800 | return buf; |
801 | } | |
802 | ||
803 | static int ablk_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
804 | unsigned int key_len) | |
805 | { | |
806 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
807 | u32 *flags = &tfm->base.crt_flags; | |
808 | int ret; | |
809 | ||
810 | init_completion(&ctx->completion); | |
811 | atomic_inc(&ctx->configuring); | |
812 | ||
813 | reset_sa_dir(&ctx->encrypt); | |
814 | reset_sa_dir(&ctx->decrypt); | |
815 | ||
816 | ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE; | |
817 | ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE; | |
818 | ||
819 | ret = setup_cipher(&tfm->base, 0, key, key_len); | |
820 | if (ret) | |
821 | goto out; | |
822 | ret = setup_cipher(&tfm->base, 1, key, key_len); | |
823 | if (ret) | |
824 | goto out; | |
825 | ||
826 | if (*flags & CRYPTO_TFM_RES_WEAK_KEY) { | |
827 | if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) { | |
828 | ret = -EINVAL; | |
829 | } else { | |
830 | *flags &= ~CRYPTO_TFM_RES_WEAK_KEY; | |
831 | } | |
832 | } | |
833 | out: | |
834 | if (!atomic_dec_and_test(&ctx->configuring)) | |
835 | wait_for_completion(&ctx->completion); | |
836 | return ret; | |
837 | } | |
838 | ||
839 | static int ablk_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key, | |
840 | unsigned int key_len) | |
841 | { | |
842 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
843 | ||
844 | /* the nonce is stored in bytes at end of key */ | |
845 | if (key_len < CTR_RFC3686_NONCE_SIZE) | |
846 | return -EINVAL; | |
847 | ||
848 | memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE), | |
849 | CTR_RFC3686_NONCE_SIZE); | |
850 | ||
851 | key_len -= CTR_RFC3686_NONCE_SIZE; | |
852 | return ablk_setkey(tfm, key, key_len); | |
853 | } | |
854 | ||
855 | static int ablk_perform(struct ablkcipher_request *req, int encrypt) | |
856 | { | |
857 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); | |
858 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
859 | unsigned ivsize = crypto_ablkcipher_ivsize(tfm); | |
81bef015 CH |
860 | struct ix_sa_dir *dir; |
861 | struct crypt_ctl *crypt; | |
0d44dc59 | 862 | unsigned int nbytes = req->nbytes; |
81bef015 CH |
863 | enum dma_data_direction src_direction = DMA_BIDIRECTIONAL; |
864 | struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req); | |
0d44dc59 | 865 | struct buffer_desc src_hook; |
81bef015 CH |
866 | gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? |
867 | GFP_KERNEL : GFP_ATOMIC; | |
868 | ||
869 | if (qmgr_stat_full(SEND_QID)) | |
870 | return -EAGAIN; | |
871 | if (atomic_read(&ctx->configuring)) | |
872 | return -EAGAIN; | |
873 | ||
874 | dir = encrypt ? &ctx->encrypt : &ctx->decrypt; | |
875 | ||
876 | crypt = get_crypt_desc(); | |
877 | if (!crypt) | |
0d44dc59 | 878 | return -ENOMEM; |
81bef015 CH |
879 | |
880 | crypt->data.ablk_req = req; | |
881 | crypt->crypto_ctx = dir->npe_ctx_phys; | |
882 | crypt->mode = dir->npe_mode; | |
883 | crypt->init_len = dir->npe_ctx_idx; | |
884 | ||
885 | crypt->crypt_offs = 0; | |
886 | crypt->crypt_len = nbytes; | |
887 | ||
888 | BUG_ON(ivsize && !req->info); | |
889 | memcpy(crypt->iv, req->info, ivsize); | |
890 | if (req->src != req->dst) { | |
0d44dc59 | 891 | struct buffer_desc dst_hook; |
81bef015 | 892 | crypt->mode |= NPE_OP_NOT_IN_PLACE; |
81bef015 CH |
893 | /* This was never tested by Intel |
894 | * for more than one dst buffer, I think. */ | |
0d44dc59 CH |
895 | BUG_ON(req->dst->length < nbytes); |
896 | req_ctx->dst = NULL; | |
897 | if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook, | |
898 | flags, DMA_FROM_DEVICE)) | |
81bef015 CH |
899 | goto free_buf_dest; |
900 | src_direction = DMA_TO_DEVICE; | |
0d44dc59 CH |
901 | req_ctx->dst = dst_hook.next; |
902 | crypt->dst_buf = dst_hook.phys_next; | |
81bef015 CH |
903 | } else { |
904 | req_ctx->dst = NULL; | |
81bef015 | 905 | } |
0d44dc59 CH |
906 | req_ctx->src = NULL; |
907 | if (!chainup_buffers(dev, req->src, nbytes, &src_hook, | |
908 | flags, src_direction)) | |
81bef015 CH |
909 | goto free_buf_src; |
910 | ||
0d44dc59 CH |
911 | req_ctx->src = src_hook.next; |
912 | crypt->src_buf = src_hook.phys_next; | |
81bef015 CH |
913 | crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK; |
914 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); | |
915 | BUG_ON(qmgr_stat_overflow(SEND_QID)); | |
916 | return -EINPROGRESS; | |
917 | ||
918 | free_buf_src: | |
0d44dc59 | 919 | free_buf_chain(dev, req_ctx->src, crypt->src_buf); |
81bef015 CH |
920 | free_buf_dest: |
921 | if (req->src != req->dst) { | |
0d44dc59 | 922 | free_buf_chain(dev, req_ctx->dst, crypt->dst_buf); |
81bef015 CH |
923 | } |
924 | crypt->ctl_flags = CTL_FLAG_UNUSED; | |
0d44dc59 | 925 | return -ENOMEM; |
81bef015 CH |
926 | } |
927 | ||
928 | static int ablk_encrypt(struct ablkcipher_request *req) | |
929 | { | |
930 | return ablk_perform(req, 1); | |
931 | } | |
932 | ||
933 | static int ablk_decrypt(struct ablkcipher_request *req) | |
934 | { | |
935 | return ablk_perform(req, 0); | |
936 | } | |
937 | ||
938 | static int ablk_rfc3686_crypt(struct ablkcipher_request *req) | |
939 | { | |
940 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); | |
941 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
942 | u8 iv[CTR_RFC3686_BLOCK_SIZE]; | |
943 | u8 *info = req->info; | |
944 | int ret; | |
945 | ||
946 | /* set up counter block */ | |
947 | memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE); | |
948 | memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE); | |
949 | ||
950 | /* initialize counter portion of counter block */ | |
951 | *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) = | |
952 | cpu_to_be32(1); | |
953 | ||
954 | req->info = iv; | |
955 | ret = ablk_perform(req, 1); | |
956 | req->info = info; | |
957 | return ret; | |
958 | } | |
959 | ||
960 | static int hmac_inconsistent(struct scatterlist *sg, unsigned start, | |
961 | unsigned int nbytes) | |
962 | { | |
963 | int offset = 0; | |
964 | ||
965 | if (!nbytes) | |
966 | return 0; | |
967 | ||
968 | for (;;) { | |
969 | if (start < offset + sg->length) | |
970 | break; | |
971 | ||
972 | offset += sg->length; | |
0d44dc59 | 973 | sg = scatterwalk_sg_next(sg); |
81bef015 CH |
974 | } |
975 | return (start + nbytes > offset + sg->length); | |
976 | } | |
977 | ||
978 | static int aead_perform(struct aead_request *req, int encrypt, | |
979 | int cryptoffset, int eff_cryptlen, u8 *iv) | |
980 | { | |
981 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); | |
982 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); | |
983 | unsigned ivsize = crypto_aead_ivsize(tfm); | |
984 | unsigned authsize = crypto_aead_authsize(tfm); | |
81bef015 CH |
985 | struct ix_sa_dir *dir; |
986 | struct crypt_ctl *crypt; | |
0d44dc59 CH |
987 | unsigned int cryptlen; |
988 | struct buffer_desc *buf, src_hook; | |
81bef015 CH |
989 | struct aead_ctx *req_ctx = aead_request_ctx(req); |
990 | gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? | |
991 | GFP_KERNEL : GFP_ATOMIC; | |
992 | ||
993 | if (qmgr_stat_full(SEND_QID)) | |
994 | return -EAGAIN; | |
995 | if (atomic_read(&ctx->configuring)) | |
996 | return -EAGAIN; | |
997 | ||
998 | if (encrypt) { | |
999 | dir = &ctx->encrypt; | |
1000 | cryptlen = req->cryptlen; | |
1001 | } else { | |
1002 | dir = &ctx->decrypt; | |
1003 | /* req->cryptlen includes the authsize when decrypting */ | |
1004 | cryptlen = req->cryptlen -authsize; | |
1005 | eff_cryptlen -= authsize; | |
1006 | } | |
1007 | crypt = get_crypt_desc(); | |
1008 | if (!crypt) | |
0d44dc59 | 1009 | return -ENOMEM; |
81bef015 CH |
1010 | |
1011 | crypt->data.aead_req = req; | |
1012 | crypt->crypto_ctx = dir->npe_ctx_phys; | |
1013 | crypt->mode = dir->npe_mode; | |
1014 | crypt->init_len = dir->npe_ctx_idx; | |
1015 | ||
1016 | crypt->crypt_offs = cryptoffset; | |
1017 | crypt->crypt_len = eff_cryptlen; | |
1018 | ||
1019 | crypt->auth_offs = 0; | |
1020 | crypt->auth_len = req->assoclen + ivsize + cryptlen; | |
1021 | BUG_ON(ivsize && !req->iv); | |
1022 | memcpy(crypt->iv, req->iv, ivsize); | |
1023 | ||
1024 | if (req->src != req->dst) { | |
1025 | BUG(); /* -ENOTSUP because of my lazyness */ | |
1026 | } | |
1027 | ||
81bef015 | 1028 | /* ASSOC data */ |
0d44dc59 CH |
1029 | buf = chainup_buffers(dev, req->assoc, req->assoclen, &src_hook, |
1030 | flags, DMA_TO_DEVICE); | |
1031 | req_ctx->buffer = src_hook.next; | |
1032 | crypt->src_buf = src_hook.phys_next; | |
81bef015 | 1033 | if (!buf) |
0d44dc59 | 1034 | goto out; |
81bef015 CH |
1035 | /* IV */ |
1036 | sg_init_table(&req_ctx->ivlist, 1); | |
1037 | sg_set_buf(&req_ctx->ivlist, iv, ivsize); | |
0d44dc59 CH |
1038 | buf = chainup_buffers(dev, &req_ctx->ivlist, ivsize, buf, flags, |
1039 | DMA_BIDIRECTIONAL); | |
81bef015 | 1040 | if (!buf) |
0d44dc59 | 1041 | goto free_chain; |
81bef015 CH |
1042 | if (unlikely(hmac_inconsistent(req->src, cryptlen, authsize))) { |
1043 | /* The 12 hmac bytes are scattered, | |
1044 | * we need to copy them into a safe buffer */ | |
1045 | req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags, | |
1046 | &crypt->icv_rev_aes); | |
1047 | if (unlikely(!req_ctx->hmac_virt)) | |
0d44dc59 | 1048 | goto free_chain; |
81bef015 CH |
1049 | if (!encrypt) { |
1050 | scatterwalk_map_and_copy(req_ctx->hmac_virt, | |
1051 | req->src, cryptlen, authsize, 0); | |
1052 | } | |
1053 | req_ctx->encrypt = encrypt; | |
1054 | } else { | |
1055 | req_ctx->hmac_virt = NULL; | |
1056 | } | |
1057 | /* Crypt */ | |
0d44dc59 CH |
1058 | buf = chainup_buffers(dev, req->src, cryptlen + authsize, buf, flags, |
1059 | DMA_BIDIRECTIONAL); | |
81bef015 | 1060 | if (!buf) |
0d44dc59 | 1061 | goto free_hmac_virt; |
81bef015 CH |
1062 | if (!req_ctx->hmac_virt) { |
1063 | crypt->icv_rev_aes = buf->phys_addr + buf->buf_len - authsize; | |
1064 | } | |
0d44dc59 | 1065 | |
81bef015 CH |
1066 | crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD; |
1067 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); | |
1068 | BUG_ON(qmgr_stat_overflow(SEND_QID)); | |
1069 | return -EINPROGRESS; | |
0d44dc59 | 1070 | free_hmac_virt: |
81bef015 CH |
1071 | if (req_ctx->hmac_virt) { |
1072 | dma_pool_free(buffer_pool, req_ctx->hmac_virt, | |
1073 | crypt->icv_rev_aes); | |
1074 | } | |
0d44dc59 CH |
1075 | free_chain: |
1076 | free_buf_chain(dev, req_ctx->buffer, crypt->src_buf); | |
81bef015 CH |
1077 | out: |
1078 | crypt->ctl_flags = CTL_FLAG_UNUSED; | |
0d44dc59 | 1079 | return -ENOMEM; |
81bef015 CH |
1080 | } |
1081 | ||
1082 | static int aead_setup(struct crypto_aead *tfm, unsigned int authsize) | |
1083 | { | |
1084 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); | |
1085 | u32 *flags = &tfm->base.crt_flags; | |
1086 | unsigned digest_len = crypto_aead_alg(tfm)->maxauthsize; | |
1087 | int ret; | |
1088 | ||
1089 | if (!ctx->enckey_len && !ctx->authkey_len) | |
1090 | return 0; | |
1091 | init_completion(&ctx->completion); | |
1092 | atomic_inc(&ctx->configuring); | |
1093 | ||
1094 | reset_sa_dir(&ctx->encrypt); | |
1095 | reset_sa_dir(&ctx->decrypt); | |
1096 | ||
1097 | ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len); | |
1098 | if (ret) | |
1099 | goto out; | |
1100 | ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len); | |
1101 | if (ret) | |
1102 | goto out; | |
1103 | ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey, | |
1104 | ctx->authkey_len, digest_len); | |
1105 | if (ret) | |
1106 | goto out; | |
1107 | ret = setup_auth(&tfm->base, 1, authsize, ctx->authkey, | |
1108 | ctx->authkey_len, digest_len); | |
1109 | if (ret) | |
1110 | goto out; | |
1111 | ||
1112 | if (*flags & CRYPTO_TFM_RES_WEAK_KEY) { | |
1113 | if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) { | |
1114 | ret = -EINVAL; | |
1115 | goto out; | |
1116 | } else { | |
1117 | *flags &= ~CRYPTO_TFM_RES_WEAK_KEY; | |
1118 | } | |
1119 | } | |
1120 | out: | |
1121 | if (!atomic_dec_and_test(&ctx->configuring)) | |
1122 | wait_for_completion(&ctx->completion); | |
1123 | return ret; | |
1124 | } | |
1125 | ||
1126 | static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize) | |
1127 | { | |
1128 | int max = crypto_aead_alg(tfm)->maxauthsize >> 2; | |
1129 | ||
1130 | if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3)) | |
1131 | return -EINVAL; | |
1132 | return aead_setup(tfm, authsize); | |
1133 | } | |
1134 | ||
1135 | static int aead_setkey(struct crypto_aead *tfm, const u8 *key, | |
1136 | unsigned int keylen) | |
1137 | { | |
1138 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); | |
1139 | struct rtattr *rta = (struct rtattr *)key; | |
1140 | struct crypto_authenc_key_param *param; | |
1141 | ||
1142 | if (!RTA_OK(rta, keylen)) | |
1143 | goto badkey; | |
1144 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) | |
1145 | goto badkey; | |
1146 | if (RTA_PAYLOAD(rta) < sizeof(*param)) | |
1147 | goto badkey; | |
1148 | ||
1149 | param = RTA_DATA(rta); | |
1150 | ctx->enckey_len = be32_to_cpu(param->enckeylen); | |
1151 | ||
1152 | key += RTA_ALIGN(rta->rta_len); | |
1153 | keylen -= RTA_ALIGN(rta->rta_len); | |
1154 | ||
1155 | if (keylen < ctx->enckey_len) | |
1156 | goto badkey; | |
1157 | ||
1158 | ctx->authkey_len = keylen - ctx->enckey_len; | |
1159 | memcpy(ctx->enckey, key + ctx->authkey_len, ctx->enckey_len); | |
1160 | memcpy(ctx->authkey, key, ctx->authkey_len); | |
1161 | ||
1162 | return aead_setup(tfm, crypto_aead_authsize(tfm)); | |
1163 | badkey: | |
1164 | ctx->enckey_len = 0; | |
1165 | crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); | |
1166 | return -EINVAL; | |
1167 | } | |
1168 | ||
1169 | static int aead_encrypt(struct aead_request *req) | |
1170 | { | |
1171 | unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req)); | |
1172 | return aead_perform(req, 1, req->assoclen + ivsize, | |
1173 | req->cryptlen, req->iv); | |
1174 | } | |
1175 | ||
1176 | static int aead_decrypt(struct aead_request *req) | |
1177 | { | |
1178 | unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req)); | |
1179 | return aead_perform(req, 0, req->assoclen + ivsize, | |
1180 | req->cryptlen, req->iv); | |
1181 | } | |
1182 | ||
1183 | static int aead_givencrypt(struct aead_givcrypt_request *req) | |
1184 | { | |
1185 | struct crypto_aead *tfm = aead_givcrypt_reqtfm(req); | |
1186 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); | |
1187 | unsigned len, ivsize = crypto_aead_ivsize(tfm); | |
1188 | __be64 seq; | |
1189 | ||
1190 | /* copied from eseqiv.c */ | |
1191 | if (!ctx->salted) { | |
1192 | get_random_bytes(ctx->salt, ivsize); | |
1193 | ctx->salted = 1; | |
1194 | } | |
1195 | memcpy(req->areq.iv, ctx->salt, ivsize); | |
1196 | len = ivsize; | |
1197 | if (ivsize > sizeof(u64)) { | |
1198 | memset(req->giv, 0, ivsize - sizeof(u64)); | |
1199 | len = sizeof(u64); | |
1200 | } | |
1201 | seq = cpu_to_be64(req->seq); | |
1202 | memcpy(req->giv + ivsize - len, &seq, len); | |
1203 | return aead_perform(&req->areq, 1, req->areq.assoclen, | |
1204 | req->areq.cryptlen +ivsize, req->giv); | |
1205 | } | |
1206 | ||
1207 | static struct ixp_alg ixp4xx_algos[] = { | |
1208 | { | |
1209 | .crypto = { | |
1210 | .cra_name = "cbc(des)", | |
1211 | .cra_blocksize = DES_BLOCK_SIZE, | |
1212 | .cra_u = { .ablkcipher = { | |
1213 | .min_keysize = DES_KEY_SIZE, | |
1214 | .max_keysize = DES_KEY_SIZE, | |
1215 | .ivsize = DES_BLOCK_SIZE, | |
1216 | .geniv = "eseqiv", | |
1217 | } | |
1218 | } | |
1219 | }, | |
1220 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192, | |
1221 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192, | |
1222 | ||
1223 | }, { | |
1224 | .crypto = { | |
1225 | .cra_name = "ecb(des)", | |
1226 | .cra_blocksize = DES_BLOCK_SIZE, | |
1227 | .cra_u = { .ablkcipher = { | |
1228 | .min_keysize = DES_KEY_SIZE, | |
1229 | .max_keysize = DES_KEY_SIZE, | |
1230 | } | |
1231 | } | |
1232 | }, | |
1233 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192, | |
1234 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192, | |
1235 | }, { | |
1236 | .crypto = { | |
1237 | .cra_name = "cbc(des3_ede)", | |
1238 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1239 | .cra_u = { .ablkcipher = { | |
1240 | .min_keysize = DES3_EDE_KEY_SIZE, | |
1241 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1242 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1243 | .geniv = "eseqiv", | |
1244 | } | |
1245 | } | |
1246 | }, | |
1247 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192, | |
1248 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192, | |
1249 | }, { | |
1250 | .crypto = { | |
1251 | .cra_name = "ecb(des3_ede)", | |
1252 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1253 | .cra_u = { .ablkcipher = { | |
1254 | .min_keysize = DES3_EDE_KEY_SIZE, | |
1255 | .max_keysize = DES3_EDE_KEY_SIZE, | |
1256 | } | |
1257 | } | |
1258 | }, | |
1259 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192, | |
1260 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192, | |
1261 | }, { | |
1262 | .crypto = { | |
1263 | .cra_name = "cbc(aes)", | |
1264 | .cra_blocksize = AES_BLOCK_SIZE, | |
1265 | .cra_u = { .ablkcipher = { | |
1266 | .min_keysize = AES_MIN_KEY_SIZE, | |
1267 | .max_keysize = AES_MAX_KEY_SIZE, | |
1268 | .ivsize = AES_BLOCK_SIZE, | |
1269 | .geniv = "eseqiv", | |
1270 | } | |
1271 | } | |
1272 | }, | |
1273 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC, | |
1274 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC, | |
1275 | }, { | |
1276 | .crypto = { | |
1277 | .cra_name = "ecb(aes)", | |
1278 | .cra_blocksize = AES_BLOCK_SIZE, | |
1279 | .cra_u = { .ablkcipher = { | |
1280 | .min_keysize = AES_MIN_KEY_SIZE, | |
1281 | .max_keysize = AES_MAX_KEY_SIZE, | |
1282 | } | |
1283 | } | |
1284 | }, | |
1285 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB, | |
1286 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB, | |
1287 | }, { | |
1288 | .crypto = { | |
1289 | .cra_name = "ctr(aes)", | |
1290 | .cra_blocksize = AES_BLOCK_SIZE, | |
1291 | .cra_u = { .ablkcipher = { | |
1292 | .min_keysize = AES_MIN_KEY_SIZE, | |
1293 | .max_keysize = AES_MAX_KEY_SIZE, | |
1294 | .ivsize = AES_BLOCK_SIZE, | |
1295 | .geniv = "eseqiv", | |
1296 | } | |
1297 | } | |
1298 | }, | |
1299 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR, | |
1300 | .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR, | |
1301 | }, { | |
1302 | .crypto = { | |
1303 | .cra_name = "rfc3686(ctr(aes))", | |
1304 | .cra_blocksize = AES_BLOCK_SIZE, | |
1305 | .cra_u = { .ablkcipher = { | |
1306 | .min_keysize = AES_MIN_KEY_SIZE, | |
1307 | .max_keysize = AES_MAX_KEY_SIZE, | |
1308 | .ivsize = AES_BLOCK_SIZE, | |
1309 | .geniv = "eseqiv", | |
1310 | .setkey = ablk_rfc3686_setkey, | |
1311 | .encrypt = ablk_rfc3686_crypt, | |
1312 | .decrypt = ablk_rfc3686_crypt } | |
1313 | } | |
1314 | }, | |
1315 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR, | |
1316 | .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR, | |
1317 | }, { | |
1318 | .crypto = { | |
1319 | .cra_name = "authenc(hmac(md5),cbc(des))", | |
1320 | .cra_blocksize = DES_BLOCK_SIZE, | |
1321 | .cra_u = { .aead = { | |
1322 | .ivsize = DES_BLOCK_SIZE, | |
1323 | .maxauthsize = MD5_DIGEST_SIZE, | |
1324 | } | |
1325 | } | |
1326 | }, | |
1327 | .hash = &hash_alg_md5, | |
1328 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192, | |
1329 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192, | |
1330 | }, { | |
1331 | .crypto = { | |
1332 | .cra_name = "authenc(hmac(md5),cbc(des3_ede))", | |
1333 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1334 | .cra_u = { .aead = { | |
1335 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1336 | .maxauthsize = MD5_DIGEST_SIZE, | |
1337 | } | |
1338 | } | |
1339 | }, | |
1340 | .hash = &hash_alg_md5, | |
1341 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192, | |
1342 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192, | |
1343 | }, { | |
1344 | .crypto = { | |
1345 | .cra_name = "authenc(hmac(sha1),cbc(des))", | |
1346 | .cra_blocksize = DES_BLOCK_SIZE, | |
1347 | .cra_u = { .aead = { | |
1348 | .ivsize = DES_BLOCK_SIZE, | |
1349 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1350 | } | |
1351 | } | |
1352 | }, | |
1353 | .hash = &hash_alg_sha1, | |
1354 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192, | |
1355 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192, | |
1356 | }, { | |
1357 | .crypto = { | |
1358 | .cra_name = "authenc(hmac(sha1),cbc(des3_ede))", | |
1359 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, | |
1360 | .cra_u = { .aead = { | |
1361 | .ivsize = DES3_EDE_BLOCK_SIZE, | |
1362 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1363 | } | |
1364 | } | |
1365 | }, | |
1366 | .hash = &hash_alg_sha1, | |
1367 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192, | |
1368 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192, | |
1369 | }, { | |
1370 | .crypto = { | |
1371 | .cra_name = "authenc(hmac(md5),cbc(aes))", | |
1372 | .cra_blocksize = AES_BLOCK_SIZE, | |
1373 | .cra_u = { .aead = { | |
1374 | .ivsize = AES_BLOCK_SIZE, | |
1375 | .maxauthsize = MD5_DIGEST_SIZE, | |
1376 | } | |
1377 | } | |
1378 | }, | |
1379 | .hash = &hash_alg_md5, | |
1380 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC, | |
1381 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC, | |
1382 | }, { | |
1383 | .crypto = { | |
1384 | .cra_name = "authenc(hmac(sha1),cbc(aes))", | |
1385 | .cra_blocksize = AES_BLOCK_SIZE, | |
1386 | .cra_u = { .aead = { | |
1387 | .ivsize = AES_BLOCK_SIZE, | |
1388 | .maxauthsize = SHA1_DIGEST_SIZE, | |
1389 | } | |
1390 | } | |
1391 | }, | |
1392 | .hash = &hash_alg_sha1, | |
1393 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC, | |
1394 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC, | |
1395 | } }; | |
1396 | ||
1397 | #define IXP_POSTFIX "-ixp4xx" | |
1398 | static int __init ixp_module_init(void) | |
1399 | { | |
1400 | int num = ARRAY_SIZE(ixp4xx_algos); | |
1401 | int i,err ; | |
1402 | ||
1403 | if (platform_device_register(&pseudo_dev)) | |
1404 | return -ENODEV; | |
1405 | ||
1406 | spin_lock_init(&desc_lock); | |
1407 | spin_lock_init(&emerg_lock); | |
1408 | ||
1409 | err = init_ixp_crypto(); | |
1410 | if (err) { | |
1411 | platform_device_unregister(&pseudo_dev); | |
1412 | return err; | |
1413 | } | |
1414 | for (i=0; i< num; i++) { | |
1415 | struct crypto_alg *cra = &ixp4xx_algos[i].crypto; | |
1416 | ||
1417 | if (snprintf(cra->cra_driver_name, CRYPTO_MAX_ALG_NAME, | |
1418 | "%s"IXP_POSTFIX, cra->cra_name) >= | |
1419 | CRYPTO_MAX_ALG_NAME) | |
1420 | { | |
1421 | continue; | |
1422 | } | |
1423 | if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) { | |
1424 | continue; | |
1425 | } | |
1426 | if (!ixp4xx_algos[i].hash) { | |
1427 | /* block ciphers */ | |
1428 | cra->cra_type = &crypto_ablkcipher_type; | |
1429 | cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | | |
1430 | CRYPTO_ALG_ASYNC; | |
1431 | if (!cra->cra_ablkcipher.setkey) | |
1432 | cra->cra_ablkcipher.setkey = ablk_setkey; | |
1433 | if (!cra->cra_ablkcipher.encrypt) | |
1434 | cra->cra_ablkcipher.encrypt = ablk_encrypt; | |
1435 | if (!cra->cra_ablkcipher.decrypt) | |
1436 | cra->cra_ablkcipher.decrypt = ablk_decrypt; | |
1437 | cra->cra_init = init_tfm_ablk; | |
1438 | } else { | |
1439 | /* authenc */ | |
1440 | cra->cra_type = &crypto_aead_type; | |
1441 | cra->cra_flags = CRYPTO_ALG_TYPE_AEAD | | |
1442 | CRYPTO_ALG_ASYNC; | |
1443 | cra->cra_aead.setkey = aead_setkey; | |
1444 | cra->cra_aead.setauthsize = aead_setauthsize; | |
1445 | cra->cra_aead.encrypt = aead_encrypt; | |
1446 | cra->cra_aead.decrypt = aead_decrypt; | |
1447 | cra->cra_aead.givencrypt = aead_givencrypt; | |
1448 | cra->cra_init = init_tfm_aead; | |
1449 | } | |
1450 | cra->cra_ctxsize = sizeof(struct ixp_ctx); | |
1451 | cra->cra_module = THIS_MODULE; | |
1452 | cra->cra_alignmask = 3; | |
1453 | cra->cra_priority = 300; | |
1454 | cra->cra_exit = exit_tfm; | |
1455 | if (crypto_register_alg(cra)) | |
1456 | printk(KERN_ERR "Failed to register '%s'\n", | |
1457 | cra->cra_name); | |
1458 | else | |
1459 | ixp4xx_algos[i].registered = 1; | |
1460 | } | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | static void __exit ixp_module_exit(void) | |
1465 | { | |
1466 | int num = ARRAY_SIZE(ixp4xx_algos); | |
1467 | int i; | |
1468 | ||
1469 | for (i=0; i< num; i++) { | |
1470 | if (ixp4xx_algos[i].registered) | |
1471 | crypto_unregister_alg(&ixp4xx_algos[i].crypto); | |
1472 | } | |
1473 | release_ixp_crypto(); | |
1474 | platform_device_unregister(&pseudo_dev); | |
1475 | } | |
1476 | ||
1477 | module_init(ixp_module_init); | |
1478 | module_exit(ixp_module_exit); | |
1479 | ||
1480 | MODULE_LICENSE("GPL"); | |
1481 | MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>"); | |
1482 | MODULE_DESCRIPTION("IXP4xx hardware crypto"); | |
1483 |