Commit | Line | Data |
---|---|---|
6c833275 ML |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Support for VIA PadLock hardware crypto engine. | |
5 | * | |
6 | * Copyright (c) 2006 Michal Ludvig <michal@logix.cz> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
7d024608 | 15 | #include <crypto/internal/hash.h> |
21493088 | 16 | #include <crypto/padlock.h> |
5265eeb2 | 17 | #include <crypto/sha.h> |
6010439f | 18 | #include <linux/err.h> |
6c833275 ML |
19 | #include <linux/module.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/errno.h> | |
6c833275 ML |
22 | #include <linux/interrupt.h> |
23 | #include <linux/kernel.h> | |
24 | #include <linux/scatterlist.h> | |
3bd391f0 | 25 | #include <asm/cpu_device_id.h> |
df6b35f4 | 26 | #include <asm/fpu/api.h> |
4c6ab3ee | 27 | |
bbbee467 HX |
28 | struct padlock_sha_desc { |
29 | struct shash_desc fallback; | |
6c833275 ML |
30 | }; |
31 | ||
bbbee467 HX |
32 | struct padlock_sha_ctx { |
33 | struct crypto_shash *fallback; | |
34 | }; | |
6c833275 | 35 | |
bbbee467 | 36 | static int padlock_sha_init(struct shash_desc *desc) |
6c833275 | 37 | { |
bbbee467 HX |
38 | struct padlock_sha_desc *dctx = shash_desc_ctx(desc); |
39 | struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm); | |
6c833275 | 40 | |
bbbee467 HX |
41 | dctx->fallback.tfm = ctx->fallback; |
42 | dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; | |
43 | return crypto_shash_init(&dctx->fallback); | |
6c833275 ML |
44 | } |
45 | ||
bbbee467 HX |
46 | static int padlock_sha_update(struct shash_desc *desc, |
47 | const u8 *data, unsigned int length) | |
6c833275 | 48 | { |
bbbee467 | 49 | struct padlock_sha_desc *dctx = shash_desc_ctx(desc); |
6c833275 | 50 | |
bbbee467 HX |
51 | dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; |
52 | return crypto_shash_update(&dctx->fallback, data, length); | |
6c833275 ML |
53 | } |
54 | ||
a8d7ac27 HX |
55 | static int padlock_sha_export(struct shash_desc *desc, void *out) |
56 | { | |
57 | struct padlock_sha_desc *dctx = shash_desc_ctx(desc); | |
58 | ||
59 | return crypto_shash_export(&dctx->fallback, out); | |
60 | } | |
61 | ||
62 | static int padlock_sha_import(struct shash_desc *desc, const void *in) | |
63 | { | |
64 | struct padlock_sha_desc *dctx = shash_desc_ctx(desc); | |
65 | struct padlock_sha_ctx *ctx = crypto_shash_ctx(desc->tfm); | |
66 | ||
67 | dctx->fallback.tfm = ctx->fallback; | |
68 | dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; | |
69 | return crypto_shash_import(&dctx->fallback, in); | |
70 | } | |
71 | ||
6c833275 ML |
72 | static inline void padlock_output_block(uint32_t *src, |
73 | uint32_t *dst, size_t count) | |
74 | { | |
75 | while (count--) | |
76 | *dst++ = swab32(*src++); | |
77 | } | |
78 | ||
bbbee467 HX |
79 | static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in, |
80 | unsigned int count, u8 *out) | |
6c833275 ML |
81 | { |
82 | /* We can't store directly to *out as it may be unaligned. */ | |
83 | /* BTW Don't reduce the buffer size below 128 Bytes! | |
84 | * PadLock microcode needs it that big. */ | |
4c6ab3ee HX |
85 | char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__ |
86 | ((aligned(STACK_ALIGN))); | |
87 | char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT); | |
bbbee467 HX |
88 | struct padlock_sha_desc *dctx = shash_desc_ctx(desc); |
89 | struct sha1_state state; | |
90 | unsigned int space; | |
91 | unsigned int leftover; | |
bbbee467 HX |
92 | int err; |
93 | ||
94 | dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; | |
95 | err = crypto_shash_export(&dctx->fallback, &state); | |
96 | if (err) | |
97 | goto out; | |
98 | ||
99 | if (state.count + count > ULONG_MAX) | |
100 | return crypto_shash_finup(&dctx->fallback, in, count, out); | |
101 | ||
102 | leftover = ((state.count - 1) & (SHA1_BLOCK_SIZE - 1)) + 1; | |
103 | space = SHA1_BLOCK_SIZE - leftover; | |
104 | if (space) { | |
105 | if (count > space) { | |
106 | err = crypto_shash_update(&dctx->fallback, in, space) ?: | |
107 | crypto_shash_export(&dctx->fallback, &state); | |
108 | if (err) | |
109 | goto out; | |
110 | count -= space; | |
111 | in += space; | |
112 | } else { | |
113 | memcpy(state.buffer + leftover, in, count); | |
114 | in = state.buffer; | |
115 | count += leftover; | |
e9b25f16 | 116 | state.count &= ~(SHA1_BLOCK_SIZE - 1); |
bbbee467 HX |
117 | } |
118 | } | |
119 | ||
120 | memcpy(result, &state.state, SHA1_DIGEST_SIZE); | |
6c833275 | 121 | |
6c833275 | 122 | asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */ |
bbbee467 | 123 | : \ |
faae8908 HX |
124 | : "c"((unsigned long)state.count + count), \ |
125 | "a"((unsigned long)state.count), \ | |
bbbee467 | 126 | "S"(in), "D"(result)); |
6c833275 ML |
127 | |
128 | padlock_output_block((uint32_t *)result, (uint32_t *)out, 5); | |
bbbee467 HX |
129 | |
130 | out: | |
131 | return err; | |
6c833275 ML |
132 | } |
133 | ||
bbbee467 HX |
134 | static int padlock_sha1_final(struct shash_desc *desc, u8 *out) |
135 | { | |
136 | u8 buf[4]; | |
137 | ||
138 | return padlock_sha1_finup(desc, buf, 0, out); | |
139 | } | |
140 | ||
141 | static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in, | |
142 | unsigned int count, u8 *out) | |
6c833275 ML |
143 | { |
144 | /* We can't store directly to *out as it may be unaligned. */ | |
145 | /* BTW Don't reduce the buffer size below 128 Bytes! | |
146 | * PadLock microcode needs it that big. */ | |
4c6ab3ee HX |
147 | char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__ |
148 | ((aligned(STACK_ALIGN))); | |
149 | char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT); | |
bbbee467 HX |
150 | struct padlock_sha_desc *dctx = shash_desc_ctx(desc); |
151 | struct sha256_state state; | |
152 | unsigned int space; | |
153 | unsigned int leftover; | |
bbbee467 | 154 | int err; |
6c833275 | 155 | |
bbbee467 HX |
156 | dctx->fallback.flags = desc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; |
157 | err = crypto_shash_export(&dctx->fallback, &state); | |
158 | if (err) | |
159 | goto out; | |
160 | ||
161 | if (state.count + count > ULONG_MAX) | |
162 | return crypto_shash_finup(&dctx->fallback, in, count, out); | |
163 | ||
164 | leftover = ((state.count - 1) & (SHA256_BLOCK_SIZE - 1)) + 1; | |
165 | space = SHA256_BLOCK_SIZE - leftover; | |
166 | if (space) { | |
167 | if (count > space) { | |
168 | err = crypto_shash_update(&dctx->fallback, in, space) ?: | |
169 | crypto_shash_export(&dctx->fallback, &state); | |
170 | if (err) | |
171 | goto out; | |
172 | count -= space; | |
173 | in += space; | |
174 | } else { | |
175 | memcpy(state.buf + leftover, in, count); | |
176 | in = state.buf; | |
177 | count += leftover; | |
e9b25f16 | 178 | state.count &= ~(SHA1_BLOCK_SIZE - 1); |
bbbee467 HX |
179 | } |
180 | } | |
181 | ||
182 | memcpy(result, &state.state, SHA256_DIGEST_SIZE); | |
6c833275 ML |
183 | |
184 | asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */ | |
bbbee467 | 185 | : \ |
faae8908 HX |
186 | : "c"((unsigned long)state.count + count), \ |
187 | "a"((unsigned long)state.count), \ | |
bbbee467 | 188 | "S"(in), "D"(result)); |
6c833275 ML |
189 | |
190 | padlock_output_block((uint32_t *)result, (uint32_t *)out, 8); | |
bbbee467 HX |
191 | |
192 | out: | |
193 | return err; | |
6c833275 ML |
194 | } |
195 | ||
bbbee467 | 196 | static int padlock_sha256_final(struct shash_desc *desc, u8 *out) |
6c833275 | 197 | { |
bbbee467 | 198 | u8 buf[4]; |
6c833275 | 199 | |
bbbee467 | 200 | return padlock_sha256_finup(desc, buf, 0, out); |
6c833275 ML |
201 | } |
202 | ||
6010439f | 203 | static int padlock_cra_init(struct crypto_tfm *tfm) |
6c833275 | 204 | { |
bbbee467 | 205 | struct crypto_shash *hash = __crypto_shash_cast(tfm); |
1f4fe5a3 | 206 | const char *fallback_driver_name = crypto_tfm_alg_name(tfm); |
bbbee467 | 207 | struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm); |
7d024608 HX |
208 | struct crypto_shash *fallback_tfm; |
209 | int err = -ENOMEM; | |
6010439f | 210 | |
6c833275 | 211 | /* Allocate a fallback and abort if it failed. */ |
7d024608 HX |
212 | fallback_tfm = crypto_alloc_shash(fallback_driver_name, 0, |
213 | CRYPTO_ALG_NEED_FALLBACK); | |
6010439f | 214 | if (IS_ERR(fallback_tfm)) { |
6c833275 ML |
215 | printk(KERN_WARNING PFX "Fallback driver '%s' could not be loaded!\n", |
216 | fallback_driver_name); | |
7d024608 | 217 | err = PTR_ERR(fallback_tfm); |
bbbee467 | 218 | goto out; |
6c833275 ML |
219 | } |
220 | ||
bbbee467 HX |
221 | ctx->fallback = fallback_tfm; |
222 | hash->descsize += crypto_shash_descsize(fallback_tfm); | |
6c833275 | 223 | return 0; |
7d024608 | 224 | |
7d024608 HX |
225 | out: |
226 | return err; | |
6c833275 ML |
227 | } |
228 | ||
6c833275 ML |
229 | static void padlock_cra_exit(struct crypto_tfm *tfm) |
230 | { | |
bbbee467 | 231 | struct padlock_sha_ctx *ctx = crypto_tfm_ctx(tfm); |
7d024608 | 232 | |
bbbee467 | 233 | crypto_free_shash(ctx->fallback); |
6c833275 ML |
234 | } |
235 | ||
bbbee467 HX |
236 | static struct shash_alg sha1_alg = { |
237 | .digestsize = SHA1_DIGEST_SIZE, | |
238 | .init = padlock_sha_init, | |
239 | .update = padlock_sha_update, | |
240 | .finup = padlock_sha1_finup, | |
241 | .final = padlock_sha1_final, | |
a8d7ac27 HX |
242 | .export = padlock_sha_export, |
243 | .import = padlock_sha_import, | |
bbbee467 | 244 | .descsize = sizeof(struct padlock_sha_desc), |
a8d7ac27 | 245 | .statesize = sizeof(struct sha1_state), |
bbbee467 HX |
246 | .base = { |
247 | .cra_name = "sha1", | |
248 | .cra_driver_name = "sha1-padlock", | |
249 | .cra_priority = PADLOCK_CRA_PRIORITY, | |
250 | .cra_flags = CRYPTO_ALG_TYPE_SHASH | | |
251 | CRYPTO_ALG_NEED_FALLBACK, | |
252 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
253 | .cra_ctxsize = sizeof(struct padlock_sha_ctx), | |
254 | .cra_module = THIS_MODULE, | |
255 | .cra_init = padlock_cra_init, | |
256 | .cra_exit = padlock_cra_exit, | |
6c833275 ML |
257 | } |
258 | }; | |
259 | ||
bbbee467 HX |
260 | static struct shash_alg sha256_alg = { |
261 | .digestsize = SHA256_DIGEST_SIZE, | |
262 | .init = padlock_sha_init, | |
263 | .update = padlock_sha_update, | |
264 | .finup = padlock_sha256_finup, | |
265 | .final = padlock_sha256_final, | |
a8d7ac27 HX |
266 | .export = padlock_sha_export, |
267 | .import = padlock_sha_import, | |
bbbee467 | 268 | .descsize = sizeof(struct padlock_sha_desc), |
a8d7ac27 | 269 | .statesize = sizeof(struct sha256_state), |
bbbee467 HX |
270 | .base = { |
271 | .cra_name = "sha256", | |
272 | .cra_driver_name = "sha256-padlock", | |
273 | .cra_priority = PADLOCK_CRA_PRIORITY, | |
274 | .cra_flags = CRYPTO_ALG_TYPE_SHASH | | |
275 | CRYPTO_ALG_NEED_FALLBACK, | |
276 | .cra_blocksize = SHA256_BLOCK_SIZE, | |
277 | .cra_ctxsize = sizeof(struct padlock_sha_ctx), | |
278 | .cra_module = THIS_MODULE, | |
279 | .cra_init = padlock_cra_init, | |
280 | .cra_exit = padlock_cra_exit, | |
6c833275 ML |
281 | } |
282 | }; | |
283 | ||
0475add3 BW |
284 | /* Add two shash_alg instance for hardware-implemented * |
285 | * multiple-parts hash supported by VIA Nano Processor.*/ | |
286 | static int padlock_sha1_init_nano(struct shash_desc *desc) | |
287 | { | |
288 | struct sha1_state *sctx = shash_desc_ctx(desc); | |
289 | ||
290 | *sctx = (struct sha1_state){ | |
291 | .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 }, | |
292 | }; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static int padlock_sha1_update_nano(struct shash_desc *desc, | |
298 | const u8 *data, unsigned int len) | |
299 | { | |
300 | struct sha1_state *sctx = shash_desc_ctx(desc); | |
301 | unsigned int partial, done; | |
302 | const u8 *src; | |
303 | /*The PHE require the out buffer must 128 bytes and 16-bytes aligned*/ | |
304 | u8 buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__ | |
305 | ((aligned(STACK_ALIGN))); | |
306 | u8 *dst = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT); | |
0475add3 BW |
307 | |
308 | partial = sctx->count & 0x3f; | |
309 | sctx->count += len; | |
310 | done = 0; | |
311 | src = data; | |
312 | memcpy(dst, (u8 *)(sctx->state), SHA1_DIGEST_SIZE); | |
313 | ||
314 | if ((partial + len) >= SHA1_BLOCK_SIZE) { | |
315 | ||
316 | /* Append the bytes in state's buffer to a block to handle */ | |
317 | if (partial) { | |
318 | done = -partial; | |
319 | memcpy(sctx->buffer + partial, data, | |
320 | done + SHA1_BLOCK_SIZE); | |
321 | src = sctx->buffer; | |
0475add3 BW |
322 | asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" |
323 | : "+S"(src), "+D"(dst) \ | |
324 | : "a"((long)-1), "c"((unsigned long)1)); | |
0475add3 BW |
325 | done += SHA1_BLOCK_SIZE; |
326 | src = data + done; | |
327 | } | |
328 | ||
329 | /* Process the left bytes from the input data */ | |
330 | if (len - done >= SHA1_BLOCK_SIZE) { | |
0475add3 BW |
331 | asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" |
332 | : "+S"(src), "+D"(dst) | |
333 | : "a"((long)-1), | |
334 | "c"((unsigned long)((len - done) / SHA1_BLOCK_SIZE))); | |
0475add3 BW |
335 | done += ((len - done) - (len - done) % SHA1_BLOCK_SIZE); |
336 | src = data + done; | |
337 | } | |
338 | partial = 0; | |
339 | } | |
340 | memcpy((u8 *)(sctx->state), dst, SHA1_DIGEST_SIZE); | |
341 | memcpy(sctx->buffer + partial, src, len - done); | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | static int padlock_sha1_final_nano(struct shash_desc *desc, u8 *out) | |
347 | { | |
348 | struct sha1_state *state = (struct sha1_state *)shash_desc_ctx(desc); | |
349 | unsigned int partial, padlen; | |
350 | __be64 bits; | |
351 | static const u8 padding[64] = { 0x80, }; | |
352 | ||
353 | bits = cpu_to_be64(state->count << 3); | |
354 | ||
355 | /* Pad out to 56 mod 64 */ | |
356 | partial = state->count & 0x3f; | |
357 | padlen = (partial < 56) ? (56 - partial) : ((64+56) - partial); | |
358 | padlock_sha1_update_nano(desc, padding, padlen); | |
359 | ||
360 | /* Append length field bytes */ | |
361 | padlock_sha1_update_nano(desc, (const u8 *)&bits, sizeof(bits)); | |
362 | ||
363 | /* Swap to output */ | |
364 | padlock_output_block((uint32_t *)(state->state), (uint32_t *)out, 5); | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | static int padlock_sha256_init_nano(struct shash_desc *desc) | |
370 | { | |
371 | struct sha256_state *sctx = shash_desc_ctx(desc); | |
372 | ||
373 | *sctx = (struct sha256_state){ | |
374 | .state = { SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, \ | |
375 | SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7}, | |
376 | }; | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | static int padlock_sha256_update_nano(struct shash_desc *desc, const u8 *data, | |
382 | unsigned int len) | |
383 | { | |
384 | struct sha256_state *sctx = shash_desc_ctx(desc); | |
385 | unsigned int partial, done; | |
386 | const u8 *src; | |
387 | /*The PHE require the out buffer must 128 bytes and 16-bytes aligned*/ | |
388 | u8 buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__ | |
389 | ((aligned(STACK_ALIGN))); | |
390 | u8 *dst = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT); | |
0475add3 BW |
391 | |
392 | partial = sctx->count & 0x3f; | |
393 | sctx->count += len; | |
394 | done = 0; | |
395 | src = data; | |
396 | memcpy(dst, (u8 *)(sctx->state), SHA256_DIGEST_SIZE); | |
397 | ||
398 | if ((partial + len) >= SHA256_BLOCK_SIZE) { | |
399 | ||
400 | /* Append the bytes in state's buffer to a block to handle */ | |
401 | if (partial) { | |
402 | done = -partial; | |
403 | memcpy(sctx->buf + partial, data, | |
404 | done + SHA256_BLOCK_SIZE); | |
405 | src = sctx->buf; | |
0475add3 BW |
406 | asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" |
407 | : "+S"(src), "+D"(dst) | |
408 | : "a"((long)-1), "c"((unsigned long)1)); | |
0475add3 BW |
409 | done += SHA256_BLOCK_SIZE; |
410 | src = data + done; | |
411 | } | |
412 | ||
413 | /* Process the left bytes from input data*/ | |
414 | if (len - done >= SHA256_BLOCK_SIZE) { | |
0475add3 BW |
415 | asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" |
416 | : "+S"(src), "+D"(dst) | |
417 | : "a"((long)-1), | |
418 | "c"((unsigned long)((len - done) / 64))); | |
0475add3 BW |
419 | done += ((len - done) - (len - done) % 64); |
420 | src = data + done; | |
421 | } | |
422 | partial = 0; | |
423 | } | |
424 | memcpy((u8 *)(sctx->state), dst, SHA256_DIGEST_SIZE); | |
425 | memcpy(sctx->buf + partial, src, len - done); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | static int padlock_sha256_final_nano(struct shash_desc *desc, u8 *out) | |
431 | { | |
432 | struct sha256_state *state = | |
433 | (struct sha256_state *)shash_desc_ctx(desc); | |
434 | unsigned int partial, padlen; | |
435 | __be64 bits; | |
436 | static const u8 padding[64] = { 0x80, }; | |
437 | ||
438 | bits = cpu_to_be64(state->count << 3); | |
439 | ||
440 | /* Pad out to 56 mod 64 */ | |
441 | partial = state->count & 0x3f; | |
442 | padlen = (partial < 56) ? (56 - partial) : ((64+56) - partial); | |
443 | padlock_sha256_update_nano(desc, padding, padlen); | |
444 | ||
445 | /* Append length field bytes */ | |
446 | padlock_sha256_update_nano(desc, (const u8 *)&bits, sizeof(bits)); | |
447 | ||
448 | /* Swap to output */ | |
449 | padlock_output_block((uint32_t *)(state->state), (uint32_t *)out, 8); | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static int padlock_sha_export_nano(struct shash_desc *desc, | |
455 | void *out) | |
456 | { | |
457 | int statesize = crypto_shash_statesize(desc->tfm); | |
458 | void *sctx = shash_desc_ctx(desc); | |
459 | ||
460 | memcpy(out, sctx, statesize); | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static int padlock_sha_import_nano(struct shash_desc *desc, | |
465 | const void *in) | |
466 | { | |
467 | int statesize = crypto_shash_statesize(desc->tfm); | |
468 | void *sctx = shash_desc_ctx(desc); | |
469 | ||
470 | memcpy(sctx, in, statesize); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static struct shash_alg sha1_alg_nano = { | |
475 | .digestsize = SHA1_DIGEST_SIZE, | |
476 | .init = padlock_sha1_init_nano, | |
477 | .update = padlock_sha1_update_nano, | |
478 | .final = padlock_sha1_final_nano, | |
479 | .export = padlock_sha_export_nano, | |
480 | .import = padlock_sha_import_nano, | |
481 | .descsize = sizeof(struct sha1_state), | |
482 | .statesize = sizeof(struct sha1_state), | |
483 | .base = { | |
484 | .cra_name = "sha1", | |
485 | .cra_driver_name = "sha1-padlock-nano", | |
486 | .cra_priority = PADLOCK_CRA_PRIORITY, | |
487 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
488 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
489 | .cra_module = THIS_MODULE, | |
490 | } | |
491 | }; | |
492 | ||
493 | static struct shash_alg sha256_alg_nano = { | |
494 | .digestsize = SHA256_DIGEST_SIZE, | |
495 | .init = padlock_sha256_init_nano, | |
496 | .update = padlock_sha256_update_nano, | |
497 | .final = padlock_sha256_final_nano, | |
498 | .export = padlock_sha_export_nano, | |
499 | .import = padlock_sha_import_nano, | |
500 | .descsize = sizeof(struct sha256_state), | |
501 | .statesize = sizeof(struct sha256_state), | |
502 | .base = { | |
503 | .cra_name = "sha256", | |
504 | .cra_driver_name = "sha256-padlock-nano", | |
505 | .cra_priority = PADLOCK_CRA_PRIORITY, | |
506 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
507 | .cra_blocksize = SHA256_BLOCK_SIZE, | |
508 | .cra_module = THIS_MODULE, | |
509 | } | |
510 | }; | |
511 | ||
16d5cee5 | 512 | static const struct x86_cpu_id padlock_sha_ids[] = { |
3bd391f0 AK |
513 | X86_FEATURE_MATCH(X86_FEATURE_PHE), |
514 | {} | |
515 | }; | |
516 | MODULE_DEVICE_TABLE(x86cpu, padlock_sha_ids); | |
517 | ||
6c833275 ML |
518 | static int __init padlock_init(void) |
519 | { | |
520 | int rc = -ENODEV; | |
0475add3 BW |
521 | struct cpuinfo_x86 *c = &cpu_data(0); |
522 | struct shash_alg *sha1; | |
523 | struct shash_alg *sha256; | |
6c833275 | 524 | |
362f924b | 525 | if (!x86_match_cpu(padlock_sha_ids) || !boot_cpu_has(X86_FEATURE_PHE_EN)) |
6c833275 | 526 | return -ENODEV; |
6c833275 | 527 | |
0475add3 BW |
528 | /* Register the newly added algorithm module if on * |
529 | * VIA Nano processor, or else just do as before */ | |
530 | if (c->x86_model < 0x0f) { | |
531 | sha1 = &sha1_alg; | |
532 | sha256 = &sha256_alg; | |
533 | } else { | |
534 | sha1 = &sha1_alg_nano; | |
535 | sha256 = &sha256_alg_nano; | |
536 | } | |
537 | ||
538 | rc = crypto_register_shash(sha1); | |
6c833275 ML |
539 | if (rc) |
540 | goto out; | |
541 | ||
0475add3 | 542 | rc = crypto_register_shash(sha256); |
6c833275 ML |
543 | if (rc) |
544 | goto out_unreg1; | |
545 | ||
546 | printk(KERN_NOTICE PFX "Using VIA PadLock ACE for SHA1/SHA256 algorithms.\n"); | |
547 | ||
548 | return 0; | |
549 | ||
550 | out_unreg1: | |
0475add3 BW |
551 | crypto_unregister_shash(sha1); |
552 | ||
6c833275 ML |
553 | out: |
554 | printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n"); | |
555 | return rc; | |
556 | } | |
557 | ||
558 | static void __exit padlock_fini(void) | |
559 | { | |
0475add3 BW |
560 | struct cpuinfo_x86 *c = &cpu_data(0); |
561 | ||
562 | if (c->x86_model >= 0x0f) { | |
563 | crypto_unregister_shash(&sha1_alg_nano); | |
564 | crypto_unregister_shash(&sha256_alg_nano); | |
565 | } else { | |
566 | crypto_unregister_shash(&sha1_alg); | |
567 | crypto_unregister_shash(&sha256_alg); | |
568 | } | |
6c833275 ML |
569 | } |
570 | ||
571 | module_init(padlock_init); | |
572 | module_exit(padlock_fini); | |
573 | ||
574 | MODULE_DESCRIPTION("VIA PadLock SHA1/SHA256 algorithms support."); | |
575 | MODULE_LICENSE("GPL"); | |
576 | MODULE_AUTHOR("Michal Ludvig"); | |
577 | ||
5d26a105 KC |
578 | MODULE_ALIAS_CRYPTO("sha1-all"); |
579 | MODULE_ALIAS_CRYPTO("sha256-all"); | |
580 | MODULE_ALIAS_CRYPTO("sha1-padlock"); | |
581 | MODULE_ALIAS_CRYPTO("sha256-padlock"); |