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1 | /* | |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://opensource.org/licenses/CDDL-1.0. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Copyright 2013 Saso Kiselkov. All rights reserved. | |
24 | */ | |
25 | ||
26 | #include <sys/modctl.h> | |
27 | #include <sys/crypto/common.h> | |
28 | #include <sys/crypto/spi.h> | |
29 | #include <sys/sysmacros.h> | |
30 | #include <sys/systm.h> | |
31 | #define SKEIN_MODULE_IMPL | |
32 | #include <sys/skein.h> | |
33 | ||
34 | /* | |
35 | * Like the sha2 module, we create the skein module with two modlinkages: | |
36 | * - modlmisc to allow direct calls to Skein_* API functions. | |
37 | * - modlcrypto to integrate well into the Kernel Crypto Framework (KCF). | |
38 | */ | |
39 | static struct modlmisc modlmisc = { | |
40 | &mod_cryptoops, | |
41 | "Skein Message-Digest Algorithm" | |
42 | }; | |
43 | ||
44 | static struct modlcrypto modlcrypto = { | |
45 | &mod_cryptoops, | |
46 | "Skein Kernel SW Provider" | |
47 | }; | |
48 | ||
49 | static struct modlinkage modlinkage = { | |
50 | MODREV_1, {&modlmisc, &modlcrypto, NULL} | |
51 | }; | |
52 | ||
53 | static crypto_mech_info_t skein_mech_info_tab[] = { | |
54 | {CKM_SKEIN_256, SKEIN_256_MECH_INFO_TYPE, | |
55 | CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC, | |
56 | 0, 0, CRYPTO_KEYSIZE_UNIT_IN_BITS}, | |
57 | {CKM_SKEIN_256_MAC, SKEIN_256_MAC_MECH_INFO_TYPE, | |
58 | CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC, 1, INT_MAX, | |
59 | CRYPTO_KEYSIZE_UNIT_IN_BYTES}, | |
60 | {CKM_SKEIN_512, SKEIN_512_MECH_INFO_TYPE, | |
61 | CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC, | |
62 | 0, 0, CRYPTO_KEYSIZE_UNIT_IN_BITS}, | |
63 | {CKM_SKEIN_512_MAC, SKEIN_512_MAC_MECH_INFO_TYPE, | |
64 | CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC, 1, INT_MAX, | |
65 | CRYPTO_KEYSIZE_UNIT_IN_BYTES}, | |
66 | {CKM_SKEIN1024, SKEIN1024_MECH_INFO_TYPE, | |
67 | CRYPTO_FG_DIGEST | CRYPTO_FG_DIGEST_ATOMIC, | |
68 | 0, 0, CRYPTO_KEYSIZE_UNIT_IN_BITS}, | |
69 | {CKM_SKEIN1024_MAC, SKEIN1024_MAC_MECH_INFO_TYPE, | |
70 | CRYPTO_FG_MAC | CRYPTO_FG_MAC_ATOMIC, 1, INT_MAX, | |
71 | CRYPTO_KEYSIZE_UNIT_IN_BYTES} | |
72 | }; | |
73 | ||
74 | static void skein_provider_status(crypto_provider_handle_t, uint_t *); | |
75 | ||
76 | static crypto_control_ops_t skein_control_ops = { | |
77 | skein_provider_status | |
78 | }; | |
79 | ||
80 | static int skein_digest_init(crypto_ctx_t *, crypto_mechanism_t *, | |
81 | crypto_req_handle_t); | |
82 | static int skein_digest(crypto_ctx_t *, crypto_data_t *, crypto_data_t *, | |
83 | crypto_req_handle_t); | |
84 | static int skein_update(crypto_ctx_t *, crypto_data_t *, crypto_req_handle_t); | |
85 | static int skein_final(crypto_ctx_t *, crypto_data_t *, crypto_req_handle_t); | |
86 | static int skein_digest_atomic(crypto_provider_handle_t, crypto_session_id_t, | |
87 | crypto_mechanism_t *, crypto_data_t *, crypto_data_t *, | |
88 | crypto_req_handle_t); | |
89 | ||
90 | static crypto_digest_ops_t skein_digest_ops = { | |
91 | .digest_init = skein_digest_init, | |
92 | .digest = skein_digest, | |
93 | .digest_update = skein_update, | |
94 | .digest_key = NULL, | |
95 | .digest_final = skein_final, | |
96 | .digest_atomic = skein_digest_atomic | |
97 | }; | |
98 | ||
99 | static int skein_mac_init(crypto_ctx_t *, crypto_mechanism_t *, crypto_key_t *, | |
100 | crypto_spi_ctx_template_t, crypto_req_handle_t); | |
101 | static int skein_mac_atomic(crypto_provider_handle_t, crypto_session_id_t, | |
102 | crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, crypto_data_t *, | |
103 | crypto_spi_ctx_template_t, crypto_req_handle_t); | |
104 | ||
105 | static crypto_mac_ops_t skein_mac_ops = { | |
106 | .mac_init = skein_mac_init, | |
107 | .mac = NULL, | |
108 | .mac_update = skein_update, /* using regular digest update is OK here */ | |
109 | .mac_final = skein_final, /* using regular digest final is OK here */ | |
110 | .mac_atomic = skein_mac_atomic, | |
111 | .mac_verify_atomic = NULL | |
112 | }; | |
113 | ||
114 | static int skein_create_ctx_template(crypto_provider_handle_t, | |
115 | crypto_mechanism_t *, crypto_key_t *, crypto_spi_ctx_template_t *, | |
116 | size_t *, crypto_req_handle_t); | |
117 | static int skein_free_context(crypto_ctx_t *); | |
118 | ||
119 | static crypto_ctx_ops_t skein_ctx_ops = { | |
120 | .create_ctx_template = skein_create_ctx_template, | |
121 | .free_context = skein_free_context | |
122 | }; | |
123 | ||
124 | static crypto_ops_t skein_crypto_ops = {{{{{ | |
125 | &skein_control_ops, | |
126 | &skein_digest_ops, | |
127 | NULL, | |
128 | &skein_mac_ops, | |
129 | NULL, | |
130 | NULL, | |
131 | NULL, | |
132 | NULL, | |
133 | NULL, | |
134 | NULL, | |
135 | NULL, | |
136 | NULL, | |
137 | NULL, | |
138 | &skein_ctx_ops, | |
139 | }}}}}; | |
140 | ||
141 | static crypto_provider_info_t skein_prov_info = {{{{ | |
142 | CRYPTO_SPI_VERSION_1, | |
143 | "Skein Software Provider", | |
144 | CRYPTO_SW_PROVIDER, | |
145 | NULL, | |
146 | &skein_crypto_ops, | |
147 | sizeof (skein_mech_info_tab) / sizeof (crypto_mech_info_t), | |
148 | skein_mech_info_tab | |
149 | }}}}; | |
150 | ||
151 | static crypto_kcf_provider_handle_t skein_prov_handle = 0; | |
152 | ||
153 | typedef struct skein_ctx { | |
154 | skein_mech_type_t sc_mech_type; | |
155 | size_t sc_digest_bitlen; | |
156 | /*LINTED(E_ANONYMOUS_UNION_DECL)*/ | |
157 | union { | |
158 | Skein_256_Ctxt_t sc_256; | |
159 | Skein_512_Ctxt_t sc_512; | |
160 | Skein1024_Ctxt_t sc_1024; | |
161 | }; | |
162 | } skein_ctx_t; | |
163 | #define SKEIN_CTX(_ctx_) ((skein_ctx_t *)((_ctx_)->cc_provider_private)) | |
164 | #define SKEIN_CTX_LVALUE(_ctx_) (_ctx_)->cc_provider_private | |
165 | #define SKEIN_OP(_skein_ctx, _op, ...) \ | |
166 | do { \ | |
167 | skein_ctx_t *sc = (_skein_ctx); \ | |
168 | switch (sc->sc_mech_type) { \ | |
169 | case SKEIN_256_MECH_INFO_TYPE: \ | |
170 | case SKEIN_256_MAC_MECH_INFO_TYPE: \ | |
171 | (void) Skein_256_ ## _op(&sc->sc_256, __VA_ARGS__);\ | |
172 | break; \ | |
173 | case SKEIN_512_MECH_INFO_TYPE: \ | |
174 | case SKEIN_512_MAC_MECH_INFO_TYPE: \ | |
175 | (void) Skein_512_ ## _op(&sc->sc_512, __VA_ARGS__);\ | |
176 | break; \ | |
177 | case SKEIN1024_MECH_INFO_TYPE: \ | |
178 | case SKEIN1024_MAC_MECH_INFO_TYPE: \ | |
179 | (void) Skein1024_ ## _op(&sc->sc_1024, __VA_ARGS__);\ | |
180 | break; \ | |
181 | } \ | |
182 | _NOTE(CONSTCOND) \ | |
183 | } while (0) | |
184 | ||
185 | static int | |
186 | skein_get_digest_bitlen(const crypto_mechanism_t *mechanism, size_t *result) | |
187 | { | |
188 | if (mechanism->cm_param != NULL) { | |
189 | /*LINTED(E_BAD_PTR_CAST_ALIGN)*/ | |
190 | skein_param_t *param = (skein_param_t *)mechanism->cm_param; | |
191 | ||
192 | if (mechanism->cm_param_len != sizeof (*param) || | |
193 | param->sp_digest_bitlen == 0) { | |
194 | return (CRYPTO_MECHANISM_PARAM_INVALID); | |
195 | } | |
196 | *result = param->sp_digest_bitlen; | |
197 | } else { | |
198 | switch (mechanism->cm_type) { | |
199 | case SKEIN_256_MECH_INFO_TYPE: | |
200 | *result = 256; | |
201 | break; | |
202 | case SKEIN_512_MECH_INFO_TYPE: | |
203 | *result = 512; | |
204 | break; | |
205 | case SKEIN1024_MECH_INFO_TYPE: | |
206 | *result = 1024; | |
207 | break; | |
208 | default: | |
209 | return (CRYPTO_MECHANISM_INVALID); | |
210 | } | |
211 | } | |
212 | return (CRYPTO_SUCCESS); | |
213 | } | |
214 | ||
215 | int | |
216 | skein_mod_init(void) | |
217 | { | |
218 | int error; | |
219 | ||
220 | if ((error = mod_install(&modlinkage)) != 0) | |
221 | return (error); | |
222 | ||
223 | /* | |
224 | * Try to register with KCF - failure shouldn't unload us, since we | |
225 | * still may want to continue providing misc/skein functionality. | |
226 | */ | |
227 | (void) crypto_register_provider(&skein_prov_info, &skein_prov_handle); | |
228 | ||
229 | return (0); | |
230 | } | |
231 | ||
232 | int | |
233 | skein_mod_fini(void) | |
234 | { | |
235 | int ret; | |
236 | ||
237 | if (skein_prov_handle != 0) { | |
238 | if ((ret = crypto_unregister_provider(skein_prov_handle)) != | |
239 | CRYPTO_SUCCESS) { | |
240 | cmn_err(CE_WARN, | |
241 | "skein _fini: crypto_unregister_provider() " | |
242 | "failed (0x%x)", ret); | |
243 | return (EBUSY); | |
244 | } | |
245 | skein_prov_handle = 0; | |
246 | } | |
247 | ||
248 | return (mod_remove(&modlinkage)); | |
249 | } | |
250 | ||
251 | /* | |
252 | * KCF software provider control entry points. | |
253 | */ | |
254 | /* ARGSUSED */ | |
255 | static void | |
256 | skein_provider_status(crypto_provider_handle_t provider, uint_t *status) | |
257 | { | |
258 | *status = CRYPTO_PROVIDER_READY; | |
259 | } | |
260 | ||
261 | /* | |
262 | * General Skein hashing helper functions. | |
263 | */ | |
264 | ||
265 | /* | |
266 | * Performs an Update on a context with uio input data. | |
267 | */ | |
268 | static int | |
269 | skein_digest_update_uio(skein_ctx_t *ctx, const crypto_data_t *data) | |
270 | { | |
271 | off_t offset = data->cd_offset; | |
272 | size_t length = data->cd_length; | |
273 | uint_t vec_idx; | |
274 | size_t cur_len; | |
275 | const uio_t *uio = data->cd_uio; | |
276 | ||
277 | /* we support only kernel buffer */ | |
278 | if (uio->uio_segflg != UIO_SYSSPACE) | |
279 | return (CRYPTO_ARGUMENTS_BAD); | |
280 | ||
281 | /* | |
282 | * Jump to the first iovec containing data to be | |
283 | * digested. | |
284 | */ | |
285 | for (vec_idx = 0; vec_idx < uio->uio_iovcnt && | |
286 | offset >= uio->uio_iov[vec_idx].iov_len; | |
287 | offset -= uio->uio_iov[vec_idx++].iov_len) | |
288 | ; | |
289 | if (vec_idx == uio->uio_iovcnt) { | |
290 | /* | |
291 | * The caller specified an offset that is larger than the | |
292 | * total size of the buffers it provided. | |
293 | */ | |
294 | return (CRYPTO_DATA_LEN_RANGE); | |
295 | } | |
296 | ||
297 | /* | |
298 | * Now do the digesting on the iovecs. | |
299 | */ | |
300 | while (vec_idx < uio->uio_iovcnt && length > 0) { | |
301 | cur_len = MIN(uio->uio_iov[vec_idx].iov_len - offset, length); | |
302 | SKEIN_OP(ctx, Update, (uint8_t *)uio->uio_iov[vec_idx].iov_base | |
303 | + offset, cur_len); | |
304 | length -= cur_len; | |
305 | vec_idx++; | |
306 | offset = 0; | |
307 | } | |
308 | ||
309 | if (vec_idx == uio->uio_iovcnt && length > 0) { | |
310 | /* | |
311 | * The end of the specified iovec's was reached but | |
312 | * the length requested could not be processed, i.e. | |
313 | * The caller requested to digest more data than it provided. | |
314 | */ | |
315 | return (CRYPTO_DATA_LEN_RANGE); | |
316 | } | |
317 | ||
318 | return (CRYPTO_SUCCESS); | |
319 | } | |
320 | ||
321 | /* | |
322 | * Performs a Final on a context and writes to a uio digest output. | |
323 | */ | |
324 | static int | |
325 | skein_digest_final_uio(skein_ctx_t *ctx, crypto_data_t *digest, | |
326 | crypto_req_handle_t req) | |
327 | { | |
328 | off_t offset = digest->cd_offset; | |
329 | uint_t vec_idx; | |
330 | uio_t *uio = digest->cd_uio; | |
331 | ||
332 | /* we support only kernel buffer */ | |
333 | if (uio->uio_segflg != UIO_SYSSPACE) | |
334 | return (CRYPTO_ARGUMENTS_BAD); | |
335 | ||
336 | /* | |
337 | * Jump to the first iovec containing ptr to the digest to be returned. | |
338 | */ | |
339 | for (vec_idx = 0; offset >= uio->uio_iov[vec_idx].iov_len && | |
340 | vec_idx < uio->uio_iovcnt; | |
341 | offset -= uio->uio_iov[vec_idx++].iov_len) | |
342 | ; | |
343 | if (vec_idx == uio->uio_iovcnt) { | |
344 | /* | |
345 | * The caller specified an offset that is larger than the | |
346 | * total size of the buffers it provided. | |
347 | */ | |
348 | return (CRYPTO_DATA_LEN_RANGE); | |
349 | } | |
350 | if (offset + CRYPTO_BITS2BYTES(ctx->sc_digest_bitlen) <= | |
351 | uio->uio_iov[vec_idx].iov_len) { | |
352 | /* The computed digest will fit in the current iovec. */ | |
353 | SKEIN_OP(ctx, Final, | |
354 | (uchar_t *)uio->uio_iov[vec_idx].iov_base + offset); | |
355 | } else { | |
356 | uint8_t *digest_tmp; | |
357 | off_t scratch_offset = 0; | |
358 | size_t length = CRYPTO_BITS2BYTES(ctx->sc_digest_bitlen); | |
359 | size_t cur_len; | |
360 | ||
361 | digest_tmp = kmem_alloc(CRYPTO_BITS2BYTES( | |
362 | ctx->sc_digest_bitlen), crypto_kmflag(req)); | |
363 | if (digest_tmp == NULL) | |
364 | return (CRYPTO_HOST_MEMORY); | |
365 | SKEIN_OP(ctx, Final, digest_tmp); | |
366 | while (vec_idx < uio->uio_iovcnt && length > 0) { | |
367 | cur_len = MIN(uio->uio_iov[vec_idx].iov_len - offset, | |
368 | length); | |
369 | bcopy(digest_tmp + scratch_offset, | |
370 | uio->uio_iov[vec_idx].iov_base + offset, cur_len); | |
371 | ||
372 | length -= cur_len; | |
373 | vec_idx++; | |
374 | scratch_offset += cur_len; | |
375 | offset = 0; | |
376 | } | |
377 | kmem_free(digest_tmp, CRYPTO_BITS2BYTES(ctx->sc_digest_bitlen)); | |
378 | ||
379 | if (vec_idx == uio->uio_iovcnt && length > 0) { | |
380 | /* | |
381 | * The end of the specified iovec's was reached but | |
382 | * the length requested could not be processed, i.e. | |
383 | * The caller requested to digest more data than it | |
384 | * provided. | |
385 | */ | |
386 | return (CRYPTO_DATA_LEN_RANGE); | |
387 | } | |
388 | } | |
389 | ||
390 | return (CRYPTO_SUCCESS); | |
391 | } | |
392 | ||
393 | /* | |
394 | * KCF software provider digest entry points. | |
395 | */ | |
396 | ||
397 | /* | |
398 | * Initializes a skein digest context to the configuration in `mechanism'. | |
399 | * The mechanism cm_type must be one of SKEIN_*_MECH_INFO_TYPE. The cm_param | |
400 | * field may contain a skein_param_t structure indicating the length of the | |
401 | * digest the algorithm should produce. Otherwise the default output lengths | |
402 | * are applied (32 bytes for Skein-256, 64 bytes for Skein-512 and 128 bytes | |
403 | * for Skein-1024). | |
404 | */ | |
405 | static int | |
406 | skein_digest_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism, | |
407 | crypto_req_handle_t req) | |
408 | { | |
409 | int error = CRYPTO_SUCCESS; | |
410 | ||
411 | if (!VALID_SKEIN_DIGEST_MECH(mechanism->cm_type)) | |
412 | return (CRYPTO_MECHANISM_INVALID); | |
413 | ||
414 | SKEIN_CTX_LVALUE(ctx) = kmem_alloc(sizeof (*SKEIN_CTX(ctx)), | |
415 | crypto_kmflag(req)); | |
416 | if (SKEIN_CTX(ctx) == NULL) | |
417 | return (CRYPTO_HOST_MEMORY); | |
418 | ||
419 | SKEIN_CTX(ctx)->sc_mech_type = mechanism->cm_type; | |
420 | error = skein_get_digest_bitlen(mechanism, | |
421 | &SKEIN_CTX(ctx)->sc_digest_bitlen); | |
422 | if (error != CRYPTO_SUCCESS) | |
423 | goto errout; | |
424 | SKEIN_OP(SKEIN_CTX(ctx), Init, SKEIN_CTX(ctx)->sc_digest_bitlen); | |
425 | ||
426 | return (CRYPTO_SUCCESS); | |
427 | errout: | |
428 | bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
429 | kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
430 | SKEIN_CTX_LVALUE(ctx) = NULL; | |
431 | return (error); | |
432 | } | |
433 | ||
434 | /* | |
435 | * Executes a skein_update and skein_digest on a pre-initialized crypto | |
436 | * context in a single step. See the documentation to these functions to | |
437 | * see what to pass here. | |
438 | */ | |
439 | static int | |
440 | skein_digest(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *digest, | |
441 | crypto_req_handle_t req) | |
442 | { | |
443 | int error = CRYPTO_SUCCESS; | |
444 | ||
445 | ASSERT(SKEIN_CTX(ctx) != NULL); | |
446 | ||
447 | if (digest->cd_length < | |
448 | CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen)) { | |
449 | digest->cd_length = | |
450 | CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen); | |
451 | return (CRYPTO_BUFFER_TOO_SMALL); | |
452 | } | |
453 | ||
454 | error = skein_update(ctx, data, req); | |
455 | if (error != CRYPTO_SUCCESS) { | |
456 | bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
457 | kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
458 | SKEIN_CTX_LVALUE(ctx) = NULL; | |
459 | digest->cd_length = 0; | |
460 | return (error); | |
461 | } | |
462 | error = skein_final(ctx, digest, req); | |
463 | ||
464 | return (error); | |
465 | } | |
466 | ||
467 | /* | |
468 | * Performs a skein Update with the input message in `data' (successive calls | |
469 | * can push more data). This is used both for digest and MAC operation. | |
470 | * Supported input data formats are raw, uio and mblk. | |
471 | */ | |
472 | /*ARGSUSED*/ | |
473 | static int | |
474 | skein_update(crypto_ctx_t *ctx, crypto_data_t *data, crypto_req_handle_t req) | |
475 | { | |
476 | int error = CRYPTO_SUCCESS; | |
477 | ||
478 | ASSERT(SKEIN_CTX(ctx) != NULL); | |
479 | ||
480 | switch (data->cd_format) { | |
481 | case CRYPTO_DATA_RAW: | |
482 | SKEIN_OP(SKEIN_CTX(ctx), Update, | |
483 | (uint8_t *)data->cd_raw.iov_base + data->cd_offset, | |
484 | data->cd_length); | |
485 | break; | |
486 | case CRYPTO_DATA_UIO: | |
487 | error = skein_digest_update_uio(SKEIN_CTX(ctx), data); | |
488 | break; | |
489 | default: | |
490 | error = CRYPTO_ARGUMENTS_BAD; | |
491 | } | |
492 | ||
493 | return (error); | |
494 | } | |
495 | ||
496 | /* | |
497 | * Performs a skein Final, writing the output to `digest'. This is used both | |
498 | * for digest and MAC operation. | |
499 | * Supported output digest formats are raw, uio and mblk. | |
500 | */ | |
501 | /*ARGSUSED*/ | |
502 | static int | |
503 | skein_final(crypto_ctx_t *ctx, crypto_data_t *digest, crypto_req_handle_t req) | |
504 | { | |
505 | int error = CRYPTO_SUCCESS; | |
506 | ||
507 | ASSERT(SKEIN_CTX(ctx) != NULL); | |
508 | ||
509 | if (digest->cd_length < | |
510 | CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen)) { | |
511 | digest->cd_length = | |
512 | CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen); | |
513 | return (CRYPTO_BUFFER_TOO_SMALL); | |
514 | } | |
515 | ||
516 | switch (digest->cd_format) { | |
517 | case CRYPTO_DATA_RAW: | |
518 | SKEIN_OP(SKEIN_CTX(ctx), Final, | |
519 | (uint8_t *)digest->cd_raw.iov_base + digest->cd_offset); | |
520 | break; | |
521 | case CRYPTO_DATA_UIO: | |
522 | error = skein_digest_final_uio(SKEIN_CTX(ctx), digest, req); | |
523 | break; | |
524 | default: | |
525 | error = CRYPTO_ARGUMENTS_BAD; | |
526 | } | |
527 | ||
528 | if (error == CRYPTO_SUCCESS) | |
529 | digest->cd_length = | |
530 | CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen); | |
531 | else | |
532 | digest->cd_length = 0; | |
533 | ||
534 | bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
535 | kmem_free(SKEIN_CTX(ctx), sizeof (*(SKEIN_CTX(ctx)))); | |
536 | SKEIN_CTX_LVALUE(ctx) = NULL; | |
537 | ||
538 | return (error); | |
539 | } | |
540 | ||
541 | /* | |
542 | * Performs a full skein digest computation in a single call, configuring the | |
543 | * algorithm according to `mechanism', reading the input to be digested from | |
544 | * `data' and writing the output to `digest'. | |
545 | * Supported input/output formats are raw, uio and mblk. | |
546 | */ | |
547 | /*ARGSUSED*/ | |
548 | static int | |
549 | skein_digest_atomic(crypto_provider_handle_t provider, | |
550 | crypto_session_id_t session_id, crypto_mechanism_t *mechanism, | |
551 | crypto_data_t *data, crypto_data_t *digest, crypto_req_handle_t req) | |
552 | { | |
553 | int error; | |
554 | skein_ctx_t skein_ctx; | |
555 | crypto_ctx_t ctx; | |
556 | SKEIN_CTX_LVALUE(&ctx) = &skein_ctx; | |
557 | ||
558 | /* Init */ | |
559 | if (!VALID_SKEIN_DIGEST_MECH(mechanism->cm_type)) | |
560 | return (CRYPTO_MECHANISM_INVALID); | |
561 | skein_ctx.sc_mech_type = mechanism->cm_type; | |
562 | error = skein_get_digest_bitlen(mechanism, &skein_ctx.sc_digest_bitlen); | |
563 | if (error != CRYPTO_SUCCESS) | |
564 | goto out; | |
565 | SKEIN_OP(&skein_ctx, Init, skein_ctx.sc_digest_bitlen); | |
566 | ||
567 | if ((error = skein_update(&ctx, data, digest)) != CRYPTO_SUCCESS) | |
568 | goto out; | |
569 | if ((error = skein_final(&ctx, data, digest)) != CRYPTO_SUCCESS) | |
570 | goto out; | |
571 | ||
572 | out: | |
573 | if (error == CRYPTO_SUCCESS) | |
574 | digest->cd_length = | |
575 | CRYPTO_BITS2BYTES(skein_ctx.sc_digest_bitlen); | |
576 | else | |
577 | digest->cd_length = 0; | |
578 | bzero(&skein_ctx, sizeof (skein_ctx)); | |
579 | ||
580 | return (error); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Helper function that builds a Skein MAC context from the provided | |
585 | * mechanism and key. | |
586 | */ | |
587 | static int | |
588 | skein_mac_ctx_build(skein_ctx_t *ctx, crypto_mechanism_t *mechanism, | |
589 | crypto_key_t *key) | |
590 | { | |
591 | int error; | |
592 | ||
593 | if (!VALID_SKEIN_MAC_MECH(mechanism->cm_type)) | |
594 | return (CRYPTO_MECHANISM_INVALID); | |
595 | if (key->ck_format != CRYPTO_KEY_RAW) | |
596 | return (CRYPTO_ARGUMENTS_BAD); | |
597 | ctx->sc_mech_type = mechanism->cm_type; | |
598 | error = skein_get_digest_bitlen(mechanism, &ctx->sc_digest_bitlen); | |
599 | if (error != CRYPTO_SUCCESS) | |
600 | return (error); | |
601 | SKEIN_OP(ctx, InitExt, ctx->sc_digest_bitlen, 0, key->ck_data, | |
602 | CRYPTO_BITS2BYTES(key->ck_length)); | |
603 | ||
604 | return (CRYPTO_SUCCESS); | |
605 | } | |
606 | ||
607 | /* | |
608 | * KCF software provide mac entry points. | |
609 | */ | |
610 | /* | |
611 | * Initializes a skein MAC context. You may pass a ctx_template, in which | |
612 | * case the template will be reused to make initialization more efficient. | |
613 | * Otherwise a new context will be constructed. The mechanism cm_type must | |
614 | * be one of SKEIN_*_MAC_MECH_INFO_TYPE. Same as in skein_digest_init, you | |
615 | * may pass a skein_param_t in cm_param to configure the length of the | |
616 | * digest. The key must be in raw format. | |
617 | */ | |
618 | static int | |
619 | skein_mac_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism, | |
620 | crypto_key_t *key, crypto_spi_ctx_template_t ctx_template, | |
621 | crypto_req_handle_t req) | |
622 | { | |
623 | int error; | |
624 | ||
625 | SKEIN_CTX_LVALUE(ctx) = kmem_alloc(sizeof (*SKEIN_CTX(ctx)), | |
626 | crypto_kmflag(req)); | |
627 | if (SKEIN_CTX(ctx) == NULL) | |
628 | return (CRYPTO_HOST_MEMORY); | |
629 | ||
630 | if (ctx_template != NULL) { | |
631 | bcopy(ctx_template, SKEIN_CTX(ctx), | |
632 | sizeof (*SKEIN_CTX(ctx))); | |
633 | } else { | |
634 | error = skein_mac_ctx_build(SKEIN_CTX(ctx), mechanism, key); | |
635 | if (error != CRYPTO_SUCCESS) | |
636 | goto errout; | |
637 | } | |
638 | ||
639 | return (CRYPTO_SUCCESS); | |
640 | errout: | |
641 | bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
642 | kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
643 | return (error); | |
644 | } | |
645 | ||
646 | /* | |
647 | * The MAC update and final calls are reused from the regular digest code. | |
648 | */ | |
649 | ||
650 | /*ARGSUSED*/ | |
651 | /* | |
652 | * Same as skein_digest_atomic, performs an atomic Skein MAC operation in | |
653 | * one step. All the same properties apply to the arguments of this | |
654 | * function as to those of the partial operations above. | |
655 | */ | |
656 | static int | |
657 | skein_mac_atomic(crypto_provider_handle_t provider, | |
658 | crypto_session_id_t session_id, crypto_mechanism_t *mechanism, | |
659 | crypto_key_t *key, crypto_data_t *data, crypto_data_t *mac, | |
660 | crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req) | |
661 | { | |
662 | /* faux crypto context just for skein_digest_{update,final} */ | |
663 | int error; | |
664 | crypto_ctx_t ctx; | |
665 | skein_ctx_t skein_ctx; | |
666 | SKEIN_CTX_LVALUE(&ctx) = &skein_ctx; | |
667 | ||
668 | if (ctx_template != NULL) { | |
669 | bcopy(ctx_template, &skein_ctx, sizeof (skein_ctx)); | |
670 | } else { | |
671 | error = skein_mac_ctx_build(&skein_ctx, mechanism, key); | |
672 | if (error != CRYPTO_SUCCESS) | |
673 | goto errout; | |
674 | } | |
675 | ||
676 | if ((error = skein_update(&ctx, data, req)) != CRYPTO_SUCCESS) | |
677 | goto errout; | |
678 | if ((error = skein_final(&ctx, mac, req)) != CRYPTO_SUCCESS) | |
679 | goto errout; | |
680 | ||
681 | return (CRYPTO_SUCCESS); | |
682 | errout: | |
683 | bzero(&skein_ctx, sizeof (skein_ctx)); | |
684 | return (error); | |
685 | } | |
686 | ||
687 | /* | |
688 | * KCF software provider context management entry points. | |
689 | */ | |
690 | ||
691 | /* | |
692 | * Constructs a context template for the Skein MAC algorithm. The same | |
693 | * properties apply to the arguments of this function as to those of | |
694 | * skein_mac_init. | |
695 | */ | |
696 | /*ARGSUSED*/ | |
697 | static int | |
698 | skein_create_ctx_template(crypto_provider_handle_t provider, | |
699 | crypto_mechanism_t *mechanism, crypto_key_t *key, | |
700 | crypto_spi_ctx_template_t *ctx_template, size_t *ctx_template_size, | |
701 | crypto_req_handle_t req) | |
702 | { | |
703 | int error; | |
704 | skein_ctx_t *ctx_tmpl; | |
705 | ||
706 | ctx_tmpl = kmem_alloc(sizeof (*ctx_tmpl), crypto_kmflag(req)); | |
707 | if (ctx_tmpl == NULL) | |
708 | return (CRYPTO_HOST_MEMORY); | |
709 | error = skein_mac_ctx_build(ctx_tmpl, mechanism, key); | |
710 | if (error != CRYPTO_SUCCESS) | |
711 | goto errout; | |
712 | *ctx_template = ctx_tmpl; | |
713 | *ctx_template_size = sizeof (*ctx_tmpl); | |
714 | ||
715 | return (CRYPTO_SUCCESS); | |
716 | errout: | |
717 | bzero(ctx_tmpl, sizeof (*ctx_tmpl)); | |
718 | kmem_free(ctx_tmpl, sizeof (*ctx_tmpl)); | |
719 | return (error); | |
720 | } | |
721 | ||
722 | /* | |
723 | * Frees a skein context in a parent crypto context. | |
724 | */ | |
725 | static int | |
726 | skein_free_context(crypto_ctx_t *ctx) | |
727 | { | |
728 | if (SKEIN_CTX(ctx) != NULL) { | |
729 | bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
730 | kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx))); | |
731 | SKEIN_CTX_LVALUE(ctx) = NULL; | |
732 | } | |
733 | ||
734 | return (CRYPTO_SUCCESS); | |
735 | } |