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.
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.
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]
23 * Copyright 2013 Saso Kiselkov. All rights reserved.
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>
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).
39 static struct modlmisc modlmisc = {
41 "Skein Message-Digest Algorithm"
44 static struct modlcrypto modlcrypto = {
46 "Skein Kernel SW Provider"
49 static struct modlinkage modlinkage = {
50 MODREV_1, {&modlmisc, &modlcrypto, NULL}
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}
74 static void skein_provider_status(crypto_provider_handle_t, uint_t *);
76 static crypto_control_ops_t skein_control_ops = {
80 static int skein_digest_init(crypto_ctx_t *, crypto_mechanism_t *,
82 static int skein_digest(crypto_ctx_t *, crypto_data_t *, crypto_data_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 *,
90 static crypto_digest_ops_t skein_digest_ops = {
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);
105 static crypto_mac_ops_t skein_mac_ops = {
108 skein_update, /* using regular digest update is OK here */
109 skein_final, /* using regular digest final is OK here */
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 *);
119 static crypto_ctx_ops_t skein_ctx_ops = {
120 skein_create_ctx_template,
124 static crypto_ops_t skein_crypto_ops = {{{{{
141 static crypto_provider_info_t skein_prov_info = {{{{
142 CRYPTO_SPI_VERSION_1,
143 "Skein Software Provider",
147 sizeof (skein_mech_info_tab) / sizeof (crypto_mech_info_t),
151 static crypto_kcf_provider_handle_t skein_prov_handle = 0;
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)*/
158 Skein_256_Ctxt_t sc_256;
159 Skein_512_Ctxt_t sc_512;
160 Skein1024_Ctxt_t sc_1024;
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, ...) \
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__);\
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__);\
177 case SKEIN1024_MECH_INFO_TYPE: \
178 case SKEIN1024_MAC_MECH_INFO_TYPE: \
179 (void) Skein1024_ ## _op(&sc->sc_1024, __VA_ARGS__);\
186 skein_get_digest_bitlen(const crypto_mechanism_t *mechanism, size_t *result)
188 if (mechanism->cm_param != NULL) {
189 /*LINTED(E_BAD_PTR_CAST_ALIGN)*/
190 skein_param_t *param = (skein_param_t *)mechanism->cm_param;
192 if (mechanism->cm_param_len != sizeof (*param) ||
193 param->sp_digest_bitlen == 0) {
194 return (CRYPTO_MECHANISM_PARAM_INVALID);
196 *result = param->sp_digest_bitlen;
198 switch (mechanism->cm_type) {
199 case SKEIN_256_MECH_INFO_TYPE:
202 case SKEIN_512_MECH_INFO_TYPE:
205 case SKEIN1024_MECH_INFO_TYPE:
209 return (CRYPTO_MECHANISM_INVALID);
212 return (CRYPTO_SUCCESS);
220 if ((error = mod_install(&modlinkage)) != 0)
224 * Try to register with KCF - failure shouldn't unload us, since we
225 * still may want to continue providing misc/skein functionality.
227 (void) crypto_register_provider(&skein_prov_info, &skein_prov_handle);
237 if (skein_prov_handle != 0) {
238 if ((ret = crypto_unregister_provider(skein_prov_handle)) !=
241 "skein _fini: crypto_unregister_provider() "
242 "failed (0x%x)", ret);
245 skein_prov_handle = 0;
248 return (mod_remove(&modlinkage));
252 * KCF software provider control entry points.
256 skein_provider_status(crypto_provider_handle_t provider, uint_t *status)
258 *status = CRYPTO_PROVIDER_READY;
262 * General Skein hashing helper functions.
266 * Performs an Update on a context with uio input data.
269 skein_digest_update_uio(skein_ctx_t *ctx, const crypto_data_t *data)
271 off_t offset = data->cd_offset;
272 size_t length = data->cd_length;
275 const uio_t *uio = data->cd_uio;
277 /* we support only kernel buffer */
278 if (uio->uio_segflg != UIO_SYSSPACE)
279 return (CRYPTO_ARGUMENTS_BAD);
282 * Jump to the first iovec containing data to be
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)
289 if (vec_idx == uio->uio_iovcnt) {
291 * The caller specified an offset that is larger than the
292 * total size of the buffers it provided.
294 return (CRYPTO_DATA_LEN_RANGE);
298 * Now do the digesting on the iovecs.
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
309 if (vec_idx == uio->uio_iovcnt && length > 0) {
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.
315 return (CRYPTO_DATA_LEN_RANGE);
318 return (CRYPTO_SUCCESS);
322 * Performs a Final on a context and writes to a uio digest output.
325 skein_digest_final_uio(skein_ctx_t *ctx, crypto_data_t *digest,
326 crypto_req_handle_t req)
328 off_t offset = digest->cd_offset;
330 uio_t *uio = digest->cd_uio;
332 /* we support only kernel buffer */
333 if (uio->uio_segflg != UIO_SYSSPACE)
334 return (CRYPTO_ARGUMENTS_BAD);
337 * Jump to the first iovec containing ptr to the digest to be returned.
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)
343 if (vec_idx == uio->uio_iovcnt) {
345 * The caller specified an offset that is larger than the
346 * total size of the buffers it provided.
348 return (CRYPTO_DATA_LEN_RANGE);
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. */
354 (uchar_t *)uio->uio_iov[vec_idx].iov_base + offset);
357 off_t scratch_offset = 0;
358 size_t length = CRYPTO_BITS2BYTES(ctx->sc_digest_bitlen);
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,
369 bcopy(digest_tmp + scratch_offset,
370 uio->uio_iov[vec_idx].iov_base + offset, cur_len);
374 scratch_offset += cur_len;
377 kmem_free(digest_tmp, CRYPTO_BITS2BYTES(ctx->sc_digest_bitlen));
379 if (vec_idx == uio->uio_iovcnt && length > 0) {
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
386 return (CRYPTO_DATA_LEN_RANGE);
390 return (CRYPTO_SUCCESS);
394 * KCF software provider digest entry points.
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
406 skein_digest_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism,
407 crypto_req_handle_t req)
409 int error = CRYPTO_SUCCESS;
411 if (!VALID_SKEIN_DIGEST_MECH(mechanism->cm_type))
412 return (CRYPTO_MECHANISM_INVALID);
414 SKEIN_CTX_LVALUE(ctx) = kmem_alloc(sizeof (*SKEIN_CTX(ctx)),
416 if (SKEIN_CTX(ctx) == NULL)
417 return (CRYPTO_HOST_MEMORY);
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)
424 SKEIN_OP(SKEIN_CTX(ctx), Init, SKEIN_CTX(ctx)->sc_digest_bitlen);
426 return (CRYPTO_SUCCESS);
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;
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.
440 skein_digest(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *digest,
441 crypto_req_handle_t req)
443 int error = CRYPTO_SUCCESS;
445 ASSERT(SKEIN_CTX(ctx) != NULL);
447 if (digest->cd_length <
448 CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen)) {
450 CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen);
451 return (CRYPTO_BUFFER_TOO_SMALL);
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;
462 error = skein_final(ctx, digest, req);
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.
474 skein_update(crypto_ctx_t *ctx, crypto_data_t *data, crypto_req_handle_t req)
476 int error = CRYPTO_SUCCESS;
478 ASSERT(SKEIN_CTX(ctx) != NULL);
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,
486 case CRYPTO_DATA_UIO:
487 error = skein_digest_update_uio(SKEIN_CTX(ctx), data);
490 error = CRYPTO_ARGUMENTS_BAD;
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.
503 skein_final(crypto_ctx_t *ctx, crypto_data_t *digest, crypto_req_handle_t req)
505 int error = CRYPTO_SUCCESS;
507 ASSERT(SKEIN_CTX(ctx) != NULL);
509 if (digest->cd_length <
510 CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen)) {
512 CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen);
513 return (CRYPTO_BUFFER_TOO_SMALL);
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);
521 case CRYPTO_DATA_UIO:
522 error = skein_digest_final_uio(SKEIN_CTX(ctx), digest, req);
525 error = CRYPTO_ARGUMENTS_BAD;
528 if (error == CRYPTO_SUCCESS)
530 CRYPTO_BITS2BYTES(SKEIN_CTX(ctx)->sc_digest_bitlen);
532 digest->cd_length = 0;
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;
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.
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)
554 skein_ctx_t skein_ctx;
556 SKEIN_CTX_LVALUE(&ctx) = &skein_ctx;
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)
565 SKEIN_OP(&skein_ctx, Init, skein_ctx.sc_digest_bitlen);
567 if ((error = skein_update(&ctx, data, digest)) != CRYPTO_SUCCESS)
569 if ((error = skein_final(&ctx, data, digest)) != CRYPTO_SUCCESS)
573 if (error == CRYPTO_SUCCESS)
575 CRYPTO_BITS2BYTES(skein_ctx.sc_digest_bitlen);
577 digest->cd_length = 0;
578 bzero(&skein_ctx, sizeof (skein_ctx));
584 * Helper function that builds a Skein MAC context from the provided
588 skein_mac_ctx_build(skein_ctx_t *ctx, crypto_mechanism_t *mechanism,
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)
601 SKEIN_OP(ctx, InitExt, ctx->sc_digest_bitlen, 0, key->ck_data,
602 CRYPTO_BITS2BYTES(key->ck_length));
604 return (CRYPTO_SUCCESS);
608 * KCF software provide mac entry points.
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.
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)
625 SKEIN_CTX_LVALUE(ctx) = kmem_alloc(sizeof (*SKEIN_CTX(ctx)),
627 if (SKEIN_CTX(ctx) == NULL)
628 return (CRYPTO_HOST_MEMORY);
630 if (ctx_template != NULL) {
631 bcopy(ctx_template, SKEIN_CTX(ctx),
632 sizeof (*SKEIN_CTX(ctx)));
634 error = skein_mac_ctx_build(SKEIN_CTX(ctx), mechanism, key);
635 if (error != CRYPTO_SUCCESS)
639 return (CRYPTO_SUCCESS);
641 bzero(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
642 kmem_free(SKEIN_CTX(ctx), sizeof (*SKEIN_CTX(ctx)));
647 * The MAC update and final calls are reused from the regular digest code.
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.
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)
662 /* faux crypto context just for skein_digest_{update,final} */
665 skein_ctx_t skein_ctx;
666 SKEIN_CTX_LVALUE(&ctx) = &skein_ctx;
668 if (ctx_template != NULL) {
669 bcopy(ctx_template, &skein_ctx, sizeof (skein_ctx));
671 error = skein_mac_ctx_build(&skein_ctx, mechanism, key);
672 if (error != CRYPTO_SUCCESS)
676 if ((error = skein_update(&ctx, data, req)) != CRYPTO_SUCCESS)
678 if ((error = skein_final(&ctx, mac, req)) != CRYPTO_SUCCESS)
681 return (CRYPTO_SUCCESS);
683 bzero(&skein_ctx, sizeof (skein_ctx));
688 * KCF software provider context management entry points.
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
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)
704 skein_ctx_t *ctx_tmpl;
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)
712 *ctx_template = ctx_tmpl;
713 *ctx_template_size = sizeof (*ctx_tmpl);
715 return (CRYPTO_SUCCESS);
717 bzero(ctx_tmpl, sizeof (*ctx_tmpl));
718 kmem_free(ctx_tmpl, sizeof (*ctx_tmpl));
723 * Frees a skein context in a parent crypto context.
726 skein_free_context(crypto_ctx_t *ctx)
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;
734 return (CRYPTO_SUCCESS);