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://www.opensolaris.org/os/licensing.
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 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25 /*
26 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
27 */
28
29 #include <sys/types.h>
30 #include <sys/systm.h>
31 #include <sys/param.h>
32 #include <sys/modctl.h>
33 #include <sys/ddi.h>
34 #include <sys/crypto/spi.h>
35 #include <sys/crypto/impl.h>
36 #include <sys/crypto/ioctladmin.h>
37 #include <sys/sysmacros.h>
38 #include <sys/strsun.h>
39 #include <sys/sha1.h>
40 #include <sys/random.h>
41 #include <sys/conf.h>
42 #include <sys/devops.h>
43 #include <sys/sunddi.h>
44 #include <sys/varargs.h>
45 #include <sys/kmem.h>
46 #include <sys/kstat.h>
47
48 #include <des/des_impl.h>
49 #include <ecc/ecc_impl.h>
50
51 #define CKD_NULL 0x00000001
52
53 extern struct mod_ops mod_cryptoops;
54
55 /*
56 * Module linkage information for the kernel.
57 */
58 static struct modlcrypto modlcrypto = {
59 &mod_cryptoops,
60 "EC Kernel SW Provider"
61 };
62
63 static struct modlinkage modlinkage = {
64 MODREV_1,
65 (void *)&modlcrypto,
66 NULL
67 };
68
69 /*
70 * CSPI information (entry points, provider info, etc.)
71 */
72 typedef enum ecc_mech_type {
73 EC_KEY_PAIR_GEN_MECH_INFO_TYPE, /* SUN_CKM_EC_KEY_PAIR_GEN */
74 ECDSA_MECH_INFO_TYPE, /* SUN_CKM_ECDSA */
75 ECDSA_SHA1_MECH_INFO_TYPE, /* SUN_CKM_ECDSA_SHA1 */
76 ECDH1_DERIVE_MECH_INFO_TYPE /* SUN_CKM_ECDH1_DERIVE */
77 } ecc_mech_type_t;
78
79 /*
80 * Context for ECDSA mechanism.
81 */
82 typedef struct ecc_ctx {
83 ecc_mech_type_t mech_type;
84 crypto_key_t *key;
85 size_t keychunk_size;
86 ECParams ecparams;
87 } ecc_ctx_t;
88
89 /*
90 * Context for ECDSA_SHA1 mechanism.
91 */
92 typedef struct digest_ecc_ctx {
93 ecc_mech_type_t mech_type;
94 crypto_key_t *key;
95 size_t keychunk_size;
96 ECParams ecparams;
97 union {
98 SHA1_CTX sha1ctx;
99 } dctx_u;
100 } digest_ecc_ctx_t;
101
102 #define sha1_ctx dctx_u.sha1ctx
103
104 /*
105 * Mechanism info structure passed to KCF during registration.
106 */
107 static crypto_mech_info_t ecc_mech_info_tab[] = {
108 /* EC_KEY_PAIR_GEN */
109 {SUN_CKM_EC_KEY_PAIR_GEN, EC_KEY_PAIR_GEN_MECH_INFO_TYPE,
110 CRYPTO_FG_GENERATE_KEY_PAIR, EC_MIN_KEY_LEN, EC_MAX_KEY_LEN,
111 CRYPTO_KEYSIZE_UNIT_IN_BITS},
112 /* ECDH */
113 {SUN_CKM_ECDH1_DERIVE, ECDH1_DERIVE_MECH_INFO_TYPE, CRYPTO_FG_DERIVE,
114 EC_MIN_KEY_LEN, EC_MAX_KEY_LEN, CRYPTO_KEYSIZE_UNIT_IN_BITS},
115 /* ECDSA */
116 {SUN_CKM_ECDSA, ECDSA_MECH_INFO_TYPE,
117 CRYPTO_FG_SIGN | CRYPTO_FG_VERIFY |
118 CRYPTO_FG_SIGN_ATOMIC | CRYPTO_FG_VERIFY_ATOMIC,
119 EC_MIN_KEY_LEN, EC_MAX_KEY_LEN, CRYPTO_KEYSIZE_UNIT_IN_BITS},
120 /* ECDSA_SHA1 */
121 {SUN_CKM_ECDSA_SHA1, ECDSA_SHA1_MECH_INFO_TYPE,
122 CRYPTO_FG_SIGN | CRYPTO_FG_VERIFY |
123 CRYPTO_FG_SIGN_ATOMIC | CRYPTO_FG_VERIFY_ATOMIC,
124 EC_MIN_KEY_LEN, EC_MAX_KEY_LEN, CRYPTO_KEYSIZE_UNIT_IN_BITS}
125 };
126
127 static void ecc_provider_status(crypto_provider_handle_t, uint_t *);
128
129 static crypto_control_ops_t ecc_control_ops = {
130 ecc_provider_status
131 };
132
133 static int ecc_sign_init(crypto_ctx_t *, crypto_mechanism_t *,
134 crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t);
135 static int ecc_sign(crypto_ctx_t *, crypto_data_t *, crypto_data_t *,
136 crypto_req_handle_t);
137 static int ecc_sign_update(crypto_ctx_t *, crypto_data_t *,
138 crypto_req_handle_t);
139 static int ecc_sign_final(crypto_ctx_t *, crypto_data_t *,
140 crypto_req_handle_t);
141 static int ecc_sign_atomic(crypto_provider_handle_t, crypto_session_id_t,
142 crypto_mechanism_t *, crypto_key_t *, crypto_data_t *, crypto_data_t *,
143 crypto_spi_ctx_template_t, crypto_req_handle_t);
144
145 static crypto_sign_ops_t ecc_sign_ops = {
146 ecc_sign_init,
147 ecc_sign,
148 ecc_sign_update,
149 ecc_sign_final,
150 ecc_sign_atomic,
151 NULL,
152 NULL,
153 NULL
154 };
155
156 static int ecc_verify_init(crypto_ctx_t *, crypto_mechanism_t *,
157 crypto_key_t *, crypto_spi_ctx_template_t, crypto_req_handle_t);
158 static int ecc_verify(crypto_ctx_t *, crypto_data_t *, crypto_data_t *,
159 crypto_req_handle_t);
160 static int ecc_verify_update(crypto_ctx_t *, crypto_data_t *,
161 crypto_req_handle_t);
162 static int ecc_verify_final(crypto_ctx_t *, crypto_data_t *,
163 crypto_req_handle_t);
164 static int ecc_verify_atomic(crypto_provider_handle_t, crypto_session_id_t,
165 crypto_mechanism_t *, crypto_key_t *, crypto_data_t *,
166 crypto_data_t *, crypto_spi_ctx_template_t, crypto_req_handle_t);
167
168 static crypto_verify_ops_t ecc_verify_ops = {
169 ecc_verify_init,
170 ecc_verify,
171 ecc_verify_update,
172 ecc_verify_final,
173 ecc_verify_atomic,
174 NULL,
175 NULL,
176 NULL
177 };
178
179 static int ecc_nostore_key_generate_pair(crypto_provider_handle_t,
180 crypto_session_id_t, crypto_mechanism_t *, crypto_object_attribute_t *,
181 uint_t, crypto_object_attribute_t *, uint_t, crypto_object_attribute_t *,
182 uint_t, crypto_object_attribute_t *, uint_t, crypto_req_handle_t);
183 static int ecc_nostore_key_derive(crypto_provider_handle_t,
184 crypto_session_id_t, crypto_mechanism_t *, crypto_key_t *,
185 crypto_object_attribute_t *, uint_t, crypto_object_attribute_t *,
186 uint_t, crypto_req_handle_t);
187
188 static crypto_nostore_key_ops_t ecc_nostore_key_ops = {
189 NULL,
190 ecc_nostore_key_generate_pair,
191 ecc_nostore_key_derive
192 };
193
194 static crypto_ops_t ecc_crypto_ops = {
195 &ecc_control_ops,
196 NULL,
197 NULL,
198 NULL,
199 &ecc_sign_ops,
200 &ecc_verify_ops,
201 NULL,
202 NULL,
203 NULL,
204 NULL,
205 NULL,
206 NULL,
207 NULL,
208 NULL,
209 NULL,
210 &ecc_nostore_key_ops,
211 NULL,
212 };
213
214 static crypto_provider_info_t ecc_prov_info = {
215 CRYPTO_SPI_VERSION_4,
216 "EC Software Provider",
217 CRYPTO_SW_PROVIDER,
218 {&modlinkage},
219 NULL,
220 &ecc_crypto_ops,
221 sizeof (ecc_mech_info_tab)/sizeof (crypto_mech_info_t),
222 ecc_mech_info_tab
223 };
224
225 static crypto_kcf_provider_handle_t ecc_prov_handle = NULL;
226
227 static int ecc_sign_common(ecc_ctx_t *, crypto_data_t *, crypto_data_t *,
228 crypto_req_handle_t);
229 static int ecc_verify_common(ecc_ctx_t *, crypto_data_t *, crypto_data_t *,
230 crypto_req_handle_t);
231 static int find_attr(crypto_object_attribute_t *, uint_t, uint64_t);
232 static int get_template_attr_ulong(crypto_object_attribute_t *,
233 uint_t, uint64_t, ulong_t *);
234 static void ecc_free_context(crypto_ctx_t *);
235 static void free_ecparams(ECParams *, boolean_t);
236 static void free_ecprivkey(ECPrivateKey *);
237
238 int
_init(void)239 _init(void)
240 {
241 int ret;
242
243 if ((ret = mod_install(&modlinkage)) != 0)
244 return (ret);
245
246 /* Register with KCF. If the registration fails, remove the module. */
247 if (crypto_register_provider(&ecc_prov_info, &ecc_prov_handle)) {
248 (void) mod_remove(&modlinkage);
249 return (EACCES);
250 }
251
252 return (0);
253 }
254
255 int
_fini(void)256 _fini(void)
257 {
258 /* Unregister from KCF if module is registered */
259 if (ecc_prov_handle != NULL) {
260 if (crypto_unregister_provider(ecc_prov_handle))
261 return (EBUSY);
262
263 ecc_prov_handle = NULL;
264 }
265
266 return (mod_remove(&modlinkage));
267 }
268
269 int
_info(struct modinfo * modinfop)270 _info(struct modinfo *modinfop)
271 {
272 return (mod_info(&modlinkage, modinfop));
273 }
274
275 /* ARGSUSED */
276 static void
ecc_provider_status(crypto_provider_handle_t provider,uint_t * status)277 ecc_provider_status(crypto_provider_handle_t provider, uint_t *status)
278 {
279 *status = CRYPTO_PROVIDER_READY;
280 }
281
282 /*
283 * Return the index of an attribute of specified type found in
284 * the specified array of attributes. If the attribute cannot
285 * found, return -1.
286 */
287 static int
find_attr(crypto_object_attribute_t * attr,uint_t nattr,uint64_t attr_type)288 find_attr(crypto_object_attribute_t *attr, uint_t nattr, uint64_t attr_type)
289 {
290 int i;
291
292 for (i = 0; i < nattr; i++)
293 if (attr[i].oa_value != NULL && attr[i].oa_type == attr_type)
294 return (i);
295 return (-1);
296 }
297
298 /*
299 * Common function used by the get_template_attr_*() family of
300 * functions. Returns the value of the specified attribute of specified
301 * length. Returns CRYPTO_SUCCESS on success, CRYPTO_ATTRIBUTE_VALUE_INVALID
302 * if the length of the attribute does not match the specified length,
303 * or CRYPTO_ARGUMENTS_BAD if the attribute cannot be found.
304 */
305 static int
get_template_attr_scalar_common(crypto_object_attribute_t * template,uint_t nattr,uint64_t attr_type,void * value,size_t value_len)306 get_template_attr_scalar_common(crypto_object_attribute_t *template,
307 uint_t nattr, uint64_t attr_type, void *value, size_t value_len)
308 {
309 size_t oa_value_len;
310 size_t offset = 0;
311 int attr_idx;
312
313 if ((attr_idx = find_attr(template, nattr, attr_type)) == -1)
314 return (CRYPTO_ARGUMENTS_BAD);
315
316 oa_value_len = template[attr_idx].oa_value_len;
317 if (oa_value_len != value_len) {
318 return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
319 }
320
321 do_copy:
322 bcopy(template[attr_idx].oa_value, (uchar_t *)value + offset,
323 oa_value_len);
324
325 return (CRYPTO_SUCCESS);
326 }
327
328 /*
329 * Get the value of a ulong_t attribute from the specified template.
330 */
331 static int
get_template_attr_ulong(crypto_object_attribute_t * template,uint_t nattr,uint64_t attr_type,ulong_t * attr_value)332 get_template_attr_ulong(crypto_object_attribute_t *template,
333 uint_t nattr, uint64_t attr_type, ulong_t *attr_value)
334 {
335 return (get_template_attr_scalar_common(template, nattr,
336 attr_type, attr_value, sizeof (ulong_t)));
337 }
338
339 /*
340 * Called from init routines to do basic sanity checks. Init routines,
341 * e.g. sign_init should fail rather than subsequent operations.
342 */
343 static int
check_mech_and_key(ecc_mech_type_t mech_type,crypto_key_t * key,ulong_t class)344 check_mech_and_key(ecc_mech_type_t mech_type, crypto_key_t *key, ulong_t class)
345 {
346 int rv = CRYPTO_SUCCESS;
347 uchar_t *foo;
348 ssize_t point_len;
349 ssize_t value_len;
350
351 if (mech_type != ECDSA_SHA1_MECH_INFO_TYPE &&
352 mech_type != ECDSA_MECH_INFO_TYPE)
353 return (CRYPTO_MECHANISM_INVALID);
354
355 if (key->ck_format != CRYPTO_KEY_ATTR_LIST) {
356 return (CRYPTO_KEY_TYPE_INCONSISTENT);
357 }
358
359 switch (class) {
360 case CKO_PUBLIC_KEY:
361 if ((rv = crypto_get_key_attr(key, CKA_EC_POINT, &foo,
362 &point_len)) != CRYPTO_SUCCESS) {
363 return (CRYPTO_TEMPLATE_INCOMPLETE);
364 }
365 if (point_len < CRYPTO_BITS2BYTES(EC_MIN_KEY_LEN) * 2 + 1 ||
366 point_len > CRYPTO_BITS2BYTES(EC_MAX_KEY_LEN) * 2 + 1)
367 return (CRYPTO_KEY_SIZE_RANGE);
368 break;
369
370 case CKO_PRIVATE_KEY:
371 if ((rv = crypto_get_key_attr(key, CKA_VALUE, &foo,
372 &value_len)) != CRYPTO_SUCCESS) {
373 return (CRYPTO_TEMPLATE_INCOMPLETE);
374 }
375 if (value_len < CRYPTO_BITS2BYTES(EC_MIN_KEY_LEN) ||
376 value_len > CRYPTO_BITS2BYTES(EC_MAX_KEY_LEN))
377 return (CRYPTO_KEY_SIZE_RANGE);
378 break;
379
380 default:
381 return (CRYPTO_TEMPLATE_INCONSISTENT);
382 }
383
384 return (rv);
385 }
386
387 /*
388 * This function guarantees to return non-zero random numbers.
389 * This is needed as the /dev/urandom kernel interface,
390 * random_get_pseudo_bytes(), may return zeros.
391 */
392 int
ecc_knzero_random_generator(uint8_t * ran_out,size_t ran_len)393 ecc_knzero_random_generator(uint8_t *ran_out, size_t ran_len)
394 {
395 int rv;
396 size_t ebc = 0; /* count of extra bytes in extrarand */
397 size_t i = 0;
398 uint8_t extrarand[32];
399 size_t extrarand_len;
400
401 if ((rv = random_get_pseudo_bytes(ran_out, ran_len)) != 0)
402 return (rv);
403
404 /*
405 * Walk through the returned random numbers pointed by ran_out,
406 * and look for any random number which is zero.
407 * If we find zero, call random_get_pseudo_bytes() to generate
408 * another 32 random numbers pool. Replace any zeros in ran_out[]
409 * from the random number in pool.
410 */
411 while (i < ran_len) {
412 if (ran_out[i] != 0) {
413 i++;
414 continue;
415 }
416
417 /*
418 * Note that it is 'while' so we are guaranteed a
419 * non-zero value on exit.
420 */
421 if (ebc == 0) {
422 /* refresh extrarand */
423 extrarand_len = sizeof (extrarand);
424 if ((rv = random_get_pseudo_bytes(extrarand,
425 extrarand_len)) != 0) {
426 return (rv);
427 }
428
429 ebc = extrarand_len;
430 }
431 /* Replace zero with byte from extrarand. */
432 -- ebc;
433
434 /*
435 * The new random byte zero/non-zero will be checked in
436 * the next pass through the loop.
437 */
438 ran_out[i] = extrarand[ebc];
439 }
440
441 return (CRYPTO_SUCCESS);
442 }
443
444 static void
ecc_free_context(crypto_ctx_t * ctx)445 ecc_free_context(crypto_ctx_t *ctx)
446 {
447 ecc_ctx_t *ctxp = ctx->cc_provider_private;
448
449 if (ctxp != NULL) {
450 bzero(ctxp->key, ctxp->keychunk_size);
451 kmem_free(ctxp->key, ctxp->keychunk_size);
452
453 free_ecparams(&ctxp->ecparams, B_FALSE);
454
455 if (ctxp->mech_type == ECDSA_MECH_INFO_TYPE)
456 kmem_free(ctxp, sizeof (ecc_ctx_t));
457 else
458 kmem_free(ctxp, sizeof (digest_ecc_ctx_t));
459
460 ctx->cc_provider_private = NULL;
461 }
462 }
463
464 /* ARGSUSED */
465 static int
ecc_sign_verify_common_init(crypto_ctx_t * ctx,crypto_mechanism_t * mechanism,crypto_key_t * key,crypto_spi_ctx_template_t ctx_template,crypto_req_handle_t req)466 ecc_sign_verify_common_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism,
467 crypto_key_t *key, crypto_spi_ctx_template_t ctx_template,
468 crypto_req_handle_t req)
469 {
470 int rv;
471 int kmflag;
472 ecc_ctx_t *ctxp;
473 digest_ecc_ctx_t *dctxp;
474 ecc_mech_type_t mech_type = mechanism->cm_type;
475 uchar_t *params;
476 ssize_t params_len;
477 ECParams *ecparams;
478 SECKEYECParams params_item;
479
480 if (crypto_get_key_attr(key, CKA_EC_PARAMS, (void *) ¶ms,
481 ¶ms_len)) {
482 return (CRYPTO_ARGUMENTS_BAD);
483 }
484
485 /* ASN1 check */
486 if (params[0] != 0x06 ||
487 params[1] != params_len - 2) {
488 return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
489 }
490 params_item.data = params;
491 params_item.len = (uint_t)params_len;
492 kmflag = crypto_kmflag(req);
493 if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
494 /* bad curve OID */
495 return (CRYPTO_ARGUMENTS_BAD);
496 }
497
498 /*
499 * Allocate an ECC context.
500 */
501 switch (mech_type) {
502 case ECDSA_SHA1_MECH_INFO_TYPE:
503 dctxp = kmem_zalloc(sizeof (digest_ecc_ctx_t), kmflag);
504 ctxp = (ecc_ctx_t *)dctxp;
505 break;
506 default:
507 ctxp = kmem_zalloc(sizeof (ecc_ctx_t), kmflag);
508 break;
509 }
510
511 if (ctxp == NULL) {
512 free_ecparams(ecparams, B_TRUE);
513 return (CRYPTO_HOST_MEMORY);
514 }
515
516 if ((rv = crypto_copy_key_to_ctx(key, &ctxp->key, &ctxp->keychunk_size,
517 kmflag)) != CRYPTO_SUCCESS) {
518 switch (mech_type) {
519 case ECDSA_SHA1_MECH_INFO_TYPE:
520 kmem_free(dctxp, sizeof (digest_ecc_ctx_t));
521 break;
522 default:
523 kmem_free(ctxp, sizeof (ecc_ctx_t));
524 break;
525 }
526 free_ecparams(ecparams, B_TRUE);
527 return (rv);
528 }
529 ctxp->mech_type = mech_type;
530 ctxp->ecparams = *ecparams;
531 kmem_free(ecparams, sizeof (ECParams));
532
533 switch (mech_type) {
534 case ECDSA_SHA1_MECH_INFO_TYPE:
535 SHA1Init(&(dctxp->sha1_ctx));
536 break;
537 }
538
539 ctx->cc_provider_private = ctxp;
540
541 return (CRYPTO_SUCCESS);
542 }
543
544 /* ARGSUSED */
545 static int
ecc_sign_init(crypto_ctx_t * ctx,crypto_mechanism_t * mechanism,crypto_key_t * key,crypto_spi_ctx_template_t ctx_template,crypto_req_handle_t req)546 ecc_sign_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism,
547 crypto_key_t *key, crypto_spi_ctx_template_t ctx_template,
548 crypto_req_handle_t req)
549 {
550 int rv;
551
552 ecc_mech_type_t mech_type = mechanism->cm_type;
553
554 if ((rv = check_mech_and_key(mech_type, key,
555 CKO_PRIVATE_KEY)) != CRYPTO_SUCCESS)
556 return (rv);
557
558 rv = ecc_sign_verify_common_init(ctx, mechanism, key,
559 ctx_template, req);
560
561 return (rv);
562 }
563
564 /* ARGSUSED */
565 static int
ecc_verify_init(crypto_ctx_t * ctx,crypto_mechanism_t * mechanism,crypto_key_t * key,crypto_spi_ctx_template_t ctx_template,crypto_req_handle_t req)566 ecc_verify_init(crypto_ctx_t *ctx, crypto_mechanism_t *mechanism,
567 crypto_key_t *key, crypto_spi_ctx_template_t ctx_template,
568 crypto_req_handle_t req)
569 {
570 int rv;
571
572 ecc_mech_type_t mech_type = mechanism->cm_type;
573
574 if ((rv = check_mech_and_key(mech_type, key,
575 CKO_PUBLIC_KEY)) != CRYPTO_SUCCESS)
576 return (rv);
577
578 rv = ecc_sign_verify_common_init(ctx, mechanism, key,
579 ctx_template, req);
580
581 return (rv);
582 }
583
584 #define SHA1_DIGEST_SIZE 20
585
586 #define INIT_RAW_CRYPTO_DATA(data, base, len, cd_len) \
587 (data).cd_format = CRYPTO_DATA_RAW; \
588 (data).cd_offset = 0; \
589 (data).cd_raw.iov_base = (char *)base; \
590 (data).cd_raw.iov_len = len; \
591 (data).cd_length = cd_len;
592
593 static int
ecc_digest_svrfy_common(digest_ecc_ctx_t * ctxp,crypto_data_t * data,crypto_data_t * signature,uchar_t flag,crypto_req_handle_t req)594 ecc_digest_svrfy_common(digest_ecc_ctx_t *ctxp, crypto_data_t *data,
595 crypto_data_t *signature, uchar_t flag, crypto_req_handle_t req)
596 {
597 int rv = CRYPTO_FAILED;
598 uchar_t digest[SHA1_DIGEST_LENGTH];
599 crypto_data_t der_cd;
600 ecc_mech_type_t mech_type;
601
602 ASSERT(flag & CRYPTO_DO_SIGN || flag & CRYPTO_DO_VERIFY);
603 ASSERT(data != NULL || (flag & CRYPTO_DO_FINAL));
604
605 mech_type = ctxp->mech_type;
606 if (mech_type != ECDSA_SHA1_MECH_INFO_TYPE)
607 return (CRYPTO_MECHANISM_INVALID);
608
609 /* Don't digest if only returning length of signature. */
610 if (signature->cd_length > 0) {
611 if (mech_type == ECDSA_SHA1_MECH_INFO_TYPE) {
612 rv = crypto_digest_data(data, &(ctxp->sha1_ctx),
613 digest, (void (*)())SHA1Update,
614 (void (*)())SHA1Final, flag | CRYPTO_DO_SHA1);
615 if (rv != CRYPTO_SUCCESS)
616 return (rv);
617 }
618 }
619
620 INIT_RAW_CRYPTO_DATA(der_cd, digest, SHA1_DIGEST_SIZE,
621 SHA1_DIGEST_SIZE);
622
623 if (flag & CRYPTO_DO_SIGN) {
624 rv = ecc_sign_common((ecc_ctx_t *)ctxp, &der_cd, signature,
625 req);
626 } else
627 rv = ecc_verify_common((ecc_ctx_t *)ctxp, &der_cd, signature,
628 req);
629
630 return (rv);
631 }
632
633 /*
634 * This is a single-part signing routine. It does not
635 * compute a hash before signing.
636 */
637 static int
ecc_sign_common(ecc_ctx_t * ctx,crypto_data_t * data,crypto_data_t * signature,crypto_req_handle_t req)638 ecc_sign_common(ecc_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
639 crypto_req_handle_t req)
640 {
641 int rv = CRYPTO_FAILED;
642 SECStatus ss;
643 uchar_t *param;
644 uchar_t *private;
645 ssize_t param_len;
646 ssize_t private_len;
647 uchar_t tmp_data[EC_MAX_DIGEST_LEN];
648 uchar_t signed_data[EC_MAX_SIG_LEN];
649 ECPrivateKey ECkey;
650 SECItem signature_item;
651 SECItem digest_item;
652 crypto_key_t *key = ctx->key;
653 int kmflag;
654
655 if ((rv = crypto_get_key_attr(key, CKA_EC_PARAMS, ¶m,
656 ¶m_len)) != CRYPTO_SUCCESS) {
657 return (rv);
658 }
659
660 if (data->cd_length > sizeof (tmp_data))
661 return (CRYPTO_DATA_LEN_RANGE);
662
663 if ((rv = crypto_get_input_data(data, &digest_item.data, tmp_data))
664 != CRYPTO_SUCCESS) {
665 return (rv);
666 }
667 digest_item.len = data->cd_length;
668
669 /* structure assignment */
670 ECkey.ecParams = ctx->ecparams;
671
672 if ((rv = crypto_get_key_attr(key, CKA_VALUE, &private,
673 &private_len)) != CRYPTO_SUCCESS) {
674 return (rv);
675 }
676 ECkey.privateValue.data = private;
677 ECkey.privateValue.len = (uint_t)private_len;
678
679 signature_item.data = signed_data;
680 signature_item.len = sizeof (signed_data);
681
682 kmflag = crypto_kmflag(req);
683 if ((ss = ECDSA_SignDigest(&ECkey, &signature_item, &digest_item,
684 kmflag)) != SECSuccess) {
685 if (ss == SECBufferTooSmall)
686 return (CRYPTO_BUFFER_TOO_SMALL);
687
688 return (CRYPTO_FAILED);
689 }
690
691 if (rv == CRYPTO_SUCCESS) {
692 /* copy out the signature */
693 if ((rv = crypto_put_output_data(signed_data,
694 signature, signature_item.len)) != CRYPTO_SUCCESS)
695 return (rv);
696
697 signature->cd_length = signature_item.len;
698 }
699
700 return (rv);
701 }
702
703 /* ARGSUSED */
704 static int
ecc_sign(crypto_ctx_t * ctx,crypto_data_t * data,crypto_data_t * signature,crypto_req_handle_t req)705 ecc_sign(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
706 crypto_req_handle_t req)
707 {
708 int rv;
709 ecc_ctx_t *ctxp;
710
711 ASSERT(ctx->cc_provider_private != NULL);
712 ctxp = ctx->cc_provider_private;
713
714 switch (ctxp->mech_type) {
715 case ECDSA_SHA1_MECH_INFO_TYPE:
716 rv = ecc_digest_svrfy_common((digest_ecc_ctx_t *)ctxp, data,
717 signature, CRYPTO_DO_SIGN | CRYPTO_DO_UPDATE |
718 CRYPTO_DO_FINAL, req);
719 break;
720 default:
721 rv = ecc_sign_common(ctxp, data, signature, req);
722 break;
723 }
724
725 if (rv != CRYPTO_BUFFER_TOO_SMALL)
726 ecc_free_context(ctx);
727
728 return (rv);
729 }
730
731 /* ARGSUSED */
732 static int
ecc_sign_update(crypto_ctx_t * ctx,crypto_data_t * data,crypto_req_handle_t req)733 ecc_sign_update(crypto_ctx_t *ctx, crypto_data_t *data, crypto_req_handle_t req)
734 {
735 int rv;
736 digest_ecc_ctx_t *ctxp;
737 ecc_mech_type_t mech_type;
738
739 ASSERT(ctx->cc_provider_private != NULL);
740 ctxp = ctx->cc_provider_private;
741 mech_type = ctxp->mech_type;
742
743 if (mech_type == ECDSA_MECH_INFO_TYPE) {
744 ecc_free_context(ctx);
745 return (CRYPTO_MECHANISM_INVALID);
746 }
747
748 if (mech_type == ECDSA_SHA1_MECH_INFO_TYPE)
749 rv = crypto_digest_data(data, &(ctxp->sha1_ctx), NULL,
750 (void (*)())SHA1Update, (void (*)())SHA1Final,
751 CRYPTO_DO_SHA1 | CRYPTO_DO_UPDATE);
752
753 if (rv != CRYPTO_SUCCESS)
754 ecc_free_context(ctx);
755
756 return (rv);
757 }
758
759 /* ARGSUSED */
760 static int
ecc_sign_final(crypto_ctx_t * ctx,crypto_data_t * signature,crypto_req_handle_t req)761 ecc_sign_final(crypto_ctx_t *ctx, crypto_data_t *signature,
762 crypto_req_handle_t req)
763 {
764 int rv;
765 digest_ecc_ctx_t *ctxp;
766
767 ASSERT(ctx->cc_provider_private != NULL);
768 ctxp = ctx->cc_provider_private;
769
770 rv = ecc_digest_svrfy_common(ctxp, NULL, signature, CRYPTO_DO_SIGN |
771 CRYPTO_DO_FINAL, req);
772 if (rv != CRYPTO_BUFFER_TOO_SMALL)
773 ecc_free_context(ctx);
774
775 return (rv);
776 }
777
778 /* ARGSUSED */
779 static int
ecc_sign_atomic(crypto_provider_handle_t provider,crypto_session_id_t session_id,crypto_mechanism_t * mechanism,crypto_key_t * key,crypto_data_t * data,crypto_data_t * signature,crypto_spi_ctx_template_t ctx_template,crypto_req_handle_t req)780 ecc_sign_atomic(crypto_provider_handle_t provider,
781 crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
782 crypto_key_t *key, crypto_data_t *data, crypto_data_t *signature,
783 crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req)
784 {
785 int rv;
786 ecc_mech_type_t mech_type = mechanism->cm_type;
787 uchar_t *params;
788 ssize_t params_len;
789 ECParams *ecparams;
790 SECKEYECParams params_item;
791 int kmflag;
792
793 if ((rv = check_mech_and_key(mech_type, key,
794 CKO_PRIVATE_KEY)) != CRYPTO_SUCCESS)
795 return (rv);
796
797 if (crypto_get_key_attr(key, CKA_EC_PARAMS, (void *) ¶ms,
798 ¶ms_len)) {
799 return (CRYPTO_ARGUMENTS_BAD);
800 }
801
802 /* ASN1 check */
803 if (params[0] != 0x06 ||
804 params[1] != params_len - 2) {
805 return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
806 }
807 params_item.data = params;
808 params_item.len = (uint_t)params_len;
809 kmflag = crypto_kmflag(req);
810 if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
811 /* bad curve OID */
812 return (CRYPTO_ARGUMENTS_BAD);
813 }
814
815 if (mechanism->cm_type == ECDSA_MECH_INFO_TYPE) {
816 ecc_ctx_t ctx;
817
818 ctx.mech_type = mech_type;
819 /* structure assignment */
820 ctx.ecparams = *ecparams;
821 ctx.key = key;
822 rv = ecc_sign_common(&ctx, data, signature, req);
823 } else {
824 digest_ecc_ctx_t dctx;
825
826 dctx.mech_type = mech_type;
827 /* structure assignment */
828 dctx.ecparams = *ecparams;
829 dctx.key = key;
830 SHA1Init(&(dctx.sha1_ctx));
831
832 rv = ecc_digest_svrfy_common(&dctx, data, signature,
833 CRYPTO_DO_SIGN | CRYPTO_DO_UPDATE | CRYPTO_DO_FINAL, req);
834 }
835 free_ecparams(ecparams, B_TRUE);
836
837 return (rv);
838 }
839
840 static int
ecc_verify_common(ecc_ctx_t * ctx,crypto_data_t * data,crypto_data_t * signature,crypto_req_handle_t req)841 ecc_verify_common(ecc_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
842 crypto_req_handle_t req)
843 {
844 int rv = CRYPTO_FAILED;
845 uchar_t *param;
846 uchar_t *public;
847 ssize_t param_len;
848 ssize_t public_len;
849 uchar_t tmp_data[EC_MAX_DIGEST_LEN];
850 uchar_t signed_data[EC_MAX_SIG_LEN];
851 ECPublicKey ECkey;
852 SECItem signature_item;
853 SECItem digest_item;
854 crypto_key_t *key = ctx->key;
855 int kmflag;
856
857 if ((rv = crypto_get_key_attr(key, CKA_EC_PARAMS, ¶m,
858 ¶m_len)) != CRYPTO_SUCCESS) {
859 return (rv);
860 }
861
862 if (signature->cd_length > sizeof (signed_data)) {
863 return (CRYPTO_SIGNATURE_LEN_RANGE);
864 }
865
866 if ((rv = crypto_get_input_data(signature, &signature_item.data,
867 signed_data)) != CRYPTO_SUCCESS) {
868 return (rv);
869 }
870 signature_item.len = signature->cd_length;
871
872 if (data->cd_length > sizeof (tmp_data))
873 return (CRYPTO_DATA_LEN_RANGE);
874
875 if ((rv = crypto_get_input_data(data, &digest_item.data, tmp_data))
876 != CRYPTO_SUCCESS) {
877 return (rv);
878 }
879 digest_item.len = data->cd_length;
880
881 /* structure assignment */
882 ECkey.ecParams = ctx->ecparams;
883
884 if ((rv = crypto_get_key_attr(key, CKA_EC_POINT, &public,
885 &public_len)) != CRYPTO_SUCCESS) {
886 return (rv);
887 }
888 ECkey.publicValue.data = public;
889 ECkey.publicValue.len = (uint_t)public_len;
890
891 kmflag = crypto_kmflag(req);
892 if (ECDSA_VerifyDigest(&ECkey, &signature_item, &digest_item, kmflag)
893 != SECSuccess) {
894 rv = CRYPTO_SIGNATURE_INVALID;
895 } else {
896 rv = CRYPTO_SUCCESS;
897 }
898
899 return (rv);
900 }
901
902 /* ARGSUSED */
903 static int
ecc_verify(crypto_ctx_t * ctx,crypto_data_t * data,crypto_data_t * signature,crypto_req_handle_t req)904 ecc_verify(crypto_ctx_t *ctx, crypto_data_t *data, crypto_data_t *signature,
905 crypto_req_handle_t req)
906 {
907 int rv;
908 ecc_ctx_t *ctxp;
909
910 ASSERT(ctx->cc_provider_private != NULL);
911 ctxp = ctx->cc_provider_private;
912
913 switch (ctxp->mech_type) {
914 case ECDSA_SHA1_MECH_INFO_TYPE:
915 rv = ecc_digest_svrfy_common((digest_ecc_ctx_t *)ctxp, data,
916 signature, CRYPTO_DO_VERIFY | CRYPTO_DO_UPDATE |
917 CRYPTO_DO_FINAL, req);
918 break;
919 default:
920 rv = ecc_verify_common(ctxp, data, signature, req);
921 break;
922 }
923
924 ecc_free_context(ctx);
925 return (rv);
926 }
927
928 /* ARGSUSED */
929 static int
ecc_verify_update(crypto_ctx_t * ctx,crypto_data_t * data,crypto_req_handle_t req)930 ecc_verify_update(crypto_ctx_t *ctx, crypto_data_t *data,
931 crypto_req_handle_t req)
932 {
933 int rv;
934 digest_ecc_ctx_t *ctxp;
935
936 ASSERT(ctx->cc_provider_private != NULL);
937 ctxp = ctx->cc_provider_private;
938
939 switch (ctxp->mech_type) {
940 case ECDSA_SHA1_MECH_INFO_TYPE:
941 rv = crypto_digest_data(data, &(ctxp->sha1_ctx), NULL,
942 (void (*)())SHA1Update, (void (*)())SHA1Final,
943 CRYPTO_DO_SHA1 | CRYPTO_DO_UPDATE);
944 break;
945 default:
946 rv = CRYPTO_MECHANISM_INVALID;
947 }
948
949 if (rv != CRYPTO_SUCCESS)
950 ecc_free_context(ctx);
951
952 return (rv);
953 }
954
955 /* ARGSUSED */
956 static int
ecc_verify_final(crypto_ctx_t * ctx,crypto_data_t * signature,crypto_req_handle_t req)957 ecc_verify_final(crypto_ctx_t *ctx, crypto_data_t *signature,
958 crypto_req_handle_t req)
959 {
960 int rv;
961 digest_ecc_ctx_t *ctxp;
962
963 ASSERT(ctx->cc_provider_private != NULL);
964 ctxp = ctx->cc_provider_private;
965
966 rv = ecc_digest_svrfy_common(ctxp, NULL, signature,
967 CRYPTO_DO_VERIFY | CRYPTO_DO_FINAL, req);
968
969 ecc_free_context(ctx);
970
971 return (rv);
972 }
973
974
975 /* ARGSUSED */
976 static int
ecc_verify_atomic(crypto_provider_handle_t provider,crypto_session_id_t session_id,crypto_mechanism_t * mechanism,crypto_key_t * key,crypto_data_t * data,crypto_data_t * signature,crypto_spi_ctx_template_t ctx_template,crypto_req_handle_t req)977 ecc_verify_atomic(crypto_provider_handle_t provider,
978 crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
979 crypto_key_t *key, crypto_data_t *data, crypto_data_t *signature,
980 crypto_spi_ctx_template_t ctx_template, crypto_req_handle_t req)
981 {
982 int rv;
983 ecc_mech_type_t mech_type = mechanism->cm_type;
984 uchar_t *params;
985 ssize_t params_len;
986 ECParams *ecparams;
987 SECKEYECParams params_item;
988 int kmflag;
989
990 if ((rv = check_mech_and_key(mech_type, key,
991 CKO_PUBLIC_KEY)) != CRYPTO_SUCCESS)
992 return (rv);
993
994 if (crypto_get_key_attr(key, CKA_EC_PARAMS, (void *) ¶ms,
995 ¶ms_len)) {
996 return (CRYPTO_ARGUMENTS_BAD);
997 }
998
999 /* ASN1 check */
1000 if (params[0] != 0x06 ||
1001 params[1] != params_len - 2) {
1002 return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
1003 }
1004 params_item.data = params;
1005 params_item.len = (uint_t)params_len;
1006 kmflag = crypto_kmflag(req);
1007 if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
1008 /* bad curve OID */
1009 return (CRYPTO_ARGUMENTS_BAD);
1010 }
1011
1012 if (mechanism->cm_type == ECDSA_MECH_INFO_TYPE) {
1013 ecc_ctx_t ctx;
1014
1015 ctx.mech_type = mech_type;
1016 /* structure assignment */
1017 ctx.ecparams = *ecparams;
1018 ctx.key = key;
1019 rv = ecc_verify_common(&ctx, data, signature, req);
1020 } else {
1021 digest_ecc_ctx_t dctx;
1022
1023 dctx.mech_type = mech_type;
1024 /* structure assignment */
1025 dctx.ecparams = *ecparams;
1026 dctx.key = key;
1027 SHA1Init(&(dctx.sha1_ctx));
1028
1029 rv = ecc_digest_svrfy_common(&dctx, data, signature,
1030 CRYPTO_DO_VERIFY | CRYPTO_DO_UPDATE | CRYPTO_DO_FINAL, req);
1031 }
1032 free_ecparams(ecparams, B_TRUE);
1033 return (rv);
1034 }
1035
1036 /* ARGSUSED */
1037 static int
ecc_nostore_key_generate_pair(crypto_provider_handle_t provider,crypto_session_id_t session_id,crypto_mechanism_t * mechanism,crypto_object_attribute_t * pub_template,uint_t pub_attribute_count,crypto_object_attribute_t * pri_template,uint_t pri_attribute_count,crypto_object_attribute_t * pub_out_template,uint_t pub_out_attribute_count,crypto_object_attribute_t * pri_out_template,uint_t pri_out_attribute_count,crypto_req_handle_t req)1038 ecc_nostore_key_generate_pair(crypto_provider_handle_t provider,
1039 crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
1040 crypto_object_attribute_t *pub_template, uint_t pub_attribute_count,
1041 crypto_object_attribute_t *pri_template, uint_t pri_attribute_count,
1042 crypto_object_attribute_t *pub_out_template, uint_t pub_out_attribute_count,
1043 crypto_object_attribute_t *pri_out_template, uint_t pri_out_attribute_count,
1044 crypto_req_handle_t req)
1045 {
1046 int rv = CRYPTO_SUCCESS;
1047 ECPrivateKey *privKey; /* contains both public and private values */
1048 ECParams *ecparams;
1049 SECKEYECParams params_item;
1050 ulong_t pub_key_type = ~0UL, pub_class = ~0UL;
1051 ulong_t pri_key_type = ~0UL, pri_class = ~0UL;
1052 int params_idx, value_idx, point_idx;
1053 uchar_t *params = NULL;
1054 unsigned params_len;
1055 uchar_t *value = NULL;
1056 uchar_t *point = NULL;
1057 int valuelen;
1058 int pointlen;
1059 int xylen;
1060 int kmflag;
1061
1062 if (mechanism->cm_type != EC_KEY_PAIR_GEN_MECH_INFO_TYPE) {
1063 return (CRYPTO_MECHANISM_INVALID);
1064 }
1065
1066 /* optional */
1067 (void) get_template_attr_ulong(pub_template,
1068 pub_attribute_count, CKA_CLASS, &pub_class);
1069
1070 /* optional */
1071 (void) get_template_attr_ulong(pri_template,
1072 pri_attribute_count, CKA_CLASS, &pri_class);
1073
1074 /* optional */
1075 (void) get_template_attr_ulong(pub_template,
1076 pub_attribute_count, CKA_KEY_TYPE, &pub_key_type);
1077
1078 /* optional */
1079 (void) get_template_attr_ulong(pri_template,
1080 pri_attribute_count, CKA_KEY_TYPE, &pri_key_type);
1081
1082 if (pub_class != ~0UL && pub_class != CKO_PUBLIC_KEY) {
1083 return (CRYPTO_TEMPLATE_INCONSISTENT);
1084 }
1085 pub_class = CKO_PUBLIC_KEY;
1086
1087 if (pri_class != ~0UL && pri_class != CKO_PRIVATE_KEY) {
1088 return (CRYPTO_TEMPLATE_INCONSISTENT);
1089 }
1090 pri_class = CKO_PRIVATE_KEY;
1091
1092 if (pub_key_type != ~0UL && pub_key_type != CKK_EC) {
1093 return (CRYPTO_TEMPLATE_INCONSISTENT);
1094 }
1095 pub_key_type = CKK_EC;
1096
1097 if (pri_key_type != ~0UL && pri_key_type != CKK_EC) {
1098 return (CRYPTO_TEMPLATE_INCONSISTENT);
1099 }
1100 pri_key_type = CKK_EC;
1101
1102 /* public output template must contain CKA_EC_POINT attribute */
1103 if ((point_idx = find_attr(pub_out_template, pub_out_attribute_count,
1104 CKA_EC_POINT)) == -1) {
1105 return (CRYPTO_TEMPLATE_INCOMPLETE);
1106 }
1107
1108 /* private output template must contain CKA_VALUE attribute */
1109 if ((value_idx = find_attr(pri_out_template, pri_out_attribute_count,
1110 CKA_VALUE)) == -1) {
1111 return (CRYPTO_TEMPLATE_INCOMPLETE);
1112 }
1113
1114 if ((params_idx = find_attr(pub_template, pub_attribute_count,
1115 CKA_EC_PARAMS)) == -1) {
1116 return (CRYPTO_TEMPLATE_INCOMPLETE);
1117 }
1118
1119 params = (uchar_t *)pub_template[params_idx].oa_value;
1120 params_len = pub_template[params_idx].oa_value_len;
1121
1122 value = (uchar_t *)pri_out_template[value_idx].oa_value;
1123 valuelen = (int)pri_out_template[value_idx].oa_value_len;
1124 point = (uchar_t *)pub_out_template[point_idx].oa_value;
1125 pointlen = (int)pub_out_template[point_idx].oa_value_len;
1126
1127 /* ASN1 check */
1128 if (params[0] != 0x06 ||
1129 params[1] != params_len - 2) {
1130 return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
1131 }
1132 params_item.data = params;
1133 params_item.len = params_len;
1134 kmflag = crypto_kmflag(req);
1135 if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
1136 /* bad curve OID */
1137 return (CRYPTO_ARGUMENTS_BAD);
1138 }
1139
1140 if (EC_NewKey(ecparams, &privKey, kmflag) != SECSuccess) {
1141 free_ecparams(ecparams, B_TRUE);
1142 return (CRYPTO_FAILED);
1143 }
1144
1145 xylen = privKey->publicValue.len;
1146 /* ASSERT that xylen - 1 is divisible by 2 */
1147 if (xylen > pointlen) {
1148 rv = CRYPTO_BUFFER_TOO_SMALL;
1149 goto out;
1150 }
1151
1152 if (privKey->privateValue.len > valuelen) {
1153 rv = CRYPTO_BUFFER_TOO_SMALL;
1154 goto out;
1155 }
1156 bcopy(privKey->privateValue.data, value, privKey->privateValue.len);
1157 pri_out_template[value_idx].oa_value_len = privKey->privateValue.len;
1158
1159 bcopy(privKey->publicValue.data, point, xylen);
1160 pub_out_template[point_idx].oa_value_len = xylen;
1161
1162 out:
1163 free_ecprivkey(privKey);
1164 free_ecparams(ecparams, B_TRUE);
1165 return (rv);
1166 }
1167
1168 /* ARGSUSED */
1169 static int
ecc_nostore_key_derive(crypto_provider_handle_t provider,crypto_session_id_t session_id,crypto_mechanism_t * mechanism,crypto_key_t * base_key,crypto_object_attribute_t * in_attrs,uint_t in_attr_count,crypto_object_attribute_t * out_attrs,uint_t out_attr_count,crypto_req_handle_t req)1170 ecc_nostore_key_derive(crypto_provider_handle_t provider,
1171 crypto_session_id_t session_id, crypto_mechanism_t *mechanism,
1172 crypto_key_t *base_key, crypto_object_attribute_t *in_attrs,
1173 uint_t in_attr_count, crypto_object_attribute_t *out_attrs,
1174 uint_t out_attr_count, crypto_req_handle_t req)
1175 {
1176 int rv = CRYPTO_SUCCESS;
1177 int params_idx, value_idx = -1, out_value_idx = -1;
1178 ulong_t key_type;
1179 ulong_t key_len;
1180 crypto_object_attribute_t *attrs;
1181 ECParams *ecparams;
1182 SECKEYECParams params_item;
1183 CK_ECDH1_DERIVE_PARAMS *mech_param;
1184 SECItem public_value_item, private_value_item, secret_item;
1185 int kmflag;
1186
1187 if (mechanism->cm_type != ECDH1_DERIVE_MECH_INFO_TYPE) {
1188 return (CRYPTO_MECHANISM_INVALID);
1189 }
1190
1191 ASSERT(IS_P2ALIGNED(mechanism->cm_param, sizeof (uint64_t)));
1192 /* LINTED: pointer alignment */
1193 mech_param = (CK_ECDH1_DERIVE_PARAMS *)mechanism->cm_param;
1194 if (mech_param->kdf != CKD_NULL) {
1195 return (CRYPTO_MECHANISM_PARAM_INVALID);
1196 }
1197
1198 if ((base_key->ck_format != CRYPTO_KEY_ATTR_LIST) ||
1199 (base_key->ck_count == 0)) {
1200 return (CRYPTO_ARGUMENTS_BAD);
1201 }
1202
1203 if ((rv = get_template_attr_ulong(in_attrs, in_attr_count,
1204 CKA_KEY_TYPE, &key_type)) != CRYPTO_SUCCESS) {
1205 return (rv);
1206 }
1207
1208 switch (key_type) {
1209 case CKK_DES:
1210 key_len = DES_KEYSIZE;
1211 break;
1212 case CKK_DES2:
1213 key_len = DES2_KEYSIZE;
1214 break;
1215 case CKK_DES3:
1216 key_len = DES3_KEYSIZE;
1217 break;
1218 case CKK_RC4:
1219 case CKK_AES:
1220 case CKK_GENERIC_SECRET:
1221 if ((rv = get_template_attr_ulong(in_attrs, in_attr_count,
1222 CKA_VALUE_LEN, &key_len)) != CRYPTO_SUCCESS) {
1223 return (rv);
1224 }
1225 break;
1226 default:
1227 key_len = 0;
1228 }
1229
1230 attrs = base_key->ck_attrs;
1231 if ((value_idx = find_attr(attrs, base_key->ck_count,
1232 CKA_VALUE)) == -1) {
1233 return (CRYPTO_TEMPLATE_INCOMPLETE);
1234 }
1235
1236 if ((params_idx = find_attr(attrs, base_key->ck_count,
1237 CKA_EC_PARAMS)) == -1) {
1238 return (CRYPTO_TEMPLATE_INCOMPLETE);
1239 }
1240
1241 private_value_item.data = (uchar_t *)attrs[value_idx].oa_value;
1242 private_value_item.len = attrs[value_idx].oa_value_len;
1243
1244 params_item.len = attrs[params_idx].oa_value_len;
1245 params_item.data = (uchar_t *)attrs[params_idx].oa_value;
1246
1247 /* ASN1 check */
1248 if (params_item.data[0] != 0x06 ||
1249 params_item.data[1] != params_item.len - 2) {
1250 return (CRYPTO_ATTRIBUTE_VALUE_INVALID);
1251 }
1252 kmflag = crypto_kmflag(req);
1253 if (EC_DecodeParams(¶ms_item, &ecparams, kmflag) != SECSuccess) {
1254 /* bad curve OID */
1255 return (CRYPTO_ARGUMENTS_BAD);
1256 }
1257
1258 public_value_item.data = (uchar_t *)mech_param->pPublicData;
1259 public_value_item.len = mech_param->ulPublicDataLen;
1260
1261 if ((out_value_idx = find_attr(out_attrs, out_attr_count,
1262 CKA_VALUE)) == -1) {
1263 rv = CRYPTO_TEMPLATE_INCOMPLETE;
1264 goto out;
1265 }
1266 secret_item.data = NULL;
1267 secret_item.len = 0;
1268
1269 if (ECDH_Derive(&public_value_item, ecparams, &private_value_item,
1270 B_FALSE, &secret_item, kmflag) != SECSuccess) {
1271 free_ecparams(ecparams, B_TRUE);
1272 return (CRYPTO_FAILED);
1273 } else {
1274 rv = CRYPTO_SUCCESS;
1275 }
1276
1277 if (key_len == 0)
1278 key_len = secret_item.len;
1279
1280 if (key_len > secret_item.len) {
1281 rv = CRYPTO_ATTRIBUTE_VALUE_INVALID;
1282 goto out;
1283 }
1284 if (key_len > out_attrs[out_value_idx].oa_value_len) {
1285 rv = CRYPTO_BUFFER_TOO_SMALL;
1286 goto out;
1287 }
1288 bcopy(secret_item.data + secret_item.len - key_len,
1289 (uchar_t *)out_attrs[out_value_idx].oa_value, key_len);
1290 out_attrs[out_value_idx].oa_value_len = key_len;
1291 out:
1292 free_ecparams(ecparams, B_TRUE);
1293 SECITEM_FreeItem(&secret_item, B_FALSE);
1294 return (rv);
1295 }
1296
1297 static void
free_ecparams(ECParams * params,boolean_t freeit)1298 free_ecparams(ECParams *params, boolean_t freeit)
1299 {
1300 SECITEM_FreeItem(¶ms->fieldID.u.prime, B_FALSE);
1301 SECITEM_FreeItem(¶ms->curve.a, B_FALSE);
1302 SECITEM_FreeItem(¶ms->curve.b, B_FALSE);
1303 SECITEM_FreeItem(¶ms->curve.seed, B_FALSE);
1304 SECITEM_FreeItem(¶ms->base, B_FALSE);
1305 SECITEM_FreeItem(¶ms->order, B_FALSE);
1306 SECITEM_FreeItem(¶ms->DEREncoding, B_FALSE);
1307 SECITEM_FreeItem(¶ms->curveOID, B_FALSE);
1308 if (freeit)
1309 kmem_free(params, sizeof (ECParams));
1310 }
1311
1312 static void
free_ecprivkey(ECPrivateKey * key)1313 free_ecprivkey(ECPrivateKey *key)
1314 {
1315 free_ecparams(&key->ecParams, B_FALSE);
1316 SECITEM_FreeItem(&key->publicValue, B_FALSE);
1317 bzero(key->privateValue.data, key->privateValue.len);
1318 SECITEM_FreeItem(&key->privateValue, B_FALSE);
1319 SECITEM_FreeItem(&key->version, B_FALSE);
1320 kmem_free(key, sizeof (ECPrivateKey));
1321 }
1322