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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <sys/errno.h>
30 #include <sys/types.h>
31 #include <sys/kmem.h>
32 #include <sys/sysmacros.h>
33 #include <sys/crypto/common.h>
34 #include <sys/crypto/impl.h>
35 #include <sys/crypto/api.h>
36 #include <sys/crypto/spi.h>
37 #include <sys/crypto/sched_impl.h>
38 
39 #define	CRYPTO_OPS_OFFSET(f)		offsetof(crypto_ops_t, co_##f)
40 #define	CRYPTO_VERIFY_OFFSET(f)		offsetof(crypto_verify_ops_t, f)
41 
42 /*
43  * Verify entry points.
44  */
45 
46 /*
47  * See comments for crypto_digest_init_prov().
48  */
49 int
50 crypto_verify_init_prov(crypto_provider_t provider, crypto_session_id_t sid,
51     crypto_mechanism_t *mech, crypto_key_t *key, crypto_ctx_template_t tmpl,
52     crypto_context_t *ctxp, crypto_call_req_t *crq)
53 {
54 	int rv;
55 	crypto_ctx_t *ctx;
56 	kcf_req_params_t params;
57 	kcf_provider_desc_t *pd = provider;
58 	kcf_provider_desc_t *real_provider = pd;
59 
60 	ASSERT(KCF_PROV_REFHELD(pd));
61 
62 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
63 		rv = kcf_get_hardware_provider(mech->cm_type,
64 		    CRYPTO_MECH_INVALID, CRYPTO_OPS_OFFSET(verify_ops),
65 		    CRYPTO_VERIFY_OFFSET(verify_init),
66 		    CHECK_RESTRICT(crq), pd, &real_provider);
67 
68 		if (rv != CRYPTO_SUCCESS)
69 			return (rv);
70 	}
71 
72 	/* Allocate and initialize the canonical context */
73 	if ((ctx = kcf_new_ctx(crq, real_provider, sid)) == NULL) {
74 		if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
75 			KCF_PROV_REFRELE(real_provider);
76 		return (CRYPTO_HOST_MEMORY);
77 	}
78 
79 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_INIT, sid, mech,
80 	    key, NULL, NULL, tmpl);
81 	rv = kcf_submit_request(real_provider, ctx, crq, &params, B_FALSE);
82 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
83 		KCF_PROV_REFRELE(real_provider);
84 
85 	if ((rv == CRYPTO_SUCCESS) || (rv == CRYPTO_QUEUED))
86 		*ctxp = (crypto_context_t)ctx;
87 	else {
88 		/* Release the hold done in kcf_new_ctx(). */
89 		KCF_CONTEXT_REFRELE((kcf_context_t *)ctx->cc_framework_private);
90 	}
91 
92 	return (rv);
93 }
94 
95 
96 int
97 crypto_verify_init(crypto_mechanism_t *mech, crypto_key_t *key,
98     crypto_ctx_template_t tmpl, crypto_context_t *ctxp, crypto_call_req_t *crq)
99 {
100 	int error;
101 	kcf_mech_entry_t *me;
102 	kcf_provider_desc_t *pd;
103 	kcf_prov_tried_t *list = NULL;
104 	kcf_ctx_template_t *ctx_tmpl;
105 	crypto_spi_ctx_template_t spi_ctx_tmpl = NULL;
106 
107 retry:
108 	/* The pd is returned held */
109 	if ((pd = kcf_get_mech_provider(mech->cm_type, &me, &error,
110 	    list, CRYPTO_FG_VERIFY, CHECK_RESTRICT(crq), 0)) == NULL) {
111 		if (list != NULL)
112 			kcf_free_triedlist(list);
113 		return (error);
114 	}
115 
116 	/*
117 	 * For SW providers, check the validity of the context template
118 	 * It is very rare that the generation number mis-matches, so
119 	 * it is acceptable to fail here, and let the consumer recover by
120 	 * freeing this tmpl and create a new one for the key and new SW
121 	 * provider.
122 	 */
123 	if ((pd->pd_prov_type == CRYPTO_SW_PROVIDER) &&
124 	    ((ctx_tmpl = (kcf_ctx_template_t *)tmpl) != NULL)) {
125 		if (ctx_tmpl->ct_generation != me->me_gen_swprov) {
126 			if (list != NULL)
127 				kcf_free_triedlist(list);
128 			KCF_PROV_REFRELE(pd);
129 			return (CRYPTO_OLD_CTX_TEMPLATE);
130 		} else {
131 			spi_ctx_tmpl = ctx_tmpl->ct_prov_tmpl;
132 		}
133 	}
134 
135 	error = crypto_verify_init_prov(pd, pd->pd_sid, mech, key, spi_ctx_tmpl,
136 	    ctxp, crq);
137 
138 	if (error != CRYPTO_SUCCESS && error != CRYPTO_QUEUED &&
139 	    IS_RECOVERABLE(error)) {
140 		/* Add pd to the linked list of providers tried. */
141 		if (kcf_insert_triedlist(&list, pd, KCF_KMFLAG(crq)) != NULL)
142 			goto retry;
143 	}
144 
145 	if (list != NULL)
146 		kcf_free_triedlist(list);
147 	KCF_PROV_REFRELE(pd);
148 	return (error);
149 }
150 
151 int
152 crypto_verify_single(crypto_context_t context, crypto_data_t *data,
153     crypto_data_t *signature, crypto_call_req_t *cr)
154 {
155 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
156 	kcf_context_t *kcf_ctx;
157 	kcf_provider_desc_t *pd;
158 	int error;
159 	kcf_req_params_t params;
160 
161 	if ((ctx == NULL) ||
162 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
163 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
164 		return (CRYPTO_INVALID_CONTEXT);
165 	}
166 
167 	KCF_PROV_REFHOLD(pd);
168 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_SINGLE, 0, NULL,
169 	    NULL, data, signature, NULL);
170 	error = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
171 	KCF_PROV_REFRELE(pd);
172 
173 	/* Release the hold done in kcf_new_ctx() during init step. */
174 	KCF_CONTEXT_COND_RELEASE(error, kcf_ctx);
175 	return (error);
176 }
177 
178 /*
179  * See comments for crypto_digest_update().
180  */
181 int
182 crypto_verify_update(crypto_context_t context, crypto_data_t *data,
183     crypto_call_req_t *cr)
184 
185 {
186 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
187 	kcf_context_t *kcf_ctx;
188 	kcf_provider_desc_t *pd;
189 	kcf_req_params_t params;
190 	int rv;
191 
192 	if ((ctx == NULL) ||
193 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
194 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
195 		return (CRYPTO_INVALID_CONTEXT);
196 	}
197 
198 	ASSERT(pd->pd_prov_type != CRYPTO_LOGICAL_PROVIDER);
199 	KCF_PROV_REFHOLD(pd);
200 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_UPDATE, ctx->cc_session,
201 	    NULL, NULL, data, NULL, NULL);
202 	rv = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
203 	KCF_PROV_REFRELE(pd);
204 
205 	return (rv);
206 }
207 
208 /*
209  * See comments for crypto_digest_final().
210  */
211 int
212 crypto_verify_final(crypto_context_t context, crypto_data_t *signature,
213     crypto_call_req_t *cr)
214 {
215 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
216 	kcf_context_t *kcf_ctx;
217 	kcf_provider_desc_t *pd;
218 	kcf_req_params_t params;
219 	int rv;
220 
221 	if ((ctx == NULL) ||
222 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
223 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
224 		return (CRYPTO_INVALID_CONTEXT);
225 	}
226 
227 	ASSERT(pd->pd_prov_type != CRYPTO_LOGICAL_PROVIDER);
228 	KCF_PROV_REFHOLD(pd);
229 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_FINAL, ctx->cc_session,
230 	    NULL, NULL, NULL, signature, NULL);
231 	rv = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
232 	KCF_PROV_REFRELE(pd);
233 
234 	/* Release the hold done in kcf_new_ctx() during init step. */
235 	KCF_CONTEXT_COND_RELEASE(rv, kcf_ctx);
236 	return (rv);
237 }
238 
239 int
240 crypto_verify_prov(crypto_provider_t provider, crypto_session_id_t sid,
241     crypto_mechanism_t *mech, crypto_key_t *key, crypto_data_t *data,
242     crypto_ctx_template_t tmpl, crypto_data_t *signature,
243     crypto_call_req_t *crq)
244 {
245 	kcf_req_params_t params;
246 	kcf_provider_desc_t *pd = provider;
247 	kcf_provider_desc_t *real_provider = pd;
248 	int rv;
249 
250 	ASSERT(KCF_PROV_REFHELD(pd));
251 
252 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
253 		rv = kcf_get_hardware_provider(mech->cm_type,
254 		    CRYPTO_MECH_INVALID, CRYPTO_OPS_OFFSET(verify_ops),
255 		    CRYPTO_VERIFY_OFFSET(verify_atomic), CHECK_RESTRICT(crq),
256 		    pd, &real_provider);
257 
258 		if (rv != CRYPTO_SUCCESS)
259 			return (rv);
260 	}
261 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_ATOMIC, sid, mech,
262 	    key, data, signature, tmpl);
263 	rv = kcf_submit_request(real_provider, NULL, crq, &params, B_FALSE);
264 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
265 		KCF_PROV_REFRELE(real_provider);
266 
267 	return (rv);
268 }
269 
270 static int
271 verify_vr_atomic_common(crypto_mechanism_t *mech, crypto_key_t *key,
272     crypto_data_t *data, crypto_ctx_template_t tmpl, crypto_data_t *signature,
273     crypto_call_req_t *crq, crypto_func_group_t fg)
274 {
275 	int error;
276 	kcf_mech_entry_t *me;
277 	kcf_provider_desc_t *pd;
278 	kcf_req_params_t params;
279 	kcf_prov_tried_t *list = NULL;
280 	kcf_ctx_template_t *ctx_tmpl;
281 	crypto_spi_ctx_template_t spi_ctx_tmpl = NULL;
282 
283 retry:
284 	/* The pd is returned held */
285 	if ((pd = kcf_get_mech_provider(mech->cm_type, &me, &error, list, fg,
286 	    CHECK_RESTRICT(crq), data->cd_length)) == NULL) {
287 		if (list != NULL)
288 			kcf_free_triedlist(list);
289 		return (error);
290 	}
291 
292 	/*
293 	 * For SW providers, check the validity of the context template
294 	 * It is very rare that the generation number mis-matches, so
295 	 * it is acceptable to fail here, and let the consumer recover by
296 	 * freeing this tmpl and create a new one for the key and new SW
297 	 * provider.
298 	 */
299 	if ((pd->pd_prov_type == CRYPTO_SW_PROVIDER) &&
300 	    ((ctx_tmpl = (kcf_ctx_template_t *)tmpl) != NULL)) {
301 		if (ctx_tmpl->ct_generation != me->me_gen_swprov) {
302 			if (list != NULL)
303 				kcf_free_triedlist(list);
304 			KCF_PROV_REFRELE(pd);
305 			return (CRYPTO_OLD_CTX_TEMPLATE);
306 		} else {
307 			spi_ctx_tmpl = ctx_tmpl->ct_prov_tmpl;
308 		}
309 	}
310 
311 	/* The fast path for SW providers. */
312 	if (CHECK_FASTPATH(crq, pd)) {
313 		crypto_mechanism_t lmech;
314 
315 		lmech = *mech;
316 		KCF_SET_PROVIDER_MECHNUM(mech->cm_type, pd, &lmech);
317 		if (fg == CRYPTO_FG_VERIFY_ATOMIC)
318 			error = KCF_PROV_VERIFY_ATOMIC(pd, pd->pd_sid, &lmech,
319 			    key, data, spi_ctx_tmpl, signature,
320 			    KCF_SWFP_RHNDL(crq));
321 		else
322 			/* Note: The argument order is different from above */
323 			error = KCF_PROV_VERIFY_RECOVER_ATOMIC(pd, pd->pd_sid,
324 			    &lmech, key, signature, spi_ctx_tmpl, data,
325 			    KCF_SWFP_RHNDL(crq));
326 		KCF_PROV_INCRSTATS(pd, error);
327 	} else {
328 		kcf_op_type_t op = ((fg == CRYPTO_FG_VERIFY_ATOMIC) ?
329 		    KCF_OP_ATOMIC : KCF_OP_VERIFY_RECOVER_ATOMIC);
330 
331 		KCF_WRAP_VERIFY_OPS_PARAMS(&params, op, pd->pd_sid,
332 		    mech, key, data, signature, spi_ctx_tmpl);
333 
334 		/* no crypto context to carry between multiple parts. */
335 		error = kcf_submit_request(pd, NULL, crq, &params, B_FALSE);
336 	}
337 
338 	if (error != CRYPTO_SUCCESS && error != CRYPTO_QUEUED &&
339 	    IS_RECOVERABLE(error)) {
340 		/* Add pd to the linked list of providers tried. */
341 		if (kcf_insert_triedlist(&list, pd, KCF_KMFLAG(crq)) != NULL)
342 			goto retry;
343 	}
344 
345 	if (list != NULL)
346 		kcf_free_triedlist(list);
347 
348 	KCF_PROV_REFRELE(pd);
349 	return (error);
350 }
351 
352 int
353 crypto_verify(crypto_mechanism_t *mech, crypto_key_t *key, crypto_data_t *data,
354     crypto_ctx_template_t tmpl, crypto_data_t *signature,
355     crypto_call_req_t *crq)
356 {
357 	return (verify_vr_atomic_common(mech, key, data, tmpl, signature, crq,
358 	    CRYPTO_FG_VERIFY_ATOMIC));
359 }
360 
361 int
362 crypto_verify_recover_prov(crypto_provider_t provider, crypto_session_id_t sid,
363     crypto_mechanism_t *mech, crypto_key_t *key, crypto_data_t *signature,
364     crypto_ctx_template_t tmpl, crypto_data_t *data, crypto_call_req_t *crq)
365 {
366 	kcf_req_params_t params;
367 	kcf_provider_desc_t *pd = provider;
368 	kcf_provider_desc_t *real_provider = pd;
369 	int rv;
370 
371 	ASSERT(KCF_PROV_REFHELD(pd));
372 
373 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
374 		rv = kcf_get_hardware_provider(mech->cm_type,
375 		    CRYPTO_MECH_INVALID, CRYPTO_OPS_OFFSET(verify_ops),
376 		    CRYPTO_VERIFY_OFFSET(verify_recover_atomic),
377 		    CHECK_RESTRICT(crq), pd, &real_provider);
378 
379 		if (rv != CRYPTO_SUCCESS)
380 			return (rv);
381 	}
382 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_VERIFY_RECOVER_ATOMIC,
383 	    sid, mech, key, data, signature, tmpl);
384 	rv = kcf_submit_request(real_provider, NULL, crq, &params, B_FALSE);
385 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
386 		KCF_PROV_REFRELE(real_provider);
387 
388 	return (rv);
389 }
390 
391 int
392 crypto_verify_recover(crypto_mechanism_t *mech, crypto_key_t *key,
393     crypto_data_t *signature, crypto_ctx_template_t tmpl, crypto_data_t *data,
394     crypto_call_req_t *crq)
395 {
396 	return (verify_vr_atomic_common(mech, key, data, tmpl, signature, crq,
397 	    CRYPTO_FG_VERIFY_RECOVER_ATOMIC));
398 }
399 
400 int
401 crypto_verify_recover_init_prov(crypto_provider_t provider,
402     crypto_session_id_t sid, crypto_mechanism_t *mech, crypto_key_t *key,
403     crypto_ctx_template_t tmpl, crypto_context_t *ctxp, crypto_call_req_t *crq)
404 {
405 	int rv;
406 	crypto_ctx_t *ctx;
407 	kcf_req_params_t params;
408 	kcf_provider_desc_t *pd = provider;
409 	kcf_provider_desc_t *real_provider = pd;
410 
411 	ASSERT(KCF_PROV_REFHELD(pd));
412 
413 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
414 		rv = kcf_get_hardware_provider(mech->cm_type,
415 		    CRYPTO_MECH_INVALID, CRYPTO_OPS_OFFSET(verify_ops),
416 		    CRYPTO_VERIFY_OFFSET(verify_recover_init),
417 		    CHECK_RESTRICT(crq), pd, &real_provider);
418 
419 		if (rv != CRYPTO_SUCCESS)
420 			return (rv);
421 	}
422 
423 	/* Allocate and initialize the canonical context */
424 	if ((ctx = kcf_new_ctx(crq, real_provider, sid)) == NULL) {
425 		if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
426 			KCF_PROV_REFRELE(real_provider);
427 		return (CRYPTO_HOST_MEMORY);
428 	}
429 
430 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_VERIFY_RECOVER_INIT,
431 	    sid, mech, key, NULL, NULL, tmpl);
432 	rv = kcf_submit_request(real_provider, ctx, crq, &params, B_FALSE);
433 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
434 		KCF_PROV_REFRELE(real_provider);
435 
436 	if ((rv == CRYPTO_SUCCESS) || (rv == CRYPTO_QUEUED))
437 		*ctxp = (crypto_context_t)ctx;
438 	else {
439 		/* Release the hold done in kcf_new_ctx(). */
440 		KCF_CONTEXT_REFRELE((kcf_context_t *)ctx->cc_framework_private);
441 	}
442 
443 	return (rv);
444 }
445 
446 int
447 crypto_verify_recover_single(crypto_context_t context, crypto_data_t *signature,
448     crypto_data_t *data, crypto_call_req_t *cr)
449 {
450 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
451 	kcf_context_t *kcf_ctx;
452 	kcf_provider_desc_t *pd;
453 	int error;
454 	kcf_req_params_t params;
455 
456 	if ((ctx == NULL) ||
457 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
458 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
459 		return (CRYPTO_INVALID_CONTEXT);
460 	}
461 
462 	KCF_PROV_REFHOLD(pd);
463 	KCF_WRAP_VERIFY_OPS_PARAMS(&params, KCF_OP_VERIFY_RECOVER, 0, NULL,
464 	    NULL, data, signature, NULL);
465 	error = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
466 	KCF_PROV_REFRELE(pd);
467 
468 	/* Release the hold done in kcf_new_ctx() during init step. */
469 	KCF_CONTEXT_COND_RELEASE(error, kcf_ctx);
470 	return (error);
471 }
472