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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
23  */
24 
25 #include <sys/errno.h>
26 #include <sys/types.h>
27 #include <sys/kmem.h>
28 #include <sys/sysmacros.h>
29 #include <sys/crypto/common.h>
30 #include <sys/crypto/impl.h>
31 #include <sys/crypto/api.h>
32 #include <sys/crypto/spi.h>
33 #include <sys/crypto/sched_impl.h>
34 
35 #define	CRYPTO_OPS_OFFSET(f)		offsetof(crypto_ops_t, co_##f)
36 #define	CRYPTO_SIGN_OFFSET(f)		offsetof(crypto_sign_ops_t, f)
37 
38 /*
39  * Sign entry points.
40  */
41 
42 /*
43  * See comments for crypto_digest_init_prov().
44  */
45 int
crypto_sign_init_prov(crypto_provider_t provider,crypto_session_id_t sid,crypto_mechanism_t * mech,crypto_key_t * key,crypto_ctx_template_t tmpl,crypto_context_t * ctxp,crypto_call_req_t * crq)46 crypto_sign_init_prov(crypto_provider_t provider, crypto_session_id_t sid,
47     crypto_mechanism_t *mech, crypto_key_t *key, crypto_ctx_template_t tmpl,
48     crypto_context_t *ctxp, crypto_call_req_t *crq)
49 {
50 	int rv;
51 	crypto_ctx_t *ctx;
52 	kcf_req_params_t params;
53 	kcf_provider_desc_t *pd = provider;
54 	kcf_provider_desc_t *real_provider = pd;
55 
56 	ASSERT(KCF_PROV_REFHELD(pd));
57 
58 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
59 		rv = kcf_get_hardware_provider(mech->cm_type, key,
60 		    CRYPTO_MECH_INVALID, NULL, pd, &real_provider,
61 		    CRYPTO_FG_SIGN);
62 
63 		if (rv != CRYPTO_SUCCESS)
64 			return (rv);
65 	}
66 
67 	/* Allocate and initialize the canonical context */
68 	if ((ctx = kcf_new_ctx(crq, real_provider, sid)) == NULL) {
69 		if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
70 			KCF_PROV_REFRELE(real_provider);
71 		return (CRYPTO_HOST_MEMORY);
72 	}
73 
74 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_INIT, sid, mech,
75 	    key, NULL, NULL, tmpl);
76 	rv = kcf_submit_request(real_provider, ctx, crq, &params, B_FALSE);
77 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
78 		KCF_PROV_REFRELE(real_provider);
79 
80 	if ((rv == CRYPTO_SUCCESS) || (rv == CRYPTO_QUEUED))
81 		*ctxp = (crypto_context_t)ctx;
82 	else {
83 		/* Release the hold done in kcf_new_ctx(). */
84 		KCF_CONTEXT_REFRELE((kcf_context_t *)ctx->cc_framework_private);
85 	}
86 
87 	return (rv);
88 }
89 
90 int
crypto_sign_init(crypto_mechanism_t * mech,crypto_key_t * key,crypto_ctx_template_t tmpl,crypto_context_t * ctxp,crypto_call_req_t * crq)91 crypto_sign_init(crypto_mechanism_t *mech, crypto_key_t *key,
92     crypto_ctx_template_t tmpl, crypto_context_t *ctxp, crypto_call_req_t *crq)
93 {
94 	int error;
95 	kcf_mech_entry_t *me;
96 	kcf_provider_desc_t *pd;
97 	kcf_prov_tried_t *list = NULL;
98 	kcf_ctx_template_t *ctx_tmpl;
99 	crypto_spi_ctx_template_t spi_ctx_tmpl = NULL;
100 
101 retry:
102 	/* The pd is returned held */
103 	if ((pd = kcf_get_mech_provider(mech->cm_type, key, &me, &error,
104 	    list, CRYPTO_FG_SIGN, 0)) == NULL) {
105 		if (list != NULL)
106 			kcf_free_triedlist(list);
107 		return (error);
108 	}
109 
110 	/*
111 	 * For SW providers, check the validity of the context template
112 	 * It is very rare that the generation number mis-matches, so
113 	 * it is acceptable to fail here, and let the consumer recover by
114 	 * freeing this tmpl and create a new one for the key and new SW
115 	 * provider.
116 	 */
117 	if ((pd->pd_prov_type == CRYPTO_SW_PROVIDER) &&
118 	    ((ctx_tmpl = (kcf_ctx_template_t *)tmpl) != NULL)) {
119 		if (ctx_tmpl->ct_generation != me->me_gen_swprov) {
120 			if (list != NULL)
121 				kcf_free_triedlist(list);
122 			KCF_PROV_REFRELE(pd);
123 			return (CRYPTO_OLD_CTX_TEMPLATE);
124 		} else {
125 			spi_ctx_tmpl = ctx_tmpl->ct_prov_tmpl;
126 		}
127 	}
128 
129 	error = crypto_sign_init_prov(pd, pd->pd_sid, mech, key, spi_ctx_tmpl,
130 	    ctxp, crq);
131 
132 	if (error != CRYPTO_SUCCESS && error != CRYPTO_QUEUED &&
133 	    IS_RECOVERABLE(error)) {
134 		/* Add pd to the linked list of providers tried. */
135 		if (kcf_insert_triedlist(&list, pd, KCF_KMFLAG(crq)) != NULL)
136 			goto retry;
137 	}
138 
139 	if (list != NULL)
140 		kcf_free_triedlist(list);
141 	KCF_PROV_REFRELE(pd);
142 	return (error);
143 }
144 
145 int
crypto_sign_single(crypto_context_t context,crypto_data_t * data,crypto_data_t * signature,crypto_call_req_t * cr)146 crypto_sign_single(crypto_context_t context, crypto_data_t *data,
147     crypto_data_t *signature, crypto_call_req_t *cr)
148 {
149 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
150 	kcf_context_t *kcf_ctx;
151 	kcf_provider_desc_t *pd;
152 	int error;
153 	kcf_req_params_t params;
154 
155 	if ((ctx == NULL) ||
156 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
157 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
158 		return (CRYPTO_INVALID_CONTEXT);
159 	}
160 
161 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_SINGLE, 0, NULL,
162 	    NULL, data, signature, NULL);
163 	error = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
164 
165 	/* Release the hold done in kcf_new_ctx() during init step. */
166 	KCF_CONTEXT_COND_RELEASE(error, kcf_ctx);
167 	return (error);
168 }
169 
170 /*
171  * See comments for crypto_digest_update().
172  */
173 int
crypto_sign_update(crypto_context_t context,crypto_data_t * data,crypto_call_req_t * cr)174 crypto_sign_update(crypto_context_t context, crypto_data_t *data,
175     crypto_call_req_t *cr)
176 {
177 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
178 	kcf_context_t *kcf_ctx;
179 	kcf_provider_desc_t *pd;
180 	kcf_req_params_t params;
181 	int rv;
182 
183 	if ((ctx == NULL) ||
184 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
185 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
186 		return (CRYPTO_INVALID_CONTEXT);
187 	}
188 
189 	ASSERT(pd->pd_prov_type != CRYPTO_LOGICAL_PROVIDER);
190 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_UPDATE, ctx->cc_session, NULL,
191 	    NULL, data, NULL, NULL);
192 	rv = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
193 
194 	return (rv);
195 }
196 
197 /*
198  * See comments for crypto_digest_final().
199  */
200 int
crypto_sign_final(crypto_context_t context,crypto_data_t * signature,crypto_call_req_t * cr)201 crypto_sign_final(crypto_context_t context, crypto_data_t *signature,
202     crypto_call_req_t *cr)
203 {
204 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
205 	kcf_context_t *kcf_ctx;
206 	kcf_provider_desc_t *pd;
207 	int rv;
208 	kcf_req_params_t params;
209 
210 	if ((ctx == NULL) ||
211 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
212 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
213 		return (CRYPTO_INVALID_CONTEXT);
214 	}
215 
216 	ASSERT(pd->pd_prov_type != CRYPTO_LOGICAL_PROVIDER);
217 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_FINAL, ctx->cc_session, NULL,
218 	    NULL, NULL, signature, NULL);
219 	rv = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
220 
221 	/* Release the hold done in kcf_new_ctx() during init step. */
222 	KCF_CONTEXT_COND_RELEASE(rv, kcf_ctx);
223 	return (rv);
224 }
225 
226 int
crypto_sign_prov(crypto_provider_t provider,crypto_session_id_t sid,crypto_mechanism_t * mech,crypto_key_t * key,crypto_data_t * data,crypto_ctx_template_t tmpl,crypto_data_t * signature,crypto_call_req_t * crq)227 crypto_sign_prov(crypto_provider_t provider, crypto_session_id_t sid,
228     crypto_mechanism_t *mech, crypto_key_t *key, crypto_data_t *data,
229     crypto_ctx_template_t tmpl, crypto_data_t *signature,
230     crypto_call_req_t *crq)
231 {
232 	kcf_req_params_t params;
233 	kcf_provider_desc_t *pd = provider;
234 	kcf_provider_desc_t *real_provider = pd;
235 	int rv;
236 
237 	ASSERT(KCF_PROV_REFHELD(pd));
238 
239 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
240 		rv = kcf_get_hardware_provider(mech->cm_type, key,
241 		    CRYPTO_MECH_INVALID, NULL, pd, &real_provider,
242 		    CRYPTO_FG_SIGN_ATOMIC);
243 
244 		if (rv != CRYPTO_SUCCESS)
245 			return (rv);
246 	}
247 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_ATOMIC, sid, mech,
248 	    key, data, signature, tmpl);
249 	rv = kcf_submit_request(real_provider, NULL, crq, &params, B_FALSE);
250 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
251 		KCF_PROV_REFRELE(real_provider);
252 
253 	return (rv);
254 }
255 
256 static int
sign_sr_atomic_common(crypto_mechanism_t * mech,crypto_key_t * key,crypto_data_t * data,crypto_ctx_template_t tmpl,crypto_data_t * signature,crypto_call_req_t * crq,crypto_func_group_t fg)257 sign_sr_atomic_common(crypto_mechanism_t *mech, crypto_key_t *key,
258     crypto_data_t *data, crypto_ctx_template_t tmpl, crypto_data_t *signature,
259     crypto_call_req_t *crq, crypto_func_group_t fg)
260 {
261 	int error;
262 	kcf_mech_entry_t *me;
263 	kcf_provider_desc_t *pd;
264 	kcf_req_params_t params;
265 	kcf_prov_tried_t *list = NULL;
266 	kcf_ctx_template_t *ctx_tmpl;
267 	crypto_spi_ctx_template_t spi_ctx_tmpl = NULL;
268 
269 retry:
270 	/* The pd is returned held */
271 	if ((pd = kcf_get_mech_provider(mech->cm_type, key, &me, &error,
272 	    list, fg, data->cd_length)) == NULL) {
273 		if (list != NULL)
274 			kcf_free_triedlist(list);
275 		return (error);
276 	}
277 
278 	/*
279 	 * For SW providers, check the validity of the context template
280 	 * It is very rare that the generation number mis-matches, so
281 	 * it is acceptable to fail here, and let the consumer recover by
282 	 * freeing this tmpl and create a new one for the key and new SW
283 	 * provider.
284 	 */
285 	if ((pd->pd_prov_type == CRYPTO_SW_PROVIDER) &&
286 	    ((ctx_tmpl = (kcf_ctx_template_t *)tmpl) != NULL)) {
287 		if (ctx_tmpl->ct_generation != me->me_gen_swprov) {
288 			if (list != NULL)
289 				kcf_free_triedlist(list);
290 			KCF_PROV_REFRELE(pd);
291 			return (CRYPTO_OLD_CTX_TEMPLATE);
292 		} else {
293 			spi_ctx_tmpl = ctx_tmpl->ct_prov_tmpl;
294 		}
295 	}
296 
297 	/* The fast path for SW providers. */
298 	if (CHECK_FASTPATH(crq, pd)) {
299 		crypto_mechanism_t lmech;
300 
301 		lmech = *mech;
302 		KCF_SET_PROVIDER_MECHNUM(mech->cm_type, pd, &lmech);
303 		if (fg == CRYPTO_FG_SIGN_ATOMIC)
304 			error = KCF_PROV_SIGN_ATOMIC(pd, pd->pd_sid, &lmech,
305 			    key, data, spi_ctx_tmpl, signature,
306 			    KCF_SWFP_RHNDL(crq));
307 		else
308 			error = KCF_PROV_SIGN_RECOVER_ATOMIC(pd, pd->pd_sid,
309 			    &lmech, key, data, spi_ctx_tmpl, signature,
310 			    KCF_SWFP_RHNDL(crq));
311 		KCF_PROV_INCRSTATS(pd, error);
312 	} else {
313 		kcf_op_type_t op = ((fg == CRYPTO_FG_SIGN_ATOMIC) ?
314 		    KCF_OP_ATOMIC : KCF_OP_SIGN_RECOVER_ATOMIC);
315 
316 		KCF_WRAP_SIGN_OPS_PARAMS(&params, op, pd->pd_sid,
317 		    mech, key, data, signature, spi_ctx_tmpl);
318 
319 		/* no crypto context to carry between multiple parts. */
320 		error = kcf_submit_request(pd, NULL, crq, &params, B_FALSE);
321 	}
322 
323 	if (error != CRYPTO_SUCCESS && error != CRYPTO_QUEUED &&
324 	    IS_RECOVERABLE(error)) {
325 		/* Add pd to the linked list of providers tried. */
326 		if (kcf_insert_triedlist(&list, pd, KCF_KMFLAG(crq)) != NULL)
327 			goto retry;
328 	}
329 
330 	if (list != NULL)
331 		kcf_free_triedlist(list);
332 
333 	KCF_PROV_REFRELE(pd);
334 	return (error);
335 }
336 
337 int
crypto_sign(crypto_mechanism_t * mech,crypto_key_t * key,crypto_data_t * data,crypto_ctx_template_t tmpl,crypto_data_t * signature,crypto_call_req_t * crq)338 crypto_sign(crypto_mechanism_t *mech, crypto_key_t *key, crypto_data_t *data,
339     crypto_ctx_template_t tmpl, crypto_data_t *signature,
340     crypto_call_req_t *crq)
341 {
342 	return (sign_sr_atomic_common(mech, key, data, tmpl, signature, crq,
343 	    CRYPTO_FG_SIGN_ATOMIC));
344 }
345 
346 int
crypto_sign_recover_prov(crypto_provider_t provider,crypto_session_id_t sid,crypto_mechanism_t * mech,crypto_key_t * key,crypto_data_t * data,crypto_ctx_template_t tmpl,crypto_data_t * signature,crypto_call_req_t * crq)347 crypto_sign_recover_prov(crypto_provider_t provider, crypto_session_id_t sid,
348     crypto_mechanism_t *mech, crypto_key_t *key, crypto_data_t *data,
349     crypto_ctx_template_t tmpl, crypto_data_t *signature,
350     crypto_call_req_t *crq)
351 {
352 	kcf_req_params_t params;
353 	kcf_provider_desc_t *pd = provider;
354 	kcf_provider_desc_t *real_provider = pd;
355 	int rv;
356 
357 	ASSERT(KCF_PROV_REFHELD(pd));
358 
359 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
360 		rv = kcf_get_hardware_provider(mech->cm_type, key,
361 		    CRYPTO_MECH_INVALID, NULL, pd, &real_provider,
362 		    CRYPTO_FG_SIGN_RECOVER_ATOMIC);
363 
364 		if (rv != CRYPTO_SUCCESS)
365 			return (rv);
366 	}
367 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_SIGN_RECOVER_ATOMIC, sid, mech,
368 	    key, data, signature, tmpl);
369 	rv = kcf_submit_request(real_provider, NULL, crq, &params, B_FALSE);
370 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
371 		KCF_PROV_REFRELE(real_provider);
372 
373 	return (rv);
374 }
375 
376 int
crypto_sign_recover(crypto_mechanism_t * mech,crypto_key_t * key,crypto_data_t * data,crypto_ctx_template_t tmpl,crypto_data_t * signature,crypto_call_req_t * crq)377 crypto_sign_recover(crypto_mechanism_t *mech, crypto_key_t *key,
378     crypto_data_t *data, crypto_ctx_template_t tmpl, crypto_data_t *signature,
379     crypto_call_req_t *crq)
380 {
381 	return (sign_sr_atomic_common(mech, key, data, tmpl, signature, crq,
382 	    CRYPTO_FG_SIGN_RECOVER_ATOMIC));
383 }
384 
385 int
crypto_sign_recover_init_prov(crypto_provider_t provider,crypto_session_id_t sid,crypto_mechanism_t * mech,crypto_key_t * key,crypto_ctx_template_t tmpl,crypto_context_t * ctxp,crypto_call_req_t * crq)386 crypto_sign_recover_init_prov(crypto_provider_t provider,
387     crypto_session_id_t sid, crypto_mechanism_t *mech, crypto_key_t *key,
388     crypto_ctx_template_t tmpl, crypto_context_t *ctxp, crypto_call_req_t *crq)
389 {
390 	int rv;
391 	crypto_ctx_t *ctx;
392 	kcf_req_params_t params;
393 	kcf_provider_desc_t *pd = provider;
394 	kcf_provider_desc_t *real_provider = pd;
395 
396 	ASSERT(KCF_PROV_REFHELD(pd));
397 
398 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER) {
399 		rv = kcf_get_hardware_provider(mech->cm_type, key,
400 		    CRYPTO_MECH_INVALID, NULL, pd, &real_provider,
401 		    CRYPTO_FG_SIGN_RECOVER);
402 
403 		if (rv != CRYPTO_SUCCESS)
404 			return (rv);
405 	}
406 
407 	/* Allocate and initialize the canonical context */
408 	if ((ctx = kcf_new_ctx(crq, real_provider, sid)) == NULL) {
409 		if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
410 			KCF_PROV_REFRELE(real_provider);
411 		return (CRYPTO_HOST_MEMORY);
412 	}
413 
414 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_SIGN_RECOVER_INIT, sid, mech,
415 	    key, NULL, NULL, tmpl);
416 	rv = kcf_submit_request(real_provider, ctx, crq, &params, B_FALSE);
417 	if (pd->pd_prov_type == CRYPTO_LOGICAL_PROVIDER)
418 		KCF_PROV_REFRELE(real_provider);
419 
420 	if ((rv == CRYPTO_SUCCESS) || (rv == CRYPTO_QUEUED))
421 		*ctxp = (crypto_context_t)ctx;
422 	else {
423 		/* Release the hold done in kcf_new_ctx(). */
424 		KCF_CONTEXT_REFRELE((kcf_context_t *)ctx->cc_framework_private);
425 	}
426 
427 	return (rv);
428 }
429 
430 int
crypto_sign_recover_single(crypto_context_t context,crypto_data_t * data,crypto_data_t * signature,crypto_call_req_t * cr)431 crypto_sign_recover_single(crypto_context_t context, crypto_data_t *data,
432     crypto_data_t *signature, crypto_call_req_t *cr)
433 {
434 	crypto_ctx_t *ctx = (crypto_ctx_t *)context;
435 	kcf_context_t *kcf_ctx;
436 	kcf_provider_desc_t *pd;
437 	int error;
438 	kcf_req_params_t params;
439 
440 	if ((ctx == NULL) ||
441 	    ((kcf_ctx = (kcf_context_t *)ctx->cc_framework_private) == NULL) ||
442 	    ((pd = kcf_ctx->kc_prov_desc) == NULL)) {
443 		return (CRYPTO_INVALID_CONTEXT);
444 	}
445 
446 	KCF_WRAP_SIGN_OPS_PARAMS(&params, KCF_OP_SIGN_RECOVER, 0, NULL,
447 	    NULL, data, signature, NULL);
448 	error = kcf_submit_request(pd, ctx, cr, &params, B_FALSE);
449 
450 	/* Release the hold done in kcf_new_ctx() during init step. */
451 	KCF_CONTEXT_COND_RELEASE(error, kcf_ctx);
452 	return (error);
453 }
454