2 * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/core_names.h>
11 #include "internal/cryptlib.h"
12 #include "internal/nelem.h"
13 #include "crypto/evp.h"
14 #include "crypto/asn1.h"
15 #include "internal/core.h"
16 #include "internal/provider.h"
17 #include "evp_local.h"
19 struct import_data_st {
21 void *(*importfn)(const EVP_KEYMGMT *keymgmt, const OSSL_PARAM params[]);
27 static int try_import(const OSSL_PARAM params[], void *arg)
29 struct import_data_st *data = arg;
31 data->provdata = data->importfn(data->provctx, params);
32 return data->provdata != NULL;
35 void *evp_keymgmt_export_to_provider(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt,
36 int want_domainparams)
38 void *provdata = NULL;
42 * If there is an underlying legacy key and it has changed, invalidate
43 * the cache of provider keys.
45 if (pk->pkey.ptr != NULL) {
47 * If there is no dirty counter, this key can't be used with
50 if (pk->ameth->dirty_cnt == NULL)
53 if (pk->ameth->dirty_cnt(pk) != pk->dirty_cnt_copy)
54 evp_keymgmt_clear_pkey_cache(pk);
58 * See if we have exported to this provider already.
59 * If we have, return immediately.
62 i < OSSL_NELEM(pk->pkeys) && pk->pkeys[i].keymgmt != NULL;
64 if (keymgmt == pk->pkeys[i].keymgmt
65 && want_domainparams == pk->pkeys[i].domainparams)
66 return pk->pkeys[i].provdata;
69 if (pk->pkey.ptr != NULL) {
70 /* There is a legacy key, try to export that one to the provider */
72 /* If the legacy key doesn't have an export function, give up */
73 if (pk->ameth->export_to == NULL)
76 /* Otherwise, simply use it. */
77 provdata = pk->ameth->export_to(pk, keymgmt, want_domainparams);
79 /* Synchronize the dirty count, but only if we exported successfully */
81 pk->dirty_cnt_copy = pk->ameth->dirty_cnt(pk);
85 * Here, there is no legacy key, so we look at the already cached
86 * provider keys, and import from the first that supports it
87 * (i.e. use its export function), and export the imported data to
91 /* Setup for the export callback */
92 struct import_data_st import_data;
94 import_data.importfn =
96 ? evp_keymgmt_importdomparams
97 : evp_keymgmt_importkey;
98 import_data.provdata = NULL;
101 * If the given keymgmt doesn't have an import function, give up
103 if (import_data.importfn == NULL)
106 for (j = 0; j < i && pk->pkeys[j].keymgmt != NULL; j++) {
107 int (*exportfn)(const EVP_KEYMGMT *keymgmt, void *provdata,
108 OSSL_CALLBACK *cb, void *cbarg) =
110 ? evp_keymgmt_exportdomparams
111 : evp_keymgmt_exportkey;
113 if (exportfn != NULL) {
114 import_data.provctx =
115 ossl_provider_ctx(EVP_KEYMGMT_provider(keymgmt));
118 * The export function calls the callback (try_import), which
119 * does the import for us.
120 * Even though we got a success return, we double check that
121 * we actually got something, just in case some implementation
122 * forgets to check the return value.
125 if (exportfn(pk->pkeys[j].keymgmt, pk->pkeys[j].provdata,
126 &try_import, &import_data)
127 && (provdata = import_data.provdata) != NULL)
134 * TODO(3.0) Right now, we assume we have ample space. We will
135 * have to think about a cache aging scheme, though, if |i| indexes
138 if (!ossl_assert(i < OSSL_NELEM(pk->pkeys)))
141 evp_keymgmt_cache_pkey(pk, i, keymgmt, provdata, want_domainparams);
146 void evp_keymgmt_clear_pkey_cache(EVP_PKEY *pk)
152 i < OSSL_NELEM(pk->pkeys) && pk->pkeys[i].keymgmt != NULL;
154 EVP_KEYMGMT *keymgmt = pk->pkeys[i].keymgmt;
155 void *provdata = pk->pkeys[i].provdata;
157 pk->pkeys[i].keymgmt = NULL;
158 pk->pkeys[i].provdata = NULL;
159 if (pk->pkeys[i].domainparams)
160 evp_keymgmt_freedomparams(keymgmt, provdata);
162 evp_keymgmt_freekey(keymgmt, provdata);
163 EVP_KEYMGMT_free(keymgmt);
168 pk->cache.security_bits = 0;
172 void evp_keymgmt_cache_pkey(EVP_PKEY *pk, size_t index, EVP_KEYMGMT *keymgmt,
173 void *provdata, int domainparams)
175 if (provdata != NULL) {
176 EVP_KEYMGMT_up_ref(keymgmt);
177 pk->pkeys[index].keymgmt = keymgmt;
178 pk->pkeys[index].provdata = provdata;
179 pk->pkeys[index].domainparams = domainparams;
182 * Cache information about the domain parameters or key. Only needed
183 * for the "original" provider side key.
185 * This services functions like EVP_PKEY_size, EVP_PKEY_bits, etc
190 int security_bits = 0;
192 OSSL_PARAM params[4];
194 params[0] = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_BITS, &bits);
195 params[1] = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_SECURITY_BITS,
197 params[2] = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_MAX_SIZE, &size);
198 params[3] = OSSL_PARAM_construct_end();
200 ? evp_keymgmt_get_domparam_params(keymgmt, provdata, params)
201 : evp_keymgmt_get_key_params(keymgmt, provdata, params);
203 pk->cache.size = size;
204 pk->cache.bits = bits;
205 pk->cache.security_bits = security_bits;
211 void *evp_keymgmt_fromdata(EVP_PKEY *target, EVP_KEYMGMT *keymgmt,
212 const OSSL_PARAM params[], int domainparams)
214 void *provdata = domainparams
215 ? evp_keymgmt_importdomparams(keymgmt, params)
216 : evp_keymgmt_importkey(keymgmt, params);
218 evp_keymgmt_clear_pkey_cache(target);
219 evp_keymgmt_cache_pkey(target, 0, keymgmt, provdata, domainparams);
224 /* internal functions */
225 /* TODO(3.0) decide if these should be public or internal */
226 void *evp_keymgmt_importdomparams(const EVP_KEYMGMT *keymgmt,
227 const OSSL_PARAM params[])
229 void *provctx = ossl_provider_ctx(EVP_KEYMGMT_provider(keymgmt));
231 return keymgmt->importdomparams(provctx, params);
234 void *evp_keymgmt_gendomparams(const EVP_KEYMGMT *keymgmt,
235 const OSSL_PARAM params[])
237 void *provctx = ossl_provider_ctx(EVP_KEYMGMT_provider(keymgmt));
239 return keymgmt->gendomparams(provctx, params);
242 void evp_keymgmt_freedomparams(const EVP_KEYMGMT *keymgmt,
245 keymgmt->freedomparams(provdomparams);
248 int evp_keymgmt_exportdomparams(const EVP_KEYMGMT *keymgmt,
250 OSSL_CALLBACK *param_cb, void *cbarg)
252 return keymgmt->exportdomparams(provdomparams, param_cb, cbarg);
255 const OSSL_PARAM *evp_keymgmt_importdomparam_types(const EVP_KEYMGMT *keymgmt)
257 return keymgmt->importdomparam_types();
261 * TODO(v3.0) investigate if we need this function. 'openssl provider' may
264 const OSSL_PARAM *evp_keymgmt_exportdomparam_types(const EVP_KEYMGMT *keymgmt)
266 return keymgmt->exportdomparam_types();
269 int evp_keymgmt_get_domparam_params(const EVP_KEYMGMT *keymgmt,
270 void *provdomparams, OSSL_PARAM params[])
272 if (keymgmt->get_domparam_params == NULL)
274 return keymgmt->get_domparam_params(provdomparams, params);
278 evp_keymgmt_gettable_domparam_params(const EVP_KEYMGMT *keymgmt)
280 if (keymgmt->gettable_domparam_params == NULL)
282 return keymgmt->gettable_domparam_params();
286 void *evp_keymgmt_importkey(const EVP_KEYMGMT *keymgmt,
287 const OSSL_PARAM params[])
289 void *provctx = ossl_provider_ctx(EVP_KEYMGMT_provider(keymgmt));
291 return keymgmt->importkey(provctx, params);
294 void *evp_keymgmt_genkey(const EVP_KEYMGMT *keymgmt, void *domparams,
295 const OSSL_PARAM params[])
297 void *provctx = ossl_provider_ctx(EVP_KEYMGMT_provider(keymgmt));
299 return keymgmt->genkey(provctx, domparams, params);
302 void *evp_keymgmt_loadkey(const EVP_KEYMGMT *keymgmt,
303 void *id, size_t idlen)
305 void *provctx = ossl_provider_ctx(EVP_KEYMGMT_provider(keymgmt));
307 return keymgmt->loadkey(provctx, id, idlen);
310 void evp_keymgmt_freekey(const EVP_KEYMGMT *keymgmt, void *provkey)
312 keymgmt->freekey(provkey);
315 int evp_keymgmt_exportkey(const EVP_KEYMGMT *keymgmt, void *provkey,
316 OSSL_CALLBACK *param_cb, void *cbarg)
318 return keymgmt->exportkey(provkey, param_cb, cbarg);
321 const OSSL_PARAM *evp_keymgmt_importkey_types(const EVP_KEYMGMT *keymgmt)
323 return keymgmt->importkey_types();
327 * TODO(v3.0) investigate if we need this function. 'openssl provider' may
330 const OSSL_PARAM *evp_keymgmt_exportkey_types(const EVP_KEYMGMT *keymgmt)
332 return keymgmt->exportkey_types();
335 int evp_keymgmt_get_key_params(const EVP_KEYMGMT *keymgmt,
336 void *provkey, OSSL_PARAM params[])
338 if (keymgmt->get_key_params == NULL)
340 return keymgmt->get_key_params(provkey, params);
343 const OSSL_PARAM *evp_keymgmt_gettable_key_params(const EVP_KEYMGMT *keymgmt)
345 if (keymgmt->gettable_key_params == NULL)
347 return keymgmt->gettable_key_params();
350 int evp_keymgmt_validate_domparams(const EVP_KEYMGMT *keymgmt, void *provkey)
352 /* if domainparams are not supported - then pass */
353 if (keymgmt->validatedomparams == NULL)
355 return keymgmt->validatedomparams(provkey);
358 int evp_keymgmt_validate_public(const EVP_KEYMGMT *keymgmt, void *provkey)
360 return keymgmt->validatepublic(provkey);
363 int evp_keymgmt_validate_private(const EVP_KEYMGMT *keymgmt, void *provkey)
365 return keymgmt->validateprivate(provkey);
368 int evp_keymgmt_validate_pairwise(const EVP_KEYMGMT *keymgmt, void *provkey)
370 return keymgmt->validatepairwise(provkey);