1/*
2 * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10/*
11 * RSA low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14#include "internal/deprecated.h"
15
16#include <openssl/crypto.h>
17#include <openssl/evp.h>
18#include <openssl/core_dispatch.h>
19#include <openssl/core_names.h>
20#include <openssl/rsa.h>
21#include <openssl/params.h>
22#include <openssl/err.h>
23#include <openssl/proverr.h>
24/* Just for SSL_MAX_MASTER_KEY_LENGTH */
25#include <openssl/prov_ssl.h>
26#include "internal/constant_time.h"
27#include "internal/sizes.h"
28#include "crypto/rsa.h"
29#include "prov/provider_ctx.h"
30#include "prov/implementations.h"
31#include "prov/providercommon.h"
32#include "prov/securitycheck.h"
33
34#include <stdlib.h>
35
36static OSSL_FUNC_asym_cipher_newctx_fn rsa_newctx;
37static OSSL_FUNC_asym_cipher_encrypt_init_fn rsa_encrypt_init;
38static OSSL_FUNC_asym_cipher_encrypt_fn rsa_encrypt;
39static OSSL_FUNC_asym_cipher_decrypt_init_fn rsa_decrypt_init;
40static OSSL_FUNC_asym_cipher_decrypt_fn rsa_decrypt;
41static OSSL_FUNC_asym_cipher_freectx_fn rsa_freectx;
42static OSSL_FUNC_asym_cipher_dupctx_fn rsa_dupctx;
43static OSSL_FUNC_asym_cipher_get_ctx_params_fn rsa_get_ctx_params;
44static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn rsa_gettable_ctx_params;
45static OSSL_FUNC_asym_cipher_set_ctx_params_fn rsa_set_ctx_params;
46static OSSL_FUNC_asym_cipher_settable_ctx_params_fn rsa_settable_ctx_params;
47
48static OSSL_ITEM padding_item[] = {
49    { RSA_PKCS1_PADDING,        OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
50    { RSA_NO_PADDING,           OSSL_PKEY_RSA_PAD_MODE_NONE },
51    { RSA_PKCS1_OAEP_PADDING,   OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
52    { RSA_PKCS1_OAEP_PADDING,   "oeap"   },
53    { RSA_X931_PADDING,         OSSL_PKEY_RSA_PAD_MODE_X931 },
54    { 0,                        NULL     }
55};
56
57/*
58 * What's passed as an actual key is defined by the KEYMGMT interface.
59 * We happen to know that our KEYMGMT simply passes RSA structures, so
60 * we use that here too.
61 */
62
63typedef struct {
64    OSSL_LIB_CTX *libctx;
65    RSA *rsa;
66    int pad_mode;
67    int operation;
68    /* OAEP message digest */
69    EVP_MD *oaep_md;
70    /* message digest for MGF1 */
71    EVP_MD *mgf1_md;
72    /* OAEP label */
73    unsigned char *oaep_label;
74    size_t oaep_labellen;
75    /* TLS padding */
76    unsigned int client_version;
77    unsigned int alt_version;
78} PROV_RSA_CTX;
79
80static void *rsa_newctx(void *provctx)
81{
82    PROV_RSA_CTX *prsactx;
83
84    if (!ossl_prov_is_running())
85        return NULL;
86    prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
87    if (prsactx == NULL)
88        return NULL;
89    prsactx->libctx = PROV_LIBCTX_OF(provctx);
90
91    return prsactx;
92}
93
94static int rsa_init(void *vprsactx, void *vrsa, const OSSL_PARAM params[],
95                    int operation)
96{
97    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
98
99    if (!ossl_prov_is_running() || prsactx == NULL || vrsa == NULL)
100        return 0;
101
102    if (!ossl_rsa_check_key(prsactx->libctx, vrsa, operation))
103        return 0;
104
105    if (!RSA_up_ref(vrsa))
106        return 0;
107    RSA_free(prsactx->rsa);
108    prsactx->rsa = vrsa;
109    prsactx->operation = operation;
110
111    switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
112    case RSA_FLAG_TYPE_RSA:
113        prsactx->pad_mode = RSA_PKCS1_PADDING;
114        break;
115    default:
116        /* This should not happen due to the check above */
117        ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
118        return 0;
119    }
120    return rsa_set_ctx_params(prsactx, params);
121}
122
123static int rsa_encrypt_init(void *vprsactx, void *vrsa,
124                            const OSSL_PARAM params[])
125{
126    return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT);
127}
128
129static int rsa_decrypt_init(void *vprsactx, void *vrsa,
130                            const OSSL_PARAM params[])
131{
132    return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_DECRYPT);
133}
134
135static int rsa_encrypt(void *vprsactx, unsigned char *out, size_t *outlen,
136                       size_t outsize, const unsigned char *in, size_t inlen)
137{
138    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
139    int ret;
140
141    if (!ossl_prov_is_running())
142        return 0;
143
144    if (out == NULL) {
145        size_t len = RSA_size(prsactx->rsa);
146
147        if (len == 0) {
148            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
149            return 0;
150        }
151        *outlen = len;
152        return 1;
153    }
154
155    if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
156        int rsasize = RSA_size(prsactx->rsa);
157        unsigned char *tbuf;
158
159        if ((tbuf = OPENSSL_malloc(rsasize)) == NULL) {
160            ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
161            return 0;
162        }
163        if (prsactx->oaep_md == NULL) {
164            prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
165            if (prsactx->oaep_md == NULL) {
166                OPENSSL_free(tbuf);
167                ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
168                return 0;
169            }
170        }
171        ret =
172            ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
173                                                    rsasize, in, inlen,
174                                                    prsactx->oaep_label,
175                                                    prsactx->oaep_labellen,
176                                                    prsactx->oaep_md,
177                                                    prsactx->mgf1_md);
178
179        if (!ret) {
180            OPENSSL_free(tbuf);
181            return 0;
182        }
183        ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
184                                 RSA_NO_PADDING);
185        OPENSSL_free(tbuf);
186    } else {
187        ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
188                                 prsactx->pad_mode);
189    }
190    /* A ret value of 0 is not an error */
191    if (ret < 0)
192        return ret;
193    *outlen = ret;
194    return 1;
195}
196
197static int rsa_decrypt(void *vprsactx, unsigned char *out, size_t *outlen,
198                       size_t outsize, const unsigned char *in, size_t inlen)
199{
200    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
201    int ret;
202    size_t len = RSA_size(prsactx->rsa);
203
204    if (!ossl_prov_is_running())
205        return 0;
206
207    if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
208        if (out == NULL) {
209            *outlen = SSL_MAX_MASTER_KEY_LENGTH;
210            return 1;
211        }
212        if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
213            ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
214            return 0;
215        }
216    } else {
217        if (out == NULL) {
218            if (len == 0) {
219                ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
220                return 0;
221            }
222            *outlen = len;
223            return 1;
224        }
225
226        if (outsize < len) {
227            ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
228            return 0;
229        }
230    }
231
232    if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
233            || prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
234        unsigned char *tbuf;
235
236        if ((tbuf = OPENSSL_malloc(len)) == NULL) {
237            ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
238            return 0;
239        }
240        ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
241                                  RSA_NO_PADDING);
242        /*
243         * With no padding then, on success ret should be len, otherwise an
244         * error occurred (non-constant time)
245         */
246        if (ret != (int)len) {
247            OPENSSL_free(tbuf);
248            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
249            return 0;
250        }
251        if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
252            if (prsactx->oaep_md == NULL) {
253                prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
254                if (prsactx->oaep_md == NULL) {
255                    OPENSSL_free(tbuf);
256                    ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
257                    return 0;
258                }
259            }
260            ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
261                                                    len, len,
262                                                    prsactx->oaep_label,
263                                                    prsactx->oaep_labellen,
264                                                    prsactx->oaep_md,
265                                                    prsactx->mgf1_md);
266        } else {
267            /* RSA_PKCS1_WITH_TLS_PADDING */
268            if (prsactx->client_version <= 0) {
269                ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
270                OPENSSL_free(tbuf);
271                return 0;
272            }
273            ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
274                        prsactx->libctx, out, outsize, tbuf, len,
275                        prsactx->client_version, prsactx->alt_version);
276        }
277        OPENSSL_free(tbuf);
278    } else {
279        ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa,
280                                  prsactx->pad_mode);
281    }
282    *outlen = constant_time_select_s(constant_time_msb_s(ret), *outlen, ret);
283    ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
284    return ret;
285}
286
287static void rsa_freectx(void *vprsactx)
288{
289    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
290
291    RSA_free(prsactx->rsa);
292
293    EVP_MD_free(prsactx->oaep_md);
294    EVP_MD_free(prsactx->mgf1_md);
295    OPENSSL_free(prsactx->oaep_label);
296
297    OPENSSL_free(prsactx);
298}
299
300static void *rsa_dupctx(void *vprsactx)
301{
302    PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx;
303    PROV_RSA_CTX *dstctx;
304
305    if (!ossl_prov_is_running())
306        return NULL;
307
308    dstctx = OPENSSL_zalloc(sizeof(*srcctx));
309    if (dstctx == NULL)
310        return NULL;
311
312    *dstctx = *srcctx;
313    if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
314        OPENSSL_free(dstctx);
315        return NULL;
316    }
317
318    if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
319        RSA_free(dstctx->rsa);
320        OPENSSL_free(dstctx);
321        return NULL;
322    }
323
324    if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
325        RSA_free(dstctx->rsa);
326        EVP_MD_free(dstctx->oaep_md);
327        OPENSSL_free(dstctx);
328        return NULL;
329    }
330
331    return dstctx;
332}
333
334static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
335{
336    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
337    OSSL_PARAM *p;
338
339    if (prsactx == NULL)
340        return 0;
341
342    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
343    if (p != NULL)
344        switch (p->data_type) {
345        case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
346            if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
347                return 0;
348            break;
349        case OSSL_PARAM_UTF8_STRING:
350            {
351                int i;
352                const char *word = NULL;
353
354                for (i = 0; padding_item[i].id != 0; i++) {
355                    if (prsactx->pad_mode == (int)padding_item[i].id) {
356                        word = padding_item[i].ptr;
357                        break;
358                    }
359                }
360
361                if (word != NULL) {
362                    if (!OSSL_PARAM_set_utf8_string(p, word))
363                        return 0;
364                } else {
365                    ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
366                }
367            }
368            break;
369        default:
370            return 0;
371        }
372
373    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
374    if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
375                                                    ? ""
376                                                    : EVP_MD_get0_name(prsactx->oaep_md)))
377        return 0;
378
379    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
380    if (p != NULL) {
381        EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
382                                                   : prsactx->mgf1_md;
383
384        if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
385                                           ? ""
386                                           : EVP_MD_get0_name(mgf1_md)))
387        return 0;
388    }
389
390    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
391    if (p != NULL &&
392        !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label,
393                                  prsactx->oaep_labellen))
394        return 0;
395
396    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
397    if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
398        return 0;
399
400    p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
401    if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
402        return 0;
403
404    return 1;
405}
406
407static const OSSL_PARAM known_gettable_ctx_params[] = {
408    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
409    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
410    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
411    OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
412                    NULL, 0),
413    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
414    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
415    OSSL_PARAM_END
416};
417
418static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *vprsactx,
419                                                 ossl_unused void *provctx)
420{
421    return known_gettable_ctx_params;
422}
423
424static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
425{
426    PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
427    const OSSL_PARAM *p;
428    char mdname[OSSL_MAX_NAME_SIZE];
429    char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
430    char *str = NULL;
431
432    if (prsactx == NULL)
433        return 0;
434    if (params == NULL)
435        return 1;
436
437    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
438    if (p != NULL) {
439        str = mdname;
440        if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
441            return 0;
442
443        p = OSSL_PARAM_locate_const(params,
444                                    OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
445        if (p != NULL) {
446            str = mdprops;
447            if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
448                return 0;
449        }
450
451        EVP_MD_free(prsactx->oaep_md);
452        prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
453
454        if (prsactx->oaep_md == NULL)
455            return 0;
456    }
457
458    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
459    if (p != NULL) {
460        int pad_mode = 0;
461
462        switch (p->data_type) {
463        case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
464            if (!OSSL_PARAM_get_int(p, &pad_mode))
465                return 0;
466            break;
467        case OSSL_PARAM_UTF8_STRING:
468            {
469                int i;
470
471                if (p->data == NULL)
472                    return 0;
473
474                for (i = 0; padding_item[i].id != 0; i++) {
475                    if (strcmp(p->data, padding_item[i].ptr) == 0) {
476                        pad_mode = padding_item[i].id;
477                        break;
478                    }
479                }
480            }
481            break;
482        default:
483            return 0;
484        }
485
486        /*
487         * PSS padding is for signatures only so is not compatible with
488         * asymmetric cipher use.
489         */
490        if (pad_mode == RSA_PKCS1_PSS_PADDING)
491            return 0;
492        if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
493            prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
494            if (prsactx->oaep_md == NULL)
495                return 0;
496        }
497        prsactx->pad_mode = pad_mode;
498    }
499
500    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
501    if (p != NULL) {
502        str = mdname;
503        if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
504            return 0;
505
506        p = OSSL_PARAM_locate_const(params,
507                                    OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
508        if (p != NULL) {
509            str = mdprops;
510            if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
511                return 0;
512        } else {
513            str = NULL;
514        }
515
516        EVP_MD_free(prsactx->mgf1_md);
517        prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
518
519        if (prsactx->mgf1_md == NULL)
520            return 0;
521    }
522
523    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
524    if (p != NULL) {
525        void *tmp_label = NULL;
526        size_t tmp_labellen;
527
528        if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
529            return 0;
530        OPENSSL_free(prsactx->oaep_label);
531        prsactx->oaep_label = (unsigned char *)tmp_label;
532        prsactx->oaep_labellen = tmp_labellen;
533    }
534
535    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
536    if (p != NULL) {
537        unsigned int client_version;
538
539        if (!OSSL_PARAM_get_uint(p, &client_version))
540            return 0;
541        prsactx->client_version = client_version;
542    }
543
544    p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
545    if (p != NULL) {
546        unsigned int alt_version;
547
548        if (!OSSL_PARAM_get_uint(p, &alt_version))
549            return 0;
550        prsactx->alt_version = alt_version;
551    }
552
553    return 1;
554}
555
556static const OSSL_PARAM known_settable_ctx_params[] = {
557    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
558    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS, NULL, 0),
559    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
560    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
561    OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
562    OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
563    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
564    OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
565    OSSL_PARAM_END
566};
567
568static const OSSL_PARAM *rsa_settable_ctx_params(ossl_unused void *vprsactx,
569                                                 ossl_unused void *provctx)
570{
571    return known_settable_ctx_params;
572}
573
574const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
575    { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
576    { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
577    { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
578    { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
579    { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
580    { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
581    { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
582    { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
583      (void (*)(void))rsa_get_ctx_params },
584    { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
585      (void (*)(void))rsa_gettable_ctx_params },
586    { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
587      (void (*)(void))rsa_set_ctx_params },
588    { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
589      (void (*)(void))rsa_settable_ctx_params },
590    { 0, NULL }
591};
592