2 * Copyright 1995-2018 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
11 # define OPENSSL_RSA_H
14 # include <openssl/macros.h>
19 # include <openssl/opensslconf.h>
21 # ifndef OPENSSL_NO_RSA
22 # include <openssl/asn1.h>
23 # include <openssl/bio.h>
24 # include <openssl/crypto.h>
25 # include <openssl/types.h>
26 # if !OPENSSL_API_1_1_0
27 # include <openssl/bn.h>
29 # include <openssl/rsaerr.h>
30 # include <openssl/safestack.h>
36 /* The types RSA and RSA_METHOD are defined in ossl_typ.h */
38 # ifndef OPENSSL_RSA_MAX_MODULUS_BITS
39 # define OPENSSL_RSA_MAX_MODULUS_BITS 16384
42 # define OPENSSL_RSA_FIPS_MIN_MODULUS_BITS 1024
44 # ifndef OPENSSL_RSA_SMALL_MODULUS_BITS
45 # define OPENSSL_RSA_SMALL_MODULUS_BITS 3072
47 # ifndef OPENSSL_RSA_MAX_PUBEXP_BITS
49 /* exponent limit enforced for "large" modulus only */
50 # define OPENSSL_RSA_MAX_PUBEXP_BITS 64
54 # define RSA_F4 0x10001L
56 /* based on RFC 8017 appendix A.1.2 */
57 # define RSA_ASN1_VERSION_DEFAULT 0
58 # define RSA_ASN1_VERSION_MULTI 1
60 # define RSA_DEFAULT_PRIME_NUM 2
62 # define RSA_METHOD_FLAG_NO_CHECK 0x0001/* don't check pub/private
65 # define RSA_FLAG_CACHE_PUBLIC 0x0002
66 # define RSA_FLAG_CACHE_PRIVATE 0x0004
67 # define RSA_FLAG_BLINDING 0x0008
68 # define RSA_FLAG_THREAD_SAFE 0x0010
70 * This flag means the private key operations will be handled by rsa_mod_exp
71 * and that they do not depend on the private key components being present:
72 * for example a key stored in external hardware. Without this flag
73 * bn_mod_exp gets called when private key components are absent.
75 # define RSA_FLAG_EXT_PKEY 0x0020
78 * new with 0.9.6j and 0.9.7b; the built-in
79 * RSA implementation now uses blinding by
80 * default (ignoring RSA_FLAG_BLINDING),
81 * but other engines might not need it
83 # define RSA_FLAG_NO_BLINDING 0x0080
84 # if !OPENSSL_API_1_1_0
86 * Does nothing. Previously this switched off constant time behaviour.
88 # define RSA_FLAG_NO_CONSTTIME 0x0000
90 # if !OPENSSL_API_0_9_8
91 /* deprecated name for the flag*/
93 * new with 0.9.7h; the built-in RSA
94 * implementation now uses constant time
95 * modular exponentiation for secret exponents
96 * by default. This flag causes the
97 * faster variable sliding window method to
98 * be used for all exponents.
100 # define RSA_FLAG_NO_EXP_CONSTTIME RSA_FLAG_NO_CONSTTIME
103 # define EVP_PKEY_CTX_set_rsa_padding(ctx, pad) \
104 RSA_pkey_ctx_ctrl(ctx, -1, EVP_PKEY_CTRL_RSA_PADDING, pad, NULL)
106 # define EVP_PKEY_CTX_get_rsa_padding(ctx, ppad) \
107 RSA_pkey_ctx_ctrl(ctx, -1, EVP_PKEY_CTRL_GET_RSA_PADDING, 0, ppad)
109 # define EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, len) \
110 RSA_pkey_ctx_ctrl(ctx, (EVP_PKEY_OP_SIGN|EVP_PKEY_OP_VERIFY), \
111 EVP_PKEY_CTRL_RSA_PSS_SALTLEN, len, NULL)
112 /* Salt length matches digest */
113 # define RSA_PSS_SALTLEN_DIGEST -1
114 /* Verify only: auto detect salt length */
115 # define RSA_PSS_SALTLEN_AUTO -2
116 /* Set salt length to maximum possible */
117 # define RSA_PSS_SALTLEN_MAX -3
118 /* Old compatible max salt length for sign only */
119 # define RSA_PSS_SALTLEN_MAX_SIGN -2
121 # define EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(ctx, len) \
122 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, EVP_PKEY_OP_KEYGEN, \
123 EVP_PKEY_CTRL_RSA_PSS_SALTLEN, len, NULL)
125 # define EVP_PKEY_CTX_get_rsa_pss_saltlen(ctx, plen) \
126 RSA_pkey_ctx_ctrl(ctx, (EVP_PKEY_OP_SIGN|EVP_PKEY_OP_VERIFY), \
127 EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN, 0, plen)
129 # define EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, bits) \
130 RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \
131 EVP_PKEY_CTRL_RSA_KEYGEN_BITS, bits, NULL)
133 # define EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp) \
134 RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \
135 EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP, 0, pubexp)
137 # define EVP_PKEY_CTX_set_rsa_keygen_primes(ctx, primes) \
138 RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \
139 EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES, primes, NULL)
141 # define EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md) \
142 RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \
143 EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)(md))
145 # define EVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md(ctx, md) \
146 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, EVP_PKEY_OP_KEYGEN, \
147 EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)(md))
149 # define EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md) \
150 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
151 EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)(md))
153 # define EVP_PKEY_CTX_get_rsa_mgf1_md(ctx, pmd) \
154 RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \
155 EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void *)(pmd))
157 # define EVP_PKEY_CTX_get_rsa_oaep_md(ctx, pmd) \
158 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
159 EVP_PKEY_CTRL_GET_RSA_OAEP_MD, 0, (void *)(pmd))
161 # define EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, l, llen) \
162 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
163 EVP_PKEY_CTRL_RSA_OAEP_LABEL, llen, (void *)(l))
165 # define EVP_PKEY_CTX_get0_rsa_oaep_label(ctx, l) \
166 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
167 EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL, 0, (void *)(l))
169 # define EVP_PKEY_CTX_set_rsa_pss_keygen_md(ctx, md) \
170 EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, \
171 EVP_PKEY_OP_KEYGEN, EVP_PKEY_CTRL_MD, \
174 # define EVP_PKEY_CTRL_RSA_PADDING (EVP_PKEY_ALG_CTRL + 1)
175 # define EVP_PKEY_CTRL_RSA_PSS_SALTLEN (EVP_PKEY_ALG_CTRL + 2)
177 # define EVP_PKEY_CTRL_RSA_KEYGEN_BITS (EVP_PKEY_ALG_CTRL + 3)
178 # define EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP (EVP_PKEY_ALG_CTRL + 4)
179 # define EVP_PKEY_CTRL_RSA_MGF1_MD (EVP_PKEY_ALG_CTRL + 5)
181 # define EVP_PKEY_CTRL_GET_RSA_PADDING (EVP_PKEY_ALG_CTRL + 6)
182 # define EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN (EVP_PKEY_ALG_CTRL + 7)
183 # define EVP_PKEY_CTRL_GET_RSA_MGF1_MD (EVP_PKEY_ALG_CTRL + 8)
185 # define EVP_PKEY_CTRL_RSA_OAEP_MD (EVP_PKEY_ALG_CTRL + 9)
186 # define EVP_PKEY_CTRL_RSA_OAEP_LABEL (EVP_PKEY_ALG_CTRL + 10)
188 # define EVP_PKEY_CTRL_GET_RSA_OAEP_MD (EVP_PKEY_ALG_CTRL + 11)
189 # define EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL (EVP_PKEY_ALG_CTRL + 12)
191 # define EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES (EVP_PKEY_ALG_CTRL + 13)
193 # define RSA_PKCS1_PADDING 1
194 # define RSA_SSLV23_PADDING 2
195 # define RSA_NO_PADDING 3
196 # define RSA_PKCS1_OAEP_PADDING 4
197 # define RSA_X931_PADDING 5
199 # define RSA_PKCS1_PSS_PADDING 6
201 # define RSA_PKCS1_PADDING_SIZE 11
203 # define RSA_set_app_data(s,arg) RSA_set_ex_data(s,0,arg)
204 # define RSA_get_app_data(s) RSA_get_ex_data(s,0)
207 RSA *RSA_new_method(ENGINE *engine);
208 int RSA_bits(const RSA *rsa);
209 int RSA_size(const RSA *rsa);
210 int RSA_security_bits(const RSA *rsa);
212 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d);
213 int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q);
214 int RSA_set0_crt_params(RSA *r,BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp);
215 int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[],
216 BIGNUM *coeffs[], int pnum);
217 void RSA_get0_key(const RSA *r,
218 const BIGNUM **n, const BIGNUM **e, const BIGNUM **d);
219 void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);
220 int RSA_get_multi_prime_extra_count(const RSA *r);
221 int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[]);
222 void RSA_get0_crt_params(const RSA *r,
223 const BIGNUM **dmp1, const BIGNUM **dmq1,
224 const BIGNUM **iqmp);
225 int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],
226 const BIGNUM *coeffs[]);
227 const BIGNUM *RSA_get0_n(const RSA *d);
228 const BIGNUM *RSA_get0_e(const RSA *d);
229 const BIGNUM *RSA_get0_d(const RSA *d);
230 const BIGNUM *RSA_get0_p(const RSA *d);
231 const BIGNUM *RSA_get0_q(const RSA *d);
232 const BIGNUM *RSA_get0_dmp1(const RSA *r);
233 const BIGNUM *RSA_get0_dmq1(const RSA *r);
234 const BIGNUM *RSA_get0_iqmp(const RSA *r);
235 void RSA_clear_flags(RSA *r, int flags);
236 int RSA_test_flags(const RSA *r, int flags);
237 void RSA_set_flags(RSA *r, int flags);
238 int RSA_get_version(RSA *r);
239 ENGINE *RSA_get0_engine(const RSA *r);
241 /* Deprecated version */
242 DEPRECATEDIN_0_9_8(RSA *RSA_generate_key(int bits, unsigned long e, void
243 (*callback) (int, int, void *),
247 int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
248 /* Multi-prime version */
249 int RSA_generate_multi_prime_key(RSA *rsa, int bits, int primes,
250 BIGNUM *e, BN_GENCB *cb);
252 int RSA_X931_derive_ex(RSA *rsa, BIGNUM *p1, BIGNUM *p2, BIGNUM *q1,
253 BIGNUM *q2, const BIGNUM *Xp1, const BIGNUM *Xp2,
254 const BIGNUM *Xp, const BIGNUM *Xq1, const BIGNUM *Xq2,
255 const BIGNUM *Xq, const BIGNUM *e, BN_GENCB *cb);
256 int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e,
259 int RSA_check_key(const RSA *);
260 int RSA_check_key_ex(const RSA *, BN_GENCB *cb);
261 /* next 4 return -1 on error */
262 int RSA_public_encrypt(int flen, const unsigned char *from,
263 unsigned char *to, RSA *rsa, int padding);
264 int RSA_private_encrypt(int flen, const unsigned char *from,
265 unsigned char *to, RSA *rsa, int padding);
266 int RSA_public_decrypt(int flen, const unsigned char *from,
267 unsigned char *to, RSA *rsa, int padding);
268 int RSA_private_decrypt(int flen, const unsigned char *from,
269 unsigned char *to, RSA *rsa, int padding);
270 void RSA_free(RSA *r);
271 /* "up" the RSA object's reference count */
272 int RSA_up_ref(RSA *r);
274 int RSA_flags(const RSA *r);
276 void RSA_set_default_method(const RSA_METHOD *meth);
277 const RSA_METHOD *RSA_get_default_method(void);
278 const RSA_METHOD *RSA_null_method(void);
279 const RSA_METHOD *RSA_get_method(const RSA *rsa);
280 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);
282 /* these are the actual RSA functions */
283 const RSA_METHOD *RSA_PKCS1_OpenSSL(void);
285 int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2);
287 DECLARE_ASN1_ENCODE_FUNCTIONS_name(RSA, RSAPublicKey)
288 DECLARE_ASN1_ENCODE_FUNCTIONS_name(RSA, RSAPrivateKey)
290 typedef struct rsa_pss_params_st {
291 X509_ALGOR *hashAlgorithm;
292 X509_ALGOR *maskGenAlgorithm;
293 ASN1_INTEGER *saltLength;
294 ASN1_INTEGER *trailerField;
295 /* Decoded hash algorithm from maskGenAlgorithm */
296 X509_ALGOR *maskHash;
299 DECLARE_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
301 typedef struct rsa_oaep_params_st {
302 X509_ALGOR *hashFunc;
303 X509_ALGOR *maskGenFunc;
304 X509_ALGOR *pSourceFunc;
305 /* Decoded hash algorithm from maskGenFunc */
306 X509_ALGOR *maskHash;
309 DECLARE_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)
311 # ifndef OPENSSL_NO_STDIO
312 int RSA_print_fp(FILE *fp, const RSA *r, int offset);
315 int RSA_print(BIO *bp, const RSA *r, int offset);
318 * The following 2 functions sign and verify a X509_SIG ASN1 object inside
319 * PKCS#1 padded RSA encryption
321 int RSA_sign(int type, const unsigned char *m, unsigned int m_length,
322 unsigned char *sigret, unsigned int *siglen, RSA *rsa);
323 int RSA_verify(int type, const unsigned char *m, unsigned int m_length,
324 const unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
327 * The following 2 function sign and verify a ASN1_OCTET_STRING object inside
328 * PKCS#1 padded RSA encryption
330 int RSA_sign_ASN1_OCTET_STRING(int type,
331 const unsigned char *m, unsigned int m_length,
332 unsigned char *sigret, unsigned int *siglen,
334 int RSA_verify_ASN1_OCTET_STRING(int type, const unsigned char *m,
335 unsigned int m_length, unsigned char *sigbuf,
336 unsigned int siglen, RSA *rsa);
338 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
339 void RSA_blinding_off(RSA *rsa);
340 BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);
342 int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
343 const unsigned char *f, int fl);
344 int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
345 const unsigned char *f, int fl,
347 int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
348 const unsigned char *f, int fl);
349 int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
350 const unsigned char *f, int fl,
352 int PKCS1_MGF1(unsigned char *mask, long len, const unsigned char *seed,
353 long seedlen, const EVP_MD *dgst);
354 int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
355 const unsigned char *f, int fl,
356 const unsigned char *p, int pl);
357 int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
358 const unsigned char *f, int fl, int rsa_len,
359 const unsigned char *p, int pl);
360 int RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,
361 const unsigned char *from, int flen,
362 const unsigned char *param, int plen,
363 const EVP_MD *md, const EVP_MD *mgf1md);
364 int RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,
365 const unsigned char *from, int flen,
366 int num, const unsigned char *param,
367 int plen, const EVP_MD *md,
368 const EVP_MD *mgf1md);
369 int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
370 const unsigned char *f, int fl);
371 int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
372 const unsigned char *f, int fl, int rsa_len);
373 int RSA_padding_add_none(unsigned char *to, int tlen, const unsigned char *f,
375 int RSA_padding_check_none(unsigned char *to, int tlen,
376 const unsigned char *f, int fl, int rsa_len);
377 int RSA_padding_add_X931(unsigned char *to, int tlen, const unsigned char *f,
379 int RSA_padding_check_X931(unsigned char *to, int tlen,
380 const unsigned char *f, int fl, int rsa_len);
381 int RSA_X931_hash_id(int nid);
383 int RSA_verify_PKCS1_PSS(RSA *rsa, const unsigned char *mHash,
384 const EVP_MD *Hash, const unsigned char *EM,
386 int RSA_padding_add_PKCS1_PSS(RSA *rsa, unsigned char *EM,
387 const unsigned char *mHash, const EVP_MD *Hash,
390 int RSA_verify_PKCS1_PSS_mgf1(RSA *rsa, const unsigned char *mHash,
391 const EVP_MD *Hash, const EVP_MD *mgf1Hash,
392 const unsigned char *EM, int sLen);
394 int RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,
395 const unsigned char *mHash,
396 const EVP_MD *Hash, const EVP_MD *mgf1Hash,
399 #define RSA_get_ex_new_index(l, p, newf, dupf, freef) \
400 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, l, p, newf, dupf, freef)
401 int RSA_set_ex_data(RSA *r, int idx, void *arg);
402 void *RSA_get_ex_data(const RSA *r, int idx);
404 DECLARE_ASN1_DUP_FUNCTION_name(RSA, RSAPublicKey)
405 DECLARE_ASN1_DUP_FUNCTION_name(RSA, RSAPrivateKey)
408 * If this flag is set the RSA method is FIPS compliant and can be used in
409 * FIPS mode. This is set in the validated module method. If an application
410 * sets this flag in its own methods it is its responsibility to ensure the
411 * result is compliant.
414 # define RSA_FLAG_FIPS_METHOD 0x0400
417 * If this flag is set the operations normally disabled in FIPS mode are
418 * permitted it is then the applications responsibility to ensure that the
419 * usage is compliant.
422 # define RSA_FLAG_NON_FIPS_ALLOW 0x0400
424 * Application has decided PRNG is good enough to generate a key: don't
427 # define RSA_FLAG_CHECKED 0x0800
429 RSA_METHOD *RSA_meth_new(const char *name, int flags);
430 void RSA_meth_free(RSA_METHOD *meth);
431 RSA_METHOD *RSA_meth_dup(const RSA_METHOD *meth);
432 const char *RSA_meth_get0_name(const RSA_METHOD *meth);
433 int RSA_meth_set1_name(RSA_METHOD *meth, const char *name);
434 int RSA_meth_get_flags(const RSA_METHOD *meth);
435 int RSA_meth_set_flags(RSA_METHOD *meth, int flags);
436 void *RSA_meth_get0_app_data(const RSA_METHOD *meth);
437 int RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data);
438 int (*RSA_meth_get_pub_enc(const RSA_METHOD *meth))
439 (int flen, const unsigned char *from,
440 unsigned char *to, RSA *rsa, int padding);
441 int RSA_meth_set_pub_enc(RSA_METHOD *rsa,
442 int (*pub_enc) (int flen, const unsigned char *from,
443 unsigned char *to, RSA *rsa,
445 int (*RSA_meth_get_pub_dec(const RSA_METHOD *meth))
446 (int flen, const unsigned char *from,
447 unsigned char *to, RSA *rsa, int padding);
448 int RSA_meth_set_pub_dec(RSA_METHOD *rsa,
449 int (*pub_dec) (int flen, const unsigned char *from,
450 unsigned char *to, RSA *rsa,
452 int (*RSA_meth_get_priv_enc(const RSA_METHOD *meth))
453 (int flen, const unsigned char *from,
454 unsigned char *to, RSA *rsa, int padding);
455 int RSA_meth_set_priv_enc(RSA_METHOD *rsa,
456 int (*priv_enc) (int flen, const unsigned char *from,
457 unsigned char *to, RSA *rsa,
459 int (*RSA_meth_get_priv_dec(const RSA_METHOD *meth))
460 (int flen, const unsigned char *from,
461 unsigned char *to, RSA *rsa, int padding);
462 int RSA_meth_set_priv_dec(RSA_METHOD *rsa,
463 int (*priv_dec) (int flen, const unsigned char *from,
464 unsigned char *to, RSA *rsa,
466 int (*RSA_meth_get_mod_exp(const RSA_METHOD *meth))
467 (BIGNUM *r0, const BIGNUM *i, RSA *rsa, BN_CTX *ctx);
468 int RSA_meth_set_mod_exp(RSA_METHOD *rsa,
469 int (*mod_exp) (BIGNUM *r0, const BIGNUM *i, RSA *rsa,
471 int (*RSA_meth_get_bn_mod_exp(const RSA_METHOD *meth))
472 (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
473 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
474 int RSA_meth_set_bn_mod_exp(RSA_METHOD *rsa,
475 int (*bn_mod_exp) (BIGNUM *r,
480 BN_MONT_CTX *m_ctx));
481 int (*RSA_meth_get_init(const RSA_METHOD *meth)) (RSA *rsa);
482 int RSA_meth_set_init(RSA_METHOD *rsa, int (*init) (RSA *rsa));
483 int (*RSA_meth_get_finish(const RSA_METHOD *meth)) (RSA *rsa);
484 int RSA_meth_set_finish(RSA_METHOD *rsa, int (*finish) (RSA *rsa));
485 int (*RSA_meth_get_sign(const RSA_METHOD *meth))
487 const unsigned char *m, unsigned int m_length,
488 unsigned char *sigret, unsigned int *siglen,
490 int RSA_meth_set_sign(RSA_METHOD *rsa,
491 int (*sign) (int type, const unsigned char *m,
492 unsigned int m_length,
493 unsigned char *sigret, unsigned int *siglen,
495 int (*RSA_meth_get_verify(const RSA_METHOD *meth))
496 (int dtype, const unsigned char *m,
497 unsigned int m_length, const unsigned char *sigbuf,
498 unsigned int siglen, const RSA *rsa);
499 int RSA_meth_set_verify(RSA_METHOD *rsa,
500 int (*verify) (int dtype, const unsigned char *m,
501 unsigned int m_length,
502 const unsigned char *sigbuf,
503 unsigned int siglen, const RSA *rsa));
504 int (*RSA_meth_get_keygen(const RSA_METHOD *meth))
505 (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
506 int RSA_meth_set_keygen(RSA_METHOD *rsa,
507 int (*keygen) (RSA *rsa, int bits, BIGNUM *e,
509 int (*RSA_meth_get_multi_prime_keygen(const RSA_METHOD *meth))
510 (RSA *rsa, int bits, int primes, BIGNUM *e, BN_GENCB *cb);
511 int RSA_meth_set_multi_prime_keygen(RSA_METHOD *meth,
512 int (*keygen) (RSA *rsa, int bits,
513 int primes, BIGNUM *e,