include/openssl/rsa.h

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 #ifndef HEADER_RSA_H
  11 # define HEADER_RSA_H
  12
  13 # include <openssl/opensslconf.h>
  14
  15 # ifndef OPENSSL_NO_RSA
  16 # include <openssl/asn1.h>
  17 # include <openssl/bio.h>
  18 # include <openssl/crypto.h>
  19 # include <openssl/ossl_typ.h>
  20 # if OPENSSL_API_COMPAT < 0x10100000L
  21 #  include <openssl/bn.h>
  22 # endif
  23 # include <openssl/rsaerr.h>
  24 # ifdef  __cplusplus
  25 extern "C" {
  26 # endif
  27
  28 /* The types RSA and RSA_METHOD are defined in ossl_typ.h */
  29
  30 # ifndef OPENSSL_RSA_MAX_MODULUS_BITS
  31 #  define OPENSSL_RSA_MAX_MODULUS_BITS   16384
  32 # endif
  33
  34 # define OPENSSL_RSA_FIPS_MIN_MODULUS_BITS 1024
  35
  36 # ifndef OPENSSL_RSA_SMALL_MODULUS_BITS
  37 #  define OPENSSL_RSA_SMALL_MODULUS_BITS 3072
  38 # endif
  39 # ifndef OPENSSL_RSA_MAX_PUBEXP_BITS
  40
  41 /* exponent limit enforced for "large" modulus only */
  42 #  define OPENSSL_RSA_MAX_PUBEXP_BITS    64
  43 # endif
  44
  45 # define RSA_3   0x3L
  46 # define RSA_F4  0x10001L
  47
  48 /* based on RFC 8017 appendix A.1.2 */
  49 # define RSA_ASN1_VERSION_DEFAULT        0
  50 # define RSA_ASN1_VERSION_MULTI          1
  51
  52 # define RSA_DEFAULT_PRIME_NUM           2
  53
  54 # define RSA_METHOD_FLAG_NO_CHECK        0x0001/* don't check pub/private
  55                                                 * match */
  56
  57 # define RSA_FLAG_CACHE_PUBLIC           0x0002
  58 # define RSA_FLAG_CACHE_PRIVATE          0x0004
  59 # define RSA_FLAG_BLINDING               0x0008
  60 # define RSA_FLAG_THREAD_SAFE            0x0010
  61 /*
  62  * This flag means the private key operations will be handled by rsa_mod_exp
  63  * and that they do not depend on the private key components being present:
  64  * for example a key stored in external hardware. Without this flag
  65  * bn_mod_exp gets called when private key components are absent.
  66  */
  67 # define RSA_FLAG_EXT_PKEY               0x0020
  68
  69 /*
  70  * new with 0.9.6j and 0.9.7b; the built-in
  71  * RSA implementation now uses blinding by
  72  * default (ignoring RSA_FLAG_BLINDING),
  73  * but other engines might not need it
  74  */
  75 # define RSA_FLAG_NO_BLINDING            0x0080
  76 # if OPENSSL_API_COMPAT < 0x10100000L
  77 /*
  78  * Does nothing. Previously this switched off constant time behaviour.
  79  */
  80 #  define RSA_FLAG_NO_CONSTTIME           0x0000
  81 # endif
  82 # if OPENSSL_API_COMPAT < 0x00908000L
  83 /* deprecated name for the flag*/
  84 /*
  85  * new with 0.9.7h; the built-in RSA
  86  * implementation now uses constant time
  87  * modular exponentiation for secret exponents
  88  * by default. This flag causes the
  89  * faster variable sliding window method to
  90  * be used for all exponents.
  91  */
  92 #  define RSA_FLAG_NO_EXP_CONSTTIME RSA_FLAG_NO_CONSTTIME
  93 # endif
  94
  95 # define EVP_PKEY_CTX_set_rsa_padding(ctx, pad) \
  96         RSA_pkey_ctx_ctrl(ctx, -1, EVP_PKEY_CTRL_RSA_PADDING, pad, NULL)
  97
  98 # define EVP_PKEY_CTX_get_rsa_padding(ctx, ppad) \
  99         RSA_pkey_ctx_ctrl(ctx, -1, EVP_PKEY_CTRL_GET_RSA_PADDING, 0, ppad)
 100
 101 # define EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, len) \
 102         RSA_pkey_ctx_ctrl(ctx, (EVP_PKEY_OP_SIGN|EVP_PKEY_OP_VERIFY), \
 103                           EVP_PKEY_CTRL_RSA_PSS_SALTLEN, len, NULL)
 104 /* Salt length matches digest */
 105 # define RSA_PSS_SALTLEN_DIGEST -1
 106 /* Verify only: auto detect salt length */
 107 # define RSA_PSS_SALTLEN_AUTO   -2
 108 /* Set salt length to maximum possible */
 109 # define RSA_PSS_SALTLEN_MAX    -3
 110 /* Old compatible max salt length for sign only */
 111 # define RSA_PSS_SALTLEN_MAX_SIGN    -2
 112
 113 # define EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(ctx, len) \
 114         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, EVP_PKEY_OP_KEYGEN, \
 115                           EVP_PKEY_CTRL_RSA_PSS_SALTLEN, len, NULL)
 116
 117 # define EVP_PKEY_CTX_get_rsa_pss_saltlen(ctx, plen) \
 118         RSA_pkey_ctx_ctrl(ctx, (EVP_PKEY_OP_SIGN|EVP_PKEY_OP_VERIFY), \
 119                           EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN, 0, plen)
 120
 121 # define EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, bits) \
 122         RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \
 123                           EVP_PKEY_CTRL_RSA_KEYGEN_BITS, bits, NULL)
 124
 125 # define EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp) \
 126         RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \
 127                           EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP, 0, pubexp)
 128
 129 # define EVP_PKEY_CTX_set_rsa_keygen_primes(ctx, primes) \
 130         RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \
 131                           EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES, primes, NULL)
 132
 133 # define  EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, md) \
 134         RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \
 135                           EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)(md))
 136
 137 # define  EVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md(ctx, md) \
 138         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, EVP_PKEY_OP_KEYGEN, \
 139                           EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)(md))
 140
 141 # define  EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md) \
 142         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,  \
 143                           EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)(md))
 144
 145 # define  EVP_PKEY_CTX_get_rsa_mgf1_md(ctx, pmd) \
 146         RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \
 147                           EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void *)(pmd))
 148
 149 # define  EVP_PKEY_CTX_get_rsa_oaep_md(ctx, pmd) \
 150         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,  \
 151                           EVP_PKEY_CTRL_GET_RSA_OAEP_MD, 0, (void *)(pmd))
 152
 153 # define  EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, l, llen) \
 154         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,  \
 155                           EVP_PKEY_CTRL_RSA_OAEP_LABEL, llen, (void *)(l))
 156
 157 # define  EVP_PKEY_CTX_get0_rsa_oaep_label(ctx, l) \
 158         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,  \
 159                           EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL, 0, (void *)(l))
 160
 161 # define  EVP_PKEY_CTX_set_rsa_pss_keygen_md(ctx, md) \
 162         EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS,  \
 163                           EVP_PKEY_OP_TYPE_KEYGEN, EVP_PKEY_CTRL_MD,  \
 164                           0, (void *)(md))
 165
 166 # define EVP_PKEY_CTRL_RSA_PADDING       (EVP_PKEY_ALG_CTRL + 1)
 167 # define EVP_PKEY_CTRL_RSA_PSS_SALTLEN   (EVP_PKEY_ALG_CTRL + 2)
 168
 169 # define EVP_PKEY_CTRL_RSA_KEYGEN_BITS   (EVP_PKEY_ALG_CTRL + 3)
 170 # define EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP (EVP_PKEY_ALG_CTRL + 4)
 171 # define EVP_PKEY_CTRL_RSA_MGF1_MD       (EVP_PKEY_ALG_CTRL + 5)
 172
 173 # define EVP_PKEY_CTRL_GET_RSA_PADDING           (EVP_PKEY_ALG_CTRL + 6)
 174 # define EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN       (EVP_PKEY_ALG_CTRL + 7)
 175 # define EVP_PKEY_CTRL_GET_RSA_MGF1_MD           (EVP_PKEY_ALG_CTRL + 8)
 176
 177 # define EVP_PKEY_CTRL_RSA_OAEP_MD       (EVP_PKEY_ALG_CTRL + 9)
 178 # define EVP_PKEY_CTRL_RSA_OAEP_LABEL    (EVP_PKEY_ALG_CTRL + 10)
 179
 180 # define EVP_PKEY_CTRL_GET_RSA_OAEP_MD   (EVP_PKEY_ALG_CTRL + 11)
 181 # define EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL (EVP_PKEY_ALG_CTRL + 12)
 182
 183 # define EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES  (EVP_PKEY_ALG_CTRL + 13)
 184
 185 # define RSA_PKCS1_PADDING       1
 186 # define RSA_SSLV23_PADDING      2
 187 # define RSA_NO_PADDING          3
 188 # define RSA_PKCS1_OAEP_PADDING  4
 189 # define RSA_X931_PADDING        5
 190 /* EVP_PKEY_ only */
 191 # define RSA_PKCS1_PSS_PADDING   6
 192
 193 # define RSA_PKCS1_PADDING_SIZE  11
 194
 195 # define RSA_set_app_data(s,arg)         RSA_set_ex_data(s,0,arg)
 196 # define RSA_get_app_data(s)             RSA_get_ex_data(s,0)
 197
 198 RSA *RSA_new(void);
 199 RSA *RSA_new_method(ENGINE *engine);
 200 int RSA_bits(const RSA *rsa);
 201 int RSA_size(const RSA *rsa);
 202 int RSA_security_bits(const RSA *rsa);
 203
 204 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d);
 205 int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q);
 206 int RSA_set0_crt_params(RSA *r,BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp);
 207 int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[],
 208                                 BIGNUM *coeffs[], int pnum);
 209 void RSA_get0_key(const RSA *r,
 210                   const BIGNUM **n, const BIGNUM **e, const BIGNUM **d);
 211 void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);
 212 int RSA_get_multi_prime_extra_count(const RSA *r);
 213 int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[]);
 214 void RSA_get0_crt_params(const RSA *r,
 215                          const BIGNUM **dmp1, const BIGNUM **dmq1,
 216                          const BIGNUM **iqmp);
 217 int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],
 218                                     const BIGNUM *coeffs[]);
 219 const BIGNUM *RSA_get0_n(const RSA *d);
 220 const BIGNUM *RSA_get0_e(const RSA *d);
 221 const BIGNUM *RSA_get0_d(const RSA *d);
 222 const BIGNUM *RSA_get0_p(const RSA *d);
 223 const BIGNUM *RSA_get0_q(const RSA *d);
 224 const BIGNUM *RSA_get0_dmp1(const RSA *r);
 225 const BIGNUM *RSA_get0_dmq1(const RSA *r);
 226 const BIGNUM *RSA_get0_iqmp(const RSA *r);
 227 void RSA_clear_flags(RSA *r, int flags);
 228 int RSA_test_flags(const RSA *r, int flags);
 229 void RSA_set_flags(RSA *r, int flags);
 230 int RSA_get_version(RSA *r);
 231 ENGINE *RSA_get0_engine(const RSA *r);
 232
 233 /* Deprecated version */
 234 DEPRECATEDIN_0_9_8(RSA *RSA_generate_key(int bits, unsigned long e, void
 235                                          (*callback) (int, int, void *),
 236                                          void *cb_arg))
 237
 238 /* New version */
 239 int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
 240 /* Multi-prime version */
 241 int RSA_generate_multi_prime_key(RSA *rsa, int bits, int primes,
 242                                  BIGNUM *e, BN_GENCB *cb);
 243
 244 int RSA_X931_derive_ex(RSA *rsa, BIGNUM *p1, BIGNUM *p2, BIGNUM *q1,
 245                        BIGNUM *q2, const BIGNUM *Xp1, const BIGNUM *Xp2,
 246                        const BIGNUM *Xp, const BIGNUM *Xq1, const BIGNUM *Xq2,
 247                        const BIGNUM *Xq, const BIGNUM *e, BN_GENCB *cb);
 248 int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e,
 249                              BN_GENCB *cb);
 250
 251 int RSA_check_key(const RSA *);
 252 int RSA_check_key_ex(const RSA *, BN_GENCB *cb);
 253         /* next 4 return -1 on error */
 254 int RSA_public_encrypt(int flen, const unsigned char *from,
 255                        unsigned char *to, RSA *rsa, int padding);
 256 int RSA_private_encrypt(int flen, const unsigned char *from,
 257                         unsigned char *to, RSA *rsa, int padding);
 258 int RSA_public_decrypt(int flen, const unsigned char *from,
 259                        unsigned char *to, RSA *rsa, int padding);
 260 int RSA_private_decrypt(int flen, const unsigned char *from,
 261                         unsigned char *to, RSA *rsa, int padding);
 262 void RSA_free(RSA *r);
 263 /* "up" the RSA object's reference count */
 264 int RSA_up_ref(RSA *r);
 265
 266 int RSA_flags(const RSA *r);
 267
 268 void RSA_set_default_method(const RSA_METHOD *meth);
 269 const RSA_METHOD *RSA_get_default_method(void);
 270 const RSA_METHOD *RSA_null_method(void);
 271 const RSA_METHOD *RSA_get_method(const RSA *rsa);
 272 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);
 273
 274 /* these are the actual RSA functions */
 275 const RSA_METHOD *RSA_PKCS1_OpenSSL(void);
 276
 277 int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2);
 278
 279 DECLARE_ASN1_ENCODE_FUNCTIONS_const(RSA, RSAPublicKey)
 280 DECLARE_ASN1_ENCODE_FUNCTIONS_const(RSA, RSAPrivateKey)
 281
 282 typedef struct rsa_pss_params_st {
 283     X509_ALGOR *hashAlgorithm;
 284     X509_ALGOR *maskGenAlgorithm;
 285     ASN1_INTEGER *saltLength;
 286     ASN1_INTEGER *trailerField;
 287     /* Decoded hash algorithm from maskGenAlgorithm */
 288     X509_ALGOR *maskHash;
 289 } RSA_PSS_PARAMS;
 290
 291 DECLARE_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
 292
 293 typedef struct rsa_oaep_params_st {
 294     X509_ALGOR *hashFunc;
 295     X509_ALGOR *maskGenFunc;
 296     X509_ALGOR *pSourceFunc;
 297     /* Decoded hash algorithm from maskGenFunc */
 298     X509_ALGOR *maskHash;
 299 } RSA_OAEP_PARAMS;
 300
 301 DECLARE_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)
 302
 303 # ifndef OPENSSL_NO_STDIO
 304 int RSA_print_fp(FILE *fp, const RSA *r, int offset);
 305 # endif
 306
 307 int RSA_print(BIO *bp, const RSA *r, int offset);
 308
 309 /*
 310  * The following 2 functions sign and verify a X509_SIG ASN1 object inside
 311  * PKCS#1 padded RSA encryption
 312  */
 313 int RSA_sign(int type, const unsigned char *m, unsigned int m_length,
 314              unsigned char *sigret, unsigned int *siglen, RSA *rsa);
 315 int RSA_verify(int type, const unsigned char *m, unsigned int m_length,
 316                const unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
 317
 318 /*
 319  * The following 2 function sign and verify a ASN1_OCTET_STRING object inside
 320  * PKCS#1 padded RSA encryption
 321  */
 322 int RSA_sign_ASN1_OCTET_STRING(int type,
 323                                const unsigned char *m, unsigned int m_length,
 324                                unsigned char *sigret, unsigned int *siglen,
 325                                RSA *rsa);
 326 int RSA_verify_ASN1_OCTET_STRING(int type, const unsigned char *m,
 327                                  unsigned int m_length, unsigned char *sigbuf,
 328                                  unsigned int siglen, RSA *rsa);
 329
 330 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
 331 void RSA_blinding_off(RSA *rsa);
 332 BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);
 333
 334 int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
 335                                  const unsigned char *f, int fl);
 336 int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
 337                                    const unsigned char *f, int fl,
 338                                    int rsa_len);
 339 int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
 340                                  const unsigned char *f, int fl);
 341 int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
 342                                    const unsigned char *f, int fl,
 343                                    int rsa_len);
 344 int PKCS1_MGF1(unsigned char *mask, long len, const unsigned char *seed,
 345                long seedlen, const EVP_MD *dgst);
 346 int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
 347                                const unsigned char *f, int fl,
 348                                const unsigned char *p, int pl);
 349 int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,
 350                                  const unsigned char *f, int fl, int rsa_len,
 351                                  const unsigned char *p, int pl);
 352 int RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,
 353                                     const unsigned char *from, int flen,
 354                                     const unsigned char *param, int plen,
 355                                     const EVP_MD *md, const EVP_MD *mgf1md);
 356 int RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,
 357                                       const unsigned char *from, int flen,
 358                                       int num, const unsigned char *param,
 359                                       int plen, const EVP_MD *md,
 360                                       const EVP_MD *mgf1md);
 361 int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
 362                            const unsigned char *f, int fl);
 363 int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
 364                              const unsigned char *f, int fl, int rsa_len);
 365 int RSA_padding_add_none(unsigned char *to, int tlen, const unsigned char *f,
 366                          int fl);
 367 int RSA_padding_check_none(unsigned char *to, int tlen,
 368                            const unsigned char *f, int fl, int rsa_len);
 369 int RSA_padding_add_X931(unsigned char *to, int tlen, const unsigned char *f,
 370                          int fl);
 371 int RSA_padding_check_X931(unsigned char *to, int tlen,
 372                            const unsigned char *f, int fl, int rsa_len);
 373 int RSA_X931_hash_id(int nid);
 374
 375 int RSA_verify_PKCS1_PSS(RSA *rsa, const unsigned char *mHash,
 376                          const EVP_MD *Hash, const unsigned char *EM,
 377                          int sLen);
 378 int RSA_padding_add_PKCS1_PSS(RSA *rsa, unsigned char *EM,
 379                               const unsigned char *mHash, const EVP_MD *Hash,
 380                               int sLen);
 381
 382 int RSA_verify_PKCS1_PSS_mgf1(RSA *rsa, const unsigned char *mHash,
 383                               const EVP_MD *Hash, const EVP_MD *mgf1Hash,
 384                               const unsigned char *EM, int sLen);
 385
 386 int RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,
 387                                    const unsigned char *mHash,
 388                                    const EVP_MD *Hash, const EVP_MD *mgf1Hash,
 389                                    int sLen);
 390
 391 #define RSA_get_ex_new_index(l, p, newf, dupf, freef) \
 392     CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, l, p, newf, dupf, freef)
 393 int RSA_set_ex_data(RSA *r, int idx, void *arg);
 394 void *RSA_get_ex_data(const RSA *r, int idx);
 395
 396 RSA *RSAPublicKey_dup(RSA *rsa);
 397 RSA *RSAPrivateKey_dup(RSA *rsa);
 398
 399 /*
 400  * If this flag is set the RSA method is FIPS compliant and can be used in
 401  * FIPS mode. This is set in the validated module method. If an application
 402  * sets this flag in its own methods it is its responsibility to ensure the
 403  * result is compliant.
 404  */
 405
 406 # define RSA_FLAG_FIPS_METHOD                    0x0400
 407
 408 /*
 409  * If this flag is set the operations normally disabled in FIPS mode are
 410  * permitted it is then the applications responsibility to ensure that the
 411  * usage is compliant.
 412  */
 413
 414 # define RSA_FLAG_NON_FIPS_ALLOW                 0x0400
 415 /*
 416  * Application has decided PRNG is good enough to generate a key: don't
 417  * check.
 418  */
 419 # define RSA_FLAG_CHECKED                        0x0800
 420
 421 RSA_METHOD *RSA_meth_new(const char *name, int flags);
 422 void RSA_meth_free(RSA_METHOD *meth);
 423 RSA_METHOD *RSA_meth_dup(const RSA_METHOD *meth);
 424 const char *RSA_meth_get0_name(const RSA_METHOD *meth);
 425 int RSA_meth_set1_name(RSA_METHOD *meth, const char *name);
 426 int RSA_meth_get_flags(const RSA_METHOD *meth);
 427 int RSA_meth_set_flags(RSA_METHOD *meth, int flags);
 428 void *RSA_meth_get0_app_data(const RSA_METHOD *meth);
 429 int RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data);
 430 int (*RSA_meth_get_pub_enc(const RSA_METHOD *meth))
 431     (int flen, const unsigned char *from,
 432      unsigned char *to, RSA *rsa, int padding);
 433 int RSA_meth_set_pub_enc(RSA_METHOD *rsa,
 434                          int (*pub_enc) (int flen, const unsigned char *from,
 435                                          unsigned char *to, RSA *rsa,
 436                                          int padding));
 437 int (*RSA_meth_get_pub_dec(const RSA_METHOD *meth))
 438     (int flen, const unsigned char *from,
 439      unsigned char *to, RSA *rsa, int padding);
 440 int RSA_meth_set_pub_dec(RSA_METHOD *rsa,
 441                          int (*pub_dec) (int flen, const unsigned char *from,
 442                                          unsigned char *to, RSA *rsa,
 443                                          int padding));
 444 int (*RSA_meth_get_priv_enc(const RSA_METHOD *meth))
 445     (int flen, const unsigned char *from,
 446      unsigned char *to, RSA *rsa, int padding);
 447 int RSA_meth_set_priv_enc(RSA_METHOD *rsa,
 448                           int (*priv_enc) (int flen, const unsigned char *from,
 449                                            unsigned char *to, RSA *rsa,
 450                                            int padding));
 451 int (*RSA_meth_get_priv_dec(const RSA_METHOD *meth))
 452     (int flen, const unsigned char *from,
 453      unsigned char *to, RSA *rsa, int padding);
 454 int RSA_meth_set_priv_dec(RSA_METHOD *rsa,
 455                           int (*priv_dec) (int flen, const unsigned char *from,
 456                                            unsigned char *to, RSA *rsa,
 457                                            int padding));
 458 int (*RSA_meth_get_mod_exp(const RSA_METHOD *meth))
 459     (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
 460 int RSA_meth_set_mod_exp(RSA_METHOD *rsa,
 461                          int (*mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa,
 462                                          BN_CTX *ctx));
 463 int (*RSA_meth_get_bn_mod_exp(const RSA_METHOD *meth))
 464     (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 465      const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 466 int RSA_meth_set_bn_mod_exp(RSA_METHOD *rsa,
 467                             int (*bn_mod_exp) (BIGNUM *r,
 468                                                const BIGNUM *a,
 469                                                const BIGNUM *p,
 470                                                const BIGNUM *m,
 471                                                BN_CTX *ctx,
 472                                                BN_MONT_CTX *m_ctx));
 473 int (*RSA_meth_get_init(const RSA_METHOD *meth)) (RSA *rsa);
 474 int RSA_meth_set_init(RSA_METHOD *rsa, int (*init) (RSA *rsa));
 475 int (*RSA_meth_get_finish(const RSA_METHOD *meth)) (RSA *rsa);
 476 int RSA_meth_set_finish(RSA_METHOD *rsa, int (*finish) (RSA *rsa));
 477 int (*RSA_meth_get_sign(const RSA_METHOD *meth))
 478     (int type,
 479      const unsigned char *m, unsigned int m_length,
 480      unsigned char *sigret, unsigned int *siglen,
 481      const RSA *rsa);
 482 int RSA_meth_set_sign(RSA_METHOD *rsa,
 483                       int (*sign) (int type, const unsigned char *m,
 484                                    unsigned int m_length,
 485                                    unsigned char *sigret, unsigned int *siglen,
 486                                    const RSA *rsa));
 487 int (*RSA_meth_get_verify(const RSA_METHOD *meth))
 488     (int dtype, const unsigned char *m,
 489      unsigned int m_length, const unsigned char *sigbuf,
 490      unsigned int siglen, const RSA *rsa);
 491 int RSA_meth_set_verify(RSA_METHOD *rsa,
 492                         int (*verify) (int dtype, const unsigned char *m,
 493                                        unsigned int m_length,
 494                                        const unsigned char *sigbuf,
 495                                        unsigned int siglen, const RSA *rsa));
 496 int (*RSA_meth_get_keygen(const RSA_METHOD *meth))
 497     (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
 498 int RSA_meth_set_keygen(RSA_METHOD *rsa,
 499                         int (*keygen) (RSA *rsa, int bits, BIGNUM *e,
 500                                        BN_GENCB *cb));
 501 int (*RSA_meth_get_multi_prime_keygen(const RSA_METHOD *meth))
 502     (RSA *rsa, int bits, int primes, BIGNUM *e, BN_GENCB *cb);
 503 int RSA_meth_set_multi_prime_keygen(RSA_METHOD *meth,
 504                                     int (*keygen) (RSA *rsa, int bits,
 505                                                    int primes, BIGNUM *e,
 506                                                    BN_GENCB *cb));
 507
 508 #  ifdef  __cplusplus
 509 }
 510 #  endif
 511 # endif
 512 #endif