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/* $OpenBSD: rsa_local.h,v 1.7 2023/11/29 21:35:57 tb Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
__BEGIN_HIDDEN_DECLS
#define RSA_MIN_MODULUS_BITS 512
/* Macros to test if a pkey or ctx is for a PSS key */
#define pkey_is_pss(pkey) (pkey->ameth->pkey_id == EVP_PKEY_RSA_PSS)
#define pkey_ctx_is_pss(ctx) (ctx->pmeth->pkey_id == EVP_PKEY_RSA_PSS)
struct rsa_meth_st {
char *name;
int (*rsa_pub_enc)(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
int (*rsa_pub_dec)(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
int (*rsa_priv_enc)(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
int (*rsa_priv_dec)(int flen, const unsigned char *from,
unsigned char *to, RSA *rsa, int padding);
int (*rsa_mod_exp)(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
BN_CTX *ctx); /* Can be null */
int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); /* Can be null */
int (*init)(RSA *rsa); /* called at new */
int (*finish)(RSA *rsa); /* called at free */
int flags; /* RSA_METHOD_FLAG_* things */
char *app_data; /* may be needed! */
/* New sign and verify functions: some libraries don't allow arbitrary data
* to be signed/verified: this allows them to be used. Note: for this to work
* the RSA_public_decrypt() and RSA_private_encrypt() should *NOT* be used
* RSA_sign(), RSA_verify() should be used instead. Note: for backwards
* compatibility this functionality is only enabled if the RSA_FLAG_SIGN_VER
* option is set in 'flags'.
*/
int (*rsa_sign)(int type, const unsigned char *m, unsigned int m_length,
unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
int (*rsa_verify)(int dtype, const unsigned char *m,
unsigned int m_length, const unsigned char *sigbuf,
unsigned int siglen, const RSA *rsa);
/* If this callback is NULL, the builtin software RSA key-gen will be used. This
* is for behavioural compatibility whilst the code gets rewired, but one day
* it would be nice to assume there are no such things as "builtin software"
* implementations. */
int (*rsa_keygen)(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
};
struct rsa_st {
/* The first parameter is used to pickup errors where
* this is passed instead of aEVP_PKEY, it is set to 0 */
int pad;
long version;
const RSA_METHOD *meth;
BIGNUM *n;
BIGNUM *e;
BIGNUM *d;
BIGNUM *p;
BIGNUM *q;
BIGNUM *dmp1;
BIGNUM *dmq1;
BIGNUM *iqmp;
/* Parameter restrictions for PSS only keys. */
RSA_PSS_PARAMS *pss;
/* be careful using this if the RSA structure is shared */
CRYPTO_EX_DATA ex_data;
int references;
int flags;
/* Used to cache montgomery values */
BN_MONT_CTX *_method_mod_n;
BN_MONT_CTX *_method_mod_p;
BN_MONT_CTX *_method_mod_q;
/* all BIGNUM values are actually in the following data, if it is not
* NULL */
BN_BLINDING *blinding;
BN_BLINDING *mt_blinding;
};
RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd, const EVP_MD *mgf1md,
int saltlen);
int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
const EVP_MD **pmgf1md, int *psaltlen);
extern int int_rsa_verify(int dtype, const unsigned char *m,
unsigned int m_len, unsigned char *rm, size_t *prm_len,
const unsigned char *sigbuf, size_t siglen, RSA *rsa);
int RSA_padding_add_X931(unsigned char *to, int tlen,
const unsigned char *f, int fl);
int RSA_padding_check_X931(unsigned char *to, int tlen,
const unsigned char *f, int fl, int rsa_len);
int RSA_X931_hash_id(int nid);
BN_BLINDING *BN_BLINDING_new(const BIGNUM *e, const BIGNUM *mod, BN_CTX *ctx,
int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx), BN_MONT_CTX *m_ctx);
void BN_BLINDING_free(BN_BLINDING *b);
int BN_BLINDING_convert(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *);
int BN_BLINDING_invert(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *);
int BN_BLINDING_is_local(BN_BLINDING *b);
BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);
__END_HIDDEN_DECLS
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