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/* $OpenBSD: rsa_local.h,v 1.1 2022/11/26 16:08:54 tb Exp $ */
__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;
/* functional reference if 'meth' is ENGINE-provided */
ENGINE *engine;
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);
__END_HIDDEN_DECLS
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