- {
- return(CRYPTO_get_ex_data(&r->ex_data,idx));
- }
-
-int RSA_size(const RSA *r)
- {
- return(BN_num_bytes(r->n));
- }
-
-int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
- RSA *rsa, int padding)
- {
- return(rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
- }
-
-int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
- RSA *rsa, int padding)
- {
- return(rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
- }
-
-int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
- RSA *rsa, int padding)
- {
- return(rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
- }
-
-int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
- RSA *rsa, int padding)
- {
- return(rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
- }
-
-int RSA_flags(const RSA *r)
- {
- return((r == NULL)?0:r->meth->flags);
- }
-
-void RSA_blinding_off(RSA *rsa)
- {
- if (rsa->blinding != NULL)
- {
- BN_BLINDING_free(rsa->blinding);
- rsa->blinding=NULL;
- }
- rsa->flags &= ~RSA_FLAG_BLINDING;
- rsa->flags |= RSA_FLAG_NO_BLINDING;
- }
-
-int RSA_blinding_on(RSA *rsa, BN_CTX *p_ctx)
- {
- BIGNUM *A,*Ai;
- BN_CTX *ctx;
- int ret=0;
-
- if (p_ctx == NULL)
- {
- if ((ctx=BN_CTX_new()) == NULL) goto err;
- }
- else
- ctx=p_ctx;
-
- if (rsa->blinding != NULL)
- BN_BLINDING_free(rsa->blinding);
-
- /* NB: similar code appears in setup_blinding (rsa_eay.c);
- * this should be placed in a new function of its own, but for reasons
- * of binary compatibility can't */
-
- BN_CTX_start(ctx);
- A = BN_CTX_get(ctx);
- if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
- {
- /* if PRNG is not properly seeded, resort to secret exponent as unpredictable seed */
- RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0);
- if (!BN_pseudo_rand_range(A,rsa->n)) goto err;
- }
- else
- {
- if (!BN_rand_range(A,rsa->n)) goto err;
- }
- if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
-
- if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
- goto err;
- if ((rsa->blinding=BN_BLINDING_new(A,Ai,rsa->n)) == NULL) goto err;
- /* to make things thread-safe without excessive locking,
- * rsa->blinding will be used just by the current thread: */
- rsa->blinding->thread_id = CRYPTO_thread_id();
- rsa->flags |= RSA_FLAG_BLINDING;
- rsa->flags &= ~RSA_FLAG_NO_BLINDING;
- BN_free(Ai);
- ret=1;
-err:
- BN_CTX_end(ctx);
- if (ctx != p_ctx) BN_CTX_free(ctx);
- return(ret);
- }