BN_BLINDING_NEW(3ossl) OpenSSL BN_BLINDING_NEW(3ossl)
NAME
BN_BLINDING_new, BN_BLINDING_free, BN_BLINDING_update,
BN_BLINDING_convert, BN_BLINDING_invert, BN_BLINDING_convert_ex,
BN_BLINDING_invert_ex, BN_BLINDING_is_current_thread,
BN_BLINDING_set_current_thread, BN_BLINDING_lock, BN_BLINDING_unlock,
BN_BLINDING_get_flags, BN_BLINDING_set_flags, BN_BLINDING_create_param
- blinding related BIGNUM functions
SYNOPSIS
#include <openssl/bn.h>
BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai,
BIGNUM *mod);
void BN_BLINDING_free(BN_BLINDING *b);
int BN_BLINDING_update(BN_BLINDING *b, BN_CTX *ctx);
int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
int BN_BLINDING_convert_ex(BIGNUM *n, BIGNUM *r, BN_BLINDING *b,
BN_CTX *ctx);
int BN_BLINDING_invert_ex(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b,
BN_CTX *ctx);
int BN_BLINDING_is_current_thread(BN_BLINDING *b);
void BN_BLINDING_set_current_thread(BN_BLINDING *b);
int BN_BLINDING_lock(BN_BLINDING *b);
int BN_BLINDING_unlock(BN_BLINDING *b);
unsigned long BN_BLINDING_get_flags(const BN_BLINDING *b);
void BN_BLINDING_set_flags(BN_BLINDING *b, unsigned long flags);
BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b,
const BIGNUM *e, BIGNUM *m, 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);
DESCRIPTION
BN_BLINDING_new(3) allocates a new BN_BLINDING structure and copies the
A and Ai values into the newly created BN_BLINDING object.
BN_BLINDING_free() frees the BN_BLINDING structure. If b is NULL,
nothing is done.
BN_BLINDING_update() updates the BN_BLINDING parameters by squaring the
A and Ai or, after specific number of uses and if the necessary
parameters are set, by re-creating the blinding parameters.
BN_BLINDING_convert_ex() multiplies n with the blinding factor A. If r
is not NULL a copy the inverse blinding factor Ai will be returned in r
(this is useful if a RSA object is shared among several threads).
BN_BLINDING_invert_ex() multiplies n with the inverse blinding factor
Ai. If r is not NULL it will be used as the inverse blinding.
BN_BLINDING_convert() and BN_BLINDING_invert() are wrapper functions
for BN_BLINDING_convert_ex() and BN_BLINDING_invert_ex() with r set to
NULL.
BN_BLINDING_is_current_thread() returns whether the BN_BLINDING
structure is owned by the current thread. This is to help users provide
proper locking if needed for multi-threaded use.
BN_BLINDING_set_current_thread() sets the current thread as the owner
of the BN_BLINDING structure.
BN_BLINDING_lock() locks the BN_BLINDING structure.
BN_BLINDING_unlock() unlocks the BN_BLINDING structure.
BN_BLINDING_get_flags() returns the BN_BLINDING flags. Currently there
are two supported flags: BN_BLINDING_NO_UPDATE and
BN_BLINDING_NO_RECREATE. BN_BLINDING_NO_UPDATE inhibits the automatic
update of the BN_BLINDING parameters after each use and
BN_BLINDING_NO_RECREATE inhibits the automatic re-creation of the
BN_BLINDING parameters after a fixed number of uses (currently 32). In
newly allocated BN_BLINDING objects no flags are set.
BN_BLINDING_set_flags() sets the BN_BLINDING parameters flags.
BN_BLINDING_create_param() creates new BN_BLINDING parameters using the
exponent e and the modulus m. bn_mod_exp and m_ctx can be used to pass
special functions for exponentiation (normally BN_mod_exp_mont() and
BN_MONT_CTX).
RETURN VALUES
BN_BLINDING_new(3) returns the newly allocated BN_BLINDING structure or
NULL in case of an error.
BN_BLINDING_update(), BN_BLINDING_convert(), BN_BLINDING_invert(),
BN_BLINDING_convert_ex() and BN_BLINDING_invert_ex() return 1 on
success and 0 if an error occurred.
BN_BLINDING_is_current_thread() returns 1 if the current thread owns
the BN_BLINDING object, 0 otherwise.
BN_BLINDING_set_current_thread() doesn't return anything.
BN_BLINDING_lock(), BN_BLINDING_unlock() return 1 if the operation
succeeded or 0 on error.
BN_BLINDING_get_flags() returns the currently set BN_BLINDING flags (a
unsigned long value).
BN_BLINDING_create_param() returns the newly created BN_BLINDING
parameters or NULL on error.
HISTORY
BN_BLINDING_thread_id() was first introduced in OpenSSL 1.0.0, and it
deprecates BN_BLINDING_set_thread_id() and BN_BLINDING_get_thread_id().
COPYRIGHT
Copyright 2005-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.4.0 2024-10-29 BN_BLINDING_NEW(3ossl)
openssl 3.4.0 - Generated Sat Nov 2 07:18:58 CDT 2024