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
#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);
BN_BLINDING_new()
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).
BN_BLINDING_new()
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.
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 2005-2021 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.