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 *); void BN_BLINDING_set_flags(BN_BLINDING *, unsigned long); 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 2005-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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.