You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
115 lines
4.4 KiB
115 lines
4.4 KiB
=pod |
|
|
|
=head1 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_get_thread_id, BN_BLINDING_set_thread_id, BN_BLINDING_get_flags, |
|
BN_BLINDING_set_flags, BN_BLINDING_create_param - blinding related BIGNUM |
|
functions. |
|
|
|
=head1 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); |
|
#ifndef OPENSSL_NO_DEPRECATED |
|
unsigned long BN_BLINDING_get_thread_id(const BN_BLINDING *); |
|
void BN_BLINDING_set_thread_id(BN_BLINDING *, unsigned long); |
|
#endif |
|
CRYPTO_THREADID *BN_BLINDING_thread_id(BN_BLINDING *); |
|
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); |
|
|
|
=head1 DESCRIPTION |
|
|
|
BN_BLINDING_new() allocates a new B<BN_BLINDING> structure and copies |
|
the B<A> and B<Ai> values into the newly created B<BN_BLINDING> object. |
|
|
|
BN_BLINDING_free() frees the B<BN_BLINDING> structure. |
|
|
|
BN_BLINDING_update() updates the B<BN_BLINDING> parameters by squaring |
|
the B<A> and B<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 B<n> with the blinding factor B<A>. |
|
If B<r> is not NULL a copy the inverse blinding factor B<Ai> will be |
|
returned in B<r> (this is useful if a B<RSA> object is shared among |
|
several threads). BN_BLINDING_invert_ex() multiplies B<n> with the |
|
inverse blinding factor B<Ai>. If B<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 B<r> set to NULL. |
|
|
|
BN_BLINDING_thread_id() provides access to the B<CRYPTO_THREADID> |
|
object within the B<BN_BLINDING> structure. This is to help users |
|
provide proper locking if needed for multi-threaded use. The "thread |
|
id" object of a newly allocated B<BN_BLINDING> structure is |
|
initialised to the thread id in which BN_BLINDING_new() was called. |
|
|
|
BN_BLINDING_get_flags() returns the BN_BLINDING flags. Currently |
|
there are two supported flags: B<BN_BLINDING_NO_UPDATE> and |
|
B<BN_BLINDING_NO_RECREATE>. B<BN_BLINDING_NO_UPDATE> inhibits the |
|
automatic update of the B<BN_BLINDING> parameters after each use |
|
and B<BN_BLINDING_NO_RECREATE> inhibits the automatic re-creation |
|
of the B<BN_BLINDING> parameters after a fixed number of uses (currently |
|
32). In newly allocated B<BN_BLINDING> objects no flags are set. |
|
BN_BLINDING_set_flags() sets the B<BN_BLINDING> parameters flags. |
|
|
|
BN_BLINDING_create_param() creates new B<BN_BLINDING> parameters |
|
using the exponent B<e> and the modulus B<m>. B<bn_mod_exp> and |
|
B<m_ctx> can be used to pass special functions for exponentiation |
|
(normally BN_mod_exp_mont() and B<BN_MONT_CTX>). |
|
|
|
=head1 RETURN VALUES |
|
|
|
BN_BLINDING_new() returns the newly allocated B<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 occured. |
|
|
|
BN_BLINDING_thread_id() returns a pointer to the thread id object |
|
within a B<BN_BLINDING> object. |
|
|
|
BN_BLINDING_get_flags() returns the currently set B<BN_BLINDING> flags |
|
(a B<unsigned long> value). |
|
|
|
BN_BLINDING_create_param() returns the newly created B<BN_BLINDING> |
|
parameters or NULL on error. |
|
|
|
=head1 SEE ALSO |
|
|
|
L<bn(3)|bn(3)> |
|
|
|
=head1 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. |
|
|
|
BN_BLINDING_convert_ex, BN_BLINDIND_invert_ex, BN_BLINDING_get_thread_id, |
|
BN_BLINDING_set_thread_id, BN_BLINDING_set_flags, BN_BLINDING_get_flags |
|
and BN_BLINDING_create_param were first introduced in OpenSSL 0.9.8 |
|
|
|
=head1 AUTHOR |
|
|
|
Nils Larsch for the OpenSSL project (http://www.openssl.org). |
|
|
|
=cut
|
|
|