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Edit File : BN_BLINDING_set_flags.3 \| Size : 9.09 KB
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "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_thread_id, BN_BLINDING_get_flags, BN_BLINDING_set_flags, BN_BLINDING_create_param \- blinding related BIGNUM functions. .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBBN_BLINDING_new()\fR allocates a new \fB\s-1BN_BLINDING\s0\fR structure and copies the \fBA\fR and \fBAi\fR values into the newly created \fB\s-1BN_BLINDING\s0\fR object. .PP \&\fBBN_BLINDING_free()\fR frees the \fB\s-1BN_BLINDING\s0\fR structure. .PP \&\fBBN_BLINDING_update()\fR updates the \fB\s-1BN_BLINDING\s0\fR parameters by squaring the \fBA\fR and \fBAi\fR or, after specific number of uses and if the necessary parameters are set, by re-creating the blinding parameters. .PP \&\fBBN_BLINDING_convert_ex()\fR multiplies \fBn\fR with the blinding factor \fBA\fR. If \fBr\fR is not \s-1NULL\s0 a copy the inverse blinding factor \fBAi\fR will be returned in \fBr\fR (this is useful if a \fB\s-1RSA\s0\fR object is shared among several threads). \fBBN_BLINDING_invert_ex()\fR multiplies \fBn\fR with the inverse blinding factor \fBAi\fR. If \fBr\fR is not \s-1NULL\s0 it will be used as the inverse blinding. .PP \&\fBBN_BLINDING_convert()\fR and \fBBN_BLINDING_invert()\fR are wrapper functions for \fBBN_BLINDING_convert_ex()\fR and \fBBN_BLINDING_invert_ex()\fR with \fBr\fR set to \s-1NULL.\s0 .PP \&\fBBN_BLINDING_thread_id()\fR provides access to the \fB\s-1CRYPTO_THREADID\s0\fR object within the \fB\s-1BN_BLINDING\s0\fR structure. This is to help users provide proper locking if needed for multi-threaded use. The \(L"thread id\*(R" object of a newly allocated \fB\s-1BN_BLINDING\s0\fR structure is initialised to the thread id in which \fBBN_BLINDING_new()\fR was called. .PP \&\fBBN_BLINDING_get_flags()\fR returns the \s-1BN_BLINDING\s0 flags. Currently there are two supported flags: \fB\s-1BN_BLINDING_NO_UPDATE\s0\fR and \&\fB\s-1BN_BLINDING_NO_RECREATE\s0\fR. \fB\s-1BN_BLINDING_NO_UPDATE\s0\fR inhibits the automatic update of the \fB\s-1BN_BLINDING\s0\fR parameters after each use and \fB\s-1BN_BLINDING_NO_RECREATE\s0\fR inhibits the automatic re-creation of the \fB\s-1BN_BLINDING\s0\fR parameters after a fixed number of uses (currently 32). In newly allocated \fB\s-1BN_BLINDING\s0\fR objects no flags are set. \&\fBBN_BLINDING_set_flags()\fR sets the \fB\s-1BN_BLINDING\s0\fR parameters flags. .PP \&\fBBN_BLINDING_create_param()\fR creates new \fB\s-1BN_BLINDING\s0\fR parameters using the exponent \fBe\fR and the modulus \fBm\fR. \fBbn_mod_exp\fR and \&\fBm_ctx\fR can be used to pass special functions for exponentiation (normally \fBBN_mod_exp_mont()\fR and \fB\s-1BN_MONT_CTX\s0\fR). .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBBN_BLINDING_new()\fR returns the newly allocated \fB\s-1BN_BLINDING\s0\fR structure or \s-1NULL\s0 in case of an error. .PP \&\fBBN_BLINDING_update()\fR, \fBBN_BLINDING_convert()\fR, \fBBN_BLINDING_invert()\fR, \&\fBBN_BLINDING_convert_ex()\fR and \fBBN_BLINDING_invert_ex()\fR return 1 on success and 0 if an error occurred. .PP \&\fBBN_BLINDING_thread_id()\fR returns a pointer to the thread id object within a \fB\s-1BN_BLINDING\s0\fR object. .PP \&\fBBN_BLINDING_get_flags()\fR returns the currently set \fB\s-1BN_BLINDING\s0\fR flags (a \fBunsigned long\fR value). .PP \&\fBBN_BLINDING_create_param()\fR returns the newly created \fB\s-1BN_BLINDING\s0\fR parameters or \s-1NULL\s0 on error. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBbn\fR\\|(3) .SH "HISTORY" .IX Header "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. .PP 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 .SH "AUTHOR" .IX Header "AUTHOR" Nils Larsch for the OpenSSL project (http://www.openssl.org). Back

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.\" ========================================================================
.\"
.IX Title "BN_BLINDING_new 3"
.TH BN_BLINDING_new 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "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_thread_id, BN_BLINDING_get_flags,
BN_BLINDING_set_flags, BN_BLINDING_create_param \- blinding related BIGNUM
functions.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBBN_BLINDING_new()\fR allocates a new \fB\s-1BN_BLINDING\s0\fR structure and copies
the \fBA\fR and \fBAi\fR values into the newly created \fB\s-1BN_BLINDING\s0\fR object.
.PP
\&\fBBN_BLINDING_free()\fR frees the \fB\s-1BN_BLINDING\s0\fR structure.
.PP
\&\fBBN_BLINDING_update()\fR updates the \fB\s-1BN_BLINDING\s0\fR parameters by squaring
the \fBA\fR and \fBAi\fR or, after specific number of uses and if the
necessary parameters are set, by re-creating the blinding parameters.
.PP
\&\fBBN_BLINDING_convert_ex()\fR multiplies \fBn\fR with the blinding factor \fBA\fR.
If \fBr\fR is not \s-1NULL\s0 a copy the inverse blinding factor \fBAi\fR will be
returned in \fBr\fR (this is useful if a \fB\s-1RSA\s0\fR object is shared among
several threads). \fBBN_BLINDING_invert_ex()\fR multiplies \fBn\fR with the
inverse blinding factor \fBAi\fR. If \fBr\fR is not \s-1NULL\s0 it will be used as
the inverse blinding.
.PP
\&\fBBN_BLINDING_convert()\fR and \fBBN_BLINDING_invert()\fR are wrapper
functions for \fBBN_BLINDING_convert_ex()\fR and \fBBN_BLINDING_invert_ex()\fR
with \fBr\fR set to \s-1NULL.\s0
.PP
\&\fBBN_BLINDING_thread_id()\fR provides access to the \fB\s-1CRYPTO_THREADID\s0\fR
object within the \fB\s-1BN_BLINDING\s0\fR structure. This is to help users
provide proper locking if needed for multi-threaded use. The \*(L"thread
id\*(R" object of a newly allocated \fB\s-1BN_BLINDING\s0\fR structure is
initialised to the thread id in which \fBBN_BLINDING_new()\fR was called.
.PP
\&\fBBN_BLINDING_get_flags()\fR returns the \s-1BN_BLINDING\s0 flags. Currently
there are two supported flags: \fB\s-1BN_BLINDING_NO_UPDATE\s0\fR and
\&\fB\s-1BN_BLINDING_NO_RECREATE\s0\fR. \fB\s-1BN_BLINDING_NO_UPDATE\s0\fR inhibits the
automatic update of the \fB\s-1BN_BLINDING\s0\fR parameters after each use
and \fB\s-1BN_BLINDING_NO_RECREATE\s0\fR inhibits the automatic re-creation
of the \fB\s-1BN_BLINDING\s0\fR parameters after a fixed number of uses (currently
32). In newly allocated \fB\s-1BN_BLINDING\s0\fR objects no flags are set.
\&\fBBN_BLINDING_set_flags()\fR sets the \fB\s-1BN_BLINDING\s0\fR parameters flags.
.PP
\&\fBBN_BLINDING_create_param()\fR creates new \fB\s-1BN_BLINDING\s0\fR parameters
using the exponent \fBe\fR and the modulus \fBm\fR. \fBbn_mod_exp\fR and
\&\fBm_ctx\fR can be used to pass special functions for exponentiation
(normally \fBBN_mod_exp_mont()\fR and \fB\s-1BN_MONT_CTX\s0\fR).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBBN_BLINDING_new()\fR returns the newly allocated \fB\s-1BN_BLINDING\s0\fR structure
or \s-1NULL\s0 in case of an error.
.PP
\&\fBBN_BLINDING_update()\fR, \fBBN_BLINDING_convert()\fR, \fBBN_BLINDING_invert()\fR,
\&\fBBN_BLINDING_convert_ex()\fR and \fBBN_BLINDING_invert_ex()\fR return 1 on
success and 0 if an error occurred.
.PP
\&\fBBN_BLINDING_thread_id()\fR returns a pointer to the thread id object
within a \fB\s-1BN_BLINDING\s0\fR object.
.PP
\&\fBBN_BLINDING_get_flags()\fR returns the currently set \fB\s-1BN_BLINDING\s0\fR flags
(a \fBunsigned long\fR value).
.PP
\&\fBBN_BLINDING_create_param()\fR returns the newly created \fB\s-1BN_BLINDING\s0\fR 
parameters or \s-1NULL\s0 on error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBbn\fR\|(3)
.SH "HISTORY"
.IX Header "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.
.PP
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
.SH "AUTHOR"
.IX Header "AUTHOR"
Nils Larsch for the OpenSSL project (http://www.openssl.org).

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