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+.\" ========================================================================
+.\"
+.IX Title "BN_BLINDING_new 3"
+.TH BN_BLINDING_new 3 "2014-10-15" "1.0.1j" "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_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"
+\&\fIBN_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
+\&\fIBN_BLINDING_free()\fR frees the \fB\s-1BN_BLINDING\s0\fR structure.
+.PP
+\&\fIBN_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
+\&\fIBN_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). \fIBN_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
+\&\fIBN_BLINDING_convert()\fR and \fIBN_BLINDING_invert()\fR are wrapper
+functions for \fIBN_BLINDING_convert_ex()\fR and \fIBN_BLINDING_invert_ex()\fR
+with \fBr\fR set to \s-1NULL\s0.
+.PP
+\&\fIBN_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 \fIBN_BLINDING_new()\fR was called.
+.PP
+\&\fIBN_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.
+\&\fIBN_BLINDING_set_flags()\fR sets the \fB\s-1BN_BLINDING\s0\fR parameters flags.
+.PP
+\&\fIBN_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 \fIBN_mod_exp_mont()\fR and \fB\s-1BN_MONT_CTX\s0\fR).
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fIBN_BLINDING_new()\fR returns the newly allocated \fB\s-1BN_BLINDING\s0\fR structure
+or \s-1NULL\s0 in case of an error.
+.PP
+\&\fIBN_BLINDING_update()\fR, \fIBN_BLINDING_convert()\fR, \fIBN_BLINDING_invert()\fR,
+\&\fIBN_BLINDING_convert_ex()\fR and \fIBN_BLINDING_invert_ex()\fR return 1 on
+success and 0 if an error occured.
+.PP
+\&\fIBN_BLINDING_thread_id()\fR returns a pointer to the thread id object
+within a \fB\s-1BN_BLINDING\s0\fR object.
+.PP
+\&\fIBN_BLINDING_get_flags()\fR returns the currently set \fB\s-1BN_BLINDING\s0\fR flags
+(a \fBunsigned long\fR value).
+.PP
+\&\fIBN_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"
+\&\fIbn\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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