← Back
Editing: BN_BLINDING_invert.3
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .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).
Save File
Cancel