BN_BLINDING_new(3)
- NetBSD Manual Pages
BN_BLINDING_new(3) OpenSSL BN_BLINDING_new(3)
NAME
BN_BLINDING_new, BN_BLINDING_free, BN_BLINDING_update, BN_BLINDING_con-
vert, BN_BLINDING_invert, BN_BLINDING_convert_ex, BN_BLIND-
ING_invert_ex, BN_BLINDING_set_thread, BN_BLINDING_cmp_thread,
BN_BLINDING_get_flags, BN_BLINDING_set_flags, BN_BLINDING_create_param
- blinding related BIGNUM functions.
LIBRARY
libcrypto, -lcrypto
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);
void BN_BLINDING_set_thread(BN_BLINDING *);
int BN_BLINDING_cmp_thread(const BN_BLINDING *,
const CRYPTO_THREADID *);
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);
DESCRIPTION
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.
BN_BLINDING_update() updates the BN_BLINDING parameters by squaring the
A and Ai or, after specific number of uses and if the necessary parame-
ters 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 amoung 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_set_thread() and BN_BLINDING_cmp_thread() set and compare
the "thread id" of the BN_BLINDING structure, allowing users of the
BN_BLINDING structure to provide proper locking if needed for multi-
threaded use.
BN_BLINDING_get_flags() returns the BN_BLINDING flags. Currently there
are two supported flags: BN_BLINDING_NO_UPDATE and BN_BLIND-
ING_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).
RETURN VALUES
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 suc-
cess and 0 if an error occured.
BN_BLINDING_get_thread_id() returns the thread id (a unsigned long
value) or 0 if not set. BN_BLINDING_cmp_thread() returns 0 if the
thread id associated with the BN_BLINDING structure equals the provided
thread id (which can be obtained by CRYPTO_THREADID_set()), otherwise
it returns -1 or +1 to indicate the thread ids are different (if the
target architecture supports ordering of thread ids, this follows the
traditional "cmp" semantics of memcmp() or strcmp()).
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 param-
eters or NULL on error.
SEE ALSO
openssl_bn(3)
HISTORY
BN_BLINDING_convert_ex, BN_BLINDIND_invert_ex, BN_BLIND-
ING_get_thread_id, BN_BLINDING_set_thread_id, BN_BLINDING_set_flags,
BN_BLINDING_get_flags and BN_BLINDING_create_param were first intro-
duced in OpenSSL 0.9.8
BN_BLINDING_get_thread_idptr, BN_BLINDING_set_thread_idptr were first
introduced in OpenSSL 0.9.9
BN_BLINDING_get_thread_id, BN_BLINDING_set_thread_id, BN_BLIND-
ING_get_thread_idptr, BN_BLINDING_set_thread_idptr were all deprecated
in favour of BN_BLINDING_set_thread, BN_BLINDING_cmp_thread which were
introduced in OpenSSL 0.9.9
AUTHOR
Nils Larsch for the OpenSSL project (http://www.openssl.org).
0.9.9-dev 2008-05-09 BN_BLINDING_new(3)
Powered by man-cgi (2024-03-20).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.