BN_mul man page on OpenBSD

Man page or keyword search:  
man Server   11362 pages
apropos Keyword Search (all sections)
Output format
OpenBSD logo
[printable version]

BN_ADD(3)			    OpenSSL			     BN_ADD(3)

NAME
       BN_add, BN_sub, BN_mul, BN_sqr, BN_div, BN_mod, BN_nnmod, BN_mod_add,
       BN_mod_sub, BN_mod_mul, BN_mod_sqr, BN_exp, BN_mod_exp, BN_gcd -
       arithmetic operations on BIGNUMs

SYNOPSIS
	#include <openssl/bn.h>

	int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);

	int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);

	int BN_mul(BIGNUM *r, BIGNUM *a, BIGNUM *b, BN_CTX *ctx);

	int BN_sqr(BIGNUM *r, BIGNUM *a, BN_CTX *ctx);

	int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *a, const BIGNUM *d,
		BN_CTX *ctx);

	int BN_mod(BIGNUM *rem, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);

	int BN_nnmod(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);

	int BN_mod_add(BIGNUM *r, BIGNUM *a, BIGNUM *b, const BIGNUM *m,
		BN_CTX *ctx);

	int BN_mod_sub(BIGNUM *r, BIGNUM *a, BIGNUM *b, const BIGNUM *m,
		BN_CTX *ctx);

	int BN_mod_mul(BIGNUM *r, BIGNUM *a, BIGNUM *b, const BIGNUM *m,
		BN_CTX *ctx);

	int BN_mod_sqr(BIGNUM *r, BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);

	int BN_exp(BIGNUM *r, BIGNUM *a, BIGNUM *p, BN_CTX *ctx);

	int BN_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
		const BIGNUM *m, BN_CTX *ctx);

	int BN_gcd(BIGNUM *r, BIGNUM *a, BIGNUM *b, BN_CTX *ctx);

DESCRIPTION
       BN_add() adds a and b and places the result in r ("r=a+b").  r may be
       the same BIGNUM as a or b.

       BN_sub() subtracts b from a and places the result in r ("r=a-b").

       BN_mul() multiplies a and b and places the result in r ("r=a*b").  r
       may be the same BIGNUM as a or b.  For multiplication by powers of 2,
       use BN_lshift(3).

       BN_sqr() takes the square of a and places the result in r ("r=a^2"). r
       and a may be the same BIGNUM.  This function is faster than
       BN_mul(r,a,a).

       BN_div() divides a by d and places the result in dv and the remainder
       in rem ("dv=a/d, rem=a%d"). Either of dv and rem may be NULL, in which
       case the respective value is not returned.  The result is rounded
       towards zero; thus if a is negative, the remainder will be zero or
       negative.  For division by powers of 2, use BN_rshift(3).

       BN_mod() corresponds to BN_div() with dv set to NULL.

       BN_nnmod() reduces a modulo m and places the non-negative remainder in
       r.

       BN_mod_add() adds a to b modulo m and places the non-negative result in
       r.

       BN_mod_sub() subtracts b from a modulo m and places the non-negative
       result in r.

       BN_mod_mul() multiplies a by b and finds the non-negative remainder
       respective to modulus m ("r=(a*b) mod m"). r may be the same BIGNUM as
       a or b. For more efficient algorithms for repeated computations using
       the same modulus, see BN_mod_mul_montgomery(3) and
       BN_mod_mul_reciprocal(3).

       BN_mod_sqr() takes the square of a modulo m and places the result in r.

       BN_exp() raises a to the p-th power and places the result in r
       ("r=a^p"). This function is faster than repeated applications of
       BN_mul().

       BN_mod_exp() computes a to the p-th power modulo m ("r=a^p % m"). This
       function uses less time and space than BN_exp().

       BN_gcd() computes the greatest common divisor of a and b and places the
       result in r. r may be the same BIGNUM as a or b.

       For all functions, ctx is a previously allocated BN_CTX used for
       temporary variables; see BN_CTX_new(3).

       Unless noted otherwise, the result BIGNUM must be different from the
       arguments.

RETURN VALUES
       For all functions, 1 is returned for success, 0 on error. The return
       value should always be checked (e.g., "if (!BN_add(r,a,b)) goto err;").
       The error codes can be obtained by ERR_get_error(3).

SEE ALSO
       bn(3), ERR_get_error(3), BN_CTX_new(3), BN_add_word(3), BN_set_bit(3)

HISTORY
       BN_add(), BN_sub(), BN_sqr(), BN_div(), BN_mod(), BN_mod_mul(),
       BN_mod_exp() and BN_gcd() are available in all versions of SSLeay and
       OpenSSL. The ctx argument to BN_mul() was added in SSLeay 0.9.1b.
       BN_exp() appeared in SSLeay 0.9.0.  BN_nnmod(), BN_mod_add(),
       BN_mod_sub(), and BN_mod_sqr() were added in OpenSSL 0.9.7.

OpenBSD 4.9							  May 14, 2002
[top]

List of man pages available for OpenBSD

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net