BN_cmp3ssl
Bignum comparison and test functions
Usage
#include <openssl/bn.h>int BN_cmp(const BIGNUM *a, const BIGNUM *b);int BN_ucmp(const BIGNUM *a, const BIGNUM *b);int BN_is_zero(const BIGNUM *a);int BN_is_one(const BIGNUM *a);int BN_is_word(const BIGNUM *a, const BN_ULONG w);int BN_abs_is_word(const BIGNUM *a, const BN_ULONG w);int BN_is_odd(const BIGNUM *a);int BN_are_coprime(BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
Overview
BN_cmp() compares the numbers a and b. BN_ucmp() compares their absolute values.
BN_is_zero(), BN_is_one(), BN_is_word() and BN_abs_is_word() test if a equals 0, 1, w, or |w| respectively. BN_is_odd() tests if a is odd.
BN_are_coprime() determines if a and b are coprime. ctx is used internally for storing temporary variables. The values of a and b and ctx must not be NULL.
Return values
BN_cmp() returns -1 if a < b, 0 if a == b and 1 if a > b. BN_ucmp() is the same using the absolute values of a and b.
BN_is_zero(), BN_is_one() BN_is_word(), BN_abs_is_word() and BN_is_odd() return 1 if the condition is true, 0 otherwise.
BN_are_coprime() returns 1 if the BIGNUM's are coprime, otherwise it returns 0.
Releases
13 releases since Debian 3.0 (Woody); the text changed 12 times.