BN_add_word3ssl
Arithmetic functions on bignums with integers
Usage
#include <openssl/bn.h>int BN_add_word(BIGNUM *a, BN_ULONG w);int BN_sub_word(BIGNUM *a, BN_ULONG w);int BN_mul_word(BIGNUM *a, BN_ULONG w);BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
Overview
These functions perform arithmetic operations on BIGNUMs with unsigned integers. They are much more efficient than the normal BIGNUM arithmetic operations.
BN_add_word() adds w to a ("a+=w").
BN_sub_word() subtracts w from a ("a-=w").
BN_mul_word() multiplies a and w ("a*=w").
BN_div_word() divides a by w ("a/=w") and returns the remainder.
BN_mod_word() returns the remainder of a divided by w ("a%w").
For BN_div_word() and BN_mod_word(), w must not be 0.
Return values
BN_add_word(), BN_sub_word() and BN_mul_word() return 1 for success, 0 on error. The error codes can be obtained by ERR_get_error(3).
BN_mod_word() and BN_div_word() return a%w on success and (BN_ULONG)-1 if an error occurred.
Releases
13 releases since Debian 3.0 (Woody); the text changed 12 times.