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Manpages BN_add_wordSection: OpenSSL (3ssl)Updated: 0.9.6c Index Return to Main Contents NAMEBN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic functions on BIGNUMs with integersSYNOPSIS
#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); DESCRIPTIONThese 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*=b). 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%m). For BN_div_word() and BN_mod_word(), w must not be 0. RETURN VALUESBN_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. SEE ALSObn(3), err(3), BN_add(3)HISTORYBN_add_word() and BN_mod_word() are available in all versions of SSLeay and OpenSSL. BN_div_word() was added in SSLeay 0.8, and BN_sub_word() and BN_mul_word() in SSLeay 0.9.0.
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