NAME

       BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic functions on BIGNUMs with
       integers

SYNOPSIS

        #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);

DESCRIPTION

       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.

SEE ALSO

       ERR_get_error(3), BN_add(3)

COPYRIGHT

       Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except in compliance
       with the License.  You can obtain a copy in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.