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 OpenSSL license (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>.