1BN_ADD_WORD(3) OpenSSL BN_ADD_WORD(3)
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6 BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word -
7 arithmetic functions on BIGNUMs with integers
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10 #include <openssl/bn.h>
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12 int BN_add_word(BIGNUM *a, BN_ULONG w);
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14 int BN_sub_word(BIGNUM *a, BN_ULONG w);
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16 int BN_mul_word(BIGNUM *a, BN_ULONG w);
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18 BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w);
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20 BN_ULONG BN_mod_word(const BIGNUM *a, BN_ULONG w);
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23 These functions perform arithmetic operations on BIGNUMs with unsigned
24 integers. They are much more efficient than the normal BIGNUM
25 arithmetic operations.
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27 BN_add_word() adds w to a ("a+=w").
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29 BN_sub_word() subtracts w from a ("a-=w").
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31 BN_mul_word() multiplies a and w ("a*=w").
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33 BN_div_word() divides a by w ("a/=w") and returns the remainder.
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35 BN_mod_word() returns the remainder of a divided by w ("a%w").
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37 For BN_div_word() and BN_mod_word(), w must not be 0.
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40 BN_add_word(), BN_sub_word() and BN_mul_word() return 1 for success, 0
41 on error. The error codes can be obtained by ERR_get_error(3).
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43 BN_mod_word() and BN_div_word() return a%w on success and (BN_ULONG)-1
44 if an error occurred.
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47 ERR_get_error(3), BN_add(3)
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50 Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
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52 Licensed under the OpenSSL license (the "License"). You may not use
53 this file except in compliance with the License. You can obtain a copy
54 in the file LICENSE in the source distribution or at
55 <https://www.openssl.org/source/license.html>.
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591.1.1d 2019-10-03 BN_ADD_WORD(3)