Manual Pages for UNIX Operating System command usage for man BN_mod_word

OpenSSL                                     BN_add_word(3openssl)



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

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      #include 

      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);


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     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 wwww to aaaa (a+=w).

     BN_sub_word() subtracts wwww from aaaa (a-=w).

     BN_mul_word() multiplies aaaa and wwww (a*=w).

     BN_div_word() divides aaaa by wwww (a/=w) and returns the
     remainder.

     BN_mod_word() returns the remainder of aaaa divided by wwww (a%w).

     For BN_div_word() and BN_mod_word(), wwww must not be 0.

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     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 aaaa%wwww on success and
     ((((BBBBNNNN_UUUULLLLOOOONNNNGGGG))))----1111 if an error occurred.

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     bn(3), ERR_get_error(3), BN_add(3)

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     BN_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.



25/Jul/2005            Last change: 0.9.8o                      1






OpenSSL                                     BN_add_word(3openssl)



     Before 0.9.8a the return value for BN_div_word() and
     BN_mod_word() in case of an error was 0.





















































25/Jul/2005            Last change: 0.9.8o                      2