1.Dd $Mdocdate: February 23 2015 $ 2.Dt BN_CMP 3 3.Os 4.Sh NAME 5.Nm BN_cmp , 6.Nm BN_ucmp , 7.Nm BN_is_zero , 8.Nm BN_is_one , 9.Nm BN_is_word , 10.Nm BN_is_odd 11.Nd BIGNUM comparison and test functions 12.Sh SYNOPSIS 13.In openssl/bn.h 14.Ft int 15.Fo BN_cmp 16.Fa "BIGNUM *a" 17.Fa "BIGNUM *b" 18.Fc 19.Ft int 20.Fo BN_ucmp 21.Fa "BIGNUM *a" 22.Fa "BIGNUM *b" 23.Fc 24.Ft int 25.Fo BN_is_zero 26.Fa "BIGNUM *a" 27.Fc 28.Ft int 29.Fo BN_is_one 30.Fa "BIGNUM *a" 31.Fc 32.Ft int 33.Fo BN_is_word 34.Fa "BIGNUM *a" 35.Fa "BN_ULONG w" 36.Fc 37.Ft int 38.Fo BN_is_odd 39.Fa "BIGNUM *a" 40.Fc 41.Sh DESCRIPTION 42.Fn BN_cmp 43compares the numbers 44.Fa a 45and 46.Fa b . 47.Fn BN_ucmp 48compares their absolute values. 49.Pp 50.Fn BN_is_zero , 51.Fn BN_is_one 52and 53.Fn BN_is_word 54test if 55.Fa a 56equals 0, 1, or 57.Fa w 58respectively. 59.Fn BN_is_odd 60tests if a is odd. 61.Pp 62.Fn BN_is_zero , 63.Fn BN_is_one , 64.Fn BN_is_word , 65and 66.Fn BN_is_odd 67are macros. 68.Sh RETURN VALUES 69.Fn BN_cmp 70returns -1 if 71.Fa a Ns < Ns Fa b , 720 if 73.Fa a Ns == Ns Fa b , 74and 1 if 75.Fa a Ns > Ns Fa b . 76.Fn BN_ucmp 77is the same using the absolute values of 78.Fa a 79and 80.Fa b . 81.Pp 82.Fn BN_is_zero , 83.Fn BN_is_one , 84.Fn BN_is_word , 85and 86.Fn BN_is_odd 87return 1 if the condition is true, 0 otherwise. 88.Sh SEE ALSO 89.Xr bn 3 90.Sh HISTORY 91.Fn BN_cmp , 92.Fn BN_ucmp , 93.Fn BN_is_zero , 94.Fn BN_is_one 95and 96.Fn BN_is_word 97are available in all versions of SSLeay and OpenSSL. 98.Fn BN_is_odd 99was added in SSLeay 0.8. 100