Unverified Commit a072e8ac authored by Steven Fackler's avatar Steven Fackler Committed by GitHub
Browse files

Merge pull request #1981 from alex/bn-is-odd-even 

Added is_even and is_odd on BN
parents c4e787ad 24638986

openssl-sys/src/handwritten/bn.rs

+2 −0
Original line number Diff line number Diff line
@@ -32,6 +32,8 @@ extern "C" { 
    pub fn BN_set_negative(bn: *mut BIGNUM, n: c_int);

    #[cfg(any(ossl110, libressl350))]

    pub fn BN_is_negative(b: *const BIGNUM) -> c_int;

    #[cfg(any(ossl110, libressl350))]

    pub fn BN_is_odd(b: *const BIGNUM) -> c_int;



    pub fn BN_div(

        dv: *mut BIGNUM,

openssl/src/bn.rs

+27 −0
Original line number Diff line number Diff line
@@ -335,6 +335,20 @@ impl BigNumRef { 
        unsafe { BN_is_negative(self.as_ptr()) == 1 }

    }



    /// Returns `true` is `self` is even.

    #[corresponds(BN_is_even)]

    #[cfg(any(ossl110, boringssl, libressl350))]

    pub fn is_even(&self) -> bool {

        !self.is_odd()

    }



    /// Returns `true` is `self` is odd.

    #[corresponds(BN_is_odd)]

    #[cfg(any(ossl110, boringssl, libressl350))]

    pub fn is_odd(&self) -> bool {

        unsafe { ffi::BN_is_odd(self.as_ptr()) == 1 }

    }



    /// Returns the number of significant bits in `self`.

    #[corresponds(BN_num_bits)]

    #[allow(clippy::unnecessary_cast)]
@@ -1488,4 +1502,17 @@ mod tests { 
        out.mod_sqrt(&s, &p, &mut ctx).unwrap();

        assert_eq!(out, BigNum::from_hex_str("7C6D179E19B97BDD").unwrap());

    }



    #[test]

    #[cfg(any(ossl110, boringssl, libressl350))]

    fn test_odd_even() {

        let a = BigNum::from_u32(17).unwrap();

        let b = BigNum::from_u32(18).unwrap();



        assert!(a.is_odd());

        assert!(!b.is_odd());



        assert!(!a.is_even());

        assert!(b.is_even());

    }

}