Commit 4ff5f448 authored by Jonas Schievink's avatar Jonas Schievink
Browse files

Add `Asn1Integer::from_bn`

parent 79abbeaa

openssl/src/asn1.rs

+36 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ use std::slice; 
use std::str;



use bio::MemBio;

use bn::BigNum;

use bn::{BigNum, BigNumRef};

use error::ErrorStack;

use nid::Nid;

use string::OpensslString;
@@ -191,6 +191,20 @@ foreign_type_and_impl_send_sync! { 
    pub struct Asn1IntegerRef;

}



impl Asn1Integer {

    /// Converts a bignum to an `Asn1Integer`.

    ///

    /// Corresponds to [`BN_to_ASN1_INTEGER`].

    ///

    /// [`BN_to_ASN1_INTEGER`]: https://www.openssl.org/docs/man1.1.0/crypto/BN_to_ASN1_INTEGER.html

    pub fn from_bn(bn: &BigNumRef) -> Result<Self, ErrorStack> {

        unsafe {

            cvt_p(::ffi::BN_to_ASN1_INTEGER(bn.as_ptr(), ptr::null_mut()))

                .map(|p| Asn1Integer::from_ptr(p))

        }

    }

}



impl Asn1IntegerRef {

    #[allow(missing_docs)]

    #[deprecated(since = "0.10.6", note = "use to_bn instead")]
@@ -306,3 +320,24 @@ cfg_if! { 
        }

    }

}



#[cfg(test)]

mod tests {

    use super::*;



    use bn::BigNum;



    /// Tests conversion between BigNum and Asn1Integer.

    #[test]

    fn bn_cvt() {

        fn roundtrip(bn: BigNum) {

            let large = Asn1Integer::from_bn(&bn).unwrap();

            assert_eq!(large.to_bn().unwrap(), bn);

        }



        roundtrip(BigNum::from_dec_str("1000000000000000000000000000000000").unwrap());

        roundtrip(-BigNum::from_dec_str("1000000000000000000000000000000000").unwrap());

        roundtrip(BigNum::from_u32(1234).unwrap());

        roundtrip(-BigNum::from_u32(1234).unwrap());

    }

}