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Merge pull request #1039 from 1aim/asn1num-from-bn 

Add `Asn1Integer::from_bn`
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Steven Fackler 2019-01-18 09:05:16 -08:00 committed by GitHub
parent 79abbeaa81 6378eff9db
commit e3be399dea
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1 changed files with 35 additions and 1 deletions
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36
openssl/src/asn1.rs
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@ -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 +191,19 @@ foreign_type_and_impl_send_sync! {
pub struct Asn1IntegerRef;
}
impl Asn1Integer {
/// Converts a bignum to an `Asn1Integer`.
///
/// Corresponds to [`BN_to_ASN1_INTEGER`]. Also see
/// [`BigNumRef::to_asn1_integer`].
///
/// [`BN_to_ASN1_INTEGER`]: https://www.openssl.org/docs/man1.1.0/crypto/BN_to_ASN1_INTEGER.html
/// [`BigNumRef::to_asn1_integer`]: ../bn/struct.BigNumRef.html#method.to_asn1_integer
pub fn from_bn(bn: &BigNumRef) -> Result<Self, ErrorStack> {
bn.to_asn1_integer()
}
}
impl Asn1IntegerRef {
#[allow(missing_docs)]
#[deprecated(since = "0.10.6", note = "use to_bn instead")]
@ -306,3 +319,24 @@ 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());
}
}