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use ffi;
use std::cmp;
use libc::c_long;
use std::ptr;
use {cvt, cvt_p, init};
use error::ErrorStack;
use nid::Nid;
use types::OpenSslTypeRef;
type_!(EcKey, EcKeyRef, ffi::EC_KEY, ffi::EC_KEY_free);
impl EcKeyRef {
/// Serializes the private key components to DER.
pub fn private_key_to_der(&self) -> Result<Vec<u8>, ErrorStack> {
unsafe {
let len = try!(cvt(ffi::i2d_ECPrivateKey(self.as_ptr(), ptr::null_mut())));
let mut buf = vec![0; len as usize];
try!(cvt(ffi::i2d_ECPrivateKey(self.as_ptr(), &mut buf.as_mut_ptr())));
Ok(buf)
}
}
}
impl EcKey {
pub fn new_by_curve_name(nid: Nid) -> Result<EcKey, ErrorStack> {
unsafe {
init();
cvt_p(ffi::EC_KEY_new_by_curve_name(nid.as_raw())).map(EcKey)
}
}
/// Deserializes a DER-encoded private key.
pub fn private_key_from_der(der: &[u8]) -> Result<EcKey, ErrorStack> {
unsafe {
init();
let len = cmp::min(der.len(), c_long::max_value() as usize) as c_long;
cvt_p(ffi::d2i_ECPrivateKey(ptr::null_mut(), &mut der.as_ptr(), len)).map(EcKey)
}
}
private_key_from_pem!(EcKey, ffi::PEM_read_bio_ECPrivateKey);
}
#[cfg(test)]
mod test {
use nid;
use super::*;
#[test]
fn new_by_curve_name() {
EcKey::new_by_curve_name(nid::X9_62_PRIME256V1).unwrap();
}
}
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