use crate::Result;
#[cfg(feature = "alloc")]
use der::SecretDocument;
#[cfg(feature = "pem")]
use {crate::LineEnding, alloc::string::String, der::pem::PemLabel};
#[cfg(feature = "pkcs8")]
use {
crate::{EcPrivateKey, ALGORITHM_OID},
der::Decode,
};
#[cfg(feature = "std")]
use std::path::Path;
#[cfg(feature = "pem")]
use zeroize::Zeroizing;
pub trait DecodeEcPrivateKey: Sized {
fn from_sec1_der(bytes: &[u8]) -> Result<Self>;
#[cfg(feature = "pem")]
fn from_sec1_pem(s: &str) -> Result<Self> {
let (label, doc) = SecretDocument::from_pem(s)?;
EcPrivateKey::validate_pem_label(label)?;
Self::from_sec1_der(doc.as_bytes())
}
#[cfg(feature = "std")]
fn read_sec1_der_file(path: impl AsRef<Path>) -> Result<Self> {
Self::from_sec1_der(SecretDocument::read_der_file(path)?.as_bytes())
}
#[cfg(all(feature = "pem", feature = "std"))]
fn read_sec1_pem_file(path: impl AsRef<Path>) -> Result<Self> {
let (label, doc) = SecretDocument::read_pem_file(path)?;
EcPrivateKey::validate_pem_label(&label)?;
Self::from_sec1_der(doc.as_bytes())
}
}
#[cfg(feature = "alloc")]
pub trait EncodeEcPrivateKey {
fn to_sec1_der(&self) -> Result<SecretDocument>;
#[cfg(feature = "pem")]
fn to_sec1_pem(&self, line_ending: LineEnding) -> Result<Zeroizing<String>> {
let doc = self.to_sec1_der()?;
Ok(doc.to_pem(EcPrivateKey::PEM_LABEL, line_ending)?)
}
#[cfg(feature = "std")]
fn write_sec1_der_file(&self, path: impl AsRef<Path>) -> Result<()> {
Ok(self.to_sec1_der()?.write_der_file(path)?)
}
#[cfg(all(feature = "pem", feature = "std"))]
fn write_sec1_pem_file(&self, path: impl AsRef<Path>, line_ending: LineEnding) -> Result<()> {
let doc = self.to_sec1_der()?;
Ok(doc.write_pem_file(path, EcPrivateKey::PEM_LABEL, line_ending)?)
}
}
#[cfg(feature = "pkcs8")]
impl<T> DecodeEcPrivateKey for T
where
T: for<'a> TryFrom<pkcs8::PrivateKeyInfo<'a>, Error = pkcs8::Error>,
{
fn from_sec1_der(private_key: &[u8]) -> Result<Self> {
let params_oid = EcPrivateKey::from_der(private_key)?
.parameters
.and_then(|params| params.named_curve());
let algorithm = pkcs8::AlgorithmIdentifierRef {
oid: ALGORITHM_OID,
parameters: params_oid.as_ref().map(Into::into),
};
Ok(Self::try_from(pkcs8::PrivateKeyInfo {
algorithm,
private_key,
public_key: None,
})?)
}
}
#[cfg(all(feature = "alloc", feature = "pkcs8"))]
impl<T: pkcs8::EncodePrivateKey> EncodeEcPrivateKey for T {
fn to_sec1_der(&self) -> Result<SecretDocument> {
let doc = self.to_pkcs8_der()?;
let pkcs8_key = pkcs8::PrivateKeyInfo::from_der(doc.as_bytes())?;
pkcs8_key.algorithm.assert_algorithm_oid(ALGORITHM_OID)?;
let mut pkcs1_key = EcPrivateKey::from_der(pkcs8_key.private_key)?;
pkcs1_key.parameters = Some(pkcs8_key.algorithm.parameters_oid()?.into());
pkcs1_key.try_into()
}
}