mirror of
https://github.com/BitskiCo/jwk-rs
synced 2024-12-29 12:08:50 +00:00
Refactor PKCS#8 conversion
This commit is contained in:
Nick Hynes
parent
8b1d543598
commit
8aaf3d71c7
@ -12,13 +12,17 @@ edition = "2018"
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base64 = "0.12"
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bitflags = "1.2"
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derive_more = "0.99"
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num-bigint = { version = "0.2", optional = true }
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paste = "0.1"
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serde = { version = "1.0", features = ["derive"] }
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serde_json = "1.0"
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syn = { version = "1.0", features = ["full"] } # required to parse const generics
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thiserror = "1.0"
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yasna = { version = "0.3", optional = true }
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yasna = { version = "0.3", optional = true, features = ["num-bigint"] }
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zeroize = { version = "1.1", features = ["zeroize_derive"] }
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[features]
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conversion = ["yasna"]
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convert = ["num-bigint", "yasna"]
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[dev-dependencies]
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jsonwebtoken = "7.2"
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@ -35,3 +35,8 @@ fn main() {
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let token = jwt::encode(&jwt::Header::default(), &() /* claims */, encoding_key).unwrap();
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}
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```
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## Features
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* `convert` - enables `Key::{to_der, to_pem}`.
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This pulls in the [yasna](https://crates.io/crates/yasna) crate.
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181
src/lib.rs
181
src/lib.rs
@ -8,6 +8,8 @@ mod key_ops;
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mod tests;
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mod utils;
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use std::array::FixedSizeArray;
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use serde::{Deserialize, Serialize};
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use zeroize::Zeroize;
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@ -55,7 +57,7 @@ impl std::str::FromStr for JsonWebKey {
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(
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ES256,
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EC {
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params: Curve::P256 { .. },
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curve: Curve::P256 { .. },
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},
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)
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| (RS256, RSA { .. })
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@ -78,16 +80,20 @@ impl std::fmt::Display for JsonWebKey {
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#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
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#[serde(tag = "kty")]
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pub enum Key {
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/// An elliptic curve, as per [RFC 7518 §6.2](https://tools.ietf.org/html/rfc7518#section-6.2).
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EC {
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#[serde(flatten)]
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params: Curve,
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curve: Curve,
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},
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/// An elliptic curve, as per [RFC 7518 §6.3](https://tools.ietf.org/html/rfc7518#section-6.3).
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/// See also: [RFC 3447](https://tools.ietf.org/html/rfc3447).
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RSA {
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#[serde(flatten)]
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public: RsaPublic,
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#[serde(flatten, default, skip_serializing_if = "Option::is_none")]
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private: Option<RsaPrivate>,
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},
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/// A symmetric key, as per [RFC 7518 §6.4](https://tools.ietf.org/html/rfc7518#section-6.4).
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#[serde(rename = "oct")]
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Symmetric {
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#[serde(rename = "k")]
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@ -102,7 +108,7 @@ impl Key {
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match self {
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Self::Symmetric { .. }
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| Self::EC {
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params: Curve::P256 { d: Some(_), .. },
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curve: Curve::P256 { d: Some(_), .. },
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..
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}
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| Self::RSA {
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@ -125,9 +131,9 @@ impl Key {
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Some(match self {
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Self::Symmetric { .. } => return None,
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Self::EC {
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params: Curve::P256 { x, y, .. },
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curve: Curve::P256 { x, y, .. },
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} => Self::EC {
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params: Curve::P256 {
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curve: Curve::P256 {
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x: x.clone(),
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y: y.clone(),
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d: None,
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@ -141,22 +147,25 @@ impl Key {
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}
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/// If this key is asymmetric, encodes it as PKCS#8.
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#[cfg(feature = "conversion")]
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pub fn to_der(&self) -> Option<Vec<u8>> {
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#[cfg(feature = "convert")]
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pub fn to_der(&self) -> Result<Vec<u8>, PkcsConvertError> {
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use num_bigint::BigUint;
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use yasna::{models::ObjectIdentifier, DERWriter, DERWriterSeq, Tag};
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use crate::utils::pkcs8;
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if let Self::Symmetric { .. } = self {
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return None;
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return Err(PkcsConvertError::NotAsymmetric);
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}
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Some(yasna::construct_der(|writer| match self {
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Ok(match self {
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Self::EC {
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params: Curve::P256 { d, x, y },
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curve: Curve::P256 { d, x, y },
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} => {
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let write_curve_oid = |writer: DERWriter| {
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writer.write_oid(&ObjectIdentifier::from_slice(&[
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1, 2, 840, 10045, 3, 1, 7, // prime256v1
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]));
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};
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let ec_public_oid = ObjectIdentifier::from_slice(&[1, 2, 840, 10045, 2, 1]);
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let prime256v1_oid = ObjectIdentifier::from_slice(&[1, 2, 840, 10045, 3, 1, 7]);
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let oids = &[Some(&ec_public_oid), Some(&prime256v1_oid)];
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let write_public = |writer: DERWriter| {
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let public_bytes: Vec<u8> = [0x04 /* uncompressed */]
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.iter()
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@ -166,93 +175,77 @@ impl Key {
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.collect();
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writer.write_bitvec_bytes(&public_bytes, 8 * (32 * 2 + 1));
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};
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writer.write_sequence(|writer| {
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match d {
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Some(private_point) => {
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match d {
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Some(private_point) => {
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pkcs8::write_private(oids, |writer: &mut DERWriterSeq| {
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writer.next().write_i8(1); // version
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writer.next().write_bytes(private_point.as_ref());
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writer.next().write_bytes(private_point.as_slice());
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writer.next().write_tagged(Tag::context(0), |writer| {
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write_curve_oid(writer);
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writer.write_oid(&prime256v1_oid)
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});
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writer.next().write_tagged(Tag::context(1), |writer| {
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write_public(writer);
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});
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}
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None => {
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writer.next().write_sequence(|writer| {
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writer.next().write_oid(&ObjectIdentifier::from_slice(&[
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1, 2, 840, 10045, 2, 1, // ecPublicKey
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]));
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write_curve_oid(writer.next());
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});
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write_public(writer.next());
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}
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};
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});
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writer.next().write_tagged(Tag::context(1), write_public);
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})
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}
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None => pkcs8::write_public(oids, write_public),
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}
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}
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Self::RSA { public, private } => {
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let write_alg_id = |writer: &mut DERWriterSeq| {
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writer.next().write_oid(&ObjectIdentifier::from_slice(&[
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1, 2, 840, 113549, 1, 1, 1, // rsaEncryption
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]));
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writer.next().write_null(); // parameters
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let rsa_encryption_oid = ObjectIdentifier::from_slice(&[
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1, 2, 840, 113549, 1, 1, 1, // rsaEncryption
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]);
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let oids = &[Some(&rsa_encryption_oid), None];
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let write_bytevec = |writer: DERWriter, vec: &ByteVec| {
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let bigint = BigUint::from_bytes_be(vec.as_slice());
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writer.write_biguint(&bigint);
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};
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let write_public = |writer: &mut DERWriterSeq| {
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writer.next().write_bytes(&*public.n);
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write_bytevec(writer.next(), &public.n);
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writer.next().write_u32(PUBLIC_EXPONENT);
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};
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writer.write_sequence(|writer| {
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match private {
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Some(private) => {
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writer.next().write_i8(0); // version
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writer.next().write_sequence(|writer| {
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write_alg_id(writer);
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});
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writer
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.next()
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.write_tagged(yasna::tags::TAG_OCTETSTRING, |writer| {
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writer.write_sequence(|writer| {
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writer.next().write_i8(0); // version
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write_public(writer);
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writer.next().write_bytes(&private.d);
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if let Some(p) = &private.p {
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writer.next().write_bytes(p);
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}
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if let Some(q) = &private.q {
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writer.next().write_bytes(q);
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}
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if let Some(dp) = &private.dp {
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writer.next().write_bytes(dp);
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}
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if let Some(dq) = &private.dq {
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writer.next().write_bytes(dq);
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}
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if let Some(qi) = &private.qi {
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writer.next().write_bytes(qi);
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}
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});
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});
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let write_private = |writer: &mut DERWriterSeq, private: &RsaPrivate| {
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// https://tools.ietf.org/html/rfc3447#appendix-A.1.2
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writer.next().write_i8(0); // version (two-prime)
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write_public(writer);
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write_bytevec(writer.next(), &private.d);
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macro_rules! write_opt_bytevecs {
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($($param:ident),+) => {{
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$(write_bytevec(writer.next(), private.$param.as_ref().unwrap());)+
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}};
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}
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None => {
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write_alg_id(writer);
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writer
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.next()
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.write_tagged(yasna::tags::TAG_BITSTRING, |writer| {
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writer.write_sequence(|writer| {
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write_public(writer);
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})
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});
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}
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}
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});
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write_opt_bytevecs!(p, q, dp, dq, qi);
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};
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match private {
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Some(
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private
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@
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RsaPrivate {
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d: _,
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p: Some(_),
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q: Some(_),
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dp: Some(_),
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dq: Some(_),
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qi: Some(_),
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},
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) => pkcs8::write_private(oids, |writer| write_private(writer, private)),
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Some(_) => return Err(PkcsConvertError::MissingRsaParams),
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None => pkcs8::write_public(oids, |writer| {
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let body =
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yasna::construct_der(|writer| writer.write_sequence(write_public));
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writer.write_bitvec_bytes(&body, body.len() * 8);
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}),
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}
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}
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Self::Symmetric { .. } => unreachable!("checked above"),
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}))
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})
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}
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/// If this key is asymmetric, encodes it as PKCS#8 with PEM armoring.
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#[cfg(feature = "conversion")]
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pub fn to_pem(&self) -> Option<String> {
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#[cfg(feature = "convert")]
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pub fn to_pem(&self) -> Result<String, PkcsConvertError> {
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use std::fmt::Write;
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let der_b64 = base64::encode(self.to_der()?);
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let key_ty = if self.is_private() {
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@ -272,7 +265,7 @@ impl Key {
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.unwrap();
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}
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writeln!(&mut pem, "-----END {} KEY-----", key_ty).unwrap();
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Some(pem)
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Ok(pem)
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}
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}
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@ -360,8 +353,7 @@ pub enum JsonWebAlgorithm {
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ES256,
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}
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#[derive(thiserror::Error)]
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#[cfg_attr(debug_assertions, derive(Debug))]
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#[derive(Debug, thiserror::Error)]
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pub enum Error {
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#[error(transparent)]
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Serde(#[from] serde_json::Error),
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@ -372,3 +364,12 @@ pub enum Error {
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#[error("mismatched algorithm for key type")]
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MismatchedAlgorithm,
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}
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#[derive(Debug, thiserror::Error)]
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pub enum PkcsConvertError {
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#[error("encoding RSA JWK as PKCS#8 requires specifing all of p, q, dp, dq, qi")]
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MissingRsaParams,
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#[error("a symmetric key can not be encoded using PKCS#8")]
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NotAsymmetric,
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}
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119
src/tests.rs
119
src/tests.rs
@ -2,10 +2,8 @@ use super::*;
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use std::str::FromStr;
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#[test]
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fn deserialize_es256() {
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// Generated using https://mkjwk.org
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let jwk_str = r#"{
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// Generated using https://mkjwk.org
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static P256_JWK_FIXTURE: &str = r#"{
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"kty": "EC",
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"d": "ZoKQ9j4dhIBlMRVrv-QG8P_T9sutv3_95eio9MtpgKg",
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"use": "enc",
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@ -15,13 +13,29 @@ fn deserialize_es256() {
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"y": "TjYZoHnctatEE6NCrKmXQdJJPnNzZEX8nBmZde3AY4k",
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"alg": "ES256"
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}"#;
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let jwk = JsonWebKey::from_str(jwk_str).unwrap();
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static RSA_JWK_FIXTURE: &str = r#"{
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"p": "6AQ4yHef17an_i5LQPHNIxzpH65xWOSf_qCB7q-lXyM",
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"kty": "RSA",
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"q": "tSVfpefCsf1iWmAs1zYvxdEsUiv0VMEuQBtbTijj_OE",
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"d": "Qdp8a8Df5TlMaaloXApNF_3eu8sLHNWbXdg70e5YVTAs0WUfaIf5c3n96RrDDAzmMEwgKnJ7A1NJ9Nlzz4Z0AQ",
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"e": "AQAB",
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"use": "enc",
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"qi": "adhQHH8IGXFfLEMnZ5t_TeCp5zgSwQktJ2lmylxUG0M",
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"dp": "qVnLiKeoSG_Olz17OGBGd4a2sqVFnrjh_51wuaQDdTk",
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"dq": "GL_Ec6xYg2z1FRfyyGyU1lgf0BJFTZcfNI8ISIN5ssE",
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"n": "pCzbcd9kjvg5rfGHdEMWnXo49zbB6FLQ-m0B0BvVp0aojVWYa0xujC-ZP7ZhxByPxyc2PazwFJJi9ivZ_ggRww"
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}"#;
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#[test]
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fn deserialize_es256() {
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let jwk = JsonWebKey::from_str(P256_JWK_FIXTURE).unwrap();
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assert_eq!(
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jwk,
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JsonWebKey {
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key: box Key::EC {
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// The parameters were decoded using a 10-liner Rust script.
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params: Curve::P256 {
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curve: Curve::P256 {
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d: Some(
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[
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102, 130, 144, 246, 62, 29, 132, 128, 101, 49, 21, 107, 191, 228, 6,
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@ -54,7 +68,7 @@ fn deserialize_es256() {
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fn serialize_es256() {
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let jwk = JsonWebKey {
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key: box Key::EC {
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params: Curve::P256 {
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curve: Curve::P256 {
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d: None,
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x: [1u8; 32].into(),
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y: [2u8; 32].into(),
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@ -114,19 +128,7 @@ fn serialize_hs256() {
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#[test]
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fn deserialize_rs256() {
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let jwk_str = r#"{
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"p": "_LSip5o4eaGf25uvwyUq9ubRtKemrCaoCxumoj63Au0",
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"kty": "RSA",
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"q": "l20iLpicEW3uja0Zg2xP6DjZa86bD4IQ3wFXCcKCf1c",
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"d": "Xo0VAHtfV38HwJbAI6X-Fu7vuyoQjnuiSlQhcSjxn0BZfLP_DKxdJ2ANgTGVE0x243YHqhWRHLobbmDcnUuMOQ",
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"e": "AQAB",
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"qi": "2mzAaSr7I1D3vDtOhbWKS9-9ELRHKbAHz4dhn4DSCBo",
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"dp": "-kyswxeVEpyM6wdU2xRobu-HDMn145PSZFY6AX_e460",
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"alg": "RS256",
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"dq": "OqMWE3khJlatg8s-D_hHUSOCfg65WN4C7ng0XiEmK20",
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"n": "lXpGmBoIxj56TpptApaac6V19_7WWbq0a14a5UHBBlkc54NwIUa2X4p9OeK2sy6rLQ_1g1AcSwfsVUy8MP-Riw"
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}"#;
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let jwk = JsonWebKey::from_str(jwk_str).unwrap();
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let jwk = JsonWebKey::from_str(RSA_JWK_FIXTURE).unwrap();
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assert_eq!(
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jwk,
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JsonWebKey {
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@ -262,24 +264,71 @@ fn mismatched_algorithm() {
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);
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}
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#[cfg(feature = "conversion")]
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#[cfg(feature = "convert")]
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#[test]
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fn es256_to_pem() {
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let jwk_str = r#"{
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"kty": "EC",
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"d": "ZoKQ9j4dhIBlMRVrv-QG8P_T9sutv3_95eio9MtpgKg",
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"crv": "P-256",
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"x": "QOMHmv96tVlJv-uNqprnDSKIj5AiLTXKRomXYnav0N0",
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"y": "TjYZoHnctatEE6NCrKmXQdJJPnNzZEX8nBmZde3AY4k"
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}"#;
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let jwk = JsonWebKey::from_str(jwk_str).unwrap();
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fn p256_private_to_pem() {
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// generated using mkjwk, converted using node-jwk-to-pem, verified using openssl
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let jwk = JsonWebKey::from_str(P256_JWK_FIXTURE).unwrap();
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#[rustfmt::skip]
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assert_eq!(
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base64::encode(jwk.key.to_pem().unwrap()),
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jwk.key.to_pem().unwrap(),
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"-----BEGIN PRIVATE KEY-----
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MHcCAQEEIGaCkPY+HYSAZTEVa7/kBvD/0/bLrb9//eXoqPTLaYCooAoGCCqGSM49
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AwEHoUQDQgAEQOMHmv96tVlJv+uNqprnDSKIj5AiLTXKRomXYnav0N1ONhmgedy1
|
||||
q0QTo0KsqZdB0kk+c3NkRfycGZl17cBjiQ==
|
||||
-----END PRIVATE KEY-----"
|
||||
MIGTAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBHkwdwIBAQQgZoKQ9j4dhIBlMRVr
|
||||
v+QG8P/T9sutv3/95eio9MtpgKigCgYIKoZIzj0DAQehRANCAARA4wea/3q1WUm/
|
||||
642qmucNIoiPkCItNcpGiZdidq/Q3U42GaB53LWrRBOjQqypl0HSST5zc2RF/JwZ
|
||||
mXXtwGOJ
|
||||
-----END PRIVATE KEY-----
|
||||
"
|
||||
);
|
||||
}
|
||||
|
||||
#[cfg(feature = "convert")]
|
||||
#[test]
|
||||
fn p256_public_to_pem() {
|
||||
let jwk = JsonWebKey::from_str(P256_JWK_FIXTURE).unwrap();
|
||||
#[rustfmt::skip]
|
||||
assert_eq!(
|
||||
jwk.key.to_public().unwrap().to_pem().unwrap(),
|
||||
"-----BEGIN PUBLIC KEY-----
|
||||
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEQOMHmv96tVlJv+uNqprnDSKIj5Ai
|
||||
LTXKRomXYnav0N1ONhmgedy1q0QTo0KsqZdB0kk+c3NkRfycGZl17cBjiQ==
|
||||
-----END PUBLIC KEY-----
|
||||
"
|
||||
);
|
||||
}
|
||||
|
||||
#[cfg(feature = "convert")]
|
||||
#[test]
|
||||
fn rsa_private_to_pem() {
|
||||
let jwk = JsonWebKey::from_str(RSA_JWK_FIXTURE).unwrap();
|
||||
#[rustfmt::skip]
|
||||
assert_eq!(
|
||||
jwk.key.to_pem().unwrap(),
|
||||
"-----BEGIN PRIVATE KEY-----
|
||||
MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEApCzbcd9kjvg5rfGH
|
||||
dEMWnXo49zbB6FLQ+m0B0BvVp0aojVWYa0xujC+ZP7ZhxByPxyc2PazwFJJi9ivZ
|
||||
/ggRwwIDAQABAkBB2nxrwN/lOUxpqWhcCk0X/d67ywsc1Ztd2DvR7lhVMCzRZR9o
|
||||
h/lzef3pGsMMDOYwTCAqcnsDU0n02XPPhnQBAiEA6AQ4yHef17an/i5LQPHNIxzp
|
||||
H65xWOSf/qCB7q+lXyMCIQC1JV+l58Kx/WJaYCzXNi/F0SxSK/RUwS5AG1tOKOP8
|
||||
4QIhAKlZy4inqEhvzpc9ezhgRneGtrKlRZ644f+dcLmkA3U5AiAYv8RzrFiDbPUV
|
||||
F/LIbJTWWB/QEkVNlx80jwhIg3mywQIgadhQHH8IGXFfLEMnZ5t/TeCp5zgSwQkt
|
||||
J2lmylxUG0M=
|
||||
-----END PRIVATE KEY-----
|
||||
"
|
||||
);
|
||||
}
|
||||
|
||||
#[cfg(feature = "convert")]
|
||||
#[test]
|
||||
fn rsa_public_to_pem() {
|
||||
let jwk = JsonWebKey::from_str(RSA_JWK_FIXTURE).unwrap();
|
||||
#[rustfmt::skip]
|
||||
assert_eq!(
|
||||
jwk.key.to_public().unwrap().to_pem().unwrap(),
|
||||
"-----BEGIN PUBLIC KEY-----
|
||||
MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKQs23HfZI74Oa3xh3RDFp16OPc2wehS
|
||||
0PptAdAb1adGqI1VmGtMbowvmT+2YcQcj8cnNj2s8BSSYvYr2f4IEcMCAwEAAQ==
|
||||
-----END PUBLIC KEY-----
|
||||
"
|
||||
);
|
||||
}
|
||||
|
||||
50
src/utils.rs
50
src/utils.rs
@ -30,3 +30,53 @@ pub fn deserialize_base64<'de, D: Deserializer<'de>>(d: D) -> Result<Vec<u8>, D:
|
||||
de::Error::custom(err_msg.strip_suffix(".").unwrap_or(&err_msg))
|
||||
})
|
||||
}
|
||||
|
||||
#[cfg(feature = "convert")]
|
||||
pub mod pkcs8 {
|
||||
use yasna::{
|
||||
models::{ObjectIdentifier, TaggedDerValue},
|
||||
DERWriter, DERWriterSeq,
|
||||
};
|
||||
|
||||
fn write_oids(writer: &mut DERWriterSeq, oids: &[Option<&ObjectIdentifier>]) {
|
||||
for oid in oids {
|
||||
match oid {
|
||||
Some(oid) => writer.next().write_oid(oid),
|
||||
None => writer.next().write_null(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn write_private(
|
||||
oids: &[Option<&ObjectIdentifier>],
|
||||
body_writer: impl FnOnce(&mut DERWriterSeq),
|
||||
) -> Vec<u8> {
|
||||
yasna::construct_der(|writer| {
|
||||
writer.write_sequence(|writer| {
|
||||
writer.next().write_i8(0); // version
|
||||
writer
|
||||
.next()
|
||||
.write_sequence(|writer| write_oids(writer, oids));
|
||||
|
||||
let body = yasna::construct_der(|writer| writer.write_sequence(body_writer));
|
||||
writer
|
||||
.next()
|
||||
.write_tagged_der(&TaggedDerValue::from_octetstring(body));
|
||||
})
|
||||
})
|
||||
}
|
||||
|
||||
pub fn write_public(
|
||||
oids: &[Option<&ObjectIdentifier>],
|
||||
body_writer: impl FnOnce(DERWriter),
|
||||
) -> Vec<u8> {
|
||||
yasna::construct_der(|writer| {
|
||||
writer.write_sequence(|writer| {
|
||||
writer
|
||||
.next()
|
||||
.write_sequence(|writer| write_oids(writer, oids));
|
||||
body_writer(writer.next());
|
||||
})
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user