added ECDSA secp256k1 signing

Author: mkmks

Cargo.toml

@@ -23,6 +23,6 @@ pki-types = { package = "rustls-pki-types", version = "1.4.1" }
 ring = "0.17"
 rustls-webpki = { version = "0.103", features = ["ring", "std"] }
 time = { version = "0.3.6", default-features = false }
-x509-parser = "0.18"
+x509-parser = { version = "0.18", features = ["verify"] }
 yasna = { version = "0.5.2", features = ["time", "std"] }
 zeroize = { version = "1.2" }

rcgen/src/key_pair.rs

@@ -264,7 +264,13 @@ impl KeyPair {
 			KeyPairKind::Rsa(rsakp, &signature::RSA_PSS_SHA256)
 		} else {
 			#[cfg(feature = "aws_lc_rs")]
-			if alg == &PKCS_ECDSA_P521_SHA512 {
+			if alg == &PKCS_ECDSA_P256K1_SHA256 {
+				KeyPairKind::Ec(ecdsa_from_pkcs8(
+					&signature::ECDSA_P256K1_SHA256_ASN1_SIGNING,
+					&serialized_der,
+					rng,
+				)?)
+			} else if alg == &PKCS_ECDSA_P521_SHA512 {
 				KeyPairKind::Ec(ecdsa_from_pkcs8(
 					&signature::ECDSA_P521_SHA512_ASN1_SIGNING,
 					&serialized_der,
@@ -784,6 +790,8 @@ mod test {
 		for alg in [
 			&PKCS_ED25519,
 			&PKCS_ECDSA_P256_SHA256,
+			#[cfg(feature = "aws_lc_rs")]
+			&PKCS_ECDSA_P256K1_SHA256,
 			&PKCS_ECDSA_P384_SHA384,
 			#[cfg(feature = "aws_lc_rs")]
 			&PKCS_ECDSA_P521_SHA512,

rcgen/src/oid.rs

@@ -16,6 +16,10 @@ pub(crate) const COMMON_NAME: &[u64] = &[2, 5, 4, 3];
 
 /// id-ecPublicKey in [RFC 5480](https://datatracker.ietf.org/doc/html/rfc5480#appendix-A)
 pub(crate) const EC_PUBLIC_KEY: &[u64] = &[1, 2, 840, 10045, 2, 1];
+/// secp256k1 in [SEC 2, Appendix A.2.1](https://www.secg.org/sec2-v2.pdf)
+/// Currently this is only supported with the `aws_lc_rs` feature
+#[cfg(feature = "aws_lc_rs")]
+pub(crate) const EC_SECP_256_K1: &[u64] = &[1, 3, 132, 0, 10];
 /// secp256r1 in [RFC 5480](https://datatracker.ietf.org/doc/html/rfc5480#appendix-A)
 pub(crate) const EC_SECP_256_R1: &[u64] = &[1, 2, 840, 10045, 3, 1, 7];
 /// secp384r1 in [RFC 5480](https://datatracker.ietf.org/doc/html/rfc5480#appendix-A)

rcgen/src/sign_algo.rs

@@ -64,7 +64,9 @@ impl fmt::Debug for SignatureAlgorithm {
 			write!(f, "PKCS_ED25519")
 		} else {
 			#[cfg(feature = "aws_lc_rs")]
-			if self == &PKCS_ECDSA_P521_SHA512 {
+			if self == &PKCS_ECDSA_P256K1_SHA256 {
+				return write!(f, "PKCS_ECDSA_P256K1_SHA256");
+			} else if self == &PKCS_ECDSA_P521_SHA512 {
 				return write!(f, "PKCS_ECDSA_P521_SHA512");
 			}
 
@@ -97,6 +99,8 @@ impl SignatureAlgorithm {
 			&PKCS_RSA_SHA512,
 			//&PKCS_RSA_PSS_SHA256,
 			&PKCS_ECDSA_P256_SHA256,
+			#[cfg(feature = "aws_lc_rs")]
+			&PKCS_ECDSA_P256K1_SHA256,
 			&PKCS_ECDSA_P384_SHA384,
 			#[cfg(feature = "aws_lc_rs")]
 			&PKCS_ECDSA_P521_SHA512,
@@ -172,7 +176,19 @@ pub(crate) mod algo {
 		},
 	};
 
-	/// ECDSA signing using the P-256 curves and SHA-256 hashing as per [RFC 5758](https://tools.ietf.org/html/rfc5758#section-3.2)
+	/// ECDSA signing using the K-256 curves and SHA-256 hashing as per [SEC 2, Section 2.4.1](https://www.secg.org/sec2-v2.pdf)
+	/// Currently this is only supported with the `aws_lc_rs` feature
+	#[cfg(feature = "aws_lc_rs")]
+	pub static PKCS_ECDSA_P256K1_SHA256: SignatureAlgorithm = SignatureAlgorithm {
+		oids_sign_alg: &[&EC_PUBLIC_KEY, &EC_SECP_256_K1],
+		#[cfg(feature = "crypto")]
+		sign_alg: SignAlgo::EcDsa(&signature::ECDSA_P256K1_SHA256_ASN1_SIGNING),
+		// ecdsa-with-SHA256 in RFC 5758
+		oid_components: &[1, 2, 840, 10045, 4, 3, 2],
+		params: SignatureAlgorithmParams::None,
+	};
+
+	/// ECDSA signing using the P-256 curves with verifiably random parameters and SHA-256 hashing as per [RFC 5758](https://tools.ietf.org/html/rfc5758#section-3.2)
 	pub static PKCS_ECDSA_P256_SHA256: SignatureAlgorithm = SignatureAlgorithm {
 		oids_sign_alg: &[EC_PUBLIC_KEY, EC_SECP_256_R1],
 		#[cfg(feature = "crypto")]