chore: checkpoint before Python removal

vendor/elliptic-curve/tests/examples/pkcs8-private-key.pem

@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgaWJBcVYaYzQN4OfY
+afKgVJJVjhoEhotqn4VKhmeIGI2hRANCAAQcrP+1Xy8s79idies3SyaBFSRSgC3u
+oJkWBoE32DnPf8SBpESSME1+9mrBF77+g6jQjxVfK1L59hjdRHApBI4P
+-----END PRIVATE KEY-----

vendor/elliptic-curve/tests/examples/pkcs8-public-key.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEHKz/tV8vLO/YnYnrN0smgRUkUoAt
+7qCZFgaBN9g5z3/EgaREkjBNfvZqwRe+/oOo0I8VXytS+fYY3URwKQSODw==
+-----END PUBLIC KEY-----

vendor/elliptic-curve/tests/pkcs8.rs

@@ -0,0 +1,57 @@
+//! PKCS#8 tests
+
+#![cfg(all(feature = "dev", feature = "pkcs8"))]
+
+use elliptic_curve::{
+    dev::{PublicKey, SecretKey},
+    pkcs8::{DecodePrivateKey, DecodePublicKey, EncodePrivateKey},
+    sec1::ToEncodedPoint,
+};
+use hex_literal::hex;
+use pkcs8::der;
+
+/// DER-encoded PKCS#8 public key
+const PKCS8_PUBLIC_KEY_DER: &[u8; 91] = include_bytes!("examples/pkcs8-public-key.der");
+
+/// PEM-encoded PKCS#8 public key
+#[cfg(feature = "pem")]
+const PKCS8_PUBLIC_KEY_PEM: &str = include_str!("examples/pkcs8-public-key.pem");
+
+/// Example encoded scalar value
+const EXAMPLE_SCALAR: [u8; 32] =
+    hex!("AABBCCDDEEFF0000000000000000000000000000000000000000000000000001");
+
+/// Example PKCS#8 private key
+fn example_private_key() -> der::SecretDocument {
+    SecretKey::from_slice(&EXAMPLE_SCALAR)
+        .unwrap()
+        .to_pkcs8_der()
+        .unwrap()
+}
+
+#[test]
+fn decode_pkcs8_private_key_from_der() {
+    dbg!(example_private_key().as_bytes());
+    let secret_key = SecretKey::from_pkcs8_der(example_private_key().as_bytes()).unwrap();
+    assert_eq!(secret_key.to_bytes().as_slice(), &EXAMPLE_SCALAR);
+}
+
+#[test]
+fn decode_pkcs8_public_key_from_der() {
+    let public_key = PublicKey::from_public_key_der(&PKCS8_PUBLIC_KEY_DER[..]).unwrap();
+    let expected_sec1_point = hex!("041CACFFB55F2F2CEFD89D89EB374B2681152452802DEEA09916068137D839CF7FC481A44492304D7EF66AC117BEFE83A8D08F155F2B52F9F618DD447029048E0F");
+    assert_eq!(
+        public_key.to_encoded_point(false).as_bytes(),
+        &expected_sec1_point[..]
+    );
+}
+
+#[test]
+#[cfg(feature = "pem")]
+fn decode_pkcs8_public_key_from_pem() {
+    let public_key = PKCS8_PUBLIC_KEY_PEM.parse::<PublicKey>().unwrap();
+
+    // Ensure key parses equivalently to DER
+    let der_key = PublicKey::from_public_key_der(&PKCS8_PUBLIC_KEY_DER[..]).unwrap();
+    assert_eq!(public_key, der_key);
+}

vendor/elliptic-curve/tests/secret_key.rs

@@ -0,0 +1,28 @@
+//! Secret key tests
+
+#![cfg(feature = "dev")]
+
+use elliptic_curve::dev::SecretKey;
+
+#[test]
+fn from_empty_slice() {
+    assert!(SecretKey::from_slice(&[]).is_err());
+}
+
+#[test]
+fn from_slice_expected_size() {
+    let bytes = [1u8; 32];
+    assert!(SecretKey::from_slice(&bytes).is_ok());
+}
+
+#[test]
+fn from_slice_allowed_short() {
+    let bytes = [1u8; 24];
+    assert!(SecretKey::from_slice(&bytes).is_ok());
+}
+
+#[test]
+fn from_slice_too_short() {
+    let bytes = [1u8; 23]; // min 24-bytes
+    assert!(SecretKey::from_slice(&bytes).is_err());
+}