Add support for Ed25519 EC keys

See gh-35364

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/PrivateKeyParser.java

@@ -27,8 +27,8 @@ import java.security.PrivateKey;
 import java.security.spec.InvalidKeySpecException;
 import java.security.spec.PKCS8EncodedKeySpec;
 import java.util.ArrayList;
-import java.util.Base64;
 import java.util.Arrays;
+import java.util.Base64;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
@@ -70,8 +70,8 @@ final class PrivateKeyParser {
 				PrivateKeyParser::createKeySpecForPkcs1));
 		parsers.add(
 				new PemParser(EC_HEADER, EC_FOOTER, Collections.singleton("EC"), PrivateKeyParser::createKeySpecForEc));
-		parsers.add(
-				new PemParser(PKCS8_HEADER, PKCS8_FOOTER, Arrays.asList("RSA", "EC", "DSA"), PKCS8EncodedKeySpec::new));
+		parsers.add(new PemParser(PKCS8_HEADER, PKCS8_FOOTER, Arrays.asList("RSA", "EC", "DSA", "Ed25519"),
+				PKCS8EncodedKeySpec::new));
 		PEM_PARSERS = Collections.unmodifiableList(parsers);
 	}
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/server/PrivateKeyParserTests.java

@@ -59,6 +59,14 @@ class PrivateKeyParserTests {
 		assertThat(privateKey.getAlgorithm()).isEqualTo("DSA");
 	}
 
+	@Test
+	void parsePkcs8Ed25519KeyFile() {
+		PrivateKey privateKey = PrivateKeyParser.parse("classpath:ssl/pkcs8/key-ec-ed25519.pem");
+		assertThat(privateKey).isNotNull();
+		assertThat(privateKey.getFormat()).isEqualTo("PKCS#8");
+		assertThat(privateKey.getAlgorithm()).isEqualTo("EdDSA");
+	}
+
 	@Test
 	void parsePkcs8KeyFileWithEcdsa() {
 		PrivateKey privateKey = PrivateKeyParser.parse("classpath:test-ec-key.pem");

spring-boot-project/spring-boot/src/test/resources/ssl/pkcs8/key-ec-ed25519.pem

@@ -0,0 +1,3 @@
+-----BEGIN PRIVATE KEY-----
+MC4CAQAwBQYDK2VwBCIEIJOKNTaIJQTVuEqZ+yvclnjnlWJG6F+K+VsNCOlWRda+
+-----END PRIVATE KEY-----