Use only public APIs to read PKCS#1 keys (helidon-io#5240)

Co-authored-by: Weijun Wang <weijun.wang@oracle.com>

common/key-util/pom.xml

@@ -56,6 +56,11 @@
             <artifactId>junit-jupiter-api</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-params</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-core</artifactId>
@@ -68,47 +73,4 @@
         </dependency>
     </dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <!-- needed to enable use of com.sun packages that we need to parse PKCS#1 keys -->
-                    <release combine.self="override"/>
-                    <compilerArgs>
-                        <compilerArg>--add-exports=java.base/sun.security.util=io.helidon.common.pki</compilerArg>
-                    </compilerArgs>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
-    <profiles>
-        <profile>
-            <id>javadoc</id>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-javadoc-plugin</artifactId>
-                        <configuration>
-                            <release combine.self="override"/>
-                            <additionalJOptions combine.children="append">
-                                <additionalJOption>--add-exports=java.base/sun.security.util=io.helidon.common.pki
-                                </additionalJOption>
-                            </additionalJOptions>
-                        </configuration>
-                        <executions>
-                            <execution>
-                                <goals>
-                                    <goal>jar</goal>
-                                </goals>
-                            </execution>
-                        </executions>
-                    </plugin>
-                </plugins>
-            </build>
-        </profile>
-    </profiles>
 </project>

common/key-util/src/main/java/io/helidon/common/pki/PemReader.java

@@ -96,7 +96,7 @@ static PrivateKey readPrivateKey(InputStream input, char[] password) {
 
         switch (pkInfo.type) {
         case "PKCS1-RSA":
-            return rsaPrivateKey(pkcs1RsaKeySpec(pkInfo.bytes));
+            return rsaPrivateKey(Pkcs1Util.pkcs1RsaKeySpec(pkInfo.bytes));
         case "PKCS1-DSA":
             throw new UnsupportedOperationException("PKCS#1 DSA private key is not supported");
         case "PKCS1-EC":
@@ -107,11 +107,6 @@ static PrivateKey readPrivateKey(InputStream input, char[] password) {
         }
     }
 
-    private static KeySpec pkcs1RsaKeySpec(byte[] bytes) {
-        DerUtils.checkEnabled();
-        return DerUtils.pkcs1RsaKeySpec(bytes);
-    }
-
     private static PrivateKey pkcs8(KeySpec keySpec) {
         try {
             return rsaPrivateKey(keySpec);
@@ -223,7 +218,7 @@ private static X509EncodedKeySpec generatePublicKeySpec(byte[] bytes) {
         return new X509EncodedKeySpec(bytes);
     }
 
-    private static PrivateKeyInfo readPrivateKeyBytes(InputStream in) {
+    static PrivateKeyInfo readPrivateKeyBytes(InputStream in) {
         String content;
         try {
             content = readContent(in);

common/key-util/src/main/java/io/helidon/common/pki/Pkcs1Util.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2021, 2022 Oracle and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.helidon.common.pki;
+
+import java.security.spec.KeySpec;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.util.HexFormat;
+
+final class Pkcs1Util {
+    // this is a constant for RSA (and we only support RSA)
+    private static final byte[] RSA_ALG = HexFormat.of().parseHex("020100300D06092A864886F70D0101010500");
+
+    private Pkcs1Util() {
+    }
+
+    static KeySpec pkcs1RsaKeySpec(byte[] bytes) {
+        return new PKCS8EncodedKeySpec(pkcs1ToPkcs8(bytes));
+    }
+
+    // Code provided by Weijun Wang
+    private static byte[] pkcs1ToPkcs8(byte[] pkcs1Bytes) {
+
+        // PKCS #8 key will look like
+        // 30 len1
+        // 02 01 00 30 0D 06 09 2A 86 48 86 F7 0D 01 01 01 05 00
+        // 04 len2
+        // p1
+
+        byte[] len2 = encodeLen(pkcs1Bytes.length);
+        int p8len = pkcs1Bytes.length + len2.length + 1 + RSA_ALG.length;
+        byte[] len1 = encodeLen(p8len);
+        byte[] pkcs8bytes = new byte[1 + len1.length + p8len];
+
+        pkcs8bytes[0] = 0x30;
+        System.arraycopy(len1, 0, pkcs8bytes, 1, len1.length);
+        System.arraycopy(RSA_ALG, 0, pkcs8bytes, 1 + len1.length, RSA_ALG.length);
+        pkcs8bytes[1 + len1.length + RSA_ALG.length] = 0x04;
+        System.arraycopy(len2, 0, pkcs8bytes, 1 + len1.length + RSA_ALG.length + 1, len2.length);
+        System.arraycopy(pkcs1Bytes, 0, pkcs8bytes, 1 + len1.length + RSA_ALG.length + 1 + len2.length, pkcs1Bytes.length);
+
+        return pkcs8bytes;
+    }
+
+    private static byte[] encodeLen(int len) {
+        if (len < 128) {
+            return new byte[] {(byte) len};
+        } else if (len < (1 << 8)) {
+            return new byte[] {(byte) 0x081, (byte) len};
+        } else if (len < (1 << 16)) {
+            return new byte[] {(byte) 0x082, (byte) (len >> 8), (byte) len};
+        } else {
+            throw new PkiException("PKCS#1 key of unexpected size: " + len);
+        }
+    }
+}

common/key-util/src/test/java/io/helidon/common/pki/KeyConfigTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2020 Oracle and/or its affiliates.
+ * Copyright (c) 2017, 2022 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package io.helidon.common.pki;
 
+import java.security.PrivateKey;
 import java.security.cert.X509Certificate;
 import java.security.interfaces.RSAPrivateKey;
 import java.security.interfaces.RSAPublicKey;
@@ -27,10 +28,13 @@
 
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.CoreMatchers.notNullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
@@ -55,6 +59,15 @@ void testConfigPublicKey() {
         assertThat(publicKey.publicKey().isPresent(), is(true));
     }
 
+    @ParameterizedTest
+    @CsvSource({"512", "1024","2048"})
+    void testPkcs1(String length) {
+        PrivateKey privateKey = PemReader.readPrivateKey(KeyConfigTest.class.getResourceAsStream("/keystore/pkcs1-" + length +
+                                                                                                         ".pem"), null);
+        assertThat(privateKey, notNullValue());
+        assertThat(privateKey.getAlgorithm(), is("RSA"));
+    }
+
     @Test
     void testOldPublicKey() {
         KeyConfig publicKey = KeyConfig.create(config.get("unit-2"));

common/key-util/src/test/resources/keystore/pkcs1-1024.pem

@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

common/key-util/src/test/resources/keystore/pkcs1-2048.pem

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+ndElMDkCgYEA1q1kYXu0h5g0G/Cal+Kz3YKNDHsFQ9sRmfqQ6Isk6QEeEVR4hrZi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+-----END RSA PRIVATE KEY-----

common/key-util/src/test/resources/keystore/pkcs1-512.pem

@@ -0,0 +1,9 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIBPAIBAAJBAMqJuM6TvqUEb0UlQDSQF2aXgD4JH7hojJ01m/1f3q91lnOpMzab
++kBre1u3vtoGnl2+FqDKr/tthys8vkenyTMCAwEAAQJBAK78mkzwXTBZSoFlE7nW
+HEGo90WhwGQlAAf7f1BD+jOAS4XM5bBui4m77Qr0e3GaRd7EeYnW5yAZoKy+nrmb
+dwECIQD4nxUsEf4B6DWwdzctWKdx0iCxrIomR9Oe1aHI+5tKQQIhANCMhGxJGiiq
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+ib47EGdnJLklwsECIDXHRo61+yzpaqi35hIIIIALVOrHqhwrOkLQudH8KB3JAiEA
+w4vdFCrQlE3C+RfkK/TVn+r7kZ/hIqb99rTsbI6cnZ8=
+-----END RSA PRIVATE KEY-----

pom.xml

@@ -387,7 +387,6 @@
                         </offlineLinks>
                         <additionalJOptions combine.children="append">
                             <additionalJOption>-J-Dhttp.agent=maven-javadoc-plugin</additionalJOption>
-                            <additionalJOption>--add-exports=java.base/sun.security.util=io.helidon.common.pki</additionalJOption>
                         </additionalJOptions>
                         <additionalOptions>
                             <!--<additionalOption> - -add-stylesheet ${top.parent.basedir}/etc/helidon-javadoc.css</additionalOption>-->