Add support for other keytypes to openssh-key-v1 keyfiles (#485)

* Added support for RSA to openssh-key-v1 keyfile

* Fixed exception

* Added ECDSA support to openssh-key-v1

* Added integration tests for different keytypes

src/itest/docker-image/Dockerfile

@@ -1,6 +1,6 @@
 FROM sickp/alpine-sshd:7.5-r2
 
-ADD id_rsa.pub /home/sshj/.ssh/authorized_keys
+ADD authorized_keys /home/sshj/.ssh/authorized_keys
 
 ADD test-container/ssh_host_ecdsa_key     /etc/ssh/ssh_host_ecdsa_key
 ADD test-container/ssh_host_ecdsa_key.pub /etc/ssh/ssh_host_ecdsa_key.pub

src/itest/docker-image/authorized_keys

@@ -0,0 +1,7 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBOEQcvowiV3igdRO7rKPrZrao1hCQrnC4tgsxqSJdQCbABI+vHrdbJRfWZNuSk48aAtARJzJVmkn/r63EPJgkh8= root@itgcpkerberosstack-cbgateway-0-20151117031915
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBHQiZm0wBbmI8gohA/N9ir1O+egikL6S9FjZS8GHbx4rTHI1V+vbXxx2O9bFWtep1PFb4iowtZkxf6gvRjGkL6M= [email protected]
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDAdJiRkkBM8yC8seTEoAn2PfwbLKrkcahZ0xxPoWICJ root@sshj
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ8ww4hJG/gHJYdkjTTBDF1GNz+228nuWprPV+NbQauA [email protected]
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOaWrwt3drIOjeBq2LSHRavxAT7ja2f+5soOUJl/zKSI [email protected]
+ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAoZ9l6Tkm2aL1tSBy2yw4xU5s8BE9MfqS/4J7DzvsYJxF6oQmTIjmStuhH/CT7UjuDtKXdXZUsIhKtafiizxGO8kHSzKDeitpth2RSr8ddMzZKyD6RNs7MfsgjA3UTtrrSrCXEY6O43S2cnuJrWzkPxtwxaQ3zOvDbS2tiulzyq0VzYmuhA/a4CyuQtJBuu+P2oqmu6pU/VB6IzONpvBvYbNPsH1WDmP7zko5wHPihXPCliztspKxS4DRtOZ7BGXyvg44UmIy0Kf4jOkaBV/eCCA4qH7ZHz71/5ceMOpszPcNOEmLGGYhwI+P3OuGMpkrSAv1f8IY6R8spZNncP6UaQ== no-passphrase
+ssh-rsa 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 [email protected]

src/itest/groovy/com/hierynomus/sshj/IntegrationBaseSpec.groovy

@@ -24,7 +24,7 @@ import spock.lang.Specification
 class IntegrationBaseSpec extends Specification {
     protected static final int DOCKER_PORT = 2222
     protected static final String USERNAME = "sshj"
-    protected static final String KEYFILE = "src/test/resources/id_rsa"
+    protected static final String KEYFILE = "src/itest/resources/keyfiles/id_rsa"
     protected final static String SERVER_IP = System.getProperty("serverIP", "127.0.0.1")
 
     protected static SSHClient getConnectedClient(Config config) {

src/itest/groovy/com/hierynomus/sshj/IntegrationSpec.groovy

@@ -57,23 +57,35 @@ class IntegrationSpec extends IntegrationBaseSpec {
         thrown(TransportException.class)
     }
 
-    def "should authenticate"() {
+    @Unroll
+    def "should authenticate with key #key"() {
         given:
         SSHClient client = getConnectedClient()
 
         when:
-        client.authPublickey(USERNAME, KEYFILE)
+        def keyProvider = passphrase != null ? client.loadKeys("src/itest/resources/keyfiles/$key", passphrase) : client.loadKeys("src/itest/resources/keyfiles/$key")
+        client.authPublickey(USERNAME, keyProvider)
 
         then:
         client.isAuthenticated()
+
+        where:
+        key | passphrase
+//        "id_ecdsa_nistp256" | null // TODO: Need to improve PKCS8 key support.
+        "id_ecdsa_opensshv1" | null
+        "id_ed25519_opensshv1" | null
+        "id_ed25519_opensshv1_aes256cbc.pem" | "foobar"
+        "id_ed25519_opensshv1_protected" | "sshjtest"
+        "id_rsa" | null
+        "id_rsa_opensshv1" | null
     }
 
    def "should not authenticate with wrong key"() {
         given:
         SSHClient client = getConnectedClient()
 
         when:
-        client.authPublickey("sshj", "src/test/resources/id_dsa")
+        client.authPublickey("sshj", "src/itest/resources/keyfiles/id_unknown_key")
 
         then:
         thrown(UserAuthException.class)

src/itest/resources/keyfiles/id_ecdsa_nistp256

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIJUMlsSlXqCZmCjlN4kV7hzP+p9pu0fwJ8r4m1qle58SoAoGCCqGSM49
+AwEHoUQDQgAE4RBy+jCJXeKB1E7uso+tmtqjWEJCucLi2CzGpIl1AJsAEj68et1s
+lF9Zk25KTjxoC0BEnMlWaSf+vrcQ8mCSHw==
+-----END EC PRIVATE KEY-----

src/itest/resources/keyfiles/id_ecdsa_opensshv1

@@ -0,0 +1,9 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAaAAAABNlY2RzYS
+1zaGEyLW5pc3RwMjU2AAAACG5pc3RwMjU2AAAAQQR0ImZtMAW5iPIKIQPzfYq9TvnoIpC+
+kvRY2UvBh28eK0xyNVfr218cdjvWxVrXqdTxW+IqMLWZMX+oL0YxpC+jAAAAsD+6Oow/uj
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+A/N9ir1O+egikL6S9FjZS8GHbx4rTHI1V+vbXxx2O9bFWtep1PFb4iowtZkxf6gvRjGkL6
+MAAAAgXNC11pInVAOd3xNphiHMoISeitf6h1IKbDM+niLrL5kAAAAXYWp2YW5lcnBASGVp
+bWRhbGwubG9jYWwB
+-----END OPENSSH PRIVATE KEY-----

src/itest/resources/keyfiles/id_ed25519_opensshv1

@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACAwHSYkZJATPMgvLHkxKAJ9j38Gyyq5HGoWdMcT6FiAiQAAAJDimgR84poE
+fAAAAAtzc2gtZWQyNTUxOQAAACAwHSYkZJATPMgvLHkxKAJ9j38Gyyq5HGoWdMcT6FiAiQ
+AAAECmsckQycWnfGQK6XtQpaMGODbAkMQOdJNK6XJSipB7dDAdJiRkkBM8yC8seTEoAn2P
+fwbLKrkcahZ0xxPoWICJAAAACXJvb3RAc3NoagECAwQ=
+-----END OPENSSH PRIVATE KEY-----

src/itest/resources/keyfiles/id_ed25519_opensshv1_aes256cbc.pem

@@ -0,0 +1,8 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAACmFlczI1Ni1jYmMAAAAGYmNyeXB0AAAAGAAAABBLQVXV9f
+Wpw8AL9RTpAr//AAAAEAAAAAEAAAAzAAAAC3NzaC1lZDI1NTE5AAAAIJ8ww4hJG/gHJYdk
+jTTBDF1GNz+228nuWprPV+NbQauAAAAAoGHEO7x3fSRBohvrIR52U4XD3uqRnhrPYm01k1
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+nzN/DR0jt7Nzep2kNCLAS24QEkvQeATVSDiL8=
+-----END OPENSSH PRIVATE KEY-----

src/itest/resources/keyfiles/id_ed25519_opensshv1_protected

@@ -0,0 +1,8 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAACmFlczI1Ni1jdHIAAAAGYmNyeXB0AAAAGAAAABB/aWL0WG
+iYPOTxGlFwvaCNAAAAEAAAAAEAAAAzAAAAC3NzaC1lZDI1NTE5AAAAIOaWrwt3drIOjeBq
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+M9p/SW5ehL5KPJhGa5a+ZQXRojwEH7J4Q5xztH1gviTdIEpFWWQBH8rX6y
+-----END OPENSSH PRIVATE KEY-----

src/itest/resources/keyfiles/id_rsa

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
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+YZoqMQLhk/PB8V4l7yJmPrE971RmJBBDlLDt6hZwOYEI2yF4
+-----END RSA PRIVATE KEY-----

src/itest/resources/keyfiles/id_rsa_opensshv1

@@ -0,0 +1,49 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAACFwAAAAdzc2gtcn
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+-----END OPENSSH PRIVATE KEY-----

src/itest/resources/keyfiles/id_unknown_key

@@ -0,0 +1,15 @@
+-----BEGIN DSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-EDE3-CBC,9B6744BB12A8EA8F
+
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+scclJuJIbawqiuV/Lv6bvgzMa/ZXL4b9JeJPuQELa7tCpvj4fpNk1IiftYISlwoT
+iG5pL8yLhPL4/fxGnKJzUPCA9mbwiloW2cAZZxTd+Utqmhemcl9gF0JGNR2XeYwS
+3obEjbkqMF0WR3AcVZU9B5d9SKUaAzTp4vu5yZtNVEIaiVlnI3hMwWMs2Jgahswo
+QF9MCPsRYsxLs7/u4a4qoQ==
+-----END DSA PRIVATE KEY-----

src/main/java/com/hierynomus/sshj/userauth/keyprovider/OpenSSHKeyV1KeyFile.java

@@ -21,23 +21,27 @@
 import net.i2p.crypto.eddsa.spec.EdDSAPrivateKeySpec;
 import net.schmizz.sshj.common.*;
 import net.schmizz.sshj.common.Buffer.PlainBuffer;
-import net.schmizz.sshj.transport.cipher.BlockCipher;
 import net.schmizz.sshj.transport.cipher.Cipher;
 import net.schmizz.sshj.userauth.keyprovider.BaseFileKeyProvider;
 import net.schmizz.sshj.userauth.keyprovider.FileKeyProvider;
 import net.schmizz.sshj.userauth.keyprovider.KeyFormat;
+import org.bouncycastle.asn1.nist.NISTNamedCurves;
+import org.bouncycastle.asn1.x9.X9ECParameters;
+import org.bouncycastle.jce.spec.ECNamedCurveSpec;
 import org.mindrot.jbcrypt.BCrypt;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.BufferedReader;
 import java.io.IOException;
+import java.math.BigInteger;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
 import java.nio.charset.Charset;
-import java.security.GeneralSecurityException;
-import java.security.KeyPair;
-import java.security.PublicKey;
+import java.security.*;
+import java.security.spec.ECPrivateKeySpec;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.RSAPrivateKeySpec;
 import java.util.Arrays;
 
 /**
@@ -125,10 +129,12 @@ private PlainBuffer decryptBuffer(PlainBuffer privateKeyBuffer, String cipherNam
     private void initializeCipher(String kdfName, byte[] kdfOptions, Cipher cipher) throws Buffer.BufferException {
         if (kdfName.equals(BCRYPT)) {
             PlainBuffer opts = new PlainBuffer(kdfOptions);
-            CharBuffer charBuffer = CharBuffer.wrap(pwdf.reqPassword(null));
-            ByteBuffer byteBuffer = Charset.forName("UTF-8").encode(charBuffer);
-            byte[] passphrase = Arrays.copyOfRange(byteBuffer.array(),
-                    byteBuffer.position(), byteBuffer.limit());
+            byte[] passphrase = new byte[0];
+            if (pwdf != null) {
+                CharBuffer charBuffer = CharBuffer.wrap(pwdf.reqPassword(null));
+                ByteBuffer byteBuffer = Charset.forName("UTF-8").encode(charBuffer);
+                passphrase = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());
+            }
             byte[] keyiv = new byte[48];
             new BCrypt().pbkdf(passphrase, opts.readBytes(), opts.readUInt32AsInt(), keyiv);
             byte[] key = Arrays.copyOfRange(keyiv, 0, 32);
@@ -183,13 +189,40 @@ private KeyPair readUnencrypted(final PlainBuffer keyBuffer, final PublicKey pub
         }
         // The private key section contains both the public key and the private key
         String keyType = keyBuffer.readString(); // string keytype
-        logger.info("Read key type: {}", keyType);
-
-        byte[] pubKey = keyBuffer.readBytes(); // string publickey (again...)
-        keyBuffer.readUInt32();
-        byte[] privKey = new byte[32];
-        keyBuffer.readRawBytes(privKey); // string privatekey
-        keyBuffer.readRawBytes(new byte[32]); // string publickey (again...)
+        KeyType kt = KeyType.fromString(keyType);
+        logger.info("Read key type: {}", keyType, kt);
+        KeyPair kp;
+        switch (kt) {
+            case ED25519:
+                byte[] pubKey = keyBuffer.readBytes(); // string publickey (again...)
+                keyBuffer.readUInt32(); // length of privatekey+publickey
+                byte[] privKey = new byte[32];
+                keyBuffer.readRawBytes(privKey); // string privatekey
+                keyBuffer.readRawBytes(new byte[32]); // string publickey (again...)
+                kp = new KeyPair(publicKey, new EdDSAPrivateKey(new EdDSAPrivateKeySpec(privKey, EdDSANamedCurveTable.getByName("Ed25519"))));
+                break;
+            case RSA:
+                BigInteger n = keyBuffer.readMPInt(); // Modulus
+                BigInteger e = keyBuffer.readMPInt(); // Public Exponent
+                BigInteger d = keyBuffer.readMPInt(); // Private Exponent
+                keyBuffer.readMPInt(); // iqmp (q^-1 mod p)
+                keyBuffer.readMPInt(); // p (Prime 1)
+                keyBuffer.readMPInt(); // q (Prime 2)
+                kp = new KeyPair(publicKey, SecurityUtils.getKeyFactory("RSA").generatePrivate(new RSAPrivateKeySpec(n, d)));
+                break;
+            case ECDSA256:
+                kp = new KeyPair(publicKey, createECDSAPrivateKey(kt, keyBuffer, "P-256"));
+                break;
+            case ECDSA384:
+                kp = new KeyPair(publicKey, createECDSAPrivateKey(kt, keyBuffer, "P-384"));
+                break;
+            case ECDSA521:
+                kp = new KeyPair(publicKey, createECDSAPrivateKey(kt, keyBuffer, "P-521"));
+                break;
+
+            default:
+                throw new IOException("Cannot decode keytype " + keyType + " in openssh-key-v1 files (yet).");
+        }
         String comment = keyBuffer.readString(); // string comment
         byte[] padding = new byte[keyBuffer.available()];
         keyBuffer.readRawBytes(padding); // char[] padding
@@ -198,6 +231,16 @@ private KeyPair readUnencrypted(final PlainBuffer keyBuffer, final PublicKey pub
                 throw new IOException("Padding of key format contained wrong byte at position: " + i);
             }
         }
-        return new KeyPair(publicKey, new EdDSAPrivateKey(new EdDSAPrivateKeySpec(privKey, EdDSANamedCurveTable.getByName("Ed25519"))));
+        return kp;
+    }
+
+    private PrivateKey createECDSAPrivateKey(KeyType kt, PlainBuffer buffer, String name) throws GeneralSecurityException, Buffer.BufferException {
+        PublicKey pk = kt.readPubKeyFromBuffer(buffer); // Public key
+        BigInteger s = new BigInteger(1, buffer.readBytes());
+        X9ECParameters ecParams = NISTNamedCurves.getByName(name);
+        ECNamedCurveSpec ecCurveSpec = new ECNamedCurveSpec(name, ecParams.getCurve(), ecParams.getG(), ecParams.getN());
+        ECPrivateKeySpec pks = new ECPrivateKeySpec(s, ecCurveSpec);
+        return SecurityUtils.getKeyFactory("ECDSA").generatePrivate(pks);
+
     }
 }

src/main/java/net/schmizz/sshj/userauth/keyprovider/KeyProviderUtil.java

@@ -89,7 +89,7 @@ private static String readHeader(Reader privateKey) throws IOException {
 
     private static KeyFormat keyFormatFromHeader(String header, boolean separatePubKey) {
         if (header.startsWith("-----BEGIN") && header.endsWith("PRIVATE KEY-----")) {
-            if (separatePubKey && header.contains(OpenSSHKeyV1KeyFile.OPENSSH_PRIVATE_KEY)) {
+            if (header.contains(OpenSSHKeyV1KeyFile.OPENSSH_PRIVATE_KEY)) {
                 return KeyFormat.OpenSSHv1;
             } else if (separatePubKey) {
                 // Can delay asking for password since have unencrypted pubkey

src/test/java/net/schmizz/sshj/keyprovider/OpenSSHKeyFileTest.java

@@ -197,6 +197,22 @@ public void shouldLoadProtectedED25519PrivateKeyAes256CBC() throws IOException {
         checkOpenSSHKeyV1("src/test/resources/keytypes/ed25519_aes256cbc.pem", "foobar");
     }
 
+    @Test
+    public void shouldLoadRSAPrivateKeyAsOpenSSHV1() throws IOException {
+        OpenSSHKeyV1KeyFile keyFile = new OpenSSHKeyV1KeyFile();
+        keyFile.init(new File("src/test/resources/keyformats/rsa_opensshv1"));
+        PrivateKey aPrivate = keyFile.getPrivate();
+        assertThat(aPrivate.getAlgorithm(), equalTo("RSA"));
+    }
+
+    @Test
+    public void shouldLoadECDSAPrivateKeyAsOpenSSHV1() throws IOException {
+        OpenSSHKeyV1KeyFile keyFile = new OpenSSHKeyV1KeyFile();
+        keyFile.init(new File("src/test/resources/keyformats/ecdsa_opensshv1"));
+        PrivateKey aPrivate = keyFile.getPrivate();
+        assertThat(aPrivate.getAlgorithm(), equalTo("ECDSA"));
+    }
+
     private void checkOpenSSHKeyV1(String key, final String password) throws IOException {
         OpenSSHKeyV1KeyFile keyFile = new OpenSSHKeyV1KeyFile();
         keyFile.init(new File(key), new PasswordFinder() {