--- /dev/null 2017-01-18 09:30:05.425422781 -0800 +++ new/src/jdk.crypto.cryptoki/share/classes/sun/security/pkcs11/P11ECDHKeyAgreement.java 2017-01-18 23:07:11.387885763 -0800 @@ -0,0 +1,214 @@ +/* + * Copyright (c) 2006, 2007, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package sun.security.pkcs11; + +import java.security.*; +import java.security.interfaces.ECPublicKey; +import java.security.spec.AlgorithmParameterSpec; + +import javax.crypto.*; + +import static sun.security.pkcs11.TemplateManager.*; +import sun.security.pkcs11.wrapper.*; +import static sun.security.pkcs11.wrapper.PKCS11Constants.*; + +/** + * KeyAgreement implementation for ECDH. + * + * @author Andreas Sterbenz + * @since 1.6 + */ +final class P11ECDHKeyAgreement extends KeyAgreementSpi { + + // token instance + private final Token token; + + // algorithm name + private final String algorithm; + + // mechanism id + private final long mechanism; + + // private key, if initialized + private P11Key privateKey; + + // encoded public point, non-null between doPhase() and generateSecret() only + private byte[] publicValue; + + // length of the secret to be derived + private int secretLen; + + P11ECDHKeyAgreement(Token token, String algorithm, long mechanism) { + super(); + this.token = token; + this.algorithm = algorithm; + this.mechanism = mechanism; + } + + // see JCE spec + protected void engineInit(Key key, SecureRandom random) + throws InvalidKeyException { + if (key instanceof PrivateKey == false) { + throw new InvalidKeyException + ("Key must be instance of PrivateKey"); + } + privateKey = P11KeyFactory.convertKey(token, key, "EC"); + publicValue = null; + } + + // see JCE spec + protected void engineInit(Key key, AlgorithmParameterSpec params, + SecureRandom random) throws InvalidKeyException, + InvalidAlgorithmParameterException { + if (params != null) { + throw new InvalidAlgorithmParameterException + ("Parameters not supported"); + } + engineInit(key, random); + } + + // see JCE spec + protected Key engineDoPhase(Key key, boolean lastPhase) + throws InvalidKeyException, IllegalStateException { + if (privateKey == null) { + throw new IllegalStateException("Not initialized"); + } + if (publicValue != null) { + throw new IllegalStateException("Phase already executed"); + } + if (lastPhase == false) { + throw new IllegalStateException + ("Only two party agreement supported, lastPhase must be true"); + } + if (key instanceof ECPublicKey == false) { + throw new InvalidKeyException + ("Key must be a PublicKey with algorithm EC"); + } + ECPublicKey ecKey = (ECPublicKey)key; + int keyLenBits = ecKey.getParams().getCurve().getField().getFieldSize(); + secretLen = (keyLenBits + 7) >> 3; + publicValue = P11ECKeyFactory.getEncodedPublicValue(ecKey); + return null; + } + + // see JCE spec + protected byte[] engineGenerateSecret() throws IllegalStateException { + if ((privateKey == null) || (publicValue == null)) { + throw new IllegalStateException("Not initialized correctly"); + } + Session session = null; + try { + session = token.getOpSession(); + CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] { + new CK_ATTRIBUTE(CKA_CLASS, CKO_SECRET_KEY), + new CK_ATTRIBUTE(CKA_KEY_TYPE, CKK_GENERIC_SECRET), + }; + CK_ECDH1_DERIVE_PARAMS ckParams = + new CK_ECDH1_DERIVE_PARAMS(CKD_NULL, null, publicValue); + attributes = token.getAttributes + (O_GENERATE, CKO_SECRET_KEY, CKK_GENERIC_SECRET, attributes); + long keyID = token.p11.C_DeriveKey(session.id(), + new CK_MECHANISM(mechanism, ckParams), privateKey.keyID, + attributes); + attributes = new CK_ATTRIBUTE[] { + new CK_ATTRIBUTE(CKA_VALUE) + }; + token.p11.C_GetAttributeValue(session.id(), keyID, attributes); + byte[] secret = attributes[0].getByteArray(); + token.p11.C_DestroyObject(session.id(), keyID); + return secret; + } catch (PKCS11Exception e) { + throw new ProviderException("Could not derive key", e); + } finally { + publicValue = null; + token.releaseSession(session); + } + } + + // see JCE spec + protected int engineGenerateSecret(byte[] sharedSecret, int + offset) throws IllegalStateException, ShortBufferException { + if (offset + secretLen > sharedSecret.length) { + throw new ShortBufferException("Need " + secretLen + + " bytes, only " + (sharedSecret.length - offset) + " available"); + } + byte[] secret = engineGenerateSecret(); + System.arraycopy(secret, 0, sharedSecret, offset, secret.length); + return secret.length; + } + + // see JCE spec + protected SecretKey engineGenerateSecret(String algorithm) + throws IllegalStateException, NoSuchAlgorithmException, + InvalidKeyException { + if (algorithm == null) { + throw new NoSuchAlgorithmException("Algorithm must not be null"); + } + if (algorithm.equals("TlsPremasterSecret") == false) { + throw new NoSuchAlgorithmException + ("Only supported for algorithm TlsPremasterSecret"); + } + return nativeGenerateSecret(algorithm); + } + + private SecretKey nativeGenerateSecret(String algorithm) + throws IllegalStateException, NoSuchAlgorithmException, + InvalidKeyException { + if ((privateKey == null) || (publicValue == null)) { + throw new IllegalStateException("Not initialized correctly"); + } + long keyType = CKK_GENERIC_SECRET; + Session session = null; + try { + session = token.getObjSession(); + CK_ATTRIBUTE[] attributes = new CK_ATTRIBUTE[] { + new CK_ATTRIBUTE(CKA_CLASS, CKO_SECRET_KEY), + new CK_ATTRIBUTE(CKA_KEY_TYPE, keyType), + }; + CK_ECDH1_DERIVE_PARAMS ckParams = + new CK_ECDH1_DERIVE_PARAMS(CKD_NULL, null, publicValue); + attributes = token.getAttributes + (O_GENERATE, CKO_SECRET_KEY, keyType, attributes); + long keyID = token.p11.C_DeriveKey(session.id(), + new CK_MECHANISM(mechanism, ckParams), privateKey.keyID, + attributes); + CK_ATTRIBUTE[] lenAttributes = new CK_ATTRIBUTE[] { + new CK_ATTRIBUTE(CKA_VALUE_LEN), + }; + token.p11.C_GetAttributeValue(session.id(), keyID, lenAttributes); + int keyLen = (int)lenAttributes[0].getLong(); + SecretKey key = P11Key.secretKey + (session, keyID, algorithm, keyLen << 3, attributes); + return key; + } catch (PKCS11Exception e) { + throw new InvalidKeyException("Could not derive key", e); + } finally { + publicValue = null; + token.releaseSession(session); + } + } + +}