author | jwilhelm |
Thu, 30 Oct 2014 01:01:37 +0100 | |
changeset 27445 | a8354c76ae20 |
parent 25859 | 3317bb8137f4 |
child 28974 | 71fe221460f5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
|
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* questions. |
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*/ |
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package sun.security.ec; |
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|
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import java.nio.ByteBuffer; |
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import java.math.BigInteger; |
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import java.security.*; |
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import java.security.interfaces.*; |
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import java.security.spec.*; |
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import sun.security.jca.JCAUtil; |
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import sun.security.util.*; |
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/** |
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* ECDSA signature implementation. This class currently supports the |
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* following algorithm names: |
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* |
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* . "NONEwithECDSA" |
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* . "SHA1withECDSA" |
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* . "SHA224withECDSA" |
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* . "SHA256withECDSA" |
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* . "SHA384withECDSA" |
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* . "SHA512withECDSA" |
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* |
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* @since 1.7 |
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*/ |
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abstract class ECDSASignature extends SignatureSpi { |
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// message digest implementation we use |
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private final MessageDigest messageDigest; |
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// supplied entropy |
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private SecureRandom random; |
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// flag indicating whether the digest has been reset |
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private boolean needsReset; |
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// private key, if initialized for signing |
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private ECPrivateKey privateKey; |
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// public key, if initialized for verifying |
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private ECPublicKey publicKey; |
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/** |
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* Constructs a new ECDSASignature. Used by Raw subclass. |
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* |
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* @exception ProviderException if the native ECC library is unavailable. |
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*/ |
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ECDSASignature() { |
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messageDigest = null; |
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} |
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/** |
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* Constructs a new ECDSASignature. Used by subclasses. |
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*/ |
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ECDSASignature(String digestName) { |
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try { |
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messageDigest = MessageDigest.getInstance(digestName); |
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} catch (NoSuchAlgorithmException e) { |
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throw new ProviderException(e); |
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} |
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needsReset = false; |
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} |
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// Nested class for NONEwithECDSA signatures |
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public static final class Raw extends ECDSASignature { |
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// the longest supported digest is 512 bits (SHA-512) |
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private static final int RAW_ECDSA_MAX = 64; |
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private final byte[] precomputedDigest; |
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private int offset = 0; |
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public Raw() { |
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precomputedDigest = new byte[RAW_ECDSA_MAX]; |
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} |
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// Stores the precomputed message digest value. |
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@Override |
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protected void engineUpdate(byte b) throws SignatureException { |
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if (offset >= precomputedDigest.length) { |
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offset = RAW_ECDSA_MAX + 1; |
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return; |
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} |
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precomputedDigest[offset++] = b; |
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} |
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// Stores the precomputed message digest value. |
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@Override |
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protected void engineUpdate(byte[] b, int off, int len) |
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throws SignatureException { |
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if (offset >= precomputedDigest.length) { |
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offset = RAW_ECDSA_MAX + 1; |
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return; |
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} |
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System.arraycopy(b, off, precomputedDigest, offset, len); |
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offset += len; |
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} |
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// Stores the precomputed message digest value. |
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@Override |
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protected void engineUpdate(ByteBuffer byteBuffer) { |
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int len = byteBuffer.remaining(); |
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if (len <= 0) { |
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return; |
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} |
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if (offset + len >= precomputedDigest.length) { |
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offset = RAW_ECDSA_MAX + 1; |
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return; |
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} |
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byteBuffer.get(precomputedDigest, offset, len); |
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offset += len; |
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} |
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@Override |
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protected void resetDigest(){ |
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offset = 0; |
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} |
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|
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// Returns the precomputed message digest value. |
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@Override |
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146 |
protected byte[] getDigestValue() throws SignatureException { |
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if (offset > RAW_ECDSA_MAX) { |
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throw new SignatureException("Message digest is too long"); |
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|
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} |
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byte[] result = new byte[offset]; |
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System.arraycopy(precomputedDigest, 0, result, 0, offset); |
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offset = 0; |
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|
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return result; |
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} |
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} |
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158 |
|
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// Nested class for SHA1withECDSA signatures |
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public static final class SHA1 extends ECDSASignature { |
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public SHA1() { |
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super("SHA1"); |
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} |
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} |
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|
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// Nested class for SHA224withECDSA signatures |
167 |
public static final class SHA224 extends ECDSASignature { |
|
168 |
public SHA224() { |
|
169 |
super("SHA-224"); |
|
170 |
} |
|
171 |
} |
|
172 |
||
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// Nested class for SHA256withECDSA signatures |
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public static final class SHA256 extends ECDSASignature { |
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public SHA256() { |
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super("SHA-256"); |
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} |
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} |
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179 |
|
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// Nested class for SHA384withECDSA signatures |
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public static final class SHA384 extends ECDSASignature { |
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public SHA384() { |
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super("SHA-384"); |
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184 |
} |
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185 |
} |
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186 |
|
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187 |
// Nested class for SHA512withECDSA signatures |
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public static final class SHA512 extends ECDSASignature { |
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public SHA512() { |
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super("SHA-512"); |
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191 |
} |
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192 |
} |
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193 |
|
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194 |
// initialize for verification. See JCA doc |
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195 |
@Override |
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196 |
protected void engineInitVerify(PublicKey publicKey) |
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throws InvalidKeyException { |
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this.publicKey = (ECPublicKey) ECKeyFactory.toECKey(publicKey); |
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199 |
|
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// Should check that the supplied key is appropriate for signature |
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201 |
// algorithm (e.g. P-256 for SHA256withECDSA) |
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this.privateKey = null; |
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203 |
resetDigest(); |
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204 |
} |
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205 |
|
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206 |
// initialize for signing. See JCA doc |
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207 |
@Override |
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208 |
protected void engineInitSign(PrivateKey privateKey) |
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209 |
throws InvalidKeyException { |
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210 |
engineInitSign(privateKey, null); |
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211 |
} |
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212 |
|
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213 |
// initialize for signing. See JCA doc |
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214 |
@Override |
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215 |
protected void engineInitSign(PrivateKey privateKey, SecureRandom random) |
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216 |
throws InvalidKeyException { |
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217 |
this.privateKey = (ECPrivateKey) ECKeyFactory.toECKey(privateKey); |
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218 |
|
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219 |
// Should check that the supplied key is appropriate for signature |
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220 |
// algorithm (e.g. P-256 for SHA256withECDSA) |
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221 |
this.publicKey = null; |
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222 |
this.random = random; |
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223 |
resetDigest(); |
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224 |
} |
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225 |
|
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226 |
/** |
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227 |
* Resets the message digest if needed. |
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228 |
*/ |
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229 |
protected void resetDigest() { |
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230 |
if (needsReset) { |
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231 |
if (messageDigest != null) { |
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232 |
messageDigest.reset(); |
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233 |
} |
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234 |
needsReset = false; |
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235 |
} |
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236 |
} |
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237 |
|
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238 |
/** |
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239 |
* Returns the message digest value. |
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240 |
*/ |
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241 |
protected byte[] getDigestValue() throws SignatureException { |
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242 |
needsReset = false; |
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243 |
return messageDigest.digest(); |
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244 |
} |
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245 |
|
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246 |
// update the signature with the plaintext data. See JCA doc |
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247 |
@Override |
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248 |
protected void engineUpdate(byte b) throws SignatureException { |
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249 |
messageDigest.update(b); |
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250 |
needsReset = true; |
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251 |
} |
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252 |
|
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253 |
// update the signature with the plaintext data. See JCA doc |
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254 |
@Override |
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255 |
protected void engineUpdate(byte[] b, int off, int len) |
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256 |
throws SignatureException { |
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257 |
messageDigest.update(b, off, len); |
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258 |
needsReset = true; |
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259 |
} |
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260 |
|
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261 |
// update the signature with the plaintext data. See JCA doc |
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262 |
@Override |
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263 |
protected void engineUpdate(ByteBuffer byteBuffer) { |
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264 |
int len = byteBuffer.remaining(); |
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265 |
if (len <= 0) { |
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266 |
return; |
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267 |
} |
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268 |
|
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269 |
messageDigest.update(byteBuffer); |
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270 |
needsReset = true; |
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271 |
} |
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272 |
|
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273 |
// sign the data and return the signature. See JCA doc |
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274 |
@Override |
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275 |
protected byte[] engineSign() throws SignatureException { |
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276 |
byte[] s = privateKey.getS().toByteArray(); |
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277 |
ECParameterSpec params = privateKey.getParams(); |
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278 |
// DER OID |
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279 |
byte[] encodedParams = ECUtil.encodeECParameterSpec(null, params); |
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280 |
int keySize = params.getCurve().getField().getFieldSize(); |
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281 |
|
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282 |
// seed is twice the key size (in bytes) plus 1 |
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changeset
|
283 |
byte[] seed = new byte[(((keySize + 7) >> 3) + 1) * 2]; |
3492
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
284 |
if (random == null) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
285 |
random = JCAUtil.getSecureRandom(); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
286 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
287 |
random.nextBytes(seed); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
288 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
289 |
try { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
290 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
291 |
return encodeSignature( |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
292 |
signDigest(getDigestValue(), s, encodedParams, seed)); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
293 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
294 |
} catch (GeneralSecurityException e) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
295 |
throw new SignatureException("Could not sign data", e); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
296 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
297 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
298 |
|
e549cea58864
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vinnie
parents:
diff
changeset
|
299 |
// verify the data and return the result. See JCA doc |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
300 |
@Override |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
301 |
protected boolean engineVerify(byte[] signature) throws SignatureException { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
302 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
303 |
byte[] w; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
304 |
ECParameterSpec params = publicKey.getParams(); |
17491
7a33824ec8c5
7194075: Various classes of sunec.jar are duplicated in rt.jar
vinnie
parents:
12685
diff
changeset
|
305 |
// DER OID |
7a33824ec8c5
7194075: Various classes of sunec.jar are duplicated in rt.jar
vinnie
parents:
12685
diff
changeset
|
306 |
byte[] encodedParams = ECUtil.encodeECParameterSpec(null, params); |
3492
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
307 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
308 |
if (publicKey instanceof ECPublicKeyImpl) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
309 |
w = ((ECPublicKeyImpl)publicKey).getEncodedPublicValue(); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
310 |
} else { // instanceof ECPublicKey |
17491
7a33824ec8c5
7194075: Various classes of sunec.jar are duplicated in rt.jar
vinnie
parents:
12685
diff
changeset
|
311 |
w = ECUtil.encodePoint(publicKey.getW(), params.getCurve()); |
3492
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
312 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
313 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
314 |
try { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
315 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
316 |
return verifySignedDigest( |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
317 |
decodeSignature(signature), getDigestValue(), w, encodedParams); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
318 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
319 |
} catch (GeneralSecurityException e) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
320 |
throw new SignatureException("Could not verify signature", e); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
321 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
322 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
323 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
324 |
// set parameter, not supported. See JCA doc |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
325 |
@Override |
19209 | 326 |
@Deprecated |
3492
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
327 |
protected void engineSetParameter(String param, Object value) |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
328 |
throws InvalidParameterException { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
329 |
throw new UnsupportedOperationException("setParameter() not supported"); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
330 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
331 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
332 |
// get parameter, not supported. See JCA doc |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
333 |
@Override |
19209 | 334 |
@Deprecated |
3492
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
335 |
protected Object engineGetParameter(String param) |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
336 |
throws InvalidParameterException { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
337 |
throw new UnsupportedOperationException("getParameter() not supported"); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
338 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
339 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
340 |
// Convert the concatenation of R and S into their DER encoding |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
341 |
private byte[] encodeSignature(byte[] signature) throws SignatureException { |
3863
8e0f58b1c072
6884175: CR cleanup for 6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
3492
diff
changeset
|
342 |
|
3492
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
343 |
try { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
344 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
345 |
int n = signature.length >> 1; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
346 |
byte[] bytes = new byte[n]; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
347 |
System.arraycopy(signature, 0, bytes, 0, n); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
348 |
BigInteger r = new BigInteger(1, bytes); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
349 |
System.arraycopy(signature, n, bytes, 0, n); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
350 |
BigInteger s = new BigInteger(1, bytes); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
351 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
352 |
DerOutputStream out = new DerOutputStream(signature.length + 10); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
353 |
out.putInteger(r); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
354 |
out.putInteger(s); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
355 |
DerValue result = |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
356 |
new DerValue(DerValue.tag_Sequence, out.toByteArray()); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
357 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
358 |
return result.toByteArray(); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
359 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
360 |
} catch (Exception e) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
361 |
throw new SignatureException("Could not encode signature", e); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
362 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
363 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
364 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
365 |
// Convert the DER encoding of R and S into a concatenation of R and S |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
366 |
private byte[] decodeSignature(byte[] signature) throws SignatureException { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
367 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
368 |
try { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
369 |
DerInputStream in = new DerInputStream(signature); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
370 |
DerValue[] values = in.getSequence(2); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
371 |
BigInteger r = values[0].getPositiveBigInteger(); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
372 |
BigInteger s = values[1].getPositiveBigInteger(); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
373 |
// trim leading zeroes |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
374 |
byte[] rBytes = trimZeroes(r.toByteArray()); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
375 |
byte[] sBytes = trimZeroes(s.toByteArray()); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
376 |
int k = Math.max(rBytes.length, sBytes.length); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
377 |
// r and s each occupy half the array |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
378 |
byte[] result = new byte[k << 1]; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
379 |
System.arraycopy(rBytes, 0, result, k - rBytes.length, |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
380 |
rBytes.length); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
381 |
System.arraycopy(sBytes, 0, result, result.length - sBytes.length, |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
382 |
sBytes.length); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
383 |
return result; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
384 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
385 |
} catch (Exception e) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
386 |
throw new SignatureException("Could not decode signature", e); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
387 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
388 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
389 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
390 |
// trim leading (most significant) zeroes from the result |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
391 |
private static byte[] trimZeroes(byte[] b) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
392 |
int i = 0; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
393 |
while ((i < b.length - 1) && (b[i] == 0)) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
394 |
i++; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
395 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
396 |
if (i == 0) { |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
397 |
return b; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
398 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
399 |
byte[] t = new byte[b.length - i]; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
400 |
System.arraycopy(b, i, t, 0, t.length); |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
401 |
return t; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
402 |
} |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
403 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
404 |
/** |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
405 |
* Signs the digest using the private key. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
406 |
* |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
407 |
* @param digest the digest to be signed. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
408 |
* @param s the private key's S value. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
409 |
* @param encodedParams the curve's DER encoded object identifier. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
410 |
* @param seed the random seed. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
411 |
* |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
412 |
* @return byte[] the signature. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
413 |
*/ |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
414 |
private static native byte[] signDigest(byte[] digest, byte[] s, |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
415 |
byte[] encodedParams, byte[] seed) throws GeneralSecurityException; |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
416 |
|
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
417 |
/** |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
418 |
* Verifies the signed digest using the public key. |
e549cea58864
6840752: Provide out-of-the-box support for ECC algorithms
vinnie
parents:
diff
changeset
|
419 |
* |
e549cea58864
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* @param signedDigest the signature to be verified. It is encoded |
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* as a concatenation of the key's R and S values. |
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* @param digest the digest to be used. |
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* @param w the public key's W point (in uncompressed form). |
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* @param encodedParams the curve's DER encoded object identifier. |
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* |
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* @return boolean true if the signature is successfully verified. |
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*/ |
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private static native boolean verifySignedDigest(byte[] signature, |
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byte[] digest, byte[] w, byte[] encodedParams) |
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throws GeneralSecurityException; |
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} |