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Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/generators/DSAKeyPairGenerator.java')
-rw-r--r--core/src/main/java/org/bouncycastle/crypto/generators/DSAKeyPairGenerator.java69
1 files changed, 0 insertions, 69 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/generators/DSAKeyPairGenerator.java b/core/src/main/java/org/bouncycastle/crypto/generators/DSAKeyPairGenerator.java
deleted file mode 100644
index ff3df358..00000000
--- a/core/src/main/java/org/bouncycastle/crypto/generators/DSAKeyPairGenerator.java
+++ /dev/null
@@ -1,69 +0,0 @@
-package org.bouncycastle.crypto.generators;
-
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
-import org.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator;
-import org.bouncycastle.crypto.KeyGenerationParameters;
-import org.bouncycastle.crypto.params.DSAKeyGenerationParameters;
-import org.bouncycastle.crypto.params.DSAParameters;
-import org.bouncycastle.crypto.params.DSAPrivateKeyParameters;
-import org.bouncycastle.crypto.params.DSAPublicKeyParameters;
-import org.bouncycastle.math.ec.WNafUtil;
-import org.bouncycastle.util.BigIntegers;
-
-/**
- * a DSA key pair generator.
- *
- * This generates DSA keys in line with the method described
- * in <i>FIPS 186-3 B.1 FFC Key Pair Generation</i>.
- */
-public class DSAKeyPairGenerator
- implements AsymmetricCipherKeyPairGenerator
-{
- private static final BigInteger ONE = BigInteger.valueOf(1);
-
- private DSAKeyGenerationParameters param;
-
- public void init(
- KeyGenerationParameters param)
- {
- this.param = (DSAKeyGenerationParameters)param;
- }
-
- public AsymmetricCipherKeyPair generateKeyPair()
- {
- DSAParameters dsaParams = param.getParameters();
-
- BigInteger x = generatePrivateKey(dsaParams.getQ(), param.getRandom());
- BigInteger y = calculatePublicKey(dsaParams.getP(), dsaParams.getG(), x);
-
- return new AsymmetricCipherKeyPair(
- new DSAPublicKeyParameters(y, dsaParams),
- new DSAPrivateKeyParameters(x, dsaParams));
- }
-
- private static BigInteger generatePrivateKey(BigInteger q, SecureRandom random)
- {
- // B.1.2 Key Pair Generation by Testing Candidates
- int minWeight = q.bitLength() >>> 2;
- for (;;)
- {
- // TODO Prefer this method? (change test cases that used fixed random)
- // B.1.1 Key Pair Generation Using Extra Random Bits
-// BigInteger x = new BigInteger(q.bitLength() + 64, random).mod(q.subtract(ONE)).add(ONE);
-
- BigInteger x = BigIntegers.createRandomInRange(ONE, q.subtract(ONE), random);
- if (WNafUtil.getNafWeight(x) >= minWeight)
- {
- return x;
- }
- }
- }
-
- private static BigInteger calculatePublicKey(BigInteger p, BigInteger g, BigInteger x)
- {
- return g.modPow(x, p);
- }
-}