| package org.bouncycastle.jcajce.provider.asymmetric.rsa; |
| |
| import java.math.BigInteger; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.KeyPair; |
| import java.security.SecureRandom; |
| import java.security.spec.AlgorithmParameterSpec; |
| import java.security.spec.RSAKeyGenParameterSpec; |
| |
| import org.bouncycastle.crypto.AsymmetricCipherKeyPair; |
| import org.bouncycastle.crypto.generators.RSAKeyPairGenerator; |
| import org.bouncycastle.crypto.params.RSAKeyGenerationParameters; |
| import org.bouncycastle.crypto.params.RSAKeyParameters; |
| import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters; |
| import org.bouncycastle.jcajce.provider.asymmetric.util.PrimeCertaintyCalculator; |
| |
| public class KeyPairGeneratorSpi |
| extends java.security.KeyPairGenerator |
| { |
| public KeyPairGeneratorSpi( |
| String algorithmName) |
| { |
| super(algorithmName); |
| } |
| |
| final static BigInteger defaultPublicExponent = BigInteger.valueOf(0x10001); |
| |
| RSAKeyGenerationParameters param; |
| RSAKeyPairGenerator engine; |
| |
| public KeyPairGeneratorSpi() |
| { |
| super("RSA"); |
| |
| engine = new RSAKeyPairGenerator(); |
| param = new RSAKeyGenerationParameters(defaultPublicExponent, |
| new SecureRandom(), 2048, PrimeCertaintyCalculator.getDefaultCertainty(2048)); |
| engine.init(param); |
| } |
| |
| public void initialize( |
| int strength, |
| SecureRandom random) |
| { |
| param = new RSAKeyGenerationParameters(defaultPublicExponent, |
| // BEGIN android-changed |
| // Was: random, strength, PrimeCertaintyCalculator.getDefaultCertainty(strength)); |
| (random != null) ? random : new SecureRandom(), strength, PrimeCertaintyCalculator.getDefaultCertainty(strength)); |
| // END android-changed |
| |
| engine.init(param); |
| } |
| |
| public void initialize( |
| AlgorithmParameterSpec params, |
| SecureRandom random) |
| throws InvalidAlgorithmParameterException |
| { |
| if (!(params instanceof RSAKeyGenParameterSpec)) |
| { |
| throw new InvalidAlgorithmParameterException("parameter object not a RSAKeyGenParameterSpec"); |
| } |
| RSAKeyGenParameterSpec rsaParams = (RSAKeyGenParameterSpec)params; |
| |
| param = new RSAKeyGenerationParameters( |
| rsaParams.getPublicExponent(), |
| // BEGIN android-changed |
| // Was: random, rsaParams.getKeysize(), PrimeCertaintyCalculator.getDefaultCertainty(2048)); |
| (random != null) ? random : new SecureRandom(), rsaParams.getKeysize(), PrimeCertaintyCalculator.getDefaultCertainty(2048)); |
| // END android-changed |
| |
| engine.init(param); |
| } |
| |
| public KeyPair generateKeyPair() |
| { |
| AsymmetricCipherKeyPair pair = engine.generateKeyPair(); |
| RSAKeyParameters pub = (RSAKeyParameters)pair.getPublic(); |
| RSAPrivateCrtKeyParameters priv = (RSAPrivateCrtKeyParameters)pair.getPrivate(); |
| |
| return new KeyPair(new BCRSAPublicKey(pub), |
| new BCRSAPrivateCrtKey(priv)); |
| } |
| } |