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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for the Android platform. Android unfortunately ships with a stripped-down version of Bouncy Castle, which prevents easy upgrades - Spongy Castle overcomes this and provides a full, up-to-date version of the Bouncy Castle cryptographic libs.

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package org.spongycastle.crypto;

/**
 * interface that a public/private key pair generator should conform to.
 */
public interface AsymmetricCipherKeyPairGenerator
{
    /**
     * intialise the key pair generator.
     *
     * @param param the parameters the key pair is to be initialised with.
     */
    public void init(KeyGenerationParameters param);

    /**
     * return an AsymmetricCipherKeyPair containing the generated keys.
     *
     * @return an AsymmetricCipherKeyPair containing the generated keys.
     */
    public AsymmetricCipherKeyPair generateKeyPair();
}