org.spongycastle.openssl.bc.BcPEMDecryptorProvider Maven / Gradle / Ivy

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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.openssl.bc;

import org.spongycastle.openssl.PEMDecryptor;
import org.spongycastle.openssl.PEMDecryptorProvider;
import org.spongycastle.openssl.PEMException;
import org.spongycastle.openssl.PasswordException;

public class BcPEMDecryptorProvider
    implements PEMDecryptorProvider
{
    private final char[] password;

    public BcPEMDecryptorProvider(char[] password)
    {
        this.password = password;
    }

    public PEMDecryptor get(final String dekAlgName)
    {
        return new PEMDecryptor()
        {
            public byte[] decrypt(byte[] keyBytes, byte[] iv)
                throws PEMException
            {
                if (password == null)
                {
                    throw new PasswordException("Password is null, but a password is required");
                }

                return PEMUtilities.crypt(false, keyBytes, password, dekAlgName, iv);
            }
        };
    }
}