com.googlecode.d2j.signapk.TinySignImpl Maven / Gradle / Ivy

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package com.googlecode.d2j.signapk;

import java.io.IOException;
import java.io.OutputStream;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;

/**
 * get from
 * https://code.google.com/p/tiny-sign/source/browse/src/main/java/pxb/android
 * /tinysign/TinySign.java
 *
 * @author bob
 */
public final class TinySignImpl extends AbstractJarSign {

    private static PrivateKey buildPrivateKey() {

        PrivateKey privateKey;
        try {
            privateKey = KeyFactory.getInstance("RSA").generatePrivate(
                    new PKCS8EncodedKeySpec(Base64.decode(S_PRIVATE_KEY, 0)));
        } catch (InvalidKeySpecException | NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
        return privateKey;
    }

    public TinySignImpl() {
        super(buildPrivateKey(), "SHA1", "SHA1withRSA");
    }

    private static final String S_PRIVATE_KEY =
            "MIIBVgIBADANBgkqhkiG9w0BAQEFAASCAUAwggE8AgEAAkEAoiZSqWnFDHA5sXKoDiUUO9JuL7cm/2dCck5MKumVvv"
                    + "+WfSg0jsovnywsFN0pifmdRSLmOdUkh0d0J"
                    + "+tOnSgtsQIDAQABAkEAihag5u3Qhds9BsViIUmqhZebhr8vUuqZR8cuTo1GnbSoOHIPbAgD3J8TDbC"
                    + "/CVqae8NrgwLp325Pem1Tuof/0QIhAN1hqft1K307bsljgw3iYKopGVZBHRXsjRnNL4edV9QrAiEAu4F"
                    + "+XtS1wohGLz5QtfuMFsQNo4l31mCjt6WpBDmSi5MCIQCB++YijxmJ3mueM5"
                    + "+vd0vqnVcTHghF5y6yB5fwuKHpIQIgInnS1Hjj2prX3MPmby+LOHxfzZvvDtnCAHhTNVWonkUCIQCvV8l+SpL6Vh1nQ"
                    + "/2EKFJo2dbZB3wKG/BEYsFkPFbn9w==";

    private static final String S_SIG_PREFIX =
            "MIIB5gYJKoZIhvcNAQcCoIIB1zCCAdMCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCCATYwggEyMIHdoAMCAQICBCun"
                    + "MokwDQYJKoZIhvcNAQELBQAwDzENMAsGA1UEAxMEVGVzdDAeFw0xMjA0MjIwODQ1NDdaFw0xMzA0MjIwODQ1NDdaMA8xDTAL"
                    + "BgNVBAMTBFRlc3QwXDANBgkqhkiG9w0BAQEFAANLADBIAkEAoiZSqWnFDHA5sXKoDiUUO9JuL7cm/2dCck5MKumVvv+WfSg0"
                    + "jsovnywsFN0pifmdRSLmOdUkh0d0J+tOnSgtsQIDAQABoyEwHzAdBgNVHQ4EFgQUVL2yOinUwpARE1tOPxc1bf4WrTgwDQY"
                    + "JKoZIhvcNAQELBQADQQAnj/eZwhqwb2tgSYNvgRo5bBNNCpJbQ4alEeP/MLSIWf2nZpAix8T3oS9X2affQtAgctPATcKQa"
                    + "iH2B4L7FKlVMXoweAIBATAXMA8xDTALBgNVBAMTBFRlc3QCBCunMokwCQYFKw4DAhoFADANBgkqhkiG9w0BAQEFAARA";


    @Override
    protected void writeSignatureBlock(byte[] signature, OutputStream out) throws IOException {
        out.write(Base64.decode(S_SIG_PREFIX, 0));
        out.write(signature);
    }

}