How to get private key from PKCS#12 (.p12) file using C#

Question

Im trying to sign some data using PKCS#12 certificate ,however i have problem with obtaining private key from PKCS#12 (.p12) file.

    public byte[] sign(str         


        

Answer 1

This was done for using Android - so the R.raw.key below was my file in the Android Raw folder.

I opened key.p12 as as input stream. Which I then converted to the private key using the libraries as seen in the example.

http://www.flexiprovider.de/examples/ExampleSMIMEsign.html

My code looks like this

Security.addProvider(new de.flexiprovider.core.FlexiCoreProvider());
    // Next, we have to read the private PKCS #12 file, since the the
    // private key used for signing is contained in this file:
    DERDecoder dec = new DERDecoder(getResources().openRawResource(
            R.raw.key));
    PFX pfx = new PFX();
    try {
        pfx.decode(dec);
        SafeBag safeBag = pfx.getAuthSafe().getSafeContents(0)
                .getSafeBag(0);
        PKCS8ShroudedKeyBag kBag = (PKCS8ShroudedKeyBag) safeBag
                .getBagValue();
        char[] password = "my password for the p12".toCharArray();
        privKey = kBag.getPrivateKey(password);
        new AsyncLoadStorage(this).execute();
    } catch (ASN1Exception e) {