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turn back on Feitian workaround, with fix to save/restore INS #23

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turn back on Feitian workaround, with fix to save/restore INS #23

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26 changes: 17 additions & 9 deletions src/com/mysmartlogon/gidsApplet/GidsApplet.java
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,8 @@ public class GidsApplet extends Applet {
public static final short LENGTH_RSA_3072 = (short) 3072;
public static final short LENGTH_RSA_4096 = (short) 4096;

public static final boolean CONFIG_USE_FEITIAN_WORKAROUND = true;

private GidsPINManager pinManager = null;


Expand Down Expand Up @@ -439,15 +441,21 @@ public void processGenerateAsymmetricKeypair(APDU apdu) throws ISOException {
}
kp.genKeyPair();

// special Feitian workaround for A40CR and A22CR cards
// but it breaks J3H145 :(
//
// RSAPrivateCrtKey priKey = (RSAPrivateCrtKey) kp.getPrivate();
// short pLen = priKey.getP(buf, (short) 0);
// priKey.setP(buf, (short) 0, pLen);
// short qLen = priKey.getQ(buf, (short) 0);
// priKey.setQ(buf, (short) 0, qLen);
// end of workaround
if (CONFIG_USE_FEITIAN_WORKAROUND) {
// special Feitian workaround for A40CR and A22CR cards
// but it breaks J3H145 :(
// using p1 for temp since we aren't using it anymore
p1 = buf[ISO7816.OFFSET_INS];
// TODO do we also need to back up and restore Le?

RSAPrivateCrtKey priKey = (RSAPrivateCrtKey) kp.getPrivate();
short pLen = priKey.getP(buf, (short) 0);
priKey.setP(buf, (short) 0, pLen);
short qLen = priKey.getQ(buf, (short) 0);
priKey.setQ(buf, (short) 0, qLen);

buf[ISO7816.OFFSET_INS] = p1;
}

} catch(CryptoException e) {
if(e.getReason() == CryptoException.NO_SUCH_ALGORITHM) {
Expand Down