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package cz.crcs.ectester.applet;
import javacard.framework.CardRuntimeException;
import javacard.framework.ISO7816;
import javacard.security.*;
/**
* Class capable of testing ECDH/C and ECDSA.
* Note that ECDH and ECDHC output should equal, only the algorithm is different.
*
* @author Jan Jancar johny@neuromancer.sk
*/
public class ECKeyTester {
private KeyAgreement ecdhKeyAgreement = null;
private KeyAgreement ecdhcKeyAgreement = null;
private Signature ecdsaSignature = null;
private short sw = ISO7816.SW_NO_ERROR;
public short allocateECDH() {
sw = ISO7816.SW_NO_ERROR;
try {
ecdhKeyAgreement = KeyAgreement.getInstance(KeyAgreement.ALG_EC_SVDP_DH, false);
} catch (CardRuntimeException ce) {
sw = ce.getReason();
}
return sw;
}
public short allocateECDHC() {
sw = ISO7816.SW_NO_ERROR;
try {
ecdhcKeyAgreement = KeyAgreement.getInstance(KeyAgreement.ALG_EC_SVDP_DHC, false);
} catch (CardRuntimeException ce) {
sw = ce.getReason();
}
return sw;
}
public short allocateECDSA() {
sw = ISO7816.SW_NO_ERROR;
try {
ecdsaSignature = Signature.getInstance(Signature.ALG_ECDSA_SHA, false);
} catch (CardRuntimeException ce) {
sw = ce.getReason();
}
return sw;
}
private short testKA(KeyAgreement ka, KeyPair privatePair, KeyPair publicPair, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset, short corruption) {
short length = 0;
try {
sw = AppletUtil.kaCheck(ka);
sw = AppletUtil.keypairCheck(privatePair);
sw = AppletUtil.keypairCheck(publicPair);
ka.init(privatePair.getPrivate());
short pubkeyLength = ((ECPublicKey) publicPair.getPublic()).getW(pubkeyBuffer, pubkeyOffset);
pubkeyLength = EC_Consts.corruptParameter(corruption, pubkeyBuffer, pubkeyOffset, pubkeyLength);
length = ka.generateSecret(pubkeyBuffer, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset);
} catch (CardRuntimeException ce) {
sw = ce.getReason();
}
return length;
}
private short testKA_direct(KeyAgreement ka, KeyPair privatePair, byte[] pubkey, short pubkeyOffset, short pubkeyLength, byte[] outpuBuffer, short outputOffset, short corruption) {
short length = 0;
try {
sw = AppletUtil.kaCheck(ka);
sw = AppletUtil.keypairCheck(privatePair);
ka.init(privatePair.getPrivate());
pubkeyLength = EC_Consts.corruptParameter(corruption, pubkey, pubkeyOffset, pubkeyLength);
length = ka.generateSecret(pubkey, pubkeyOffset, pubkeyLength, outpuBuffer, outputOffset);
} catch (CardRuntimeException ce) {
sw = ce.getReason();
}
return length;
}
/**
* Tests ECDH secret generation with keys from given {@code privatePair} and {@code publicPair}.
* Uses {@code pubkeyBuffer} at {@code pubkeyOffset} for computations.
* Output should equal with ECDHC output.
*
* @param privatePair KeyPair from which the private key is used
* @param publicPair KeyPair from which the public key is used
* @param pubkeyBuffer buffer to be used for the public key
* @param pubkeyOffset offset into pubkeyBuffer that can be used for the public key
* @param outputBuffer buffer to be used for the secret output
* @param outputOffset offset into the outputBuffer
* @param corruption (EC_Consts.CORRUPTION_* | ...)
* @return derived secret length
**/
public short testECDH(KeyPair privatePair, KeyPair publicPair, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset, short corruption) {
return testKA(ecdhKeyAgreement, privatePair, publicPair, pubkeyBuffer, pubkeyOffset, outputBuffer, outputOffset, corruption);
}
public short testECDH_direct(KeyPair privatePair, byte[] pubkey, short pubkeyOffset, short pubkeyLength, byte[] outpuBuffer, short outputOffset, short corruption) {
return testKA_direct(ecdhKeyAgreement, privatePair, pubkey, pubkeyOffset, pubkeyLength, outpuBuffer, outputOffset, corruption);
}
/**
* Tests ECDHC secret generation with keys from given {@code privatePair} and {@code publicPair}.
* Uses {@code pubkeyBuffer} at {@code pubkeyOffset} for computations.
* Output should equal to ECDH output.
*
* @param privatePair KeyPair from which the private key is used
* @param publicPair KeyPair from which the public key is used
* @param pubkeyBuffer buffer to be used for the public key
* @param pubkeyOffset offset into pubkeyBuffer that can be used for the public key
* @param outputBuffer buffer to be used for the secret output
* @param outputOffset offset into the outputBuffer
* @param corruption (EC_Consts.CORRUPTION_* | ...)
* @return derived secret length
*/
public short testECDHC(KeyPair privatePair, KeyPair publicPair, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset, short corruption) {
return testKA(ecdhcKeyAgreement, privatePair, publicPair, pubkeyBuffer, pubkeyOffset, outputBuffer, outputOffset, corruption);
}
public short testECDHC_direct(KeyPair privatePair, byte[] pubkey, short pubkeyOffset, short pubkeyLength, byte[] outpuBuffer, short outputOffset, short corruption) {
return testKA_direct(ecdhcKeyAgreement, privatePair, pubkey, pubkeyOffset, pubkeyLength, outpuBuffer, outputOffset, corruption);
}
/**
* @param privatePair KeyPair from which the private key is used
* @param publicPair KeyPair from which the public key is used
* @param pubkeyBuffer buffer to be used for the public key
* @param pubkeyOffset offset into pubkeyBuffer that can be used for the public key
* @param outputBuffer buffer to be used for the secret output
* @param outputOffset offset into the outputBuffer
* @param corruption (EC_Consts.CORRUPTION_* | ...)
* @return
*/
public short testBOTH(KeyPair privatePair, KeyPair publicPair, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset, short corruption) {
short ecdhLength = testECDH(privatePair, publicPair, pubkeyBuffer, pubkeyOffset, outputBuffer, outputOffset, corruption);
if (sw != ISO7816.SW_NO_ERROR) {
return ecdhLength;
}
short ecdhcLength = testECDHC(privatePair, publicPair, pubkeyBuffer, pubkeyOffset, outputBuffer, (short) (outputOffset + ecdhLength), corruption);
short length = (short) (ecdhLength + ecdhcLength);
if (sw != ISO7816.SW_NO_ERROR) {
return length;
}
if (javacard.framework.Util.arrayCompare(outputBuffer, outputOffset, outputBuffer, (short) (outputOffset + ecdhLength), ecdhLength) != 0) {
sw = ECTesterApplet.SW_DH_DHC_MISMATCH;
}
return length;
}
public short testBOTH_direct(KeyPair privatePair, byte[] pubkey, short pubkeyOffset, short pubkeyLength, byte[] outputBuffer, short outputOffset, short corruption) {
short ecdhLength = testECDH_direct(privatePair, pubkey, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset, corruption);
if (sw != ISO7816.SW_NO_ERROR) {
return ecdhLength;
}
short ecdhcLength = testECDHC_direct(privatePair, pubkey, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset, corruption);
short length = (short) (ecdhLength + ecdhcLength);
if (sw != ISO7816.SW_NO_ERROR) {
return length;
}
if (javacard.framework.Util.arrayCompare(outputBuffer, outputOffset, outputBuffer, (short) (outputOffset + ecdhLength), ecdhLength) != 0) {
sw = ECTesterApplet.SW_DH_DHC_MISMATCH;
}
return length;
}
/**
* @param privatePair KeyPair from which the private key is used
* @param publicPair KeyPair from which the public key is used
* @param pubkeyBuffer buffer to be used for the public key
* @param pubkeyOffset offset into pubkeyBuffer that can be used for the public key
* @param outputBuffer buffer to be used for the secret output
* @param outputOffset offset into the outputBuffer
* @param corruption (EC_Consts.CORRUPTION_* | ...)
* @return
*/
public short testANY(KeyPair privatePair, KeyPair publicPair, byte[] pubkeyBuffer, short pubkeyOffset, byte[] outputBuffer, short outputOffset, short corruption) {
short ecdhLength = testECDH(privatePair, publicPair, pubkeyBuffer, pubkeyOffset, outputBuffer, outputOffset, corruption);
if (sw == ISO7816.SW_NO_ERROR)
return ecdhLength;
return testECDHC(privatePair, publicPair, pubkeyBuffer, pubkeyOffset, outputBuffer, outputOffset, corruption);
}
public short testANY_direct(KeyPair privatePair, byte[] pubkey, short pubkeyOffset, short pubkeyLength, byte[] outputBuffer, short outputOffset, short corruption) {
short ecdhLength = testECDH_direct(privatePair, pubkey, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset, corruption);
if (sw == ISO7816.SW_NO_ERROR)
return ecdhLength;
return testECDHC_direct(privatePair, pubkey, pubkeyOffset, pubkeyLength, outputBuffer, outputOffset, corruption);
}
/**
* Uses {@code signKey} to sign data from {@code inputBuffer} at {@code inputOffset} with {@code inputOffset}.
* Then checks for correct signature length.
* Then tries verifying the data with {@code verifyKey}.
*
* @param signKey key to use for signing
* @param verifyKey key to use for verifying the signature
* @param inputBuffer buffer to sign data from
* @param inputOffset offset into inputBuffer to sign data from
* @param inputLength length of data to sign
* @param sigBuffer buffer to output signature to
* @param sigOffset offset into sigBuffer to output to
* @return signature length
*/
public short testECDSA(ECPrivateKey signKey, ECPublicKey verifyKey, byte[] inputBuffer, short inputOffset, short inputLength, byte[] sigBuffer, short sigOffset) {
short length = 0;
try {
sw = AppletUtil.signCheck(ecdsaSignature);
ecdsaSignature.init(signKey, Signature.MODE_SIGN);
length = ecdsaSignature.sign(inputBuffer, inputOffset, inputLength, sigBuffer, sigOffset);
ecdsaSignature.init(verifyKey, Signature.MODE_VERIFY);
boolean correct = ecdsaSignature.verify(inputBuffer, inputOffset, inputLength, sigBuffer, sigOffset, length);
if (!correct) {
sw = ECTesterApplet.SW_SIG_VERIFY_FAIL;
}
} catch (CardRuntimeException ce) {
sw = ce.getReason();
}
return length;
}
public KeyAgreement getECDH() {
return ecdhKeyAgreement;
}
public KeyAgreement getECDHC() {
return ecdhcKeyAgreement;
}
public Signature getECDSA() {
return ecdsaSignature;
}
public boolean hasECDH() {
return ecdhKeyAgreement != null;
}
public boolean hasECDHC() {
return ecdhcKeyAgreement != null;
}
public boolean hasECDSA() {
return ecdsaSignature != null;
}
public short getSW() {
return sw;
}
}
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