Troubleshooting guide

109
5: Using smart cards
/**
* Determine if this token supports the chosen operation using the provided system.
*
* @param cryptoSystem Crypto System to check against.
* @param operation Operation to check: either KEY_GENERATION,
* PUBLIC_KEY_OPERATION, PRIVATE_KEY_OPERATION,* or some other value
* specific to the crypto system that indicates the operation to check.
*/
public boolean isSupported( CryptoSystem cryptoSystem, int operation )
{
return ( operation == PRIVATE_KEY_OPERATION );
}
/**
* Determines if the given key and crypto system
* support RSA encryption.
*
* @return True if the token supports RSA encryption.
*
* @param cryptoSystem Crypto system to check.
* @param privateKeyData Private key data.
*
* @throws CryptoTokenException If an error occurs with a crypto
* token or the crypto token is invalid.
*/
public boolean isSupportedDecryptRSA( RSACryptoSystem cryptoSystem,
CryptoTokenPrivateKeyData privateKeyData )throws CryptoTokenException
{
return privateKeyData instanceof MyCryptoTokenData;
}
/**
* Perform a raw RSA decryption.
*
* @param cryptoSystem Crypto system associated with the token.
* @param privateKeyData RSA private key.
* @param input Input data.
* @param inputOffset First byte of the input data to read.
* @param output Buffer for the output data.
* @param outputOffset Position in the output buffer to receive the first written byte.
*
* @throws CryptoTokenException Thrown if an error occurs with a crypto
* token or the crypto token is invalid.
*/
public void decryptRSA( RSACryptoSystem cryptoSystem,
CryptoTokenPrivateKeyData privateKeyData,byte[] input, int inputOffset,
byte[] output, int outputOffset )throws CryptoTokenException
{
try {
signDecryptHelper( cryptoSystem, privateKeyData, input, inputOffset, output,
outputOffset, DECRYPT_DESC, SmartCardSession.DECRYPT_OPERATION );
}
catch ( CryptoUnsupportedOperationException e ) {
throw new CryptoTokenException( e.toString() );
}
}