opencard.opt.security
Class RSASignCredential
java.lang.Object
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+--opencard.opt.security.RSASignCredential
- public class RSASignCredential
- extends java.lang.Object
- implements PKACredential, SignCredential
Sample credential to perform a RSA signing operation.
This credential does not hash a message nor pad input blocks which are too small.
It only accepts data which matches the key's input length and performs the
raw RSA signing algorithm.
This credential can be used for external authentication.
- See Also:
PKACredential,
SignCredential
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Method Summary |
int |
getInputLength()
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byte[] |
sign(byte[] data)
Compute a signature over a block of data. |
protected byte[] |
unsign(byte[] data,
boolean reverse)
Internal routine: Cope with stupid Java signed BigInteger arrays
^%$^&#%&@^*%#@%^% |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
RSASignCredential
public RSASignCredential(RSACRTKey privateKey)
- Constructor using an RSA private key that has parameters for
Chinese Remaineder Theorem (CRT) computation.
RSASignCredential
public RSASignCredential(RSAPrivateKey privateKey)
- Constructor using an RSA private key
sign
public byte[] sign(byte[] data)
throws OpenCardRuntimeException
- Compute a signature over a block of data.
- Specified by:
- sign in interface SignCredential
- Parameters:
data - Data to be signed. Must have length
getInputLength().- Throws:
- OpenCardRuntimeException - Invalid input block length or invalid key.
getInputLength
public int getInputLength()
- Specified by:
- getInputLength in interface SignCredential
unsign
protected byte[] unsign(byte[] data,
boolean reverse)
- Internal routine: Cope with stupid Java signed BigInteger arrays
^%$^&#%&@^*%#@%^%
- Parameters:
data - Byte array to be made 'unsigned'reverse - Set if reversal to little endian format is required- Returns:
- byte array that has a high probability of representing an
unsigned BigInteger
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