opencard.opt.security
Class RSACRTKey
java.lang.Object
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+--opencard.opt.security.RSACRTKey
- public class RSACRTKey
- extends java.lang.Object
- implements java.security.PrivateKey
Contains an RSA key in a form suitable for
fast signing via the chinese remainder's algorithm .
In this package OpenCard provides key classes for common algorithms
like RSA, DSA (or DES) that each concrete card service implementing
a card service interface should support instead of defining its own
key classes.
Only for new PKA algorithms that OpenCard does not yet support a
card service may define its own key classes.
- Version:
- $Id: RSACRTKey.java,v 1.1.1.1 1999/10/05 15:08:48 damke Exp $
- See Also:
PrivateKey, Serialized Form
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Field Summary |
protected java.math.BigInteger |
dp
d mod (p-1) |
protected java.math.BigInteger |
dq
d mod (q-1) |
protected int |
inputLength
input data length |
protected int |
keyLength
Key length (in bits) |
protected int |
outputLength
output data length |
protected java.math.BigInteger |
p
Prime p |
protected java.math.BigInteger |
q
Prime q |
protected java.math.BigInteger |
qm
(inverse of q) mod p |
|
Constructor Summary |
RSACRTKey(java.math.BigInteger p,
java.math.BigInteger q,
java.math.BigInteger qm,
java.math.BigInteger dp,
java.math.BigInteger dq)
Produce an RSACRTKey from the given BigIntegers. |
RSACRTKey(byte[] p,
byte[] q,
byte[] qm,
byte[] dp,
byte[] dq,
int inputLength,
int outputLength,
int keyLength)
Produce an RSACRTKey from the given byte arrays. |
|
Method Summary |
java.math.BigInteger |
coefficient()
Coefficient of CRT representation. |
java.math.BigInteger |
exponent1()
First Exponent of CRT representation. |
java.math.BigInteger |
exponent2()
Second Exponent of CRT representation. |
java.lang.String |
getAlgorithm()
Conformance to the java.security interface |
byte[] |
getEncoded()
Conformance to the java.security interface |
java.lang.String |
getFormat()
Conformance to the java.security interface |
int |
getInputLength()
Returns the number of bytes to be input into a signing operation
with this key. |
int |
maxOutputLength()
Returns the number of bytes to be generated by a signing operation
with this key. |
java.math.BigInteger |
prime1()
First Prime of CRT representation. |
java.math.BigInteger |
prime2()
Second Prime of CRT representation. |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
p
protected java.math.BigInteger p
- Prime p
q
protected java.math.BigInteger q
- Prime q
qm
protected java.math.BigInteger qm
- (inverse of q) mod p
dp
protected java.math.BigInteger dp
- d mod (p-1)
dq
protected java.math.BigInteger dq
- d mod (q-1)
inputLength
protected int inputLength
- input data length
outputLength
protected int outputLength
- output data length
keyLength
protected int keyLength
- Key length (in bits)
RSACRTKey
public RSACRTKey(byte[] p,
byte[] q,
byte[] qm,
byte[] dp,
byte[] dq,
int inputLength,
int outputLength,
int keyLength)
- Produce an RSACRTKey from the given byte arrays.
- Parameters:
p - Prime p.q - Prime q.qm - (inverse of q) mod pdp - d mod (p-1)dq - d mod (q-1)inputLength - Number of bytes accepted for input to signature routine.outputLength - Number of bytes produced by signature routine.keyLength - The nominal size of the key in bits.
RSACRTKey
public RSACRTKey(java.math.BigInteger p,
java.math.BigInteger q,
java.math.BigInteger qm,
java.math.BigInteger dp,
java.math.BigInteger dq)
- Produce an RSACRTKey from the given BigIntegers.
- Parameters:
p - Prime p.q - Prime q.qm - (inverse of q) mod pdp - d mod (p-1)dq - d mod (q-1)
coefficient
public java.math.BigInteger coefficient()
- Coefficient of CRT representation.
- Returns:
- Coefficient of CRT representation ((inverse of q) mod p)
exponent1
public java.math.BigInteger exponent1()
- First Exponent of CRT representation.
- Returns:
- First Exponent of CRT representation
exponent2
public java.math.BigInteger exponent2()
- Second Exponent of CRT representation.
- Returns:
- Second exponent of CRT representation
getAlgorithm
public java.lang.String getAlgorithm()
- Conformance to the java.security interface
- See Also:
PrivateKey
getEncoded
public byte[] getEncoded()
- Conformance to the java.security interface
- See Also:
PrivateKey
getFormat
public java.lang.String getFormat()
- Conformance to the java.security interface
- See Also:
PrivateKey
getInputLength
public int getInputLength()
- Returns the number of bytes to be input into a signing operation
with this key.
- Returns:
- Input data length.
maxOutputLength
public int maxOutputLength()
- Returns the number of bytes to be generated by a signing operation
with this key.
- Returns:
- Output data length.
prime1
public java.math.BigInteger prime1()
- First Prime of CRT representation.
- Returns:
- First prime of CRT representation
prime2
public java.math.BigInteger prime2()
- Second Prime of CRT representation.
- Returns:
- Second prime of CRT representation
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