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java.lang.Objectcom.ibm.crypto.provider.RC4KeySpec
public class RC4KeySpec
This class specifies a RC4 secret key.
Constructor Summary | |
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RC4KeySpec(byte[] key)
Constructs a secret key from the given byte array. |
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RC4KeySpec(byte[] key,
int offset)
Constructs a secret key from the given byte array, using the first len bytes of key , starting at
offset inclusive. |
Method Summary | |
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byte[] |
getKey()
Returns the key material of this secret key. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public RC4KeySpec(byte[] key) throws InvalidKeyException
key
- the key material of the secret key.
InvalidKeyException
public RC4KeySpec(byte[] key, int offset) throws InvalidKeyException
len
bytes of key
, starting at
offset
inclusive.
The bytes that constitute the secret key are
those between key[offset]
and
key[offset+len-1]
inclusive.
This constructor does not check if the given bytes indeed specify a
secret key of the specified algorithm. For example, if the algorithm is
DES, this constructor does not check if key
is 8 bytes
long, and also does not check for weak or semi-weak keys.
In order for those checks to be performed, an algorithm-specific key
specification class (in this case:
DESKeySpec
must be used.
key
- the key material of the secret key.offset
- the offset in key
where the key material
starts.len
- the length of the key material.algorithm
- the name of the secret-key algorithm to be associated
with the given key material.
InvalidKeyException
- See Appendix A in the
Java Cryptography Extension API Specification & Reference
for information about standard algorithm names.Method Detail |
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public byte[] getKey()
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