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java.lang.Object | +--javax.crypto.spec.SecretKeySpec
This class specifies a secret key in a provider-independent fashion.
It can be used to construct a SecretKey from a byte array, without having to go through a (provider-based) SecretKeyFactory.
This class is only useful for raw secret keys that can be represented as a byte array and have no key parameters associated with them, e.g., DES or Triple DES keys.
Key
,
KeyFactory
, Serialized FormFields inherited from interface java.security.Key |
serialVersionUID |
Constructor Summary | |
SecretKeySpec(byte[] key,
int offset,
int len,
String algorithm)
Constructs a secret key from the given byte array, using the first len bytes of key, starting at offset. |
|
SecretKeySpec(byte[] key,
String algorithm)
Constructs a secret key from the given byte array. |
Method Summary | |
boolean |
equals(Object obj)
Overides equals() in Object superclass |
String |
getAlgorithm()
Returns the name of the algorithm associated with this secret key. |
byte[] |
getEncoded()
Returns the key material of this secret key. |
String |
getFormat()
Returns the name of the encoding format for this secret key. |
int |
hashCode()
Calculates a hash code value for the object. |
Methods inherited from class java.lang.Object |
clone,
finalize,
getClass,
notify,
notifyAll,
toString,
wait,
wait,
wait |
Constructor Detail |
public SecretKeySpec(byte[] key, String algorithm)
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.algorithm
- the name of the associated algorithm.public SecretKeySpec(byte[] key, int offset, int len, String algorithm)
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 standard name of the associated key
algorithm. See Appendix A in the Java Cryptography
Extension API Specification & Reference for information
about standard algorithm names.Method Detail |
public String getAlgorithm()
public String getFormat()
public byte[] getEncoded()
public int hashCode()
public boolean equals(Object obj)
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