| java.lang.Object
 javax.crypto.spec.SecretKeySpec
| SecretKeySpec | | public class SecretKeySpec implements KeySpec,Key(Code) | | This class specifies a secret key in a provider-independent fashion.
It can be used to construct a SecretKey from a byte array.
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.
version:
1.16, 07/31/01 |
| Constructor Summary | |
| public | 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 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. |
| Method Summary | |
| public String | getAlgorithm()
Returns the name of the algorithm associated with this secret key. | | public byte[] | getEncoded()
Returns the key material of this secret key. | | public String | getFormat()
Returns the name of the encoding format for this secret key. |
| SecretKeySpec | | public SecretKeySpec(byte[] key, int offset, int len, String algorithm)(Code) | | Constructs a secret key from the given byte array, using the first
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
must be used.
Parameters:
key - the key material of the secret key.
Parameters:
offset - the offset in key where the key materialstarts.
Parameters:
len - the length of the key material.
Parameters:
algorithm - the name of the secret-key algorithm to be associatedwith the given key material.See Appendix A in the Java Cryptography Extension Reference Guidefor information about standard algorithm names. |
| getAlgorithm | | public String getAlgorithm()(Code) | | Returns the name of the algorithm associated with this secret key.
the secret key algorithm. |
| getEncoded | | public byte[] getEncoded()(Code) | | Returns the key material of this secret key.
the key material |
| getFormat | | public String getFormat()(Code) | | Returns the name of the encoding format for this secret key.
the string "RAW". |
|
|