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.
|Constructor and Description|
Constructs a secret key from the given byte array, using the first
|Modifier and Type||Method and Description|
Returns the name of the algorithm associated with this secret key.
Returns the key material of this secret key.
Returns the name of the encoding format for this secret key.
public SecretKeySpec(byte key, int offset, int len, java.lang.String algorithm)
key, starting at
The bytes that constitute the secret key are
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
must be used.
key- the key material of the secret key.
offset- the offset in
keywhere 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. See Appendix A in the Java Cryptography Extension Reference Guide for information about standard algorithm names.
public java.lang.String getAlgorithm()
public java.lang.String getFormat()
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