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.
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.
->secret-key-specclj
(->secret-key-spec key algorithm)(->secret-key-spec key offset len algorithm)Constructor.
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 (in this case: DESKeySpec) must be used.
key - the key material of the secret key. The first len bytes of the array beginning at offset inclusive are copied to protect against subsequent modification. - byte[]
offset - the offset in key where the key material starts. - int
len - the length of the key material. - int
algorithm - the name of the secret-key algorithm to be associated with the given key material. See Appendix A in the Java Cryptography Architecture Reference Guide for information about standard algorithm names. - java.lang.String
throws: java.lang.IllegalArgumentException - if algorithm is null or key is null, empty, or too short, i.e. key.length-offset<len.
Constructor. 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 (in this case: DESKeySpec) must be used. key - the key material of the secret key. The first len bytes of the array beginning at offset inclusive are copied to protect against subsequent modification. - `byte[]` offset - the offset in key where the key material starts. - `int` len - the length of the key material. - `int` algorithm - the name of the secret-key algorithm to be associated with the given key material. See Appendix A in the Java Cryptography Architecture Reference Guide for information about standard algorithm names. - `java.lang.String` throws: java.lang.IllegalArgumentException - if algorithm is null or key is null, empty, or too short, i.e. key.length-offset<len.
equalsclj
(equals this obj)Tests for equality between the specified object and this object. Two SecretKeySpec objects are considered equal if they are both SecretKey instances which have the same case-insensitive algorithm name and key encoding.
obj - the object to test for equality with this object. - java.lang.Object
returns: true if the objects are considered equal, false if
obj is null or otherwise. - boolean
Tests for equality between the specified object and this object. Two SecretKeySpec objects are considered equal if they are both SecretKey instances which have the same case-insensitive algorithm name and key encoding. obj - the object to test for equality with this object. - `java.lang.Object` returns: true if the objects are considered equal, false if obj is null or otherwise. - `boolean`
get-algorithmclj
(get-algorithm this)Returns the name of the algorithm associated with this secret key.
returns: the secret key algorithm. - java.lang.String
Returns the name of the algorithm associated with this secret key. returns: the secret key algorithm. - `java.lang.String`
get-encodedclj
(get-encoded this)Returns the key material of this secret key.
returns: the key material. Returns a new array
each time this method is called. - byte[]
Returns the key material of this secret key. returns: the key material. Returns a new array each time this method is called. - `byte[]`
get-formatclj
(get-format this)Returns the name of the encoding format for this secret key.
returns: the string RAW. - java.lang.String
Returns the name of the encoding format for this secret key. returns: the string `RAW`. - `java.lang.String`
hash-codeclj
(hash-code this)Calculates a hash code value for the object. Objects that are equal will also have the same hashcode.
returns: a hash code value for this object. - int
Calculates a hash code value for the object. Objects that are equal will also have the same hashcode. returns: a hash code value for this object. - `int`
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