Class DESedeKeySpec
java.lang.Object
javax.crypto.spec.DESedeKeySpec
- All Implemented Interfaces:
- KeySpec
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Field SummaryFieldsModifier and TypeFieldDescriptionstatic final intThe constant which defines the length of a DESede key in bytes.
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Constructor SummaryConstructorsConstructorDescriptionDESedeKeySpec(byte[] key) Creates a DESedeKeySpec object using the first 24 bytes inkeyas the key material for the DES-EDE key.DESedeKeySpec(byte[] key, int offset) Creates a DESedeKeySpec object using the first 24 bytes inkey, beginning atoffsetinclusive, as the key material for the DES-EDE key.
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Method SummaryModifier and TypeMethodDescriptionbyte[]getKey()Returns the DES-EDE key.static booleanisParityAdjusted(byte[] key, int offset) Checks if the given DES-EDE key, starting atoffsetinclusive, is parity-adjusted.
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Field Details- 
DES_EDE_KEY_LENpublic static final int DES_EDE_KEY_LENThe constant which defines the length of a DESede key in bytes.- See Also:
 
 
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Constructor Details- 
DESedeKeySpecCreates a DESedeKeySpec object using the first 24 bytes inkeyas the key material for the DES-EDE key.The bytes that constitute the DES-EDE key are those between key[0]andkey[23]inclusive- Parameters:
- key- the buffer with the DES-EDE key material. The first 24 bytes of the buffer are copied to protect against subsequent modification.
- Throws:
- NullPointerException- if- keyis null.
- InvalidKeyException- if the given key material is shorter than 24 bytes.
 
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DESedeKeySpecCreates a DESedeKeySpec object using the first 24 bytes inkey, beginning atoffsetinclusive, as the key material for the DES-EDE key.The bytes that constitute the DES-EDE key are those between key[offset]andkey[offset+23]inclusive.- Parameters:
- key- the buffer with the DES-EDE key material. The first 24 bytes of the buffer beginning at- offsetinclusive are copied to protect against subsequent modification.
- offset- the offset in- key, where the DES-EDE key material starts.
- Throws:
- NullPointerException- if- keyis null.
- InvalidKeyException- if the given key material, starting at- offsetinclusive, is shorter than 24 bytes
 
 
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Method Details- 
getKeypublic byte[] getKey()Returns the DES-EDE key.- Returns:
- the DES-EDE key. Returns a new array each time this method is called.
 
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isParityAdjustedChecks if the given DES-EDE key, starting atoffsetinclusive, is parity-adjusted.- Parameters:
- key- a byte array which holds the key value
- offset- the offset into the byte array
- Returns:
- true if the given DES-EDE key is parity-adjusted, false otherwise
- Throws:
- NullPointerException- if- keyis null.
- InvalidKeyException- if the given key material, starting at- offsetinclusive, is shorter than 24 bytes
 
 
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