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- java.lang.Object
-
- javax.crypto.spec.IvParameterSpec
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- All Implemented Interfaces:
- AlgorithmParameterSpec
public class IvParameterSpec extends Object implements AlgorithmParameterSpec
This class specifies an initialization vector (IV). Examples which use IVs are ciphers in feedback mode, e.g., DES in CBC mode and RSA ciphers with OAEP encoding operation.- Since:
- 1.4
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Constructor Summary
Constructors Constructor and Description IvParameterSpec(byte[] iv)
Creates an IvParameterSpec object using the bytes iniv
as the IV.IvParameterSpec(byte[] iv, int offset, int len)
Creates an IvParameterSpec object using the firstlen
bytes iniv
, beginning atoffset
inclusive, as the IV.
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Constructor Detail
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IvParameterSpec
public IvParameterSpec(byte[] iv)
Creates an IvParameterSpec object using the bytes iniv
as the IV.- Parameters:
iv
- the buffer with the IV. The contents of the buffer are copied to protect against subsequent modification.- Throws:
NullPointerException
- ifiv
isnull
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IvParameterSpec
public IvParameterSpec(byte[] iv, int offset, int len)
Creates an IvParameterSpec object using the firstlen
bytes iniv
, beginning atoffset
inclusive, as the IV.The bytes that constitute the IV are those between
iv[offset]
andiv[offset+len-1]
inclusive.- Parameters:
iv
- the buffer with the IV. The firstlen
bytes of the buffer beginning atoffset
inclusive are copied to protect against subsequent modification.offset
- the offset iniv
where the IV starts.len
- the number of IV bytes.- Throws:
IllegalArgumentException
- ifiv
isnull
or(iv.length - offset < len)
ArrayIndexOutOfBoundsException
- is thrown ifoffset
orlen
index bytes outside theiv
.
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