public class HMAC
extends java.lang.Object
Constructor and Description |
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HMAC(java.security.MessageDigest digest,
byte[] key)
Creates a new HMAC instance
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HMAC(java.lang.String digestName,
byte[] key)
Creates a new HMAC instance
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Modifier and Type | Method and Description |
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void |
clear()
Resets the HMAC object for further use
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byte[] |
sign()
Signs the data (computes the secure hash)
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void |
update(byte[] b)
Adds data to the current hash
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void |
update(byte[] b,
int offset,
int length)
Adds data to the current hash
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boolean |
verify(byte[] signature)
Verifies the data (computes the secure hash and compares it to the input)
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public HMAC(java.security.MessageDigest digest, byte[] key)
digest
- The message digest object.key
- The secret keypublic HMAC(java.lang.String digestName, byte[] key)
digestName
- The name of the message digest function.key
- The secret key.public void update(byte[] b, int offset, int length)
b
- The dataoffset
- The index at which to start adding to the hashlength
- The number of bytes to hashpublic void update(byte[] b)
b
- The datapublic byte[] sign()
public boolean verify(byte[] signature)
signature
- The signature to compare againstpublic void clear()