Package netscape.security.provider
Class DSA
- java.lang.Object
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- java.security.SignatureSpi
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- java.security.Signature
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- netscape.security.provider.DSA
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public final class DSA extends java.security.Signature
The Digital Signature Standard (using the Digital Signature Algorithm), as described in fips186 of the National Instute of Standards and Technology (NIST), using fips180-1 (SHA-1).- Version:
- 1.86, 97/09/17
- Author:
- Benjamin Renaud
- See Also:
DSAPublicKey
,DSAPrivateKey
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Constructor Summary
Constructors Constructor Description DSA()
Construct a blank DSA object.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description protected java.lang.Object
engineGetParameter(java.lang.String key)
Deprecated.protected void
engineInitSign(java.security.PrivateKey privateKey)
Initialize the DSA object with a DSA private key.protected void
engineInitVerify(java.security.PublicKey publicKey)
Initialize the DSA object with a DSA public key.protected void
engineSetParameter(java.lang.String key, java.lang.Object param)
Deprecated.protected byte[]
engineSign()
Sign all the data thus far updated.protected void
engineUpdate(byte b)
Update a byte to be signed or verified.protected void
engineUpdate(byte[] data, int off, int len)
Update an array of bytes to be signed or verified.protected boolean
engineVerify(byte[] signature)
Verify all the data thus far updated.java.lang.String
toString()
Return a human readable rendition of the engine.-
Methods inherited from class java.security.Signature
clone, getAlgorithm, getInstance, getInstance, getInstance, getParameter, getParameters, getProvider, initSign, initSign, initVerify, initVerify, setParameter, setParameter, sign, sign, update, update, update, update, verify, verify
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Method Detail
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engineInitSign
protected void engineInitSign(java.security.PrivateKey privateKey) throws java.security.InvalidKeyException
Initialize the DSA object with a DSA private key.- Specified by:
engineInitSign
in classjava.security.SignatureSpi
- Parameters:
privateKey
- the DSA private key- Throws:
java.security.InvalidKeyException
- if the key is not a valid DSA private key.
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engineInitVerify
protected void engineInitVerify(java.security.PublicKey publicKey) throws java.security.InvalidKeyException
Initialize the DSA object with a DSA public key.- Specified by:
engineInitVerify
in classjava.security.SignatureSpi
- Parameters:
publicKey
- the DSA public key.- Throws:
java.security.InvalidKeyException
- if the key is not a valid DSA public key.
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engineSign
protected byte[] engineSign() throws java.security.SignatureException
Sign all the data thus far updated. The signature is formatted according to the Canonical Encoding Rules, returned as a DER sequence of Integer, r and s.- Specified by:
engineSign
in classjava.security.SignatureSpi
- Returns:
- a signature block formatted according to the Canonical Encoding Rules.
- Throws:
java.security.SignatureException
- if the signature object was not properly initialized, or if another exception occurs.- See Also:
engineUpdate(byte)
,engineVerify(byte[])
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engineVerify
protected boolean engineVerify(byte[] signature) throws java.security.SignatureException
Verify all the data thus far updated.- Specified by:
engineVerify
in classjava.security.SignatureSpi
- Parameters:
signature
- the alledged signature, encoded using the Canonical Encoding Rules, as a sequence of integers, r and s.- Throws:
java.security.SignatureException
- if the signature object was not properly initialized, or if another exception occurs.- See Also:
engineUpdate(byte)
,engineSign()
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engineSetParameter
protected void engineSetParameter(java.lang.String key, java.lang.Object param)
Deprecated.This implementation recognizes the following parameter:- Kseed
- a byte array.
- Specified by:
engineSetParameter
in classjava.security.SignatureSpi
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engineGetParameter
protected java.lang.Object engineGetParameter(java.lang.String key)
Deprecated.Return the value of the requested parameter. Recognized parameters are:- Kseed
- a byte array.
- Specified by:
engineGetParameter
in classjava.security.SignatureSpi
- Returns:
- the value of the requested parameter.
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engineUpdate
protected void engineUpdate(byte b)
Update a byte to be signed or verified.- Specified by:
engineUpdate
in classjava.security.SignatureSpi
- Parameters:
b
- the byte to updated.
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engineUpdate
protected void engineUpdate(byte[] data, int off, int len)
Update an array of bytes to be signed or verified.- Specified by:
engineUpdate
in classjava.security.SignatureSpi
- Parameters:
data
- the bytes to be updated.
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toString
public java.lang.String toString()
Return a human readable rendition of the engine.- Overrides:
toString
in classjava.security.Signature
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