COM.claymoresystems.provider
Class RawDSASignature
Signature
COM.claymoresystems.provider.RawDSASignature
public class RawDSASignature
extends Signature
A class to perform DSA signature and verification.
This is necessary because Sun's provider does not do raw mode.
See FIPS PUB 186, ANSI X9.57
protected Object | engineGetParameter(String param) - SPI: There aren't any parameters
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protected void | engineInitSign(PrivateKey key) - SPI: Initializes this object for signing
using the private key
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protected void | engineInitVerify(PublicKey key) - SPI: Initializes this object for verification
using the given key
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protected void | engineSetParameter(String param, Object value) - SPI: There aren't any parameters
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protected byte[] | engineSign() - Sign the input, following FIPS-186.
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protected void | engineUpdate(byte b) - SPI: Single byte updates are forbidden for
Raw DSA.
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protected void | engineUpdate(byte[] b, int off, int len) - SPI: Updates the digest.
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protected boolean | engineVerify(byte[] signature) - SPI: Raw Verify
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RawDSASignature
public RawDSASignature()
RawDSASignature
public RawDSASignature(String name)
engineGetParameter
protected Object engineGetParameter(String param)
throws InvalidParameterException
SPI: There aren't any parameters
engineInitSign
protected void engineInitSign(PrivateKey key)
throws InvalidKeyException
SPI: Initializes this object for signing
using the private key
engineInitVerify
protected void engineInitVerify(PublicKey key)
throws InvalidKeyException
SPI: Initializes this object for verification
using the given key
engineSetParameter
protected void engineSetParameter(String param,
Object value)
throws InvalidParameterException
SPI: There aren't any parameters
engineSign
protected byte[] engineSign()
throws SignatureException
Sign the input, following FIPS-186.
The signature is encoded following ANSI X9.57:
DSSSignature ::= SEQUENCE {
r INTEGER,
s INTEGER
}
engineUpdate
protected void engineUpdate(byte b)
throws SignatureException
SPI: Single byte updates are forbidden for
Raw DSA.
engineUpdate
protected void engineUpdate(byte[] b,
int off,
int len)
throws SignatureException
SPI: Updates the digest. Since we're doing
raw DSA, this must be a 20 byte string. This can
only be called once with a single digest value
or we throw an error
b
- the buffer containing the digestoff
- the offset into the bufferlen
- the length (must be 20)
engineVerify
protected boolean engineVerify(byte[] signature)
throws SignatureException
SPI: Raw Verify
Copyright (c) 1999-2001 Claymore Systems, Inc., All Rights Reserved.