au.net.aba.crypto.provider
Class MD5withRSA
java.lang.Object
|
+--java.security.SignatureSpi
|
+--java.security.Signature
|
+--au.net.aba.crypto.provider.MD5withRSA
- public class MD5withRSA
- extends java.security.Signature
This algorithm implements the Signature algorithm of "MD5 with RSA"
as defined in PKCS#1. The algorithm returns an ecnrypted block
containing an ASN.1 DigestInfo structure.
AlgorithmIdentifier ::= SEQUENCE {
algorithm OBJECT IDENTIFIER,
parameters ANY DEFINED BY algorithm OPTIONAL
}
DigestInfo ::= SEQUENCE {
digestAlgorithm DigestAlgorithmIdentifier,
digest Digest }
digestAlgorithmIdentifier ::= AlgorithmIdentifier
Digest ::= OCTET STRING
id-md5 OBJECT IDENTIFIER ::= { 1 2 840 113549 2 5 }
md5Identifier :== AlgorithmIdentifier { id-md5, NULL }
Fields inherited from class java.security.Signature |
SIGN,
state,
UNINITIALIZED,
VERIFY |
Fields inherited from class java.security.SignatureSpi |
appRandom |
Method Summary |
protected java.lang.Object |
engineGetParameter(java.lang.String param)
This algorithm does not support parameters. |
protected void |
engineInitSign(java.security.PrivateKey privateKey)
Initializes this signature object with the specified
private key for signing operations. |
protected void |
engineInitVerify(java.security.PublicKey publicKey)
Initializes this signature object with the specified
public key for verification operations. |
protected void |
engineSetParameter(java.lang.String param,
java.lang.Object value)
This algorithm does not support parameters. |
protected byte[] |
engineSign()
Returns the signature block for all the data update so far. |
protected void |
engineUpdate(byte b)
Updates the data to be signed or verified using the specified byte. |
protected void |
engineUpdate(byte[] b,
int off,
int len)
Updates the data to be signed or verified, using the specified
array of bytes, starting at the specified offset. |
protected boolean |
engineVerify(byte[] sigBytes)
Verifies the passed-in signature. |
Methods inherited from class java.security.Signature |
clone,
getAlgorithm,
getInstance,
getInstance,
getParameter,
getProvider,
initSign,
initSign,
initVerify,
setParameter,
setParameter,
sign,
sign,
toString,
update,
update,
update,
verify |
Methods inherited from class java.security.SignatureSpi |
engineInitSign,
engineSetParameter,
engineSign |
Methods inherited from class java.lang.Object |
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
MD5withRSA
public MD5withRSA()
engineInitVerify
protected void engineInitVerify(java.security.PublicKey publicKey)
throws java.security.InvalidKeyException
- Initializes this signature object with the specified
public key for verification operations.
- Parameters:
publicKey
- the public key of the identity whose signature is
going to be verified.- Throws:
- java.security.InvalidKeyException - if the key is improperly
encoded, parameters are missing, and so on.
- Overrides:
- engineInitVerify in class java.security.SignatureSpi
engineInitSign
protected void engineInitSign(java.security.PrivateKey privateKey)
throws java.security.InvalidKeyException
- Initializes this signature object with the specified
private key for signing operations.
- Parameters:
privateKey
- the private key of the identity whose signature
will be generated.- Throws:
- java.security.InvalidKeyException - if the key is improperly
encoded, parameters are missing, and so on.
- Overrides:
- engineInitSign in class java.security.SignatureSpi
engineUpdate
protected void engineUpdate(byte b)
throws java.security.SignatureException
- Updates the data to be signed or verified using the specified byte.
- Parameters:
b
- the byte to use for the update.- Throws:
- java.security.SignatureException - if the engine is not initialized
properly.
- Overrides:
- engineUpdate in class java.security.SignatureSpi
engineUpdate
protected void engineUpdate(byte[] b,
int off,
int len)
throws java.security.SignatureException
- Updates the data to be signed or verified, using the specified
array of bytes, starting at the specified offset.
- Parameters:
data
- the array of bytes.off
- the offset to start from in the array of bytes.len
- the number of bytes to use, starting at offset.- Throws:
- java.security.SignatureException - if the engine is not initialized
properly.
- Overrides:
- engineUpdate in class java.security.SignatureSpi
engineSign
protected byte[] engineSign()
throws java.security.SignatureException
- Returns the signature block for all the data update so far.
This block is a PKCS#1 encrypted block of a BER encoded
ASN.1 DigestInfo block.
- Returns:
- the signature bytes of the signing operation's result.
- Throws:
- java.security.SignatureException - if the engine is not
initialized properly.
- Overrides:
- engineSign in class java.security.SignatureSpi
engineVerify
protected boolean engineVerify(byte[] sigBytes)
throws java.security.SignatureException
- Verifies the passed-in signature. The signature block is
an RSA encrypted block containing a DER encoded ASN.1
DigestInfo structure.
- Returns:
- true if the signature was verfied, false if not.
- Overrides:
- engineVerify in class java.security.SignatureSpi
engineSetParameter
protected void engineSetParameter(java.lang.String param,
java.lang.Object value)
throws java.security.InvalidParameterException
- This algorithm does not support parameters. This method
will throw an exception to indicate so.
- Overrides:
- engineSetParameter in class java.security.SignatureSpi
engineGetParameter
protected java.lang.Object engineGetParameter(java.lang.String param)
throws java.security.InvalidParameterException
- This algorithm does not support parameters. This method
will throw an exception to indicate so.
- Overrides:
- engineGetParameter in class java.security.SignatureSpi