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Class w3c.crypto.us.dsig.SigSuiteRSA
java.lang.Object
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+----w3c.www.dsig.SignatureSuite
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+----w3c.crypto.us.dsig.SigSuiteRSA
- public abstract class SigSuiteRSA
- extends SignatureSuite
Generic DSig Signature Suite for suites using the RSA signature
algorithm and the conventions like those defined for RSA/MD5 and
RSA/SHA1 in the DSig signature suite specifications. This class
cannot be used directly, it needs to be subclassed for each particular
hashing algorithm to be used. The subclass only needs to implemement
a public constructor with no arguments that calls
super(String suiteURL, String shortname, MessageDigest hash)
where hash
is an instance of the message digest algorithm
to be used, and shortname be either RSAMD5 or RSASHA1.
Note: the implementation of RSA algorithm is provided by RSA Security
Inc. (JSAFE COM.rsa.jsafe Java package). Therefore, you need to have
the JSAFE package in order for this class (and others) to run properly.
- See Also:
- SigSuiteRSASHA1, SigSuiteRSAMD5
-
SigSuiteRSA(String, String, MessageDigest)
- Constructor for use by its subclasses.
-
getBy()
- Return the By information itself.
-
getByType()
- Return the type of the By information given in this signature suite.
-
getKeyLength()
- Returns the key length of the RSA key used.
-
setBy(String, Object)
- Set the By information for this signature suite to the type
type and the value to signer.
-
sign(DSigLabelInterface, PrivateKey)
-
Sign the given label using the given private key, which
needs to be an instance of w3c.crypto.us.dsig.RSAPrivateKeyImpl.
-
verify(DSigLabelInterface, PublicKey)
-
Verify if this signature suite object correctly signs the
given label with the given public key.
SigSuiteRSA
protected SigSuiteRSA(String suiteURL,
String shortName,
MessageDigest hash)
- Constructor for use by its subclasses.
suiteURL
is the URL of the SigSuite. shortname
is the short name of the URL. hash
is the message digest
algorithm used to hash to label before signing for verification
of RSA is performed.
getKeyLength
public int getKeyLength()
- Returns the key length of the RSA key used. Returns -1 if
no key has been initialized.
- Overrides:
- getKeyLength in class SignatureSuite
verify
public Trivalue verify(DSigLabelInterface label,
PublicKey pubkey)
- Verify if this signature suite object correctly signs the
given label with the given public key. pubkey must either
be an instance of w3c.crypto.us.dsig.RSAPublicKeyImpl or null.
In that case the
public key will be extracted from the signature suite
if it is specified either as ByKey or as ByName (trying
a certificate lookup). If no valid public key can be found,
verify returns unknown. Else the signature will be verified
using that public key returning unknown if there was any
other problem verifying the signature or one of true/ false
to indicate the result.
- Overrides:
- verify in class SignatureSuite
- See Also:
- RSAPublicKeyImpl
sign
public DSigLabelInterface sign(DSigLabelInterface label,
PrivateKey privkey)
- Sign the given label using the given private key, which
needs to be an instance of w3c.crypto.us.dsig.RSAPrivateKeyImpl.
Signing automatically
sets the ByName property to "[anonymous]", that should be
set appropriately after signing. If this signature suite
object already contains a signature, it will be replaced by
the new one.
- Overrides:
- sign in class SignatureSuite
- See Also:
- RSAPrivateKeyImpl
setBy
public SignatureSuite setBy(String type,
Object signer)
- Set the By information for this signature suite to the type
type and the value to signer. Supported by this signature suite
are "ByName", which uses signer.toString() as the value;
and "ByKey" and "ByHash", in which cases signer has to be an
instance of DSAPublicKey. The method returns this signature suite
itself for success or null if there was an error.
NOTE: This method has to be called after signing in order
to have any effect.
- Overrides:
- setBy in class SignatureSuite
getByType
public String getByType()
- Return the type of the By information given in this signature suite.
This will return either one of the string "ByName", "ByKey", or
"ByHash" or null.
- Overrides:
- getByType in class SignatureSuite
getBy
public Object getBy()
- Return the By information itself. For ByName, this will return the
name as string, for ByKey it will return the name as a DSAPublicKey,
and for ByHash it will return the hash data as a byte array. In case
of any error or if no known by information was found this method
return null.
- Overrides:
- getBy in class SignatureSuite
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