/**
* @param digest ObjectIdentifier
* @param encryption ObjectIdentifier
* @return String <digest>with<encryption>
*/
public static String getSigningAlgorithm(ObjectIdentifier digest, ObjectIdentifier encryption) {
StringBuffer sb = new StringBuffer();
if (digest.equals(SHA1)) {
sb.append("SHA1");
} else if (digest.equals(SHA256)) {
sb.append("SHA256");
} else if (digest.equals(SHA384)) {
sb.append("SHA384");
}
sb.append("with");
if (encryption.equals(RSA)
|| encryption.equals(SHA1withRSA)
|| encryption.equals(SHA256withRSA)) {
sb.append("RSA");
} else if (encryption.equals(SHA256withRSAPSS)) {
sb.append("RSAandMGF1");
} else if (encryption.equals(ECDSA)
|| encryption.equals(SHA256withECDSA)
|| encryption.equals(SHA384withECDSA)) {
sb.append("ECDSA");
}
if (debug) {
System.out.println("Constructed SigAlg Name: " + sb.toString());
}
return sb.toString();
}
/**
* Method getSigningAlgorithm.
*
* @param sigalg ObjectIdentifier
* @return String
* @throws NoSuchAlgorithmException
*/
public static String getSigningAlgorithm(ObjectIdentifier sigalg)
throws NoSuchAlgorithmException {
if (sigalg.equals(SHA1withRSA)) {
return "SHA1withRSA";
} else if (sigalg.equals(SHA256withRSA)) {
return "SHA256withRSA";
} else if (sigalg.equals(SHA256withECDSA)) {
return "SHA256withECDSA";
} else if (sigalg.equals(SHA384withECDSA)) {
return "SHA384withECDSA";
} else {
throw new NoSuchAlgorithmException("Algorithm not included in NIST 800-78");
}
}
/**
* Constructor for AlgorithmIdentifier.
*
* @param oid ObjectIdentifier
* @param param AlgorithmParameters
* @throws ASN1Exception
*/
public AlgorithmIdentifier(ObjectIdentifier oid, AlgorithmParameters param) throws ASN1Exception {
this.ident = ASN1Factory.encodeASN1Object(new Tag(Tag.OBJECTID), oid.getEncoded());
this.ai.addComponent(this.ident);
if (param == null) {
try {
this.param = new NULL();
} catch (TLVEncodingException e) {
throw new ASN1Exception(e);
}
this.ai.addComponent(this.param);
}
}