Use actual AlgorithmIdentifier type

Author: peterdettman

prov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/x509/X509SignatureUtil.java

@@ -116,9 +116,9 @@ static String getSignatureName(AlgorithmIdentifier sigAlgId)
             }
             if (X9ObjectIdentifiers.ecdsa_with_SHA2.equals(sigAlgOid))
             {
-                ASN1Sequence ecDsaParams = ASN1Sequence.getInstance(params);
+                AlgorithmIdentifier ecDsaParams = AlgorithmIdentifier.getInstance(params);
 
-                return getDigestAlgName((ASN1ObjectIdentifier)ecDsaParams.getObjectAt(0)) + "withECDSA";
+                return getDigestAlgName(ecDsaParams.getAlgorithm()) + "withECDSA";
             }
         }
 

prov/src/main/java/org/bouncycastle/jce/provider/X509SignatureUtil.java

@@ -74,9 +74,9 @@ static String getSignatureName(
             }
             if (sigAlgId.getAlgorithm().equals(X9ObjectIdentifiers.ecdsa_with_SHA2))
             {
-                ASN1Sequence ecDsaParams = ASN1Sequence.getInstance(params);
-                
-                return getDigestAlgName(ASN1ObjectIdentifier.getInstance(ecDsaParams.getObjectAt(0))) + "withECDSA";
+                AlgorithmIdentifier ecDsaParams = AlgorithmIdentifier.getInstance(params);
+
+                return getDigestAlgName(ecDsaParams.getAlgorithm()) + "withECDSA";
             }
         }