src/java.base/share/classes/sun/security/util/SignatureUtil.java

*** 103,118 ****
      public static AlgorithmParameterSpec getParamSpec(String sigName,
              byte[] paramBytes)
              throws ProviderException {
          sigName = checkName(sigName);
          AlgorithmParameterSpec paramSpec = null;
!         if (paramBytes != null) {
!             if (sigName.toUpperCase().indexOf("RSA") == -1) {
!                 throw new ProviderException
!                      ("Unrecognized algorithm for signature parameters " +
!                       sigName);
!             }
              AlgorithmParameters params =
                  createAlgorithmParameters(sigName, paramBytes);
              paramSpec = RSAUtil.getParamSpec(params);
          }
          return paramSpec;
--- 103,113 ----
      public static AlgorithmParameterSpec getParamSpec(String sigName,
              byte[] paramBytes)
              throws ProviderException {
          sigName = checkName(sigName);
          AlgorithmParameterSpec paramSpec = null;
!         if (paramBytes != null && sigName.toUpperCase().indexOf("RSA") != -1) {
              AlgorithmParameters params =
                  createAlgorithmParameters(sigName, paramBytes);
              paramSpec = RSAUtil.getParamSpec(params);
          }
          return paramSpec;