#vulnerable code 
                             public static String getSecurityProviderName() {
		if (securityProviderName == null) {
			Provider provider = null;
			if (LOGGER.isDebugEnabled())
				LOGGER.debug("Providers={}",
						Arrays.toString(Security.getProviders()));
			boolean isAndroid = System.getProperty("java.runtime.name")
					.toLowerCase().contains("android");
			if (isAndroid) {
				if (Security.getProvider("SC") != null)
					securityProviderName = "SC";
				else {
					provider = hasClass("org.spongycastle.jce.provider.BouncyCastleProvider");
					if (provider != null)
						securityProviderName = "SC";
				}
			} else if (Security.getProvider("BC") != null)
				securityProviderName = "BC";
			else {
				if (provider == null) {
					provider = hasClass("org.bouncycastle.jce.provider.BouncyCastleProvider");
					if (provider != null)
						securityProviderName = "BC";
				}
				if (provider == null) {
					provider = hasClass("com.sun.crypto.provider.SunJCE");
					if (provider != null)
					{
	                    throw new RuntimeException("BouncyCastle Security Provider not available! Not recommended SunJCE Security Provider is found, use it with CryptoUtil.setSecurityProviderName.");                      
					}
				}
				if (provider != null)
					securityProviderName = provider.getName();

			}
			if (securityProviderName != null)
				LOGGER.info("Using SecurityProvider {}", securityProviderName);
			else
				throw new RuntimeException("NO SECURITY PROVIDER AVAILABLE!");
		}
		return securityProviderName;
	} 
                            #location 8 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             public static String getSecurityProviderName() {
		if (securityProviderName == null) {
			if (LOGGER.isDebugEnabled()) {
				LOGGER.debug("Providers={}",
						Arrays.toString(Security.getProviders()));
			}
			boolean isAndroid = System.getProperty("java.vendor")
					.toLowerCase().contains("android");
			if (isAndroid) {
				securityProviderName = "SC";
			} else{
				securityProviderName = "BC";
			}
		}
		return securityProviderName;
	}