I am trying to generate signature using ECDSA with binary curve (B163) . Also i am using Bouncy Castle libraries. but it generate error like this-
Exception in thread "main" java.lang.IllegalAccessError: tried to access method java.security.Provider.<init>(Ljava/lang/String;DLjava/lang/String;)V from class ECCKey
at ECCKey.main(ECCKey.java:13)
how can this error be resolved?
Security.addProvider(new BouncyCastleProvider());
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ECDSA", "BC");
ECGenParameterSpec ecSpec = new ECGenParameterSpec("B-163");
keyGen.initialize(ecSpec, new SecureRandom());
KeyPair keyPair = keyGen.generateKeyPair();
Signature signature = Signature.getInstance("ECDSA", "BC");
signature.initSign(keyPair.getPrivate(), new SecureRandom());
byte[] message = "abc".getBytes();
signature.update(message);
Related
Im trying to use the MicroOrm.Dapper.Repositories but the usage sample left me hanging on where to get the SqlGenerator object. It's sample documentation is:
public UserRepository(IDbConnection connection, ISqlGenerator<User> sqlGenerator)
: base(connection, sqlGenerator)
{
Amy I using this right:
var conn = new MySqlConnection("connectionStringXYZ");
var generator = new SqlGenerator<User>();
var userRepo = new UserRepository(conn, generator);
which gives me internal server error 500.
You should be able to do:
ISqlGenerator<User> userSqlGenerator = new SqlGenerator<User>(ESqlConnector.MySQL);
Preferably the generator should be a singleton, possibly an injected one.
But your error is an http error, so I suppose you are swallowing the real exception somewhere in your application. Find out the underlying reason.
I need to put a message into an Azure ServiceBus queue from an SSIS package running under SQL Server 2014. As suggested in this post: connecting to azure service bus queue from ssis,
I wrote a Script Task that references the "Azure SDK 2.9". This approach has worked for me with Azure Storage Accounts to work with blobs (referencing the Microsoft.WindowsAzure.Storage assembly), but it is NOT working for the Azure Storage Bus (referencing the Microsoft.ServiceBus assembly). Any calls I make into that assembly trigger a Run-time exception: "exception has been thrown by the target of an invocation: at System.RuntimeMethodHandle.InvokeMethod(...)" When I comment out all calls to the Microsoft.ServiceBus assembly it runs fine, so it is obviously something about the assembly reference (version 2.4). I tried updating to the latest version with NuGet (version 3.0) and that made no difference.
So my question is: has anybody been able to place a message in an Azure Service Bus queue from SSIS, and if so, how did you do it?
Since somebody will ask for my Script Task code, I'm posting it:
#region Namespaces
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
#endregion
#region CustomNamespaces
using Microsoft.ServiceBus;
using Microsoft.ServiceBus.Messaging;
#endregion
namespace ST_dba6519c1eda4e0c968485a6eb7a6c29
{
[Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute]
public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
{
public void Main()
{
try
{
// Create the message for the Queue
string ClientShortName = Dts.Variables["$Package::ClientShortName"].Value.ToString();
bool bExtendedForecast = (bool)Dts.Variables["$Package::ExtendedForecast"].Value;
var msg = new BrokeredMessage(ClientShortName + ": ExtendedForecast=" + bExtendedForecast.ToString()); // this statement throws the exception
// get Service Bus Connection Information from the Package Parameters
string SBAccessKey = Dts.Variables["$Package::ServiceBusAccessKey"].Value.ToString();
string SBNamespace = Dts.Variables["$Package::ServiceBusNamespace"].Value.ToString();
string SBQueue = Dts.Variables["$Package::ServiceBusQueueName"].Value.ToString();
String connStr = "Endpoint=sb://" + SBNamespace +
".servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=" + SBAccessKey;
// First Method tried
Uri SBUri = ServiceBusEnvironment.CreateServiceUri(String.Empty, SBNamespace, String.Empty); // this statement throws the exception
TokenProvider SBToken = TokenProvider.CreateSharedAccessSignatureTokenProvider("RootManageSharedAccessKey", SBAccessKey);
NamespaceManager nsMgr = new NamespaceManager(SBUri, SBToken);
MessagingFactory msgFactory = MessagingFactory.Create(nsMgr.Address, nsMgr.Settings.TokenProvider);
QueueClient queueClient2 = msgFactory.CreateQueueClient(SBQueue);
queueClient2.Send(msg);
// Second Method tried
MessagingFactory factory = MessagingFactory.CreateFromConnectionString(connStr); // this statement throws the exception
MessageSender queueSender = factory.CreateMessageSender(SBQueue);
queueSender.Send(msg);
// Third Method tried
QueueClient queueClient = QueueClient.CreateFromConnectionString(connStr, SBQueue); // this statement throws the exception
queueClient.Send(msg);
Dts.TaskResult = (int)ScriptResults.Success;
}
catch
{
Dts.TaskResult = (int)ScriptResults.Failure;
}
}
#region ScriptResults declaration
enum ScriptResults
{
Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
};
#endregion
}
}
So, of course 10 minutes after I post the question, I hit upon the answer. I had to run GACUTIL -i Microsoft.ServiceBus. Once that was done, I chose to use the Third Method in the code (the simplest) to Send the message, and it worked fine.
I am currently using Spring 4.1.6 with a RestTemplate to consume a third party webservice with JSON which I cannot change its behavior.I am using Jackson databind v2.6.0.
Problem: Sometimes the service returns for a member a hashmap {member:{"key":"value",...}} sometimes the same member is just an empty array {member:[]}. So I can not ignore the property by default.
Is there a way to configure the deserialization to ignore empty arrays? I saw a jackson property "WRITE_EMPTY_JSON_ARRAYS" but I am not quite sure how I can use it with my restTemplate and spring configuration.
Are there other possiblities e.g. use some combination of #JsonXXX Annotations? I saw #JsonSerialize which can be used on class level, but I don't like to write a deserializer for all my classes just to handle this situation (However if there is no other way of course I will do)
Example responses to llustrate the behavior of the service:
response with a hashmap
{"id":170,"categories":{"13":"caro"}}
response with empty array of the same member
{"id":170,"categories":[]}
Example of my RestTemplate usage:
BasicAuthRequestFactory requestFactory = new BasicAuthRequestFactory(httpClient);
restTemplate = new RestTemplate(requestFactory);
Article a = restTemplate.getForObject(new URI("http://..."), Article.class);
Error:
caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token
at [Source: java.io.PushbackInputStream#4aa21f9d; line: 1, column: 1456] (through reference chain: ResponseArticleWrapper["data"]->Article["categories"])
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)
Example of my current annotated class:
#JsonIgnoreProperties(ignoreUnknown = true)
#JsonInclude(Include.NON_NULL)
public class Article {
#JsonProperty("id")
private Integer id;
#JsonProperty("categories")
private Map<Integer,String> categories = new HashMap<Integer,String>();
}
Thank you in advance for any hints and examples.
Since jackson-databind 2.5 there is DeserializationFeature for handling this case. It's turned off by default, so you need to configure it in your ObjectMapper:
#Bean
public ObjectMapper objectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(DeserializationFeature.ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT, true);
return objectMapper;
}
You can see how the custom ObjectMapper for RestTemplate is configured here: How can we configure the internal Jackson mapper when using RestTemplate?
After you're done with the configuration, you can just let Spring wire it for you in your class:
#Autowired
private RestOperations restTemplate;
and use the provided restTemplate instance.
I'm facing following problem:
I'm using CXF for REST services. For exception handling I'm using javax.ws.rs.ext.ExceptionMapper and in public Response toResponse(T ex) I want to return some object, for example
class MyObject {
String detail;
}
example implementation of method is similar to
public Response toResponse(T ex) {
MyObject o = new MyObject();
o.detail = "...";
return Response.status(400).entity(o).build();
}
but I'm having problem
org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor writeResponseErrorMessage
WARNING: No message body writer has been found for response class RequestError.
Somehow I found that when I specify MediaType
return Response.status(400).entity(o).type("application/json").build();
everything is ok, but I do not know which type client accepts...
Of course I can somewhere store which types client accepts and later use the correct one, but this smells. I'd like to use something nicer.
For example in my CXF endpoint I can specify, using #Produces, what kind of MediaTypes my controller method produces and CXF/Spring select the correct one. I tried it in my ExceptionMapper too, but it doesn't work.
u can do it like this
#Context HttpHeaders headers;
public Response toResponse(Exception e) {
ExceptionEntity ee = new ExceptionEntity(e);
ResponseBuilder rb = Response.status(Response.Status.INTERNAL_SERVER_ERROR);
rb.type(headers.getMediaType());
rb.entity(ee);
Response r = rb.build();
return r;
}
i'm using cxf-rs 2.7.5
Hope you can help.
I'm trying to copy a blob using the Protocol namespace along with a shared access signature, but the WebResponse always throws a 404 Not Found error. I have successfully used the Get/Post/Delete/List methods (where the 404 would be thrown if the permissions were insufficient), but I cannot find the answer here.
Here's some simple code that I am using:
Uri uriFrom = new Uri("file://mymachine/myfile.txt");
Uri uriTo = new Uri("file://mymachine/myfile1.txt");
//get shared access signature - set all permissions for now
uriTo = GetSharedAccessSignature(uriTo, SharedAccessPermissions.Write |
SharedAccessPermissions.Read | SharedAccessPermissions.List);
//NOTE: This returns my uriTo object in the following format:
//http://mystoragespace.blob.core.windows.net/mycontainer/steve1.txt?se=2011-07-04T12:17:18Z&sr=b&sp=rwdl&sig=sxhGBkbDJpe9qn5d9AB7/d2LK1aun/2s5Bq8LAy8mis=
//get the account name
string accountName = uriTo.Host.Replace(".blob.core.windows.net", string.Empty);
//build the canonical string
StringBuilder canonicalName = new StringBuilder();
canonicalName.AppendFormat(System.Globalization.CultureInfo.InvariantCulture,
"/{0}/mycontainer{1}", accountName, uriFrom.AbsolutePath);
//NOTE: my canonical string is now "/mystoragespace/mycontainer/myfile.txt"
//get the request
var request = BlobRequest.CopyFrom(uriTo, 300, canonicalName.ToString(),
null, ConditionHeaderKind.None, null, null);
request.Proxy.Credentials = CredentialCache.DefaultNetworkCredentials;
//perform the copy operation
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
//do nothing. the file has been copied
}
So, my uriTo seems to have the appropriate permissions (I've tried various combinations) and the canonical string seems to have the correct source string. I'm not using snapshot functionality. The proxy isn't a problem as I've successfully used other methods.
Hope someone can help...
Many regards,
Steve
From Creating a Shared Access Signature:
The following table details which operations are allowed on a resource for a given set of permissions.
...
Create or update the content, block list, properties, and metadata of the specified blob. Note that copying a blob is not supported.