VS 2010 X509 How To Use Public Key To Encrypt
May 7, 2010
I am trying to do some x509 encryption and I am getting lost. I have generated my own self signed cert with OpenSSL, but am confused as to how to use my public key to encrypt.I found a few examples online, but in the first one, I do not see where you provide your cert or key for the encryption. url....The seccond is in C#, and although i can make sense of most of it, the line in particular tha tlooks important, but I can't translate to VB is this one: url....
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Apr 3, 2012
I am loading a certificate from string like this:
public static void Test()
{
byte[] arrayCertificate;
[Code]....
But this certificate doesn't have a "Subject Unique Identifier" Take a look at this:
[URL] (The part of Structure of a certificate)
And I want to know how can I read that value from my .NET code (I looked that I can get SerialNumber, Thumbprints and others but there is no Subject UID anywhere).
If anyone can share an openssl command to include this UID for the certificate :-) (pfx one)
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Nov 4, 2010
I don't know where it thinks I'm casting.
Here is my property
''' <summary>
''' Gets the GetX509Certificate from a file.
''' </summary>
[Code]....
and heres where it says im doing the illegal cast:
Dim cert As System.Security.Cryptography.X509Certificates.X509Certificate2 = Me.GetX509Certificate
Why is it saying that? Everything is defined in the right type but it still thinks I'm casting.
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Nov 4, 2010
I have a signedXML object Dim signedXml As New SignedXml (envelope)I need to set the SigningKey property of this object signedXml.SigningKey..I also have my certificate object Dim cert As X509Certificate = Me.GetX509Certificate...How can I set the SigningKey property of signedXml using my cert.In .NET 2.0 each X509Certificate had a 'Key' property which returned an RSA object, but in 3.5 this property is removed.
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Apr 11, 2012
Greetings, I am trying to install a certificate from a .p12 file into the Local Machine - Personal store and set the permissions for Everyone to full control. I can acheive this manually with mmc on W7 (or mmc + WSE Certificate Tool on XP.) When attempting with the vb.net code below I get no errors but when I try to access the security tab (Manage Private Keys in mmc on W7, or WSE Certificate Tools on XP) I get the error, "No keys found for certificate!"
I am using the following code to install the certificate, which seems to be working. However I am not convinced its placing the private key in the correct place. I have tried two methods for setting permissions on the private key and the second method, which locates the private key file indicates the private key is being stored under usersmy-user-account... Should that be a public account
[Code]...
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Mar 24, 2012
i'm doing a bifid cipher project now my code is almost finish.. the problem is every i put a space the space will disappear when I encrypt take a look at my code
[Code]...
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Jan 31, 2012
I am after some code to encrypt/decrypt a file, with a feature to display theencryption/decryption process percentage.The following code works well for strings, but when I tried to use it on byte arrays, I get an out of memory error.
Public Function AESEncrypt(ByVal PlainText As String, ByVal Password As String, ByVal salt As String)
Dim HashAlgorithm As String = "SHA1" 'Can be SHA1 or MD5
[code].....
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Jan 29, 2012
I have this code which works well:
Public Function AESEncrypt(ByVal PlainText As String, ByVal Password As String, ByVal salt As String)
Dim HashAlgorithm As String = "SHA1" 'Can be SHA1 or MD5
Dim PasswordIterations As String = 2
Dim InitialVector As String = "CanEncryption123" 'This should be a string of 16 ASCII characters.
Dim KeySize As Integer = 256 'Can be 128, 192, or 256.
[Code] .....
What I am after is this: Rather than having a string to encrypt/decrypt, I have a byte array.
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Mar 29, 2012
I need some guidence to determine how to use DPAPI to encrypt passwords and server entries in the app.config. All examples I came across seem to refer to 3.5 and earlier, VS 2008, platforms. Does anyone have an example that will work for VS2010 in 4.0?
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Sep 20, 2011
I'm attempting to create a little library to encrypt and decrypt Files with AES. There are loads of examples of how to do this on the internet so coding is not a problem. There are however a few questions regarding cryptography and AES in general.
#1 Does the IV need to be kept a secret like the key ?
#2 Can I just hash a string with SHA512 to make a key for AES ? or do I need to use PasswordDeriveBytes ?
#3 In the case of me using PasswordDeriveBytes Do I need to keep the salt a secret ?(or do I need to keep it at all)
#4 Can I generate the IV from the same password that the Key is derived from ?(if so How ?)
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Feb 10, 2011
I can access a module from code behind but not from the aspx page in inline VB code <% ... %>.
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Jul 22, 2010
Public MustInherit Class SingleInstanceForm(Of T As SingleInstanceForm)
Inherits Form
End Class
[code]...
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Apr 7, 2011
Imports System
Imports System.Threading
Imports System.ComponentModel[code]....
how to declare "smsport" on class smscomms as public so that it can be access in class form1 or button1_click event.
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Aug 26, 2010
How do declare a public variable .aspx web page that can be used in all the pages within my web application?
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Aug 26, 2011
I'm having trouble on calling a public sub on another form. Here is the sub:
Public Sub BOTAO_NUMERICO(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles N0.Click, N1.Click, N2.Click, N3.Click, N4.Click, N5.Click, N6.Click, N7.Click, N8.Click, N9.Click
Dim Res_ant As String
Dim Res_atu As Double
If (Res <> 0) Then
[Code] .....
On form Normal, BOTAO_NUMERICO works fine, but on Cientifica it don't.
OBS: All objects on both forms are the same, with same name.
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Mar 30, 2011
I have a MDI application and a very complicated class there which populates its properties from a dataset derived from an external database. Each form, including child forms have to be able to access that class and use its properties thorughout the whole session.I don't know where to 'preserve' these property values within the application. I kmow many books etc. suggest not to use public variables but I really can't find a way to solve this other than to use a public variable (which is a list(of my custom class) in this case.
I have a separate class called PublicItems.vb and declared there my public variable as
Public Shared secuniverse As List(Of myCustomClass)Is there something wrong with the syntax because if I try to use the variable secuniverse in my main application class, I get the following exception:'sectoruniverse' is not declared. It may be inaccessible due to its protection level.
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Jul 22, 2011
I am somewhat stuck on this little problem, I am using Visual Basic 2010
Error3Too many arguments to 'Public Function Calculations(txtSoilTemp As Double, txtSupplyTemp As Double, txtCarrierPipeWallThickness As Double, txtInsulationThickness As Double, txtJacketThickness As Double, txtExternaldiameterofcarrierpipe As Double,
[code].....
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Aug 10, 2010
Unit test method that has Public Read Only property, how do I set the public read only property?target.MyReadOnlyProperty = MyObject
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Jan 24, 2012
I'm a little out of my comfort zone here having programmed in VB6 quite a few years ago things have changed a lot since then.My issue is I have a class that I've built which works with no issues but I would like to be able to keep a 'handle' of some description on this class so I can also make adjustments to it's parameters when the user changes something. My problem is that I need to do this for an unknown quantity of these class instances.
In the VB.Net language how would I create an instance of this class that could be accessed by any Sub within the application and each instance created can be individually accessed by specifying some sort of identifier?
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Apr 18, 2012
I'm struggling with a thing or two...and i've read some stuff about the backgroundworker but im stuck Basically what i have is a : PUBLIC FUNCTION TEST (path as string) : which at the end of work , adds an item to the form1.listbox. That works quite nice but freezes the app. I've tried using the backgroundworker, the function in the background worker seems to work nicely, the bad thing is that i dont get any results in the form1.listbox.
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Jul 13, 2011
I was wondering if someone could explain to me the differences between these 2 ways of accessing a class property.Access Way : 1 (To me this looks like im declaring the property of the class as a Global variable which can be changed anywhere
[Code]...
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Feb 4, 2012
I have a program in vb.net and with it I have an expiration Key. As an example I would like this key to be valid for 3 months .I don't want to use the users system.date in case the user changes the date.Could a public server's date time be used instead.
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Jun 26, 2011
I've got a program that runs from one Windows form, Form1, with stuff declared all in that class: public variables, public functions, subs, etc. I decided that the form was getting cluttered, so I added one button to bring up a new form, Form2, and I put some of the buttons & check boxes for testing over there, so that Form1 can be more visually clean. Problem: when I go to put the code for the tests into the buttons on Form2, none of the public variables or subs or functions that reside in Form1 are visible in Form2. What statement/s do I need to add (and where) so that the public "stuff" that's declared in the class for Form1 is visible within Form2, please?
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Dec 7, 2011
In my vb.net winforms application using Visual Studio 2010, I'm trying to work something out and my brain just isn't working today. I'm rewriting this application to make it more efficient and trying to minimize the sql calls.
Currently it works like this.User logs in to the app, it loads the main form, where the user can open up different forms to access different client data. Each time a record is loaded in one of these new forms it also loads that specific users permissions from a Sql Server 2005 table.
What I want to do is when my main form loads after the user logs in, is load a public dataset or datatable, or any other suggestion, storing that users permissions so I can access them locally without hitting the sql server every time the user opens a client record.
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Dec 25, 2011
what is the error in the bleow: 'Public Event OnFilterAdded()' is an event, and cannot be called directly. Use a 'RaiseEvent' statement to raise an event. Note: the error line is italic underline
Imports System
Imports System.Collections
Imports System.Configuration
[Code].....
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Jun 12, 2012
lI think I almost have this done but I get and error "'Public ReadOnly Property Right As Integer' has no parameters and its return type cannot be indexed." here is the line causing the error:
[Code]...
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Nov 30, 2011
I need to convert the following code, so that it exists as a created class "Payroll" that utilizes "Get" and "Set" elements. Unfortunately, I'm completely lost.
Public Class frmPayroll
Private Sub frmPayroll_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
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Jun 12, 2011
I want to know what implies to declare a function or a sub using public or directly Sub / Function i.e.:
Public Function Whatever()
' Process
End Function
versus.
Function Whatever()
' Process
End Function
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May 27, 2012
Parameters.ReferencedAssemblies.Add("System.dll")
Parameters.ReferencedAssemblies.Add("System.Data.dll")
Parameters.ReferencedAssemblies.Add("System.Windows.Forms.dll")
is a way to encrypt "systems.dll" in the add() value?
something like Add(Char64+char45+...) or any method???
Dim Version = New Dictionary(Of String, String)
Version.Add("CompilerVersion", "v2.0")
[Code]...
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Apr 8, 2009
I have an app that I'm calling up a 3rd party API.. and on each call I want to store off the patient data in to logs that are like weekly.. so on each call to the API I want to encrypt the data and push as a line into a file..I kinda dont want to open the file.. add in data then encrypt the whole file, that seems like extra work to me.so if I want to encypt the data from string to byte whats the best way to push into a file and then read out.. should I set the string to be a certain lenght so my writes and reads match up ? or is there a way to write to a data file so that it knows the end of the entry ? should I use a type class for this ?
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