How To Check Integrity Of A Encrypted String Then Converted To Base64
Mar 25, 2011
I encrypt and decrypt a string with a private key and following functions. so I encrypt a string with Encrypt function and decrypt the encrypted string with decrypt function. If someone can change the encrypted string and then it decrypts with decrypt function, the decrypted string isn't equal to plain text before encrypting. I want to know how can I check is decrypted string equals to plain text before encrypting?
I'm getting the following error in my event log appears many times each hour, if somebody could shed some light it would be very nice... Also I am running server 2008 web server, this is NOT a webfarm.
I know that I could use HttpServerUtility.UrlTokenDecode Method to do the job. But the problem is that I am using .NET 1.1 and this method is only supported in .NET 2.0+. Also I found that Convert.ToBase64String method is not an option because of the differences addressed here. So what other options do I have? Do I have to write my own converting method?
I am creating a web site in .Net 3.5 , I am converting the string into Base64String to send it through querystring.The Response.Redirect works fine for smaller string. But if the original string size is 1670,the response.redirect results in error "Page can not be found".item is the string in below code snippet.
byte[] data = Encoding.Default.GetBytes(item); return Convert.ToBase64String(data)
I am using the following code to decode base 64 and quoted printable encoded messages. It works well for all the charset's except for quoted printable chinese (Charsets: GB18030, GB2312). When I tried to decode, I am getting '?' as output. provide on this code or any other code that decodes all types of encoded string?
i have created a encrypted string to match with a target string to pass it along with client URL for authentication. it doesn't match. here is an algorithm used to create a encrypted string.
I have tried using .NET's various encryption functions but all my encrypted strings are at least 24, 28 or 32 in length.
I have heard of CipherMode.CTS with Padding = None that produces the same length output as the input length but I can't seem to get the same result. I have toyed with the block-size, key-size and salt size.
I don't mind adding a digit to my input string to make it 16 in length.
I am looking to get varbinary data, that looks similar to this in the database, 0x640009002B007A... etc converted back into a string and then into the EnDeCrypt function to regain the sensitive data.
How to run asp.net application with encrypted web.config ,is it possible note that ASP.NET application have a database with encrypted connectionstring and a "cannot read connection string " message is generated
I'm running into following error: "The viewstate is invalid for this page and might be corrupted." "Invalid character in base64 string." Only with IE 8.0. Firefox works fine. The persisted view state is
i.e. two identical parts separated by a comma. I'm using a form with both jQuery and UpdatePanel. I've inspected the __VIEWSTATE hidden field before the post __doPostBack and $I.System.InvokePageMethod. In both cases the viewstate does NOT contain the comma. where the field gets doubled up with the comma inserted? Or how to fix.
System.ArgumentException:Keyword not supported: 'eF8w9r2UJOsk0Ps3pxmV7/Fy/xPR2hN2S7BrC1iOYNnAUaI8AqkSm5bw7r+ta4sePWSV9t/3Spnpz6wsFpvMmcppNpqM5Zk7iiDqWVgIV4k='.
Line 46: string[] roleNames; Line 47: roleNames = Roles.GetAllRoles();
On the WebFrmSales.aspx, regarding the textbox controls, after the user have updated the SQL SERVER table with it. I tried to write the coding to clear all the textbox control but it not working.
This is the error message generated:
Error 6 Value of type 'String' cannot be converted to 'System.Web.UI.Control'.
I have datalist bind with sql datasourceI have update command
Protected Sub DataList1_UpdateCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.DataListCommandEventArgs) Dim ID As String = DataList1.DataKeys(e.Item.ItemIndex).ToString() Dim title As TextBox = CType(e.Item.FindControl("textCategoryName"), TextBox) Dim image As FileUpload = CType(e.Item.FindControl("FileUpload1"), FileUpload)
[Code] ....
It shows the error in the line
SqlDataSource1.UpdateParameters("image").DefaultValue = image.FileBytes Value of byte can not be connverted to string
I also change the sql datasource parameters for image from object to byte
I have this following problem in Visual studio 2005, VB and sql server 2005.
when i am trying to read the data from the database getting this error ("I have this following problem in Visual studio 2005, VB dot net application")
[code]....
' we run this application in around 10 braches. Its getting failed only in 1-2 braches. Rest of the Breches code is running well. ( all System configurations are same in all the braches )
I want to generate a link http://site/?code=xxxxxxxxxx
Where xxxxxxxxxx is an encrypted string generated from the string user01. And I will need to convert it back later.Is there a simple way to encrypt and decrypt a string like this?
I have this error "The given value of type String from the data source cannot be converted to type datetime of the specified target column." when I used sqlbulkcopy to do the transaction
I'll try to explain as simple as I can in text what my problem is. I don't see any other way to make my issue clear.
I have a GridView that uses an ObjectDataSource.
The ObjectDataSource has an DataObjectTypeName defined, so I pass/get complete objects or list of objects to/from the data access methods.
The objects I'm working with, let's say we work with Book objects, contain a Title and a Category, BUT the Category is an object itself. When the Select method is called, we get a List of Book objects, which is perfectly displayed, overridden ToString method in the Category objects within the Book objects.
The problem I face is that I can't find a way to update the category in my GridView. What I did already accomplish is:I used a template field in the GridView for the Category so I could use a DropDownList for that field in Edit mode.
I bound the DropDownList to another ObjectDataSource that gives me a list of CategoryObjects.
So when I enter Edit mode... the row shows a nice ddl with the available categories. It even selects the right original category.
So far so good... but when I want to save my new selection, I get an error that a string (the selected category in the ddl) cannot be converted to a Category object (that's what the Book object, that is going to be used for the update, expects).
I have checked Enforce Referential Integrity in my relationship section in my access database.By this way Can I delete child records when I delete the perent record?
I have a WCF service. For security reasons, I need to ensure that all 3 goals of security are attained (Privacy, Integrity and Authentication). We are planning to use x.509 certificate. My question is, Does just using x.509 certificate for message security ensure me of all 3 goals?
I am planning to set up the x.509 certificates as mentioned in following article
