When i try to encrypt it goes fine.. but when i right after try to decrypt it i get an:"Length of the data to decrypt is invalid" error... the error occours when i try to run the code FlushFinalBlock();here is my code:
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I am using encryption/decryption logic from the following link: [URL] Code from this page is working but at times, its throwing an error while decyption as 'Length of the data to decrypt is invalid'. I have a very limited knowledge on this topic so I am no able to troubleshoot it further
View 1 RepliesI am doing a project in VS2008 with asp.net,C#. I need to encrypt loginId which is of type Guid. How is this done.
View 3 RepliesI'm teaching myself ASP.net. I'm creating an application that needs to store sensitive data. So, I found the following Blog to encrypt and decrypt data.
[URL]
I'm sure it's my app, but I wanted to make sure I'm not missing anything obvious. For some reason, my app and Encryptor only works when I pass < then 7 characters. If a pass 8, it doesn't commit to the database. If I remove Encryptor, the app will store
I use asp.net + MVC1.0 and in a webpage I have several forms, within each forms I have called the following function
AntiForgeryToken() to generate a hidden value, and in Controller function I have a validate attribute.
When I use JMeter and capture the token using regular expression then post the token with my form to server, I found it throw such a exception:
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Q: I face the following big problem :
from time to another i find the following exception:
Invalid length for a Base-64 char array I use encryption and decryption: public static string Encrypt(string text)
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it is really annoying that I am keep getting these error. what is that. we started to get this afte we updatet the net framawork for security vulnaribility. here is the error we keep getting. but not everytime;
System.FormatException: Invalid length for a Base-64 char array.
Generated: Thu, 07 Oct 2010 04:05:16 GMT
System.Web.HttpException: The state information is invalid for this page and might be corrupted. ---> System.Web.UI.ViewStateException: Invalid viewstate.
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I have an asp.net page where I have used FormsAuthentication.HashPasswordForStoringInConfigFile. Encrypted password is saved in database. I have created a forgotPassword page. Where I need to send user his password. How can I decrypt it and send it to user. if SHA1 can not be decryoted what other option should I use to encrypt the passwords?
View 5 Replieshow to Encrypt and Decrypt Password?
I want to store the password in database by encrypting it and want to decrypt when user will log in on to the application.
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How do I call the "decrypt" and "Encrypt"? I want to display the result in TextBox1.text
i am encrypting textbox value in md5 using this coding and passing as querystring , and on other page i want to decrypt.....
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Ok this one might be a bit tough to figure out, but each day when users open their application the following error is generated and they can not enter the application: "Failed to decrypt using provider 'EncryptionProvider'. Error message from the provider: The RSA key container could not be opened." Guess what fixes it... I have to open the application 1 time and then all of the users can being to open the application. This is not an issue with the encryption/decryption of the .config never having worked; it works just fine - but not all of the time. It sounds like a permissions issue to me, like me opening the app grants access to the key file for a time period, and the next day the issue starts all over again. Here is what I have already done (actually when I set up encryption originally), as the many, many posts with this issue are resolved with, but none have worked:
- aspnet_regiis -pa "MyWebKeys" "NT AuthorityNETWORK SERVICE"
- aspnet_regiis -pa "MyWebKeys" "ASPNET"
- Gave ASPNET account read access to "C:Documents and SettingsAll UsersApplication DataMicrosoftCryptoRSAMachineKeys" folder
- Gave NETWORK SERVICE account read access to "C:Documents and SettingsAll UsersApplication DataMicrosoftCryptoRSAMachineKeys" folder
I did not do the following, since I am not using the deafult machinekeys, but rather the imported "MyWebKeys" container
- aspnet_regiis -pa "NetFrameworkConfigurationKey" "NT AuthorityNETWORK SERVICE"
- aspnet_regiis -pa "NetFrameworkConfigurationKey" "ASPNET"
Here is how the file is encrypted:
aspnet_regiis -pef "appSettings" "C:MyProject" -prov "MyEncryptionProvider"
"MyWebKeys" are an imported key container on the server, that upon importing reside in the default "C:Documents and SettingsAll UsersApplication DataMicrosoftCryptoRSAMachineKeys" directory. So it appears I have covered everything, right? What am I missing? Do I have to add individual users or groups with the pa command that use my application to allow access to the container? Remember the encryption/decryption does work 95% of the time. It just seems that each day in the morning, I must open the app once prior to the users being able to open the application, which tells me it is a permissions issue because I am an Admin on the server and they are not, but I thought all of this runs under the NETWORK SERVICE account anyways?)
Due to a bug in Flash, I have to use the ASPXAuth cookie to log a user in on a page that a flash upload script calls after upload. See this page for more information: [URL]
I have to make the ASPXAUTH string "public" in the sense that it will be in the HTML of the page. My question is, how secure is this?
I understand that anyone that can get to the string in the HTML can probably get to it from the cookie just as easily, but let's say someone does have this ASPXAUTH string. Is it possible that they can login as another user using this cookie? Would they be able to decrypt it?
I have these settings.. in my webconfig..
enablePasswordRetrieval="true"
enablePasswordReset="true"
requiresQuestionAndAnswer="false"
So i dont need to use Q and A for password retrevial ( I use email password recovery), but I would like to use Q and A as and Admin, just as that higher level of secuirty.How can I turn off the encryption of the answer of the Q and A, or decrypt it in a report or something ???
I am working on encryption and decryption and able to encrypt and decrypt a Text file but not able to do the same for MS Word or any other file other than Text file. I am using a below code.
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I'm trying to programmatically encrypt the connectingstrings section of my web.config, using the below code, which I have gotten from here.
[URL]
The problem is that nothing happens when I click encrypt.
This is my code.
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And this is the web.config
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Has I understand is the section should be encrypted, but it never happens.
I have a HyperLink column in a gridview that when clicked should navigate the user to another page. I pass parameters to the page using a querystring. i want to encrypte the querystring when it passed to another page
View 1 Replieshow to decrypt and encrypt password in table membership in aspnet databas ?
View 8 Repliesam working on a new site and i want to do tothings for security1. I want to encrypt the password of the user who register on my site and also decrypt it to enable him in login again.2. I will make an online exams so I want to disable the user functions to hack the exams materials such as (print page, print screen , or even selecting data manual by mouse )I googled a lot about this matter I found java scripts to make this but what about the users who will disable scripts on their browsers. So I want to do this with C# Code.
View 4 RepliesI am here to generate a unique pin no of fixed length. All my previously generate pin no are stored in database and i want newly generated pin no to be unique.
I want to combine serial no and custom key and generate unique pin no.
Anyone know why the minimum password length is 6 chars?
I can't find any reference to this anywhere.
How to Encrypt a string using C# and Decrypt that string using javascript?
View 2 Repliesi dont realy understand how do i encrypt / decrypt using asp.netall the explainations in MDSN are hard.
i want to encrypt to database, decrypt from database.
I'm trying a simple encryption procedure, encrypting/decrypting a HEX value. Encryption seems to work fine: result of encryption is "85772B6784BC1505". While trying to decrypt I get an "Invalid data"-exception.
CODE:
Dim x1 As UInt64 = DES.DES_EncryptCode("&H" & "0123456789ABCDEF")
Dim x2 As UInt64 = DES.DES_DecryptCode(x1)
Private Shared KEY_64() As Byte = {7, 6, 5, 4, 3, 2, 1, 0}
Private Shared IV_64() As Byte = {0, 1, 2, 3, 4, 5, 6, 7}
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I have some sensitive data that will be stored in one of my database tables, how would I go about encrypting it while saving it to the database and then decrypting it when retreiving it? I am using VB.NET
View 2 Replies