Oaep Padding Error

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Rsa Decrypt Error Occurred While Decoding Oaep Padding

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Rsacryptoserviceprovider Oaep Padding

down vote favorite I've read many articles regarding this problem and I cannot seem to find an answer that solves my bug. I have a WCF service; my app sends the public RSA key generated and the service returns a set of AES key+IV encrypted with the public key, but when my app then tries to decrypt the keys, I either get "Error occurred while decoding OAEP padding"

Rsa Oaep Padding C#

(if I pass true to useOAEP) or "The parameter is incorrect" (if I pass false to useOAEP). For simplicity, this is the entire code used put together, leaving Exception handling aside: public static string EncryptAES(byte[] aesKey, byte[] aesIV, string publicRSAKey) { using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider()) { rsa.FromXmlString(publicRSAKey); byte[] encryptedKey = rsa.Encrypt(aesKey, true); byte[] encryptedIV = rsa.Encrypt(aesIV, true); return string.Format("{0}{1}{2}", Convert.ToBase64String(encryptedKey), "\n", Convert.ToBase64String(encryptedIV)); } } public static byte[] Decrypt(string aesKeyorIV) { using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider()) { byte[] buffer = Convert.FromBase64String(aesKeyorIV); rsa.FromXmlString(RSA_Private_Key); return rsa.Decrypt(buffer, true); //Exception thrown here } } (RSA_Private_Key is generated in the static constructor using rsa.ToXmlString(true)) (publicRSAKey is passed to the service by sending rsa.ToXmlString(false) in the static constuctor) I tried using Encrypt/Decrypt(byte[], false) but it didn't make any difference. I also tried Array.Reverse(encryptedKey) and then Array.Reverse(buffer). The private key is never sent/modified after it's set so that cannot be it. I'm out of ideas and debugging the WCF service is pretty horrible. c# wcf encryption rsa share|improve this question edited Sep 1 '15 at 2:05 Andrew Savinykh 11.3k64373 asked Sep 1 '15 at 1:10 Camilo Terevinto 2,58831033 @zespri, I said I'm encrypting the AES key with RSA. Besides, I am not getting any error

Language Runtime Internals and Architecture Question 0 Sign in to vote I am developing a server app that utilizes the RSACryptoServiceProvider class to decrypt an encrypted symmetric key, which is then used to decrypt a c# decrypt with public key file. The asymmetric key is stored in a key container. If I run my server

Rsacryptoserviceprovider Decrypt With Public Key

ap as a console app all works as designed, but if i run the server as a window service I receive the rsaparameters public key c# crypto exception "error occurred while decoding OAEP padding.". My first thought was  maybe its a permissions issue with the key container, but when I step through the code it seems to have no problem instantiating a RSACryptoServiceProvider http://stackoverflow.com/questions/32322113/rsacryptoserviceprovider-error-occurred-while-decoding-oaep-padding with the key maintaind in the container. I am running the window service under the Local System account, so I can't imagine that would be an issue, but such assumptions have led me astray many other times. Any ideas? Thanks M.D.A Thursday, August 17, 2006 10:03 PM Reply | Quote Answers 0 Sign in to vote I have hit the wall on this one - KeyContainer is now created in MachineKeys and has access set https://social.msdn.microsoft.com/Forums/vstudio/en-US/c3b80dbb-bf0c-4947-924d-b4d5e414c0e1/oaep-padding-error-but-not-always?forum=clr to SYSTEM and User(.\username) Console app run in user account context works. App run as window service (LocalSystem) throws OAEP error. (Note - If I change window service to run as local user and it works). I have spent all of today searching for ideas as to why this error is occuring for LocalSystem account. CspParameters cp = new CspParameters(); cp.KeyContainerName = ContainerName; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp); // Retreive encrypted iv from file FileStream fs = new FileStream(_path, FileMode.Open); byte[] encryptedIV = new byte[128]; fs.Read(encryptedIV, 0, 128); _iv = rsa.Decrypt(encryptedIV, true); // Exception thrown Any idea(s) would be greatly appreciated. M.D.A Thursday, August 17, 2006 10:58 PM Reply | Quote All replies 0 Sign in to vote I have hit the wall on this one - KeyContainer is now created in MachineKeys and has access set to SYSTEM and User(.\username) Console app run in user account context works. App run as window service (LocalSystem) throws OAEP error. (Note - If I change window service to run as local user and it works). I have spent all of today searching for ideas as to why this error is occuring for LocalSystem account. CspParameters cp = new CspParameters(); cp.KeyContainerName = ContainerName; RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp); // Retreive encrypted iv from file FileSt

Sign in Pricing Blog Support Search GitHub This repository Watch 19 Star 222 Fork 147 bergie/passport-saml Code Issues 24 Pull requests 14 Projects 0 Pulse Graphs New https://github.com/bergie/passport-saml/issues/76 issue "Invalid RSAES-OAEP padding" Error #76 Closed petermikitsh opened this Issue Feb 6, 2015 · 6 comments Projects None yet Labels None yet Milestone No milestone Assignees No one http://beachbc.blogspot.com/2008/12/rsa-in-c-net.html assigned 2 participants petermikitsh commented Feb 6, 2015 Here's my SAML Configuration: var samlStrategy = new saml.Strategy({ callbackUrl: 'https://myServer.rit.edu/login/callback', entryPoint: 'https://shibboleth.main.ad.rit.edu/idp/profile/SAML2/Redirect/SSO', issuer: 'https://myServer.rit.edu/shibboleth', identifierFormat: null, decryptionPvk: fs.readFileSync('/var/www/saml/key.pem', 'utf8'), cert: 'MIIDV......' }, oaep padding function(profile, done) { return done(null, profile); }); Routes: app.get('/', passport.authenticate('saml', {failureRedirect: '/login/fail'}), function(req, res) { res.send('Authenticated'); } ); app.post('/login/callback', passport.authenticate('saml', { failureRedirect: '/login/fail' }), function(req, res) { res.redirect('/'); } ); General error catcher: app.use(function(err, req, res, next){ console.log('Express error!'); console.log("the error: " + JSON.stringify(err)); next(err); }); Shibboleth processes the request and a SAMLResponse is present in the header of error occurred while callback route, /login/callback. An error is thrown at passport.authenticate('saml', {failureRedirect: '/login/fail'}) in the / route. Console log: Express error! the error: {"message":"Invalid RSAES-OAEP padding."} Any ideas? Collaborator ploer commented Feb 6, 2015 Well, this is the error message you receive when the encrypted assertion does not match the private key you have supplied. I.e., your shibboleth provider has a public key for you that does not match the decryptionPvk you are supplying. Not sure if that is what you are seeing here, but the poor error message has bitten me several times in the past, I've been meaning to look into what we can do to give a better error here. (it is being passed up from the underlying xmlenc library, not something generated directly by passport-saml) petermikitsh commented Feb 6, 2015 I've confirmed with my identity provider that the correct public key is on file. Collaborator ploer commented Feb 6, 2015 Then the next debugging step that comes to mind would be to step into the xmlenc decrypt call (or add some debug logging), and check if everything looks correct in there. It's definitely an error f

encrypted string.Decrypt: takes an encrypted string and returns a plain text string.1)Server:Generate a RSA public and private key.Pass the public key in plain text to the client2)Client:Pass a plain string to RSAObjectPass encrypted string from RSAObject to Server.3)Server:Pass encrypted string to RSAObjectUse decrypted string from RSAObject.PROBLEMS:My origional code for encrypting and decrypting data:public string Encrypt(string plainText) { try { byte[] plainData = Encoding.UTF32.GetBytes(plainText); byte[] encryptedData = crypto.Encrypt(plainData, true); return Encoding.UTF32.GetString(encryptedData); } catch (Exception ex) { Console.WriteLine(ex.ToString()); return ""; } } public string Decrypt(string encryptedText) { try { byte[] encryptedData = Encoding.UTF32.GetString(encryptedText); byte[] plainData = crypto.Decrypt(encryptedData, true); return Encoding.UTF32.GetString(plainData); } catch (Exception ex) { Console.WriteLine(ex.ToString()); return ""; } }All I would get during decryption from crypto, a RSACryptoServiceProvider object, was one of two exceptions:Bad LengthError occurred while decoding OAEP padding.After reading up more on RSA I discovered that a UTF32(32bit) can't properly handle the data returned by crypto.Encrypt, therefore some of my bytes were being changed in the conversion process to UTF32, and therefor could not be decrypted. use Convert.ToBase64String(string)SOLUTION:Encrypt method needs to convert to a 64bit string.Decrypt method needs to convert from a 64bit string.fixed and working source code:public string Encrypt(string plainText) { try { byte[] plainData = Encoding.UTF32.GetBytes(plainText); byte[] encryptedData = crypto.Encrypt(plainData, true); return Convert.ToBase64String(encryptedData); } catch (Exception ex) { Console.WriteLine(ex.ToString()); return ""; } } public string Decrypt(string encryptedText) { try { byte[] encryptedData = Convert.FromBase64String(encryptedText); byte[] plainData = crypto.Decrypt(encryptedData, true); return Encoding.UTF32.GetString(plainData); } catch (Exception ex) { Console.WriteLine(ex.ToString()); return ""; } }cheers,-bb Posted by Bradley Beach at 3:38 PM Labels: .NET, c#, cryptogrophy, Network, programming, RSA No comments: Post a Comment Newer Post Home Subscribe to: Post Comments (Atom) Blog Archive ► 2010 (1) ► June (1) ► 2009 (5) ► October (1) ► May (2) ► April (1) ► January (1) ▼ 2008 (2) ▼ December (2) Strings to bytes and encoding. RSA in C# .NET About Me Bradley Beach Computer Programmer and Musician. View my co