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CryptographicException in BaseClient.Connect() #805
Description
Using SSH.NET 2020.0.1, occasionally CryptographicException is thrown in call to BaseClient.Connect():
System.Security.Cryptography.CryptographicException: Hash not valid for use in specified state.
at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
at System.Security.Cryptography.Utils.HashData(SafeHashHandle hHash, Byte[] data, Int32 cbData, Int32 ibStart, Int32 cbSize)
at System.Security.Cryptography.SHA1CryptoServiceProvider.HashCore(Byte[] rgb, Int32 ibStart, Int32 cbSize)
at System.Security.Cryptography.HashAlgorithm.ComputeHash(Byte[] buffer)
at Renci.SshNet.Security.Cryptography.CipherDigitalSignature.Sign(Byte[] input)
at Renci.SshNet.Security.KeyHostAlgorithm.Sign(Byte[] data)
at Renci.SshNet.PrivateKeyAuthenticationMethod.Authenticate(Session session)
at Renci.SshNet.ClientAuthentication.TryAuthenticate(ISession session, AuthenticationState authenticationState, String[] allowedAuthenticationMethods, SshAuthenticationException& authenticationException)
at Renci.SshNet.ClientAuthentication.Authenticate(IConnectionInfoInternal connectionInfo, ISession session)
at Renci.SshNet.ConnectionInfo.Authenticate(ISession session, IServiceFactory serviceFactory)
at Renci.SshNet.Session.Connect()
at Renci.SshNet.BaseClient.CreateAndConnectSession()
at Renci.SshNet.BaseClient.Connect()
Will try to gather more info and report back.
Activity
IgorMilavec commentedon May 4, 2021
When simultaneously trying to call SftpClient.Connect on multiple instances of SftpClient, there seems to be a race condition causing either the above exception or this exception to be thrown:
This last exception is actually wrong and I have created #818 to fix it.
Finding the root cause for this race is a work in progress.