Rebex.sftp "unable to load DLL 'Bcrypt.dll'" when running on Linux

Question

Hi,
Right now I am using Rebex.Sftp library for my sftp server project(Asp.Net Core Console App), I am using .Net Core 2.0 version and my OS is Ubuntu 16.04.3 LTS. The project runs exception free in Windows environment, but when I tried to publish and run in my Linux system, the following exceptions popped up:

2018-04-05 14:15:12.081 ERROR FileServer(1)[8] SSH: Session 1: Error while processing packet SSHMSGPACKET32. Key exchange failed. Error: Rebex.30: Error while processing packet SSHMSGPACKET32. Key exchange failed. ---> Rebex.30: Key exchange failed. ---> System.TypeInitializationException: The type initializer for 'Rebex.b87f' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'Bcrypt.dll': The specified module or one of its dependencies could not be found.
(Exception from HRESULT: 0x8007007E)
at Rebex.f9.e4(44& p0, String p1, String p2, UInt32 p3)
at Rebex.871d..ctor(a44c p0, UInt32 p1)
at Rebex.b87f.df()
at Rebex.b87f.44()
at Rebex.b87f.85()
at Rebex.b87f..ctor(a44c p0, String p1, Func2 p2) at Rebex._b87f..ctor(_a44c p0, CipherMode p1, Func2 p2)
at Rebex.b87f..cctor()
--- End of inner exception stack trace ---
at Rebex.b87f.39(a44c p0, CipherMode p1)
at Rebex.Security.Cryptography.SymmetricKeyAlgorithm.5b(Boolean p0)
at Rebex.45.ce()
at Rebex.e0.3d()
at Rebex.e0.66(df p0, 739c p1)
--- End of inner exception stack trace ---
at Rebex.e0.66(df p0, 739c p1)
at Rebex.eff2.f4(Int32 p0, Int32 p1)
--- End of inner exception stack trace ---
at Rebex.eff2.f4(Int32 p0, Int32 p1)
at Rebex.eff2.f4()
at Rebex.eff2.b5(Int32 p0, Int32 p1, Int32 p2, Int32 p3, SocketException p4)
2018-04-05 14:15:12.141 ERROR FileServer(1)[8] Server: Session 1: Error: Rebex.30: Error while processing packet SSHMSGPACKET32. Key exchange failed. ---> Rebex.30: Key exchange failed. ---> System.TypeInitializationException: The type initializer for 'Rebex.b87f' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'Bcrypt.dll': The specified module or one of its dependencies could not be found.
(Exception from HRESULT: 0x8007007E)
at Rebex.f9.e4(44& p0, String p1, String p2, UInt32 p3)
at Rebex.871d..ctor(a44c p0, UInt32 p1)
at Rebex.b87f.df()
at Rebex.b87f.44()
at Rebex.b87f.85()
at Rebex.b87f..ctor(a44c p0, String p1, Func2 p2) at Rebex._b87f..ctor(_a44c p0, CipherMode p1, Func2 p2)
at Rebex.b87f..cctor()
--- End of inner exception stack trace ---
at Rebex.b87f.39(a44c p0, CipherMode p1)
at Rebex.Security.Cryptography.SymmetricKeyAlgorithm.5b(Boolean p0)
at Rebex.45.ce()
at Rebex.e0.3d()
at Rebex.e0.66(df p0, _739c p1)
--- End of inner exception stack trace ---
at Rebex.e0.66(df p0, 739c p1)
at Rebex.eff2.f4(Int32 p0, Int32 p1)
--- End of inner exception stack trace ---
at Rebex.eff2.f4(Int32 p0, Int32 p1)
at Rebex.eff2.f4()
at Rebex.eff2._b5(Int32 p0, Int32 p1, Int32 p2, Int32 p3, SocketException p4)

So could you please provide some workaround to resolve this?

Answer 1

Hi, we have just released Rebex SFTP 2018 R1 that fixes this issue. Please give it a try and let us know whether it works.

Comments

Thank you very much for providing the workaround. Now it works fine.