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> I'm struggling to authenticate with an OpenSSH Server (Windows server 2022) using public key authentication.
> I used "ssh-keygen -t rsa" command to create private/public key and put the public key into the Server ~/.ssh/id_rsa.pub and can connect to the Server via "ssh login@xx.x.xxx.x" DOS command,
> But I received the error "0x800A7540" when using wodSSH lib publickey authauthenticate to connect to the Server (I have no problem when using password authentication via wodSSH to connect to the Server). 
> I also used ModKeys lib to generate private/public Keys "pKeys->Generate(ktype, var)".
> if I used "pKeys->get_PublicKeySSH" to retrieve the public key, then I put it into Sever ~/.ssh2/authorized_keys.pub,  and create ~/.ssh2/authorization which should have a line of text Key authorized_keys.pub in a separate line of the file 
> if I used pKeys->get_PublicKeyOpenSSH(ktype, &pubkey)" to get public key, then I put it into the Sever  ~/.ssh/authorized_keys2
> 
> Code:
> CoInitialize(NULL);
> IwodSSHComPtr pSshCom;
> HRESULT HR = NULL;
> hr = pSshCom.CreateInstance(CLSID_wodSSHCom, NULL);
> wSshEvents* pwEvents = new wSshEvents(pSshCom);
> IKeysPtr pKeys;
> CoInitialize(NULL);
> hr = pKeys.CreateInstance(CLSID_Keys, NULL);
> pSshCom->put_Blocking(VARIANT_TRUE);
> pSshCom->PutPort(22);
> pSshCom->put_Hostname(bstrSite);
> pSshCom->put_Login(bstrUser);
> //pSshCom->put_Password(bstrPswd);
> pSshCom->PrivateKey = "C:\\Users\\builder\\.ssh\\id_rsa";
> //hr = pKeys->Load("C:\\Users\\builder\\.sshReg\\id_rsa");
> //pSshCom->PrivateKey = pKeys->GetPrivateKey(SSHKeyTypes::RSAkey);
> pSshCom->Protocol = ProtocolsEnum::SSH2;
> pSshCom->Authentication = AuthenticationsEnum::authPubkey;
> try
> {
> 	hr = pSshCom->Connect();
> }
> catch (_com_error& e)
> {
> 	DWORD errorCode = GetLastError();
> 	printf("Unable to connect: %s", e.ErrorMessage());	
> }
> e= “0x800A7540”
> or 
> const char* filename = "C:\\Users\\builder\\.ssh\\id_rsa";
> std::ifstream file(filename, std::ios::binary | std::ios::ate);
> std::streamsize size = file.tellg();
> file.seekg(0, std::ios::beg);
> BYTE* buffer = new BYTE[size];
> file.read(reinterpret_cast<char*>(buffer), size)
> std::vector<BYTE> keyBytes(buffer, buffer + size);
> 
> SAFEARRAYBOUND bound;
> bound.lLbound = 0;
> bound.cElements = keyBytes.size();
> 
> SAFEARRAY* psa = SafeArrayCreate(VT_UI1, 1, &bound);
> void* pData = nullptr;
> SafeArrayAccessData(psa, &pData);
> memcpy(pData, keyBytes.data(), keyBytes.size());
> SafeArrayUnaccessData(psa);
> 
> VARIANT varKey;
> VariantInit(&varKey);
> varKey.vt = VT_ARRAY | VT_UI1;
> varKey.parray = psa;
> hr = pSshCom->put_PrivateKey(varKey);
> pSshCom->put_Blocking(VARIANT_TRUE);
> pSshCom->PutPort(22);
> pSshCom->put_Hostname(bstrSite);
> pSshCom->put_Login(bstrUser);
> pSshCom->Protocol = ProtocolsEnum::SSH2;
> pSshCom->Authentication = AuthenticationsEnum::authPubkey;
> try
> {
> 	hr = pSshCom->Connect();
> }
> catch (_com_error& e)
> {
> 	DWORD errorCode = GetLastError();
> 	printf("Unable to connect: %s", e.ErrorMessage());	
> }
> e= “0x800A7540”

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