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(Unicode C) IMAP SSH Tunneling (Port Forwarding)Demonstrates how to setup and use an SSH tunnel for IMAP.
#include <C_CkImapW.h> #include <C_CkEmailW.h> void ChilkatSample(void) { HCkImapW imap; const wchar_t *sshHostname; int sshPort; BOOL success; int msgCount; int upperBound; int i; BOOL bUid; HCkEmailW email; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. imap = CkImapW_Create(); // The SSH hostname may be a hostname or an // IP address, such as "192.168.1.108". // The port is typically 22 (the standard port for SSH). sshHostname = L"www.mysshserver.com"; sshPort = 22; // Connect to an SSH server and establish the SSH tunnel: success = CkImapW_SshOpenTunnel(imap,sshHostname,sshPort); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Authenticate with the SSH server via a login/password // or with a public key. // This example demonstrates SSH password authentication. // Note: This is not authenticating with the IMAP server, it is // for authenticating with the SSH server, which is separate. success = CkImapW_SshAuthenticatePw(imap,L"mySshLogin",L"mySshPassword"); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // OK, the SSH tunnel is setup. The IMAP component may // be used exactly the same as usual, except all communications // are sent through the SSH tunnel. // Connect to an IMAP server via the SSH tunnel. // Because the SSH tunnel has been previously setup, // this does not establish a direct connection with the IMAP // server. It directs the SSH server to establish the connection. // In this example, the IMAP server requires SSL/TLS. The TLS connection // will be enclosed within the SSH tunnel. CkImapW_putSsl(imap,TRUE); CkImapW_putPort(imap,993); success = CkImapW_Connect(imap,L"imap.my-imap-server.com"); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Authenticate with the IMAP server via the SSH tunnel. success = CkImapW_Login(imap,L"myLogin",L"myPassword"); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Select an IMAP mailbox success = CkImapW_SelectMailbox(imap,L"Inbox"); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // How many messages in Inbox? msgCount = CkImapW_getNumMessages(imap); if (msgCount == 0) { wprintf(L"No messages found.\n"); CkImapW_Dispose(imap); return; } upperBound = 10; if (msgCount < upperBound) { upperBound = msgCount; } // Download up to the 1st 10 messages. bUid = FALSE; for (i = 1; i <= upperBound; i++) { email = CkImapW_FetchSingle(imap,i,bUid); if (CkImapW_getLastMethodSuccess(imap) == FALSE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } else { wprintf(L"%s\n",CkEmailW_ck_from(email)); wprintf(L"%s\n",CkEmailW_subject(email)); wprintf(L"----\n"); CkEmailW_Dispose(email); } } // Disconnect from the IMAP server. // The SSH tunnel remains open. success = CkImapW_Disconnect(imap); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // It is possible to re-use the existing SSH tunnel for the next connection: success = CkImapW_Connect(imap,L"imap.my-imap-server2.com"); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Review the LastErrorText to see that the connection was made via the SSH tunnel: wprintf(L"%s\n",CkImapW_lastErrorText(imap)); success = CkImapW_Disconnect(imap); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } // Finally, close the SSH tunnel. success = CkImapW_SshCloseTunnel(imap); if (success != TRUE) { wprintf(L"%s\n",CkImapW_lastErrorText(imap)); CkImapW_Dispose(imap); return; } wprintf(L"IMAP SSH tunneling example completed.\n"); CkImapW_Dispose(imap); } |
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