164 lines
3.8 KiB
C
164 lines
3.8 KiB
C
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/*****************************************************************************
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*
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* pop3.c
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*
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* Copyright (c) 1997 Microsoft Corporation. All Rights Reserved.
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*
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* Abstract:
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*
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* Prepares for and waits for client connections.
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*
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*****************************************************************************/
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#include "msnspa.h"
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#define PROXY_PORT 110 /* I listen to this */
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#define PROXY_DEST 110 /* And talk to this */
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#define PROXY_HOST "pop3.email.msn.com" /* And I talk to him */
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#define PROTOCOL "MSN" /* with this protocol */
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BOOL CALLBACK POP3_Negotiate(SOCKET s);
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/*****************************************************************************
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*
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* PROXYINFO for POP3
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*
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*****************************************************************************/
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#pragma BEGIN_CONST_DATA
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PROXYINFO g_proxyPop = {
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PROXY_PORT, /* localport */
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PROXY_DEST, /* serverport */
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PROXY_HOST, /* remote server */
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&g_cMailUsers, /* Usage counter */
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POP3_Negotiate, /* Negotiation function */
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"-ERR Server inaccessible\r\n", /* Failed to connect */
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"-ERR Authentication failed\r\n", /* Password problem */
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"+OK MSN Secure Password Authentication Proxy\r\n", /* Generic happy */
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"USER", /* First 4-char command to ignore */
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"PASS", /* Second 4-char command to ignore */
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};
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/*****************************************************************************
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*
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* POP3_Negotiate
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*
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* Perform an authenticated MSN logon.
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*
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*****************************************************************************/
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BOOL CALLBACK
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POP3_Negotiate(SOCKET ssfd)
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{
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WIN32AUTHSTATE was;
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char buf[BUFSIZE+1];
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int cb;
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/*
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* Wait for the greeting.
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*/
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cb = recv(ssfd, buf, BUFSIZE, 0); /* read a hunk */
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#ifdef CHATTY
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if (cb >= 0) {
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buf[cb] = 0;
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Squirt("<%s\r\n", buf);
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}
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#endif
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if (cb <= 0 || buf[0] != '+') {
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return FALSE;
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}
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/*
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* Tell the server to go into authentication mode.
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*/
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sendsz(ssfd, "AUTH " PROTOCOL "\r\n");
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#ifdef CHATTY
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Squirt(">AUTH " PROTOCOL "\r\n");
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#endif
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/*
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* Wait for the Proceed.
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*/
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cb = recv(ssfd, buf, BUFSIZE, 0); /* read a hunk */
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#ifdef CHATTY
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if (cb >= 0) {
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buf[cb] = 0;
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Squirt("<%s\r\n", buf);
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}
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#endif
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if (cb <= 0 || buf[0] != '+') {
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return FALSE;
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}
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if (!Security_AcquireCredentials(&was, TEXT(PROTOCOL))) {
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Die(TEXT("Cannot acquire credentials handle"));
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}
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if (!Security_GetNegotiation(&was)) {
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Die(TEXT("Cannot get negotiation string"));
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}
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/*
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* Now send the initial cookie.
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*/
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sendsz(ssfd, was.szBuffer);
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sendsz(ssfd, "\r\n");
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#ifdef CHATTY
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Squirt(">%s\r\n", was.szBuffer);
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#endif
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/*
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* Response should be
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*
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* + <challenge>
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*/
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cb = recv(ssfd, buf, BUFSIZE, 0);
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if (cb <= 0 || buf[0] != '+') {
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return FALSE;
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}
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#ifdef CHATTY
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buf[cb] = 0;
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Squirt("<%s", buf);
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#endif
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/*
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* Parse the server response and build our response.
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*/
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if (!Security_GetResponse(&was, buf + 2)) {
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Die(TEXT("Cannot build response"));
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}
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/*
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* Now send our response.
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*/
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sendsz(ssfd, was.szBuffer);
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sendsz(ssfd, "\r\n");
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#ifdef CHATTY
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Squirt(">%s\r\n", was.szBuffer);
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#endif
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Security_ReleaseCredentials(&was);
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/*
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* Now see how that worked. Response should be
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*
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* + OK
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*/
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cb = recv(ssfd, buf, BUFSIZE, 0);
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if (cb <= 0 || buf[0] != '+') {
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return FALSE;
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}
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return TRUE;
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}
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