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POP3Utils.cpp
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POP3Utils.cpp
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/*
* XMail by Davide Libenzi (Intranet and Internet mail server)
* Copyright (C) 1999,..,2010 Davide Libenzi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Davide Libenzi <[email protected]>
*
*/
#include "SysInclude.h"
#include "SysDep.h"
#include "SvrDefines.h"
#include "ShBlocks.h"
#include "ResLocks.h"
#include "StrUtils.h"
#include "SList.h"
#include "BuffSock.h"
#include "Hash.h"
#include "SSLBind.h"
#include "SSLConfig.h"
#include "MD5.h"
#include "MailConfig.h"
#include "UsrUtils.h"
#include "SvrUtils.h"
#include "MessQueue.h"
#include "SMAILUtils.h"
#include "QueueUtils.h"
#include "MiscUtils.h"
#include "Maildir.h"
#include "POP3Svr.h"
#include "POP3GwLink.h"
#include "POP3Utils.h"
#include "SMTPUtils.h"
#include "MailSvr.h"
#define UPOP_IPMAP_FILE "pop3.ipmap.tab"
#define POP3_IP_LOGFILE ".ipconn"
#define POPF_MSG_DELETED (1 << 0)
#define POPF_MSG_SENT (1 << 1)
#define POPF_MSG_TOP (1 << 2)
#define POPCHF_USE_APOP (1 << 0)
#define POPCHF_FORCE_APOP (1 << 1)
#define POPCHF_USE_STLS (1 << 2)
#define POPCHF_FORCE_STLS (1 << 3)
#define POPCHF_USE_POP3S (1 << 4)
#define POPCHF_LEAVE_MSGS (1 << 5)
#define STD_POP3_TIMEOUT STD_SERVER_TIMEOUT
struct POP3ChannelCfg {
unsigned long ulFlags;
char *pszIFace;
};
struct POP3SyncMsg {
SysListHead LLnk;
HashNode HN;
int iMsgSeq;
char *pszMsgID;
SYS_OFF_T llSize;
};
struct POP3SyncChannel {
char *pszRmtServer;
char *pszRmtName;
POP3ChannelCfg ChCfg;
BSOCK_HANDLE hBSock;
int iMsgCount;
SYS_OFF_T llMailboxSize;
int iMsgSync;
SYS_OFF_T llSizeSync;
POP3SyncMsg **ppSMsg;
SysListHead SyncMList;
SysListHead SeenMList;
};
struct POP3MsgData {
SysListHead LLnk;
char szMsgName[SYS_MAX_PATH];
SYS_OFF_T llMsgSize;
unsigned long ulFlags;
};
struct POP3SessionData {
SYS_INET_ADDR PeerInfo;
UserInfo *pUI;
SysListHead MessageList;
POP3MsgData **ppMsgArray;
int iMsgListed;
int iMsgCount;
SYS_OFF_T llMBSize;
int iLastAccessed;
int iTimeout;
};
static int UPopBuildMessageList(UserInfo *pUI, SysListHead *pMsgList,
int *piMsgCount = NULL, SYS_OFF_T *pllMBSize = NULL);
static int UPopCheckResponse(char const *pszResponse, char *pszMessage = NULL);
static int UPopCloseChannel(BSOCK_HANDLE hBSock, int iHardClose = 0);
static int UPopMailFileNameFilter(char const *pszFileName)
{
return *pszFileName != '.' ? 1: 0;
}
int UPopGetMailboxSize(UserInfo *pUI, SYS_OFF_T &llMBSize, unsigned long &ulNumMessages)
{
char szMBPath[SYS_MAX_PATH];
UsrGetMailboxPath(pUI, szMBPath, sizeof(szMBPath), 0);
char szResLock[SYS_MAX_PATH];
RLCK_HANDLE hResLock = RLckLockSH(CfgGetBasedPath(szMBPath, szResLock,
sizeof(szResLock)));
if (hResLock == INVALID_RLCK_HANDLE)
return ErrGetErrorCode();
llMBSize = 0;
ulNumMessages = 0;
if (MscGetDirectorySize(szMBPath, true, llMBSize, ulNumMessages,
UPopMailFileNameFilter) < 0) {
ErrorPush();
RLckUnlockSH(hResLock);
return ErrorPop();
}
RLckUnlockSH(hResLock);
return 0;
}
int UPopCheckMailboxSize(UserInfo *pUI, SYS_OFF_T *pllAvailSpace)
{
SYS_OFF_T llMBSize = 0, llProbeSize = (pllAvailSpace != NULL) ? *pllAvailSpace: 0;
unsigned long ulNumMessages = 0;
char *pszMaxMBSize;
if (UPopGetMailboxSize(pUI, llMBSize, ulNumMessages) < 0)
return ErrGetErrorCode();
if ((pszMaxMBSize = UsrGetUserInfoVar(pUI, "MaxMBSize")) != NULL) {
SYS_OFF_T llMaxMBSize = Sys_atoi64(pszMaxMBSize) * 1024;
SysFree(pszMaxMBSize);
if (llMaxMBSize != 0 && (llMBSize + llProbeSize >= llMaxMBSize)) {
ErrSetErrorCode(ERR_MAILBOX_SIZE);
return ERR_MAILBOX_SIZE;
}
if (pllAvailSpace != NULL)
*pllAvailSpace = (llMaxMBSize != 0 ? llMaxMBSize - llMBSize:
MaxSignedType(SYS_OFF_T));
} else if (pllAvailSpace != NULL)
*pllAvailSpace = MaxSignedType(SYS_OFF_T);
return 0;
}
static int UPopFillMessageList(char const *pszBasePath, char const *pszSubPath,
SysListHead *pMsgList, int &iMsgCount, SYS_OFF_T &llMBSize)
{
SYS_HANDLE hFind;
char szScanPath[SYS_MAX_PATH], szFileName[SYS_MAX_PATH];
if (pszSubPath == NULL)
StrSNCpy(szScanPath, pszBasePath);
else
SysSNPrintf(szScanPath, sizeof(szScanPath) - 1, "%s" SYS_SLASH_STR "%s",
pszBasePath, pszSubPath);
if ((hFind = SysFirstFile(szScanPath, szFileName,
sizeof(szFileName))) != SYS_INVALID_HANDLE) {
do {
POP3MsgData *pPOPMD;
if (SysIsDirectory(hFind) ||
!UPopMailFileNameFilter(szFileName))
continue;
if ((pPOPMD = (POP3MsgData *)
SysAlloc(sizeof(POP3MsgData))) == NULL) {
ErrorPush();
SysFindClose(hFind);
return ErrorPop();
}
if (pszSubPath == NULL)
StrSNCpy(pPOPMD->szMsgName, szFileName);
else
SysSNPrintf(pPOPMD->szMsgName, sizeof(pPOPMD->szMsgName) - 1,
"%s" SYS_SLASH_STR "%s", pszSubPath, szFileName);
pPOPMD->llMsgSize = SysGetSize(hFind);
pPOPMD->ulFlags = 0;
/* Insert entry in message list */
SYS_LIST_ADDT(&pPOPMD->LLnk, pMsgList);
/* Update mailbox information */
llMBSize += pPOPMD->llMsgSize;
++iMsgCount;
} while (SysNextFile(hFind, szFileName, sizeof(szFileName)));
SysFindClose(hFind);
}
return 0;
}
static void UPopFreeMsgData(POP3MsgData *pPOPMD)
{
SysFree(pPOPMD);
}
static void UPopFreeMessageList(SysListHead *pMsgList)
{
SysListHead *pPos;
POP3MsgData *pPOPMD;
while ((pPos = SYS_LIST_FIRST(pMsgList)) != NULL) {
pPOPMD = SYS_LIST_ENTRY(pPos, POP3MsgData, LLnk);
SYS_LIST_DEL(pPos);
UPopFreeMsgData(pPOPMD);
}
}
static int UPopBuildMessageList(UserInfo *pUI, SysListHead *pMsgList,
int *piMsgCount, SYS_OFF_T *pllMBSize)
{
char szMBPath[SYS_MAX_PATH];
UsrGetMailboxPath(pUI, szMBPath, sizeof(szMBPath), 0);
char szResLock[SYS_MAX_PATH];
RLCK_HANDLE hResLock = RLckLockEX(CfgGetBasedPath(szMBPath, szResLock,
sizeof(szResLock)));
if (hResLock == INVALID_RLCK_HANDLE)
return ErrGetErrorCode();
SYS_INIT_LIST_HEAD(pMsgList);
int iMsgCount = 0;
SYS_OFF_T llMBSize = 0;
if (iMailboxType == XMAIL_MAILBOX) {
if (UPopFillMessageList(szMBPath, NULL, pMsgList, iMsgCount,
llMBSize) < 0) {
ErrorPush();
UPopFreeMessageList(pMsgList);
RLckUnlockEX(hResLock);
return ErrorPop();
}
} else {
int iScanCur = UsrGetUserInfoVarInt(pUI, "Pop3ScanCur", 0);
if (UPopFillMessageList(szMBPath, "new", pMsgList, iMsgCount,
llMBSize) < 0 ||
(iScanCur > 0 &&
UPopFillMessageList(szMBPath, "cur", pMsgList, iMsgCount,
llMBSize) < 0)) {
ErrorPush();
UPopFreeMessageList(pMsgList);
RLckUnlockEX(hResLock);
return ErrorPop();
}
}
RLckUnlockEX(hResLock);
if (piMsgCount != NULL)
*piMsgCount = iMsgCount;
if (pllMBSize != NULL)
*pllMBSize = llMBSize;
return 0;
}
static SYS_OFF_T UPopMessagesSize(SysListHead *pMsgList)
{
SYS_OFF_T llMBSize = 0;
SysListHead *pPos;
POP3MsgData *pPOPMD;
SYS_LIST_FOR_EACH(pPos, pMsgList) {
pPOPMD = SYS_LIST_ENTRY(pPos, POP3MsgData, LLnk);
llMBSize += pPOPMD->llMsgSize;
}
return llMBSize;
}
static POP3MsgData *UPopMessageFromIndex(POP3SessionData *pPOPSD, int iMsgIndex)
{
return (iMsgIndex >= 0 && iMsgIndex < pPOPSD->iMsgListed) ?
pPOPSD->ppMsgArray[iMsgIndex]: NULL;
}
int UPopAuthenticateAPOP(char const *pszDomain, char const *pszUsrName,
char const *pszTimeStamp, char const *pszDigest)
{
UserInfo *pUI = UsrGetUserByName(pszDomain, pszUsrName);
if (pUI == NULL)
return ErrGetErrorCode();
int iAuthResult = MscMD5Authenticate(pUI->pszPassword, pszTimeStamp,
pszDigest);
UsrFreeUserInfo(pUI);
return iAuthResult;
}
static int UPopCheckPeerIP(UserInfo *pUI, SYS_INET_ADDR const &PeerInfo)
{
char szIPMapFile[SYS_MAX_PATH];
UsrGetUserPath(pUI, szIPMapFile, sizeof(szIPMapFile), 1);
StrNCat(szIPMapFile, UPOP_IPMAP_FILE, sizeof(szIPMapFile));
if (SysExistFile(szIPMapFile) && MscCheckAllowedIP(szIPMapFile, PeerInfo,
true) < 0)
return ErrGetErrorCode();
return 0;
}
POP3_HANDLE UPopBuildSession(char const *pszDomain, char const *pszUsrName,
char const *pszUsrPass, SYS_INET_ADDR const *pPeerInfo)
{
UserInfo *pUI;
POP3SessionData *pPOPSD;
if ((pUI = UsrGetUserByName(pszDomain, pszUsrName)) == NULL)
return INVALID_POP3_HANDLE;
/* Check if the account is enabled for POP3 sessions */
if (!UsrGetUserInfoVarInt(pUI, "PopEnable", 1)) {
UsrFreeUserInfo(pUI);
ErrSetErrorCode(ERR_USER_DISABLED);
return INVALID_POP3_HANDLE;
}
/* Check if peer is allowed to connect from its IP */
if (pPeerInfo != NULL && UPopCheckPeerIP(pUI, *pPeerInfo) < 0) {
UsrFreeUserInfo(pUI);
return INVALID_POP3_HANDLE;
}
if (pszUsrPass != NULL && strcmp(pszUsrPass, pUI->pszPassword) != 0) {
UsrFreeUserInfo(pUI);
ErrSetErrorCode(ERR_INVALID_PASSWORD);
return INVALID_POP3_HANDLE;
}
if (UsrPOP3Lock(pUI) < 0) {
UsrFreeUserInfo(pUI);
return INVALID_POP3_HANDLE;
}
if ((pPOPSD = (POP3SessionData *) SysAlloc(sizeof(POP3SessionData))) == NULL) {
UsrPOP3Unlock(pUI);
UsrFreeUserInfo(pUI);
return INVALID_POP3_HANDLE;
}
pPOPSD->PeerInfo = *pPeerInfo;
pPOPSD->pUI = pUI;
pPOPSD->iLastAccessed = 0;
pPOPSD->iTimeout = STD_POP3_TIMEOUT;
if (UPopBuildMessageList(pUI, &pPOPSD->MessageList, &pPOPSD->iMsgCount,
&pPOPSD->llMBSize) < 0) {
SysFree(pPOPSD);
UsrPOP3Unlock(pUI);
UsrFreeUserInfo(pUI);
return INVALID_POP3_HANDLE;
}
pPOPSD->iMsgListed = pPOPSD->iMsgCount;
/* Build lookup array */
if ((pPOPSD->ppMsgArray = (POP3MsgData **)
SysAlloc((pPOPSD->iMsgCount + 1) * sizeof(POP3MsgData *))) == NULL) {
UPopFreeMessageList(&pPOPSD->MessageList);
SysFree(pPOPSD);
UsrPOP3Unlock(pUI);
UsrFreeUserInfo(pUI);
return INVALID_POP3_HANDLE;
}
int i = 0;
SysListHead *pPos;
POP3MsgData *pPOPMD;
SYS_LIST_FOR_EACH(pPos, &pPOPSD->MessageList) {
pPOPMD = SYS_LIST_ENTRY(pPos, POP3MsgData, LLnk);
pPOPSD->ppMsgArray[i++] = pPOPMD;
}
return (POP3_HANDLE) pPOPSD;
}
static int UPopUpdateMailbox(POP3SessionData *pPOPSD)
{
SysListHead *pPos;
POP3MsgData *pPOPMD;
char szMBPath[SYS_MAX_PATH];
UsrGetMailboxPath(pPOPSD->pUI, szMBPath, sizeof(szMBPath), 0);
char szResLock[SYS_MAX_PATH];
RLCK_HANDLE hResLock = RLckLockEX(CfgGetBasedPath(szMBPath, szResLock,
sizeof(szResLock)));
if (hResLock == INVALID_RLCK_HANDLE)
return ErrGetErrorCode();
SYS_LIST_FOR_EACH(pPos, &pPOPSD->MessageList) {
pPOPMD = SYS_LIST_ENTRY(pPos, POP3MsgData, LLnk);
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
char szMsgPath[SYS_MAX_PATH];
SysSNPrintf(szMsgPath, sizeof(szMsgPath) - 1, "%s" SYS_SLASH_STR "%s",
szMBPath, pPOPMD->szMsgName);
SysRemove(szMsgPath);
}
}
RLckUnlockEX(hResLock);
return 0;
}
void UPopReleaseSession(POP3_HANDLE hPOPSession, int iUpdate)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
if (iUpdate)
UPopUpdateMailbox(pPOPSD);
UsrPOP3Unlock(pPOPSD->pUI);
UsrFreeUserInfo(pPOPSD->pUI);
UPopFreeMessageList(&pPOPSD->MessageList);
SysFree(pPOPSD->ppMsgArray);
SysFree(pPOPSD);
}
char *UPopGetUserInfoVar(POP3_HANDLE hPOPSession, char const *pszName,
char const *pszDefault)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
return UsrGetUserInfoVar(pPOPSD->pUI, pszName, pszDefault);
}
int UPopGetSessionMsgCurrent(POP3_HANDLE hPOPSession)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
return pPOPSD->iMsgCount;
}
int UPopGetSessionMsgTotal(POP3_HANDLE hPOPSession)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
return pPOPSD->iMsgListed;
}
SYS_OFF_T UPopGetSessionMBSize(POP3_HANDLE hPOPSession)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
return pPOPSD->llMBSize;
}
int UPopGetSessionLastAccessed(POP3_HANDLE hPOPSession)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
return pPOPSD->iLastAccessed;
}
int UPopGetMessageSize(POP3_HANDLE hPOPSession, int iMsgIndex,
SYS_OFF_T &llMessageSize)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
POP3MsgData *pPOPMD;
llMessageSize = 0;
if ((pPOPMD = UPopMessageFromIndex(pPOPSD, iMsgIndex - 1)) == NULL) {
ErrSetErrorCode(ERR_MSG_NOT_IN_RANGE);
return ERR_MSG_NOT_IN_RANGE;
}
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
ErrSetErrorCode(ERR_MSG_DELETED);
return ERR_MSG_DELETED;
}
llMessageSize = pPOPMD->llMsgSize;
return 0;
}
int UPopGetMessageUIDL(POP3_HANDLE hPOPSession, int iMsgIndex, char *pszMessageUIDL,
int iSize)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
POP3MsgData *pPOPMD;
char const *pszFileName;
if ((pPOPMD = UPopMessageFromIndex(pPOPSD, iMsgIndex - 1)) == NULL) {
ErrSetErrorCode(ERR_MSG_NOT_IN_RANGE);
return ERR_MSG_NOT_IN_RANGE;
}
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
ErrSetErrorCode(ERR_MSG_DELETED);
return ERR_MSG_DELETED;
}
/* Extract message UIDL from mailbox file path */
if ((pszFileName = strrchr(pPOPMD->szMsgName, SYS_SLASH_CHAR)) != NULL)
pszFileName++;
else
pszFileName = pPOPMD->szMsgName;
StrNCpy(pszMessageUIDL, pszFileName, iSize);
return 0;
}
int UPopDeleteMessage(POP3_HANDLE hPOPSession, int iMsgIndex)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
POP3MsgData *pPOPMD;
if ((pPOPMD = UPopMessageFromIndex(pPOPSD, iMsgIndex - 1)) == NULL) {
ErrSetErrorCode(ERR_MSG_NOT_IN_RANGE);
return ERR_MSG_NOT_IN_RANGE;
}
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
ErrSetErrorCode(ERR_MSG_DELETED);
return ERR_MSG_DELETED;
}
pPOPSD->llMBSize -= pPOPMD->llMsgSize;
--pPOPSD->iMsgCount;
pPOPMD->ulFlags |= POPF_MSG_DELETED;
pPOPSD->iLastAccessed = iMsgIndex;
return 0;
}
int UPopResetSession(POP3_HANDLE hPOPSession)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
SysListHead *pPos;
POP3MsgData *pPOPMD;
SYS_LIST_FOR_EACH(pPos, &pPOPSD->MessageList) {
pPOPMD = SYS_LIST_ENTRY(pPos, POP3MsgData, LLnk);
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
pPOPSD->llMBSize += pPOPMD->llMsgSize;
++pPOPSD->iMsgCount;
pPOPMD->ulFlags &= ~(POPF_MSG_DELETED | POPF_MSG_SENT | POPF_MSG_TOP);
}
}
pPOPSD->iLastAccessed = 0;
return 0;
}
int UPopSendErrorResponse(BSOCK_HANDLE hBSock, int iErrorCode, int iTimeout)
{
char const *pszError = ErrGetErrorString(iErrorCode);
char *pszPOP3Error = (char *) SysAlloc(strlen(pszError) + 8);
if (pszPOP3Error == NULL)
return ErrGetErrorCode();
sprintf(pszPOP3Error, "-ERR %s", pszError);
if (BSckSendString(hBSock, pszPOP3Error, iTimeout) < 0) {
SysFree(pszPOP3Error);
return ErrGetErrorCode();
}
SysFree(pszPOP3Error);
return 0;
}
static int UPopSendMessageFile(BSOCK_HANDLE hBSock, char const *pszFilePath,
int iTimeout)
{
/*
* Send the message file to the remote POP3 client. If we are
* running on an OS with CRLF line termination, we can send the
* message as it is (since RFC wants it with CRLF).
* In the other case, we need to send by transforming LF to CRLF.
*/
#ifdef SYS_CRLF_EOL
return BSckSendFile(hBSock, pszFilePath, 0, -1, iTimeout);
#else
return MscSendFileCRLF(pszFilePath, hBSock, iTimeout);
#endif
}
int UPopSessionSendMsg(POP3_HANDLE hPOPSession, int iMsgIndex, BSOCK_HANDLE hBSock)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
POP3MsgData *pPOPMD;
char szMsgFilePath[SYS_MAX_PATH], szResponse[256];
if ((pPOPMD = UPopMessageFromIndex(pPOPSD, iMsgIndex - 1)) == NULL) {
UPopSendErrorResponse(hBSock, ERR_MSG_NOT_IN_RANGE, pPOPSD->iTimeout);
ErrSetErrorCode(ERR_MSG_NOT_IN_RANGE);
return ERR_MSG_NOT_IN_RANGE;
}
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
UPopSendErrorResponse(hBSock, ERR_MSG_DELETED, pPOPSD->iTimeout);
ErrSetErrorCode(ERR_MSG_DELETED);
return ERR_MSG_DELETED;
}
UsrGetMailboxPath(pPOPSD->pUI, szMsgFilePath, sizeof(szMsgFilePath), 1);
StrNCat(szMsgFilePath, pPOPMD->szMsgName, sizeof(szMsgFilePath));
SysSNPrintf(szResponse, sizeof(szResponse) - 1,
"+OK " SYS_OFFT_FMT " bytes", pPOPMD->llMsgSize);
if (BSckSendString(hBSock, szResponse, pPOPSD->iTimeout) < 0)
return ErrGetErrorCode();
if (pPOPMD->llMsgSize > 0 &&
UPopSendMessageFile(hBSock, szMsgFilePath, pPOPSD->iTimeout) < 0)
return ErrGetErrorCode();
if (BSckSendString(hBSock, ".", pPOPSD->iTimeout) < 0)
return ErrGetErrorCode();
pPOPSD->iLastAccessed = iMsgIndex;
pPOPMD->ulFlags |= POPF_MSG_SENT;
return 0;
}
int UPopSessionTopMsg(POP3_HANDLE hPOPSession, int iMsgIndex, int iNumLines,
BSOCK_HANDLE hBSock)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
POP3MsgData *pPOPMD;
FILE *pMsgFile;
char szMsgFilePath[SYS_MAX_PATH], szResponse[256];
if ((pPOPMD = UPopMessageFromIndex(pPOPSD, iMsgIndex - 1)) == NULL) {
UPopSendErrorResponse(hBSock, ERR_MSG_NOT_IN_RANGE, pPOPSD->iTimeout);
ErrSetErrorCode(ERR_MSG_NOT_IN_RANGE);
return ERR_MSG_NOT_IN_RANGE;
}
if (pPOPMD->ulFlags & POPF_MSG_DELETED) {
UPopSendErrorResponse(hBSock, ERR_MSG_DELETED, pPOPSD->iTimeout);
ErrSetErrorCode(ERR_MSG_DELETED);
return ERR_MSG_DELETED;
}
UsrGetMailboxPath(pPOPSD->pUI, szMsgFilePath, sizeof(szMsgFilePath), 1);
StrNCat(szMsgFilePath, pPOPMD->szMsgName, sizeof(szMsgFilePath));
if ((pMsgFile = fopen(szMsgFilePath, "rb")) == NULL) {
UPopSendErrorResponse(hBSock, ERR_FILE_OPEN, pPOPSD->iTimeout);
ErrSetErrorCode(ERR_FILE_OPEN);
return ERR_FILE_OPEN;
}
SysSNPrintf(szResponse, sizeof(szResponse) - 1,
"+OK message is " SYS_OFFT_FMT " bytes", pPOPMD->llMsgSize);
if (BSckSendString(hBSock, szResponse, pPOPSD->iTimeout) < 0) {
fclose(pMsgFile);
return ErrGetErrorCode();
}
bool bSendingMsg = false;
char szMsgLine[2048];
while (MscGetString(pMsgFile, szMsgLine, sizeof(szMsgLine) - 1) != NULL) {
if (bSendingMsg && --iNumLines < 0)
break;
if (BSckSendString(hBSock, szMsgLine, pPOPSD->iTimeout) < 0) {
fclose(pMsgFile);
return ErrGetErrorCode();
}
if (!bSendingMsg && strlen(szMsgLine) == 0)
bSendingMsg = true;
if (SvrInShutdown()) {
fclose(pMsgFile);
ErrSetErrorCode(ERR_SERVER_SHUTDOWN);
return ERR_SERVER_SHUTDOWN;
}
}
fclose(pMsgFile);
if (BSckSendString(hBSock, ".", pPOPSD->iTimeout) < 0)
return ErrGetErrorCode();
pPOPSD->iLastAccessed = iMsgIndex;
pPOPMD->ulFlags |= POPF_MSG_TOP;
return 0;
}
static int UPopGetIpLogFilePath(UserInfo *pUI, char *pszFilePath, int iMaxPath)
{
UsrGetUserPath(pUI, pszFilePath, iMaxPath, 1);
StrNCat(pszFilePath, POP3_IP_LOGFILE, iMaxPath);
return 0;
}
int UPopSaveUserIP(POP3_HANDLE hPOPSession)
{
POP3SessionData *pPOPSD = (POP3SessionData *) hPOPSession;
char szIpFilePath[SYS_MAX_PATH];
UPopGetIpLogFilePath(pPOPSD->pUI, szIpFilePath, sizeof(szIpFilePath));
char szIP[128] = "???.???.???.???";
SysInetNToA(pPOPSD->PeerInfo, szIP, sizeof(szIP));
FILE *pIpFile = fopen(szIpFilePath, "wt");
if (pIpFile == NULL) {
ErrSetErrorCode(ERR_FILE_CREATE, szIpFilePath);
return ERR_FILE_CREATE;
}
fprintf(pIpFile, "%s\n", szIP);
fclose(pIpFile);
return 0;
}
static int UPopCheckResponse(char const *pszResponse, char *pszMessage)
{
if (strnicmp(pszResponse, "+OK", 3) == 0) {
if (pszMessage != NULL)
strcpy(pszMessage, pszResponse + ((pszResponse[3] == ' ') ? 4: 3));
return 0;
} else if (strnicmp(pszResponse, "-ERR", 4) == 0) {
if (pszMessage != NULL)
strcpy(pszMessage, pszResponse + ((pszResponse[4] == ' ') ? 5: 4));
ErrSetErrorCode(ERR_BAD_SERVER_RESPONSE, pszResponse);
return ERR_BAD_SERVER_RESPONSE;
}
ErrSetErrorCode(ERR_INVALID_POP3_RESPONSE, pszResponse);
return ERR_INVALID_POP3_RESPONSE;
}
static int UPopGetResponse(BSOCK_HANDLE hBSock, char *pszResponse, int iMaxChars,
int iTimeout)
{
if (BSckGetString(hBSock, pszResponse, iMaxChars, iTimeout) == NULL)
return ErrGetErrorCode();
return UPopCheckResponse(pszResponse);
}
static char *UPopExtractServerTimeStamp(char const *pszResponse, char *pszTimeStamp,
int iMaxTimeStamp)
{
int iSize;
char const *pszStartTS, *pszEndTS;
if ((pszStartTS = strrchr(pszResponse, '<')) == NULL ||
(pszEndTS = strchr(pszStartTS + 1, '>')) == NULL)
return NULL;
iSize = (int) (pszEndTS - pszStartTS) + 1;
iSize = Min(iSize, iMaxTimeStamp - 1);
strncpy(pszTimeStamp, pszStartTS, iSize);
pszTimeStamp[iSize] = '\0';
return pszTimeStamp;
}
static int UPopSendCommand(BSOCK_HANDLE hBSock, char const *pszCommand, char *pszResponse,
int iMaxChars, int iTimeout)
{
if (BSckSendString(hBSock, pszCommand, iTimeout) <= 0)
return ErrGetErrorCode();
if (UPopGetResponse(hBSock, pszResponse, iMaxChars, iTimeout) < 0)
return ErrGetErrorCode();
return 0;
}
static int UPopDoClearTextAuth(BSOCK_HANDLE hBSock, char const *pszUsername,
char const *pszPassword, char *pszRespBuffer,
int iMaxRespChars)
{
SysSNPrintf(pszRespBuffer, iMaxRespChars - 1, "USER %s", pszUsername);
if (UPopSendCommand(hBSock, pszRespBuffer, pszRespBuffer, iMaxRespChars,
iPOP3ClientTimeout) < 0)
return ErrGetErrorCode();
SysSNPrintf(pszRespBuffer, iMaxRespChars - 1, "PASS %s", pszPassword);
if (UPopSendCommand(hBSock, pszRespBuffer, pszRespBuffer, iMaxRespChars,
iPOP3ClientTimeout) < 0)
return ErrGetErrorCode();
return 0;
}
static int UPopDoAPOPAuth(BSOCK_HANDLE hBSock, char const *pszUsername,
char const *pszPassword, char const *pszTimeStamp,
char *pszRespBuffer, int iMaxRespChars)
{
char *pszHash;
char szMD5[128];
if ((pszHash = StrSprint("%s%s", pszTimeStamp, pszPassword)) == NULL)
return ErrGetErrorCode();
do_md5_string(pszHash, strlen(pszHash), szMD5);
SysFree(pszHash);
SysSNPrintf(pszRespBuffer, iMaxRespChars - 1, "APOP %s %s", pszUsername, szMD5);
if (UPopSendCommand(hBSock, pszRespBuffer, pszRespBuffer, iMaxRespChars,
iPOP3ClientTimeout) < 0)
return ErrGetErrorCode();
return 0;
}
static int UPopSwitchToTLS(BSOCK_HANDLE hBSock, char const *pszServer,
POP3ChannelCfg const *pChCfg)
{
int iError;
SslServerBind SSLB;
SslBindEnv SslE;
if (CSslBindSetup(&SSLB) < 0)
return ErrGetErrorCode();
ZeroData(SslE);
iError = BSslBindClient(hBSock, &SSLB, MscSslEnvCB, &SslE);
CSslBindCleanup(&SSLB);
/*
* We may want to add verify code here ...
*/
SysFree(SslE.pszIssuer);
SysFree(SslE.pszSubject);
return iError;
}
static int UPopInitiateTLS(BSOCK_HANDLE hBSock, char const *pszServer, char *pszRespBuffer,
int iMaxRespChars, POP3ChannelCfg const *pChCfg)
{
SysSNPrintf(pszRespBuffer, iMaxRespChars - 1, "STLS");
if (UPopSendCommand(hBSock, pszRespBuffer, pszRespBuffer, iMaxRespChars,
iPOP3ClientTimeout) < 0)
return (pChCfg->ulFlags & POPCHF_FORCE_STLS) ? ErrGetErrorCode(): 0;
return UPopSwitchToTLS(hBSock, pszServer, pChCfg);
}
static BSOCK_HANDLE UPopCreateChannel(char const *pszServer, char const *pszUsername,
char const *pszPassword, POP3ChannelCfg const *pChCfg)
{
SYS_SOCKET SockFD;
BSOCK_HANDLE hBSock;
SYS_INET_ADDR SvrAddr;
if (MscGetServerAddress(pszServer, SvrAddr, STD_POP3_PORT) < 0)
return INVALID_BSOCK_HANDLE;
if ((SockFD = SysCreateSocket(SysGetAddrFamily(SvrAddr), SOCK_STREAM,
0)) == SYS_INVALID_SOCKET)
return INVALID_BSOCK_HANDLE;
/*
* Are we requested to bind to a specific interface to talk to this server?
*/
if (pChCfg->pszIFace != NULL) {
SYS_INET_ADDR BndAddr;
if (MscGetServerAddress(pChCfg->pszIFace, BndAddr, 0) < 0 ||
SysBindSocket(SockFD, &BndAddr) < 0) {
SysCloseSocket(SockFD);
return INVALID_BSOCK_HANDLE;
}
}
if (SysConnect(SockFD, &SvrAddr, iPOP3ClientTimeout) < 0) {
SysCloseSocket(SockFD);
return INVALID_BSOCK_HANDLE;
}
if ((hBSock = BSckAttach(SockFD)) == INVALID_BSOCK_HANDLE) {
SysCloseSocket(SockFD);
return INVALID_BSOCK_HANDLE;
}
/*
* Is this a full POP3S connection?
*/
if ((pChCfg->ulFlags & POPCHF_USE_POP3S) &&
UPopSwitchToTLS(hBSock, pszServer, pChCfg) < 0) {
SysCloseSocket(SockFD);
return INVALID_BSOCK_HANDLE;
}
/* Read welcome message */
char szRTXBuffer[2048];
if (UPopGetResponse(hBSock, szRTXBuffer, sizeof(szRTXBuffer) - 1,
iPOP3ClientTimeout) < 0) {
UPopCloseChannel(hBSock);
return INVALID_BSOCK_HANDLE;
}
/*
* Non TLS mode active and STLS required?
*/
if (strcmp(BSckBioName(hBSock), BSSL_BIO_NAME) != 0 &&
(pChCfg->ulFlags & POPCHF_USE_STLS) &&
UPopInitiateTLS(hBSock, pszServer, szRTXBuffer, sizeof(szRTXBuffer) - 1,
pChCfg) < 0) {
UPopCloseChannel(hBSock);
return INVALID_BSOCK_HANDLE;
}
/* Extract TimeStamp from server respose (if any) */
char szTimeStamp[256] = "";
if ((pChCfg->ulFlags & POPCHF_USE_APOP) == 0 ||
MscExtractServerTimeStamp(szRTXBuffer, szTimeStamp,
sizeof(szTimeStamp) - 1) == NULL) {
/* Try clear text authentication */
if (UPopDoClearTextAuth(hBSock, pszUsername, pszPassword, szRTXBuffer,
sizeof(szRTXBuffer) - 1) < 0) {
UPopCloseChannel(hBSock);
return INVALID_BSOCK_HANDLE;
}
} else {
/* Try APOP authentication first */
int iResult = UPopDoAPOPAuth(hBSock, pszUsername, pszPassword,
szTimeStamp, szRTXBuffer,
sizeof(szRTXBuffer) - 1);
if (iResult < 0) {
if (iResult != ERR_BAD_SERVER_RESPONSE ||
(pChCfg->ulFlags & POPCHF_FORCE_APOP)) {
UPopCloseChannel(hBSock);
return INVALID_BSOCK_HANDLE;
}
/* Try clear text authentication */
if (UPopDoClearTextAuth(hBSock, pszUsername, pszPassword, szRTXBuffer,
sizeof(szRTXBuffer) - 1) < 0) {
UPopCloseChannel(hBSock);
return INVALID_BSOCK_HANDLE;
}
}
}
return hBSock;
}
static int UPopCloseChannel(BSOCK_HANDLE hBSock, int iHardClose)
{
if (!iHardClose) {
char szRTXBuffer[2048];
if (UPopSendCommand(hBSock, "QUIT", szRTXBuffer, sizeof(szRTXBuffer) - 1,
iPOP3ClientTimeout) < 0) {
BSckDetach(hBSock, 1);
return ErrGetErrorCode();
}
}
BSckDetach(hBSock, 1);
return 0;
}
static int UPopGetMailboxStatus(BSOCK_HANDLE hBSock, int &iMsgCount,
SYS_OFF_T &llMailboxSize)
{
char szRTXBuffer[2048];
if (UPopSendCommand(hBSock, "STAT", szRTXBuffer, sizeof(szRTXBuffer) - 1,
iPOP3ClientTimeout) < 0)
return ErrGetErrorCode();
if (sscanf(szRTXBuffer, "+OK %d " SYS_OFFT_FMT, &iMsgCount,
&llMailboxSize) != 2) {