Brad Arant
cd5e0a9905
IMAP (RFC 3501): LOGIN through UID, previously all stubs except CAPABILITY/LOGOUT/a partial APPEND. Multi-folder support with per-folder UID/flag indexing (new MailFolder class, backed by .uidvalidity/.uidnext/ .imapindex sidecar files), ENVELOPE support (new MessageHeaders class: header parsing, address-list parsing, IMAP quoting), and shared cursor-based argument parsing (new IMAPArgs class: sequence sets, flag lists, dates, folder-name normalization, and path-traversal protection via isValidFolderName - a bare ".." folder name would otherwise resolve into a sibling user's mailbox directory). POP3 (RFC 1939): USER through QUIT, previously only CAPA. Added UIDL. POP3 handlers use cursor-based parsing throughout rather than indexed access - ZString's copy constructor doesn't copy its `list` field, and POP3's dispatch passes the request by value, so indexed access into a copy was silently reading nothing. SMTP: DMARC evaluation added to the DATA-terminator path (DKIM verification + alignment/policy, Authentication-Results header, conditional rejection matching RFC 7489 6.3's p=reject + sampled pct=). AUTH LOGIN now handles RFC 4954's optional inline initial response (e.g. Python smtplib's "AUTH LOGIN <base64>" in one line) instead of only the exact three-line form. Outbound relay now forces IPv4 (AF_INET) instead of AF_UNSPEC - this server's IPv4 has a correct PTR record and SPF coverage, its IPv6 doesn't, and Gmail was rejecting outbound mail with 550 5.7.25 as a result. Delivery pipeline: local delivery now runs the message through SpamAssassin (new SpamAssassinFilter class, speaking spamd's PROCESS protocol directly over a raw socket - fails open/delivers unscanned if spamd is unreachable) instead of a plain hardlink, since scanning can tag/modify content. BARANTMailConfig: extracted config loading into its own class. compile: (see individual file changes - build script adjustments to match the above). Deliberately excluded from this commit: barantmail.log/ barantmail-service.log (operational logs, not source - barantmail.log in particular was the runaway 55GB/12.9GB file from a busy-loop bug fixed separately in ServerCore) and barantmail.cfg (this server's own live deployment config, matching how APIServer's equivalent config also stays untracked).
123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
#ifndef __IMAPServer_h__
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# define __IMAPServer_h__
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# include "TCPServer.h"
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# include "TLSInfo.h"
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# include "Exception.h"
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# include "IMAPSession.h"
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# include "MailFileSystem.h"
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# include "__IMAP_APPEND.h"
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# include "__IMAP_AUTHENTICATE.h"
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# include "__IMAP_CAPABILITY.h"
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# include "__IMAP_CHECK.h"
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# include "__IMAP_CLOSE.h"
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# include "__IMAP_COPY.h"
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# include "__IMAP_CREATE.h"
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# include "__IMAP_DELETE.h"
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# include "__IMAP_EXAMINE.h"
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# include "__IMAP_EXPUNGE.h"
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# include "__IMAP_FETCH.h"
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# include "__IMAP_LIST.h"
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# include "__IMAP_LOGIN.h"
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# include "__IMAP_LOGOUT.h"
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# include "__IMAP_LSUB.h"
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# include "__IMAP_NOOP.h"
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# include "__IMAP_RENAME.h"
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# include "__IMAP_SEARCH.h"
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# include "__IMAP_SELECT.h"
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# include "__IMAP_STARTTLS.h"
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# include "__IMAP_STATUS.h"
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# include "__IMAP_STORE.h"
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# include "__IMAP_SUBSCRIBE.h"
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# include "__IMAP_UID.h"
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# include "__IMAP_UNSUBSCRIBE.h"
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namespace mail {
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class IMAPServer : public core::TCPServer {
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public:
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IMAPServer(core::EPoll &epoll, std::string hostName, MailFileSystem &mailFileSystem,
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core::IPAddress ipAddress, core::TLSInfo *tlsInfo)
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: TCPServer(epoll, ipAddress, tlsInfo, " ", 10, "IMAP Server"), mailFileSystem(mailFileSystem), hostName(hostName) {
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commands.add(_imap_append, "APPEND");
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// Was registered as "AUTHENTCATE" (missing the I) - no
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// correctly-spelled client request could ever match it.
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commands.add(_imap_authenticate, "AUTHENTICATE");
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// RFC 3501 6.1.1/6.1.2/6.1.3: CAPABILITY, NOOP, and LOGOUT MUST
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// be supported in every connection state - none of the three
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// were registered at all before.
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commands.add(_imap_capability, "CAPABILITY");
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commands.add(_imap_check, "CHECK");
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commands.add(_imap_close, "CLOSE");
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commands.add(_imap_copy, "COPY");
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commands.add(_imap_create, "CREATE");
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commands.add(_imap_delete, "DELETE");
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// Was registered as "EXAAMINE" (double A) - same problem.
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commands.add(_imap_examine, "EXAMINE");
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commands.add(_imap_expunge, "EXPUNGE");
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commands.add(_imap_fetch, "FETCH");
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commands.add(_imap_list, "LIST");
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commands.add(_imap_login, "LOGIN");
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commands.add(_imap_logout, "LOGOUT");
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commands.add(_imap_lsub, "LSUB");
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commands.add(_imap_noop, "NOOP");
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commands.add(_imap_rename, "RENAME");
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commands.add(_imap_search, "SEARCH");
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commands.add(_imap_select, "SELECT");
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commands.add(_imap_starttls, "STARTTLS");
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commands.add(_imap_status, "STATUS");
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commands.add(_imap_store, "STORE");
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commands.add(_imap_subscribe, "SUBSCRIBE");
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commands.add(_imap_uid, "UID");
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commands.add(_imap_unsubscribe, "UNSUBSCRIBE");
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}
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MailFileSystem &mailFileSystem;
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std::string hostName;
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// Without this override, TCPServer's default getSocketAccept()
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// returns a plain TCPSession for every accepted connection, not
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// an IMAPSession - IMAPSession::onConnected() (the greeting
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// banner) then never fires, and IMAPCommand's session casts
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// ((IMAPSession &)session) reinterpret a TCPSession's memory as
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// an IMAPSession, undefined behavior the moment any handler
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// touches a member IMAPSession actually has and TCPSession
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// doesn't.
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IMAPSession *getSocketAccept(core::EPoll &ePoll) override {
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return new IMAPSession(ePoll, *this);
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}
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private:
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__IMAP_APPEND _imap_append;
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__IMAP_AUTHENTICATE _imap_authenticate;
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__IMAP_CAPABILITY _imap_capability;
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__IMAP_CHECK _imap_check;
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__IMAP_CLOSE _imap_close;
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__IMAP_COPY _imap_copy;
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__IMAP_CREATE _imap_create;
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__IMAP_DELETE _imap_delete;
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__IMAP_EXAMINE _imap_examine;
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__IMAP_EXPUNGE _imap_expunge;
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__IMAP_FETCH _imap_fetch;
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__IMAP_LIST _imap_list;
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__IMAP_LOGIN _imap_login;
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__IMAP_LOGOUT _imap_logout;
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__IMAP_LSUB _imap_lsub;
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__IMAP_NOOP _imap_noop;
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__IMAP_RENAME _imap_rename;
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__IMAP_SEARCH _imap_search;
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__IMAP_SELECT _imap_select;
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__IMAP_STARTTLS _imap_starttls;
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__IMAP_STATUS _imap_status;
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__IMAP_STORE _imap_store;
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__IMAP_SUBSCRIBE _imap_subscribe;
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__IMAP_UID _imap_uid;
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__IMAP_UNSUBSCRIBE _imap_unsubscribe;
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};
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}
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#endif
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