]> code.citadel.org Git - citadel.git/blobdiff - citadel/serv_imap.c
* Renamed "struct user" to "struct ctdluser"
[citadel.git] / citadel / serv_imap.c
index cd1ce9ecb8e1522f390ff36d94ea9f40232fc199..07c289219ad64abeea1eb17450fd15427559fd41 100644 (file)
 #include <ctype.h>
 #include <string.h>
 #include <limits.h>
+
+#ifdef HAVE_OPENSSL
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#endif
+
 #include "citadel.h"
 #include "server.h"
 #include "sysdep_decls.h"
 #include "imap_store.h"
 #include "imap_misc.h"
 
+#ifdef HAVE_OPENSSL
+#include "serv_crypto.h"
+#endif
+
 /* imap_rename() uses this struct containing list of rooms to rename */
 struct irl {
        struct irl *next;
@@ -112,7 +123,7 @@ void imap_set_seen_flags(void) {
        struct visit vbuf;
        int i;
 
-       CtdlGetRelationship(&vbuf, &CC->usersupp, &CC->quickroom);
+       CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
        if (IMAP->num_msgs > 0) {
                for (i=0; i<IMAP->num_msgs; ++i) {
                        if (is_msg_in_mset(vbuf.v_seen, IMAP->msgids[i])) {
@@ -199,7 +210,7 @@ void imap_rescan_msgids(void) {
        /* Load the *current* message list from disk, so we can compare it
         * to what we have in memory.
         */
-       cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->quickroom.QRnumber, sizeof(long));
+       cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
        if (cdbfr != NULL) {
                msglist = mallok(cdbfr->len);
                memcpy(msglist, cdbfr->ptr, cdbfr->len);
@@ -380,11 +391,68 @@ void imap_auth_login_pass(char *cmd) {
  * implements the CAPABILITY command
  */
 void imap_capability(int num_parms, char *parms[]) {
-       cprintf("* CAPABILITY IMAP4 IMAP4REV1 AUTH=LOGIN\r\n");
+       cprintf("* CAPABILITY IMAP4 IMAP4REV1 AUTH=LOGIN");
+#ifdef HAVE_OPENSSL
+       cprintf(" STARTTLS");
+#endif
+       cprintf("\r\n");
        cprintf("%s OK CAPABILITY completed\r\n", parms[0]);
 }
 
 
+/*
+ * implements the STARTTLS command
+ */
+#ifdef HAVE_OPENSSL
+void imap_starttls(int num_parms, char *parms[]) {
+       int retval, bits, alg_bits;
+
+       if (!ssl_ctx) {
+               cprintf("%s NO No SSL_CTX available\r\n", parms[0]);
+               return;
+       }
+       if (!(CC->ssl = SSL_new(ssl_ctx))) {
+               lprintf(2, "SSL_new failed: %s\n",
+                               ERR_reason_error_string(ERR_peek_error()));
+               cprintf("%s NO SSL_new: %s\r\n", parms[0],
+                               ERR_reason_error_string(ERR_get_error()));
+               return;
+       }
+       if (!(SSL_set_fd(CC->ssl, CC->client_socket))) {
+               lprintf(2, "SSL_set_fd failed: %s\n",
+                               ERR_reason_error_string(ERR_peek_error()));
+               SSL_free(CC->ssl);
+               CC->ssl = NULL;
+               cprintf("%s NO SSL_set_fd: %s\r\n", parms[0],
+                               ERR_reason_error_string(ERR_get_error()));
+               return;
+       }
+       cprintf("%s OK begin TLS negotiation now\r\n", parms[0]);
+       retval = SSL_accept(CC->ssl);
+       if (retval < 1) {
+               /*
+                * Can't notify the client of an error here; they will
+                * discover the problem at the SSL layer and should
+                * revert to unencrypted communications.
+                */
+               long errval;
+
+               errval = SSL_get_error(CC->ssl, retval);
+               lprintf(2, "SSL_accept failed: %s\n",
+                               ERR_reason_error_string(ERR_get_error()));
+               SSL_free(CC->ssl);
+               CC->ssl = NULL;
+               return;
+       }
+       BIO_set_close(CC->ssl->rbio, BIO_NOCLOSE);
+       bits = SSL_CIPHER_get_bits(SSL_get_current_cipher(CC->ssl), &alg_bits);
+       lprintf(3, "SSL/TLS using %s on %s (%d of %d bits)\n",
+                       SSL_CIPHER_get_name(SSL_get_current_cipher(CC->ssl)),
+                       SSL_CIPHER_get_version(SSL_get_current_cipher(CC->ssl)),
+                       bits, alg_bits);
+       CC->redirect_ssl = 1;
+}
+#endif
 
 
 
@@ -397,7 +465,7 @@ void imap_select(int num_parms, char *parms[]) {
        int c = 0;
        int ok = 0;
        int ra = 0;
-       struct quickroom QRscratch;
+       struct ctdlroom QRscratch;
        int msgs, new;
        int floornum;
        int roomflags;
@@ -419,7 +487,7 @@ void imap_select(int num_parms, char *parms[]) {
         /* Then try a mailbox name match */
         if (c != 0) {
                 MailboxName(augmented_roomname, sizeof augmented_roomname,
-                           &CC->usersupp, towhere);
+                           &CC->user, towhere);
                 c = getroom(&QRscratch, augmented_roomname);
                 if (c == 0)
                         strcpy(towhere, augmented_roomname);
@@ -428,7 +496,7 @@ void imap_select(int num_parms, char *parms[]) {
        /* If the room exists, check security/access */
         if (c == 0) {
                 /* See if there is an existing user/room relationship */
-                ra = CtdlRoomAccess(&QRscratch, &CC->usersupp);
+                ra = CtdlRoomAccess(&QRscratch, &CC->user);
 
                 /* normal clients have to pass through security */
                 if (ra & UA_KNOWN) {
@@ -448,7 +516,7 @@ void imap_select(int num_parms, char *parms[]) {
         * usergoto() formally takes us to the desired room, happily returning
         * the number of messages and number of new messages.
         */
-       memcpy(&CC->quickroom, &QRscratch, sizeof(struct quickroom));
+       memcpy(&CC->room, &QRscratch, sizeof(struct ctdlroom));
        usergoto(NULL, 0, 0, &msgs, &new);
        IMAP->selected = 1;
 
@@ -484,7 +552,7 @@ int imap_do_expunge(void) {
 
        if (IMAP->num_msgs > 0) for (i=0; i<IMAP->num_msgs; ++i) {
                if (IMAP->flags[i] & IMAP_DELETED) {
-                       CtdlDeleteMessages(CC->quickroom.QRname,
+                       CtdlDeleteMessages(CC->room.QRname,
                                        IMAP->msgids[i], "");
                        ++num_expunged;
                        lprintf(9, "%ld ... deleted\n", IMAP->msgids[i]);
@@ -557,7 +625,7 @@ void imap_list_floors(char *cmd, char *pattern) {
  * IMAP "subscribed folder" is equivocated to Citadel "known rooms."  This
  * may or may not be the desired behavior in the future.
  */
-void imap_lsub_listroom(struct quickroom *qrbuf, void *data) {
+void imap_lsub_listroom(struct ctdlroom *qrbuf, void *data) {
        char buf[SIZ];
        int ra;
        char *pattern;
@@ -565,7 +633,7 @@ void imap_lsub_listroom(struct quickroom *qrbuf, void *data) {
        pattern = (char *)data;
 
        /* Only list rooms to which the user has access!! */
-       ra = CtdlRoomAccess(qrbuf, &CC->usersupp);
+       ra = CtdlRoomAccess(qrbuf, &CC->user);
        if (ra & UA_KNOWN) {
                imap_mailboxname(buf, sizeof buf, qrbuf);
                if (imap_mailbox_matches_pattern(pattern, buf)) {
@@ -605,7 +673,7 @@ void imap_lsub(int num_parms, char *parms[]) {
 /*
  * Back end for imap_list()
  */
-void imap_list_listroom(struct quickroom *qrbuf, void *data) {
+void imap_list_listroom(struct ctdlroom *qrbuf, void *data) {
        char buf[SIZ];
        int ra;
        char *pattern;
@@ -613,7 +681,7 @@ void imap_list_listroom(struct quickroom *qrbuf, void *data) {
        pattern = (char *)data;
 
        /* Only list rooms to which the user has access!! */
-       ra = CtdlRoomAccess(qrbuf, &CC->usersupp);
+       ra = CtdlRoomAccess(qrbuf, &CC->user);
        if ( (ra & UA_KNOWN) 
          || ((ra & UA_GOTOALLOWED) && (ra & UA_ZAPPED))) {
                imap_mailboxname(buf, sizeof buf, qrbuf);
@@ -662,6 +730,11 @@ void imap_create(int num_parms, char *parms[]) {
        int flags;
        int newroomtype;
 
+       if (strchr(parms[2], '\\') != NULL) {
+               cprintf("%s NO Invalid character in folder name\r\n", parms[0]);
+               return;
+       }
+
        ret = imap_roomname(roomname, sizeof roomname, parms[2]);
        if (ret < 0) {
                cprintf("%s NO Invalid mailbox name or location\r\n",
@@ -700,7 +773,7 @@ int imap_grabroom(char *returned_roomname, char *foldername) {
        char augmented_roomname[ROOMNAMELEN];
        char roomname[ROOMNAMELEN];
        int c;
-       struct quickroom QRscratch;
+       struct ctdlroom QRscratch;
        int ra;
        int ok = 0;
 
@@ -715,7 +788,7 @@ int imap_grabroom(char *returned_roomname, char *foldername) {
         /* Then try a mailbox name match */
         if (c != 0) {
                 MailboxName(augmented_roomname, sizeof augmented_roomname,
-                           &CC->usersupp, roomname);
+                           &CC->user, roomname);
                 c = getroom(&QRscratch, augmented_roomname);
                 if (c == 0)
                         strcpy(roomname, augmented_roomname);
@@ -724,7 +797,7 @@ int imap_grabroom(char *returned_roomname, char *foldername) {
        /* If the room exists, check security/access */
         if (c == 0) {
                 /* See if there is an existing user/room relationship */
-                ra = CtdlRoomAccess(&QRscratch, &CC->usersupp);
+                ra = CtdlRoomAccess(&QRscratch, &CC->user);
 
                 /* normal clients have to pass through security */
                 if (ra & UA_KNOWN) {
@@ -768,7 +841,7 @@ void imap_status(int num_parms, char *parms[]) {
         * folder is selected, save its name so we can return there!!!!!)
         */
        if (IMAP->selected) {
-               strcpy(savedroom, CC->quickroom.QRname);
+               strcpy(savedroom, CC->room.QRname);
        }
        usergoto(roomname, 0, 0, &msgs, &new);
 
@@ -778,7 +851,7 @@ void imap_status(int num_parms, char *parms[]) {
         * names and simply spew all possible data items.  It's far easier to
         * code and probably saves us some processing time too.
         */
-       imap_mailboxname(buf, sizeof buf, &CC->quickroom);
+       imap_mailboxname(buf, sizeof buf, &CC->room);
        cprintf("* STATUS ");
        imap_strout(buf);
        cprintf(" (MESSAGES %d ", msgs);
@@ -825,7 +898,7 @@ void imap_subscribe(int num_parms, char *parms[]) {
         * we're looking for.
         */
        if (IMAP->selected) {
-               strcpy(savedroom, CC->quickroom.QRname);
+               strcpy(savedroom, CC->room.QRname);
        }
        usergoto(roomname, 0, 0, &msgs, &new);
 
@@ -862,7 +935,7 @@ void imap_unsubscribe(int num_parms, char *parms[]) {
         * usergoto() formally takes us to the desired room.
         */
        if (IMAP->selected) {
-               strcpy(savedroom, CC->quickroom.QRname);
+               strcpy(savedroom, CC->room.QRname);
        }
        usergoto(roomname, 0, 0, &msgs, &new);
 
@@ -911,16 +984,16 @@ void imap_delete(int num_parms, char *parms[]) {
         * folder is selected, save its name so we can return there!!!!!)
         */
        if (IMAP->selected) {
-               strcpy(savedroom, CC->quickroom.QRname);
+               strcpy(savedroom, CC->room.QRname);
        }
        usergoto(roomname, 0, 0, &msgs, &new);
 
        /*
         * Now delete the room.
         */
-       if (CtdlDoIHavePermissionToDeleteThisRoom(&CC->quickroom)) {
+       if (CtdlDoIHavePermissionToDeleteThisRoom(&CC->room)) {
                cprintf("%s OK DELETE completed\r\n", parms[0]);
-               delete_room(&CC->quickroom);
+               delete_room(&CC->room);
        }
        else {
                cprintf("%s NO Can't delete this folder.\r\n", parms[0]);
@@ -939,7 +1012,7 @@ void imap_delete(int num_parms, char *parms[]) {
 /*
  * Back end function for imap_rename()
  */
-void imap_rename_backend(struct quickroom *qrbuf, void *data) {
+void imap_rename_backend(struct ctdlroom *qrbuf, void *data) {
        char foldername[SIZ];
        char newfoldername[SIZ];
        char newroomname[ROOMNAMELEN];
@@ -987,6 +1060,11 @@ void imap_rename(int num_parms, char *parms[]) {
        struct irl *irlp = NULL;        /* scratch pointer */
        struct irlparms irlparms;
 
+       if (strchr(parms[3], '\\') != NULL) {
+               cprintf("%s NO Invalid character in folder name\r\n", parms[0]);
+               return;
+       }
+
        oldr = imap_roomname(old_room, sizeof old_room, parms[2]);
        newr = imap_roomname(new_room, sizeof new_room, parms[3]);
        new_floor = (newr & 0xFF);
@@ -1142,6 +1220,12 @@ void imap_command_loop(void) {
                imap_capability(num_parms, parms);
        }
 
+#ifdef HAVE_OPENSSL
+       else if (!strcasecmp(parms[1], "STARTTLS")) {
+               imap_starttls(num_parms, parms);
+       }
+#endif
+
        else if (!CC->logged_in) {
                cprintf("%s BAD Not logged in.\r\n", parms[0]);
        }