* Split cmd_user() and cmd_pass() into frontend/backend functions

[citadel.git] / citadel / serv_smtp.c

diff --git a/citadel/serv_smtp.c b/citadel/serv_smtp.c
index 87aef1acba845cd246834517110e0698cd65a1eb..6d03178053cd4c57ab008c00d76233f1ba303ccd 100644 (file)
--- a/citadel/serv_smtp.c
+++ b/citadel/serv_smtp.c
@@ -21,9 +21,25 @@
 #include "config.h"
 #include "dynloader.h"
 #include "room_ops.h"
+#include "user_ops.h"
 #include "policy.h"
 #include "database.h"
 #include "msgbase.h"
+#include "tools.h"
+
+struct citsmtp {
+       int command_state;
+};
+
+enum {
+       smtp_command,
+       smtp_user,
+       smtp_password
+};
+
+#define SMTP ((struct citsmtp *)CtdlGetUserData(SYM_SMTP))
+
+long SYM_SMTP;
 
 
 /*
@@ -32,12 +48,107 @@
 void smtp_greeting(void) {
 
        strcpy(CC->cs_clientname, "Citadel SMTP");
+       CtdlAllocUserData(SYM_SMTP, sizeof(struct citsmtp));
 
-       cprintf("220 %s Citadel/UX SMTP server ready\n",
+       cprintf("220 Welcome to the Citadel/UX ESMTP server at %s\n",
                config.c_fqdn);
 }
 
 
+/*
+ * Implement HELO and EHLO commands.
+ */
+void smtp_hello(char *argbuf, int is_esmtp) {
+
+       if (!is_esmtp) {
+               cprintf("250 Greetings and joyous salutations.\n");
+       }
+       else {
+               cprintf("250-Greetings and joyous salutations.\n");
+               cprintf("250-HELP\n");
+               cprintf("250-SIZE %ld\n", config.c_maxmsglen);
+               cprintf("250 AUTH=LOGIN\n");
+       }
+}
+
+
+/*
+ * Implement HELP command.
+ */
+void smtp_help(void) {
+       cprintf("214-Here's the frequency, Kenneth:\n");
+       cprintf("214-    EHLO\n");
+       cprintf("214-    HELO\n");
+       cprintf("214-    HELP\n");
+       cprintf("214-    NOOP\n");
+       cprintf("214-    QUIT\n");
+       cprintf("214 I'd tell you more, but then I'd have to kill you.\n");
+}
+
+
+/*
+ *
+ */
+void smtp_get_user(char *argbuf) {
+       char buf[256];
+       char username[256];
+
+       decode_base64(username, argbuf);
+       lprintf(9, "Trying <%s>\n", username);
+       if (CtdlLoginExistingUser(username) == login_ok) {
+               encode_base64(buf, "Password:");
+               cprintf("334 %s\n", buf);
+               SMTP->command_state = smtp_password;
+       }
+       else {
+               cprintf("500 No such user.\n");
+               SMTP->command_state = smtp_command;
+       }
+}
+
+
+/*
+ *
+ */
+void smtp_get_pass(char *argbuf) {
+       char password[256];
+
+       decode_base64(password, argbuf);
+       lprintf(9, "Trying <%s>\n", password);
+       if (CtdlTryPassword(password) == pass_ok) {
+               cprintf("235 Authentication successful.\n");
+               lprintf(9, "SMTP auth login successful\n");
+       }
+       else {
+               cprintf("500 Authentication failed.\n");
+       }
+       SMTP->command_state = smtp_command;
+}
+
+
+/*
+ *
+ */
+void smtp_auth(char *argbuf) {
+       char buf[256];
+
+       if (strncasecmp(argbuf, "login", 5) ) {
+               cprintf("500 We only support LOGIN authentication.\n");
+               return;
+       }
+
+       if (strlen(argbuf) >= 7) {
+               smtp_get_user(&argbuf[6]);
+       }
+
+       else {
+               encode_base64(buf, "Username:");
+               cprintf("334 %s\n", buf);
+               SMTP->command_state = smtp_user;
+       }
+}
+
+
 /* 
  * Main command loop for SMTP sessions.
  */
@@ -52,9 +163,38 @@ void smtp_command_loop(void) {
                return;
        }
        lprintf(5, "citserver[%3d]: %s\n", CC->cs_pid, cmdbuf);
+       while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
+
+       if (SMTP->command_state == smtp_user) {
+               smtp_get_user(cmdbuf);
+       }
+
+       else if (SMTP->command_state == smtp_password) {
+               smtp_get_pass(cmdbuf);
+       }
+
+       else if (!strncasecmp(cmdbuf, "AUTH", 4)) {
+               smtp_auth(&cmdbuf[5]);
+       }
+
+       else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
+               smtp_hello(&cmdbuf[5], 1);
+       }
+
+       else if (!strncasecmp(cmdbuf, "HELO", 4)) {
+               smtp_hello(&cmdbuf[5], 0);
+       }
+
+       else if (!strncasecmp(cmdbuf, "HELP", 4)) {
+               smtp_help();
+       }
+
+       else if (!strncasecmp(cmdbuf, "NOOP", 4)) {
+               cprintf("250 This command successfully did nothing.\n");
+       }
 
-       if (!strncasecmp(cmdbuf,"QUIT",4)) {
-               cprintf("221 Later, dude!  Microsoft sucks!!\n");
+       else if (!strncasecmp(cmdbuf, "QUIT", 4)) {
+               cprintf("221 Goodbye...\n");
                CC->kill_me = 1;
                return;
                }
@@ -69,7 +209,8 @@ void smtp_command_loop(void) {
 
 char *Dynamic_Module_Init(void)
 {
-       CtdlRegisterServiceHook(2525,
+       SYM_SMTP = CtdlGetDynamicSymbol();
+       CtdlRegisterServiceHook(25,
                                smtp_greeting,
                                smtp_command_loop);
        return "$Id$";