Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/imap-login/client-authenticate.c @ 8413:24c8bc8098ee HEAD

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Give a different error message if authentication succeeds but authorization fails. Added a new "authz" parameter for FAIL result in the auth protocol for this.
author Timo Sirainen <tss@iki.fi>
date Sat, 15 Nov 2008 21:29:59 +0200
parents 6e9100795d89
children 4693c9f72baa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
7086
7ed926ed7aa4 Updated copyright notices to include year 2008.
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1 /* Copyright (c) 2002-2008 Dovecot authors, see the included COPYING file */
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2
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3 #include "common.h"
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4 #include "base64.h"
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5 #include "buffer.h"
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6 #include "ioloop.h"
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7 #include "istream.h"
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8 #include "ostream.h"
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9 #include "safe-memset.h"
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10 #include "str.h"
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11 #include "str-sanitize.h"
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12 #include "imap-resp-code.h"
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13 #include "imap-parser.h"
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14 #include "auth-client.h"
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15 #include "client.h"
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16 #include "client-authenticate.h"
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17 #include "imap-proxy.h"
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18
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19 #include <stdlib.h>
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20
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21 #define IMAP_SERVICE_NAME "imap"
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22 #define IMAP_AUTH_FAILED_MSG "["IMAP_RESP_CODE_AUTHFAILED"] "AUTH_FAILED_MSG
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23 #define IMAP_AUTHZ_FAILED_MSG \
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24 "["IMAP_RESP_CODE_AUTHZFAILED"] Authorization failed"
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25
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26 const char *client_authenticate_get_capabilities(bool secured)
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27 {
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28 const struct auth_mech_desc *mech;
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29 unsigned int i, count;
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30 string_t *str;
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32 str = t_str_new(128);
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33 mech = auth_client_get_available_mechs(auth_client, &count);
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34 for (i = 0; i < count; i++) {
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35 /* a) transport is secured
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36 b) auth mechanism isn't plaintext
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37 c) we allow insecure authentication
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38 */
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39 if ((mech[i].flags & MECH_SEC_PRIVATE) == 0 &&
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40 (secured || !disable_plaintext_auth ||
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41 (mech[i].flags & MECH_SEC_PLAINTEXT) == 0)) {
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42 str_append_c(str, ' ');
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43 str_append(str, "AUTH=");
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44 str_append(str, mech[i].name);
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45 }
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46 }
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47
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48 return str_c(str);
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49 }
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50
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51 static void client_auth_input(struct imap_client *client)
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52 {
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53 char *line;
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54
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55 if (!client_read(client))
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56 return;
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57
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58 if (client->skip_line) {
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59 if (i_stream_next_line(client->common.input) == NULL)
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60 return;
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61
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62 client->skip_line = FALSE;
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63 }
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64
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65 /* @UNSAFE */
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66 line = i_stream_next_line(client->common.input);
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67 if (line == NULL)
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68 return;
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69
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70 if (strcmp(line, "*") == 0) {
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71 sasl_server_auth_client_error(&client->common,
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72 "Authentication aborted");
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73 } else {
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74 auth_client_request_continue(client->common.auth_request, line);
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75 io_remove(&client->io);
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76
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77 /* clear sensitive data */
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78 safe_memset(line, 0, strlen(line));
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79 }
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80 }
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81
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82 static void client_auth_failed(struct imap_client *client)
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83 {
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84 /* get back to normal client input. */
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85 if (client->io != NULL)
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86 io_remove(&client->io);
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87 client->io = io_add(client->common.fd, IO_READ,
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88 client_input, client);
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89 client->common.auth_command_tag = NULL;
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90 client_input(client);
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91 }
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92
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93 static bool client_handle_args(struct imap_client *client,
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94 const char *const *args, bool success)
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95 {
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96 const char *reason = NULL, *host = NULL, *destuser = NULL, *pass = NULL;
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97 string_t *reply;
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98 unsigned int port = 143;
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99 bool proxy = FALSE, temp = FALSE, nologin = !success, proxy_self;
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100 bool authz_failure = FALSE;
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101
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102 for (; *args != NULL; args++) {
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103 if (strcmp(*args, "nologin") == 0)
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104 nologin = TRUE;
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105 else if (strcmp(*args, "proxy") == 0)
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106 proxy = TRUE;
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107 else if (strcmp(*args, "temp") == 0)
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108 temp = TRUE;
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109 else if (strcmp(*args, "authz") == 0)
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110 authz_failure = TRUE;
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111 else if (strncmp(*args, "reason=", 7) == 0)
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112 reason = *args + 7;
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113 else if (strncmp(*args, "host=", 5) == 0)
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114 host = *args + 5;
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115 else if (strncmp(*args, "port=", 5) == 0)
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116 port = atoi(*args + 5);
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117 else if (strncmp(*args, "destuser=", 9) == 0)
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118 destuser = *args + 9;
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119 else if (strncmp(*args, "pass=", 5) == 0)
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120 pass = *args + 5;
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121 else if (strncmp(*args, "user=", 5) == 0) {
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122 /* already handled in login-common */
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123 } else if (auth_debug) {
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124 i_info("Ignoring unknown passdb extra field: %s",
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125 *args);
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126 }
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127 }
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128
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diff changeset
129 if (destuser == NULL)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
130 destuser = client->common.virtual_user;
d344be0bb70f Added IMAP and POP3 proxying support.
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parents: 2766
diff changeset
131
7116
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
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diff changeset
132 proxy_self = proxy &&
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
133 login_proxy_is_ourself(&client->common, host, port, destuser);
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
134 if (proxy && !proxy_self) {
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
135 /* we want to proxy the connection to another server.
5173
723cf9d39692 If authentication failed but it still returns proxy, don't do the proxying.
Timo Sirainen <tss@iki.fi>
parents: 5150
diff changeset
136 don't do this unless authentication succeeded. with
723cf9d39692 If authentication failed but it still returns proxy, don't do the proxying.
Timo Sirainen <tss@iki.fi>
parents: 5150
diff changeset
137 master user proxying we can get FAIL with proxy still set.
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
138
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
139 proxy host=.. [port=..] [destuser=..] pass=.. */
5173
723cf9d39692 If authentication failed but it still returns proxy, don't do the proxying.
Timo Sirainen <tss@iki.fi>
parents: 5150
diff changeset
140 if (!success)
723cf9d39692 If authentication failed but it still returns proxy, don't do the proxying.
Timo Sirainen <tss@iki.fi>
parents: 5150
diff changeset
141 return FALSE;
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
142 if (imap_proxy_new(client, host, port, destuser, pass) < 0)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
143 client_destroy_internal_failure(client);
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
144 return TRUE;
3384
3b75956d20c4 Added configurable logging for login process. Added configurable pop3 logout
Timo Sirainen <tss@iki.fi>
parents: 3059
diff changeset
145 }
3b75956d20c4 Added configurable logging for login process. Added configurable pop3 logout
Timo Sirainen <tss@iki.fi>
parents: 3059
diff changeset
146
6472
6afb29dc9273 If proxy points to the same host/port/user combination as we currently have,
Timo Sirainen <tss@iki.fi>
parents: 6429
diff changeset
147 if (!proxy && host != NULL) {
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
148 /* IMAP referral
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
149
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
150 [nologin] referral host=.. [port=..] [destuser=..]
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
151 [reason=..]
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
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parents: 2736
diff changeset
152
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
153 NO [REFERRAL imap://destuser;AUTH=..@host:port/] Can't login.
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
154 OK [...] Logged in, but you should use this server instead.
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
155 .. [REFERRAL ..] (Reason from auth server)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
156 */
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
157 reply = t_str_new(128);
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
158 str_append(reply, nologin ? "NO " : "OK ");
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
159 str_printfa(reply, "[REFERRAL imap://%s;AUTH=%s@%s",
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
160 destuser, client->common.auth_mech_name, host);
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
161 if (port != 143)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
162 str_printfa(reply, ":%u", port);
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
163 str_append(reply, "/] ");
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
164 if (reason != NULL)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
165 str_append(reply, reason);
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
166 else if (nologin)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
167 str_append(reply, "Try this server instead.");
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
168 else {
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
169 str_append(reply, "Logged in, but you should use "
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
170 "this server instead.");
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
171 }
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
172 client_send_tagline(client, str_c(reply));
3384
3b75956d20c4 Added configurable logging for login process. Added configurable pop3 logout
Timo Sirainen <tss@iki.fi>
parents: 3059
diff changeset
173 if (!nologin) {
7438
65fbb6226141 Log clearly with "auth failed, # attempts" if user gets disconnected before
Timo Sirainen <tss@iki.fi>
parents: 7395
diff changeset
174 client_destroy_success(client, "Login with referral");
3384
3b75956d20c4 Added configurable logging for login process. Added configurable pop3 logout
Timo Sirainen <tss@iki.fi>
parents: 3059
diff changeset
175 return TRUE;
3b75956d20c4 Added configurable logging for login process. Added configurable pop3 logout
Timo Sirainen <tss@iki.fi>
parents: 3059
diff changeset
176 }
7116
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
177 } else if (nologin || proxy_self) {
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
178 /* Authentication went ok, but for some reason user isn't
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
179 allowed to log in. Shouldn't probably happen. */
7116
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
180 if (proxy_self) {
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
181 client_syslog(&client->common,
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
182 "Proxying loops to itself");
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
183 }
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
184
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
185 reply = t_str_new(128);
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
186 if (reason != NULL)
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
187 str_printfa(reply, "NO %s", reason);
8411
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
188 else if (temp || proxy_self) {
8412
6e9100795d89 Moved imap-resp-codes to macros.
Timo Sirainen <tss@iki.fi>
parents: 8411
diff changeset
189 str_append(reply, "NO ["IMAP_RESP_CODE_UNAVAILABLE"] "
8411
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
190 AUTH_TEMP_FAILED_MSG);
8413
24c8bc8098ee Give a different error message if authentication succeeds but authorization fails.
Timo Sirainen <tss@iki.fi>
parents: 8412
diff changeset
191 } else if (authz_failure) {
24c8bc8098ee Give a different error message if authentication succeeds but authorization fails.
Timo Sirainen <tss@iki.fi>
parents: 8412
diff changeset
192 str_append(reply, "NO "IMAP_AUTHZ_FAILED_MSG);
8411
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
193 } else {
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
194 str_append(reply, "NO "IMAP_AUTH_FAILED_MSG);
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
195 }
2768
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
196 client_send_tagline(client, str_c(reply));
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
197 } else {
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
198 /* normal login/failure */
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
199 return FALSE;
d344be0bb70f Added IMAP and POP3 proxying support.
Timo Sirainen <tss@iki.fi>
parents: 2766
diff changeset
200 }
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
201
7116
df5e4bea11e2 If proxying tries to loop to itself, fail the login and log an error.
Timo Sirainen <tss@iki.fi>
parents: 7115
diff changeset
202 i_assert(nologin || proxy_self);
3384
3b75956d20c4 Added configurable logging for login process. Added configurable pop3 logout
Timo Sirainen <tss@iki.fi>
parents: 3059
diff changeset
203
7115
fc06e748f8e4 Assert-crashfix
Timo Sirainen <tss@iki.fi>
parents: 7099
diff changeset
204 if (!client->destroyed)
fc06e748f8e4 Assert-crashfix
Timo Sirainen <tss@iki.fi>
parents: 7099
diff changeset
205 client_auth_failed(client);
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
206 return TRUE;
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
207 }
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
208
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
209 static void sasl_callback(struct client *_client, enum sasl_server_reply reply,
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
210 const char *data, const char *const *args)
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
211 {
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
212 struct imap_client *client = (struct imap_client *)_client;
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
213 struct const_iovec iov[3];
4301
0e10b01960a0 IMAP: Reply with tagged BAD if authentication is aborted because client sent
Timo Sirainen <tss@iki.fi>
parents: 3955
diff changeset
214 const char *msg;
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
215 size_t data_len;
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
216
4790
c6d77f917d12 Fixed potential problems with client disconnecting while master was handling
Timo Sirainen <tss@iki.fi>
parents: 4770
diff changeset
217 i_assert(!client->destroyed ||
c6d77f917d12 Fixed potential problems with client disconnecting while master was handling
Timo Sirainen <tss@iki.fi>
parents: 4770
diff changeset
218 reply == SASL_SERVER_REPLY_CLIENT_ERROR ||
c6d77f917d12 Fixed potential problems with client disconnecting while master was handling
Timo Sirainen <tss@iki.fi>
parents: 4770
diff changeset
219 reply == SASL_SERVER_REPLY_MASTER_FAILED);
4770
88c29111fcee Crashfixes and more asserts. Mostly related to use of AUTHENTICATE/AUTH
Timo Sirainen <tss@iki.fi>
parents: 4416
diff changeset
220
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
221 switch (reply) {
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
222 case SASL_SERVER_REPLY_SUCCESS:
7395
de4881149c0e If we sent client "waiting for auth process" message, we crashed later.
Timo Sirainen <tss@iki.fi>
parents: 7121
diff changeset
223 if (client->to_auth_waiting != NULL)
de4881149c0e If we sent client "waiting for auth process" message, we crashed later.
Timo Sirainen <tss@iki.fi>
parents: 7121
diff changeset
224 timeout_remove(&client->to_auth_waiting);
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
225 if (args != NULL) {
5173
723cf9d39692 If authentication failed but it still returns proxy, don't do the proxying.
Timo Sirainen <tss@iki.fi>
parents: 5150
diff changeset
226 if (client_handle_args(client, args, TRUE))
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
227 break;
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
228 }
7438
65fbb6226141 Log clearly with "auth failed, # attempts" if user gets disconnected before
Timo Sirainen <tss@iki.fi>
parents: 7395
diff changeset
229 client_destroy_success(client, "Login");
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
230 break;
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
231 case SASL_SERVER_REPLY_AUTH_FAILED:
4301
0e10b01960a0 IMAP: Reply with tagged BAD if authentication is aborted because client sent
Timo Sirainen <tss@iki.fi>
parents: 3955
diff changeset
232 case SASL_SERVER_REPLY_CLIENT_ERROR:
7395
de4881149c0e If we sent client "waiting for auth process" message, we crashed later.
Timo Sirainen <tss@iki.fi>
parents: 7121
diff changeset
233 if (client->to_auth_waiting != NULL)
de4881149c0e If we sent client "waiting for auth process" message, we crashed later.
Timo Sirainen <tss@iki.fi>
parents: 7121
diff changeset
234 timeout_remove(&client->to_auth_waiting);
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
235 if (args != NULL) {
5173
723cf9d39692 If authentication failed but it still returns proxy, don't do the proxying.
Timo Sirainen <tss@iki.fi>
parents: 5150
diff changeset
236 if (client_handle_args(client, args, FALSE))
2766
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
237 break;
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
238 }
26a091f3add6 Implemented support for LOGIN-REFERRALS using "referral" and "reason"
Timo Sirainen <tss@iki.fi>
parents: 2736
diff changeset
239
4301
0e10b01960a0 IMAP: Reply with tagged BAD if authentication is aborted because client sent
Timo Sirainen <tss@iki.fi>
parents: 3955
diff changeset
240 msg = reply == SASL_SERVER_REPLY_AUTH_FAILED ? "NO " : "BAD ";
8411
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
241 msg = t_strconcat(msg, data != NULL ? data :
abd0ef855a33 Implemented imap-response-codes draft.
Timo Sirainen <tss@iki.fi>
parents: 8351
diff changeset
242 IMAP_AUTH_FAILED_MSG, NULL);
4301
0e10b01960a0 IMAP: Reply with tagged BAD if authentication is aborted because client sent
Timo Sirainen <tss@iki.fi>
parents: 3955
diff changeset
243 client_send_tagline(client, msg);
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
244
7099
3f5b7bebfd82 Use separate per-client timeouts instead of going through all clients in one
Timo Sirainen <tss@iki.fi>
parents: 7086
diff changeset
245 if (!client->destroyed)
3f5b7bebfd82 Use separate per-client timeouts instead of going through all clients in one
Timo Sirainen <tss@iki.fi>
parents: 7086
diff changeset
246 client_auth_failed(client);
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
247 break;
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
248 case SASL_SERVER_REPLY_MASTER_FAILED:
5846
21e529b8a701 Initial implementation for mail_max_user_connections setting.
Timo Sirainen <tss@iki.fi>
parents: 5835
diff changeset
249 if (data == NULL)
21e529b8a701 Initial implementation for mail_max_user_connections setting.
Timo Sirainen <tss@iki.fi>
parents: 5835
diff changeset
250 client_destroy_internal_failure(client);
21e529b8a701 Initial implementation for mail_max_user_connections setting.
Timo Sirainen <tss@iki.fi>
parents: 5835
diff changeset
251 else {
21e529b8a701 Initial implementation for mail_max_user_connections setting.
Timo Sirainen <tss@iki.fi>
parents: 5835
diff changeset
252 client_send_tagline(client,
21e529b8a701 Initial implementation for mail_max_user_connections setting.
Timo Sirainen <tss@iki.fi>
parents: 5835
diff changeset
253 t_strconcat("NO ", data, NULL));
7438
65fbb6226141 Log clearly with "auth failed, # attempts" if user gets disconnected before
Timo Sirainen <tss@iki.fi>
parents: 7395
diff changeset
254 /* authentication itself succeeded, we just hit some
65fbb6226141 Log clearly with "auth failed, # attempts" if user gets disconnected before
Timo Sirainen <tss@iki.fi>
parents: 7395
diff changeset
255 internal failure. */
65fbb6226141 Log clearly with "auth failed, # attempts" if user gets disconnected before
Timo Sirainen <tss@iki.fi>
parents: 7395
diff changeset
256 client_destroy_success(client, data);
5846
21e529b8a701 Initial implementation for mail_max_user_connections setting.
Timo Sirainen <tss@iki.fi>
parents: 5835
diff changeset
257 }
2733
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
258 break;
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
259 case SASL_SERVER_REPLY_CONTINUE:
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
260 data_len = strlen(data);
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
Timo Sirainen <tss@iki.fi>
parents: 2708
diff changeset
261 iov[0].iov_base = "+ ";
9b9d9c164a31 Login process cleanups. Share more authentication code between pop3/imap.
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262 iov[0].iov_len = 2;
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263 iov[1].iov_base = data;
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264 iov[1].iov_len = data_len;
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265 iov[2].iov_base = "\r\n";
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266 iov[2].iov_len = 2;
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267
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268 /* don't check return value here. it gets tricky if we try
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269 to call client_destroy() in here. */
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270 (void)o_stream_sendv(client->output, iov, 3);
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271
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272 i_assert(client->io == NULL);
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273 client->io = io_add(client->common.fd, IO_READ,
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274 client_auth_input, client);
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275 client_auth_input(client);
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276 return;
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277 }
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278
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279 client_unref(client);
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280 }
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281
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282 static int client_auth_begin(struct imap_client *client, const char *mech_name,
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283 const char *init_resp)
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284 {
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285 client->common.auth_command_tag = client->cmd_tag;
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286
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287 client_ref(client);
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288 sasl_server_auth_begin(&client->common, IMAP_SERVICE_NAME, mech_name,
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289 init_resp, sasl_callback);
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290 if (!client->common.authenticating)
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291 return 1;
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292
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293 /* don't handle input until we get the initial auth reply */
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294 if (client->io != NULL)
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295 io_remove(&client->io);
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296 client_set_auth_waiting(client);
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297 return 0;
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298 }
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299
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300 int cmd_authenticate(struct imap_client *client, const struct imap_arg *args)
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301 {
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302 const char *mech_name, *init_resp = NULL;
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303
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304 /* we want only one argument: authentication mechanism name */
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305 if (args[0].type != IMAP_ARG_ATOM && args[0].type != IMAP_ARG_STRING)
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306 return -1;
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307 if (args[1].type != IMAP_ARG_EOL) {
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308 /* optional SASL initial response */
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309 if (args[1].type != IMAP_ARG_ATOM ||
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310 args[2].type != IMAP_ARG_EOL)
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311 return -1;
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312 init_resp = IMAP_ARG_STR(&args[1]);
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313 }
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314
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315 mech_name = IMAP_ARG_STR(&args[0]);
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316 if (*mech_name == '\0')
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458aa25822fb AUTHENTICATE "" command should return BAD instead of silence.
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317 return -1;
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318 return client_auth_begin(client, mech_name, init_resp);
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319 }
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320
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321 int cmd_login(struct imap_client *client, const struct imap_arg *args)
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322 {
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323 const char *user, *pass;
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324 string_t *plain_login, *base64;
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325
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326 /* two arguments: username and password */
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327 if (args[0].type != IMAP_ARG_ATOM && args[0].type != IMAP_ARG_STRING)
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328 return -1;
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329 if (args[1].type != IMAP_ARG_ATOM && args[1].type != IMAP_ARG_STRING)
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330 return -1;
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331 if (args[2].type != IMAP_ARG_EOL)
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332 return -1;
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333
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334 user = IMAP_ARG_STR(&args[0]);
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335 pass = IMAP_ARG_STR(&args[1]);
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336
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337 if (!client->common.secured && disable_plaintext_auth) {
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338 if (verbose_auth) {
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339 client_syslog(&client->common, "Login failed: "
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340 "Plaintext authentication disabled");
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46f879c46b45 auth_verbose now affects imap/pop3 login processes too. Every authentication
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341 }
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249e6c711e8d Instead of logging only "Aborted login", log also if client tried to use
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diff changeset
342 client->common.auth_tried_disabled_plaintext = TRUE;
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343 client->common.auth_attempts++;
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344 client_send_line(client,
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345 "* BAD [ALERT] Plaintext authentication is disabled, "
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346 "but your client sent password in plaintext anyway. "
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347 "If anyone was listening, the password was exposed.");
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6e9100795d89 Moved imap-resp-codes to macros.
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348 client_send_tagline(client, "NO ["IMAP_RESP_CODE_CLIENTBUG"] "
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abd0ef855a33 Implemented imap-response-codes draft.
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diff changeset
349 AUTH_PLAINTEXT_DISABLED_MSG);
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350 return 1;
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351 }
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352
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353 /* authorization ID \0 authentication ID \0 pass */
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354 plain_login = buffer_create_dynamic(pool_datastack_create(), 64);
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355 buffer_append_c(plain_login, '\0');
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356 buffer_append(plain_login, user, strlen(user));
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357 buffer_append_c(plain_login, '\0');
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358 buffer_append(plain_login, pass, strlen(pass));
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4e77cb0aff21 Added %l, %r and %P variables and mail_log_prefix setting.
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diff changeset
359
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diff changeset
360 base64 = buffer_create_dynamic(pool_datastack_create(),
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diff changeset
361 MAX_BASE64_ENCODED_SIZE(plain_login->used));
0f31778d3c34 Changed dovecot-auth protocol to ASCII based. Should be easier now to write
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diff changeset
362 base64_encode(plain_login->data, plain_login->used, base64);
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3f5b7bebfd82 Use separate per-client timeouts instead of going through all clients in one
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diff changeset
363 return client_auth_begin(client, "PLAIN", str_c(base64));
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364 }