|
326
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #include <ngx_config.h>
|
|
|
8 #include <ngx_core.h>
|
|
|
9 #include <ngx_event.h>
|
|
|
10 #include <ngx_mail.h>
|
|
|
11 #include <ngx_mail_smtp_module.h>
|
|
|
12
|
|
|
13
|
|
|
14 static void *ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf);
|
|
|
15 static char *ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent,
|
|
|
16 void *child);
|
|
|
17
|
|
|
18
|
|
|
19 static ngx_conf_bitmask_t ngx_mail_smtp_auth_methods[] = {
|
|
|
20 { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED },
|
|
|
21 { ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED },
|
|
|
22 { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED },
|
|
|
23 { ngx_null_string, 0 }
|
|
|
24 };
|
|
|
25
|
|
|
26
|
|
|
27 static ngx_str_t ngx_mail_smtp_auth_methods_names[] = {
|
|
|
28 ngx_string("PLAIN"),
|
|
|
29 ngx_string("LOGIN"),
|
|
|
30 ngx_null_string, /* APOP */
|
|
|
31 ngx_string("CRAM-MD5")
|
|
|
32 };
|
|
|
33
|
|
|
34
|
|
|
35 static ngx_mail_protocol_t ngx_mail_smtp_protocol = {
|
|
|
36 ngx_string("smtp"),
|
|
|
37 { 25, 465, 587, 0 },
|
|
|
38 NGX_MAIL_SMTP_PROTOCOL,
|
|
|
39
|
|
|
40 ngx_mail_smtp_init_session,
|
|
|
41 ngx_mail_smtp_init_protocol,
|
|
|
42 ngx_mail_smtp_parse_command,
|
|
|
43 ngx_mail_smtp_auth_state,
|
|
|
44
|
|
|
45 ngx_string("451 4.3.2 Internal server error" CRLF)
|
|
|
46 };
|
|
|
47
|
|
|
48
|
|
|
49 static ngx_command_t ngx_mail_smtp_commands[] = {
|
|
|
50
|
|
|
51 { ngx_string("smtp_client_buffer"),
|
|
|
52 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
53 ngx_conf_set_size_slot,
|
|
|
54 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
55 offsetof(ngx_mail_smtp_srv_conf_t, client_buffer_size),
|
|
|
56 NULL },
|
|
|
57
|
|
|
58 { ngx_string("smtp_greeting_delay"),
|
|
|
59 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
|
|
|
60 ngx_conf_set_msec_slot,
|
|
|
61 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
62 offsetof(ngx_mail_smtp_srv_conf_t, greeting_delay),
|
|
|
63 NULL },
|
|
|
64
|
|
|
65 { ngx_string("smtp_capabilities"),
|
|
|
66 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
|
|
|
67 ngx_mail_capabilities,
|
|
|
68 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
69 offsetof(ngx_mail_smtp_srv_conf_t, capabilities),
|
|
|
70 NULL },
|
|
|
71
|
|
|
72 { ngx_string("smtp_auth"),
|
|
|
73 NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
|
|
|
74 ngx_conf_set_bitmask_slot,
|
|
|
75 NGX_MAIL_SRV_CONF_OFFSET,
|
|
|
76 offsetof(ngx_mail_smtp_srv_conf_t, auth_methods),
|
|
|
77 &ngx_mail_smtp_auth_methods },
|
|
|
78
|
|
|
79 ngx_null_command
|
|
|
80 };
|
|
|
81
|
|
|
82
|
|
|
83 static ngx_mail_module_t ngx_mail_smtp_module_ctx = {
|
|
|
84 &ngx_mail_smtp_protocol, /* protocol */
|
|
|
85
|
|
|
86 NULL, /* create main configuration */
|
|
|
87 NULL, /* init main configuration */
|
|
|
88
|
|
|
89 ngx_mail_smtp_create_srv_conf, /* create server configuration */
|
|
|
90 ngx_mail_smtp_merge_srv_conf /* merge server configuration */
|
|
|
91 };
|
|
|
92
|
|
|
93
|
|
|
94 ngx_module_t ngx_mail_smtp_module = {
|
|
|
95 NGX_MODULE_V1,
|
|
|
96 &ngx_mail_smtp_module_ctx, /* module context */
|
|
|
97 ngx_mail_smtp_commands, /* module directives */
|
|
|
98 NGX_MAIL_MODULE, /* module type */
|
|
|
99 NULL, /* init master */
|
|
|
100 NULL, /* init module */
|
|
|
101 NULL, /* init process */
|
|
|
102 NULL, /* init thread */
|
|
|
103 NULL, /* exit thread */
|
|
|
104 NULL, /* exit process */
|
|
|
105 NULL, /* exit master */
|
|
|
106 NGX_MODULE_V1_PADDING
|
|
|
107 };
|
|
|
108
|
|
|
109
|
|
|
110 static void *
|
|
|
111 ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf)
|
|
|
112 {
|
|
|
113 ngx_mail_smtp_srv_conf_t *sscf;
|
|
|
114
|
|
|
115 sscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_smtp_srv_conf_t));
|
|
|
116 if (sscf == NULL) {
|
|
|
117 return NULL;
|
|
|
118 }
|
|
|
119
|
|
|
120 sscf->client_buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
121 sscf->greeting_delay = NGX_CONF_UNSET_MSEC;
|
|
|
122
|
|
|
123 if (ngx_array_init(&sscf->capabilities, cf->pool, 4, sizeof(ngx_str_t))
|
|
|
124 != NGX_OK)
|
|
|
125 {
|
|
|
126 return NULL;
|
|
|
127 }
|
|
|
128
|
|
|
129 return sscf;
|
|
|
130 }
|
|
|
131
|
|
|
132
|
|
|
133 static char *
|
|
|
134 ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
135 {
|
|
|
136 ngx_mail_smtp_srv_conf_t *prev = parent;
|
|
|
137 ngx_mail_smtp_srv_conf_t *conf = child;
|
|
|
138
|
|
|
139 u_char *p, *auth;
|
|
|
140 size_t size;
|
|
|
141 ngx_str_t *c;
|
|
|
142 ngx_uint_t i, m;
|
|
|
143 ngx_mail_core_srv_conf_t *cscf;
|
|
|
144
|
|
|
145 ngx_conf_merge_size_value(conf->client_buffer_size,
|
|
|
146 prev->client_buffer_size,
|
|
|
147 (size_t) ngx_pagesize);
|
|
|
148
|
|
|
149 ngx_conf_merge_msec_value(conf->greeting_delay,
|
|
|
150 prev->greeting_delay, 0);
|
|
|
151
|
|
|
152 ngx_conf_merge_bitmask_value(conf->auth_methods,
|
|
|
153 prev->auth_methods,
|
|
|
154 (NGX_CONF_BITMASK_SET
|
|
|
155 |NGX_MAIL_AUTH_PLAIN_ENABLED
|
|
|
156 |NGX_MAIL_AUTH_LOGIN_ENABLED));
|
|
|
157
|
|
|
158
|
|
|
159 cscf = ngx_mail_conf_get_module_srv_conf(cf, ngx_mail_core_module);
|
|
|
160
|
|
|
161 size = sizeof("220 ESMTP ready" CRLF) - 1 + cscf->server_name.len;
|
|
|
162
|
|
|
163 p = ngx_palloc(cf->pool, size);
|
|
|
164 if (p == NULL) {
|
|
|
165 return NGX_CONF_ERROR;
|
|
|
166 }
|
|
|
167
|
|
|
168 conf->greeting.len = size;
|
|
|
169 conf->greeting.data = p;
|
|
|
170
|
|
|
171 *p++ = '2'; *p++ = '2'; *p++ = '0'; *p++ = ' ';
|
|
|
172 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
|
|
|
173 ngx_memcpy(p, " ESMTP ready" CRLF, sizeof(" ESMTP ready" CRLF) - 1);
|
|
|
174
|
|
|
175
|
|
|
176 size = sizeof("250 " CRLF) - 1 + cscf->server_name.len;
|
|
|
177
|
|
|
178 p = ngx_palloc(cf->pool, size);
|
|
|
179 if (p == NULL) {
|
|
|
180 return NGX_CONF_ERROR;
|
|
|
181 }
|
|
|
182
|
|
|
183 conf->server_name.len = size;
|
|
|
184 conf->server_name.data = p;
|
|
|
185
|
|
|
186 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' ';
|
|
|
187 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
|
|
|
188 *p++ = CR; *p = LF;
|
|
|
189
|
|
|
190
|
|
|
191 if (conf->capabilities.nelts == 0) {
|
|
|
192 conf->capabilities = prev->capabilities;
|
|
|
193 }
|
|
|
194
|
|
|
195 size = sizeof("250-") - 1 + cscf->server_name.len + sizeof(CRLF) - 1
|
|
|
196 + sizeof("250 AUTH") - 1 + sizeof(CRLF) - 1;
|
|
|
197
|
|
|
198 c = conf->capabilities.elts;
|
|
|
199 for (i = 0; i < conf->capabilities.nelts; i++) {
|
|
|
200 size += sizeof("250 ") - 1 + c[i].len + sizeof(CRLF) - 1;
|
|
|
201 }
|
|
|
202
|
|
|
203 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
|
|
|
204 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
|
|
|
205 m <<= 1, i++)
|
|
|
206 {
|
|
|
207 if (m & conf->auth_methods) {
|
|
|
208 size += 1 + ngx_mail_smtp_auth_methods_names[i].len;
|
|
|
209 }
|
|
|
210 }
|
|
|
211
|
|
|
212 p = ngx_palloc(cf->pool, size);
|
|
|
213 if (p == NULL) {
|
|
|
214 return NGX_CONF_ERROR;
|
|
|
215 }
|
|
|
216
|
|
|
217 conf->capability.len = size;
|
|
|
218 conf->capability.data = p;
|
|
|
219
|
|
|
220 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-';
|
|
|
221 p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
|
|
|
222 *p++ = CR; *p++ = LF;
|
|
|
223
|
|
|
224 for (i = 0; i < conf->capabilities.nelts; i++) {
|
|
|
225 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-';
|
|
|
226 p = ngx_cpymem(p, c[i].data, c[i].len);
|
|
|
227 *p++ = CR; *p++ = LF;
|
|
|
228 }
|
|
|
229
|
|
|
230 auth = p;
|
|
|
231
|
|
|
232 *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' ';
|
|
|
233 *p++ = 'A'; *p++ = 'U'; *p++ = 'T'; *p++ = 'H';
|
|
|
234
|
|
|
235 for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
|
|
|
236 m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
|
|
|
237 m <<= 1, i++)
|
|
|
238 {
|
|
|
239 if (m & conf->auth_methods) {
|
|
|
240 *p++ = ' ';
|
|
|
241 p = ngx_cpymem(p, ngx_mail_smtp_auth_methods_names[i].data,
|
|
|
242 ngx_mail_smtp_auth_methods_names[i].len);
|
|
|
243 }
|
|
|
244 }
|
|
|
245
|
|
|
246 *p++ = CR; *p = LF;
|
|
|
247
|
|
|
248 size += sizeof("250 STARTTLS" CRLF) - 1;
|
|
|
249
|
|
|
250 p = ngx_palloc(cf->pool, size);
|
|
|
251 if (p == NULL) {
|
|
|
252 return NGX_CONF_ERROR;
|
|
|
253 }
|
|
|
254
|
|
|
255 conf->starttls_capability.len = size;
|
|
|
256 conf->starttls_capability.data = p;
|
|
|
257
|
|
|
258 p = ngx_cpymem(p, conf->capability.data,
|
|
|
259 conf->capability.len);
|
|
|
260
|
|
|
261 p = ngx_cpymem(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1);
|
|
|
262 *p++ = CR; *p = LF;
|
|
|
263
|
|
|
264 p = conf->starttls_capability.data
|
|
|
265 + (auth - conf->capability.data) + 3;
|
|
|
266 *p = '-';
|
|
|
267
|
|
|
268 size = (auth - conf->capability.data)
|
|
|
269 + sizeof("250 STARTTLS" CRLF) - 1;
|
|
|
270
|
|
|
271 p = ngx_palloc(cf->pool, size);
|
|
|
272 if (p == NULL) {
|
|
|
273 return NGX_CONF_ERROR;
|
|
|
274 }
|
|
|
275
|
|
|
276 conf->starttls_only_capability.len = size;
|
|
|
277 conf->starttls_only_capability.data = p;
|
|
|
278
|
|
|
279 p = ngx_cpymem(p, conf->capability.data,
|
|
|
280 auth - conf->capability.data);
|
|
|
281
|
|
|
282 ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1);
|
|
|
283
|
|
|
284 return NGX_CONF_OK;
|
|
|
285 }
|
