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1.1 misho 1:
2: /*
3: * Copyright (C) Igor Sysoev
4: * Copyright (C) Nginx, Inc.
5: */
6:
7:
8: #include <ngx_config.h>
9: #include <ngx_core.h>
10: #include <ngx_event.h>
11: #include <ngx_mail.h>
12: #include <ngx_mail_pop3_module.h>
13:
14:
15: static void *ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf);
16: static char *ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent,
17: void *child);
18:
19:
20: static ngx_str_t ngx_mail_pop3_default_capabilities[] = {
21: ngx_string("TOP"),
22: ngx_string("USER"),
23: ngx_string("UIDL"),
24: ngx_null_string
25: };
26:
27:
28: static ngx_conf_bitmask_t ngx_mail_pop3_auth_methods[] = {
29: { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED },
30: { ngx_string("apop"), NGX_MAIL_AUTH_APOP_ENABLED },
31: { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED },
32: { ngx_null_string, 0 }
33: };
34:
35:
36: static ngx_str_t ngx_mail_pop3_auth_plain_capability =
37: ngx_string("+OK methods supported:" CRLF
38: "LOGIN" CRLF
39: "PLAIN" CRLF
40: "." CRLF);
41:
42:
43: static ngx_str_t ngx_mail_pop3_auth_cram_md5_capability =
44: ngx_string("+OK methods supported:" CRLF
45: "LOGIN" CRLF
46: "PLAIN" CRLF
47: "CRAM-MD5" CRLF
48: "." CRLF);
49:
50:
51: static ngx_mail_protocol_t ngx_mail_pop3_protocol = {
52: ngx_string("pop3"),
53: { 110, 995, 0, 0 },
54: NGX_MAIL_POP3_PROTOCOL,
55:
56: ngx_mail_pop3_init_session,
57: ngx_mail_pop3_init_protocol,
58: ngx_mail_pop3_parse_command,
59: ngx_mail_pop3_auth_state,
60:
61: ngx_string("-ERR internal server error" CRLF)
62: };
63:
64:
65: static ngx_command_t ngx_mail_pop3_commands[] = {
66:
67: { ngx_string("pop3_capabilities"),
68: NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
69: ngx_mail_capabilities,
70: NGX_MAIL_SRV_CONF_OFFSET,
71: offsetof(ngx_mail_pop3_srv_conf_t, capabilities),
72: NULL },
73:
74: { ngx_string("pop3_auth"),
75: NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
76: ngx_conf_set_bitmask_slot,
77: NGX_MAIL_SRV_CONF_OFFSET,
78: offsetof(ngx_mail_pop3_srv_conf_t, auth_methods),
79: &ngx_mail_pop3_auth_methods },
80:
81: ngx_null_command
82: };
83:
84:
85: static ngx_mail_module_t ngx_mail_pop3_module_ctx = {
86: &ngx_mail_pop3_protocol, /* protocol */
87:
88: NULL, /* create main configuration */
89: NULL, /* init main configuration */
90:
91: ngx_mail_pop3_create_srv_conf, /* create server configuration */
92: ngx_mail_pop3_merge_srv_conf /* merge server configuration */
93: };
94:
95:
96: ngx_module_t ngx_mail_pop3_module = {
97: NGX_MODULE_V1,
98: &ngx_mail_pop3_module_ctx, /* module context */
99: ngx_mail_pop3_commands, /* module directives */
100: NGX_MAIL_MODULE, /* module type */
101: NULL, /* init master */
102: NULL, /* init module */
103: NULL, /* init process */
104: NULL, /* init thread */
105: NULL, /* exit thread */
106: NULL, /* exit process */
107: NULL, /* exit master */
108: NGX_MODULE_V1_PADDING
109: };
110:
111:
112: static void *
113: ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf)
114: {
115: ngx_mail_pop3_srv_conf_t *pscf;
116:
117: pscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_pop3_srv_conf_t));
118: if (pscf == NULL) {
119: return NULL;
120: }
121:
122: if (ngx_array_init(&pscf->capabilities, cf->pool, 4, sizeof(ngx_str_t))
123: != NGX_OK)
124: {
125: return NULL;
126: }
127:
128: return pscf;
129: }
130:
131:
132: static char *
133: ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
134: {
135: ngx_mail_pop3_srv_conf_t *prev = parent;
136: ngx_mail_pop3_srv_conf_t *conf = child;
137:
138: u_char *p;
139: size_t size, stls_only_size;
140: ngx_str_t *c, *d;
141: ngx_uint_t i;
142:
143: ngx_conf_merge_bitmask_value(conf->auth_methods,
144: prev->auth_methods,
145: (NGX_CONF_BITMASK_SET
146: |NGX_MAIL_AUTH_PLAIN_ENABLED));
147:
148: if (conf->capabilities.nelts == 0) {
149: conf->capabilities = prev->capabilities;
150: }
151:
152: if (conf->capabilities.nelts == 0) {
153:
154: for (d = ngx_mail_pop3_default_capabilities; d->len; d++) {
155: c = ngx_array_push(&conf->capabilities);
156: if (c == NULL) {
157: return NGX_CONF_ERROR;
158: }
159:
160: *c = *d;
161: }
162: }
163:
164: size = sizeof("+OK Capability list follows" CRLF) - 1
165: + sizeof("." CRLF) - 1;
166:
167: stls_only_size = size + sizeof("STLS" CRLF) - 1;
168:
169: c = conf->capabilities.elts;
170: for (i = 0; i < conf->capabilities.nelts; i++) {
171: size += c[i].len + sizeof(CRLF) - 1;
172:
173: if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) {
174: continue;
175: }
176:
177: stls_only_size += c[i].len + sizeof(CRLF) - 1;
178: }
179:
180: if (conf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) {
181: size += sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1;
182:
183: } else {
184: size += sizeof("SASL LOGIN PLAIN" CRLF) - 1;
185: }
186:
187: p = ngx_pnalloc(cf->pool, size);
188: if (p == NULL) {
189: return NGX_CONF_ERROR;
190: }
191:
192: conf->capability.len = size;
193: conf->capability.data = p;
194:
195: p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
196: sizeof("+OK Capability list follows" CRLF) - 1);
197:
198: for (i = 0; i < conf->capabilities.nelts; i++) {
199: p = ngx_cpymem(p, c[i].data, c[i].len);
200: *p++ = CR; *p++ = LF;
201: }
202:
203: if (conf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) {
204: p = ngx_cpymem(p, "SASL LOGIN PLAIN CRAM-MD5" CRLF,
205: sizeof("SASL LOGIN PLAIN CRAM-MD5" CRLF) - 1);
206:
207: } else {
208: p = ngx_cpymem(p, "SASL LOGIN PLAIN" CRLF,
209: sizeof("SASL LOGIN PLAIN" CRLF) - 1);
210: }
211:
212: *p++ = '.'; *p++ = CR; *p = LF;
213:
214:
215: size += sizeof("STLS" CRLF) - 1;
216:
217: p = ngx_pnalloc(cf->pool, size);
218: if (p == NULL) {
219: return NGX_CONF_ERROR;
220: }
221:
222: conf->starttls_capability.len = size;
223: conf->starttls_capability.data = p;
224:
225: p = ngx_cpymem(p, conf->capability.data,
226: conf->capability.len - (sizeof("." CRLF) - 1));
227:
228: p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
229: *p++ = '.'; *p++ = CR; *p = LF;
230:
231:
232: if (conf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) {
233: conf->auth_capability = ngx_mail_pop3_auth_cram_md5_capability;
234:
235: } else {
236: conf->auth_capability = ngx_mail_pop3_auth_plain_capability;
237: }
238:
239:
240: p = ngx_pnalloc(cf->pool, stls_only_size);
241: if (p == NULL) {
242: return NGX_CONF_ERROR;
243: }
244:
245: conf->starttls_only_capability.len = stls_only_size;
246: conf->starttls_only_capability.data = p;
247:
248: p = ngx_cpymem(p, "+OK Capability list follows" CRLF,
249: sizeof("+OK Capability list follows" CRLF) - 1);
250:
251: for (i = 0; i < conf->capabilities.nelts; i++) {
252: if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) {
253: continue;
254: }
255:
256: p = ngx_cpymem(p, c[i].data, c[i].len);
257: *p++ = CR; *p++ = LF;
258: }
259:
260: p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1);
261: *p++ = '.'; *p++ = CR; *p = LF;
262:
263: return NGX_CONF_OK;
264: }