mirror of
https://github.com/nginx/nginx.git
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308 lines
8.4 KiB
C
308 lines
8.4 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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#include <ngx_mail.h>
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#include <ngx_mail_smtp_module.h>
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static void *ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf);
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static char *ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent,
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void *child);
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static ngx_conf_bitmask_t ngx_mail_smtp_auth_methods[] = {
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{ ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED },
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{ ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED },
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{ ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED },
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{ ngx_string("none"), NGX_MAIL_AUTH_NONE_ENABLED },
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{ ngx_null_string, 0 }
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};
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static ngx_str_t ngx_mail_smtp_auth_methods_names[] = {
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ngx_string("PLAIN"),
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ngx_string("LOGIN"),
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ngx_null_string, /* APOP */
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ngx_string("CRAM-MD5"),
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ngx_null_string /* NONE */
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};
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static ngx_mail_protocol_t ngx_mail_smtp_protocol = {
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ngx_string("smtp"),
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{ 25, 465, 587, 0 },
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NGX_MAIL_SMTP_PROTOCOL,
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ngx_mail_smtp_init_session,
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ngx_mail_smtp_init_protocol,
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ngx_mail_smtp_parse_command,
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ngx_mail_smtp_auth_state,
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ngx_string("451 4.3.2 Internal server error" CRLF)
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};
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static ngx_command_t ngx_mail_smtp_commands[] = {
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{ ngx_string("smtp_client_buffer"),
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NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_size_slot,
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NGX_MAIL_SRV_CONF_OFFSET,
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offsetof(ngx_mail_smtp_srv_conf_t, client_buffer_size),
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NULL },
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{ ngx_string("smtp_greeting_delay"),
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NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
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ngx_conf_set_msec_slot,
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NGX_MAIL_SRV_CONF_OFFSET,
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offsetof(ngx_mail_smtp_srv_conf_t, greeting_delay),
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NULL },
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{ ngx_string("smtp_capabilities"),
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NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
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ngx_mail_capabilities,
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NGX_MAIL_SRV_CONF_OFFSET,
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offsetof(ngx_mail_smtp_srv_conf_t, capabilities),
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NULL },
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{ ngx_string("smtp_auth"),
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NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
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ngx_conf_set_bitmask_slot,
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NGX_MAIL_SRV_CONF_OFFSET,
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offsetof(ngx_mail_smtp_srv_conf_t, auth_methods),
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&ngx_mail_smtp_auth_methods },
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ngx_null_command
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};
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static ngx_mail_module_t ngx_mail_smtp_module_ctx = {
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&ngx_mail_smtp_protocol, /* protocol */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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ngx_mail_smtp_create_srv_conf, /* create server configuration */
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ngx_mail_smtp_merge_srv_conf /* merge server configuration */
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};
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ngx_module_t ngx_mail_smtp_module = {
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NGX_MODULE_V1,
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&ngx_mail_smtp_module_ctx, /* module context */
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ngx_mail_smtp_commands, /* module directives */
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NGX_MAIL_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static void *
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ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf)
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{
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ngx_mail_smtp_srv_conf_t *sscf;
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sscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_smtp_srv_conf_t));
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if (sscf == NULL) {
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return NULL;
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}
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sscf->client_buffer_size = NGX_CONF_UNSET_SIZE;
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sscf->greeting_delay = NGX_CONF_UNSET_MSEC;
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if (ngx_array_init(&sscf->capabilities, cf->pool, 4, sizeof(ngx_str_t))
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!= NGX_OK)
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{
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return NULL;
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}
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return sscf;
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}
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static char *
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ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
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{
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ngx_mail_smtp_srv_conf_t *prev = parent;
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ngx_mail_smtp_srv_conf_t *conf = child;
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u_char *p, *auth, *last;
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size_t size;
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ngx_str_t *c;
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ngx_uint_t i, m, auth_enabled;
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ngx_mail_core_srv_conf_t *cscf;
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ngx_conf_merge_size_value(conf->client_buffer_size,
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prev->client_buffer_size,
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(size_t) ngx_pagesize);
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ngx_conf_merge_msec_value(conf->greeting_delay,
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prev->greeting_delay, 0);
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ngx_conf_merge_bitmask_value(conf->auth_methods,
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prev->auth_methods,
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(NGX_CONF_BITMASK_SET
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|NGX_MAIL_AUTH_PLAIN_ENABLED
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|NGX_MAIL_AUTH_LOGIN_ENABLED));
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cscf = ngx_mail_conf_get_module_srv_conf(cf, ngx_mail_core_module);
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size = sizeof("220 ESMTP ready" CRLF) - 1 + cscf->server_name.len;
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p = ngx_pnalloc(cf->pool, size);
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if (p == NULL) {
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return NGX_CONF_ERROR;
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}
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conf->greeting.len = size;
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conf->greeting.data = p;
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*p++ = '2'; *p++ = '2'; *p++ = '0'; *p++ = ' ';
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p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
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ngx_memcpy(p, " ESMTP ready" CRLF, sizeof(" ESMTP ready" CRLF) - 1);
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size = sizeof("250 " CRLF) - 1 + cscf->server_name.len;
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p = ngx_pnalloc(cf->pool, size);
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if (p == NULL) {
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return NGX_CONF_ERROR;
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}
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conf->server_name.len = size;
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conf->server_name.data = p;
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*p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' ';
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p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
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*p++ = CR; *p = LF;
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if (conf->capabilities.nelts == 0) {
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conf->capabilities = prev->capabilities;
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}
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size = sizeof("250-") - 1 + cscf->server_name.len + sizeof(CRLF) - 1;
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c = conf->capabilities.elts;
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for (i = 0; i < conf->capabilities.nelts; i++) {
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size += sizeof("250 ") - 1 + c[i].len + sizeof(CRLF) - 1;
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}
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auth_enabled = 0;
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for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
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m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
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m <<= 1, i++)
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{
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if (m & conf->auth_methods) {
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size += 1 + ngx_mail_smtp_auth_methods_names[i].len;
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auth_enabled = 1;
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}
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}
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if (auth_enabled) {
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size += sizeof("250 AUTH") - 1 + sizeof(CRLF) - 1;
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}
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p = ngx_pnalloc(cf->pool, size);
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if (p == NULL) {
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return NGX_CONF_ERROR;
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}
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conf->capability.len = size;
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conf->capability.data = p;
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last = p;
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*p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-';
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p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len);
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*p++ = CR; *p++ = LF;
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for (i = 0; i < conf->capabilities.nelts; i++) {
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last = p;
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*p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-';
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p = ngx_cpymem(p, c[i].data, c[i].len);
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*p++ = CR; *p++ = LF;
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}
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auth = p;
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if (auth_enabled) {
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last = p;
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*p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' ';
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*p++ = 'A'; *p++ = 'U'; *p++ = 'T'; *p++ = 'H';
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for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0;
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m <= NGX_MAIL_AUTH_CRAM_MD5_ENABLED;
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m <<= 1, i++)
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{
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if (m & conf->auth_methods) {
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*p++ = ' ';
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p = ngx_cpymem(p, ngx_mail_smtp_auth_methods_names[i].data,
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ngx_mail_smtp_auth_methods_names[i].len);
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}
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}
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*p++ = CR; *p = LF;
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} else {
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last[3] = ' ';
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}
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size += sizeof("250 STARTTLS" CRLF) - 1;
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p = ngx_pnalloc(cf->pool, size);
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if (p == NULL) {
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return NGX_CONF_ERROR;
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}
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conf->starttls_capability.len = size;
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conf->starttls_capability.data = p;
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p = ngx_cpymem(p, conf->capability.data, conf->capability.len);
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p = ngx_cpymem(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1);
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*p++ = CR; *p = LF;
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p = conf->starttls_capability.data
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+ (last - conf->capability.data) + 3;
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*p = '-';
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size = (auth - conf->capability.data)
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+ sizeof("250 STARTTLS" CRLF) - 1;
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p = ngx_pnalloc(cf->pool, size);
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if (p == NULL) {
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return NGX_CONF_ERROR;
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}
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conf->starttls_only_capability.len = size;
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conf->starttls_only_capability.data = p;
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p = ngx_cpymem(p, conf->capability.data, auth - conf->capability.data);
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ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1);
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if (last < auth) {
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p = conf->starttls_only_capability.data
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+ (last - conf->capability.data) + 3;
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*p = '-';
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}
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return NGX_CONF_OK;
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}
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