| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| #include <ngx_mail.h> |
| #include <ngx_mail_smtp_module.h> |
| |
| |
| static void *ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf); |
| static char *ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, |
| void *child); |
| |
| |
| static ngx_conf_bitmask_t ngx_mail_smtp_auth_methods[] = { |
| { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, |
| { ngx_string("login"), NGX_MAIL_AUTH_LOGIN_ENABLED }, |
| { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, |
| { ngx_string("external"), NGX_MAIL_AUTH_EXTERNAL_ENABLED }, |
| { ngx_string("none"), NGX_MAIL_AUTH_NONE_ENABLED }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| static ngx_str_t ngx_mail_smtp_auth_methods_names[] = { |
| ngx_string("PLAIN"), |
| ngx_string("LOGIN"), |
| ngx_null_string, /* APOP */ |
| ngx_string("CRAM-MD5"), |
| ngx_string("EXTERNAL"), |
| ngx_null_string /* NONE */ |
| }; |
| |
| |
| static ngx_mail_protocol_t ngx_mail_smtp_protocol = { |
| ngx_string("smtp"), |
| ngx_string("\x04smtp"), |
| { 25, 465, 587, 0 }, |
| NGX_MAIL_SMTP_PROTOCOL, |
| |
| ngx_mail_smtp_init_session, |
| ngx_mail_smtp_init_protocol, |
| ngx_mail_smtp_parse_command, |
| ngx_mail_smtp_auth_state, |
| |
| ngx_string("451 4.3.2 Internal server error" CRLF), |
| ngx_string("421 4.7.1 SSL certificate error" CRLF), |
| ngx_string("421 4.7.1 No required SSL certificate" CRLF) |
| }; |
| |
| |
| static ngx_command_t ngx_mail_smtp_commands[] = { |
| |
| { ngx_string("smtp_client_buffer"), |
| NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_size_slot, |
| NGX_MAIL_SRV_CONF_OFFSET, |
| offsetof(ngx_mail_smtp_srv_conf_t, client_buffer_size), |
| NULL }, |
| |
| { ngx_string("smtp_greeting_delay"), |
| NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1, |
| ngx_conf_set_msec_slot, |
| NGX_MAIL_SRV_CONF_OFFSET, |
| offsetof(ngx_mail_smtp_srv_conf_t, greeting_delay), |
| NULL }, |
| |
| { ngx_string("smtp_capabilities"), |
| NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
| ngx_mail_capabilities, |
| NGX_MAIL_SRV_CONF_OFFSET, |
| offsetof(ngx_mail_smtp_srv_conf_t, capabilities), |
| NULL }, |
| |
| { ngx_string("smtp_auth"), |
| NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
| ngx_conf_set_bitmask_slot, |
| NGX_MAIL_SRV_CONF_OFFSET, |
| offsetof(ngx_mail_smtp_srv_conf_t, auth_methods), |
| &ngx_mail_smtp_auth_methods }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_mail_module_t ngx_mail_smtp_module_ctx = { |
| &ngx_mail_smtp_protocol, /* protocol */ |
| |
| NULL, /* create main configuration */ |
| NULL, /* init main configuration */ |
| |
| ngx_mail_smtp_create_srv_conf, /* create server configuration */ |
| ngx_mail_smtp_merge_srv_conf /* merge server configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_mail_smtp_module = { |
| NGX_MODULE_V1, |
| &ngx_mail_smtp_module_ctx, /* module context */ |
| ngx_mail_smtp_commands, /* module directives */ |
| NGX_MAIL_MODULE, /* module type */ |
| NULL, /* init master */ |
| NULL, /* init module */ |
| NULL, /* init process */ |
| NULL, /* init thread */ |
| NULL, /* exit thread */ |
| NULL, /* exit process */ |
| NULL, /* exit master */ |
| NGX_MODULE_V1_PADDING |
| }; |
| |
| |
| static void * |
| ngx_mail_smtp_create_srv_conf(ngx_conf_t *cf) |
| { |
| ngx_mail_smtp_srv_conf_t *sscf; |
| |
| sscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_smtp_srv_conf_t)); |
| if (sscf == NULL) { |
| return NULL; |
| } |
| |
| sscf->client_buffer_size = NGX_CONF_UNSET_SIZE; |
| sscf->greeting_delay = NGX_CONF_UNSET_MSEC; |
| |
| if (ngx_array_init(&sscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
| != NGX_OK) |
| { |
| return NULL; |
| } |
| |
| return sscf; |
| } |
| |
| |
| static char * |
| ngx_mail_smtp_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
| { |
| ngx_mail_smtp_srv_conf_t *prev = parent; |
| ngx_mail_smtp_srv_conf_t *conf = child; |
| |
| u_char *p, *auth, *last; |
| size_t size; |
| ngx_str_t *c; |
| ngx_uint_t i, m, auth_enabled; |
| ngx_mail_core_srv_conf_t *cscf; |
| |
| ngx_conf_merge_size_value(conf->client_buffer_size, |
| prev->client_buffer_size, |
| (size_t) ngx_pagesize); |
| |
| ngx_conf_merge_msec_value(conf->greeting_delay, |
| prev->greeting_delay, 0); |
| |
| ngx_conf_merge_bitmask_value(conf->auth_methods, |
| prev->auth_methods, |
| (NGX_CONF_BITMASK_SET |
| |NGX_MAIL_AUTH_PLAIN_ENABLED |
| |NGX_MAIL_AUTH_LOGIN_ENABLED)); |
| |
| |
| cscf = ngx_mail_conf_get_module_srv_conf(cf, ngx_mail_core_module); |
| |
| size = sizeof("220 ESMTP ready" CRLF) - 1 + cscf->server_name.len; |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->greeting.len = size; |
| conf->greeting.data = p; |
| |
| *p++ = '2'; *p++ = '2'; *p++ = '0'; *p++ = ' '; |
| p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
| ngx_memcpy(p, " ESMTP ready" CRLF, sizeof(" ESMTP ready" CRLF) - 1); |
| |
| |
| size = sizeof("250 " CRLF) - 1 + cscf->server_name.len; |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->server_name.len = size; |
| conf->server_name.data = p; |
| |
| *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' '; |
| p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
| *p++ = CR; *p = LF; |
| |
| |
| if (conf->capabilities.nelts == 0) { |
| conf->capabilities = prev->capabilities; |
| } |
| |
| size = sizeof("250-") - 1 + cscf->server_name.len + sizeof(CRLF) - 1; |
| |
| c = conf->capabilities.elts; |
| for (i = 0; i < conf->capabilities.nelts; i++) { |
| size += sizeof("250 ") - 1 + c[i].len + sizeof(CRLF) - 1; |
| } |
| |
| auth_enabled = 0; |
| |
| for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
| m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| m <<= 1, i++) |
| { |
| if (m & conf->auth_methods) { |
| size += 1 + ngx_mail_smtp_auth_methods_names[i].len; |
| auth_enabled = 1; |
| } |
| } |
| |
| if (auth_enabled) { |
| size += sizeof("250 AUTH") - 1 + sizeof(CRLF) - 1; |
| } |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->capability.len = size; |
| conf->capability.data = p; |
| |
| last = p; |
| |
| *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-'; |
| p = ngx_cpymem(p, cscf->server_name.data, cscf->server_name.len); |
| *p++ = CR; *p++ = LF; |
| |
| for (i = 0; i < conf->capabilities.nelts; i++) { |
| last = p; |
| *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = '-'; |
| p = ngx_cpymem(p, c[i].data, c[i].len); |
| *p++ = CR; *p++ = LF; |
| } |
| |
| auth = p; |
| |
| if (auth_enabled) { |
| last = p; |
| |
| *p++ = '2'; *p++ = '5'; *p++ = '0'; *p++ = ' '; |
| *p++ = 'A'; *p++ = 'U'; *p++ = 'T'; *p++ = 'H'; |
| |
| for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
| m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| m <<= 1, i++) |
| { |
| if (m & conf->auth_methods) { |
| *p++ = ' '; |
| p = ngx_cpymem(p, ngx_mail_smtp_auth_methods_names[i].data, |
| ngx_mail_smtp_auth_methods_names[i].len); |
| } |
| } |
| |
| *p++ = CR; *p = LF; |
| |
| } else { |
| last[3] = ' '; |
| } |
| |
| size += sizeof("250 STARTTLS" CRLF) - 1; |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->starttls_capability.len = size; |
| conf->starttls_capability.data = p; |
| |
| p = ngx_cpymem(p, conf->capability.data, conf->capability.len); |
| |
| ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1); |
| |
| p = conf->starttls_capability.data |
| + (last - conf->capability.data) + 3; |
| *p = '-'; |
| |
| size = (auth - conf->capability.data) |
| + sizeof("250 STARTTLS" CRLF) - 1; |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->starttls_only_capability.len = size; |
| conf->starttls_only_capability.data = p; |
| |
| p = ngx_cpymem(p, conf->capability.data, auth - conf->capability.data); |
| |
| ngx_memcpy(p, "250 STARTTLS" CRLF, sizeof("250 STARTTLS" CRLF) - 1); |
| |
| if (last < auth) { |
| p = conf->starttls_only_capability.data |
| + (last - conf->capability.data) + 3; |
| *p = '-'; |
| } |
| |
| return NGX_CONF_OK; |
| } |