| |
| /* |
| * 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_pop3_module.h> |
| |
| |
| static void *ngx_mail_pop3_create_srv_conf(ngx_conf_t *cf); |
| static char *ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, |
| void *child); |
| |
| |
| static ngx_str_t ngx_mail_pop3_default_capabilities[] = { |
| ngx_string("TOP"), |
| ngx_string("USER"), |
| ngx_string("UIDL"), |
| ngx_null_string |
| }; |
| |
| |
| static ngx_conf_bitmask_t ngx_mail_pop3_auth_methods[] = { |
| { ngx_string("plain"), NGX_MAIL_AUTH_PLAIN_ENABLED }, |
| { ngx_string("apop"), NGX_MAIL_AUTH_APOP_ENABLED }, |
| { ngx_string("cram-md5"), NGX_MAIL_AUTH_CRAM_MD5_ENABLED }, |
| { ngx_string("external"), NGX_MAIL_AUTH_EXTERNAL_ENABLED }, |
| { ngx_null_string, 0 } |
| }; |
| |
| |
| static ngx_str_t ngx_mail_pop3_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_pop3_protocol = { |
| ngx_string("pop3"), |
| ngx_string("\x04pop3"), |
| { 110, 995, 0, 0 }, |
| NGX_MAIL_POP3_PROTOCOL, |
| |
| ngx_mail_pop3_init_session, |
| ngx_mail_pop3_init_protocol, |
| ngx_mail_pop3_parse_command, |
| ngx_mail_pop3_auth_state, |
| |
| ngx_string("-ERR internal server error" CRLF), |
| ngx_string("-ERR SSL certificate error" CRLF), |
| ngx_string("-ERR No required SSL certificate" CRLF) |
| }; |
| |
| |
| static ngx_command_t ngx_mail_pop3_commands[] = { |
| |
| { ngx_string("pop3_capabilities"), |
| NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE, |
| ngx_mail_capabilities, |
| NGX_MAIL_SRV_CONF_OFFSET, |
| offsetof(ngx_mail_pop3_srv_conf_t, capabilities), |
| NULL }, |
| |
| { ngx_string("pop3_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_pop3_srv_conf_t, auth_methods), |
| &ngx_mail_pop3_auth_methods }, |
| |
| ngx_null_command |
| }; |
| |
| |
| static ngx_mail_module_t ngx_mail_pop3_module_ctx = { |
| &ngx_mail_pop3_protocol, /* protocol */ |
| |
| NULL, /* create main configuration */ |
| NULL, /* init main configuration */ |
| |
| ngx_mail_pop3_create_srv_conf, /* create server configuration */ |
| ngx_mail_pop3_merge_srv_conf /* merge server configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_mail_pop3_module = { |
| NGX_MODULE_V1, |
| &ngx_mail_pop3_module_ctx, /* module context */ |
| ngx_mail_pop3_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_pop3_create_srv_conf(ngx_conf_t *cf) |
| { |
| ngx_mail_pop3_srv_conf_t *pscf; |
| |
| pscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_pop3_srv_conf_t)); |
| if (pscf == NULL) { |
| return NULL; |
| } |
| |
| if (ngx_array_init(&pscf->capabilities, cf->pool, 4, sizeof(ngx_str_t)) |
| != NGX_OK) |
| { |
| return NULL; |
| } |
| |
| return pscf; |
| } |
| |
| |
| static char * |
| ngx_mail_pop3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) |
| { |
| ngx_mail_pop3_srv_conf_t *prev = parent; |
| ngx_mail_pop3_srv_conf_t *conf = child; |
| |
| u_char *p; |
| size_t size, stls_only_size; |
| ngx_str_t *c, *d; |
| ngx_uint_t i, m; |
| |
| ngx_conf_merge_bitmask_value(conf->auth_methods, |
| prev->auth_methods, |
| (NGX_CONF_BITMASK_SET |
| |NGX_MAIL_AUTH_PLAIN_ENABLED)); |
| |
| if (conf->auth_methods & NGX_MAIL_AUTH_PLAIN_ENABLED) { |
| conf->auth_methods |= NGX_MAIL_AUTH_LOGIN_ENABLED; |
| } |
| |
| if (conf->capabilities.nelts == 0) { |
| conf->capabilities = prev->capabilities; |
| } |
| |
| if (conf->capabilities.nelts == 0) { |
| |
| for (d = ngx_mail_pop3_default_capabilities; d->len; d++) { |
| c = ngx_array_push(&conf->capabilities); |
| if (c == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| *c = *d; |
| } |
| } |
| |
| size = sizeof("+OK Capability list follows" CRLF) - 1 |
| + sizeof("." CRLF) - 1; |
| |
| stls_only_size = size + sizeof("STLS" CRLF) - 1; |
| |
| c = conf->capabilities.elts; |
| for (i = 0; i < conf->capabilities.nelts; i++) { |
| size += c[i].len + sizeof(CRLF) - 1; |
| |
| if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) { |
| continue; |
| } |
| |
| stls_only_size += c[i].len + sizeof(CRLF) - 1; |
| } |
| |
| size += sizeof("SASL") - 1 + sizeof(CRLF) - 1; |
| |
| for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
| m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| m <<= 1, i++) |
| { |
| if (ngx_mail_pop3_auth_methods_names[i].len == 0) { |
| continue; |
| } |
| |
| if (m & conf->auth_methods) { |
| size += 1 + ngx_mail_pop3_auth_methods_names[i].len; |
| } |
| } |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->capability.len = size; |
| conf->capability.data = p; |
| |
| p = ngx_cpymem(p, "+OK Capability list follows" CRLF, |
| sizeof("+OK Capability list follows" CRLF) - 1); |
| |
| for (i = 0; i < conf->capabilities.nelts; i++) { |
| p = ngx_cpymem(p, c[i].data, c[i].len); |
| *p++ = CR; *p++ = LF; |
| } |
| |
| p = ngx_cpymem(p, "SASL", sizeof("SASL") - 1); |
| |
| for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
| m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| m <<= 1, i++) |
| { |
| if (ngx_mail_pop3_auth_methods_names[i].len == 0) { |
| continue; |
| } |
| |
| if (m & conf->auth_methods) { |
| *p++ = ' '; |
| p = ngx_cpymem(p, ngx_mail_pop3_auth_methods_names[i].data, |
| ngx_mail_pop3_auth_methods_names[i].len); |
| } |
| } |
| |
| *p++ = CR; *p++ = LF; |
| |
| *p++ = '.'; *p++ = CR; *p = LF; |
| |
| |
| size += sizeof("STLS" 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 - (sizeof("." CRLF) - 1)); |
| |
| p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1); |
| *p++ = '.'; *p++ = CR; *p = LF; |
| |
| |
| size = sizeof("+OK methods supported:" CRLF) - 1 |
| + sizeof("." CRLF) - 1; |
| |
| for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
| m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| m <<= 1, i++) |
| { |
| if (ngx_mail_pop3_auth_methods_names[i].len == 0) { |
| continue; |
| } |
| |
| if (m & conf->auth_methods) { |
| size += ngx_mail_pop3_auth_methods_names[i].len |
| + sizeof(CRLF) - 1; |
| } |
| } |
| |
| p = ngx_pnalloc(cf->pool, size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->auth_capability.data = p; |
| conf->auth_capability.len = size; |
| |
| p = ngx_cpymem(p, "+OK methods supported:" CRLF, |
| sizeof("+OK methods supported:" CRLF) - 1); |
| |
| for (m = NGX_MAIL_AUTH_PLAIN_ENABLED, i = 0; |
| m <= NGX_MAIL_AUTH_EXTERNAL_ENABLED; |
| m <<= 1, i++) |
| { |
| if (ngx_mail_pop3_auth_methods_names[i].len == 0) { |
| continue; |
| } |
| |
| if (m & conf->auth_methods) { |
| p = ngx_cpymem(p, ngx_mail_pop3_auth_methods_names[i].data, |
| ngx_mail_pop3_auth_methods_names[i].len); |
| *p++ = CR; *p++ = LF; |
| } |
| } |
| |
| *p++ = '.'; *p++ = CR; *p = LF; |
| |
| |
| p = ngx_pnalloc(cf->pool, stls_only_size); |
| if (p == NULL) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->starttls_only_capability.len = stls_only_size; |
| conf->starttls_only_capability.data = p; |
| |
| p = ngx_cpymem(p, "+OK Capability list follows" CRLF, |
| sizeof("+OK Capability list follows" CRLF) - 1); |
| |
| for (i = 0; i < conf->capabilities.nelts; i++) { |
| if (ngx_strcasecmp(c[i].data, (u_char *) "USER") == 0) { |
| continue; |
| } |
| |
| p = ngx_cpymem(p, c[i].data, c[i].len); |
| *p++ = CR; *p++ = LF; |
| } |
| |
| p = ngx_cpymem(p, "STLS" CRLF, sizeof("STLS" CRLF) - 1); |
| *p++ = '.'; *p++ = CR; *p = LF; |
| |
| return NGX_CONF_OK; |
| } |