| /* | |
| * Copyright (C) Igor Sysoev | |
| */ | |
| #include <ngx_config.h> | |
| #include <ngx_core.h> | |
| #include <ngx_event.h> | |
| #include <ngx_mail.h> | |
| static void ngx_mail_init_session(ngx_connection_t *c); | |
| static void ngx_mail_init_protocol(ngx_event_t *rev); | |
| static ngx_int_t ngx_mail_decode_auth_plain(ngx_mail_session_t *s, | |
| ngx_str_t *encoded); | |
| static void ngx_mail_do_auth(ngx_mail_session_t *s); | |
| static ngx_int_t ngx_mail_read_command(ngx_mail_session_t *s); | |
| static u_char *ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len); | |
| #if (NGX_MAIL_SSL) | |
| static void ngx_mail_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c); | |
| static void ngx_mail_ssl_handshake_handler(ngx_connection_t *c); | |
| #endif | |
| static ngx_str_t greetings[] = { | |
| ngx_string("+OK POP3 ready" CRLF), | |
| ngx_string("* OK IMAP4 ready" CRLF) | |
| /* SMTP greeting */ | |
| }; | |
| static ngx_str_t internal_server_errors[] = { | |
| ngx_string("-ERR internal server error" CRLF), | |
| ngx_string("* BAD internal server error" CRLF), | |
| ngx_string("451 4.3.2 Internal server error" CRLF), | |
| }; | |
| static u_char pop3_ok[] = "+OK" CRLF; | |
| static u_char pop3_next[] = "+ " CRLF; | |
| static u_char pop3_username[] = "+ VXNlcm5hbWU6" CRLF; | |
| static u_char pop3_password[] = "+ UGFzc3dvcmQ6" CRLF; | |
| static u_char pop3_invalid_command[] = "-ERR invalid command" CRLF; | |
| static u_char imap_star[] = "* "; | |
| static u_char imap_ok[] = "OK completed" CRLF; | |
| static u_char imap_next[] = "+ OK" CRLF; | |
| static u_char imap_bye[] = "* BYE" CRLF; | |
| static u_char imap_invalid_command[] = "BAD invalid command" CRLF; | |
| static u_char smtp_ok[] = "250 2.0.0 OK" CRLF; | |
| static u_char smtp_bye[] = "221 2.0.0 Bye" CRLF; | |
| static u_char smtp_next[] = "334 " CRLF; | |
| static u_char smtp_username[] = "334 VXNlcm5hbWU6" CRLF; | |
| static u_char smtp_password[] = "334 UGFzc3dvcmQ6" CRLF; | |
| static u_char smtp_invalid_command[] = "500 5.5.1 Invalid command" CRLF; | |
| static u_char smtp_invalid_argument[] = "501 5.5.4 Invalid argument" CRLF; | |
| static u_char smtp_auth_required[] = "530 5.7.1 Authentication required" CRLF; | |
| void | |
| ngx_mail_init_connection(ngx_connection_t *c) | |
| { | |
| in_addr_t in_addr; | |
| socklen_t len; | |
| ngx_uint_t i; | |
| struct sockaddr_in sin; | |
| ngx_mail_log_ctx_t *ctx; | |
| ngx_mail_in_port_t *imip; | |
| ngx_mail_in_addr_t *imia; | |
| ngx_mail_session_t *s; | |
| #if (NGX_MAIL_SSL) | |
| ngx_mail_ssl_conf_t *sslcf; | |
| #endif | |
| /* find the server configuration for the address:port */ | |
| /* AF_INET only */ | |
| imip = c->listening->servers; | |
| imia = imip->addrs; | |
| i = 0; | |
| if (imip->naddrs > 1) { | |
| /* | |
| * There are several addresses on this port and one of them | |
| * is the "*:port" wildcard so getsockname() is needed to determine | |
| * the server address. | |
| * | |
| * AcceptEx() already gave this address. | |
| */ | |
| #if (NGX_WIN32) | |
| if (c->local_sockaddr) { | |
| in_addr = | |
| ((struct sockaddr_in *) c->local_sockaddr)->sin_addr.s_addr; | |
| } else | |
| #endif | |
| { | |
| len = sizeof(struct sockaddr_in); | |
| if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) { | |
| ngx_connection_error(c, ngx_socket_errno, | |
| "getsockname() failed"); | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| in_addr = sin.sin_addr.s_addr; | |
| } | |
| /* the last address is "*" */ | |
| for ( /* void */ ; i < imip->naddrs - 1; i++) { | |
| if (in_addr == imia[i].addr) { | |
| break; | |
| } | |
| } | |
| } | |
| s = ngx_pcalloc(c->pool, sizeof(ngx_mail_session_t)); | |
| if (s == NULL) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| s->main_conf = imia[i].ctx->main_conf; | |
| s->srv_conf = imia[i].ctx->srv_conf; | |
| s->addr_text = &imia[i].addr_text; | |
| c->data = s; | |
| s->connection = c; | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, "*%ui client %V connected to %V", | |
| c->number, &c->addr_text, s->addr_text); | |
| ctx = ngx_palloc(c->pool, sizeof(ngx_mail_log_ctx_t)); | |
| if (ctx == NULL) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| ctx->client = &c->addr_text; | |
| ctx->session = s; | |
| c->log->connection = c->number; | |
| c->log->handler = ngx_mail_log_error; | |
| c->log->data = ctx; | |
| c->log->action = "sending client greeting line"; | |
| c->log_error = NGX_ERROR_INFO; | |
| #if (NGX_MAIL_SSL) | |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
| if (sslcf->enable) { | |
| ngx_mail_ssl_init_connection(&sslcf->ssl, c); | |
| return; | |
| } | |
| #endif | |
| ngx_mail_init_session(c); | |
| } | |
| #if (NGX_MAIL_SSL) | |
| static void | |
| ngx_mail_starttls_handler(ngx_event_t *rev) | |
| { | |
| ngx_connection_t *c; | |
| ngx_mail_session_t *s; | |
| ngx_mail_ssl_conf_t *sslcf; | |
| c = rev->data; | |
| s = c->data; | |
| s->starttls = 1; | |
| c->log->action = "in starttls state"; | |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
| ngx_mail_ssl_init_connection(&sslcf->ssl, c); | |
| } | |
| static void | |
| ngx_mail_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c) | |
| { | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| if (ngx_ssl_handshake(c) == NGX_AGAIN) { | |
| s = c->data; | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| ngx_add_timer(c->read, cscf->timeout); | |
| c->ssl->handler = ngx_mail_ssl_handshake_handler; | |
| return; | |
| } | |
| ngx_mail_ssl_handshake_handler(c); | |
| } | |
| static void | |
| ngx_mail_ssl_handshake_handler(ngx_connection_t *c) | |
| { | |
| ngx_mail_session_t *s; | |
| if (c->ssl->handshaked) { | |
| s = c->data; | |
| if (s->starttls) { | |
| c->read->handler = ngx_mail_init_protocol; | |
| c->write->handler = ngx_mail_send; | |
| ngx_mail_init_protocol(c->read); | |
| return; | |
| } | |
| ngx_mail_init_session(c); | |
| return; | |
| } | |
| ngx_mail_close_connection(c); | |
| } | |
| #endif | |
| static void | |
| ngx_mail_init_session(ngx_connection_t *c) | |
| { | |
| u_char *p; | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| c->read->handler = ngx_mail_init_protocol; | |
| c->write->handler = ngx_mail_send; | |
| s = c->data; | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| s->protocol = cscf->protocol; | |
| s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_mail_max_module); | |
| if (s->ctx == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (s->protocol == NGX_MAIL_SMTP_PROTOCOL) { | |
| s->out = cscf->smtp_greeting; | |
| } else { | |
| s->out = greetings[s->protocol]; | |
| } | |
| if ((s->protocol == NGX_MAIL_POP3_PROTOCOL | |
| && (cscf->pop3_auth_methods | |
| & (NGX_MAIL_AUTH_APOP_ENABLED|NGX_MAIL_AUTH_CRAM_MD5_ENABLED))) | |
| || (s->protocol == NGX_MAIL_SMTP_PROTOCOL | |
| && (cscf->smtp_auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED))) | |
| { | |
| s->salt.data = ngx_palloc(c->pool, | |
| sizeof(" <18446744073709551616.@>" CRLF) - 1 | |
| + NGX_TIME_T_LEN | |
| + cscf->server_name.len); | |
| if (s->salt.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| s->salt.len = ngx_sprintf(s->salt.data, "<%ul.%T@%V>" CRLF, | |
| ngx_random(), ngx_time(), &cscf->server_name) | |
| - s->salt.data; | |
| if (s->protocol == NGX_MAIL_POP3_PROTOCOL) { | |
| s->out.data = ngx_palloc(c->pool, | |
| greetings[0].len + 1 + s->salt.len); | |
| if (s->out.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| p = ngx_cpymem(s->out.data, | |
| greetings[0].data, greetings[0].len - 2); | |
| *p++ = ' '; | |
| p = ngx_cpymem(p, s->salt.data, s->salt.len); | |
| s->out.len = p - s->out.data; | |
| } | |
| } | |
| ngx_add_timer(c->read, cscf->timeout); | |
| if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) { | |
| ngx_mail_close_connection(c); | |
| } | |
| ngx_mail_send(c->write); | |
| } | |
| void | |
| ngx_mail_send(ngx_event_t *wev) | |
| { | |
| ngx_int_t n; | |
| ngx_connection_t *c; | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| c = wev->data; | |
| s = c->data; | |
| if (wev->timedout) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
| c->timedout = 1; | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| if (s->out.len == 0) { | |
| if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { | |
| ngx_mail_close_connection(c); | |
| } | |
| return; | |
| } | |
| n = c->send(c, s->out.data, s->out.len); | |
| if (n > 0) { | |
| s->out.len -= n; | |
| if (wev->timer_set) { | |
| ngx_del_timer(wev); | |
| } | |
| if (s->quit) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| if (s->blocked) { | |
| c->read->handler(c->read); | |
| } | |
| return; | |
| } | |
| if (n == NGX_ERROR) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| /* n == NGX_AGAIN */ | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| ngx_add_timer(c->write, cscf->timeout); | |
| if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| } | |
| static void | |
| ngx_mail_init_protocol(ngx_event_t *rev) | |
| { | |
| size_t size; | |
| ngx_connection_t *c; | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| c = rev->data; | |
| c->log->action = "in auth state"; | |
| if (rev->timedout) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
| c->timedout = 1; | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| s = c->data; | |
| switch (s->protocol) { | |
| case NGX_MAIL_POP3_PROTOCOL: | |
| size = 128; | |
| s->mail_state = ngx_pop3_start; | |
| c->read->handler = ngx_pop3_auth_state; | |
| break; | |
| case NGX_MAIL_IMAP_PROTOCOL: | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| size = cscf->imap_client_buffer_size; | |
| s->mail_state = ngx_imap_start; | |
| c->read->handler = ngx_imap_auth_state; | |
| break; | |
| default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| size = 512; | |
| s->mail_state = ngx_smtp_start; | |
| c->read->handler = ngx_smtp_auth_state; | |
| break; | |
| } | |
| if (s->buffer == NULL) { | |
| if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) | |
| == NGX_ERROR) | |
| { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| s->buffer = ngx_create_temp_buf(c->pool, size); | |
| if (s->buffer == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| } | |
| c->read->handler(rev); | |
| } | |
| void | |
| ngx_pop3_auth_state(ngx_event_t *rev) | |
| { | |
| u_char *p, *last, *text; | |
| ssize_t size; | |
| ngx_int_t rc; | |
| ngx_str_t *arg, salt; | |
| ngx_connection_t *c; | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| #if (NGX_MAIL_SSL) | |
| ngx_mail_ssl_conf_t *sslcf; | |
| #endif | |
| c = rev->data; | |
| s = c->data; | |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 auth state"); | |
| if (rev->timedout) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
| c->timedout = 1; | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| if (s->out.len) { | |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "pop3 send handler busy"); | |
| s->blocked = 1; | |
| return; | |
| } | |
| s->blocked = 0; | |
| rc = ngx_mail_read_command(s); | |
| if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
| return; | |
| } | |
| text = pop3_ok; | |
| size = sizeof(pop3_ok) - 1; | |
| if (rc == NGX_OK) { | |
| switch (s->mail_state) { | |
| case ngx_pop3_start: | |
| switch (s->command) { | |
| case NGX_POP3_USER: | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, | |
| ngx_mail_ssl_module); | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } | |
| #endif | |
| if (s->args.nelts == 1) { | |
| s->mail_state = ngx_pop3_user; | |
| arg = s->args.elts; | |
| s->login.len = arg[0].len; | |
| s->login.data = ngx_palloc(c->pool, s->login.len); | |
| if (s->login.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 login: \"%V\"", &s->login); | |
| break; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| case NGX_POP3_CAPA: | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, | |
| ngx_mail_ssl_module); | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { | |
| size = cscf->pop3_starttls_capability.len; | |
| text = cscf->pop3_starttls_capability.data; | |
| break; | |
| } | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
| size = cscf->pop3_starttls_only_capability.len; | |
| text = cscf->pop3_starttls_only_capability.data; | |
| break; | |
| } | |
| } | |
| #endif | |
| size = cscf->pop3_capability.len; | |
| text = cscf->pop3_capability.data; | |
| break; | |
| case NGX_POP3_APOP: | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, | |
| ngx_mail_ssl_module); | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } | |
| #endif | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| if ((cscf->pop3_auth_methods & NGX_MAIL_AUTH_APOP_ENABLED) | |
| && s->args.nelts == 2) | |
| { | |
| arg = s->args.elts; | |
| s->login.len = arg[0].len; | |
| s->login.data = ngx_palloc(c->pool, s->login.len); | |
| if (s->login.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
| s->passwd.len = arg[1].len; | |
| s->passwd.data = ngx_palloc(c->pool, s->passwd.len); | |
| if (s->passwd.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); | |
| ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 apop: \"%V\" \"%V\"", | |
| &s->login, &s->passwd); | |
| s->auth_method = NGX_MAIL_AUTH_APOP; | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| case NGX_POP3_AUTH: | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, | |
| ngx_mail_ssl_module); | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } | |
| #endif | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| if (s->args.nelts == 0) { | |
| size = cscf->pop3_auth_capability.len; | |
| text = cscf->pop3_auth_capability.data; | |
| s->state = 0; | |
| break; | |
| } | |
| arg = s->args.elts; | |
| if (arg[0].len == 5) { | |
| if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) | |
| == 0) | |
| { | |
| if (s->args.nelts != 1) { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| s->mail_state = ngx_pop3_auth_login_username; | |
| size = sizeof(pop3_username) - 1; | |
| text = pop3_username; | |
| break; | |
| } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", | |
| 5) | |
| == 0) | |
| { | |
| if (s->args.nelts == 1) { | |
| s->mail_state = ngx_pop3_auth_plain; | |
| size = sizeof(pop3_next) - 1; | |
| text = pop3_next; | |
| break; | |
| } | |
| if (s->args.nelts == 2) { | |
| /* | |
| * workaround for Eudora for Mac: it sends | |
| * AUTH PLAIN [base64 encoded] | |
| */ | |
| rc = ngx_mail_decode_auth_plain(s, &arg[1]); | |
| if (rc == NGX_OK) { | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| if (rc == NGX_ERROR) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
| break; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } else if (arg[0].len == 8 | |
| && ngx_strncasecmp(arg[0].data, | |
| (u_char *) "CRAM-MD5", 8) | |
| == 0) | |
| { | |
| if (!(cscf->pop3_auth_methods | |
| & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) | |
| || s->args.nelts != 1) | |
| { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| s->mail_state = ngx_pop3_auth_cram_md5; | |
| text = ngx_palloc(c->pool, | |
| sizeof("+ " CRLF) - 1 | |
| + ngx_base64_encoded_length(s->salt.len)); | |
| if (text == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| text[0] = '+'; text[1]= ' '; | |
| salt.data = &text[2]; | |
| s->salt.len -= 2; | |
| ngx_encode_base64(&salt, &s->salt); | |
| s->salt.len += 2; | |
| size = 2 + salt.len; | |
| text[size++] = CR; text[size++] = LF; | |
| break; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| case NGX_POP3_QUIT: | |
| s->quit = 1; | |
| break; | |
| case NGX_POP3_NOOP: | |
| break; | |
| #if (NGX_MAIL_SSL) | |
| case NGX_POP3_STLS: | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, | |
| ngx_mail_ssl_module); | |
| if (sslcf->starttls) { | |
| c->read->handler = ngx_mail_starttls_handler; | |
| break; | |
| } | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| #endif | |
| default: | |
| s->mail_state = ngx_pop3_start; | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| break; | |
| case ngx_pop3_user: | |
| switch (s->command) { | |
| case NGX_POP3_PASS: | |
| if (s->args.nelts == 1) { | |
| arg = s->args.elts; | |
| s->passwd.len = arg[0].len; | |
| s->passwd.data = ngx_palloc(c->pool, s->passwd.len); | |
| if (s->passwd.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 passwd: \"%V\"", &s->passwd); | |
| #endif | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| case NGX_POP3_CAPA: | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| size = cscf->pop3_capability.len; | |
| text = cscf->pop3_capability.data; | |
| break; | |
| case NGX_POP3_QUIT: | |
| s->quit = 1; | |
| break; | |
| case NGX_POP3_NOOP: | |
| break; | |
| default: | |
| s->mail_state = ngx_pop3_start; | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| break; | |
| /* suppress warinings */ | |
| case ngx_pop3_passwd: | |
| break; | |
| case ngx_pop3_auth_login_username: | |
| arg = s->args.elts; | |
| s->mail_state = ngx_pop3_auth_login_password; | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 auth login username: \"%V\"", &arg[0]); | |
| s->login.data = ngx_palloc(c->pool, | |
| ngx_base64_decoded_length(arg[0].len)); | |
| if (s->login.data == NULL){ | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH LOGIN command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 auth login username: \"%V\"", &s->login); | |
| size = sizeof(pop3_password) - 1; | |
| text = pop3_password; | |
| break; | |
| case ngx_pop3_auth_login_password: | |
| arg = s->args.elts; | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 auth login password: \"%V\"", &arg[0]); | |
| #endif | |
| s->passwd.data = ngx_palloc(c->pool, | |
| ngx_base64_decoded_length(arg[0].len)); | |
| if (s->passwd.data == NULL){ | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH LOGIN command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 auth login password: \"%V\"", &s->passwd); | |
| #endif | |
| ngx_mail_do_auth(s); | |
| return; | |
| case ngx_pop3_auth_plain: | |
| arg = s->args.elts; | |
| rc = ngx_mail_decode_auth_plain(s, &arg[0]); | |
| if (rc == NGX_OK) { | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| if (rc == NGX_ERROR) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
| break; | |
| case ngx_pop3_auth_cram_md5: | |
| arg = s->args.elts; | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 auth cram-md5: \"%V\"", &arg[0]); | |
| s->login.data = ngx_palloc(c->pool, | |
| ngx_base64_decoded_length(arg[0].len)); | |
| if (s->login.data == NULL){ | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH CRAM-MD5 command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| p = s->login.data; | |
| last = p + s->login.len; | |
| while (p < last) { | |
| if (*p++ == ' ') { | |
| s->login.len = p - s->login.data - 1; | |
| s->passwd.len = last - p; | |
| s->passwd.data = p; | |
| break; | |
| } | |
| } | |
| if (s->passwd.len != 32) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid CRAM-MD5 hash " | |
| "in AUTH CRAM-MD5 command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "pop3 auth cram-md5: \"%V\" \"%V\"", | |
| &s->login, &s->passwd); | |
| s->auth_method = NGX_MAIL_AUTH_CRAM_MD5; | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| } | |
| if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
| s->mail_state = ngx_pop3_start; | |
| s->state = 0; | |
| text = pop3_invalid_command; | |
| size = sizeof(pop3_invalid_command) - 1; | |
| } | |
| s->args.nelts = 0; | |
| s->buffer->pos = s->buffer->start; | |
| s->buffer->last = s->buffer->start; | |
| if (s->state) { | |
| s->arg_start = s->buffer->start; | |
| } | |
| s->out.data = text; | |
| s->out.len = size; | |
| ngx_mail_send(c->write); | |
| } | |
| void | |
| ngx_imap_auth_state(ngx_event_t *rev) | |
| { | |
| u_char *p, *last, *text, *dst, *src, *end; | |
| ssize_t text_len, last_len; | |
| ngx_str_t *arg; | |
| ngx_int_t rc; | |
| ngx_uint_t tag, i; | |
| ngx_connection_t *c; | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| #if (NGX_MAIL_SSL) | |
| ngx_mail_ssl_conf_t *sslcf; | |
| #endif | |
| c = rev->data; | |
| s = c->data; | |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth state"); | |
| if (rev->timedout) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
| c->timedout = 1; | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| if (s->out.len) { | |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap send handler busy"); | |
| s->blocked = 1; | |
| return; | |
| } | |
| s->blocked = 0; | |
| rc = ngx_mail_read_command(s); | |
| if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
| return; | |
| } | |
| tag = 1; | |
| text = NULL; | |
| text_len = 0; | |
| last = imap_ok; | |
| last_len = sizeof(imap_ok) - 1; | |
| if (rc == NGX_OK) { | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, "imap auth command: %i", | |
| s->command); | |
| if (s->backslash) { | |
| arg = s->args.elts; | |
| for (i = 0; i < s->args.nelts; i++) { | |
| dst = arg[i].data; | |
| end = dst + arg[i].len; | |
| for (src = dst; src < end; dst++) { | |
| *dst = *src; | |
| if (*src++ == '\\') { | |
| *dst = *src++; | |
| } | |
| } | |
| arg[i].len = dst - arg[i].data; | |
| } | |
| s->backslash = 0; | |
| } | |
| switch (s->command) { | |
| case NGX_IMAP_LOGIN: | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } | |
| #endif | |
| arg = s->args.elts; | |
| if (s->args.nelts == 2 && arg[0].len) { | |
| s->login.len = arg[0].len; | |
| s->login.data = ngx_palloc(c->pool, s->login.len); | |
| if (s->login.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->login.data, arg[0].data, s->login.len); | |
| s->passwd.len = arg[1].len; | |
| s->passwd.data = ngx_palloc(c->pool, s->passwd.len); | |
| if (s->passwd.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "imap login:\"%V\" passwd:\"%V\"", | |
| &s->login, &s->passwd); | |
| #else | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "imap login:\"%V\"", &s->login); | |
| #endif | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| case NGX_IMAP_CAPABILITY: | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { | |
| text_len = cscf->imap_starttls_capability.len; | |
| text = cscf->imap_starttls_capability.data; | |
| break; | |
| } | |
| if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { | |
| text_len = cscf->imap_starttls_only_capability.len; | |
| text = cscf->imap_starttls_only_capability.data; | |
| break; | |
| } | |
| } | |
| #endif | |
| text_len = cscf->imap_capability.len; | |
| text = cscf->imap_capability.data; | |
| break; | |
| case NGX_IMAP_LOGOUT: | |
| s->quit = 1; | |
| text = imap_bye; | |
| text_len = sizeof(imap_bye) - 1; | |
| break; | |
| case NGX_IMAP_NOOP: | |
| break; | |
| #if (NGX_MAIL_SSL) | |
| case NGX_IMAP_STARTTLS: | |
| if (c->ssl == NULL) { | |
| sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); | |
| if (sslcf->starttls) { | |
| c->read->handler = ngx_mail_starttls_handler; | |
| break; | |
| } | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| #endif | |
| default: | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } else if (rc == NGX_IMAP_NEXT) { | |
| last = imap_next; | |
| last_len = sizeof(imap_next) - 1; | |
| tag = 0; | |
| } | |
| if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
| last = imap_invalid_command; | |
| last_len = sizeof(imap_invalid_command) - 1; | |
| } | |
| if (tag) { | |
| if (s->tag.len == 0) { | |
| s->tag.len = sizeof(imap_star) - 1; | |
| s->tag.data = (u_char *) imap_star; | |
| } | |
| if (s->tagged_line.len < s->tag.len + text_len + last_len) { | |
| s->tagged_line.len = s->tag.len + text_len + last_len; | |
| s->tagged_line.data = ngx_palloc(c->pool, s->tagged_line.len); | |
| if (s->tagged_line.data == NULL) { | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| } | |
| s->out.data = s->tagged_line.data; | |
| s->out.len = s->tag.len + text_len + last_len; | |
| p = s->out.data; | |
| if (text) { | |
| p = ngx_cpymem(p, text, text_len); | |
| } | |
| p = ngx_cpymem(p, s->tag.data, s->tag.len); | |
| ngx_memcpy(p, last, last_len); | |
| } else { | |
| s->out.data = last; | |
| s->out.len = last_len; | |
| } | |
| if (rc != NGX_IMAP_NEXT) { | |
| s->args.nelts = 0; | |
| s->buffer->pos = s->buffer->start; | |
| s->buffer->last = s->buffer->start; | |
| s->tag.len = 0; | |
| } | |
| ngx_mail_send(c->write); | |
| } | |
| void | |
| ngx_smtp_auth_state(ngx_event_t *rev) | |
| { | |
| u_char *p, *last, *text, ch; | |
| ssize_t size; | |
| ngx_int_t rc; | |
| ngx_str_t *arg, salt, l; | |
| ngx_uint_t i; | |
| ngx_connection_t *c; | |
| ngx_mail_session_t *s; | |
| ngx_mail_core_srv_conf_t *cscf; | |
| c = rev->data; | |
| s = c->data; | |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp auth state"); | |
| if (rev->timedout) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out"); | |
| c->timedout = 1; | |
| ngx_mail_close_connection(c); | |
| return; | |
| } | |
| if (s->out.len) { | |
| ngx_log_debug0(NGX_LOG_DEBUG_MAIL, c->log, 0, "smtp send handler busy"); | |
| s->blocked = 1; | |
| return; | |
| } | |
| s->blocked = 0; | |
| rc = ngx_mail_read_command(s); | |
| if (rc == NGX_AGAIN || rc == NGX_ERROR) { | |
| return; | |
| } | |
| text = NULL; | |
| size = 0; | |
| if (rc == NGX_OK) { | |
| switch (s->mail_state) { | |
| case ngx_smtp_start: | |
| switch (s->command) { | |
| case NGX_SMTP_HELO: | |
| case NGX_SMTP_EHLO: | |
| cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); | |
| if (s->args.nelts != 1) { | |
| text = smtp_invalid_argument; | |
| size = sizeof(smtp_invalid_argument) - 1; | |
| s->state = 0; | |
| break; | |
| } | |
| arg = s->args.elts; | |
| s->smtp_helo.len = arg[0].len; | |
| s->smtp_helo.data = ngx_palloc(c->pool, arg[0].len); | |
| if (s->smtp_helo.data == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| ngx_memcpy(s->smtp_helo.data, arg[0].data, arg[0].len); | |
| if (s->command == NGX_SMTP_HELO) { | |
| size = cscf->smtp_server_name.len; | |
| text = cscf->smtp_server_name.data; | |
| } else { | |
| s->esmtp = 1; | |
| size = cscf->smtp_capability.len; | |
| text = cscf->smtp_capability.data; | |
| } | |
| break; | |
| case NGX_SMTP_AUTH: | |
| if (s->args.nelts == 0) { | |
| text = smtp_invalid_argument; | |
| size = sizeof(smtp_invalid_argument) - 1; | |
| s->state = 0; | |
| break; | |
| } | |
| arg = s->args.elts; | |
| if (arg[0].len == 5) { | |
| if (ngx_strncasecmp(arg[0].data, (u_char *) "LOGIN", 5) | |
| == 0) | |
| { | |
| if (s->args.nelts != 1) { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| s->mail_state = ngx_smtp_auth_login_username; | |
| size = sizeof(smtp_username) - 1; | |
| text = smtp_username; | |
| break; | |
| } else if (ngx_strncasecmp(arg[0].data, (u_char *) "PLAIN", | |
| 5) | |
| == 0) | |
| { | |
| if (s->args.nelts == 1) { | |
| s->mail_state = ngx_smtp_auth_plain; | |
| size = sizeof(smtp_next) - 1; | |
| text = smtp_next; | |
| break; | |
| } | |
| if (s->args.nelts == 2) { | |
| rc = ngx_mail_decode_auth_plain(s, &arg[1]); | |
| if (rc == NGX_OK) { | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| if (rc == NGX_ERROR) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
| break; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| } else if (arg[0].len == 8 | |
| && ngx_strncasecmp(arg[0].data, | |
| (u_char *) "CRAM-MD5", 8) | |
| == 0) | |
| { | |
| cscf = ngx_mail_get_module_srv_conf(s, | |
| ngx_mail_core_module); | |
| if (!(cscf->smtp_auth_methods | |
| & NGX_MAIL_AUTH_CRAM_MD5_ENABLED) | |
| || s->args.nelts != 1) | |
| { | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| s->mail_state = ngx_smtp_auth_cram_md5; | |
| text = ngx_palloc(c->pool, | |
| sizeof("334 " CRLF) - 1 | |
| + ngx_base64_encoded_length(s->salt.len)); | |
| if (text == NULL) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| text[0] = '3'; text[1]= '3'; text[2] = '4'; text[3]= ' '; | |
| salt.data = &text[4]; | |
| s->salt.len -= 2; | |
| ngx_encode_base64(&salt, &s->salt); | |
| s->salt.len += 2; | |
| size = 4 + salt.len; | |
| text[size++] = CR; text[size++] = LF; | |
| break; | |
| } | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| case NGX_SMTP_QUIT: | |
| s->quit = 1; | |
| text = smtp_bye; | |
| size = sizeof(smtp_bye) - 1; | |
| break; | |
| case NGX_SMTP_MAIL: | |
| if (s->connection->log->log_level >= NGX_LOG_INFO) { | |
| l.len = s->buffer->last - s->buffer->start; | |
| l.data = s->buffer->start; | |
| for (i = 0; i < l.len; i++) { | |
| ch = l.data[i]; | |
| if (ch != CR && ch != LF) { | |
| continue; | |
| } | |
| l.data[i] = ' '; | |
| } | |
| while (i) { | |
| if (l.data[i - 1] != ' ') { | |
| break; | |
| } | |
| i--; | |
| } | |
| l.len = i; | |
| ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| "client was rejected: \"%V\"", &l); | |
| } | |
| text = smtp_auth_required; | |
| size = sizeof(smtp_auth_required) - 1; | |
| break; | |
| case NGX_SMTP_NOOP: | |
| case NGX_SMTP_RSET: | |
| text = smtp_ok; | |
| size = sizeof(smtp_ok) - 1; | |
| break; | |
| } | |
| break; | |
| case ngx_smtp_auth_login_username: | |
| arg = s->args.elts; | |
| s->mail_state = ngx_smtp_auth_login_password; | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "smtp auth login username: \"%V\"", &arg[0]); | |
| s->login.data = ngx_palloc(c->pool, | |
| ngx_base64_decoded_length(arg[0].len)); | |
| if (s->login.data == NULL){ | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH LOGIN command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "smtp auth login username: \"%V\"", &s->login); | |
| size = sizeof(smtp_password) - 1; | |
| text = smtp_password; | |
| break; | |
| case ngx_smtp_auth_login_password: | |
| arg = s->args.elts; | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "smtp auth login password: \"%V\"", &arg[0]); | |
| #endif | |
| s->passwd.data = ngx_palloc(c->pool, | |
| ngx_base64_decoded_length(arg[0].len)); | |
| if (s->passwd.data == NULL){ | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH LOGIN command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "smtp auth login password: \"%V\"", &s->passwd); | |
| #endif | |
| ngx_mail_do_auth(s); | |
| return; | |
| case ngx_smtp_auth_plain: | |
| arg = s->args.elts; | |
| rc = ngx_mail_decode_auth_plain(s, &arg[0]); | |
| if (rc == NGX_OK) { | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| if (rc == NGX_ERROR) { | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| /* rc == NGX_MAIL_PARSE_INVALID_COMMAND */ | |
| break; | |
| case ngx_smtp_auth_cram_md5: | |
| arg = s->args.elts; | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "smtp auth cram-md5: \"%V\"", &arg[0]); | |
| s->login.data = ngx_palloc(c->pool, | |
| ngx_base64_decoded_length(arg[0].len)); | |
| if (s->login.data == NULL){ | |
| ngx_mail_session_internal_server_error(s); | |
| return; | |
| } | |
| if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH CRAM-MD5 command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| p = s->login.data; | |
| last = p + s->login.len; | |
| while (p < last) { | |
| if (*p++ == ' ') { | |
| s->login.len = p - s->login.data - 1; | |
| s->passwd.len = last - p; | |
| s->passwd.data = p; | |
| break; | |
| } | |
| } | |
| if (s->passwd.len != 32) { | |
| ngx_log_error(NGX_LOG_INFO, c->log, 0, | |
| "client sent invalid CRAM-MD5 hash " | |
| "in AUTH CRAM-MD5 command"); | |
| rc = NGX_MAIL_PARSE_INVALID_COMMAND; | |
| break; | |
| } | |
| ngx_log_debug2(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "smtp auth cram-md5: \"%V\" \"%V\"", | |
| &s->login, &s->passwd); | |
| s->auth_method = NGX_MAIL_AUTH_CRAM_MD5; | |
| ngx_mail_do_auth(s); | |
| return; | |
| } | |
| } | |
| if (rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
| s->mail_state = ngx_smtp_start; | |
| s->state = 0; | |
| text = smtp_invalid_command; | |
| size = sizeof(smtp_invalid_command) - 1; | |
| } | |
| s->args.nelts = 0; | |
| s->buffer->pos = s->buffer->start; | |
| s->buffer->last = s->buffer->start; | |
| if (s->state) { | |
| s->arg_start = s->buffer->start; | |
| } | |
| s->out.data = text; | |
| s->out.len = size; | |
| ngx_mail_send(c->write); | |
| } | |
| static ngx_int_t | |
| ngx_mail_decode_auth_plain(ngx_mail_session_t *s, ngx_str_t *encoded) | |
| { | |
| u_char *p, *last; | |
| ngx_str_t plain; | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| "mail auth plain: \"%V\"", encoded); | |
| #endif | |
| plain.data = ngx_palloc(s->connection->pool, | |
| ngx_base64_decoded_length(encoded->len)); | |
| if (plain.data == NULL){ | |
| return NGX_ERROR; | |
| } | |
| if (ngx_decode_base64(&plain, encoded) != NGX_OK) { | |
| ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| "client sent invalid base64 encoding " | |
| "in AUTH PLAIN command"); | |
| return NGX_MAIL_PARSE_INVALID_COMMAND; | |
| } | |
| p = plain.data; | |
| last = p + plain.len; | |
| while (p < last && *p++) { /* void */ } | |
| if (p == last) { | |
| ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| "client sent invalid login in AUTH PLAIN command"); | |
| return NGX_MAIL_PARSE_INVALID_COMMAND; | |
| } | |
| s->login.data = p; | |
| while (p < last && *p) { p++; } | |
| if (p == last) { | |
| ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| "client sent invalid password in AUTH PLAIN command"); | |
| return NGX_MAIL_PARSE_INVALID_COMMAND; | |
| } | |
| s->login.len = p++ - s->login.data; | |
| s->passwd.len = last - p; | |
| s->passwd.data = p; | |
| #if (NGX_DEBUG_MAIL_PASSWD) | |
| ngx_log_debug2(NGX_LOG_DEBUG_MAIL, s->connection->log, 0, | |
| "mail auth plain: \"%V\" \"%V\"", | |
| &s->login, &s->passwd); | |
| #endif | |
| return NGX_OK; | |
| } | |
| static void | |
| ngx_mail_do_auth(ngx_mail_session_t *s) | |
| { | |
| s->args.nelts = 0; | |
| s->buffer->pos = s->buffer->start; | |
| s->buffer->last = s->buffer->start; | |
| s->state = 0; | |
| if (s->connection->read->timer_set) { | |
| ngx_del_timer(s->connection->read); | |
| } | |
| s->login_attempt++; | |
| ngx_mail_auth_http_init(s); | |
| } | |
| static ngx_int_t | |
| ngx_mail_read_command(ngx_mail_session_t *s) | |
| { | |
| ssize_t n; | |
| ngx_int_t rc; | |
| ngx_str_t l; | |
| n = s->connection->recv(s->connection, s->buffer->last, | |
| s->buffer->end - s->buffer->last); | |
| if (n == NGX_ERROR || n == 0) { | |
| ngx_mail_close_connection(s->connection); | |
| return NGX_ERROR; | |
| } | |
| if (n > 0) { | |
| s->buffer->last += n; | |
| } | |
| if (n == NGX_AGAIN) { | |
| if (ngx_handle_read_event(s->connection->read, 0) == NGX_ERROR) { | |
| ngx_mail_session_internal_server_error(s); | |
| return NGX_ERROR; | |
| } | |
| return NGX_AGAIN; | |
| } | |
| switch (s->protocol) { | |
| case NGX_MAIL_POP3_PROTOCOL: | |
| rc = ngx_pop3_parse_command(s); | |
| break; | |
| case NGX_MAIL_IMAP_PROTOCOL: | |
| rc = ngx_imap_parse_command(s); | |
| break; | |
| default: /* NGX_MAIL_SMTP_PROTOCOL */ | |
| rc = ngx_smtp_parse_command(s); | |
| break; | |
| } | |
| if (rc == NGX_AGAIN) { | |
| if (s->buffer->last < s->buffer->end) { | |
| return rc; | |
| } | |
| l.len = s->buffer->last - s->buffer->start; | |
| l.data = s->buffer->start; | |
| ngx_log_error(NGX_LOG_INFO, s->connection->log, 0, | |
| "client sent too long command \"%V\"", &l); | |
| s->quit = 1; | |
| return NGX_MAIL_PARSE_INVALID_COMMAND; | |
| } | |
| if (rc == NGX_IMAP_NEXT || rc == NGX_MAIL_PARSE_INVALID_COMMAND) { | |
| return rc; | |
| } | |
| if (rc == NGX_ERROR) { | |
| ngx_mail_close_connection(s->connection); | |
| return NGX_ERROR; | |
| } | |
| return NGX_OK; | |
| } | |
| void | |
| ngx_mail_session_internal_server_error(ngx_mail_session_t *s) | |
| { | |
| s->out = internal_server_errors[s->protocol]; | |
| s->quit = 1; | |
| ngx_mail_send(s->connection->write); | |
| } | |
| void | |
| ngx_mail_close_connection(ngx_connection_t *c) | |
| { | |
| ngx_pool_t *pool; | |
| ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0, | |
| "close mail connection: %d", c->fd); | |
| #if (NGX_MAIL_SSL) | |
| if (c->ssl) { | |
| if (ngx_ssl_shutdown(c) == NGX_AGAIN) { | |
| c->ssl->handler = ngx_mail_close_connection; | |
| return; | |
| } | |
| } | |
| #endif | |
| c->destroyed = 1; | |
| pool = c->pool; | |
| ngx_close_connection(c); | |
| ngx_destroy_pool(pool); | |
| } | |
| static u_char * | |
| ngx_mail_log_error(ngx_log_t *log, u_char *buf, size_t len) | |
| { | |
| u_char *p; | |
| ngx_mail_session_t *s; | |
| ngx_mail_log_ctx_t *ctx; | |
| if (log->action) { | |
| p = ngx_snprintf(buf, len, " while %s", log->action); | |
| len -= p - buf; | |
| buf = p; | |
| } | |
| ctx = log->data; | |
| p = ngx_snprintf(buf, len, ", client: %V", ctx->client); | |
| len -= p - buf; | |
| buf = p; | |
| s = ctx->session; | |
| if (s == NULL) { | |
| return p; | |
| } | |
| p = ngx_snprintf(buf, len, ", server: %V", s->addr_text); | |
| len -= p - buf; | |
| buf = p; | |
| if (s->login.len == 0) { | |
| return p; | |
| } | |
| p = ngx_snprintf(buf, len, ", login: \"%V\"", &s->login); | |
| len -= p - buf; | |
| buf = p; | |
| if (s->proxy == NULL) { | |
| return p; | |
| } | |
| p = ngx_snprintf(buf, len, ", upstream: %V", s->proxy->upstream.name); | |
| return p; | |
| } |