diff options
Diffstat (limited to 'src/imap/ngx_imap_handler.c')
| -rw-r--r-- | src/imap/ngx_imap_handler.c | 1357 |
1 files changed, 0 insertions, 1357 deletions
diff --git a/src/imap/ngx_imap_handler.c b/src/imap/ngx_imap_handler.c deleted file mode 100644 index a32b10782..000000000 --- a/src/imap/ngx_imap_handler.c +++ /dev/null @@ -1,1357 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_event.h> -#include <ngx_imap.h> - - -static void ngx_imap_init_session(ngx_connection_t *c); -static void ngx_imap_init_protocol(ngx_event_t *rev); -static ngx_int_t ngx_imap_decode_auth_plain(ngx_imap_session_t *s, - ngx_str_t *encoded); -static void ngx_imap_do_auth(ngx_imap_session_t *s); -static ngx_int_t ngx_imap_read_command(ngx_imap_session_t *s); -static u_char *ngx_imap_log_error(ngx_log_t *log, u_char *buf, size_t len); - -#if (NGX_IMAP_SSL) -static void ngx_imap_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c); -static void ngx_imap_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) -}; - -static ngx_str_t internal_server_errors[] = { - ngx_string("-ERR internal server error" CRLF), - ngx_string("* BAD 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; - - -void -ngx_imap_init_connection(ngx_connection_t *c) -{ - in_addr_t in_addr; - socklen_t len; - ngx_uint_t i; - struct sockaddr_in sin; - ngx_imap_log_ctx_t *ctx; - ngx_imap_in_port_t *imip; - ngx_imap_in_addr_t *imia; - ngx_imap_session_t *s; -#if (NGX_IMAP_SSL) - ngx_imap_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_imap_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_imap_session_t)); - if (s == NULL) { - ngx_imap_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_imap_log_ctx_t)); - if (ctx == NULL) { - ngx_imap_close_connection(c); - return; - } - - ctx->client = &c->addr_text; - ctx->session = s; - - c->log->connection = c->number; - c->log->handler = ngx_imap_log_error; - c->log->data = ctx; - c->log->action = "sending client greeting line"; - - c->log_error = NGX_ERROR_INFO; - -#if (NGX_IMAP_SSL) - - sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module); - - if (sslcf->enable) { - ngx_imap_ssl_init_connection(&sslcf->ssl, c); - return; - } - -#endif - - ngx_imap_init_session(c); -} - - -#if (NGX_IMAP_SSL) - -static void -ngx_imap_starttls_handler(ngx_event_t *rev) -{ - ngx_connection_t *c; - ngx_imap_session_t *s; - ngx_imap_ssl_conf_t *sslcf; - - c = rev->data; - s = c->data; - s->starttls = 1; - - c->log->action = "in starttls state"; - - sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module); - - ngx_imap_ssl_init_connection(&sslcf->ssl, c); -} - - -static void -ngx_imap_ssl_init_connection(ngx_ssl_t *ssl, ngx_connection_t *c) -{ - ngx_imap_session_t *s; - ngx_imap_core_srv_conf_t *cscf; - - if (ngx_ssl_create_connection(ssl, c, 0) == NGX_ERROR) { - ngx_imap_close_connection(c); - return; - } - - if (ngx_ssl_handshake(c) == NGX_AGAIN) { - - s = c->data; - - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - - ngx_add_timer(c->read, cscf->timeout); - - c->ssl->handler = ngx_imap_ssl_handshake_handler; - - return; - } - - ngx_imap_ssl_handshake_handler(c); -} - - -static void -ngx_imap_ssl_handshake_handler(ngx_connection_t *c) -{ - ngx_imap_session_t *s; - - if (c->ssl->handshaked) { - - s = c->data; - - if (s->starttls) { - c->read->handler = ngx_imap_init_protocol; - c->write->handler = ngx_imap_send; - - ngx_imap_init_protocol(c->read); - - return; - } - - ngx_imap_init_session(c); - return; - } - - ngx_imap_close_connection(c); -} - -#endif - - -static void -ngx_imap_init_session(ngx_connection_t *c) -{ - u_char *p; - ngx_imap_session_t *s; - ngx_imap_core_srv_conf_t *cscf; - - c->read->handler = ngx_imap_init_protocol; - c->write->handler = ngx_imap_send; - - s = c->data; - - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - - s->protocol = cscf->protocol; - - s->ctx = ngx_pcalloc(c->pool, sizeof(void *) * ngx_imap_max_module); - if (s->ctx == NULL) { - ngx_imap_session_internal_server_error(s); - return; - } - - s->out = greetings[s->protocol]; - - if ((cscf->auth_methods & NGX_IMAP_AUTH_APOP_ENABLED) - && s->protocol == NGX_IMAP_POP3_PROTOCOL) - { - 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_imap_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; - - s->out.data = ngx_palloc(c->pool, greetings[0].len + 1 + s->salt.len); - if (s->out.data == NULL) { - ngx_imap_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_imap_close_connection(c); - } - - ngx_imap_send(c->write); -} - - -void -ngx_imap_send(ngx_event_t *wev) -{ - ngx_int_t n; - ngx_connection_t *c; - ngx_imap_session_t *s; - ngx_imap_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_imap_close_connection(c); - return; - } - - if (s->out.len == 0) { - if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { - ngx_imap_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_imap_close_connection(c); - return; - } - - if (s->blocked) { - c->read->handler(c->read); - } - - return; - } - - if (n == NGX_ERROR) { - ngx_imap_close_connection(c); - return; - } - - /* n == NGX_AGAIN */ - - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - - ngx_add_timer(c->write, cscf->timeout); - - if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) { - ngx_imap_close_connection(c); - return; - } -} - - -static void -ngx_imap_init_protocol(ngx_event_t *rev) -{ - size_t size; - ngx_connection_t *c; - ngx_imap_session_t *s; - ngx_imap_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_imap_close_connection(c); - return; - } - - s = c->data; - - if (s->protocol == NGX_IMAP_POP3_PROTOCOL) { - size = 128; - s->imap_state = ngx_pop3_start; - c->read->handler = ngx_pop3_auth_state; - - } else { - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - size = cscf->imap_client_buffer_size; - s->imap_state = ngx_imap_start; - c->read->handler = ngx_imap_auth_state; - } - - if (s->buffer == NULL) { - if (ngx_array_init(&s->args, c->pool, 2, sizeof(ngx_str_t)) - == NGX_ERROR) - { - ngx_imap_session_internal_server_error(s); - return; - } - - s->buffer = ngx_create_temp_buf(c->pool, size); - if (s->buffer == NULL) { - ngx_imap_session_internal_server_error(s); - return; - } - } - - c->read->handler(rev); -} - - -void -ngx_imap_auth_state(ngx_event_t *rev) -{ - u_char *text, *last, *p, *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_imap_session_t *s; - ngx_imap_core_srv_conf_t *cscf; -#if (NGX_IMAP_SSL) - ngx_imap_ssl_conf_t *sslcf; -#endif - - c = rev->data; - s = c->data; - - ngx_log_debug0(NGX_LOG_DEBUG_IMAP, 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_imap_close_connection(c); - return; - } - - if (s->out.len) { - ngx_log_debug0(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap send handler busy"); - s->blocked = 1; - return; - } - - s->blocked = 0; - - rc = ngx_imap_read_command(s); - - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap auth: %i", rc); - - 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_IMAP, 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_IMAP_SSL) - - if (c->ssl == NULL) { - sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module); - - if (sslcf->starttls == NGX_IMAP_STARTTLS_ONLY) { - rc = NGX_IMAP_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_imap_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_imap_session_internal_server_error(s); - return; - } - - ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); - -#if (NGX_DEBUG_IMAP_PASSWD) - ngx_log_debug2(NGX_LOG_DEBUG_IMAP, c->log, 0, - "imap login:\"%V\" passwd:\"%V\"", - &s->login, &s->passwd); -#else - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, - "imap login:\"%V\"", &s->login); -#endif - - ngx_imap_do_auth(s); - return; - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - - case NGX_IMAP_CAPABILITY: - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - -#if (NGX_IMAP_SSL) - - if (c->ssl == NULL) { - sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module); - - if (sslcf->starttls == NGX_IMAP_STARTTLS_ON) { - text_len = cscf->imap_starttls_capability.len; - text = cscf->imap_starttls_capability.data; - break; - } - - if (sslcf->starttls == NGX_IMAP_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_IMAP_SSL) - - case NGX_IMAP_STARTTLS: - if (c->ssl == NULL) { - sslcf = ngx_imap_get_module_srv_conf(s, ngx_imap_ssl_module); - if (sslcf->starttls) { - c->read->handler = ngx_imap_starttls_handler; - break; - } - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; -#endif - - default: - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - } - - } else if (rc == NGX_IMAP_NEXT) { - last = imap_next; - last_len = sizeof(imap_next) - 1; - tag = 0; - } - - if (rc == NGX_IMAP_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_imap_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_imap_send(c->write); -} - - -void -ngx_pop3_auth_state(ngx_event_t *rev) -{ - u_char *text, *p, *last; - ssize_t size; - ngx_int_t rc; - ngx_str_t *arg, salt; - ngx_connection_t *c; - ngx_imap_session_t *s; - ngx_imap_core_srv_conf_t *cscf; -#if (NGX_IMAP_SSL) - ngx_imap_ssl_conf_t *sslcf; -#endif - - c = rev->data; - s = c->data; - - ngx_log_debug0(NGX_LOG_DEBUG_IMAP, 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_imap_close_connection(c); - return; - } - - if (s->out.len) { - ngx_log_debug0(NGX_LOG_DEBUG_IMAP, c->log, 0, "imap send handler busy"); - s->blocked = 1; - return; - } - - s->blocked = 0; - - rc = ngx_imap_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->imap_state) { - - case ngx_pop3_start: - - switch (s->command) { - - case NGX_POP3_USER: - if (s->args.nelts == 1) { - s->imap_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_imap_session_internal_server_error(s); - return; - } - - ngx_memcpy(s->login.data, arg[0].data, s->login.len); - - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, - "pop3 login: \"%V\"", &s->login); - - break; - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - - case NGX_POP3_CAPA: - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - -#if (NGX_IMAP_SSL) - - if (c->ssl == NULL) { - sslcf = ngx_imap_get_module_srv_conf(s, - ngx_imap_ssl_module); - if (sslcf->starttls) { - size = cscf->pop3_starttls_capability.len; - text = cscf->pop3_starttls_capability.data; - break; - } - } -#endif - - size = cscf->pop3_capability.len; - text = cscf->pop3_capability.data; - break; - - case NGX_POP3_APOP: - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_core_module); - - if ((cscf->auth_methods & NGX_IMAP_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_imap_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_imap_session_internal_server_error(s); - return; - } - - ngx_memcpy(s->passwd.data, arg[1].data, s->passwd.len); - - ngx_log_debug2(NGX_LOG_DEBUG_IMAP, c->log, 0, - "pop3 apop: \"%V\" \"%V\"", - &s->login, &s->passwd); - - s->auth_method = NGX_IMAP_AUTH_APOP; - - ngx_imap_do_auth(s); - return; - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - - case NGX_POP3_AUTH: - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_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_IMAP_PARSE_INVALID_COMMAND; - break; - } - - s->imap_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->imap_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_imap_decode_auth_plain(s, &arg[1]); - - if (rc == NGX_OK) { - ngx_imap_do_auth(s); - return; - } - - if (rc == NGX_ERROR) { - ngx_imap_session_internal_server_error(s); - return; - } - - /* rc == NGX_IMAP_PARSE_INVALID_COMMAND */ - - break; - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - } - - } else if (arg[0].len == 8 - && ngx_strncasecmp(arg[0].data, - (u_char *) "CRAM-MD5", 8) - == 0) - { - s->imap_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_imap_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_IMAP_PARSE_INVALID_COMMAND; - break; - - case NGX_POP3_QUIT: - s->quit = 1; - break; - - case NGX_POP3_NOOP: - break; - -#if (NGX_IMAP_SSL) - - case NGX_POP3_STLS: - if (c->ssl == NULL) { - sslcf = ngx_imap_get_module_srv_conf(s, - ngx_imap_ssl_module); - if (sslcf->starttls) { - c->read->handler = ngx_imap_starttls_handler; - break; - } - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; -#endif - - default: - s->imap_state = ngx_pop3_start; - rc = NGX_IMAP_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_imap_session_internal_server_error(s); - return; - } - - ngx_memcpy(s->passwd.data, arg[0].data, s->passwd.len); - -#if (NGX_DEBUG_IMAP_PASSWD) - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, - "pop3 passwd: \"%V\"", &s->passwd); -#endif - - ngx_imap_do_auth(s); - return; - } - - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - - case NGX_POP3_CAPA: - cscf = ngx_imap_get_module_srv_conf(s, ngx_imap_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->imap_state = ngx_pop3_start; - rc = NGX_IMAP_PARSE_INVALID_COMMAND; - break; - } - - break; - - /* suppress warinings */ - case ngx_pop3_passwd: - break; - - case ngx_pop3_auth_login_username: - arg = s->args.elts; - s->imap_state = ngx_pop3_auth_login_password; - - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, 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_imap_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_IMAP_PARSE_INVALID_COMMAND; - break; - } - - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, 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_IMAP_PASSWD) - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, 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_imap_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_IMAP_PARSE_INVALID_COMMAND; - break; - } - -#if (NGX_DEBUG_IMAP_PASSWD) - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, - "pop3 auth login password: \"%V\"", &s->passwd); -#endif - - ngx_imap_do_auth(s); - return; - - case ngx_pop3_auth_plain: - arg = s->args.elts; - - rc = ngx_imap_decode_auth_plain(s, &arg[0]); - - if (rc == NGX_OK) { - ngx_imap_do_auth(s); - return; - } - - if (rc == NGX_ERROR) { - ngx_imap_session_internal_server_error(s); - return; - } - - /* rc == NGX_IMAP_PARSE_INVALID_COMMAND */ - - break; - - case ngx_pop3_auth_cram_md5: - arg = s->args.elts; - - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, 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_imap_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_IMAP_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_IMAP_PARSE_INVALID_COMMAND; - break; - } - - ngx_log_debug2(NGX_LOG_DEBUG_IMAP, c->log, 0, - "pop3 auth cram-md5: \"%V\" \"%V\"", - &s->login, &s->passwd); - - s->auth_method = NGX_IMAP_AUTH_CRAM_MD5; - - ngx_imap_do_auth(s); - return; - } - } - - if (rc == NGX_IMAP_PARSE_INVALID_COMMAND) { - s->imap_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_imap_send(c->write); -} - - -static ngx_int_t -ngx_imap_decode_auth_plain(ngx_imap_session_t *s, ngx_str_t *encoded) -{ - u_char *p, *last; - ngx_str_t plain; - -#if (NGX_DEBUG_IMAP_PASSWD) - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, - "pop3 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_IMAP_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_IMAP_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_IMAP_PARSE_INVALID_COMMAND; - } - - s->login.len = p++ - s->login.data; - - s->passwd.len = last - p; - s->passwd.data = p; - -#if (NGX_DEBUG_IMAP_PASSWD) - ngx_log_debug2(NGX_LOG_DEBUG_IMAP, s->connection->log, 0, - "pop3 auth plain: \"%V\" \"%V\"", - &s->login, &s->passwd); -#endif - - return NGX_OK; -} - - -static void -ngx_imap_do_auth(ngx_imap_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_imap_auth_http_init(s); -} - - -static ngx_int_t -ngx_imap_read_command(ngx_imap_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_imap_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_imap_session_internal_server_error(s); - return NGX_ERROR; - } - - return NGX_AGAIN; - } - - if (s->protocol == NGX_IMAP_POP3_PROTOCOL) { - rc = ngx_pop3_parse_command(s); - } else { - rc = ngx_imap_parse_command(s); - } - - 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_IMAP_PARSE_INVALID_COMMAND; - } - - if (rc == NGX_IMAP_NEXT || rc == NGX_IMAP_PARSE_INVALID_COMMAND) { - return rc; - } - - if (rc == NGX_ERROR) { - ngx_imap_close_connection(s->connection); - return NGX_ERROR; - } - - return NGX_OK; -} - - -void -ngx_imap_session_internal_server_error(ngx_imap_session_t *s) -{ - s->out = internal_server_errors[s->protocol]; - s->quit = 1; - - ngx_imap_send(s->connection->write); -} - - -void -ngx_imap_close_connection(ngx_connection_t *c) -{ - ngx_pool_t *pool; - - ngx_log_debug1(NGX_LOG_DEBUG_IMAP, c->log, 0, - "close imap connection: %d", c->fd); - -#if (NGX_IMAP_SSL) - - if (c->ssl) { - if (ngx_ssl_shutdown(c) == NGX_AGAIN) { - c->ssl->handler = ngx_imap_close_connection; - return; - } - } - -#endif - - c->destroyed = 1; - - pool = c->pool; - - ngx_close_connection(c); - - ngx_destroy_pool(pool); -} - - -static u_char * -ngx_imap_log_error(ngx_log_t *log, u_char *buf, size_t len) -{ - u_char *p; - ngx_imap_session_t *s; - ngx_imap_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; -} |