diff options
Diffstat (limited to 'app/nginx/src/mail/ngx_mail_imap_handler.c')
| -rw-r--r-- | app/nginx/src/mail/ngx_mail_imap_handler.c | 472 |
1 files changed, 0 insertions, 472 deletions
diff --git a/app/nginx/src/mail/ngx_mail_imap_handler.c b/app/nginx/src/mail/ngx_mail_imap_handler.c deleted file mode 100644 index 3bf09ec..0000000 --- a/app/nginx/src/mail/ngx_mail_imap_handler.c +++ /dev/null @@ -1,472 +0,0 @@ - -/* - * 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_imap_module.h> - - -static ngx_int_t ngx_mail_imap_login(ngx_mail_session_t *s, - ngx_connection_t *c); -static ngx_int_t ngx_mail_imap_authenticate(ngx_mail_session_t *s, - ngx_connection_t *c); -static ngx_int_t ngx_mail_imap_capability(ngx_mail_session_t *s, - ngx_connection_t *c); -static ngx_int_t ngx_mail_imap_starttls(ngx_mail_session_t *s, - ngx_connection_t *c); - - -static u_char imap_greeting[] = "* OK IMAP4 ready" 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_plain_next[] = "+ " CRLF; -static u_char imap_username[] = "+ VXNlcm5hbWU6" CRLF; -static u_char imap_password[] = "+ UGFzc3dvcmQ6" CRLF; -static u_char imap_bye[] = "* BYE" CRLF; -static u_char imap_invalid_command[] = "BAD invalid command" CRLF; - - -void -ngx_mail_imap_init_session(ngx_mail_session_t *s, ngx_connection_t *c) -{ - ngx_mail_core_srv_conf_t *cscf; - - cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); - - ngx_str_set(&s->out, imap_greeting); - - c->read->handler = ngx_mail_imap_init_protocol; - - ngx_add_timer(c->read, cscf->timeout); - - if (ngx_handle_read_event(c->read, 0) != NGX_OK) { - ngx_mail_close_connection(c); - } - - ngx_mail_send(c->write); -} - - -void -ngx_mail_imap_init_protocol(ngx_event_t *rev) -{ - ngx_connection_t *c; - ngx_mail_session_t *s; - ngx_mail_imap_srv_conf_t *iscf; - - 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; - - 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; - } - - iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); - - s->buffer = ngx_create_temp_buf(c->pool, iscf->client_buffer_size); - if (s->buffer == NULL) { - ngx_mail_session_internal_server_error(s); - return; - } - } - - s->mail_state = ngx_imap_start; - c->read->handler = ngx_mail_imap_auth_state; - - ngx_mail_imap_auth_state(rev); -} - - -void -ngx_mail_imap_auth_state(ngx_event_t *rev) -{ - u_char *p, *dst, *src, *end; - ngx_str_t *arg; - ngx_int_t rc; - ngx_uint_t tag, i; - ngx_connection_t *c; - ngx_mail_session_t *s; - - 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, c); - - if (rc == NGX_AGAIN || rc == NGX_ERROR) { - return; - } - - tag = 1; - s->text.len = 0; - ngx_str_set(&s->out, imap_ok); - - 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->mail_state) { - - case ngx_imap_start: - - switch (s->command) { - - case NGX_IMAP_LOGIN: - rc = ngx_mail_imap_login(s, c); - break; - - case NGX_IMAP_AUTHENTICATE: - rc = ngx_mail_imap_authenticate(s, c); - tag = (rc != NGX_OK); - break; - - case NGX_IMAP_CAPABILITY: - rc = ngx_mail_imap_capability(s, c); - break; - - case NGX_IMAP_LOGOUT: - s->quit = 1; - ngx_str_set(&s->text, imap_bye); - break; - - case NGX_IMAP_NOOP: - break; - - case NGX_IMAP_STARTTLS: - rc = ngx_mail_imap_starttls(s, c); - break; - - default: - rc = NGX_MAIL_PARSE_INVALID_COMMAND; - break; - } - - break; - - case ngx_imap_auth_login_username: - rc = ngx_mail_auth_login_username(s, c, 0); - - tag = 0; - ngx_str_set(&s->out, imap_password); - s->mail_state = ngx_imap_auth_login_password; - - break; - - case ngx_imap_auth_login_password: - rc = ngx_mail_auth_login_password(s, c); - break; - - case ngx_imap_auth_plain: - rc = ngx_mail_auth_plain(s, c, 0); - break; - - case ngx_imap_auth_cram_md5: - rc = ngx_mail_auth_cram_md5(s, c); - break; - - case ngx_imap_auth_external: - rc = ngx_mail_auth_external(s, c, 0); - break; - } - - } else if (rc == NGX_IMAP_NEXT) { - tag = 0; - ngx_str_set(&s->out, imap_next); - } - - switch (rc) { - - case NGX_DONE: - ngx_mail_auth(s, c); - return; - - case NGX_ERROR: - ngx_mail_session_internal_server_error(s); - return; - - case NGX_MAIL_PARSE_INVALID_COMMAND: - s->state = 0; - ngx_str_set(&s->out, imap_invalid_command); - s->mail_state = ngx_imap_start; - break; - } - - if (tag) { - if (s->tag.len == 0) { - ngx_str_set(&s->tag, imap_star); - } - - if (s->tagged_line.len < s->tag.len + s->text.len + s->out.len) { - s->tagged_line.len = s->tag.len + s->text.len + s->out.len; - s->tagged_line.data = ngx_pnalloc(c->pool, s->tagged_line.len); - if (s->tagged_line.data == NULL) { - ngx_mail_close_connection(c); - return; - } - } - - p = s->tagged_line.data; - - if (s->text.len) { - p = ngx_cpymem(p, s->text.data, s->text.len); - } - - p = ngx_cpymem(p, s->tag.data, s->tag.len); - ngx_memcpy(p, s->out.data, s->out.len); - - s->out.len = s->text.len + s->tag.len + s->out.len; - s->out.data = s->tagged_line.data; - } - - if (rc != NGX_IMAP_NEXT) { - s->args.nelts = 0; - - if (s->state) { - /* preserve tag */ - s->arg_start = s->buffer->start + s->tag.len; - s->buffer->pos = s->arg_start; - s->buffer->last = s->arg_start; - - } else { - s->buffer->pos = s->buffer->start; - s->buffer->last = s->buffer->start; - s->tag.len = 0; - } - } - - ngx_mail_send(c->write); -} - - -static ngx_int_t -ngx_mail_imap_login(ngx_mail_session_t *s, ngx_connection_t *c) -{ - ngx_str_t *arg; - -#if (NGX_MAIL_SSL) - if (ngx_mail_starttls_only(s, c)) { - return NGX_MAIL_PARSE_INVALID_COMMAND; - } -#endif - - arg = s->args.elts; - - if (s->args.nelts != 2 || arg[0].len == 0) { - return NGX_MAIL_PARSE_INVALID_COMMAND; - } - - s->login.len = arg[0].len; - s->login.data = ngx_pnalloc(c->pool, s->login.len); - if (s->login.data == NULL) { - return NGX_ERROR; - } - - ngx_memcpy(s->login.data, arg[0].data, s->login.len); - - s->passwd.len = arg[1].len; - s->passwd.data = ngx_pnalloc(c->pool, s->passwd.len); - if (s->passwd.data == NULL) { - return NGX_ERROR; - } - - 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 - - return NGX_DONE; -} - - -static ngx_int_t -ngx_mail_imap_authenticate(ngx_mail_session_t *s, ngx_connection_t *c) -{ - ngx_int_t rc; - ngx_mail_core_srv_conf_t *cscf; - ngx_mail_imap_srv_conf_t *iscf; - -#if (NGX_MAIL_SSL) - if (ngx_mail_starttls_only(s, c)) { - return NGX_MAIL_PARSE_INVALID_COMMAND; - } -#endif - - iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); - - rc = ngx_mail_auth_parse(s, c); - - switch (rc) { - - case NGX_MAIL_AUTH_LOGIN: - - ngx_str_set(&s->out, imap_username); - s->mail_state = ngx_imap_auth_login_username; - - return NGX_OK; - - case NGX_MAIL_AUTH_LOGIN_USERNAME: - - ngx_str_set(&s->out, imap_password); - s->mail_state = ngx_imap_auth_login_password; - - return ngx_mail_auth_login_username(s, c, 1); - - case NGX_MAIL_AUTH_PLAIN: - - ngx_str_set(&s->out, imap_plain_next); - s->mail_state = ngx_imap_auth_plain; - - return NGX_OK; - - case NGX_MAIL_AUTH_CRAM_MD5: - - if (!(iscf->auth_methods & NGX_MAIL_AUTH_CRAM_MD5_ENABLED)) { - return NGX_MAIL_PARSE_INVALID_COMMAND; - } - - if (s->salt.data == NULL) { - cscf = ngx_mail_get_module_srv_conf(s, ngx_mail_core_module); - - if (ngx_mail_salt(s, c, cscf) != NGX_OK) { - return NGX_ERROR; - } - } - - if (ngx_mail_auth_cram_md5_salt(s, c, "+ ", 2) == NGX_OK) { - s->mail_state = ngx_imap_auth_cram_md5; - return NGX_OK; - } - - return NGX_ERROR; - - case NGX_MAIL_AUTH_EXTERNAL: - - if (!(iscf->auth_methods & NGX_MAIL_AUTH_EXTERNAL_ENABLED)) { - return NGX_MAIL_PARSE_INVALID_COMMAND; - } - - ngx_str_set(&s->out, imap_username); - s->mail_state = ngx_imap_auth_external; - - return NGX_OK; - } - - return rc; -} - - -static ngx_int_t -ngx_mail_imap_capability(ngx_mail_session_t *s, ngx_connection_t *c) -{ - ngx_mail_imap_srv_conf_t *iscf; - - iscf = ngx_mail_get_module_srv_conf(s, ngx_mail_imap_module); - -#if (NGX_MAIL_SSL) - - if (c->ssl == NULL) { - ngx_mail_ssl_conf_t *sslcf; - - sslcf = ngx_mail_get_module_srv_conf(s, ngx_mail_ssl_module); - - if (sslcf->starttls == NGX_MAIL_STARTTLS_ON) { - s->text = iscf->starttls_capability; - return NGX_OK; - } - - if (sslcf->starttls == NGX_MAIL_STARTTLS_ONLY) { - s->text = iscf->starttls_only_capability; - return NGX_OK; - } - } -#endif - - s->text = iscf->capability; - - return NGX_OK; -} - - -static ngx_int_t -ngx_mail_imap_starttls(ngx_mail_session_t *s, ngx_connection_t *c) -{ -#if (NGX_MAIL_SSL) - ngx_mail_ssl_conf_t *sslcf; - - 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; - return NGX_OK; - } - } - -#endif - - return NGX_MAIL_PARSE_INVALID_COMMAND; -} |