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-rw-r--r--app/nginx/src/mail/ngx_mail_imap_module.c257
1 files changed, 257 insertions, 0 deletions
diff --git a/app/nginx/src/mail/ngx_mail_imap_module.c b/app/nginx/src/mail/ngx_mail_imap_module.c
new file mode 100644
index 0000000..1f187fd
--- /dev/null
+++ b/app/nginx/src/mail/ngx_mail_imap_module.c
@@ -0,0 +1,257 @@
+
+/*
+ * 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 void *ngx_mail_imap_create_srv_conf(ngx_conf_t *cf);
+static char *ngx_mail_imap_merge_srv_conf(ngx_conf_t *cf, void *parent,
+ void *child);
+
+
+static ngx_str_t ngx_mail_imap_default_capabilities[] = {
+ ngx_string("IMAP4"),
+ ngx_string("IMAP4rev1"),
+ ngx_string("UIDPLUS"),
+ ngx_null_string
+};
+
+
+static ngx_conf_bitmask_t ngx_mail_imap_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_null_string, 0 }
+};
+
+
+static ngx_str_t ngx_mail_imap_auth_methods_names[] = {
+ ngx_string("AUTH=PLAIN"),
+ ngx_string("AUTH=LOGIN"),
+ ngx_null_string, /* APOP */
+ ngx_string("AUTH=CRAM-MD5"),
+ ngx_string("AUTH=EXTERNAL"),
+ ngx_null_string /* NONE */
+};
+
+
+static ngx_mail_protocol_t ngx_mail_imap_protocol = {
+ ngx_string("imap"),
+ { 143, 993, 0, 0 },
+ NGX_MAIL_IMAP_PROTOCOL,
+
+ ngx_mail_imap_init_session,
+ ngx_mail_imap_init_protocol,
+ ngx_mail_imap_parse_command,
+ ngx_mail_imap_auth_state,
+
+ ngx_string("* BAD internal server error" CRLF),
+ ngx_string("* BYE SSL certificate error" CRLF),
+ ngx_string("* BYE No required SSL certificate" CRLF)
+};
+
+
+static ngx_command_t ngx_mail_imap_commands[] = {
+
+ { ngx_string("imap_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_imap_srv_conf_t, client_buffer_size),
+ NULL },
+
+ { ngx_string("imap_capabilities"),
+ NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+ ngx_mail_capabilities,
+ NGX_MAIL_SRV_CONF_OFFSET,
+ offsetof(ngx_mail_imap_srv_conf_t, capabilities),
+ NULL },
+
+ { ngx_string("imap_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_imap_srv_conf_t, auth_methods),
+ &ngx_mail_imap_auth_methods },
+
+ ngx_null_command
+};
+
+
+static ngx_mail_module_t ngx_mail_imap_module_ctx = {
+ &ngx_mail_imap_protocol, /* protocol */
+
+ NULL, /* create main configuration */
+ NULL, /* init main configuration */
+
+ ngx_mail_imap_create_srv_conf, /* create server configuration */
+ ngx_mail_imap_merge_srv_conf /* merge server configuration */
+};
+
+
+ngx_module_t ngx_mail_imap_module = {
+ NGX_MODULE_V1,
+ &ngx_mail_imap_module_ctx, /* module context */
+ ngx_mail_imap_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_imap_create_srv_conf(ngx_conf_t *cf)
+{
+ ngx_mail_imap_srv_conf_t *iscf;
+
+ iscf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_imap_srv_conf_t));
+ if (iscf == NULL) {
+ return NULL;
+ }
+
+ iscf->client_buffer_size = NGX_CONF_UNSET_SIZE;
+
+ if (ngx_array_init(&iscf->capabilities, cf->pool, 4, sizeof(ngx_str_t))
+ != NGX_OK)
+ {
+ return NULL;
+ }
+
+ return iscf;
+}
+
+
+static char *
+ngx_mail_imap_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+ ngx_mail_imap_srv_conf_t *prev = parent;
+ ngx_mail_imap_srv_conf_t *conf = child;
+
+ u_char *p, *auth;
+ size_t size;
+ ngx_str_t *c, *d;
+ ngx_uint_t i, m;
+
+ ngx_conf_merge_size_value(conf->client_buffer_size,
+ prev->client_buffer_size,
+ (size_t) ngx_pagesize);
+
+ ngx_conf_merge_bitmask_value(conf->auth_methods,
+ prev->auth_methods,
+ (NGX_CONF_BITMASK_SET
+ |NGX_MAIL_AUTH_PLAIN_ENABLED));
+
+
+ if (conf->capabilities.nelts == 0) {
+ conf->capabilities = prev->capabilities;
+ }
+
+ if (conf->capabilities.nelts == 0) {
+
+ for (d = ngx_mail_imap_default_capabilities; d->len; d++) {
+ c = ngx_array_push(&conf->capabilities);
+ if (c == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ *c = *d;
+ }
+ }
+
+ size = sizeof("* CAPABILITY" CRLF) - 1;
+
+ c = conf->capabilities.elts;
+ for (i = 0; i < conf->capabilities.nelts; i++) {
+ size += 1 + c[i].len;
+ }
+
+ 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_imap_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, "* CAPABILITY", sizeof("* CAPABILITY") - 1);
+
+ for (i = 0; i < conf->capabilities.nelts; i++) {
+ *p++ = ' ';
+ p = ngx_cpymem(p, c[i].data, c[i].len);
+ }
+
+ auth = p;
+
+ 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_imap_auth_methods_names[i].data,
+ ngx_mail_imap_auth_methods_names[i].len);
+ }
+ }
+
+ *p++ = CR; *p = LF;
+
+
+ size += sizeof(" STARTTLS") - 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, " STARTTLS", sizeof(" STARTTLS") - 1);
+ *p++ = CR; *p = LF;
+
+
+ size = (auth - conf->capability.data) + sizeof(CRLF) - 1
+ + sizeof(" STARTTLS LOGINDISABLED") - 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);
+ p = ngx_cpymem(p, " STARTTLS LOGINDISABLED",
+ sizeof(" STARTTLS LOGINDISABLED") - 1);
+ *p++ = CR; *p = LF;
+
+ return NGX_CONF_OK;
+}