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-rw-r--r--libraries/libldap/fetch.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/libraries/libldap/fetch.c b/libraries/libldap/fetch.c
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+/* fetch.c - routines for fetching data at URLs */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1999-2021 The OpenLDAP Foundation.
+ * Portions Copyright 1999-2003 Kurt D. Zeilenga.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* This work was initially developed by Kurt D. Zeilenga for
+ * inclusion in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/stdlib.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+#include <ac/time.h>
+
+#ifdef HAVE_FETCH
+#include <fetch.h>
+#endif
+
+#include "lber_pvt.h"
+#include "ldap_pvt.h"
+#include "ldap_config.h"
+#include "ldif.h"
+
+FILE *
+ldif_open_url(
+ LDAP_CONST char *urlstr )
+{
+ FILE *url;
+
+ if( strncasecmp( "file:", urlstr, sizeof("file:")-1 ) == 0 ) {
+ char *p;
+ urlstr += sizeof("file:")-1;
+
+ /* we don't check for LDAP_DIRSEP since URLs should contain '/' */
+ if ( urlstr[0] == '/' && urlstr[1] == '/' ) {
+ urlstr += 2;
+ /* path must be absolute if authority is present
+ * technically, file://hostname/path is also legal but we don't
+ * accept a non-empty hostname
+ */
+ if ( urlstr[0] != '/' ) {
+#ifdef _WIN32
+ /* An absolute path in improper file://C:/foo/bar format */
+ if ( urlstr[1] != ':' )
+#endif
+ return NULL;
+ }
+#ifdef _WIN32
+ /* An absolute path in proper file:///C:/foo/bar format */
+ if ( urlstr[2] == ':' )
+ urlstr++;
+#endif
+ }
+
+ p = ber_strdup( urlstr );
+
+ /* But we should convert to LDAP_DIRSEP before use */
+ if ( LDAP_DIRSEP[0] != '/' ) {
+ char *s = p;
+ while (( s = strchr( s, '/' )))
+ *s++ = LDAP_DIRSEP[0];
+ }
+
+ ldap_pvt_hex_unescape( p );
+
+ url = fopen( p, "rb" );
+
+ ber_memfree( p );
+ } else {
+#ifdef HAVE_FETCH
+ url = fetchGetURL( (char*) urlstr, "" );
+#else
+ url = NULL;
+#endif
+ }
+ return url;
+}
+
+int
+ldif_fetch_url(
+ LDAP_CONST char *urlstr,
+ char **valuep,
+ ber_len_t *vlenp )
+{
+ FILE *url;
+ char buffer[1024];
+ char *p = NULL;
+ size_t total;
+ size_t bytes;
+
+ *valuep = NULL;
+ *vlenp = 0;
+
+ url = ldif_open_url( urlstr );
+
+ if( url == NULL ) {
+ return -1;
+ }
+
+ total = 0;
+
+ while( (bytes = fread( buffer, 1, sizeof(buffer), url )) != 0 ) {
+ char *newp = ber_memrealloc( p, total + bytes + 1 );
+ if( newp == NULL ) {
+ ber_memfree( p );
+ fclose( url );
+ return -1;
+ }
+ p = newp;
+ AC_MEMCPY( &p[total], buffer, bytes );
+ total += bytes;
+ }
+
+ fclose( url );
+
+ if( total == 0 ) {
+ char *newp = ber_memrealloc( p, 1 );
+ if( newp == NULL ) {
+ ber_memfree( p );
+ return -1;
+ }
+ p = newp;
+ }
+
+ p[total] = '\0';
+ *valuep = p;
+ *vlenp = total;
+
+ return 0;
+}