Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -41,10 +41,11 @@
        OFURL.m			\
        OFXMLAttribute.m		\
        OFXMLElement.m		\
        OFXMLElementBuilder.m	\
        OFXMLParser.m		\
+       base64.m			\
        of_asprintf.m		\
        unicode.m
 
 INCLUDES := ${SRCS:.m=.h}	\
 	    OFCollection.h	\

Index: src/OFDataArray.h
==================================================================
--- src/OFDataArray.h
+++ src/OFDataArray.h
@@ -160,10 +160,15 @@
  * \param nitems The number of items to remove
  * \param index The index at which the items are removed
  */
 - (void)removeNItems: (size_t)nitems
 	     atIndex: (size_t)index;
+
+/**
+ * \return A string containing the data in Base64 encoding
+ */
+- (OFString*)stringByBase64Encoding;
 @end
 
 /**
  * \brief A class for storing arbitrary big data in an array.
  *

Index: src/OFDataArray.m
==================================================================
--- src/OFDataArray.m
+++ src/OFDataArray.m
@@ -22,10 +22,11 @@
 
 #import "OFDataArray.h"
 #import "OFString.h"
 #import "OFFile.h"
 #import "OFExceptions.h"
+#import "base64.h"
 #import "macros.h"
 
 /* References for static linking */
 void _references_to_categories_of_OFDataArray()
 {
@@ -301,10 +302,15 @@
 		OF_HASH_ADD(hash, ((char*)data)[i]);
 	OF_HASH_FINALIZE(hash);
 
 	return hash;
 }
+
+- (OFString*)stringByBase64Encoding
+{
+	return of_base64_encode(data, count * itemSize);
+}
 @end
 
 @implementation OFBigDataArray
 - (void)addItem: (void*)item
 {

Index: src/ObjFW.h
==================================================================
--- src/ObjFW.h
+++ src/ObjFW.h
@@ -66,6 +66,7 @@
 # import "OFThread.h"
 # import "threading.h"
 #endif
 
 #import "asprintf.h"
+#import "base64.h"
 #import "of_asprintf.h"

ADDED   src/base64.h
Index: src/base64.h
==================================================================
--- src/base64.h
+++ src/base64.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011
+ *   Jonathan Schleifer <js@webkeks.org>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include <stddef.h>
+
+@class OFString;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern const char of_base64_table[64];
+extern OFString *of_base64_encode(const char *buf, size_t len);
+#ifdef __cplusplus
+}
+#endif

ADDED   src/base64.m
Index: src/base64.m
==================================================================
--- src/base64.m
+++ src/base64.m
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011
+ *   Jonathan Schleifer <js@webkeks.org>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include "config.h"
+
+#import "OFString.h"
+#import "base64.h"
+
+const char of_base64_table[64] = {
+	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
+	'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b',
+	'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+	'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3',
+	'4', '5', '6', '7', '8', '9', '+', '/'
+};
+
+OFString*
+of_base64_encode(const char *buf, size_t len)
+{
+	OFMutableString *ret = [OFMutableString string];
+	size_t i, rest;
+	char tb[4];
+	uint32_t sb;
+
+	rest = len % 3;
+
+	for (i = 0; i < len - rest; i += 3) {
+		sb = (buf[i] << 16) | (buf[i + 1] << 8) | buf[i + 2];
+
+		tb[0] = of_base64_table[(sb & 0xFC0000) >> 18];
+		tb[1] = of_base64_table[(sb & 0x03F000) >> 12];
+		tb[2] = of_base64_table[(sb & 0x000FC0) >> 6];
+		tb[3] = of_base64_table[(sb & 0x00003F)];
+
+		[ret appendCStringWithoutUTF8Checking: tb
+					       length: 4];
+	}
+
+	switch (rest) {
+	case 1:;
+		tb[0] = of_base64_table[buf[i] >> 2];
+		tb[1] = of_base64_table[(buf[i] & 3) << 4];
+		tb[2] = tb[3] = '=';
+
+		[ret appendCStringWithoutUTF8Checking: tb
+					       length: 4];
+
+		break;
+	case 2:;
+		sb = (buf[i] << 16) | (buf[i + 1] << 8);
+
+		tb[0] = of_base64_table[(sb & 0xFC0000) >> 18];
+		tb[1] = of_base64_table[(sb & 0x03F000) >> 12];
+		tb[2] = of_base64_table[(sb & 0x000FC0) >> 6];
+		tb[3] = '=';
+
+		[ret appendCStringWithoutUTF8Checking: tb
+					       length: 4];
+
+		break;
+	}
+
+	return ret;
+}