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1 /*
2  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
3  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
4  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met:
9  *
10  *     * Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *     * Redistributions in binary form must reproduce the above
13  * copyright notice, this list of conditions and the following disclaimer
14  * in the documentation and/or other materials provided with the
15  * distribution.
16  *     * Neither the name of Google Inc. nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include "config.h"
34 #include "core/frame/DOMWindowBase64.h"
35 
36 #include "bindings/core/v8/ExceptionState.h"
37 #include "core/dom/ExceptionCode.h"
38 #include "core/html/parser/HTMLParserIdioms.h"
39 #include "wtf/text/Base64.h"
40 
41 namespace blink {
42 
btoa(const String & stringToEncode,ExceptionState & exceptionState)43 String DOMWindowBase64::btoa(const String& stringToEncode, ExceptionState& exceptionState)
44 {
45     if (stringToEncode.isNull())
46         return String();
47 
48     if (!stringToEncode.containsOnlyLatin1()) {
49         exceptionState.throwDOMException(InvalidCharacterError, "The string to be encoded contains characters outside of the Latin1 range.");
50         return String();
51     }
52 
53     return base64Encode(stringToEncode.latin1());
54 }
55 
atob(const String & encodedString,ExceptionState & exceptionState)56 String DOMWindowBase64::atob(const String& encodedString, ExceptionState& exceptionState)
57 {
58     if (encodedString.isNull())
59         return String();
60 
61     if (!encodedString.containsOnlyLatin1()) {
62         exceptionState.throwDOMException(InvalidCharacterError, "The string to be decoded contains characters outside of the Latin1 range.");
63         return String();
64     }
65     Vector<char> out;
66     if (!base64Decode(encodedString, out, isHTMLSpace<UChar>, Base64ValidatePadding)) {
67         exceptionState.throwDOMException(InvalidCharacterError, "The string to be decoded is not correctly encoded.");
68         return String();
69     }
70 
71     return String(out.data(), out.size());
72 }
73 
74 } // namespace blink
75