1 /** @file
2 
3   A brief file description
4 
5   @section license License
6 
7   Licensed to the Apache Software Foundation (ASF) under one
8   or more contributor license agreements.  See the NOTICE file
9   distributed with this work for additional information
10   regarding copyright ownership.  The ASF licenses this file
11   to you under the Apache License, Version 2.0 (the
12   "License"); you may not use this file except in compliance
13   with the License.  You may obtain a copy of the License at
14 
15       http://www.apache.org/licenses/LICENSE-2.0
16 
17   Unless required by applicable law or agreed to in writing, software
18   distributed under the License is distributed on an "AS IS" BASIS,
19   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20   See the License for the specific language governing permissions and
21   limitations under the License.
22  */
23 
24 #pragma once
25 
26 /*
27  * Base64 encoding and decoding as according to RFC1521.  Similar to uudecode.
28  * See RFC1521 for specification.
29  *
30  * RFC 1521 requires inserting line breaks for long lines.  The basic web
31  * authentication scheme does not require them.  This implementation is
32  * intended for web-related use, and line breaks are not implemented.
33  *
34  * These routines return char*'s to malloc-ed strings.  The caller is
35  * responsible for freeing the strings.
36  *
37  */
38 // Encodes / Decodes into user supplied buffer.  Returns number of bytes decoded
39 bool ats_base64_encode(const char *inBuffer, size_t inBufferSize, char *outBuffer, size_t outBufSize, size_t *length);
40 bool ats_base64_encode(const unsigned char *inBuffer, size_t inBufferSize, char *outBuffer, size_t outBufSize, size_t *length);
41 
42 bool ats_base64_decode(const char *inBuffer, size_t inBufferSize, unsigned char *outBuffer, size_t outBufSize, size_t *length);
43 
44 // Little helper functions to calculate minimum required output buffer for encoding/decoding.
45 #define ATS_BASE64_ENCODE_DSTLEN(_length) ((_length * 8) / 6 + 4)
46 #define ATS_BASE64_DECODE_DSTLEN(_length) (((_length + 3) / 4) * 3)
47