1 /**
2  * \file base64_internal.h
3  *
4  * \brief RFC 1521 base64 encoding/decoding: interfaces for invasive testing
5  */
6 /*
7  *  Copyright The Mbed TLS Contributors
8  *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
9  */
10 
11 #ifndef MBEDTLS_BASE64_INTERNAL
12 #define MBEDTLS_BASE64_INTERNAL
13 
14 #include "common.h"
15 
16 #if defined(MBEDTLS_TEST_HOOKS)
17 
18 /** Given a value in the range 0..63, return the corresponding Base64 digit.
19  *
20  * The implementation assumes that letters are consecutive (e.g. ASCII
21  * but not EBCDIC).
22  *
23  * \param value     A value in the range 0..63.
24  *
25  * \return          A base64 digit converted from \p value.
26  */
27 unsigned char mbedtls_ct_base64_enc_char(unsigned char value);
28 
29 /** Given a Base64 digit, return its value.
30  *
31  * If c is not a Base64 digit ('A'..'Z', 'a'..'z', '0'..'9', '+' or '/'),
32  * return -1.
33  *
34  * The implementation assumes that letters are consecutive (e.g. ASCII
35  * but not EBCDIC).
36  *
37  * \param c     A base64 digit.
38  *
39  * \return      The value of the base64 digit \p c.
40  */
41 signed char mbedtls_ct_base64_dec_value(unsigned char c);
42 
43 #endif /* MBEDTLS_TEST_HOOKS */
44 
45 #endif /* MBEDTLS_BASE64_INTERNAL */
46