gsasl  1.10.0
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base64.h
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1 /* base64.h -- Encode binary data using printable characters.
2  Copyright (C) 2004-2006, 2009-2021 Free Software Foundation, Inc.
3  Written by Simon Josefsson.
4 
5  This program is free software; you can redistribute it and/or modify
6  it under the terms of the GNU Lesser General Public License as published by
7  the Free Software Foundation; either version 2.1, or (at your option)
8  any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU Lesser General Public License for more details.
14 
15  You should have received a copy of the GNU Lesser General Public License
16  along with this program; if not, see <https://www.gnu.org/licenses/>. */
17 
18 #ifndef BASE64_H
19 # define BASE64_H
20 
21 /* Get size_t. */
22 # include <stddef.h>
23 
24 /* Get bool. */
25 # include <stdbool.h>
26 
27 # ifdef __cplusplus
28 extern "C" {
29 # endif
30 
31 /* This uses that the expression (n+(k-1))/k means the smallest
32  integer >= n/k, i.e., the ceiling of n/k. */
33 # define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
34 
36 {
37  unsigned int i;
38  char buf[4];
39 };
40 
41 extern bool isbase64 (char ch) _GL_ATTRIBUTE_CONST;
42 
43 extern void base64_encode (const char *restrict in, size_t inlen,
44  char *restrict out, size_t outlen);
45 
46 extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
47 
48 extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
49 
50 extern bool base64_decode_ctx (struct base64_decode_context *ctx,
51  const char *restrict in, size_t inlen,
52  char *restrict out, size_t *outlen);
53 
54 extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
55  const char *in, size_t inlen,
56  char **out, size_t *outlen);
57 
58 #define base64_decode(in, inlen, out, outlen) \
59  base64_decode_ctx (NULL, in, inlen, out, outlen)
60 
61 #define base64_decode_alloc(in, inlen, out, outlen) \
62  base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
63 
64 # ifdef __cplusplus
65 }
66 # endif
67 
68 #endif /* BASE64_H */
signed char isbase64(char ch) _GL_ATTRIBUTE_CONST
Definition: base64.c:329
void base64_encode(const char *restrict in, size_t inlen, char *restrict out, size_t outlen)
size_t base64_encode_alloc(const char *in, size_t inlen, char **out)
Definition: base64.c:145
signed char base64_decode_alloc_ctx(struct base64_decode_context *ctx, const char *in, size_t inlen, char **out, size_t *outlen)
Definition: base64.c:579
void base64_decode_ctx_init(struct base64_decode_context *ctx)
Definition: base64.c:336
signed char base64_decode_ctx(struct base64_decode_context *ctx, const char *restrict in, size_t inlen, char *restrict out, size_t *outlen)
#define restrict
Definition: config.h:69
unsigned int i
Definition: base64.h:37