/usr/include/nettle/base16.h is in nettle-dev 2.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | /* base16.h
*
* Hex encoding and decoding, following spki conventions (i.e.
* allowing whitespace between digits).
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2002 Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#ifndef NETTLE_BASE16_H_INCLUDED
#define NETTLE_BASE16_H_INCLUDED
#include "nettle-types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define base16_encode_single nettle_base16_encode_single
#define base16_encode_update nettle_base16_encode_update
#define base16_decode_init nettle_base16_decode_init
#define base16_decode_single nettle_base16_decode_single
#define base16_decode_update nettle_base16_decode_update
#define base16_decode_final nettle_base16_decode_final
/* Base16 encoding */
/* Maximum length of output for base16_encode_update. */
#define BASE16_ENCODE_LENGTH(length) ((length) * 2)
/* Encodes a single byte. Always stores two digits in dst[0] and dst[1]. */
void
base16_encode_single(uint8_t *dst,
uint8_t src);
/* Always stores BASE16_ENCODE_LENGTH(length) digits in dst. */
void
base16_encode_update(uint8_t *dst,
unsigned length,
const uint8_t *src);
/* Base16 decoding */
/* Maximum length of output for base16_decode_update. */
/* We have at most 4 buffered bits, and a total of (length + 1) * 4 bits. */
#define BASE16_DECODE_LENGTH(length) (((length) + 1) / 2)
struct base16_decode_ctx
{
unsigned word; /* Leftover bits */
unsigned bits; /* Number buffered bits */
};
void
base16_decode_init(struct base16_decode_ctx *ctx);
/* Decodes a single byte. Returns amount of output (0 or 1), or -1 on
* errors. */
int
base16_decode_single(struct base16_decode_ctx *ctx,
uint8_t *dst,
uint8_t src);
/* Returns 1 on success, 0 on error. DST should point to an area of
* size at least BASE16_DECODE_LENGTH(length), and for sanity
* checking, *DST_LENGTH should be initialized to the size of that
* area before the call. *DST_LENGTH is updated to the amount of
* decoded output. */
/* Currently results in an assertion failure if *DST_LENGTH is
* too small. FIXME: Return some error instead? */
int
base16_decode_update(struct base16_decode_ctx *ctx,
unsigned *dst_length,
uint8_t *dst,
unsigned src_length,
const uint8_t *src);
/* Returns 1 on success. */
int
base16_decode_final(struct base16_decode_ctx *ctx);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_BASE16_H_INCLUDED */
|