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base16-encode.c
65 строк
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Niels Möller
Change type of base16- and base64-encoded data from uint8_t to char.
27 авг 2017, 21:45
27 авг 2017, 21:45
f2da403
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/* base16-encode.c Hex encoding. Copyright (C) 2002 Niels Möller This file is part of GNU Nettle. GNU Nettle is free software: you can redistribute it and/or modify it under the terms of either: * the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. or * the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. or both in parallel, as here. GNU Nettle 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 General Public License for more details. You should have received copies of the GNU General Public License and the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/. */ #if HAVE_CONFIG_H # include "config.h" #endif #include "base16.h" static const uint8_t hex_digits[16] = "0123456789abcdef"; #define DIGIT(x) (hex_digits[(x) & 0xf]) /* Encodes a single byte. Always stores two digits in dst[0] and dst[1]. */ void base16_encode_single(char *dst, uint8_t src) { dst[0] = DIGIT(src/0x10); dst[1] = DIGIT(src); } /* Always stores BASE16_ENCODE_LENGTH(length) digits in dst. */ void base16_encode_update(char *dst, size_t length, const uint8_t *src) { size_t i; for (i = 0; i<length; i++, dst += 2) base16_encode_single(dst, src[i]); }