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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:24:08 +0000 |
commit | f449f278dd3c70e479a035f50a9bb817a9b433ba (patch) | |
tree | 8ca2bfb785dda9bb4d573acdf9b42aea9cd51383 /src/libdnssec/shared/bignum.h | |
parent | Initial commit. (diff) | |
download | knot-upstream/3.2.6.tar.xz knot-upstream/3.2.6.zip |
Adding upstream version 3.2.6.upstream/3.2.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/libdnssec/shared/bignum.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/libdnssec/shared/bignum.h b/src/libdnssec/shared/bignum.h new file mode 100644 index 0000000..e4ddede --- /dev/null +++ b/src/libdnssec/shared/bignum.h @@ -0,0 +1,41 @@ +/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program 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 a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#pragma once + +#include <stdlib.h> + +#include "libdnssec/binary.h" +#include "contrib/wire_ctx.h" + +/*! + * Size needed to write unsigned number in unsigned encoding. + */ +size_t bignum_size_u(const dnssec_binary_t *value); + +/*! + * Size needed to write unsigned number in signed encoding. + * + * Signed encoding expects the MSB to be zero. + */ +size_t bignum_size_s(const dnssec_binary_t *value); + +/*! + * Write unsigned number on a fixed width in a big-endian byte order. + * + * The destination size has to be set properly to accommodate used encoding. + */ +void bignum_write(wire_ctx_t *ctx, size_t width, const dnssec_binary_t *value); |