From b88bb292821fd7742604ec4e280acebd9a049f62 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:36:22 +0200 Subject: Adding upstream version 3.0.5. Signed-off-by: Daniel Baumann --- src/libdnssec/sign/der.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 src/libdnssec/sign/der.h (limited to 'src/libdnssec/sign/der.h') diff --git a/src/libdnssec/sign/der.h b/src/libdnssec/sign/der.h new file mode 100644 index 0000000..687b061 --- /dev/null +++ b/src/libdnssec/sign/der.h @@ -0,0 +1,56 @@ +/* Copyright (C) 2018 CZ.NIC, z.s.p.o. + + 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 . + */ + +#pragma once + +#include "libdnssec/binary.h" + +/* + * The ECDSA signatures in DNSSEC are encoded differently than in X.509 + * (PKCS #1). The cryptographic libraries usually produce the signatures in + * X.509 format, which uses Dss-Sig-Value to encapsulate 'r' and 's' values + * of the signature. + * + * This module provides decoding and encoding of this format. + * + * The 'r' and 's' values are treated as unsigned values: The leading zeroes + * are stripped on decoding; an extra leading zero is added on encoding in case + * the value starts with a set bit. + */ + +/*! + * Decode signature parameters from X.509 ECDSA signature. + * + * \param[in] der X.509 encoded signature. + * \param[out] s Value 's' of the signature, will point to the data in DER. + * \param[out] r Value 'r' of the signature, will point to the data in DER. + * + * \return Error code, DNSSEC_EOK if successful. + */ +int dss_sig_value_decode(const dnssec_binary_t *der, + dnssec_binary_t *r, dnssec_binary_t *s); + +/*! + * Encode signature parameters from X.509 ECDSA signature. + * + * \param[in] s Value 's' of the signature. + * \param[in] r Value 'r' of the signature. + * \param[out] der X.509 signature, the content will be allocated. + * + * \return Error code, DNSSEC_EOK if successful. + */ +int dss_sig_value_encode(const dnssec_binary_t *r, const dnssec_binary_t *s, + dnssec_binary_t *der); -- cgit v1.2.3