diff options
Diffstat (limited to 'src/libdnssec/shared/keyid_gnutls.c')
-rw-r--r-- | src/libdnssec/shared/keyid_gnutls.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/libdnssec/shared/keyid_gnutls.c b/src/libdnssec/shared/keyid_gnutls.c new file mode 100644 index 0000000..eee27d3 --- /dev/null +++ b/src/libdnssec/shared/keyid_gnutls.c @@ -0,0 +1,99 @@ +/* Copyright (C) 2022 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/>. + */ + +#include <assert.h> +#include <gnutls/abstract.h> +#include <gnutls/gnutls.h> +#include <gnutls/x509.h> +#include <string.h> + +#include "contrib/string.h" +#include "libdnssec/binary.h" +#include "libdnssec/error.h" +#include "libdnssec/keyid.h" +#include "libdnssec/shared/keyid_gnutls.h" +#include "libdnssec/shared/shared.h" + +/*! + * Get binary key ID from a key (public or private). + */ +static int keyid_bin(gnutls_x509_privkey_t key, gnutls_pubkey_t pubkey, dnssec_binary_t *id) +{ + assert(key || pubkey); + assert(id); + + // Flags can be used to enable SHA-2 since GnuTLS 3.4.7. + + int flags = 0; + uint8_t buffer[DNSSEC_KEYID_BINARY_SIZE]; + size_t size = DNSSEC_KEYID_SIZE; + + int r = key ? gnutls_x509_privkey_get_key_id(key, flags, buffer, &size) + : gnutls_pubkey_get_key_id(pubkey, flags, buffer, &size); + + if (r != GNUTLS_E_SUCCESS || size != DNSSEC_KEYID_BINARY_SIZE) { + return DNSSEC_INVALID_KEY_ID; + } + + assert(size == DNSSEC_KEYID_BINARY_SIZE); + r = dnssec_binary_resize(id, size); + if (r != DNSSEC_EOK) { + return r; + } + + memcpy(id->data, buffer, size); + + return DNSSEC_EOK; +} + +/*! + * Get hexadecimal key ID from a key (public or private). + */ +static int keyid_hex(gnutls_x509_privkey_t key, gnutls_pubkey_t pubkey, char **id) +{ + _cleanup_binary_ dnssec_binary_t bin = { 0 }; + int r = keyid_bin(key, pubkey, &bin); + if (r != DNSSEC_EOK) { + return r; + } + + *id = bin_to_hex(bin.data, bin.size, false); + if (*id == NULL) { + return DNSSEC_ENOMEM; + } + + return DNSSEC_EOK; +} + +int keyid_x509(gnutls_x509_privkey_t key, dnssec_binary_t *id) +{ + return keyid_bin(key, NULL, id); +} + +int keyid_x509_hex(gnutls_x509_privkey_t key, char **id) +{ + return keyid_hex(key, NULL, id); +} + +int keyid_pubkey(gnutls_pubkey_t pubkey, dnssec_binary_t *id) +{ + return keyid_bin(NULL, pubkey, id); +} + +int keyid_pubkey_hex(gnutls_pubkey_t pubkey, char **id) +{ + return keyid_hex(NULL, pubkey, id); +} |