mirror of
https://gitlab.com/cryptsetup/cryptsetup.git
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6859993ea7
String.h and stdbool.h are already included in main backend header, no need to include them again. Stdio.h is missing for OpenSSL and NSS backed (for sprintf). Strings.h is missing for cipher_generic, gcrypt and OpoenSSL (strcasecmp). Fixes: #885
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/*
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* Linux kernel cipher generic utilities
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*
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* Copyright (C) 2018-2024 Red Hat, Inc. All rights reserved.
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* Copyright (C) 2018-2024 Milan Broz
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*
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* This file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <errno.h>
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#include <strings.h>
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#include "crypto_backend.h"
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struct cipher_alg {
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const char *name;
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const char *mode;
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int blocksize;
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bool wrapped_key;
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};
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static const struct cipher_alg cipher_algs[] = {
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{ "cipher_null", NULL, 16, false },
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{ "aes", NULL, 16, false },
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{ "serpent", NULL, 16, false },
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{ "twofish", NULL, 16, false },
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{ "anubis", NULL, 16, false },
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{ "blowfish", NULL, 8, false },
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{ "camellia", NULL, 16, false },
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{ "cast5", NULL, 8, false },
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{ "cast6", NULL, 16, false },
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{ "des", NULL, 8, false },
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{ "des3_ede", NULL, 8, false },
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{ "khazad", NULL, 8, false },
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{ "seed", NULL, 16, false },
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{ "tea", NULL, 8, false },
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{ "xtea", NULL, 8, false },
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{ "paes", NULL, 16, true }, /* protected AES, s390 wrapped key scheme */
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{ "xchacha12,aes", "adiantum", 32, false },
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{ "xchacha20,aes", "adiantum", 32, false },
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{ "sm4", NULL, 16, false },
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{ "aria", NULL, 16, false },
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{ NULL, NULL, 0, false }
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};
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static const struct cipher_alg *_get_alg(const char *name, const char *mode)
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{
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int i = 0;
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while (name && cipher_algs[i].name) {
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if (!strcasecmp(name, cipher_algs[i].name))
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if (!mode || !cipher_algs[i].mode ||
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!strncasecmp(mode, cipher_algs[i].mode, strlen(cipher_algs[i].mode)))
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return &cipher_algs[i];
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i++;
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}
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return NULL;
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}
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int crypt_cipher_ivsize(const char *name, const char *mode)
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{
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const struct cipher_alg *ca = _get_alg(name, mode);
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if (!ca)
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return -EINVAL;
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if (mode && !strcasecmp(mode, "ecb"))
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return 0;
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return ca->blocksize;
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}
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int crypt_cipher_wrapped_key(const char *name, const char *mode)
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{
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const struct cipher_alg *ca = _get_alg(name, mode);
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return ca ? (int)ca->wrapped_key : 0;
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}
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