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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 08:06:26 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 08:06:26 +0000 |
commit | 1660d4b7a65d9ad2ce0deaa19d35579ca4084ac5 (patch) | |
tree | 6cf8220b628ebd2ccfc1375dd6516c6996e9abcc /lib/crypto_backend/cipher_generic.c | |
parent | Initial commit. (diff) | |
download | cryptsetup-1660d4b7a65d9ad2ce0deaa19d35579ca4084ac5.tar.xz cryptsetup-1660d4b7a65d9ad2ce0deaa19d35579ca4084ac5.zip |
Adding upstream version 2:2.6.1.upstream/2%2.6.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/crypto_backend/cipher_generic.c')
-rw-r--r-- | lib/crypto_backend/cipher_generic.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/crypto_backend/cipher_generic.c b/lib/crypto_backend/cipher_generic.c new file mode 100644 index 0000000..b3a4407 --- /dev/null +++ b/lib/crypto_backend/cipher_generic.c @@ -0,0 +1,89 @@ +/* + * Linux kernel cipher generic utilities + * + * Copyright (C) 2018-2023 Red Hat, Inc. All rights reserved. + * Copyright (C) 2018-2023 Milan Broz + * + * This file is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This file 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this file; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <string.h> +#include <stdbool.h> +#include <errno.h> +#include "crypto_backend.h" + +struct cipher_alg { + const char *name; + const char *mode; + int blocksize; + bool wrapped_key; +}; + +static const struct cipher_alg cipher_algs[] = { + { "cipher_null", NULL, 16, false }, + { "aes", NULL, 16, false }, + { "serpent", NULL, 16, false }, + { "twofish", NULL, 16, false }, + { "anubis", NULL, 16, false }, + { "blowfish", NULL, 8, false }, + { "camellia", NULL, 16, false }, + { "cast5", NULL, 8, false }, + { "cast6", NULL, 16, false }, + { "des", NULL, 8, false }, + { "des3_ede", NULL, 8, false }, + { "khazad", NULL, 8, false }, + { "seed", NULL, 16, false }, + { "tea", NULL, 8, false }, + { "xtea", NULL, 8, false }, + { "paes", NULL, 16, true }, /* protected AES, s390 wrapped key scheme */ + { "xchacha12,aes", "adiantum", 32, false }, + { "xchacha20,aes", "adiantum", 32, false }, + { "sm4", NULL, 16, false }, + { NULL, NULL, 0, false } +}; + +static const struct cipher_alg *_get_alg(const char *name, const char *mode) +{ + int i = 0; + + while (name && cipher_algs[i].name) { + if (!strcasecmp(name, cipher_algs[i].name)) + if (!mode || !cipher_algs[i].mode || + !strncasecmp(mode, cipher_algs[i].mode, strlen(cipher_algs[i].mode))) + return &cipher_algs[i]; + i++; + } + return NULL; +} + +int crypt_cipher_ivsize(const char *name, const char *mode) +{ + const struct cipher_alg *ca = _get_alg(name, mode); + + if (!ca) + return -EINVAL; + + if (mode && !strcasecmp(mode, "ecb")) + return 0; + + return ca->blocksize; +} + +int crypt_cipher_wrapped_key(const char *name, const char *mode) +{ + const struct cipher_alg *ca = _get_alg(name, mode); + + return ca ? (int)ca->wrapped_key : 0; +} |