* Serpent Cipher Algorithm.
*
* Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
- * 2003 Herbert Valerio Riedel <hvr@gnu.org>
- *
- * Added tnepres support: Ruben Jesus Garcia Hernandez <ruben@ugr.es>, 18.10.2004
- * Based on code by hvr
*
* 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
u32 expkey[SERPENT_EXPKEY_WORDS];
};
-
-static int serpent_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
+static int setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
{
u32 *k = ((struct serpent_ctx *)ctx)->expkey;
u8 *k8 = (u8 *)k;
return 0;
}
-static void serpent_encrypt(void *ctx, u8 *dst, const u8 *src)
+static void encrypt(void *ctx, u8 *dst, const u8 *src)
{
const u32
*k = ((struct serpent_ctx *)ctx)->expkey,
d[3] = cpu_to_le32(r3);
}
-static void serpent_decrypt(void *ctx, u8 *dst, const u8 *src)
+static void decrypt(void *ctx, u8 *dst, const u8 *src)
{
const u32
*k = ((struct serpent_ctx *)ctx)->expkey,
.cra_u = { .cipher = {
.cia_min_keysize = SERPENT_MIN_KEY_SIZE,
.cia_max_keysize = SERPENT_MAX_KEY_SIZE,
- .cia_setkey = serpent_setkey,
- .cia_encrypt = serpent_encrypt,
- .cia_decrypt = serpent_decrypt } }
-};
-
-static int tnepres_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
-{
- u8 rev_key[SERPENT_MAX_KEY_SIZE];
- int i;
-
- if ((keylen < SERPENT_MIN_KEY_SIZE)
- || (keylen > SERPENT_MAX_KEY_SIZE)) {
- *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
- return -EINVAL;
- }
-
- for (i = 0; i < keylen; ++i)
- rev_key[keylen - i - 1] = key[i];
-
- return serpent_setkey(ctx, rev_key, keylen, flags);
-}
-
-static void tnepres_encrypt(void *ctx, u8 *dst, const u8 *src)
-{
- const u32 * const s = (const u32 * const)src;
- u32 * const d = (u32 * const)dst;
-
- u32 rs[4], rd[4];
-
- rs[0] = swab32(s[3]);
- rs[1] = swab32(s[2]);
- rs[2] = swab32(s[1]);
- rs[3] = swab32(s[0]);
-
- serpent_encrypt(ctx, (u8 *)rd, (u8 *)rs);
-
- d[0] = swab32(rd[3]);
- d[1] = swab32(rd[2]);
- d[2] = swab32(rd[1]);
- d[3] = swab32(rd[0]);
-}
-
-static void tnepres_decrypt(void *ctx, u8 *dst, const u8 *src)
-{
- const u32 * const s = (const u32 * const)src;
- u32 * const d = (u32 * const)dst;
-
- u32 rs[4], rd[4];
-
- rs[0] = swab32(s[3]);
- rs[1] = swab32(s[2]);
- rs[2] = swab32(s[1]);
- rs[3] = swab32(s[0]);
-
- serpent_decrypt(ctx, (u8 *)rd, (u8 *)rs);
-
- d[0] = swab32(rd[3]);
- d[1] = swab32(rd[2]);
- d[2] = swab32(rd[1]);
- d[3] = swab32(rd[0]);
-}
-
-static struct crypto_alg tnepres_alg = {
- .cra_name = "tnepres",
- .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
- .cra_blocksize = SERPENT_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct serpent_ctx),
- .cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
- .cra_u = { .cipher = {
- .cia_min_keysize = SERPENT_MIN_KEY_SIZE,
- .cia_max_keysize = SERPENT_MAX_KEY_SIZE,
- .cia_setkey = tnepres_setkey,
- .cia_encrypt = tnepres_encrypt,
- .cia_decrypt = tnepres_decrypt } }
+ .cia_setkey = setkey,
+ .cia_encrypt = encrypt,
+ .cia_decrypt = decrypt } }
};
static int __init init(void)
{
- int ret = crypto_register_alg(&serpent_alg);
-
- if (ret)
- return ret;
-
- ret = crypto_register_alg(&tnepres_alg);
-
- if (ret)
- crypto_unregister_alg(&serpent_alg);
-
- return ret;
+ return crypto_register_alg(&serpent_alg);
}
static void __exit fini(void)
{
- crypto_unregister_alg(&tnepres_alg);
crypto_unregister_alg(&serpent_alg);
}
module_exit(fini);
MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Serpent and tnepres (kerneli compatible serpent reversed) Cipher Algorithm");
+MODULE_DESCRIPTION("Serpent Cipher Algorithm");
MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>");
-MODULE_ALIAS("tnepres");