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https://github.com/torvalds/linux
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14386d4713
The helper crypto_tfm_ctx is only used by the Crypto API algorithm code and should really be in algapi.h. However, for historical reasons many files relied on it to be in crypto.h. This patch changes those files to use algapi.h instead in prepartion for a move. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Cryptographic API.
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*
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* DES & Triple DES EDE Cipher Algorithms.
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*
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* Copyright (c) 2005 Dag Arne Osvik <da@osvik.no>
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*/
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#include <asm/byteorder.h>
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#include <crypto/algapi.h>
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#include <linux/bitops.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <crypto/internal/des.h>
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static int des_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct des_ctx *dctx = crypto_tfm_ctx(tfm);
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int err;
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err = des_expand_key(dctx, key, keylen);
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if (err == -ENOKEY) {
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if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)
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err = -EINVAL;
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else
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err = 0;
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}
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if (err)
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memset(dctx, 0, sizeof(*dctx));
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return err;
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}
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static void crypto_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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const struct des_ctx *dctx = crypto_tfm_ctx(tfm);
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des_encrypt(dctx, dst, src);
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}
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static void crypto_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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const struct des_ctx *dctx = crypto_tfm_ctx(tfm);
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des_decrypt(dctx, dst, src);
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}
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static int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
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int err;
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err = des3_ede_expand_key(dctx, key, keylen);
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if (err == -ENOKEY) {
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if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)
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err = -EINVAL;
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else
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err = 0;
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}
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if (err)
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memset(dctx, 0, sizeof(*dctx));
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return err;
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}
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static void crypto_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst,
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const u8 *src)
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{
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const struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
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des3_ede_encrypt(dctx, dst, src);
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}
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static void crypto_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst,
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const u8 *src)
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{
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const struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
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des3_ede_decrypt(dctx, dst, src);
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}
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static struct crypto_alg des_algs[2] = { {
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.cra_name = "des",
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.cra_driver_name = "des-generic",
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.cra_priority = 100,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = DES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des_ctx),
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.cra_module = THIS_MODULE,
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.cra_u = { .cipher = {
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.cia_min_keysize = DES_KEY_SIZE,
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.cia_max_keysize = DES_KEY_SIZE,
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.cia_setkey = des_setkey,
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.cia_encrypt = crypto_des_encrypt,
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.cia_decrypt = crypto_des_decrypt } }
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}, {
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.cra_name = "des3_ede",
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.cra_driver_name = "des3_ede-generic",
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.cra_priority = 100,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des3_ede_ctx),
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.cra_module = THIS_MODULE,
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.cra_u = { .cipher = {
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.cia_min_keysize = DES3_EDE_KEY_SIZE,
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.cia_max_keysize = DES3_EDE_KEY_SIZE,
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.cia_setkey = des3_ede_setkey,
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.cia_encrypt = crypto_des3_ede_encrypt,
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.cia_decrypt = crypto_des3_ede_decrypt } }
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} };
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static int __init des_generic_mod_init(void)
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{
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return crypto_register_algs(des_algs, ARRAY_SIZE(des_algs));
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}
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static void __exit des_generic_mod_fini(void)
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{
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crypto_unregister_algs(des_algs, ARRAY_SIZE(des_algs));
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}
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subsys_initcall(des_generic_mod_init);
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module_exit(des_generic_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");
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MODULE_AUTHOR("Dag Arne Osvik <da@osvik.no>");
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MODULE_ALIAS_CRYPTO("des");
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MODULE_ALIAS_CRYPTO("des-generic");
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MODULE_ALIAS_CRYPTO("des3_ede");
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MODULE_ALIAS_CRYPTO("des3_ede-generic");
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