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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135// SPDX-License-Identifier: GPL-2.0-or-later/* * Cryptographic API. * * DES & Triple DES EDE Cipher Algorithms. * * Copyright (c) 2005 Dag Arne Osvik <da@osvik.no> */
#include <asm/byteorder.h>#include <crypto/algapi.h>#include <linux/bitops.h>#include <linux/init.h>#include <linux/module.h>#include <linux/errno.h>
#include <crypto/internal/des.h>
static int des_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen){ struct des_ctx *dctx = crypto_tfm_ctx(tfm); int err;
err = des_expand_key(dctx, key, keylen); if (err == -ENOKEY) { if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS) err = -EINVAL; else err = 0; } if (err) memset(dctx, 0, sizeof(*dctx)); return err;}
static void crypto_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){ const struct des_ctx *dctx = crypto_tfm_ctx(tfm);
des_encrypt(dctx, dst, src);}
static void crypto_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){ const struct des_ctx *dctx = crypto_tfm_ctx(tfm);
des_decrypt(dctx, dst, src);}
static int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen){ struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm); int err;
err = des3_ede_expand_key(dctx, key, keylen); if (err == -ENOKEY) { if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS) err = -EINVAL; else err = 0; } if (err) memset(dctx, 0, sizeof(*dctx)); return err;}
static void crypto_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){ const struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
des3_ede_encrypt(dctx, dst, src);}
static void crypto_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src){ const struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
des3_ede_decrypt(dctx, dst, src);}
static struct crypto_alg des_algs[2] = { { .cra_name = "des", .cra_driver_name = "des-generic", .cra_priority = 100, .cra_flags = CRYPTO_ALG_TYPE_CIPHER, .cra_blocksize = DES_BLOCK_SIZE, .cra_ctxsize = sizeof(struct des_ctx), .cra_module = THIS_MODULE, .cra_u = { .cipher = { .cia_min_keysize = DES_KEY_SIZE, .cia_max_keysize = DES_KEY_SIZE, .cia_setkey = des_setkey, .cia_encrypt = crypto_des_encrypt, .cia_decrypt = crypto_des_decrypt } }}, { .cra_name = "des3_ede", .cra_driver_name = "des3_ede-generic", .cra_priority = 100, .cra_flags = CRYPTO_ALG_TYPE_CIPHER, .cra_blocksize = DES3_EDE_BLOCK_SIZE, .cra_ctxsize = sizeof(struct des3_ede_ctx), .cra_module = THIS_MODULE, .cra_u = { .cipher = { .cia_min_keysize = DES3_EDE_KEY_SIZE, .cia_max_keysize = DES3_EDE_KEY_SIZE, .cia_setkey = des3_ede_setkey, .cia_encrypt = crypto_des3_ede_encrypt, .cia_decrypt = crypto_des3_ede_decrypt } }} };
static int __init des_generic_mod_init(void){ return crypto_register_algs(des_algs, ARRAY_SIZE(des_algs));}
static void __exit des_generic_mod_fini(void){ crypto_unregister_algs(des_algs, ARRAY_SIZE(des_algs));}
module_init(des_generic_mod_init);module_exit(des_generic_mod_fini);
MODULE_LICENSE("GPL");MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms");MODULE_AUTHOR("Dag Arne Osvik <da@osvik.no>");MODULE_ALIAS_CRYPTO("des");MODULE_ALIAS_CRYPTO("des-generic");MODULE_ALIAS_CRYPTO("des3_ede");MODULE_ALIAS_CRYPTO("des3_ede-generic");