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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229// SPDX-License-Identifier: GPL-2.0-or-later/* * ECB: Electronic CodeBook mode * * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> */
#include <crypto/internal/cipher.h>#include <crypto/internal/skcipher.h>#include <linux/err.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/slab.h>
static int crypto_ecb_crypt(struct crypto_cipher *cipher, const u8 *src, u8 *dst, unsigned nbytes, bool final, void (*fn)(struct crypto_tfm *, u8 *, const u8 *)){ const unsigned int bsize = crypto_cipher_blocksize(cipher);
while (nbytes >= bsize) { fn(crypto_cipher_tfm(cipher), dst, src);
src += bsize; dst += bsize;
nbytes -= bsize; }
return nbytes && final ? -EINVAL : nbytes;}
static int crypto_ecb_encrypt2(struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len, u8 *iv, u32 flags){ struct crypto_cipher **ctx = crypto_lskcipher_ctx(tfm); struct crypto_cipher *cipher = *ctx;
return crypto_ecb_crypt(cipher, src, dst, len, flags & CRYPTO_LSKCIPHER_FLAG_FINAL, crypto_cipher_alg(cipher)->cia_encrypt);}
static int crypto_ecb_decrypt2(struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len, u8 *iv, u32 flags){ struct crypto_cipher **ctx = crypto_lskcipher_ctx(tfm); struct crypto_cipher *cipher = *ctx;
return crypto_ecb_crypt(cipher, src, dst, len, flags & CRYPTO_LSKCIPHER_FLAG_FINAL, crypto_cipher_alg(cipher)->cia_decrypt);}
static int lskcipher_setkey_simple2(struct crypto_lskcipher *tfm, const u8 *key, unsigned int keylen){ struct crypto_cipher **ctx = crypto_lskcipher_ctx(tfm); struct crypto_cipher *cipher = *ctx;
crypto_cipher_clear_flags(cipher, CRYPTO_TFM_REQ_MASK); crypto_cipher_set_flags(cipher, crypto_lskcipher_get_flags(tfm) & CRYPTO_TFM_REQ_MASK); return crypto_cipher_setkey(cipher, key, keylen);}
static int lskcipher_init_tfm_simple2(struct crypto_lskcipher *tfm){ struct lskcipher_instance *inst = lskcipher_alg_instance(tfm); struct crypto_cipher **ctx = crypto_lskcipher_ctx(tfm); struct crypto_cipher_spawn *spawn; struct crypto_cipher *cipher;
spawn = lskcipher_instance_ctx(inst); cipher = crypto_spawn_cipher(spawn); if (IS_ERR(cipher)) return PTR_ERR(cipher);
*ctx = cipher; return 0;}
static void lskcipher_exit_tfm_simple2(struct crypto_lskcipher *tfm){ struct crypto_cipher **ctx = crypto_lskcipher_ctx(tfm);
crypto_free_cipher(*ctx);}
static void lskcipher_free_instance_simple2(struct lskcipher_instance *inst){ crypto_drop_cipher(lskcipher_instance_ctx(inst)); kfree(inst);}
static struct lskcipher_instance *lskcipher_alloc_instance_simple2( struct crypto_template *tmpl, struct rtattr **tb){ struct crypto_cipher_spawn *spawn; struct lskcipher_instance *inst; struct crypto_alg *cipher_alg; u32 mask; int err;
err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_LSKCIPHER, &mask); if (err) return ERR_PTR(err);
inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) return ERR_PTR(-ENOMEM); spawn = lskcipher_instance_ctx(inst);
err = crypto_grab_cipher(spawn, lskcipher_crypto_instance(inst), crypto_attr_alg_name(tb[1]), 0, mask); if (err) goto err_free_inst; cipher_alg = crypto_spawn_cipher_alg(spawn);
err = crypto_inst_setname(lskcipher_crypto_instance(inst), tmpl->name, cipher_alg); if (err) goto err_free_inst;
inst->free = lskcipher_free_instance_simple2;
/* Default algorithm properties, can be overridden */ inst->alg.co.base.cra_blocksize = cipher_alg->cra_blocksize; inst->alg.co.base.cra_alignmask = cipher_alg->cra_alignmask; inst->alg.co.base.cra_priority = cipher_alg->cra_priority; inst->alg.co.min_keysize = cipher_alg->cra_cipher.cia_min_keysize; inst->alg.co.max_keysize = cipher_alg->cra_cipher.cia_max_keysize; inst->alg.co.ivsize = cipher_alg->cra_blocksize;
/* Use struct crypto_cipher * by default, can be overridden */ inst->alg.co.base.cra_ctxsize = sizeof(struct crypto_cipher *); inst->alg.setkey = lskcipher_setkey_simple2; inst->alg.init = lskcipher_init_tfm_simple2; inst->alg.exit = lskcipher_exit_tfm_simple2;
return inst;
err_free_inst: lskcipher_free_instance_simple2(inst); return ERR_PTR(err);}
static int crypto_ecb_create2(struct crypto_template *tmpl, struct rtattr **tb){ struct lskcipher_instance *inst; int err;
inst = lskcipher_alloc_instance_simple2(tmpl, tb); if (IS_ERR(inst)) return PTR_ERR(inst);
/* ECB mode doesn't take an IV */ inst->alg.co.ivsize = 0;
inst->alg.encrypt = crypto_ecb_encrypt2; inst->alg.decrypt = crypto_ecb_decrypt2;
err = lskcipher_register_instance(tmpl, inst); if (err) inst->free(inst);
return err;}
static int crypto_ecb_create(struct crypto_template *tmpl, struct rtattr **tb){ struct crypto_lskcipher_spawn *spawn; struct lskcipher_alg *cipher_alg; struct lskcipher_instance *inst; int err;
inst = lskcipher_alloc_instance_simple(tmpl, tb); if (IS_ERR(inst)) { err = crypto_ecb_create2(tmpl, tb); return err; }
spawn = lskcipher_instance_ctx(inst); cipher_alg = crypto_lskcipher_spawn_alg(spawn);
/* ECB mode doesn't take an IV */ inst->alg.co.ivsize = 0; if (cipher_alg->co.ivsize) return -EINVAL;
inst->alg.co.base.cra_ctxsize = cipher_alg->co.base.cra_ctxsize; inst->alg.setkey = cipher_alg->setkey; inst->alg.encrypt = cipher_alg->encrypt; inst->alg.decrypt = cipher_alg->decrypt; inst->alg.init = cipher_alg->init; inst->alg.exit = cipher_alg->exit;
err = lskcipher_register_instance(tmpl, inst); if (err) inst->free(inst);
return err;}
static struct crypto_template crypto_ecb_tmpl = { .name = "ecb", .create = crypto_ecb_create, .module = THIS_MODULE,};
static int __init crypto_ecb_module_init(void){ return crypto_register_template(&crypto_ecb_tmpl);}
static void __exit crypto_ecb_module_exit(void){ crypto_unregister_template(&crypto_ecb_tmpl);}
module_init(crypto_ecb_module_init);module_exit(crypto_ecb_module_exit);
MODULE_LICENSE("GPL");MODULE_DESCRIPTION("ECB block cipher mode of operation");MODULE_ALIAS_CRYPTO("ecb");MODULE_IMPORT_NS("CRYPTO_INTERNAL");