1 Star 0 Fork 0

ttsu00/nettle

加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
文件
克隆/下载
rsa-oaep-encrypt.c 3.18 KB
一键复制 编辑 原始数据 按行查看 历史
Nicolas Mora 提交于 2021-02-13 02:59 +08:00 . Implement encryption/decryption RSA-OAEP
/* rsa-oaep-encrypt.c
The RSA publickey algorithm. OAEP encryption.
Copyright (C) 2021-2024 Nicolas Mora
Copyright (C) 2024 Daiki Ueno
This file is part of GNU Nettle.
GNU Nettle is free software: you can redistribute it and/or
modify it under the terms of either:
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
or both in parallel, as here.
GNU Nettle 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
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see http://www.gnu.org/licenses/.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "rsa.h"
#include "nettle-internal.h"
#include "oaep.h"
#include "rsa-internal.h"
int
_rsa_oaep_encrypt (const struct rsa_public_key *key,
void *random_ctx, nettle_random_func *random,
void *hash_ctx, const struct nettle_hash *hash,
size_t label_length, const uint8_t *label,
size_t length, const uint8_t *message,
uint8_t *ciphertext)
{
mpz_t gibberish;
mpz_init (gibberish);
if (_oaep_encode_mgf1 (gibberish, key->size,
random_ctx, random,
hash_ctx, hash,
label_length, label,
length, message))
{
mpz_powm (gibberish, gibberish, key->e, key->n);
nettle_mpz_get_str_256 (key->size, ciphertext, gibberish);
mpz_clear (gibberish);
return 1;
}
mpz_clear (gibberish);
return 0;
}
int
rsa_oaep_sha256_encrypt (const struct rsa_public_key *key,
void *random_ctx, nettle_random_func *random,
size_t label_length, const uint8_t *label,
size_t length, const uint8_t *message,
uint8_t *ciphertext)
{
struct sha256_ctx ctx;
sha256_init (&ctx);
return _rsa_oaep_encrypt (key,
random_ctx, random,
&ctx, &nettle_sha256,
label_length, label,
length, message,
ciphertext);
}
int
rsa_oaep_sha384_encrypt (const struct rsa_public_key *key,
void *random_ctx, nettle_random_func *random,
size_t label_length, const uint8_t *label,
size_t length, const uint8_t *message,
uint8_t *ciphertext)
{
struct sha384_ctx ctx;
sha384_init (&ctx);
return _rsa_oaep_encrypt (key,
random_ctx, random,
&ctx, &nettle_sha384,
label_length, label,
length, message,
ciphertext);
}
int
rsa_oaep_sha512_encrypt (const struct rsa_public_key *key,
void *random_ctx, nettle_random_func *random,
size_t label_length, const uint8_t *label,
size_t length, const uint8_t *message,
uint8_t *ciphertext)
{
struct sha512_ctx ctx;
sha512_init (&ctx);
return _rsa_oaep_encrypt (key,
random_ctx, random,
&ctx, &nettle_sha512,
label_length, label,
length, message,
ciphertext);
}
Loading...
马建仓 AI 助手
尝试更多
代码解读
代码找茬
代码优化
1
https://gitee.com/ttsu00/nettle.git
[email protected]:ttsu00/nettle.git
ttsu00
nettle
nettle
master

搜索帮助