aes.h 代码如下, 添加了中文注释表示含义
/*
* Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef HEADER_AES_H
# define HEADER_AES_H
# include <openssl/opensslconf.h>
# include <stddef.h>
# ifdef __cplusplus
extern "C" {
# endif
# define AES_ENCRYPT 1
# define AES_DECRYPT 0
/*
* Because array size can't be a const in C, the following two are macros.
* Both sizes are in bytes.
*/
# define AES_MAXNR 14
# define AES_BLOCK_SIZE 16
/* This should be a hidden type, but EVP requires that the size be known */
struct aes_key_st {
# ifdef AES_LONG
unsigned long rd_key[4 * (AES_MAXNR + 1)];
# else
unsigned int rd_key[4 * (AES_MAXNR + 1)];
# endif
int rounds;
};
typedef struct aes_key_st AES_KEY;
/* AES算法状态,是全部支持或者是部分支持。
返回值:“aes(full)” 或者"aes(partial)" */
const char *AES_options(void);
/* 设定加密用的Key;
userKey: 密钥数值;
bits:密钥长度,以bit为单位,如果密钥数字是16个字节,则此参数值应为128;
key: AES_KEY对象指针;
返回值: 0 成功, -1 userkey,key为空, -2: 密钥长度不是128,192,256;
*/
int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
AES_KEY *key);
int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
AES_KEY *key);
/*
AES 加密,加密单个数据块,in,out可以是同一内存区;
in: 需要加密的数据;
out: 加密后的数据;
key:AES 密钥;
*/
void AES_encrypt(const unsigned char *in, unsigned char *out,
const AES_KEY *key);
void AES_decrypt(const unsigned char *in, unsigned char *out,
const AES_KEY *key);
/*
AES加密/解密单个数据块,ECB模式
in: 需要加密/解密的数据;
out: 计算后输出的数据;
key:密钥
enc: AES_ENCRYPT 代表加密, AES_DECRYPT代表解密;
*/
void AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
const AES_KEY *key, const int enc);
/*
AES加密/解密单个数据块,CBC模式
in: 需要加密/解密的数据;
out: 计算后输出的数据;
length: 数据长度
key:密钥
ivec: 初始向量
enc: AES_ENCRYPT 代表加密, AES_DECRYPT代表解密;
*/
void AES_cbc_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
unsigned char *ivec, const int enc);
/*
AES CFB128位模式加密/解密,输入输出数据区可以重叠;
in: 需要加密/解密的数据;
out: 计算后输出的数据;
length: 数据长度;
key: 密钥;
ivec: 初始化向量
num: 输出参数,计算状态,多少个CFB数据块
enc: 计算模式, 加密: AES_ENCRYPT , 解密: AES_DECRYPT
*/
void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
unsigned char *ivec, int *num, const int enc);
void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
unsigned char *ivec, int *num, const int enc);
void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
unsigned char *ivec, int *num, const int enc);
void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
unsigned char *ivec, int *num);
/*
AES 加密/解密,输入输出数据区可以重叠,初始化向量是加密数据块的2倍,加密前用前半部分做一次异或,加密后用后半部分做一次异或;
in: 需要加密/解密的数据;
out: 计算后输出的数据;
length: 数据长度;
key: 密钥;
ivec: 初始化向量
enc: 计算模式, 加密: AES_ENCRYPT , 解密: AES_DECRYPT
*/
/* NB: the IV is _two_ blocks long */
void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
unsigned char *ivec, const int enc);
/*
AES 加密/解密,输入输出数据区可以重叠,初始化向量是加密数据块的4倍,加密前用第一部分做一次异或,加密后用第二部分做一次异或;
最后一个加密数据块,加密前用第三部分异或,加密后用第四部分异或;
in: 需要加密/解密的数据;
out: 计算后输出的数据;
length: 数据长度;
key: 密钥;
ivec: 初始化向量
enc: 计算模式, 加密: AES_ENCRYPT , 解密: AES_DECRYPT
*/
/* NB: the IV is _four_ blocks long */
void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
size_t length, const AES_KEY *key,
const AES_KEY *key2, const unsigned char *ivec,
const int enc);
/*
用AES算法对明文key数据加密
key: AES Key,用于加密密钥数据
iv: 初始化向量
out: 加密后的密钥数据
in: 密钥数据
inlen: 密钥数据长度
返回值: 1: 成功, 0: 失败
*/
int AES_wrap_key(AES_KEY *key, const unsigned char *iv,
unsigned char *out,
const unsigned char *in, unsigned int inlen);
/*
用AES算法对明文key数据加密
key: AES Key,用于加密密钥数据
iv: 初始化向量
out: 加密后的密钥数据
in: 密钥数据
inlen: 密钥数据长度
返回值: 1: 成功, 0: 失败
*/
int AES_unwrap_key(AES_KEY *key, const unsigned char *iv,
unsigned char *out,
const unsigned char *in, unsigned int inlen);
# ifdef __cplusplus
}
# endif
#endif
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原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。