我希望有一个用C语言编写的程序，可以使用AES-CBC对字符串进行编码/解码，而无需像openssl这样的大型库。
目标：
使用密码短语编码/解码字符串：
应用程序因此需要接受3个输入参数...
我是C的新手（我可以用C＃编写代码）。
我找到了https://github.com/kokke/tiny-AES128-C我需要配置但我不确定这些功能是否足以满足我的需要（见上文）
我当前的“主”代码在这里，它接受3个输入参数，然后根据第3个参数（“e”或“d”）调用函数encode / decode。
int main(int argc, char *argv[]) {
int i;
for (i = 0; i < argc; i++)
printf("i = %d, argv = %s\n", i, argv[i]);
if (argc < 4)
printf("missing args: input_text passphrase function\n");
else {
/*
... argv[1]; input_string
... argv[2]; passphrase
... argv[3]; function
*/
//encode if e
if( argv[3] == "e" ){
printf("encoded: " + encode(argv[1], argv[2]) );
} else { //decode else
printf("decoded: " + decode(argv[1], argv[2]) );
}
//printf("input: " + input);
}
return 0;
}
以下是完整的代码：
#include <stdio.h>
#include <string.h>
#include <stdint.h>
// Enable both ECB and CBC mode. Note this can be done before including aes.h or at compile-time.
// E.g. with GCC by using the -D flag: gcc -c aes.c -DCBC=0 -DECB=1
#define CBC 1
#define ECB 1
#include "aes.h"
static void phex(uint8_t* str);
static void test_encrypt_ecb(void);
static void test_decrypt_ecb(void);
static void test_encrypt_ecb_verbose(void);
static void test_encrypt_cbc(void);
static void test_decrypt_cbc(void);
int main(int argc, char *argv[]) {
int i;
for (i = 0; i < argc; i++)
printf("i = %d, argv = %s\n", i, argv[i]);
if (argc < 4)
printf("missing args: input_text passphrase function\n");
else {
/*
... argv[1]; input_string
... argv[2]; passphrase
... argv[3]; function
*/
//encode if e
if( argv[3] == "e" ){
printf("encoded: " + encode(argv[1], argv[2]) );
} else { //decode else
printf("decoded: " + decode(argv[1], argv[2]) );
}
//printf("input: " + input);
}
return 0;
}
// prints string as hex
static void phex(uint8_t* str)
{
unsigned char i;
for(i = 0; i < 16; ++i)
printf("%.2x", str[i]);
printf("\n");
}
static void test_encrypt_ecb_verbose(void)
{
// Example of more verbose verification
uint8_t i, buf[64], buf2[64];
// 128bit key
uint8_t key[16] = { (uint8_t) 0x2b, (uint8_t) 0x7e, (uint8_t) 0x15, (uint8_t) 0x16, (uint8_t) 0x28, (uint8_t) 0xae, (uint8_t) 0xd2, (uint8_t) 0xa6, (uint8_t) 0xab, (uint8_t) 0xf7, (uint8_t) 0x15, (uint8_t) 0x88, (uint8_t) 0x09, (uint8_t) 0xcf, (uint8_t) 0x4f, (uint8_t) 0x3c };
// 512bit text
uint8_t plain_text[64] = { (uint8_t) 0x6b, (uint8_t) 0xc1, (uint8_t) 0xbe, (uint8_t) 0xe2, (uint8_t) 0x2e, (uint8_t) 0x40, (uint8_t) 0x9f, (uint8_t) 0x96, (uint8_t) 0xe9, (uint8_t) 0x3d, (uint8_t) 0x7e, (uint8_t) 0x11, (uint8_t) 0x73, (uint8_t) 0x93, (uint8_t) 0x17, (uint8_t) 0x2a,
(uint8_t) 0xae, (uint8_t) 0x2d, (uint8_t) 0x8a, (uint8_t) 0x57, (uint8_t) 0x1e, (uint8_t) 0x03, (uint8_t) 0xac, (uint8_t) 0x9c, (uint8_t) 0x9e, (uint8_t) 0xb7, (uint8_t) 0x6f, (uint8_t) 0xac, (uint8_t) 0x45, (uint8_t) 0xaf, (uint8_t) 0x8e, (uint8_t) 0x51,
(uint8_t) 0x30, (uint8_t) 0xc8, (uint8_t) 0x1c, (uint8_t) 0x46, (uint8_t) 0xa3, (uint8_t) 0x5c, (uint8_t) 0xe4, (uint8_t) 0x11, (uint8_t) 0xe5, (uint8_t) 0xfb, (uint8_t) 0xc1, (uint8_t) 0x19, (uint8_t) 0x1a, (uint8_t) 0x0a, (uint8_t) 0x52, (uint8_t) 0xef,
(uint8_t) 0xf6, (uint8_t) 0x9f, (uint8_t) 0x24, (uint8_t) 0x45, (uint8_t) 0xdf, (uint8_t) 0x4f, (uint8_t) 0x9b, (uint8_t) 0x17, (uint8_t) 0xad, (uint8_t) 0x2b, (uint8_t) 0x41, (uint8_t) 0x7b, (uint8_t) 0xe6, (uint8_t) 0x6c, (uint8_t) 0x37, (uint8_t) 0x10 };
memset(buf, 0, 64);
memset(buf2, 0, 64);
// print text to encrypt, key and IV
printf("ECB encrypt verbose:\n\n");
printf("plain text:\n");
for(i = (uint8_t) 0; i < (uint8_t) 4; ++i)
{
phex(plain_text + i * (uint8_t) 16);
}
printf("\n");
printf("key:\n");
phex(key);
printf("\n");
// print the resulting cipher as 4 x 16 byte strings
printf("ciphertext:\n");
for(i = 0; i < 4; ++i)
{
AES128_ECB_encrypt(plain_text + (i*16), key, buf+(i*16));
phex(buf + (i*16));
}
printf("\n");
}
static void test_encrypt_ecb(void)
{
uint8_t key[] = {0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c};
uint8_t in[] = {0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a};
uint8_t out[] = {0x3a, 0xd7, 0x7b, 0xb4, 0x0d, 0x7a, 0x36, 0x60, 0xa8, 0x9e, 0xca, 0xf3, 0x24, 0x66, 0xef, 0x97};
uint8_t buffer[16];
AES128_ECB_encrypt(in, key, buffer);
printf("ECB decrypt: ");
if(0 == memcmp((char*) out, (char*) buffer, 16))
{
printf("SUCCESS!\n");
}
else
{
printf("FAILURE!\n");
}
}
static void test_decrypt_cbc(void)
{
// Example "simulating" a smaller buffer...
uint8_t key[] = { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c };
uint8_t iv[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f };
uint8_t in[] = { 0x76, 0x49, 0xab, 0xac, 0x81, 0x19, 0xb2, 0x46, 0xce, 0xe9, 0x8e, 0x9b, 0x12, 0xe9, 0x19, 0x7d,
0x50, 0x86, 0xcb, 0x9b, 0x50, 0x72, 0x19, 0xee, 0x95, 0xdb, 0x11, 0x3a, 0x91, 0x76, 0x78, 0xb2,
0x73, 0xbe, 0xd6, 0xb8, 0xe3, 0xc1, 0x74, 0x3b, 0x71, 0x16, 0xe6, 0x9e, 0x22, 0x22, 0x95, 0x16,
0x3f, 0xf1, 0xca, 0xa1, 0x68, 0x1f, 0xac, 0x09, 0x12, 0x0e, 0xca, 0x30, 0x75, 0x86, 0xe1, 0xa7 };
uint8_t out[] = { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10 };
uint8_t buffer[64];
AES128_CBC_decrypt_buffer(buffer+0, in+0, 16, key, iv);
AES128_CBC_decrypt_buffer(buffer+16, in+16, 16, 0, 0);
AES128_CBC_decrypt_buffer(buffer+32, in+32, 16, 0, 0);
AES128_CBC_decrypt_buffer(buffer+48, in+48, 16, 0, 0);
printf("CBC decrypt: ");
if(0 == memcmp((char*) out, (char*) buffer, 64))
{
printf("SUCCESS!\n");
}
else
{
printf("FAILURE!\n");
}
}
static void test_encrypt_cbc(void)
{
uint8_t key[] = { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c };
uint8_t iv[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f };
uint8_t in[] = { 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10 };
uint8_t out[] = { 0x76, 0x49, 0xab, 0xac, 0x81, 0x19, 0xb2, 0x46, 0xce, 0xe9, 0x8e, 0x9b, 0x12, 0xe9, 0x19, 0x7d,
0x50, 0x86, 0xcb, 0x9b, 0x50, 0x72, 0x19, 0xee, 0x95, 0xdb, 0x11, 0x3a, 0x91, 0x76, 0x78, 0xb2,
0x73, 0xbe, 0xd6, 0xb8, 0xe3, 0xc1, 0x74, 0x3b, 0x71, 0x16, 0xe6, 0x9e, 0x22, 0x22, 0x95, 0x16,
0x3f, 0xf1, 0xca, 0xa1, 0x68, 0x1f, 0xac, 0x09, 0x12, 0x0e, 0xca, 0x30, 0x75, 0x86, 0xe1, 0xa7 };
uint8_t buffer[64];
AES128_CBC_encrypt_buffer(buffer, in, 64, key, iv);
printf("CBC encrypt: ");
if(0 == memcmp((char*) out, (char*) buffer, 64))
{
printf("SUCCESS!\n");
}
else
{
printf("FAILURE!\n");
}
}
static void test_decrypt_ecb(void)
{
uint8_t key[] = {0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c};
uint8_t in[] = {0x3a, 0xd7, 0x7b, 0xb4, 0x0d, 0x7a, 0x36, 0x60, 0xa8, 0x9e, 0xca, 0xf3, 0x24, 0x66, 0xef, 0x97};
uint8_t out[] = {0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a};
uint8_t buffer[16];
AES128_ECB_decrypt(in, key, buffer);
printf("ECB decrypt: ");
if(0 == memcmp((char*) out, (char*) buffer, 16))
{
printf("SUCCESS!\n");
}
else
{
printf("FAILURE!\n");
}
}
答案 0 :(得分：0)
如您在问题中所述：
目标：
使用密码对字符串进行编码/解码：
应用程序因此需要接受 3个输入参数 ...
输入字符串（要编码）（明文）
或已编码的字符串（待解码）（密文）
密码短语，用于使用编码或解码指示符对字符串进行编码/解码
这是AES源代码，文件对于我来说太长了，但是总共有4个文件：
http://www.efgh.com/software/rijndael.htm
http://www.efgh.com/software/rijndael.txt
这些是：
encrypt.c
decrypt.c
rijndael.h
rijndael.c
http://www.efgh.com/software/rijndael.txt
将有以下4行分隔文件：
（在这里，制作4个具有=分隔=内容的文件）
因此，为了展示一个简短的示例， RIJNDAEL.H 文件， 具有以下内容：
//=============================== RIJNDAEL.H ===============================
#ifndef H__RIJNDAEL
#define H__RIJNDAEL
int rijndaelSetupEncrypt(unsigned long *rk, const unsigned char *key,
int keybits);
int rijndaelSetupDecrypt(unsigned long *rk, const unsigned char *key,
int keybits);
void rijndaelEncrypt(const unsigned long *rk, int nrounds,
const unsigned char plaintext[16], unsigned char ciphertext[16]);
void rijndaelDecrypt(const unsigned long *rk, int nrounds,
const unsigned char ciphertext[16], unsigned char plaintext[16]);
#define KEYLENGTH(keybits) ((keybits)/8)
#define RKLENGTH(keybits) ((keybits)/8+28)
#define NROUNDS(keybits) ((keybits)/32+6)
#endif
============================== DECRYPT.C =========== ====================
============================== ENCRYPT.C =========== ====================
============================== RIJNDAEL.C =========== ====================
============================== RIJNDAEL.H =========== ====================
对每个文件crypto.c，decrypt.c rijndael.c和最终rijndael.h都执行此操作。
测试结果：
$ gcc -o AES_ENCRYPT RIJNDAEL.C ENCRYPT.C
$ gcc -o AES_DECRYPT RIJNDAEL.C DECRYPT.C
加密邮件 “您要加密的秘密消息在这里。（纯文本）”
到输出文件“ EncodedOutputFile”
$ ./AES_ENCRYPT MySecurePassword123 EncodedOutputFile
Your secret message to be encrypted goes here. (The plaintext)
CTRL + D to stop.
要解密密文（加密的文件“ EncodedOutputFile”）：
$ ./AES_DECRYPT MySecurePassword123 EncodedOutputFile
这是输出
Your secret message to be encrypted goes here. (The plaintext) CTRL + D to stop.