C++OPENSSL-如何将OPENSSL输出转换为可读文本并存储到变量中(如果可能的话)

Question

我有正在使用OPENSSL AES 256 CBC加密/解密的代码。它正在工作，但我错过了一件非常重要的事情，那就是将加密结果转换为可读文本，并在可能的情况下将其存储为STRING变量(供以后使用(。例如，我需要看到这样的东西：UkV8ecEWh+b1Dz0ZdwMzFVFieCI5Ps3fxYrfqAoPmOY=正在努力寻找如何做到这一点，以及OPENSSL从加密过程中抛出了什么格式。(二进制格式？？(请参阅所附图片。

ps。不要担心下面的散列。它们没有生产

提前感谢！！

这是我迄今为止的代码：

#include <iostream>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <openssl/evp.h>
#include <openssl/aes.h>
#include <openssl/rand.h>

using namespace std;

// HEX PRINT
static void hex_print(const void* pv, size_t len)
{
const unsigned char* p = (const unsigned char*)pv;
if (NULL == pv)
printf("NULL");
else
{
size_t i = 0;
for (; i < len; ++i)
printf("%02X ", *p++);
}
printf("n");
}

// Starting MAIN function
int main()
{
int keylength = 256;
unsigned char aes_key[] =  "1Tb2lYkqstqbh9lPAbeWpQOs3seHk6cX";
// Message we want to encrypt
unsigned char aes_input[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890 abcdefghijklmnopqrstuvwxyz";

size_t inputslength = sizeof(aes_input)-1;   // -1 because we don't want to encrypt the  character

// initialization vector  IV - same for Encryption and Decryption
unsigned char iv_enc[] =  "JxebB512Gl3brfx4" ;
unsigned char iv_dec[] =  "JxebB512Gl3brfx4" ;

// buffers for encryption and decryption
const size_t encslength = inputslength ;
unsigned char enc_out[257];
unsigned char dec_out[257];
memset(enc_out, 0, sizeof(enc_out));
memset(dec_out, 0, sizeof(dec_out));
//Encryption START
AES_KEY enc_key, dec_key;
AES_set_encrypt_key(aes_key, keylength, &enc_key);
AES_cbc_encrypt(aes_input, enc_out, inputslength, &enc_key, iv_enc, AES_ENCRYPT);

//Decryption START
AES_set_decrypt_key(aes_key, keylength, &dec_key);
AES_cbc_encrypt(enc_out, dec_out, encslength, &dec_key, iv_dec, AES_DECRYPT);

// Printing Results
printf("original: t");
hex_print(aes_input, sizeof(aes_input));
cout << aes_input << endl;
printf("encrypted: t");
hex_print(enc_out, sizeof(enc_out));
cout << enc_out << endl;

printf("decrypt: t");
hex_print(dec_out, sizeof(dec_out));
cout << dec_out << endl;



return 0;
}

过程的图像

Answer 1

好的。感谢RemyLebeau和PaulSanders的提示！！我可以使用这里的另一个提示来解决这个问题-->Base64 C++

现在工作真的很好！！

非常感谢！！

这是"；编码"；以及"；解码"；Base64，以防有人也想这么做。非常有用！！

typedef unsigned char uchar;
static const string b = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static string base64_encode(const string &in) {
string out;
int val=0, valb=-6;
for (uchar c : in) {
val = (val<<8) + c;
valb += 8;
while (valb>=0) {
out.push_back(b[(val>>valb)&0x3F]);
valb-=6;
}
}
if (valb>-6) out.push_back(b[((val<<8)>>(valb+8))&0x3F]);
while (out.size()%4) out.push_back('=');
return out;
}
static string base64_decode(const string &in) {
string out;
vector<int> T(256,-1);
for (int i=0; i<64; i++) T[b[i]] = i;
int val=0, valb=-8;
for (uchar c : in) {
if (T[c] == -1) break;
val = (val<<6) + T[c];
valb += 6;
if (valb>=0) {
out.push_back(char((val>>valb)&0xFF));
valb-=8;
}
}
return out;
}