aes解码和base64解码 c++代码

AES解码和Base64解码是两种不同的编码方式。AES是一种对称加密算法，用于加密和解密数据，而Base64是一种编码方式，用于将二进制数据转换为可打印字符。以下是C++代码示例：

AES解码：

#include <iostream>
#include <openssl/aes.h>

int main()
{
    unsigned char key[] = "01234567890123456789012345678901";
    unsigned char iv[] = "0123456789012345";
    unsigned char ciphertext[] = "ciphertext";
    unsigned char decryptedtext[128];

    AES_KEY aesKey;
    AES_set_decrypt_key(key, 256, &aesKey);
    AES_cbc_encrypt(ciphertext, decryptedtext, sizeof(ciphertext), &aesKey, iv, AES_DECRYPT);

    std::cout << decryptedtext << std::endl;

    return 0;
}

Base64解码：

#include <iostream>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/buffer.h>

int main()
{
    std::string encodedText = "SGVsbG8gV29ybGQh";
    BIO *bio, *b64;
    b64 = BIO_new(BIO_f_base64());    bio = BIO_new_mem_buf(encodedText.c_str(), -1);
    bio = BIO_push(b64, bio);

    char decodedText[128];
    int len = BIO_read(bio, decodedText, sizeof(decodedText));

    BIO_free_all(bio);

    std::cout << std::string(decodedText, len) << std::endl;

    return 0;
}