c++ AES/ECB/PKCS5PADDING

您可以使用 OpenSSL 库来实现 C++ 中的 AES/ECB/PKCS5PADDING 加密。以下是一个简单的示例代码：

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

void encrypt(unsigned char *plaintext, int plaintext_len, unsigned char *key,
             unsigned char *iv, unsigned char *ciphertext) {
  AES_KEY aes_key;
  AES_set_encrypt_key(key, 128, &aes_key);
  AES_encrypt(plaintext, ciphertext, &aes_key);
}

void decrypt(unsigned char *ciphertext, int ciphertext_len, unsigned char *key,
             unsigned char *iv, unsigned char *plaintext) {
  AES_KEY aes_key;
  AES_set_decrypt_key(key, 128, &aes_key);
  AES_decrypt(ciphertext, plaintext, &aes_key);
}

int main() {
  unsigned char key[] = "0123456789abcdef";
  unsigned char iv[] = "0123456789abcdef";
  unsigned char plaintext[] = "Hello, world!";
  int plaintext_len = strlen((char *)plaintext);

  // 加密
  unsigned char ciphertext[plaintext_len];
  encrypt(plaintext, plaintext_len, key, iv, ciphertext);

  // 解密
  unsigned char decryptedtext[plaintext_len];
  decrypt(ciphertext, plaintext_len, key, iv, decryptedtext);

  // 输出结果
  printf("原文: %s\n", plaintext);
  printf("密文: ");
  for (int i = 0; i < plaintext_len; i++) {
    printf("%02x", ciphertext[i]);
  }
  printf("\n");
  printf("解密后: %s\n", decryptedtext);

  return 0;
}