linux c des加密

#include <openssl/des.h>
#include <string.h>

void des_encrypt(const unsigned char *plaintext, unsigned char *ciphertext, DES_cblock *key) {
    DES_key_schedule schedule;
    DES_set_key_unchecked(key, &schedule);
    DES_cblock iv = {0}; // 初始化向量
    DES_ncbc_encrypt(plaintext, ciphertext, strlen((char *)plaintext), &schedule, &iv, DES_ENCRYPT);
}

void des_decrypt(const unsigned char *ciphertext, unsigned char *plaintext, DES_cblock *key) {
    DES_key_schedule schedule;
    DES_set_key_unchecked(key, &schedule);
    DES_cblock iv = {0}; // 初始化向量
    DES_ncbc_encrypt(ciphertext, plaintext, strlen((char *)ciphertext), &schedule, &iv, DES_DECRYPT);
}

int main() {
    unsigned char key[8] = "12345678"; // 8字节密钥
    unsigned char plaintext[] = "Hello, World!";
    unsigned char ciphertext[sizeof(plaintext)];
    unsigned char decryptedtext[sizeof(plaintext)];

    des_encrypt(plaintext, ciphertext, (DES_cblock *)key);
    des_decrypt(ciphertext, decryptedtext, (DES_cblock *)key);

    printf("Original: %s\n", plaintext);
    printf("Decrypted: %s\n", decryptedtext);

    return 0;
}