[技术交流] *我的*Pass

#include <stdio.h>
#include <ctype.h>
#include <nettle/pbkdf2.h>
#include <nettle/aes.h>
#include <nettle/eax.h>
#include <unistd.h>
#define PassLength 8
#define SaltLength 64
#define NonceLength 16
#define Iterations 1310720
int main(){
    const uint8_t salt[SaltLength] = {
        0xf9, 0xa4, 0xe3, 0xf1, 0x85, 0x10, 0xfb, 0x5c, 0x49, 0x7c, 0xb2, 0xfd,
        0x37, 0xdc, 0x8e, 0x4a, 0xaf, 0x65, 0x98, 0xbc, 0xf0, 0x24, 0xd2, 0x54,
        0x87, 0x93, 0x7e, 0x40, 0xca, 0x51, 0xdf, 0x8c, 0xab, 0xa3, 0xe6, 0xca,
        0x62, 0xa7, 0xdd, 0xda, 0x79, 0x37, 0x18, 0x21, 0x87, 0xe0, 0x4d, 0x2c,
        0xd8, 0xe1, 0xef, 0xac, 0x19, 0x3a, 0x69, 0x98, 0x42, 0x92, 0x23, 0x01,
        0xad, 0xe9, 0x47, 0x77
    };
    const uint8_t nonce[NonceLength] = {
        0x03, 0xfe, 0x52, 0x82, 0xd1, 0x5d, 0x2a, 0x31, 0xf2, 0x09, 0x84, 0x69,
        0x5b, 0x68, 0x31, 0xa1
    };
    const uint8_t data[20] = {
        0xd9, 0x0d, 0x6f, 0xc3, 0x39, 0x39, 0x36, 0x80, 0x61, 0x2f, 0x6b, 0xed,
        0x0e, 0x67, 0x94, 0xc0, 0x18, 0x3e, 0x75, 0xbb
    };
    const uint8_t digest[EAX_DIGEST_SIZE] = {
        0x36, 0x3c, 0x51, 0x82, 0x4e, 0x3b, 0xce, 0x36, 0x9c, 0xac, 0x72, 0x44,
        0x09, 0xbb, 0x31, 0x84
    };
    uint8_t pass[PassLength] = {0x31, 0x30, 0x30, 0x30, 0x38, 0x33, 0x33, 0x38};
    uint8_t key[AES256_KEY_SIZE];
    uint8_t result[20];
    uint8_t input_digest[EAX_DIGEST_SIZE];
    int flag = 0;
    struct aes256_ctx aes_ctx;
    struct eax_key eax_key;
    struct eax_ctx eax_ctx;
    printf("Enter pass: ");
    if(fread(pass, PassLength, 1, stdin) != 1) flag = 1;
    for(int i = 0; i < PassLength; ++i) if(!isdigit(pass[i])) flag = 1;
    pbkdf2_hmac_sha512(PassLength, pass, Iterations, SaltLength, salt, AES256_KEY_SIZE, key);
    aes256_set_encrypt_key(&aes_ctx, key);
    eax_set_key(&eax_key, &aes_ctx, aes256_encrypt);
    eax_set_nonce(&eax_ctx, &eax_key, &aes_ctx, aes256_encrypt, NonceLength, nonce);
    eax_decrypt(&eax_ctx, &eax_key, &aes_ctx, aes256_encrypt, 20, result, data);
    eax_digest(&eax_ctx, &eax_key, &aes_ctx, aes256_encrypt, EAX_DIGEST_SIZE, input_digest);
    for(size_t i = 0; i < EAX_DIGEST_SIZE; ++i) flag |= digest[i] ^ input_digest[i];
    if(flag){
        sleep(3);
        printf("Pass failed.\n");
    }else{
        printf("Pass succeed.\n");
        printf("%s\n", result);
    }
    return 0;
}