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#ifndef __LIB2_H__
#define __LIB2_H__
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <openssl/aes.h>
char *pkcs7_padding(char *string, int length_string, int blocksize);
int aes_cbc(char *in, int length_in, char *out, unsigned char *string_key, char *init_vector, int encrypt);
int valid_pkcs7_padding(const char *in, int length_in, char *unpadded, int blocksize);
int aes_ecb(char *in, int length_in, char *out, unsigned char *string_key,
int blocksize, int encrypt);
#endif
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