View difference between Paste ID: cAzxeBYQ and TLTyFyQQ

 #include <stdio.h>
 #include <openssl/evp.h>
 #include <unistd.h>
 #include <assert.h>
 #include <string.h>
 
 
 int main(int argc, char* argv[]) {
     EVP_CIPHER_CTX* context = EVP_CIPHER_CTX_new();
 
     int salt_size = 8;
     unsigned char salt[salt_size];
     fread(salt, sizeof(unsigned char), salt_size, stdin);
     fread(salt, sizeof(unsigned char), salt_size, stdin);
 
     //unsigned char preamble[16];
     //read(STDIN_FILENO, preamble, sizeof(preamble));
     //unsigned char salt[8];
     //memcpy(salt, preamble + 8, sizeof(salt));
 
     printf("INPUT : %s\n", salt);
     fflush(stdout);
 
     unsigned char key[32];
     unsigned char init_value[16];
     EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha256(), salt, argv[1], strlen(argv[1]), 1, key, init_value);
     EVP_DecryptInit(context, EVP_aes_256_cbc(), key, init_value);
 
     int buff_size = EVP_CIPHER_CTX_block_size(context);
     unsigned char buffer[buff_size];
     int readed = fread((void*)buffer, sizeof(unsigned char), buff_size, stdin);
 
     int out_size = EVP_CIPHER_CTX_block_size(context);
     unsigned char out[out_size];
     int written;
 
     while(readed > 0 || written > 0) {
         assert(EVP_DecryptUpdate(context, out, &written, buffer, readed) > 0);
         //printf("%d\n", written);
         fflush(stdout);
         printf("%.*s", written, out);
         //fwrite((void*)out, sizeof(unsigned char), written, stdout);
         fflush(stdout);
         //printf("here");
         readed = fread((void*)buffer, sizeof(unsigned char), buff_size, stdin);
     }
 
     EVP_DecryptFinal(context, out, &written);
 
     printf("%.*s", written, out);
     fflush(stdout);
     EVP_CIPHER_CTX_free(context);
 }