#include <stdio.h>
#include <assert.h>
#include <openssl/evp.h>
#include <openssl/bio.h>

char data[] = { 0xd7, 0x40, 0x9c, 0xe9, 0x81, 0xff, 0x41, 0xf1, 0xf8, 0x61, 0xf5, 0xa9, 0x36, 0x99, 0x5b, 0x07 };
char key[]  = { 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c };
char iv[]   = { 0xa7, 0x6d, 0x93, 0x36, 0x53, 0xcb, 0x19, 0x1d, 0xe0, 0xb5, 0xef, 0x78, 0x97, 0x27, 0xfc, 0x64 };


int main(int argc, char **argv)
{
        int r;

        OpenSSL_add_all_digests();
        OpenSSL_add_all_ciphers();

        BIO *bio;

        if(1) {
                bio = BIO_new(BIO_s_mem());
                r = BIO_write(bio, data, sizeof(data));
                assert(r == sizeof(data));
        } else {
                FILE *f = fopen("/tmp/flop", "w");
                fwrite(data, 1, sizeof(data), f);
                fclose(f);
                bio = BIO_new_file("/tmp/flop", "r");
        }

        BIO *bio_dec = BIO_new(BIO_f_cipher());
        BIO_set_cipher(bio_dec, EVP_aes_128_cbc(), key, iv, 0);
        BIO_push(bio_dec, bio);

        char flop[2048];

        r = BIO_read(bio_dec, flop, sizeof flop-1);
        assert(r != -1);
        flop[r] = '\0';

        printf("r=%d '%s'\n", r, flop+2);

        return 0;
}