#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
#include <openssl/sha.h>

char *bin2hex(const unsigned char *p, size_t len)
{
	char *s = malloc((len * 2) + 1);
	unsigned int i;

	if (!s)
		return NULL;

	for (i = 0; i < len; i++)
		sprintf(s + (i * 2), "%02x", (unsigned int) p[i]);

	return s;
}


static inline uint32_t swab32(uint32_t v)
{
	return bswap_32(v);
}

void pack32(uint8_t *dest, uint32_t val)
{
	dest[0] = (val & 0xff000000) >> 24;
	dest[1] = (val & 0x00ff0000) >> 16;
	dest[2] = (val & 0x0000ff00) >>  8;
	dest[3] = (val & 0x000000ff)      ;
}

int main(int argc, char *argv[])
{
	unsigned char hash1[32];
	unsigned char hash2[32];
	unsigned char coinbase[200];
	memset(coinbase, sizeof(coinbase), 0);
	const char *text = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
	pack32(coinbase, 486604799); //nBits in decimal form
	pack32(coinbase+4, 66629);// This is represented as CBigNum(4) in the code
	memcpy(coinbase+8, (const unsigned char *)text, strlen(text));

	char *d = bin2hex(coinbase, strlen(text)+8);
	printf("%s\n", d);
	free(d);

	return 0;
}