int SHA224_Init (SHA256_CTX *c)
	{
	memset (c,0,sizeof(*c));
	c->h[0]=0xc1059ed8UL;	c->h[1]=0x367cd507UL;
	c->h[2]=0x3070dd17UL;	c->h[3]=0xf70e5939UL;
	c->h[4]=0xffc00b31UL;	c->h[5]=0x68581511UL;
	c->h[6]=0x64f98fa7UL;	c->h[7]=0xbefa4fa4UL;
	c->md_len=SHA224_DIGEST_LENGTH;
	return 1;
	}