Function EncipherBlock

src/_PlatformBase.h:275–287

Encrypts data using XTEA block cipher, with OS specific method to get machine-specific key */

/* Encrypts data using XTEA block cipher, with OS specific method to get machine-specific key */
static void EncipherBlock(cc_uint32* v, const cc_uint32* key, cc_string* dst) {
	cc_uint32 v0 = v[0], v1 = v[1], sum = 0, delta = 0x9E3779B9;
	int i;

	for (i = 0; i < 12; i++) 
	{
		v0  += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + key[sum & 3]);
		sum += delta;
		v1  += (((v0 << 4) ^ (v0 >> 5)) + v0) ^ (sum + key[(sum>>11) & 3]);
	}
	v[0] = v0; v[1] = v1;
	String_AppendAll(dst, v, 8);
}

static void DecipherBlock(cc_uint32* v, const cc_uint32* key) {
	cc_uint32 v0 = v[0], v1 = v[1], delta = 0x9E3779B9, sum = delta * 12;