3 * copy'n'pasted from http://en.wikipedia.org/wiki/XTEA
4 * and slightly modified
10 void xtea_enc(uint32_t* dest, uint32_t* v, uint32_t* k) {
11 uint32_t v0=v[0], v1=v[1], i;
12 uint32_t sum=0, delta=0x9E3779B9;
14 v0 += ((v1 << 4 ^ v1 >> 5) + v1) ^ (sum + k[sum & 3]);
16 v1 += ((v0 << 4 ^ v0 >> 5) + v0) ^ (sum + k[sum>>11 & 3]);
18 dest[0]=v0; dest[1]=v1;
21 void xtea_dec(uint32_t* dest, uint32_t* v, uint32_t* k) {
22 uint32_t v0=v[0], v1=v[1], i;
23 uint32_t sum=0xC6EF3720, delta=0x9E3779B9;
25 v1 -= ((v0 << 4 ^ v0 >> 5) + v0) ^ (sum + k[sum>>11 & 3]);
27 v0 -= ((v1 << 4 ^ v1 >> 5) + v1) ^ (sum + k[sum & 3]);
29 dest[0]=v0; dest[1]=v1;