/*
	Tiny Encryption Algorithm
	Public domain
*/	


void encrypt(unsigned long* v, unsigned long* k) {
     unsigned long v0=v[0], v1=v[1], sum=0, i;           /* set up */
     unsigned long delta=0x9e3779b9;                     /* a key schedule constant */
     unsigned long k0=k[0], k1=k[1], k2=k[2], k3=k[3];   /* cache key */
     for (i=0; i < 32; i++) {                            /* basic cycle start */
         sum += delta;
         v0 += (v1<<4)+k0 ^ v1+sum ^ (v1>>5)+k1;
         v1 += (v0<<4)+k2 ^ v0+sum ^ (v0>>5)+k3;         /* end cycle */
     }
     v[0]=v0; v[1]=v1;
 }
 
 void decrypt(unsigned long* v, unsigned long* k) {
     unsigned long v0=v[0], v1=v[1], sum=0xC6EF3720, i;  /* set up */
     unsigned long delta=0x9e3779b9;                     /* a key schedule constant */
     unsigned long k0=k[0], k1=k[1], k2=k[2], k3=k[3];   /* cache key */
     for(i=0; i<32; i++) {                               /* basic cycle start */
         v1 -= (v0 << 4)+k2 ^ v0+sum ^ (v0 >> 5)+k3;
         v0 -= (v1 << 4)+k0 ^ v1+sum ^ (v1 >> 5)+k1;
         sum -= delta;                                   /* end cycle */
     }
     v[0]=v0; v[1]=v1;
 }