void BroadcastKEM_using_indicies(global_broadcast_params_t gbp,
broadcast_system_t sys, ct_t myct,
int *in_recip, int num_recip, element_t key)
{
Gen_encr_prod_from_indicies(gbp, sys, in_recip, num_recip);
if(DEBUG && 0) {
printf("index product = ");
element_out_str(stdout, 0, sys->encr_prod);
printf("\n");
}
BroadcastKEM_using_product(gbp, sys, myct, key);
}
void BroadcastKEM_using_bitvec(global_broadcast_params_t gbp,
broadcast_system_t sys,
char *recip, ct_t myct, element_t key)
{
Gen_encr_prod_from_bitvec(gbp, sys, recip);
if(DEBUG && 0) {
printf("bitvec product = ");
element_out_str(stdout, 0, sys->encr_prod);
printf("\n");
}
BroadcastKEM_using_product(gbp, sys, myct, key);
}
int BCEEncrypt(byte *sys_params_path, byte *CT_C0_out, byte *CT_C1_out, byte *symmetric_key_out)
{
global_broadcast_params_t gbs;
broadcast_system_t sys;
ct_t shared_CT;
element_t symmetric_key;
int retlen;
if (sys_params_path == NULL)
return 1;
if (CT_C0_out == NULL)
return 2;
if (CT_C1_out == NULL)
return 3;
if (symmetric_key_out == NULL)
return 4;
LoadParams((char *) sys_params_path, &gbs, &sys);
shared_CT = (ct_t) pbc_malloc(sizeof(struct ciphertext_s));
BroadcastKEM_using_product(gbs, sys, shared_CT, symmetric_key);
retlen = element_to_bytes(CT_C0_out, shared_CT->C0);
if (retlen != CT_C0_LENGTH)
return 5;
retlen = element_to_bytes(CT_C1_out, shared_CT->C1);
if (retlen != CT_C1_LENGTH)
return 6;
retlen = element_to_bytes(symmetric_key_out, symmetric_key);
if (retlen != SYMMETRIC_KEY_LENGTH)
return 7;
element_random(symmetric_key);
element_clear(symmetric_key);
FreeCT(shared_CT);
pbc_free(shared_CT);
FreeBCS(sys);
pbc_free(sys);
FreeGBP(gbs);
pbc_free(gbs);
return 0;
}
