add bid encryption

2 files changed, 21 insertions, 4 deletions

diff --git a/crypto.c b/crypto.c
index 537dd66..186a704 100644
--- a/crypto.c
+++ b/crypto.c
@@ -336,7 +336,7 @@ smc_init3 (uint16_t size1, uint16_t size2, uint16_t size3)
 	brandt_assert (NULL != ret);
 
 	layer1 = (gcry_mpi_point_t **)&ret[size1];
-	layer2 = (gcry_mpi_point_t *)&layer1[size1*size2];
+	layer2 = (gcry_mpi_point_t *)&layer1[size1 * size2];
 	for (i = 0; i < size1; i++)
 	{
 		ret[i] = &layer1[i * size2];
@@ -430,7 +430,7 @@ smc_gen_keyshare (struct AuctionData *ad)
 {
 	uint16_t i;
 
-	ad->y = calloc(ad->n, sizeof(*ad->y));
+	ad->y = calloc (ad->n, sizeof (*ad->y));
 	for (i = 0; i < ad->n; i++)
 		ad->y[0] = gcry_mpi_point_new (0);
 
@@ -439,6 +439,24 @@ smc_gen_keyshare (struct AuctionData *ad)
 }
 
 
+void
+smc_encrypt_bid (struct AuctionData *ad,
+                 uint16_t           j,
+                 gcry_mpi_point_t   a1,
+                 gcry_mpi_point_t   a2,
+                 gcry_mpi_point_t   b1,
+                 gcry_mpi_point_t   b2,
+                 gcry_mpi_t         c,
+                 gcry_mpi_t         d1,
+                 gcry_mpi_t         d2,
+                 gcry_mpi_t         r1,
+                 gcry_mpi_t         r2)
+{
+	smc_zkp_0og (ad->alpha[ad->i][j], (j == ad->b ? ec_gen : ec_zero), ad->Y,
+	             ad->beta[ad->i][j], a1, a2, b1, b2, c, d1, d2, r1, r2);
+}
+
+
 /**
  * smc_zkp_dl
  *
diff --git a/internals.h b/internals.h
index f705c6d..06ec88c 100644
--- a/internals.h
+++ b/internals.h
@@ -28,13 +28,12 @@ struct AuctionData {
 	uint16_t n;                /** The amount of bidders/agents */
 	uint16_t k;                /** The amount of possible prices */
 	uint16_t i;                /** Own agents index, only used when bidding */
+	uint16_t b;                /** Own bid */
 
 	gcry_mpi_t       x;        /** Own private additive key share */
 	gcry_mpi_point_t *y;       /** public multiplicative key shares, size: n */
 	gcry_mpi_point_t Y;        /** Shared public key */
 
-	gcry_mpi_point_t *b;       /** Own bid, size: k */
-
 	gcry_mpi_point_t **alpha;  /** alphas, size: n*k */
 	gcry_mpi_point_t **beta;   /** betas, size: n*k */