init attribute-based encryption

Change-Id: Iba1a3d722110abf747a0fba366f3ebc911d25b25

1 files changed, 35 insertions, 0 deletions

diff --git a/moon-abe/pbc-0.5.14/gen/gendparam.c b/moon-abe/pbc-0.5.14/gen/gendparam.c
new file mode 100644
index 00000000..8506e52a
--- /dev/null
+++ b/moon-abe/pbc-0.5.14/gen/gendparam.c
@@ -0,0 +1,35 @@
+// Generate MNT curve(s) for a given D.
+
+#include <stdint.h> // for intptr_t
+#include "pbc.h"
+#include "pbc_utils.h"  // for UNUSED_VAR
+
+int generate(pbc_cm_t cm, void *data) {
+  UNUSED_VAR(data);
+  pbc_param_t param;
+  pbc_info("gendparam: computing Hilbert polynomial and finding roots...");
+  pbc_param_init_d_gen(param, cm);
+  pbc_info("gendparam: bits in q = %zu\n", mpz_sizeinbase(cm->q, 2));
+  pbc_param_out_str(stdout, param);
+  pbc_param_clear(param);
+  return 1;
+}
+
+int main(int argc, char **argv) {
+  int D = 9563;
+
+  if (argc > 1) {
+    int m;
+    D = atoi(argv[1]);
+    m = D % 4;
+    if (D <= 0 || m == 1 || m == 2) {
+      pbc_die("D must be 0 or 3 mod 4 and positive");
+    }
+  }
+  pbc_info("Using D = %d\n", D);
+
+  if (!pbc_cm_search_d(generate, NULL, D, 500)) {
+    pbc_die("no suitable curves for this D");
+  }
+  return 0;
+}