init attribute-based encryption

Change-Id: Iba1a3d722110abf747a0fba366f3ebc911d25b25

1 files changed, 33 insertions, 0 deletions

diff --git a/moon-abe/pbc-0.5.14/gen/gengparam.c b/moon-abe/pbc-0.5.14/gen/gengparam.c
new file mode 100644
index 00000000..064f2b76
--- /dev/null
+++ b/moon-abe/pbc-0.5.14/gen/gengparam.c
@@ -0,0 +1,33 @@
+// Generate Freeman curves with a given discriminant.
+#include "pbc.h"
+
+int generate(pbc_cm_t cm, void *data) {
+  UNUSED_VAR(data);
+  pbc_param_t param;
+
+  pbc_info("gengparam: computing Hilbert polynomial and finding roots...");
+  pbc_param_init_g_gen(param, cm);
+  pbc_info("gengparam: bits in q = %zu", 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 = 35707;
+
+  if (argc > 1) {
+    int m;
+    D = atoi(argv[1]);
+    m = D % 120;
+    if (D <= 0 || (m != 43 && m != 67)) {
+      pbc_die("D must be 43 or 67 mod 120 and positive");
+    }
+  }
+  pbc_info("Using D = %d", D);
+
+  if (!pbc_cm_search_g(generate, NULL, D, 500)) {
+    pbc_die("No suitable curves for this D");
+  }
+  return 0;
+}