1 files changed, 114 insertions, 0 deletions
diff --git a/moon-abe/pbc-0.5.14/example/paterson.c b/moon-abe/pbc-0.5.14/example/paterson.c
new file mode 100644
index 00000000..4e21fc9f
--- /dev/null
+++ b/moon-abe/pbc-0.5.14/example/paterson.c
@@ -0,0 +1,114 @@
+/*
+  Paterson ID-based signature.
+  Based on papers "K. G. Paterson. ID-Based Signatures from Pairings on Elliptic Curvers. Electron. Lett., Vol. 38". Available at http://eprint.iacr.org/2002/004."
+  Contributed by Dmitry Kosolapov.
+*/
+
+#include <pbc.h>
+#include <pbc_test.h>
+
+int main(int argc, char **argv) {
+  pairing_t pairing;
+  double time1, time2;
+  element_t Ppub, s, P, R, k, S, Did, Qid, t1, t2, t4, t5, t6, t7, t8,
+    t9, t10, t11;
+  mpz_t t3;
+  mpz_init(t3);
+  pbc_demo_pairing_init(pairing, argc, argv);
+  if (!pairing_is_symmetric(pairing)) pbc_die("pairing must be symmetric");
+
+  element_init_G1(P, pairing);
+  element_init_G1(Ppub, pairing);
+  element_init_G1(Qid, pairing);
+  element_init_G1(Did, pairing);
+  element_init_G1(R, pairing);
+  element_init_G1(S, pairing);
+  element_init_G1(t2, pairing);
+  element_init_G1(t4, pairing);
+  element_init_G1(t5, pairing);
+  element_init_G1(t7, pairing);
+
+  element_init_Zr(s, pairing);
+  element_init_Zr(k, pairing);
+  element_init_Zr(t1, pairing);
+
+  element_init_GT(t6, pairing);
+  element_init_GT(t8, pairing);
+  element_init_GT(t9, pairing);
+  element_init_GT(t10, pairing);
+  element_init_GT(t11, pairing);
+
+  time1 = pbc_get_time();
+  printf("Paterson ID-based signature.\n");
+  printf("KEYGEN\n");
+  element_random(P);
+  element_random(s);
+  element_mul_zn(Ppub, P, s);
+  element_printf("P = %B\n", P);
+  element_printf("Ppub = %B\n", Ppub);
+  element_from_hash(Qid, "ID", 2);
+  element_printf("Qid = %B\n", Qid);
+  element_mul_zn(Did, Qid, s);
+
+  printf("SIGN\n");
+  element_random(k);
+  element_mul_zn(R, P, k);
+  element_from_hash(t1, "Message", 7);
+  element_mul_zn(t2, P, t1);
+  //H3(R)=mpz(R);
+//  int n = element_length_in_bytes(R);
+//  unsigned char *data=malloc(n);
+//  element_to_bytes(data, R);
+//  printf("data = %s\n", data);
+  element_to_mpz(t3, R);
+  element_mul_mpz(t4, Did, t3);
+  element_add(t5, t4, t2);
+  element_invert(k, k);
+  element_mul_zn(S, t5, k);
+  printf("Signature of message \"Message\" is:\n");
+  element_printf("R = %B\n", R);
+  element_printf("S = %B\n", S);
+
+  printf("VERIFY\n");
+  element_from_hash(t1, "Message", 7);
+  element_mul_zn(t7, P, t1);
+  element_pairing(t6, P, t7);
+  element_pairing(t8, Ppub, Qid);
+  element_to_mpz(t3, R);
+  element_pow_mpz(t9, t8, t3);
+  element_printf("t8 = %B\n", t8);
+  element_printf("t9 = %B\n", t9);
+  element_mul(t10, t6, t9);
+  element_printf("t10 = %B\n", t10);
+  element_pairing(t11, R, S);
+  element_printf("[e(P, P)^H2(M)][e(Ppub, Qid)^H3(R)] = %B\n", t10);
+  element_printf("e(R, S) = %B\n", t11);
+  if (!element_cmp(t10, t11)) {
+    printf("Signature is valid!\n");
+  } else {
+    printf("Signature is invalid!\n");
+  }
+  time2 = pbc_get_time();
+  printf("All time = %fs\n", time2 - time1);
+
+  element_clear(P);
+  element_clear(Ppub);
+  element_clear(Qid);
+  element_clear(Did);
+  element_clear(R);
+  element_clear(t2);
+  element_clear(t4);
+  element_clear(t5);
+  element_clear(s);
+  element_clear(k);
+  element_clear(t1);
+  element_clear(t6);
+  element_clear(t7);
+  element_clear(t8);
+  element_clear(t9);
+  element_clear(t10);
+  element_clear(t11);
+  pairing_clear(pairing);
+
+  return 0;
+}