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author | 2015-09-04 09:25:34 +0200 | |
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committer | 2015-09-04 09:25:34 +0200 | |
commit | 3baeb11a8fbcfcdbc31976d421f17b85503b3ecd (patch) | |
tree | 04891d88c1127148f1b390b5a24414e85b270aee /moon-abe/pbc-0.5.14/example/paterson.c | |
parent | 67c5b73910f5fc437429c356978081b252a59480 (diff) |
init attribute-based encryption
Change-Id: Iba1a3d722110abf747a0fba366f3ebc911d25b25
Diffstat (limited to 'moon-abe/pbc-0.5.14/example/paterson.c')
-rw-r--r-- | moon-abe/pbc-0.5.14/example/paterson.c | 114 |
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; +} |