/********************************************************************** * Copyright (c) 2015 Gregory Maxwell * * Distributed under the MIT software license, see the accompanying * * file COPYING or http://www.opensource.org/licenses/mit-license.php.* **********************************************************************/ #ifndef SECP256K1_MODULE_RANGEPROOF_TESTS #define SECP256K1_MODULE_RANGEPROOF_TESTS #include #include "group.h" #include "scalar.h" #include "testrand.h" #include "util.h" #include "include/secp256k1_rangeproof.h" static void test_pedersen_api(const secp256k1_context *none, const secp256k1_context *sign, const secp256k1_context *vrfy, const int32_t *ecount) { secp256k1_pedersen_commitment commit; const secp256k1_pedersen_commitment *commit_ptr = &commit; unsigned char blind[32]; unsigned char blind_out[32]; const unsigned char *blind_ptr = blind; unsigned char *blind_out_ptr = blind_out; uint64_t val = secp256k1_rand32(); secp256k1_rand256(blind); CHECK(secp256k1_pedersen_commit(none, &commit, blind, val, secp256k1_generator_h) == 0); CHECK(*ecount == 1); CHECK(secp256k1_pedersen_commit(vrfy, &commit, blind, val, secp256k1_generator_h) == 0); CHECK(*ecount == 2); CHECK(secp256k1_pedersen_commit(sign, &commit, blind, val, secp256k1_generator_h) != 0); CHECK(*ecount == 2); CHECK(secp256k1_pedersen_commit(sign, NULL, blind, val, secp256k1_generator_h) == 0); CHECK(*ecount == 3); CHECK(secp256k1_pedersen_commit(sign, &commit, NULL, val, secp256k1_generator_h) == 0); CHECK(*ecount == 4); CHECK(secp256k1_pedersen_commit(sign, &commit, blind, val, NULL) == 0); CHECK(*ecount == 5); CHECK(secp256k1_pedersen_blind_sum(none, blind_out, &blind_ptr, 1, 1) != 0); CHECK(*ecount == 5); CHECK(secp256k1_pedersen_blind_sum(none, NULL, &blind_ptr, 1, 1) == 0); CHECK(*ecount == 6); CHECK(secp256k1_pedersen_blind_sum(none, blind_out, NULL, 1, 1) == 0); CHECK(*ecount == 7); CHECK(secp256k1_pedersen_blind_sum(none, blind_out, &blind_ptr, 0, 1) == 0); CHECK(*ecount == 8); CHECK(secp256k1_pedersen_blind_sum(none, blind_out, &blind_ptr, 0, 0) != 0); CHECK(*ecount == 8); CHECK(secp256k1_pedersen_commit(sign, &commit, blind, val, secp256k1_generator_h) != 0); CHECK(secp256k1_pedersen_verify_tally(none, &commit_ptr, 1, &commit_ptr, 1) != 0); CHECK(secp256k1_pedersen_verify_tally(none, NULL, 0, &commit_ptr, 1) == 0); CHECK(secp256k1_pedersen_verify_tally(none, &commit_ptr, 1, NULL, 0) == 0); CHECK(secp256k1_pedersen_verify_tally(none, NULL, 0, NULL, 0) != 0); CHECK(*ecount == 8); CHECK(secp256k1_pedersen_verify_tally(none, NULL, 1, &commit_ptr, 1) == 0); CHECK(*ecount == 9); CHECK(secp256k1_pedersen_verify_tally(none, &commit_ptr, 1, NULL, 1) == 0); CHECK(*ecount == 10); CHECK(secp256k1_pedersen_blind_generator_blind_sum(none, &val, &blind_ptr, &blind_out_ptr, 1, 0) != 0); CHECK(*ecount == 10); CHECK(secp256k1_pedersen_blind_generator_blind_sum(none, &val, &blind_ptr, &blind_out_ptr, 1, 1) == 0); CHECK(*ecount == 11); CHECK(secp256k1_pedersen_blind_generator_blind_sum(none, &val, &blind_ptr, &blind_out_ptr, 0, 0) == 0); CHECK(*ecount == 12); CHECK(secp256k1_pedersen_blind_generator_blind_sum(none, NULL, &blind_ptr, &blind_out_ptr, 1, 0) == 0); CHECK(*ecount == 13); CHECK(secp256k1_pedersen_blind_generator_blind_sum(none, &val, NULL, &blind_out_ptr, 1, 0) == 0); CHECK(*ecount == 14); CHECK(secp256k1_pedersen_blind_generator_blind_sum(none, &val, &blind_ptr, NULL, 1, 0) == 0); CHECK(*ecount == 15); } static void test_rangeproof_api(const secp256k1_context *none, const secp256k1_context *sign, const secp256k1_context *vrfy, const secp256k1_context *both, const int32_t *ecount) { unsigned char proof[5134]; unsigned char blind[32]; secp256k1_pedersen_commitment commit; uint64_t vmin = secp256k1_rand32(); uint64_t val = vmin + secp256k1_rand32(); size_t len = sizeof(proof); /* we'll switch to dylan thomas for this one */ const unsigned char message[68] = "My tears are like the quiet drift / Of petals from some magic rose;"; size_t mlen = sizeof(message); const unsigned char ext_commit[72] = "And all my grief flows from the rift / Of unremembered skies and snows."; size_t ext_commit_len = sizeof(ext_commit); secp256k1_rand256(blind); CHECK(secp256k1_pedersen_commit(ctx, &commit, blind, val, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(none, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 1); CHECK(secp256k1_rangeproof_sign(sign, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 2); CHECK(secp256k1_rangeproof_sign(vrfy, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 3); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 3); CHECK(secp256k1_rangeproof_sign(both, NULL, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 4); CHECK(secp256k1_rangeproof_sign(both, proof, NULL, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 5); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, NULL, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 6); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, NULL, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 7); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, NULL, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 8); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, vmin - 1, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 8); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 9); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 9); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, NULL, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 10); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, NULL, 0, secp256k1_generator_h) != 0); CHECK(*ecount == 10); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, NULL, 0, NULL) == 0); CHECK(*ecount == 11); CHECK(secp256k1_rangeproof_sign(both, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); { int exp; int mantissa; uint64_t min_value; uint64_t max_value; CHECK(secp256k1_rangeproof_info(none, &exp, &mantissa, &min_value, &max_value, proof, len) != 0); CHECK(exp == 0); CHECK(((uint64_t) 1 << mantissa) > val - vmin); CHECK(((uint64_t) 1 << (mantissa - 1)) <= val - vmin); CHECK(min_value == vmin); CHECK(max_value >= val); CHECK(secp256k1_rangeproof_info(none, NULL, &mantissa, &min_value, &max_value, proof, len) == 0); CHECK(*ecount == 12); CHECK(secp256k1_rangeproof_info(none, &exp, NULL, &min_value, &max_value, proof, len) == 0); CHECK(*ecount == 13); CHECK(secp256k1_rangeproof_info(none, &exp, &mantissa, NULL, &max_value, proof, len) == 0); CHECK(*ecount == 14); CHECK(secp256k1_rangeproof_info(none, &exp, &mantissa, &min_value, NULL, proof, len) == 0); CHECK(*ecount == 15); CHECK(secp256k1_rangeproof_info(none, &exp, &mantissa, &min_value, &max_value, NULL, len) == 0); CHECK(*ecount == 16); CHECK(secp256k1_rangeproof_info(none, &exp, &mantissa, &min_value, &max_value, proof, 0) == 0); CHECK(*ecount == 16); } { uint64_t min_value; uint64_t max_value; CHECK(secp256k1_rangeproof_verify(none, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 17); CHECK(secp256k1_rangeproof_verify(sign, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 18); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 18); CHECK(secp256k1_rangeproof_verify(vrfy, NULL, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 19); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, NULL, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 20); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, NULL, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 21); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, &commit, NULL, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 22); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, &commit, proof, 0, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 22); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, &commit, proof, len, NULL, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 23); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, &commit, proof, len, NULL, 0, secp256k1_generator_h) == 0); CHECK(*ecount == 23); CHECK(secp256k1_rangeproof_verify(vrfy, &min_value, &max_value, &commit, proof, len, NULL, 0, NULL) == 0); CHECK(*ecount == 24); } { unsigned char blind_out[32]; unsigned char message_out[68]; uint64_t value_out; uint64_t min_value; uint64_t max_value; size_t message_len = sizeof(message_out); CHECK(secp256k1_rangeproof_rewind(none, blind_out, &value_out, message_out, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 25); CHECK(secp256k1_rangeproof_rewind(sign, blind_out, &value_out, message_out, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 26); CHECK(secp256k1_rangeproof_rewind(vrfy, blind_out, &value_out, message_out, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 27); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, message_out, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 27); CHECK(min_value == vmin); CHECK(max_value >= val); CHECK(value_out == val); CHECK(message_len == sizeof(message_out)); CHECK(memcmp(message, message_out, sizeof(message_out)) == 0); CHECK(secp256k1_rangeproof_rewind(both, NULL, &value_out, message_out, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 27); /* blindout may be NULL */ CHECK(secp256k1_rangeproof_rewind(both, blind_out, NULL, message_out, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 27); /* valueout may be NULL */ CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 28); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK(*ecount == 28); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, NULL, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 29); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, NULL, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 30); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, NULL, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 31); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, NULL, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 32); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, NULL, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 33); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, 0, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 33); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, NULL, ext_commit_len, secp256k1_generator_h) == 0); CHECK(*ecount == 34); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, NULL, 0, secp256k1_generator_h) == 0); CHECK(*ecount == 34); CHECK(secp256k1_rangeproof_rewind(both, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, NULL, 0, NULL) == 0); CHECK(*ecount == 35); } } static void test_api(void) { secp256k1_context *none = secp256k1_context_create(SECP256K1_CONTEXT_NONE); secp256k1_context *sign = secp256k1_context_create(SECP256K1_CONTEXT_SIGN); secp256k1_context *vrfy = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY); secp256k1_context *both = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY); int32_t ecount; int i; secp256k1_context_set_error_callback(none, counting_illegal_callback_fn, &ecount); secp256k1_context_set_error_callback(sign, counting_illegal_callback_fn, &ecount); secp256k1_context_set_error_callback(vrfy, counting_illegal_callback_fn, &ecount); secp256k1_context_set_error_callback(both, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(none, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(sign, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(vrfy, counting_illegal_callback_fn, &ecount); secp256k1_context_set_illegal_callback(both, counting_illegal_callback_fn, &ecount); for (i = 0; i < count; i++) { ecount = 0; test_pedersen_api(none, sign, vrfy, &ecount); ecount = 0; test_rangeproof_api(none, sign, vrfy, both, &ecount); } secp256k1_context_destroy(none); secp256k1_context_destroy(sign); secp256k1_context_destroy(vrfy); secp256k1_context_destroy(both); } static void test_pedersen(void) { secp256k1_pedersen_commitment commits[19]; const secp256k1_pedersen_commitment *cptr[19]; unsigned char blinds[32*19]; const unsigned char *bptr[19]; secp256k1_scalar s; uint64_t values[19]; int64_t totalv; int i; int inputs; int outputs; int total; inputs = (secp256k1_rand32() & 7) + 1; outputs = (secp256k1_rand32() & 7) + 2; total = inputs + outputs; for (i = 0; i < 19; i++) { cptr[i] = &commits[i]; bptr[i] = &blinds[i * 32]; } totalv = 0; for (i = 0; i < inputs; i++) { values[i] = secp256k1_rands64(0, INT64_MAX - totalv); totalv += values[i]; } for (i = 0; i < outputs - 1; i++) { values[i + inputs] = secp256k1_rands64(0, totalv); totalv -= values[i + inputs]; } values[total - 1] = totalv; for (i = 0; i < total - 1; i++) { random_scalar_order(&s); secp256k1_scalar_get_b32(&blinds[i * 32], &s); } CHECK(secp256k1_pedersen_blind_sum(ctx, &blinds[(total - 1) * 32], bptr, total - 1, inputs)); for (i = 0; i < total; i++) { CHECK(secp256k1_pedersen_commit(ctx, &commits[i], &blinds[i * 32], values[i], secp256k1_generator_h)); } CHECK(secp256k1_pedersen_verify_tally(ctx, cptr, inputs, &cptr[inputs], outputs)); CHECK(secp256k1_pedersen_verify_tally(ctx, &cptr[inputs], outputs, cptr, inputs)); if (inputs > 0 && values[0] > 0) { CHECK(!secp256k1_pedersen_verify_tally(ctx, cptr, inputs - 1, &cptr[inputs], outputs)); } random_scalar_order(&s); for (i = 0; i < 4; i++) { secp256k1_scalar_get_b32(&blinds[i * 32], &s); } values[0] = INT64_MAX; values[1] = 0; values[2] = 1; for (i = 0; i < 3; i++) { CHECK(secp256k1_pedersen_commit(ctx, &commits[i], &blinds[i * 32], values[i], secp256k1_generator_h)); } CHECK(secp256k1_pedersen_verify_tally(ctx, &cptr[0], 1, &cptr[0], 1)); CHECK(secp256k1_pedersen_verify_tally(ctx, &cptr[1], 1, &cptr[1], 1)); } static void test_borromean(void) { unsigned char e0[32]; secp256k1_scalar s[64]; secp256k1_gej pubs[64]; secp256k1_scalar k[8]; secp256k1_scalar sec[8]; secp256k1_ge ge; secp256k1_scalar one; unsigned char m[32]; size_t rsizes[8]; size_t secidx[8]; size_t nrings; size_t i; size_t j; int c; secp256k1_rand256_test(m); nrings = 1 + (secp256k1_rand32()&7); c = 0; secp256k1_scalar_set_int(&one, 1); if (secp256k1_rand32()&1) { secp256k1_scalar_negate(&one, &one); } for (i = 0; i < nrings; i++) { rsizes[i] = 1 + (secp256k1_rand32()&7); secidx[i] = secp256k1_rand32() % rsizes[i]; random_scalar_order(&sec[i]); random_scalar_order(&k[i]); if(secp256k1_rand32()&7) { sec[i] = one; } if(secp256k1_rand32()&7) { k[i] = one; } for (j = 0; j < rsizes[i]; j++) { random_scalar_order(&s[c + j]); if(secp256k1_rand32()&7) { s[i] = one; } if (j == secidx[i]) { secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &pubs[c + j], &sec[i]); } else { random_group_element_test(&ge); random_group_element_jacobian_test(&pubs[c + j],&ge); } } c += rsizes[i]; } CHECK(secp256k1_borromean_sign(&ctx->ecmult_ctx, &ctx->ecmult_gen_ctx, e0, s, pubs, k, sec, rsizes, secidx, nrings, m, 32)); CHECK(secp256k1_borromean_verify(&ctx->ecmult_ctx, NULL, e0, s, pubs, rsizes, nrings, m, 32)); i = secp256k1_rand32() % c; secp256k1_scalar_negate(&s[i],&s[i]); CHECK(!secp256k1_borromean_verify(&ctx->ecmult_ctx, NULL, e0, s, pubs, rsizes, nrings, m, 32)); secp256k1_scalar_negate(&s[i],&s[i]); secp256k1_scalar_set_int(&one, 1); for(j = 0; j < 4; j++) { i = secp256k1_rand32() % c; if (secp256k1_rand32() & 1) { secp256k1_gej_double_var(&pubs[i],&pubs[i], NULL); } else { secp256k1_scalar_add(&s[i],&s[i],&one); } CHECK(!secp256k1_borromean_verify(&ctx->ecmult_ctx, NULL, e0, s, pubs, rsizes, nrings, m, 32)); } } static void test_rangeproof(void) { const uint64_t testvs[11] = {0, 1, 5, 11, 65535, 65537, INT32_MAX, UINT32_MAX, INT64_MAX - 1, INT64_MAX, UINT64_MAX}; secp256k1_pedersen_commitment commit; secp256k1_pedersen_commitment commit2; unsigned char proof[5134 + 1]; /* One additional byte to test if trailing bytes are rejected */ unsigned char blind[32]; unsigned char blindout[32]; unsigned char message[4096]; size_t mlen; uint64_t v; uint64_t vout; uint64_t vmin; uint64_t minv; uint64_t maxv; size_t len; size_t i; size_t j; size_t k; /* Short message is a Simone de Beauvoir quote */ const unsigned char message_short[120] = "When I see my own likeness in the depths of someone else's consciousness, I always experience a moment of panic."; /* Long message is 0xA5 with a bunch of this quote in the middle */ unsigned char message_long[3968]; memset(message_long, 0xa5, sizeof(message_long)); for (i = 1200; i < 3600; i += 120) { memcpy(&message_long[i], message_short, sizeof(message_short)); } secp256k1_rand256(blind); for (i = 0; i < 11; i++) { v = testvs[i]; CHECK(secp256k1_pedersen_commit(ctx, &commit, blind, v, secp256k1_generator_h)); for (vmin = 0; vmin < (i<9 && i > 0 ? 2 : 1); vmin++) { const unsigned char *input_message = NULL; size_t input_message_len = 0; /* vmin is always either 0 or 1; if it is 1, then we have no room for a message. * If it's 0, we use "minimum encoding" and only have room for a small message when * `testvs[i]` is >= 4; for a large message when it's >= 2^32. */ if (vmin == 0 && i > 2) { input_message = message_short; input_message_len = sizeof(message_short); } if (vmin == 0 && i > 7) { input_message = message_long; input_message_len = sizeof(message_long); } len = 5134; CHECK(secp256k1_rangeproof_sign(ctx, proof, &len, vmin, &commit, blind, commit.data, 0, 0, v, input_message, input_message_len, NULL, 0, secp256k1_generator_h)); CHECK(len <= 5134); mlen = 4096; CHECK(secp256k1_rangeproof_rewind(ctx, blindout, &vout, message, &mlen, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); if (input_message != NULL) { CHECK(memcmp(message, input_message, input_message_len) == 0); } for (j = input_message_len; j < mlen; j++) { CHECK(message[j] == 0); } CHECK(mlen <= 4096); CHECK(memcmp(blindout, blind, 32) == 0); CHECK(vout == v); CHECK(minv <= v); CHECK(maxv >= v); len = 5134; CHECK(secp256k1_rangeproof_sign(ctx, proof, &len, v, &commit, blind, commit.data, -1, 64, v, NULL, 0, NULL, 0, secp256k1_generator_h)); CHECK(len <= 73); CHECK(secp256k1_rangeproof_rewind(ctx, blindout, &vout, NULL, NULL, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(memcmp(blindout, blind, 32) == 0); CHECK(vout == v); CHECK(minv == v); CHECK(maxv == v); /* Check with a committed message */ len = 5134; CHECK(secp256k1_rangeproof_sign(ctx, proof, &len, v, &commit, blind, commit.data, -1, 64, v, NULL, 0, message_short, sizeof(message_short), secp256k1_generator_h)); CHECK(len <= 73); CHECK(!secp256k1_rangeproof_rewind(ctx, blindout, &vout, NULL, NULL, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(!secp256k1_rangeproof_rewind(ctx, blindout, &vout, NULL, NULL, commit.data, &minv, &maxv, &commit, proof, len, message_long, sizeof(message_long), secp256k1_generator_h)); CHECK(secp256k1_rangeproof_rewind(ctx, blindout, &vout, NULL, NULL, commit.data, &minv, &maxv, &commit, proof, len, message_short, sizeof(message_short), secp256k1_generator_h)); CHECK(memcmp(blindout, blind, 32) == 0); CHECK(vout == v); CHECK(minv == v); CHECK(maxv == v); } } secp256k1_rand256(blind); v = INT64_MAX - 1; CHECK(secp256k1_pedersen_commit(ctx, &commit, blind, v, secp256k1_generator_h)); for (i = 0; i < 19; i++) { len = 5134; CHECK(secp256k1_rangeproof_sign(ctx, proof, &len, 0, &commit, blind, commit.data, i, 0, v, NULL, 0, NULL, 0, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(len <= 5134); CHECK(minv <= v); CHECK(maxv >= v); /* Make sure it fails when validating with a committed message */ CHECK(!secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit, proof, len, message_short, sizeof(message_short), secp256k1_generator_h)); } secp256k1_rand256(blind); { /*Malleability test.*/ v = secp256k1_rands64(0, 255); CHECK(secp256k1_pedersen_commit(ctx, &commit, blind, v, secp256k1_generator_h)); len = 5134; CHECK(secp256k1_rangeproof_sign(ctx, proof, &len, 0, &commit, blind, commit.data, 0, 3, v, NULL, 0, NULL, 0, secp256k1_generator_h)); CHECK(len <= 5134); /* Test if trailing bytes are rejected. */ proof[len] = v; CHECK(!secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit, proof, len + 1, NULL, 0, secp256k1_generator_h)); for (i = 0; i < len*8; i++) { proof[i >> 3] ^= 1 << (i & 7); CHECK(!secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); proof[i >> 3] ^= 1 << (i & 7); } CHECK(secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(minv <= v); CHECK(maxv >= v); } memcpy(&commit2, &commit, sizeof(commit)); for (i = 0; i < 10 * (size_t) count; i++) { int exp; int min_bits; v = secp256k1_rands64(0, UINT64_MAX >> (secp256k1_rand32()&63)); vmin = 0; if ((v < INT64_MAX) && (secp256k1_rand32()&1)) { vmin = secp256k1_rands64(0, v); } secp256k1_rand256(blind); CHECK(secp256k1_pedersen_commit(ctx, &commit, blind, v, secp256k1_generator_h)); len = 5134; exp = (int)secp256k1_rands64(0,18)-(int)secp256k1_rands64(0,18); if (exp < 0) { exp = -exp; } min_bits = (int)secp256k1_rands64(0,64)-(int)secp256k1_rands64(0,64); if (min_bits < 0) { min_bits = -min_bits; } CHECK(secp256k1_rangeproof_sign(ctx, proof, &len, vmin, &commit, blind, commit.data, exp, min_bits, v, NULL, 0, NULL, 0, secp256k1_generator_h)); CHECK(len <= 5134); mlen = 4096; CHECK(secp256k1_rangeproof_rewind(ctx, blindout, &vout, message, &mlen, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); for (j = 0; j < mlen; j++) { CHECK(message[j] == 0); } CHECK(mlen <= 4096); CHECK(memcmp(blindout, blind, 32) == 0); CHECK(vout == v); CHECK(minv <= v); CHECK(maxv >= v); CHECK(secp256k1_rangeproof_rewind(ctx, blindout, &vout, NULL, NULL, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); memcpy(&commit2, &commit, sizeof(commit)); } for (j = 0; j < 10; j++) { for (i = 0; i < 96; i++) { secp256k1_rand256(&proof[i * 32]); } for (k = 0; k < 128; k++) { len = k; CHECK(!secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit2, proof, len, NULL, 0, secp256k1_generator_h)); } len = secp256k1_rands64(0, 3072); CHECK(!secp256k1_rangeproof_verify(ctx, &minv, &maxv, &commit2, proof, len, NULL, 0, secp256k1_generator_h)); } } #define MAX_N_GENS 30 void test_multiple_generators(void) { const size_t n_inputs = (secp256k1_rand32() % (MAX_N_GENS / 2)) + 1; const size_t n_outputs = (secp256k1_rand32() % (MAX_N_GENS / 2)) + 1; const size_t n_generators = n_inputs + n_outputs; unsigned char *generator_blind[MAX_N_GENS]; unsigned char *pedersen_blind[MAX_N_GENS]; secp256k1_generator generator[MAX_N_GENS]; secp256k1_pedersen_commitment commit[MAX_N_GENS]; const secp256k1_pedersen_commitment *commit_ptr[MAX_N_GENS]; size_t i; int64_t total_value; uint64_t value[MAX_N_GENS]; secp256k1_scalar s; unsigned char generator_seed[32]; random_scalar_order(&s); secp256k1_scalar_get_b32(generator_seed, &s); /* Create all the needed generators */ for (i = 0; i < n_generators; i++) { generator_blind[i] = (unsigned char*) malloc(32); pedersen_blind[i] = (unsigned char*) malloc(32); random_scalar_order(&s); secp256k1_scalar_get_b32(generator_blind[i], &s); random_scalar_order(&s); secp256k1_scalar_get_b32(pedersen_blind[i], &s); CHECK(secp256k1_generator_generate_blinded(ctx, &generator[i], generator_seed, generator_blind[i])); commit_ptr[i] = &commit[i]; } /* Compute all the values -- can be positive or negative */ total_value = 0; for (i = 0; i < n_outputs; i++) { value[n_inputs + i] = secp256k1_rands64(0, INT64_MAX - total_value); total_value += value[n_inputs + i]; } for (i = 0; i < n_inputs - 1; i++) { value[i] = secp256k1_rands64(0, total_value); total_value -= value[i]; } value[i] = total_value; /* Correct for blinding factors and do the commitments */ CHECK(secp256k1_pedersen_blind_generator_blind_sum(ctx, value, (const unsigned char * const *) generator_blind, pedersen_blind, n_generators, n_inputs)); for (i = 0; i < n_generators; i++) { CHECK(secp256k1_pedersen_commit(ctx, &commit[i], pedersen_blind[i], value[i], &generator[i])); } /* Verify */ CHECK(secp256k1_pedersen_verify_tally(ctx, &commit_ptr[0], n_inputs, &commit_ptr[n_inputs], n_outputs)); /* Cleanup */ for (i = 0; i < n_generators; i++) { free(generator_blind[i]); free(pedersen_blind[i]); } } void test_rangeproof_fixed_vectors(void) { const unsigned char vector_1[] = { 0x62, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x56, 0x02, 0x2a, 0x5c, 0x42, 0x0e, 0x1d, 0x51, 0xe1, 0xb7, 0xf3, 0x69, 0x04, 0xb5, 0xbb, 0x9b, 0x41, 0x66, 0x14, 0xf3, 0x64, 0x42, 0x26, 0xe3, 0xa7, 0x6a, 0x06, 0xbb, 0xa8, 0x5a, 0x49, 0x6f, 0x19, 0x76, 0xfb, 0xe5, 0x75, 0x77, 0x88, 0xab, 0xa9, 0x66, 0x44, 0x80, 0xea, 0x29, 0x95, 0x7f, 0xdf, 0x72, 0x4a, 0xaf, 0x02, 0xbe, 0xdd, 0x5d, 0x15, 0xd8, 0xae, 0xff, 0x74, 0xc9, 0x8c, 0x1a, 0x67, 0x0e, 0xb2, 0x57, 0x22, 0x99, 0xc3, 0x21, 0x46, 0x6f, 0x15, 0x58, 0x0e, 0xdb, 0xe6, 0x6e, 0xc4, 0x0d, 0xfe, 0x6f, 0x04, 0x6b, 0x0d, 0x18, 0x3d, 0x78, 0x40, 0x98, 0x56, 0x4e, 0xe4, 0x4a, 0x74, 0x90, 0xa7, 0xac, 0x9c, 0x16, 0xe0, 0x3e, 0x81, 0xaf, 0x0f, 0xe3, 0x4f, 0x34, 0x99, 0x52, 0xf7, 0xa7, 0xf6, 0xd3, 0x83, 0xa0, 0x17, 0x4b, 0x2d, 0xa7, 0xd4, 0xfd, 0xf7, 0x84, 0x45, 0xc4, 0x11, 0x71, 0x3d, 0x4a, 0x22, 0x34, 0x09, 0x9c, 0xa7, 0xe5, 0xc8, 0xba, 0x04, 0xbf, 0xfd, 0x25, 0x11, 0x7d, 0xa4, 0x43, 0x45, 0xc7, 0x62, 0x9e, 0x7b, 0x80, 0xf6, 0x09, 0xbb, 0x1b, 0x2e, 0xf3, 0xcd, 0x23, 0xe0, 0xed, 0x81, 0x43, 0x42, 0xbe, 0xc4, 0x9f, 0x58, 0x8a, 0x0d, 0x66, 0x79, 0x09, 0x70, 0x11, 0x68, 0x3d, 0x87, 0x38, 0x1c, 0x3c, 0x85, 0x52, 0x5b, 0x62, 0xf7, 0x3e, 0x7e, 0x87, 0xa2, 0x99, 0x24, 0xd0, 0x7d, 0x18, 0x63, 0x56, 0x48, 0xa4, 0x3a, 0xfe, 0x65, 0xfa, 0xa4, 0xd0, 0x67, 0xaa, 0x98, 0x65, 0x4d, 0xe4, 0x22, 0x75, 0x45, 0x52, 0xe8, 0x41, 0xc7, 0xed, 0x38, 0xeb, 0xf5, 0x02, 0x90, 0xc9, 0x45, 0xa3, 0xb0, 0x4d, 0x03, 0xd7, 0xab, 0x43, 0xe4, 0x21, 0xfc, 0x83, 0xd6, 0x12, 0x1d, 0x76, 0xb1, 0x3c, 0x67, 0x63, 0x1f, 0x52, 0x9d, 0xc3, 0x23, 0x5c, 0x4e, 0xa6, 0x8d, 0x01, 0x4a, 0xba, 0x9a, 0xf4, 0x16, 0x5b, 0x67, 0xc8, 0xe1, 0xd2, 0x42, 0x6d, 0xdf, 0xcd, 0x08, 0x6a, 0x73, 0x41, 0x6a, 0xc2, 0x84, 0xc6, 0x31, 0xbe, 0x57, 0xcb, 0x0e, 0xde, 0xbf, 0x71, 0xd5, 0x8a, 0xf7, 0x24, 0xb2, 0xa7, 0x89, 0x96, 0x62, 0x4f, 0xd9, 0xf7, 0xc3, 0xde, 0x4c, 0xab, 0x13, 0x72, 0xb4, 0xb3, 0x35, 0x04, 0x82, 0xa8, 0x75, 0x1d, 0xde, 0x46, 0xa8, 0x0d, 0xb8, 0x23, 0x44, 0x00, 0x44, 0xfa, 0x53, 0x6c, 0x2d, 0xce, 0xd3, 0xa6, 0x80, 0xa1, 0x20, 0xca, 0xd1, 0x63, 0xbb, 0xbe, 0x39, 0x5f, 0x9d, 0x27, 0x69, 0xb3, 0x33, 0x1f, 0xdb, 0xda, 0x67, 0x05, 0x37, 0xbe, 0x65, 0xe9, 0x7e, 0xa9, 0xc3, 0xff, 0x37, 0x8a, 0xb4, 0x2d, 0xfe, 0xf2, 0x16, 0x85, 0xc7, 0x0f, 0xd9, 0xbe, 0x14, 0xd1, 0x80, 0x14, 0x9f, 0x58, 0x56, 0x98, 0x41, 0xf6, 0x26, 0xf7, 0xa2, 0x71, 0x66, 0xb4, 0x7a, 0x9c, 0x12, 0x73, 0xd3, 0xdf, 0x77, 0x2b, 0x49, 0xe5, 0xca, 0x50, 0x57, 0x44, 0x6e, 0x3f, 0x58, 0x56, 0xbc, 0x21, 0x70, 0x4f, 0xc6, 0xaa, 0x12, 0xff, 0x7c, 0xa7, 0x3d, 0xed, 0x46, 0xc1, 0x40, 0xe6, 0x58, 0x09, 0x2a, 0xda, 0xb3, 0x76, 0xab, 0x44, 0xb5, 0x4e, 0xb3, 0x12, 0xe0, 0x26, 0x8a, 0x52, 0xac, 0x49, 0x1d, 0xe7, 0x06, 0x53, 0x3a, 0x01, 0x35, 0x21, 0x2e, 0x86, 0x48, 0xc5, 0x75, 0xc1, 0xa2, 0x7d, 0x22, 0x53, 0xf6, 0x3f, 0x41, 0xc5, 0xb3, 0x08, 0x7d, 0xa3, 0x67, 0xc0, 0xbb, 0xb6, 0x8d, 0xf0, 0xd3, 0x01, 0x72, 0xd3, 0x63, 0x82, 0x01, 0x1a, 0xe7, 0x1d, 0x22, 0xfa, 0x95, 0x33, 0xf6, 0xf2, 0xde, 0xa2, 0x53, 0x86, 0x55, 0x5a, 0xb4, 0x2e, 0x75, 0x75, 0xc6, 0xd5, 0x93, 0x9c, 0x57, 0xa9, 0x1f, 0xb9, 0x3e, 0xe8, 0x1c, 0xbf, 0xac, 0x1c, 0x54, 0x6f, 0xf5, 0xab, 0x41, 0xee, 0xb3, 0x0e, 0xd0, 0x76, 0xc4, 0x1a, 0x45, 0xcd, 0xf1, 0xd6, 0xcc, 0xb0, 0x83, 0x70, 0x73, 0xbc, 0x88, 0x74, 0xa0, 0x5b, 0xe7, 0x98, 0x10, 0x36, 0xbf, 0xec, 0x23, 0x1c, 0xc2, 0xb5, 0xba, 0x4b, 0x9d, 0x7f, 0x8c, 0x8a, 0xe2, 0xda, 0x18, 0xdd, 0xab, 0x27, 0x8a, 0x15, 0xeb, 0xb0, 0xd4, 0x3a, 0x8b, 0x77, 0x00, 0xc7, 0xbb, 0xcc, 0xfa, 0xba, 0xa4, 0x6a, 0x17, 0x5c, 0xf8, 0x51, 0x5d, 0x8d, 0x16, 0xcd, 0xa7, 0x0e, 0x71, 0x97, 0x98, 0x78, 0x5a, 0x41, 0xb3, 0xf0, 0x1f, 0x87, 0x2d, 0x65, 0xcd, 0x29, 0x49, 0xd2, 0x87, 0x2c, 0x91, 0xa9, 0x5f, 0xcc, 0xa9, 0xd8, 0xbb, 0x53, 0x18, 0xe7, 0xd6, 0xec, 0x65, 0xa6, 0x45, 0xf6, 0xce, 0xcf, 0x48, 0xf6, 0x1e, 0x3d, 0xd2, 0xcf, 0xcb, 0x3a, 0xcd, 0xbb, 0x92, 0x29, 0x24, 0x16, 0x7f, 0x8a, 0xa8, 0x5c, 0x0c, 0x45, 0x71, 0x33 }; const unsigned char commit_1[] = { 0x08, 0xf5, 0x1e, 0x0d, 0xc5, 0x86, 0x78, 0x51, 0xa9, 0x00, 0x00, 0xef, 0x4d, 0xe2, 0x94, 0x60, 0x89, 0x83, 0x04, 0xb4, 0x0e, 0x90, 0x10, 0x05, 0x1c, 0x7f, 0xd7, 0x33, 0x92, 0x1f, 0xe7, 0x74, 0x59 }; size_t min_value_1; size_t max_value_1; secp256k1_pedersen_commitment pc; CHECK(secp256k1_pedersen_commitment_parse(ctx, &pc, commit_1)); CHECK(secp256k1_rangeproof_verify( ctx, &min_value_1, &max_value_1, &pc, vector_1, sizeof(vector_1), NULL, 0, secp256k1_generator_h )); } void run_rangeproof_tests(void) { int i; test_api(); test_rangeproof_fixed_vectors(); for (i = 0; i < 10*count; i++) { test_pedersen(); } for (i = 0; i < 10*count; i++) { test_borromean(); } test_rangeproof(); test_multiple_generators(); } #endif