/********************************************************************** * 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_H #define SECP256K1_MODULE_RANGEPROOF_TESTS_H #include #include "../../group.h" #include "../../scalar.h" #include "../../testrand.h" #include "../../util.h" #include "../../../include/secp256k1_rangeproof.h" static void test_rangeproof_api(void) { unsigned char proof[5134]; unsigned char blind[32]; secp256k1_pedersen_commitment commit; uint64_t vmin = secp256k1_testrand32(); uint64_t val = vmin + secp256k1_testrand32(); 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_testrand256(blind); CHECK(secp256k1_pedersen_commit(CTX, &commit, blind, val, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 1); CHECK_ILLEGAL(STATIC_CTX, secp256k1_rangeproof_sign(STATIC_CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, NULL, &len, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, NULL, vmin, &commit, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, &len, vmin, NULL, blind, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, NULL, commit.data, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, NULL, 0, 0, val, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, vmin - 1, message, mlen, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, mlen, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, ext_commit, ext_commit_len, secp256k1_generator_h) != 0); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, NULL, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, NULL, 0, secp256k1_generator_h) != 0); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_sign(CTX, proof, &len, vmin, &commit, blind, commit.data, 0, 0, val, NULL, 0, NULL, 0, NULL)); CHECK(secp256k1_rangeproof_sign(CTX, 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(CTX, &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_ILLEGAL(CTX, secp256k1_rangeproof_info(CTX, NULL, &mantissa, &min_value, &max_value, proof, len)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_info(CTX, &exp, NULL, &min_value, &max_value, proof, len)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_info(CTX, &exp, &mantissa, NULL, &max_value, proof, len)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_info(CTX, &exp, &mantissa, &min_value, NULL, proof, len)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_info(CTX, &exp, &mantissa, &min_value, &max_value, NULL, len)); CHECK(secp256k1_rangeproof_info(CTX, &exp, &mantissa, &min_value, &max_value, proof, 0) == 0); } { uint64_t min_value; uint64_t max_value; CHECK(secp256k1_rangeproof_verify(CTX, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h) == 1); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_verify(CTX, NULL, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_verify(CTX, &min_value, NULL, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_verify(CTX, &min_value, &max_value, NULL, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_verify(CTX, &min_value, &max_value, &commit, NULL, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_verify(CTX, &min_value, &max_value, &commit, proof, 0, ext_commit, ext_commit_len, secp256k1_generator_h) == 0); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_verify(CTX, &min_value, &max_value, &commit, proof, len, NULL, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_verify(CTX, &min_value, &max_value, &commit, proof, len, NULL, 0, secp256k1_generator_h) == 0); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_verify(CTX, &min_value, &max_value, &commit, proof, len, NULL, 0, NULL)); } { 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(CTX, 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) == 1); CHECK_ILLEGAL(STATIC_CTX, secp256k1_rangeproof_rewind(STATIC_CTX, 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)); CHECK(min_value == vmin); CHECK(max_value >= val); CHECK(value_out == val); CHECK(message_len == sizeof(message_out)); CHECK(secp256k1_memcmp_var(message, message_out, sizeof(message_out)) == 0); /* blindout may be NULL */ CHECK(secp256k1_rangeproof_rewind(CTX, 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); /* valueout may be NULL */ CHECK(secp256k1_rangeproof_rewind(CTX, 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_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, &message_len, commit.data, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_rewind(CTX, 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_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, NULL, &min_value, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, NULL, &max_value, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, &min_value, NULL, &commit, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, NULL, proof, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, NULL, len, ext_commit, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_rewind(CTX, 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_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, NULL, ext_commit_len, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, NULL, 0, secp256k1_generator_h) == 0); CHECK_ILLEGAL(CTX, secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, NULL, 0, commit.data, &min_value, &max_value, &commit, proof, len, NULL, 0, NULL)); } /* This constant is hardcoded in these tests and elsewhere, so we * consider it to be part of the API and test it here. */ CHECK(secp256k1_rangeproof_max_size(CTX, 0, 64) == 5134); CHECK(secp256k1_rangeproof_max_size(CTX, UINT64_MAX, 0) == 5134); } 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_testrand256_test(m); nrings = 1 + (secp256k1_testrand32()&7); c = 0; secp256k1_scalar_set_int(&one, 1); if (secp256k1_testrand32()&1) { secp256k1_scalar_negate(&one, &one); } for (i = 0; i < nrings; i++) { rsizes[i] = 1 + (secp256k1_testrand32()&7); secidx[i] = secp256k1_testrand32() % rsizes[i]; random_scalar_order(&sec[i]); random_scalar_order(&k[i]); if(secp256k1_testrand32()&7) { sec[i] = one; } if(secp256k1_testrand32()&7) { k[i] = one; } for (j = 0; j < rsizes[i]; j++) { random_scalar_order(&s[c + j]); if(secp256k1_testrand32()&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_gen_ctx, e0, s, pubs, k, sec, rsizes, secidx, nrings, m, 32)); CHECK(secp256k1_borromean_verify(NULL, e0, s, pubs, rsizes, nrings, m, 32)); i = secp256k1_testrand32() % c; secp256k1_scalar_negate(&s[i],&s[i]); CHECK(!secp256k1_borromean_verify(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_testrand32() % c; if (secp256k1_testrand32() & 1) { secp256k1_gej_double_var(&pubs[i],&pubs[i], NULL); } else { secp256k1_scalar_add(&s[i],&s[i],&one); } CHECK(!secp256k1_borromean_verify(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_testrand256(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); CHECK(len <= secp256k1_rangeproof_max_size(CTX, v, 0)); 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(secp256k1_memcmp_var(message, input_message, input_message_len) == 0); } for (j = input_message_len; j < mlen; j++) { CHECK(message[j] == 0); } CHECK(mlen <= 4096); CHECK(secp256k1_memcmp_var(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(len <= secp256k1_rangeproof_max_size(CTX, v, 0)); CHECK(secp256k1_rangeproof_rewind(CTX, blindout, &vout, NULL, NULL, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(secp256k1_memcmp_var(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(len <= secp256k1_rangeproof_max_size(CTX, v, 0)); 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(secp256k1_memcmp_var(blindout, blind, 32) == 0); CHECK(vout == v); CHECK(minv == v); CHECK(maxv == v); } } secp256k1_testrand256(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(len <= secp256k1_rangeproof_max_size(CTX, v, 0)); 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_testrand256(blind); { /*Malleability test.*/ v = secp256k1_testrandi64(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); CHECK(len <= secp256k1_rangeproof_max_size(CTX, v, 3)); /* 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 < (size_t) COUNT; i++) { int exp; int min_bits; v = secp256k1_testrandi64(0, UINT64_MAX >> (secp256k1_testrand32()&63)); vmin = 0; if ((v < INT64_MAX) && (secp256k1_testrand32()&1)) { vmin = secp256k1_testrandi64(0, v); } secp256k1_testrand256(blind); CHECK(secp256k1_pedersen_commit(CTX, &commit, blind, v, secp256k1_generator_h)); len = 5134; exp = (int)secp256k1_testrandi64(0,18)-(int)secp256k1_testrandi64(0,18); if (exp < 0) { exp = -exp; } min_bits = (int)secp256k1_testrandi64(0,64)-(int)secp256k1_testrandi64(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); CHECK(len <= secp256k1_rangeproof_max_size(CTX, v, min_bits)); 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(secp256k1_memcmp_var(blindout, blind, 32) == 0); 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 < 3; j++) { for (i = 0; i < 96; i++) { secp256k1_testrand256(&proof[i * 32]); } for (k = 0; k < 128; k += 3) { len = k; CHECK(!secp256k1_rangeproof_verify(CTX, &minv, &maxv, &commit2, proof, len, NULL, 0, secp256k1_generator_h)); } len = secp256k1_testrandi64(0, 3072); CHECK(!secp256k1_rangeproof_verify(CTX, &minv, &maxv, &commit2, proof, len, NULL, 0, secp256k1_generator_h)); } } static void test_rangeproof_null_blinder(void) { unsigned char proof[5134]; const unsigned char blind[32] = { 0 }; const uint64_t v = 1111; uint64_t minv, maxv; secp256k1_pedersen_commitment commit; size_t len; CHECK(secp256k1_pedersen_commit(CTX, &commit, blind, v, secp256k1_generator_h)); /* Try a 32-bit proof; should work */ len = 5134; CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, 1, &commit, blind, commit.data, 0, 32, v, NULL, 0, NULL, 0, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_verify(CTX, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(minv == 1); CHECK(maxv == 1ULL << 32); /* Try a 3-bit proof; should work */ len = 5134; CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, v - 1, &commit, blind, commit.data, 0, 3, v, NULL, 0, NULL, 0, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_verify(CTX, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h)); CHECK(minv == 1110); CHECK(maxv == 1117); /* But a 2-bits will not because then it does not have any subcommitments (which rerandomize * the blinding factors that get passed into the borromean logic ... passing 0s will fail) */ len = 5134; CHECK(!secp256k1_rangeproof_sign(CTX, proof, &len, v - 1, &commit, blind, commit.data, 0, 2, v, NULL, 0, NULL, 0, secp256k1_generator_h)); /* Rewinding with 3-bits works */ { uint64_t value_out; unsigned char msg[128]; unsigned char msg_out[128]; unsigned char blind_out[32]; size_t msg_len = sizeof(msg); len = 1000; secp256k1_testrand256(msg); secp256k1_testrand256(&msg[32]); secp256k1_testrand256(&msg[64]); secp256k1_testrand256(&msg[96]); CHECK(secp256k1_rangeproof_sign(CTX, proof, &len, v, &commit, blind, commit.data, 0, 3, v, msg, sizeof(msg), NULL, 0, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_rewind(CTX, blind_out, &value_out, msg_out, &msg_len, commit.data, &minv, &maxv, &commit, proof, len, NULL, 0, secp256k1_generator_h) != 0); CHECK(secp256k1_memcmp_var(blind, blind_out, sizeof(blind)) == 0); CHECK(secp256k1_memcmp_var(msg, msg_out, sizeof(msg)) == 0); CHECK(value_out == v); CHECK(minv == v); CHECK(maxv == v + 7); } } static void test_single_value_proof(uint64_t val) { unsigned char proof[5000]; secp256k1_pedersen_commitment commit; unsigned char blind[32]; unsigned char blind_out[32]; unsigned char nonce[32]; const unsigned char message[1] = " "; /* no message will fit into a single-value proof */ unsigned char message_out[sizeof(proof)] = { 0 }; size_t plen = sizeof(proof); uint64_t min_val_out = 0; uint64_t max_val_out = 0; uint64_t val_out = 0; size_t m_len_out = 0; secp256k1_testrand256(blind); secp256k1_testrand256(nonce); CHECK(secp256k1_pedersen_commit(CTX, &commit, blind, val, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign( CTX, proof, &plen, val, /* min_val */ &commit, blind, nonce, -1, /* exp: -1 is magic value to indicate a single-value proof */ 0, /* min_bits */ val, /* val */ message, sizeof(message), /* Will cause this to fail */ NULL, 0, secp256k1_generator_h ) == 0); plen = sizeof(proof); CHECK(secp256k1_rangeproof_sign( CTX, proof, &plen, val, /* min_val */ &commit, blind, nonce, -1, /* exp: -1 is magic value to indicate a single-value proof */ 0, /* min_bits */ val, /* val */ NULL, 0, NULL, 0, secp256k1_generator_h ) == 1); CHECK(plen <= secp256k1_rangeproof_max_size(CTX, val, 0)); /* Different proof sizes are unfortunate but is caused by `min_value` of * zero being special-cased and encoded more efficiently. */ if (val == 0) { CHECK(plen == 65); } else { CHECK(plen == 73); } CHECK(secp256k1_rangeproof_verify( CTX, &min_val_out, &max_val_out, &commit, proof, plen, NULL, 0, secp256k1_generator_h ) == 1); CHECK(min_val_out == val); CHECK(max_val_out == val); memset(message_out, 0, sizeof(message_out)); m_len_out = sizeof(message_out); CHECK(secp256k1_rangeproof_rewind( CTX, blind_out, &val_out, message_out, &m_len_out, nonce, &min_val_out, &max_val_out, &commit, proof, plen, NULL, 0, secp256k1_generator_h )); CHECK(val_out == val); CHECK(min_val_out == val); CHECK(max_val_out == val); CHECK(m_len_out == 0); CHECK(secp256k1_memcmp_var(blind, blind_out, 32) == 0); for (m_len_out = 0; m_len_out < sizeof(message_out); m_len_out++) { CHECK(message_out[m_len_out] == 0); } } #define MAX_N_GENS 30 static void test_multiple_generators(void) { const size_t n_inputs = (secp256k1_testrand32() % (MAX_N_GENS / 2)) + 1; const size_t n_outputs = (secp256k1_testrand32() % (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_testrandi64(0, INT64_MAX - total_value); total_value += value[n_inputs + i]; } for (i = 0; i < n_inputs - 1; i++) { value[i] = secp256k1_testrandi64(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]); } } static void test_rangeproof_fixed_vectors(void) { size_t i; unsigned char blind[32]; uint64_t value; uint64_t min_value; uint64_t max_value; secp256k1_pedersen_commitment pc; unsigned char message[4000] = {0}; size_t m_len = sizeof(message); /* Vector 1: no message */ { static 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 }; static 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 }; static const unsigned char blind_1[] = { 0x98, 0x44, 0xfc, 0x7a, 0x64, 0xa9, 0xca, 0xdf, 0xf3, 0x2f, 0x9f, 0x02, 0xba, 0x46, 0xc7, 0xd9, 0x77, 0x47, 0xa4, 0xd3, 0x53, 0x17, 0xc6, 0x44, 0x30, 0x73, 0x84, 0xeb, 0x1f, 0xbe, 0xa1, 0xfb }; CHECK(secp256k1_pedersen_commitment_parse(CTX, &pc, commit_1)); CHECK(secp256k1_rangeproof_verify( CTX, &min_value, &max_value, &pc, vector_1, sizeof(vector_1), NULL, 0, secp256k1_generator_h )); CHECK(min_value == 86); CHECK(max_value == 25586); CHECK(secp256k1_rangeproof_rewind( CTX, blind, &value, message, &m_len, pc.data, &min_value, &max_value, &pc, vector_1, sizeof(vector_1), NULL, 0, secp256k1_generator_h )); CHECK(secp256k1_memcmp_var(blind, blind_1, 32) == 0); CHECK(value == 86); CHECK(min_value == 86); CHECK(max_value == 25586); CHECK(m_len == 448); /* length of the sidechannel in the proof */ for (i = 0; i < m_len; i++) { /* No message encoded in this vector */ CHECK(message[i] == 0); } } /* Vector 2: embedded message */ { static const unsigned char vector_2[] = { 0x40, 0x03, 0x00, 0x90, 0x1a, 0x61, 0x64, 0xbb, 0x85, 0x1a, 0x78, 0x35, 0x1e, 0xe0, 0xd5, 0x96, 0x71, 0x0f, 0x18, 0x8e, 0xf3, 0x33, 0xf0, 0x75, 0xfe, 0xd6, 0xc6, 0x11, 0x6b, 0x42, 0x89, 0xea, 0xa2, 0x0c, 0x89, 0x25, 0x37, 0x81, 0x10, 0xf9, 0xf0, 0x9b, 0xda, 0x68, 0x2a, 0xd9, 0x2e, 0x0c, 0x45, 0x17, 0x54, 0x6d, 0x02, 0xd2, 0x21, 0x5d, 0xbc, 0x10, 0xf8, 0x8f, 0xf1, 0x92, 0x40, 0xa9, 0xc7, 0x24, 0x00, 0x1b, 0xc8, 0x75, 0x0f, 0xf6, 0x8f, 0x93, 0x8b, 0x78, 0x62, 0x73, 0x3c, 0x86, 0x4b, 0x61, 0x7c, 0x0f, 0xc6, 0x41, 0xc9, 0xb3, 0xc1, 0x30, 0x7f, 0xd4, 0xee, 0x9f, 0x37, 0x08, 0x9b, 0x64, 0x23, 0xd5, 0xe6, 0x1a, 0x03, 0x54, 0x74, 0x9b, 0x0b, 0xae, 0x6f, 0x2b, 0x1e, 0xf5, 0x40, 0x44, 0xaa, 0x12, 0xe8, 0xbd, 0xe0, 0xa6, 0x85, 0x89, 0xf1, 0xa9, 0xd0, 0x3f, 0x2e, 0xc6, 0x1f, 0x11, 0xf5, 0x44, 0x69, 0x99, 0x31, 0x10, 0x2e, 0x64, 0xc6, 0x44, 0xdb, 0x47, 0x06, 0x6d, 0xd5, 0xf2, 0x8d, 0x19, 0x00, 0x39, 0xb8, 0xca, 0xda, 0x5c, 0x1d, 0x83, 0xbd, 0xa3, 0x6d, 0xbf, 0x97, 0xdd, 0x83, 0x86, 0xc9, 0x56, 0xe2, 0xbb, 0x37, 0x4b, 0x2d, 0xb5, 0x9d, 0xf2, 0x7a, 0x6a, 0x25, 0x47, 0xfa, 0x03, 0x05, 0xc5, 0xda, 0x73, 0xe1, 0x96, 0x15, 0x21, 0x23, 0xe5, 0xef, 0x55, 0x36, 0xdd, 0xf1, 0xb1, 0x3f, 0x33, 0x1a, 0x91, 0x6c, 0x73, 0x64, 0xd3, 0x88, 0xe7, 0xc6, 0xc9, 0x04, 0x29, 0xae, 0x55, 0x27, 0xa0, 0x80, 0x60, 0xaf, 0x0c, 0x09, 0x2f, 0xc8, 0x1b, 0xe6, 0x16, 0x9e, 0xed, 0x29, 0xc7, 0x93, 0xce, 0xc7, 0x0d, 0xdf, 0x1f, 0x28, 0xba, 0xf3, 0x38, 0xc3, 0xaa, 0x99, 0xd9, 0x21, 0x41, 0xb8, 0x10, 0xa5, 0x48, 0x37, 0xec, 0x60, 0xda, 0x64, 0x5a, 0x73, 0x55, 0xd7, 0xff, 0x23, 0xfa, 0xf6, 0xc6, 0xf4, 0xe2, 0xca, 0x99, 0x2f, 0x30, 0x36, 0x48, 0x73, 0x8b, 0x57, 0xa6, 0x62, 0x12, 0xa3, 0xe7, 0x5c, 0xa8, 0xd1, 0xe6, 0x85, 0x05, 0x59, 0xfe, 0x2b, 0x44, 0xe4, 0x73, 0x1c, 0xc3, 0x56, 0x32, 0x07, 0x65, 0x4a, 0x58, 0xaf, 0x2b, 0x3f, 0x36, 0xca, 0xb4, 0x1d, 0x5c, 0x2a, 0x46, 0x1f, 0xf7, 0x63, 0x59, 0x4f, 0x2b, 0xd0, 0xf6, 0xfc, 0xcf, 0x04, 0x09, 0xb7, 0x65, 0x1b }; static const unsigned char commit_2[] = { 0x09, 0x25, 0xa4, 0xbd, 0xc4, 0x57, 0x69, 0xeb, 0x4f, 0x34, 0x0f, 0xea, 0xb8, 0xe4, 0x72, 0x04, 0x54, 0x06, 0xe5, 0xd6, 0x85, 0x15, 0x42, 0xea, 0x6e, 0x1d, 0x11, 0x11, 0x9c, 0x56, 0xf8, 0x10, 0x45 }; static const unsigned char blind_2[] = { 0xdc, 0x79, 0x07, 0x89, 0x2d, 0xc4, 0xe3, 0x76, 0xf9, 0x13, 0x38, 0xd6, 0x4b, 0x46, 0xed, 0x9d, 0x9b, 0xf6, 0x70, 0x3d, 0x04, 0xcf, 0x96, 0x8c, 0xfd, 0xb5, 0xff, 0x0a, 0x06, 0xc7, 0x08, 0x8b }; static const unsigned char message_2[] = "When I see my own likeness in the depths of someone else's consciousness, I always experience a moment of panic."; CHECK(secp256k1_pedersen_commitment_parse(CTX, &pc, commit_2)); CHECK(secp256k1_rangeproof_verify( CTX, &min_value, &max_value, &pc, vector_2, sizeof(vector_2), NULL, 0, secp256k1_generator_h )); CHECK(min_value == 0); CHECK(max_value == 15); CHECK(secp256k1_rangeproof_rewind( CTX, blind, &value, message, &m_len, pc.data, &min_value, &max_value, &pc, vector_2, sizeof(vector_2), NULL, 0, secp256k1_generator_h )); CHECK(secp256k1_memcmp_var(blind, blind_2, 32) == 0); CHECK(value == 11); CHECK(min_value == 0); CHECK(max_value == 15); CHECK(m_len == 192); /* length of the sidechannel in the proof */ CHECK(secp256k1_memcmp_var(message, message_2, sizeof(message_2)) == 0); for (i = sizeof(message_2); i < m_len; i++) { CHECK(message[i] == 0); } } /* Vector 3: single-value proof of UINT64_MAX */ { static const unsigned char vector_3[] = { 0x20, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdc, 0x7d, 0x0b, 0x79, 0x0e, 0xaf, 0x41, 0xa5, 0x8e, 0x9b, 0x0c, 0x5b, 0xa3, 0xee, 0x7d, 0xfd, 0x3d, 0x6b, 0xf3, 0xac, 0x04, 0x8a, 0x43, 0x75, 0xb0, 0xb7, 0x0e, 0x92, 0xd7, 0xdf, 0xf0, 0x76, 0xc4, 0xa5, 0xb6, 0x2f, 0xf1, 0xb5, 0xfb, 0xb4, 0xb6, 0x29, 0xea, 0x34, 0x9b, 0x16, 0x30, 0x0d, 0x06, 0xf1, 0xb4, 0x3f, 0x0d, 0x73, 0x59, 0x75, 0xbf, 0x5d, 0x19, 0x59, 0xef, 0x11, 0xf0, 0xbf }; static const unsigned char commit_3[] = { 0x08, 0xc7, 0xea, 0x40, 0x7d, 0x26, 0x38, 0xa2, 0x99, 0xb9, 0x40, 0x22, 0x78, 0x17, 0x57, 0x65, 0xb3, 0x36, 0x82, 0x18, 0x42, 0xc5, 0x57, 0x04, 0x5e, 0x58, 0x5e, 0xf6, 0x40, 0x8b, 0x24, 0x73, 0x10 }; static const unsigned char nonce_3[] = { 0x84, 0x50, 0x94, 0x69, 0xa3, 0x4b, 0x6c, 0x62, 0x1a, 0xc7, 0xe2, 0x0e, 0x07, 0x9a, 0x6f, 0x85, 0x5f, 0x26, 0x50, 0xcd, 0x88, 0x5a, 0x9f, 0xaa, 0x23, 0x5e, 0x0a, 0xe0, 0x7e, 0xc5, 0xe9, 0xf1 }; static const unsigned char blind_3[] = { 0x68, 0x89, 0x47, 0x8c, 0x77, 0xec, 0xcc, 0x2b, 0x65, 0x01, 0x78, 0x6b, 0x06, 0x8b, 0x38, 0x94, 0xc0, 0x6b, 0x9b, 0x4c, 0x02, 0xa6, 0xc8, 0xf6, 0xc0, 0x34, 0xea, 0x35, 0x57, 0xf4, 0xe1, 0x37 }; CHECK(secp256k1_pedersen_commitment_parse(CTX, &pc, commit_3)); CHECK(secp256k1_rangeproof_verify( CTX, &min_value, &max_value, &pc, vector_3, sizeof(vector_3), NULL, 0, secp256k1_generator_h )); CHECK(min_value == UINT64_MAX); CHECK(max_value == UINT64_MAX); CHECK(secp256k1_rangeproof_rewind( CTX, blind, &value, message, &m_len, nonce_3, &min_value, &max_value, &pc, vector_3, sizeof(vector_3), NULL, 0, secp256k1_generator_h )); CHECK(secp256k1_memcmp_var(blind, blind_3, 32) == 0); CHECK(value == UINT64_MAX); CHECK(min_value == UINT64_MAX); CHECK(max_value == UINT64_MAX); CHECK(m_len == 0); } } static void print_vector_helper(unsigned char *buf, size_t buf_len) { size_t j; printf(" "); for (j = 0; j < buf_len; j++) { printf("0x%02x", buf[j]); if (j == buf_len-1) { printf(",\n"); } else if ((j+1) % 16 != 0) { printf(", "); } else { printf(",\n"); printf(" "); } } printf("};\n"); } static void print_vector(int i, unsigned char *proof, size_t p_len, secp256k1_pedersen_commitment *commit) { unsigned char commit_output[33]; printf("unsigned char vector_%d[] = {\n", i); print_vector_helper(proof, p_len); CHECK(secp256k1_pedersen_commitment_serialize(CTX, commit_output, commit)); printf("unsigned char commit_%d[] = {\n", i); print_vector_helper(commit_output, sizeof(commit_output)); } /* Use same nonce and blinding value for all "reproducible" test vectors */ static unsigned char vector_blind[] = { 0x48, 0x26, 0xad, 0x41, 0x37, 0x4c, 0x25, 0x62, 0x52, 0x14, 0x78, 0x82, 0x89, 0x9c, 0x86, 0x27, 0xa1, 0x19, 0xf6, 0xe1, 0xfa, 0x44, 0xe4, 0x29, 0x08, 0xa7, 0xb3, 0x45, 0xad, 0x35, 0xb2, 0xd9, }; static unsigned char vector_nonce[] = { 0xc8, 0x5c, 0x7e, 0x6c, 0xa1, 0xfa, 0x11, 0x35, 0xc7, 0x45, 0x24, 0x8a, 0xb5, 0x28, 0x6d, 0x1a, 0x88, 0x00, 0xff, 0xca, 0x96, 0x0f, 0xc7, 0x77, 0xa5, 0x96, 0x7a, 0x5e, 0xf8, 0x88, 0x2d, 0xd4, }; /* Maximum length of a message that can be embedded into a rangeproof */ static void test_rangeproof_fixed_vectors_reproducible_helper(unsigned char *vector, size_t vector_len, unsigned char *commit, uint64_t *value_r, uint64_t *min_value_r, uint64_t *max_value_r, unsigned char *message_r, size_t *m_len_r) { secp256k1_pedersen_commitment pc; unsigned char blind_r[32]; CHECK(secp256k1_pedersen_commitment_parse(CTX, &pc, commit)); CHECK(secp256k1_rangeproof_verify( CTX, min_value_r, max_value_r, &pc, vector, vector_len, NULL, 0, secp256k1_generator_h )); *m_len_r = SECP256K1_RANGEPROOF_MAX_MESSAGE_LEN; CHECK(secp256k1_rangeproof_rewind( CTX, blind_r, value_r, message_r, m_len_r, vector_nonce, min_value_r, max_value_r, &pc, vector, vector_len, NULL, 0, secp256k1_generator_h )); CHECK(secp256k1_memcmp_var(blind_r, vector_blind, sizeof(vector_blind)) == 0); } static void test_rangeproof_fixed_vectors_reproducible(void) { uint64_t value_r; uint64_t min_value_r; uint64_t max_value_r; unsigned char message[SECP256K1_RANGEPROOF_MAX_MESSAGE_LEN], message_r[SECP256K1_RANGEPROOF_MAX_MESSAGE_LEN]; size_t m_len_r; memset(message, 0xFF, sizeof(message)); /* Test maximum values for value, min_bits, m_len and exp */ { uint64_t value = UINT64_MAX; uint64_t min_value = 0; size_t m_len = sizeof(message); /* maximum message length */ int min_bits = 64; int exp = 18; unsigned char proof[5126]; size_t p_len = sizeof(proof); secp256k1_pedersen_commitment pc; unsigned char vector_0[] = { 0x40, 0x3f, 0xd1, 0x77, 0x65, 0x05, 0x87, 0x88, 0xd0, 0x3d, 0xb2, 0x24, 0x60, 0x7a, 0x08, 0x76, 0xf8, 0x9f, 0x5a, 0x00, 0x73, 0x32, 0x6b, 0x5b, 0x0b, 0x59, 0xda, 0xa0, 0x6d, 0x2b, 0x66, 0xb8, 0xfa, 0xa4, 0x8c, 0xf9, 0x78, 0x5e, 0xe3, 0xc7, 0x30, 0xea, 0xb4, 0x31, 0x77, 0x3a, 0xe4, 0xe3, 0xf0, 0x76, 0x15, 0x21, 0x07, 0xb3, 0x6e, 0x84, 0x36, 0xdb, 0x45, 0xe6, 0x2b, 0x14, 0x50, 0xf3, 0x53, 0x5d, 0x79, 0xf8, 0x6d, 0xc4, 0x99, 0x36, 0xa4, 0x7c, 0xc1, 0x14, 0x90, 0x99, 0xa8, 0x4b, 0xf0, 0x01, 0x9f, 0xe7, 0xd4, 0xf9, 0xf1, 0x74, 0xb0, 0x7f, 0xf5, 0x90, 0x8d, 0x27, 0x9e, 0x61, 0x9e, 0xc5, 0xd0, 0xa6, 0x32, 0xe8, 0x64, 0x4a, 0x02, 0x8b, 0xbf, 0xf7, 0xb8, 0x31, 0xa3, 0x4d, 0x99, 0xbe, 0x12, 0x77, 0x4b, 0x07, 0x4a, 0xef, 0x75, 0xb4, 0xb3, 0x6e, 0x96, 0x95, 0xff, 0xe9, 0xf7, 0xfc, 0x27, 0x17, 0x62, 0xfa, 0x99, 0xed, 0x00, 0x3c, 0xdd, 0xaa, 0xae, 0x9e, 0x80, 0xc1, 0x29, 0x73, 0x4d, 0xfc, 0x41, 0xe6, 0xb4, 0x21, 0xe2, 0x62, 0x78, 0xf5, 0x46, 0xef, 0xcd, 0xcf, 0x15, 0x2a, 0x05, 0x80, 0xb9, 0x95, 0xaa, 0xa5, 0xe9, 0x69, 0x5f, 0xfd, 0x58, 0x12, 0x00, 0x51, 0xc4, 0x8f, 0xa2, 0xce, 0x03, 0x7f, 0x16, 0x19, 0xb1, 0x77, 0xc2, 0x98, 0xbe, 0xaa, 0x18, 0x6a, 0x80, 0x0b, 0x4a, 0x81, 0x85, 0xc0, 0xc2, 0x62, 0xb3, 0xec, 0xae, 0xe7, 0x95, 0xbf, 0xd3, 0xe0, 0xcd, 0xa3, 0xdd, 0x02, 0x70, 0x98, 0x6c, 0xf3, 0x4b, 0x43, 0xec, 0x8d, 0x07, 0xf4, 0x3e, 0xb0, 0x00, 0x7c, 0xb7, 0x1a, 0x85, 0x9a, 0x94, 0xe8, 0x57, 0xc9, 0x7e, 0x24, 0xb4, 0x7a, 0x84, 0x17, 0x08, 0xe6, 0xae, 0x91, 0x14, 0xcb, 0x94, 0xf3, 0xe9, 0x13, 0x25, 0x35, 0x54, 0xbf, 0x22, 0xe9, 0xab, 0x8e, 0xa4, 0xa1, 0x18, 0x78, 0x6c, 0xee, 0x13, 0x26, 0xfc, 0x79, 0xf1, 0xe5, 0x51, 0x1e, 0x0c, 0xac, 0xa5, 0xef, 0x0d, 0xee, 0xe8, 0x5f, 0x93, 0xa4, 0x88, 0x4a, 0x32, 0x95, 0x8a, 0x61, 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0xf9, 0xe8, 0xc4, 0x47, 0x4d, 0xfb, 0xa8, 0x54, 0x99, 0x50, 0x1d, 0xe7, 0xaf, 0x1a, 0x12, 0x20, 0x8d, 0xcd, 0xde, 0x8e, 0xf8, 0x26, 0x65, 0x8b, }; unsigned char commit_0[] = { 0x09, 0x9e, 0x56, 0x8d, 0x5b, 0x9d, 0x2a, 0xd6, 0x1f, 0xe0, 0x81, 0x21, 0xcc, 0x15, 0xb3, 0x66, 0x6d, 0xb4, 0xbb, 0xac, 0xdd, 0x28, 0x08, 0xab, 0x21, 0x6e, 0x35, 0xac, 0xa7, 0xe0, 0x0a, 0xa8, 0xef, }; CHECK(secp256k1_pedersen_commit(CTX, &pc, vector_blind, value, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &p_len, min_value, &pc, vector_blind, vector_nonce, exp, min_bits, value, message, m_len, NULL, 0, secp256k1_generator_h)); CHECK(p_len <= secp256k1_rangeproof_max_size(CTX, value, min_bits)); CHECK(p_len == sizeof(proof)); /* Uncomment the next line to print the test vector */ /* print_vector(0, proof, p_len, &pc); */ CHECK(p_len == sizeof(vector_0)); CHECK(secp256k1_memcmp_var(proof, vector_0, p_len) == 0); test_rangeproof_fixed_vectors_reproducible_helper(vector_0, sizeof(vector_0), commit_0, &value_r, &min_value_r, &max_value_r, message_r, &m_len_r); CHECK(value_r == value); CHECK(m_len_r == m_len); CHECK(secp256k1_memcmp_var(message_r, message, m_len_r) == 0); CHECK(min_value_r == min_value); CHECK(max_value_r == UINT64_MAX); memset(message_r, 0, sizeof(message_r)); } /* Test min_bits = 3 */ { uint64_t value = 13; size_t m_len = 128; /* maximum message length with min_bits = 3 */ uint64_t min_value = 1; int min_bits = 3; int exp = 1; unsigned char proof[267]; size_t p_len = sizeof(proof); secp256k1_pedersen_commitment pc; unsigned char vector_1[] = { 0x61, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x01, 0xcb, 0xdc, 0xbe, 0x42, 0xe6, 0x44, 0x1e, 0xc4, 0x63, 0x9d, 0xb1, 0x93, 0x7b, 0x49, 0xdc, 0xd5, 0x6e, 0x55, 0xdd, 0x3b, 0x1e, 0x41, 0x1c, 0x0e, 0xd7, 0x47, 0xd7, 0xf0, 0x26, 0xf7, 0xe4, 0x36, 0xbd, 0x51, 0xb9, 0x77, 0x90, 0x33, 0xdd, 0x64, 0xe7, 0x47, 0x38, 0x49, 0x29, 0x12, 0xa8, 0x12, 0x79, 0xbc, 0x62, 0xea, 0xf9, 0xb5, 0x51, 0x8f, 0x51, 0xea, 0x28, 0x5d, 0x30, 0x9f, 0x30, 0xd5, 0x93, 0x31, 0x56, 0x61, 0x01, 0xd7, 0x7f, 0xa4, 0xec, 0xfc, 0xe5, 0x83, 0x52, 0x5a, 0xe0, 0x80, 0x76, 0x40, 0xb8, 0x8d, 0x67, 0x23, 0x46, 0x8c, 0xb8, 0x74, 0x2a, 0x20, 0x12, 0x86, 0x4d, 0xd8, 0x8c, 0x23, 0x73, 0x2f, 0xbe, 0x99, 0xa5, 0xd5, 0x8c, 0x11, 0xc7, 0xb2, 0xf9, 0xd3, 0x7c, 0x88, 0x16, 0x4d, 0x21, 0x80, 0x10, 0x70, 0xfc, 0x1f, 0x9b, 0x0b, 0x5e, 0xbe, 0xe3, 0x65, 0xe2, 0x4f, 0xbd, 0x1d, 0xb0, 0x64, 0x0a, 0xc5, 0xe0, 0x94, 0x8b, 0x49, 0xf7, 0xc4, 0x88, 0x5e, 0xc0, 0x2d, 0xbb, 0x98, 0x60, 0x5f, 0xd2, 0x7a, 0x9a, 0xff, 0x9e, 0x1c, 0x1f, 0x45, 0x34, 0x08, 0x96, 0xa9, 0xd3, 0xa5, 0x4d, 0x95, 0x9c, 0x1f, 0xe6, 0xe5, 0xdc, 0x32, 0xbb, 0x18, 0x4a, 0x76, 0x22, 0xe9, 0x75, 0x1f, 0x45, 0x6b, 0x81, 0x70, 0x4a, 0xc8, 0x00, 0x72, 0x7a, 0xc8, 0xee, 0xed, 0xc5, 0x19, 0x8f, 0xec, 0x7b, 0x4b, 0xfd, 0x7f, 0xc8, 0x51, 0xda, 0x28, 0x0e, 0x95, 0xd3, 0xc6, 0xc1, 0x29, 0x28, 0x3f, 0xd8, 0x3d, 0x41, 0xde, 0xdf, 0xfc, 0x2b, 0x71, 0x3a, 0xdb, 0x78, 0xa4, 0x0e, 0x50, 0xb8, 0xf9, 0xae, 0xdb, 0x7b, 0xb1, 0x31, 0x81, 0xc2, 0xf2, 0xb5, 0x01, 0x64, 0x8e, 0x86, 0xe2, 0x8b, 0x67, 0x13, 0xec, 0x7e, 0xf5, 0xad, 0x9d, 0x57, 0x2b, 0x5d, 0x0c, 0x94, 0xa9, 0x89, 0x92, }; unsigned char commit_1[] = { 0x09, 0xe5, 0xb3, 0x27, 0x82, 0x88, 0xeb, 0x21, 0xcd, 0xb2, 0x56, 0x37, 0x61, 0x84, 0xce, 0xc1, 0x66, 0x16, 0x2e, 0x44, 0xc8, 0x65, 0x8e, 0xe6, 0x3a, 0x1a, 0x57, 0x2c, 0xb9, 0x6c, 0x07, 0x85, 0xf0, }; CHECK(secp256k1_pedersen_commit(CTX, &pc, vector_blind, value, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &p_len, min_value, &pc, vector_blind, vector_nonce, exp, min_bits, value, message, m_len, NULL, 0, secp256k1_generator_h)); CHECK(p_len <= secp256k1_rangeproof_max_size(CTX, value, min_bits)); CHECK(p_len == sizeof(proof)); /* Uncomment the next line to print the test vector */ /* print_vector(1, proof, p_len, &pc); */ CHECK(p_len == sizeof(vector_1)); CHECK(secp256k1_memcmp_var(proof, vector_1, p_len) == 0); test_rangeproof_fixed_vectors_reproducible_helper(vector_1, sizeof(vector_1), commit_1, &value_r, &min_value_r, &max_value_r, message_r, &m_len_r); CHECK(value_r == value); CHECK(m_len_r == m_len); CHECK(secp256k1_memcmp_var(message_r, message, m_len_r) == 0); CHECK(min_value_r == 3); CHECK(max_value_r == 73); memset(message_r, 0, sizeof(message_r)); } /* Test large min_value */ { uint64_t value = INT64_MAX; size_t m_len = 0; /* maximum message length with min_bits = 3 */ /* Uncomment this to recreate test vector */ uint64_t min_value = INT64_MAX-1; int min_bits = 1; int exp = 0; unsigned char proof[106]; size_t p_len = sizeof(proof); secp256k1_pedersen_commitment pc; unsigned char vector_2[] = { 0x60, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x81, 0xd8, 0x21, 0x12, 0x4d, 0xa4, 0x84, 0xdd, 0x2c, 0xd1, 0x04, 0xe7, 0x08, 0x9a, 0xd3, 0x6f, 0xa5, 0xd8, 0xfc, 0x52, 0x4c, 0xba, 0xf0, 0x83, 0xeb, 0x76, 0x9f, 0x1c, 0x03, 0xe3, 0xcf, 0x23, 0x1e, 0x40, 0x18, 0xc6, 0x6d, 0xf9, 0x25, 0x56, 0x80, 0x3c, 0x83, 0xdd, 0x58, 0x36, 0x43, 0xe3, 0x56, 0xa0, 0xb7, 0xf0, 0x0e, 0xf9, 0xe2, 0x8b, 0x82, 0x5a, 0x77, 0xa7, 0xbe, 0x36, 0x98, 0x10, 0x99, 0x2e, 0xaa, 0x21, 0x24, 0xe6, 0x78, 0xa8, 0xcc, 0xc7, 0x06, 0x1c, 0x06, 0xb0, 0x03, 0x87, 0x86, 0x89, 0xce, 0x85, 0x88, 0xea, 0xa1, 0x9d, 0x4d, 0xfd, 0x8d, 0x65, 0xbd, 0xa9, 0xd0, 0x0f, }; unsigned char commit_2[] = { 0x09, 0x2a, 0x74, 0xa1, 0x9c, 0xee, 0xcb, 0x6a, 0xd1, 0xa7, 0x97, 0xbe, 0x97, 0xe7, 0xb6, 0x37, 0x90, 0x96, 0xc2, 0x5a, 0xe5, 0xfc, 0xed, 0x91, 0xff, 0x4c, 0x67, 0x07, 0x96, 0x1d, 0x2a, 0xb3, 0x70, }; CHECK(secp256k1_pedersen_commit(CTX, &pc, vector_blind, value, secp256k1_generator_h)); CHECK(secp256k1_rangeproof_sign(CTX, proof, &p_len, min_value, &pc, vector_blind, vector_nonce, exp, min_bits, value, message, m_len, NULL, 0, secp256k1_generator_h)); CHECK(p_len <= secp256k1_rangeproof_max_size(CTX, value, min_bits)); CHECK(p_len == sizeof(proof)); /* Uncomment the next line to print the test vector */ /* print_vector(2, proof, p_len, &pc); */ CHECK(p_len == sizeof(vector_2)); CHECK(secp256k1_memcmp_var(proof, vector_2, p_len) == 0); test_rangeproof_fixed_vectors_reproducible_helper(vector_2, sizeof(vector_2), commit_2, &value_r, &min_value_r, &max_value_r, message_r, &m_len_r); CHECK(value_r == value); CHECK(m_len_r == m_len); CHECK(secp256k1_memcmp_var(message_r, message, m_len_r) == 0); CHECK(min_value_r == INT64_MAX-1); CHECK(max_value_r == INT64_MAX); memset(message_r, 0, sizeof(message_r)); } } static void run_rangeproof_tests(void) { int i; for (i = 0; i < COUNT; i++) { test_rangeproof_api(); } test_single_value_proof(0); test_single_value_proof(12345678); test_single_value_proof(UINT64_MAX); test_rangeproof_fixed_vectors(); test_rangeproof_fixed_vectors_reproducible(); for (i = 0; i < COUNT / 2 + 1; i++) { test_borromean(); } test_rangeproof(); test_rangeproof_null_blinder(); test_multiple_generators(); } #endif