Add schnorrsig module which implements BIP-schnorr [0] compatible signing, verification and batch verification.
[0] https://github.com/sipa/bips/blob/bip-schnorr/bip-schnorr.mediawiki
This commit is contained in:
Andrew Poelstra
committed by
Tim Ruffing
Tim Ruffing
parent
a1f16a0a53
commit
c59c602dd6
8
src/modules/schnorrsig/Makefile.am.include
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8
src/modules/schnorrsig/Makefile.am.include
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@@ -0,0 +1,8 @@
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include_HEADERS += include/secp256k1_schnorrsig.h
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noinst_HEADERS += src/modules/schnorrsig/main_impl.h
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noinst_HEADERS += src/modules/schnorrsig/tests_impl.h
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if USE_BENCHMARK
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noinst_PROGRAMS += bench_schnorrsig
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bench_schnorrsig_SOURCES = src/bench_schnorrsig.c
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bench_schnorrsig_LDADD = libsecp256k1.la $(SECP_LIBS) $(COMMON_LIB)
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endif
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338
src/modules/schnorrsig/main_impl.h
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338
src/modules/schnorrsig/main_impl.h
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@@ -0,0 +1,338 @@
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/**********************************************************************
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* Copyright (c) 2018 Andrew Poelstra *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
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**********************************************************************/
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#ifndef _SECP256K1_MODULE_SCHNORRSIG_MAIN_
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#define _SECP256K1_MODULE_SCHNORRSIG_MAIN_
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#include "include/secp256k1.h"
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#include "include/secp256k1_schnorrsig.h"
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#include "hash.h"
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int secp256k1_schnorrsig_serialize(const secp256k1_context* ctx, unsigned char *out64, const secp256k1_schnorrsig* sig) {
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(void) ctx;
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VERIFY_CHECK(ctx != NULL);
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ARG_CHECK(out64 != NULL);
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ARG_CHECK(sig != NULL);
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memcpy(out64, sig->data, 64);
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return 1;
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}
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int secp256k1_schnorrsig_parse(const secp256k1_context* ctx, secp256k1_schnorrsig* sig, const unsigned char *in64) {
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(void) ctx;
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VERIFY_CHECK(ctx != NULL);
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ARG_CHECK(sig != NULL);
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ARG_CHECK(in64 != NULL);
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memcpy(sig->data, in64, 64);
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return 1;
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}
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int secp256k1_schnorrsig_sign(const secp256k1_context* ctx, secp256k1_schnorrsig *sig, int *nonce_is_negated, const unsigned char *msg32, const unsigned char *seckey, secp256k1_nonce_function noncefp, void *ndata) {
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secp256k1_scalar x;
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secp256k1_scalar e;
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secp256k1_scalar k;
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secp256k1_gej pkj;
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secp256k1_gej rj;
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secp256k1_ge pk;
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secp256k1_ge r;
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secp256k1_sha256 sha;
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int overflow;
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unsigned char buf[33];
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size_t buflen = sizeof(buf);
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VERIFY_CHECK(ctx != NULL);
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ARG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
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ARG_CHECK(sig != NULL);
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ARG_CHECK(msg32 != NULL);
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ARG_CHECK(seckey != NULL);
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if (noncefp == NULL) {
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noncefp = secp256k1_nonce_function_bipschnorr;
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}
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secp256k1_scalar_set_b32(&x, seckey, &overflow);
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/* Fail if the secret key is invalid. */
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if (overflow || secp256k1_scalar_is_zero(&x)) {
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memset(sig, 0, sizeof(*sig));
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return 0;
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}
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secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &pkj, &x);
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secp256k1_ge_set_gej(&pk, &pkj);
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if (!noncefp(buf, msg32, seckey, NULL, (void*)ndata, 0)) {
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return 0;
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}
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secp256k1_scalar_set_b32(&k, buf, NULL);
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if (secp256k1_scalar_is_zero(&k)) {
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return 0;
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}
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secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &rj, &k);
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secp256k1_ge_set_gej(&r, &rj);
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if (nonce_is_negated != NULL) {
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*nonce_is_negated = 0;
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}
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if (!secp256k1_fe_is_quad_var(&r.y)) {
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secp256k1_scalar_negate(&k, &k);
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if (nonce_is_negated != NULL) {
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*nonce_is_negated = 1;
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}
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}
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secp256k1_fe_normalize(&r.x);
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secp256k1_fe_get_b32(&sig->data[0], &r.x);
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secp256k1_sha256_initialize(&sha);
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secp256k1_sha256_write(&sha, &sig->data[0], 32);
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secp256k1_eckey_pubkey_serialize(&pk, buf, &buflen, 1);
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secp256k1_sha256_write(&sha, buf, buflen);
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secp256k1_sha256_write(&sha, msg32, 32);
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secp256k1_sha256_finalize(&sha, buf);
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secp256k1_scalar_set_b32(&e, buf, NULL);
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secp256k1_scalar_mul(&e, &e, &x);
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secp256k1_scalar_add(&e, &e, &k);
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secp256k1_scalar_get_b32(&sig->data[32], &e);
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secp256k1_scalar_clear(&k);
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secp256k1_scalar_clear(&x);
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return 1;
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}
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/* Helper function for verification and batch verification.
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* Computes R = sG - eP. */
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static int secp256k1_schnorrsig_real_verify(const secp256k1_context* ctx, secp256k1_gej *rj, const secp256k1_scalar *s, const secp256k1_scalar *e, const secp256k1_pubkey *pk) {
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secp256k1_scalar nege;
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secp256k1_ge pkp;
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secp256k1_gej pkj;
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secp256k1_scalar_negate(&nege, e);
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if (!secp256k1_pubkey_load(ctx, &pkp, pk)) {
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return 0;
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}
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secp256k1_gej_set_ge(&pkj, &pkp);
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/* rj = s*G + (-e)*pkj */
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secp256k1_ecmult(&ctx->ecmult_ctx, rj, &pkj, &nege, s);
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return 1;
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}
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int secp256k1_schnorrsig_verify(const secp256k1_context* ctx, const secp256k1_schnorrsig *sig, const unsigned char *msg32, const secp256k1_pubkey *pk) {
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secp256k1_scalar s;
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secp256k1_scalar e;
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secp256k1_gej rj;
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secp256k1_fe rx;
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secp256k1_sha256 sha;
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unsigned char buf[33];
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size_t buflen = sizeof(buf);
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int overflow;
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VERIFY_CHECK(ctx != NULL);
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ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
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ARG_CHECK(sig != NULL);
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ARG_CHECK(msg32 != NULL);
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ARG_CHECK(pk != NULL);
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if (!secp256k1_fe_set_b32(&rx, &sig->data[0])) {
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return 0;
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}
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secp256k1_scalar_set_b32(&s, &sig->data[32], &overflow);
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if (overflow) {
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return 0;
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}
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secp256k1_sha256_initialize(&sha);
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secp256k1_sha256_write(&sha, &sig->data[0], 32);
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secp256k1_ec_pubkey_serialize(ctx, buf, &buflen, pk, SECP256K1_EC_COMPRESSED);
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secp256k1_sha256_write(&sha, buf, buflen);
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secp256k1_sha256_write(&sha, msg32, 32);
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secp256k1_sha256_finalize(&sha, buf);
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secp256k1_scalar_set_b32(&e, buf, NULL);
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if (!secp256k1_schnorrsig_real_verify(ctx, &rj, &s, &e, pk)
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|| !secp256k1_gej_has_quad_y_var(&rj) /* fails if rj is infinity */
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|| !secp256k1_gej_eq_x_var(&rx, &rj)) {
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return 0;
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}
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return 1;
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}
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/* Data that is used by the batch verification ecmult callback */
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typedef struct {
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const secp256k1_context *ctx;
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/* Seed for the random number generator */
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unsigned char chacha_seed[32];
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/* Caches randomizers generated by the PRNG which returns two randomizers per call. Caching
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* avoids having to call the PRNG twice as often. The very first randomizer will be set to 1 and
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* the PRNG is called at every odd indexed schnorrsig to fill the cache. */
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secp256k1_scalar randomizer_cache[2];
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/* Signature, message, public key tuples to verify */
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const secp256k1_schnorrsig *const *sig;
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const unsigned char *const *msg32;
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const secp256k1_pubkey *const *pk;
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size_t n_sigs;
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} secp256k1_schnorrsig_verify_ecmult_context;
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/* Callback function which is called by ecmult_multi in order to convert the ecmult_context
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* consisting of signature, message and public key tuples into scalars and points. */
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static int secp256k1_schnorrsig_verify_batch_ecmult_callback(secp256k1_scalar *sc, secp256k1_ge *pt, size_t idx, void *data) {
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secp256k1_schnorrsig_verify_ecmult_context *ecmult_context = (secp256k1_schnorrsig_verify_ecmult_context *) data;
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if (idx % 4 == 2) {
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/* Every idx corresponds to a (scalar,point)-tuple. So this callback is called with 4
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* consecutive tuples before we need to call the RNG for new randomizers:
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* (-randomizer_cache[0], R1)
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* (-randomizer_cache[0]*e1, P1)
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* (-randomizer_cache[1], R2)
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* (-randomizer_cache[1]*e2, P2) */
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secp256k1_scalar_chacha20(&ecmult_context->randomizer_cache[0], &ecmult_context->randomizer_cache[1], ecmult_context->chacha_seed, idx / 4);
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}
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/* R */
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if (idx % 2 == 0) {
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secp256k1_fe rx;
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*sc = ecmult_context->randomizer_cache[(idx / 2) % 2];
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if (!secp256k1_fe_set_b32(&rx, &ecmult_context->sig[idx / 2]->data[0])) {
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return 0;
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}
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if (!secp256k1_ge_set_xquad(pt, &rx)) {
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return 0;
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}
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/* eP */
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} else {
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unsigned char buf[33];
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size_t buflen = sizeof(buf);
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secp256k1_sha256 sha;
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secp256k1_sha256_initialize(&sha);
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secp256k1_sha256_write(&sha, &ecmult_context->sig[idx / 2]->data[0], 32);
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secp256k1_ec_pubkey_serialize(ecmult_context->ctx, buf, &buflen, ecmult_context->pk[idx / 2], SECP256K1_EC_COMPRESSED);
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secp256k1_sha256_write(&sha, buf, buflen);
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secp256k1_sha256_write(&sha, ecmult_context->msg32[idx / 2], 32);
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secp256k1_sha256_finalize(&sha, buf);
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secp256k1_scalar_set_b32(sc, buf, NULL);
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secp256k1_scalar_mul(sc, sc, &ecmult_context->randomizer_cache[(idx / 2) % 2]);
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if (!secp256k1_pubkey_load(ecmult_context->ctx, pt, ecmult_context->pk[idx / 2])) {
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return 0;
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}
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}
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return 1;
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}
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/** Helper function for batch verification. Hashes signature verification data into the
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* randomization seed and initializes ecmult_context.
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*
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* Returns 1 if the randomizer was successfully initialized.
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*
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* Args: ctx: a secp256k1 context object
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* Out: ecmult_context: context for batch_ecmult_callback
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* In/Out sha: an initialized sha256 object which hashes the schnorrsig input in order to get a
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* seed for the randomizer PRNG
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* In: sig: array of signatures, or NULL if there are no signatures
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* msg32: array of messages, or NULL if there are no signatures
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* pk: array of public keys, or NULL if there are no signatures
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* n_sigs: number of signatures in above arrays (must be 0 if they are NULL)
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*/
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static int secp256k1_schnorrsig_verify_batch_init_randomizer(const secp256k1_context *ctx, secp256k1_schnorrsig_verify_ecmult_context *ecmult_context, secp256k1_sha256 *sha, const secp256k1_schnorrsig *const *sig, const unsigned char *const *msg32, const secp256k1_pubkey *const *pk, size_t n_sigs) {
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size_t i;
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if (n_sigs > 0) {
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ARG_CHECK(sig != NULL);
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ARG_CHECK(msg32 != NULL);
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ARG_CHECK(pk != NULL);
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}
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for (i = 0; i < n_sigs; i++) {
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unsigned char buf[33];
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size_t buflen = sizeof(buf);
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secp256k1_sha256_write(sha, sig[i]->data, 64);
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secp256k1_sha256_write(sha, msg32[i], 32);
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secp256k1_ec_pubkey_serialize(ctx, buf, &buflen, pk[i], SECP256K1_EC_COMPRESSED);
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secp256k1_sha256_write(sha, buf, buflen);
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}
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ecmult_context->ctx = ctx;
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ecmult_context->sig = sig;
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ecmult_context->msg32 = msg32;
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ecmult_context->pk = pk;
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ecmult_context->n_sigs = n_sigs;
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return 1;
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}
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/** Helper function for batch verification. Sums the s part of all signatures multiplied by their
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* randomizer.
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*
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* Returns 1 if s is successfully summed.
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*
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* In/Out: s: the s part of the input sigs is added to this s argument
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* In: chacha_seed: PRNG seed for computing randomizers
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* sig: array of signatures, or NULL if there are no signatures
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* n_sigs: number of signatures in above array (must be 0 if they are NULL)
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*/
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static int secp256k1_schnorrsig_verify_batch_sum_s(secp256k1_scalar *s, unsigned char *chacha_seed, const secp256k1_schnorrsig *const *sig, size_t n_sigs) {
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secp256k1_scalar randomizer_cache[2];
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size_t i;
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secp256k1_scalar_set_int(&randomizer_cache[0], 1);
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for (i = 0; i < n_sigs; i++) {
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int overflow;
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secp256k1_scalar term;
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if (i % 2 == 1) {
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secp256k1_scalar_chacha20(&randomizer_cache[0], &randomizer_cache[1], chacha_seed, i / 2);
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}
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secp256k1_scalar_set_b32(&term, &sig[i]->data[32], &overflow);
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if (overflow) {
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return 0;
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}
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secp256k1_scalar_mul(&term, &term, &randomizer_cache[i % 2]);
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secp256k1_scalar_add(s, s, &term);
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}
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return 1;
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}
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/* schnorrsig batch verification.
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* Seeds a random number generator with the inputs and derives a random number ai for every
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* signature i. Fails if y-coordinate of any R is not a quadratic residue or if
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* 0 != -(s1 + a2*s2 + ... + au*su)G + R1 + a2*R2 + ... + au*Ru + e1*P1 + (a2*e2)P2 + ... + (au*eu)Pu. */
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int secp256k1_schnorrsig_verify_batch(const secp256k1_context *ctx, secp256k1_scratch *scratch, const secp256k1_schnorrsig *const *sig, const unsigned char *const *msg32, const secp256k1_pubkey *const *pk, size_t n_sigs) {
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secp256k1_schnorrsig_verify_ecmult_context ecmult_context;
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secp256k1_sha256 sha;
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secp256k1_scalar s;
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secp256k1_gej rj;
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VERIFY_CHECK(ctx != NULL);
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ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
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ARG_CHECK(scratch != NULL);
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/* Check that n_sigs is less than half of the maximum size_t value. This is necessary because
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* the number of points given to ecmult_multi is 2*n_sigs. */
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ARG_CHECK(n_sigs <= SIZE_MAX / 2);
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/* Check that n_sigs is less than 2^31 to ensure the same behavior of this function on 32-bit
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* and 64-bit platforms. */
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ARG_CHECK(n_sigs < ((uint32_t)1 << 31));
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secp256k1_sha256_initialize(&sha);
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if (!secp256k1_schnorrsig_verify_batch_init_randomizer(ctx, &ecmult_context, &sha, sig, msg32, pk, n_sigs)) {
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return 0;
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}
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secp256k1_sha256_finalize(&sha, ecmult_context.chacha_seed);
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secp256k1_scalar_set_int(&ecmult_context.randomizer_cache[0], 1);
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secp256k1_scalar_clear(&s);
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if (!secp256k1_schnorrsig_verify_batch_sum_s(&s, ecmult_context.chacha_seed, sig, n_sigs)) {
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return 0;
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}
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secp256k1_scalar_negate(&s, &s);
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return secp256k1_ecmult_multi_var(&ctx->error_callback, &ctx->ecmult_ctx, scratch, &rj, &s, secp256k1_schnorrsig_verify_batch_ecmult_callback, (void *) &ecmult_context, 2 * n_sigs)
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&& secp256k1_gej_is_infinity(&rj);
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}
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#endif
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726
src/modules/schnorrsig/tests_impl.h
Normal file
726
src/modules/schnorrsig/tests_impl.h
Normal file
@@ -0,0 +1,726 @@
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/**********************************************************************
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* Copyright (c) 2018 Andrew Poelstra *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
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**********************************************************************/
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#ifndef _SECP256K1_MODULE_SCHNORRSIG_TESTS_
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#define _SECP256K1_MODULE_SCHNORRSIG_TESTS_
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#include "secp256k1_schnorrsig.h"
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void test_schnorrsig_serialize(void) {
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secp256k1_schnorrsig sig;
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unsigned char in[64];
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unsigned char out[64];
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memset(in, 0x12, 64);
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CHECK(secp256k1_schnorrsig_parse(ctx, &sig, in));
|
||||
CHECK(secp256k1_schnorrsig_serialize(ctx, out, &sig));
|
||||
CHECK(memcmp(in, out, 64) == 0);
|
||||
}
|
||||
|
||||
void test_schnorrsig_api(secp256k1_scratch_space *scratch) {
|
||||
unsigned char sk1[32];
|
||||
unsigned char sk2[32];
|
||||
unsigned char sk3[32];
|
||||
unsigned char msg[32];
|
||||
unsigned char sig64[64];
|
||||
secp256k1_pubkey pk[3];
|
||||
secp256k1_schnorrsig sig;
|
||||
const secp256k1_schnorrsig *sigptr = &sig;
|
||||
const unsigned char *msgptr = msg;
|
||||
const secp256k1_pubkey *pkptr = &pk[0];
|
||||
int nonce_is_negated;
|
||||
|
||||
/** setup **/
|
||||
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);
|
||||
int ecount;
|
||||
|
||||
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);
|
||||
|
||||
secp256k1_rand256(sk1);
|
||||
secp256k1_rand256(sk2);
|
||||
secp256k1_rand256(sk3);
|
||||
secp256k1_rand256(msg);
|
||||
CHECK(secp256k1_ec_pubkey_create(ctx, &pk[0], sk1) == 1);
|
||||
CHECK(secp256k1_ec_pubkey_create(ctx, &pk[1], sk2) == 1);
|
||||
CHECK(secp256k1_ec_pubkey_create(ctx, &pk[2], sk3) == 1);
|
||||
|
||||
/** main test body **/
|
||||
ecount = 0;
|
||||
CHECK(secp256k1_schnorrsig_sign(none, &sig, &nonce_is_negated, msg, sk1, NULL, NULL) == 0);
|
||||
CHECK(ecount == 1);
|
||||
CHECK(secp256k1_schnorrsig_sign(vrfy, &sig, &nonce_is_negated, msg, sk1, NULL, NULL) == 0);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_sign(sign, &sig, &nonce_is_negated, msg, sk1, NULL, NULL) == 1);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_sign(sign, NULL, &nonce_is_negated, msg, sk1, NULL, NULL) == 0);
|
||||
CHECK(ecount == 3);
|
||||
CHECK(secp256k1_schnorrsig_sign(sign, &sig, NULL, msg, sk1, NULL, NULL) == 1);
|
||||
CHECK(ecount == 3);
|
||||
CHECK(secp256k1_schnorrsig_sign(sign, &sig, &nonce_is_negated, NULL, sk1, NULL, NULL) == 0);
|
||||
CHECK(ecount == 4);
|
||||
CHECK(secp256k1_schnorrsig_sign(sign, &sig, &nonce_is_negated, msg, NULL, NULL, NULL) == 0);
|
||||
CHECK(ecount == 5);
|
||||
|
||||
ecount = 0;
|
||||
CHECK(secp256k1_schnorrsig_serialize(none, sig64, &sig) == 1);
|
||||
CHECK(ecount == 0);
|
||||
CHECK(secp256k1_schnorrsig_serialize(none, NULL, &sig) == 0);
|
||||
CHECK(ecount == 1);
|
||||
CHECK(secp256k1_schnorrsig_serialize(none, sig64, NULL) == 0);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_parse(none, &sig, sig64) == 1);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_parse(none, NULL, sig64) == 0);
|
||||
CHECK(ecount == 3);
|
||||
CHECK(secp256k1_schnorrsig_parse(none, &sig, NULL) == 0);
|
||||
CHECK(ecount == 4);
|
||||
|
||||
ecount = 0;
|
||||
CHECK(secp256k1_schnorrsig_verify(none, &sig, msg, &pk[0]) == 0);
|
||||
CHECK(ecount == 1);
|
||||
CHECK(secp256k1_schnorrsig_verify(sign, &sig, msg, &pk[0]) == 0);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_verify(vrfy, &sig, msg, &pk[0]) == 1);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_verify(vrfy, NULL, msg, &pk[0]) == 0);
|
||||
CHECK(ecount == 3);
|
||||
CHECK(secp256k1_schnorrsig_verify(vrfy, &sig, NULL, &pk[0]) == 0);
|
||||
CHECK(ecount == 4);
|
||||
CHECK(secp256k1_schnorrsig_verify(vrfy, &sig, msg, NULL) == 0);
|
||||
CHECK(ecount == 5);
|
||||
|
||||
ecount = 0;
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(none, scratch, &sigptr, &msgptr, &pkptr, 1) == 0);
|
||||
CHECK(ecount == 1);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(sign, scratch, &sigptr, &msgptr, &pkptr, 1) == 0);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, &sigptr, &msgptr, &pkptr, 1) == 1);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, NULL, NULL, NULL, 0) == 1);
|
||||
CHECK(ecount == 2);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, NULL, &msgptr, &pkptr, 1) == 0);
|
||||
CHECK(ecount == 3);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, &sigptr, NULL, &pkptr, 1) == 0);
|
||||
CHECK(ecount == 4);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, &sigptr, &msgptr, NULL, 1) == 0);
|
||||
CHECK(ecount == 5);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, &sigptr, &msgptr, &pkptr, (size_t)1 << (sizeof(size_t)*8-1)) == 0);
|
||||
CHECK(ecount == 6);
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(vrfy, scratch, &sigptr, &msgptr, &pkptr, (uint32_t)1 << 31) == 0);
|
||||
CHECK(ecount == 7);
|
||||
|
||||
secp256k1_context_destroy(none);
|
||||
secp256k1_context_destroy(sign);
|
||||
secp256k1_context_destroy(vrfy);
|
||||
secp256k1_context_destroy(both);
|
||||
}
|
||||
|
||||
/* Helper function for schnorrsig_bip_vectors
|
||||
* Signs the message and checks that it's the same as expected_sig. */
|
||||
void test_schnorrsig_bip_vectors_check_signing(const unsigned char *sk, const unsigned char *pk_serialized, const unsigned char *msg, const unsigned char *expected_sig, const int expected_nonce_is_negated) {
|
||||
secp256k1_schnorrsig sig;
|
||||
unsigned char serialized_sig[64];
|
||||
secp256k1_pubkey pk;
|
||||
int nonce_is_negated;
|
||||
|
||||
CHECK(secp256k1_schnorrsig_sign(ctx, &sig, &nonce_is_negated, msg, sk, NULL, NULL));
|
||||
CHECK(nonce_is_negated == expected_nonce_is_negated);
|
||||
CHECK(secp256k1_schnorrsig_serialize(ctx, serialized_sig, &sig));
|
||||
CHECK(memcmp(serialized_sig, expected_sig, 64) == 0);
|
||||
|
||||
CHECK(secp256k1_ec_pubkey_parse(ctx, &pk, pk_serialized, 33));
|
||||
CHECK(secp256k1_schnorrsig_verify(ctx, &sig, msg, &pk));
|
||||
}
|
||||
|
||||
/* Helper function for schnorrsig_bip_vectors
|
||||
* Checks that both verify and verify_batch return the same value as expected. */
|
||||
void test_schnorrsig_bip_vectors_check_verify(secp256k1_scratch_space *scratch, const unsigned char *pk_serialized, const unsigned char *msg32, const unsigned char *sig_serialized, int expected) {
|
||||
const unsigned char *msg_arr[1];
|
||||
const secp256k1_schnorrsig *sig_arr[1];
|
||||
const secp256k1_pubkey *pk_arr[1];
|
||||
secp256k1_pubkey pk;
|
||||
secp256k1_schnorrsig sig;
|
||||
|
||||
CHECK(secp256k1_ec_pubkey_parse(ctx, &pk, pk_serialized, 33));
|
||||
CHECK(secp256k1_schnorrsig_parse(ctx, &sig, sig_serialized));
|
||||
|
||||
sig_arr[0] = &sig;
|
||||
msg_arr[0] = msg32;
|
||||
pk_arr[0] = &pk;
|
||||
|
||||
CHECK(expected == secp256k1_schnorrsig_verify(ctx, &sig, msg32, &pk));
|
||||
CHECK(expected == secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 1));
|
||||
}
|
||||
|
||||
/* Test vectors according to BIP-schnorr
|
||||
* (https://github.com/sipa/bips/blob/7f6a73e53c8bbcf2d008ea0546f76433e22094a8/bip-schnorr/test-vectors.csv).
|
||||
*/
|
||||
void test_schnorrsig_bip_vectors(secp256k1_scratch_space *scratch) {
|
||||
{
|
||||
/* Test vector 1 */
|
||||
const unsigned char sk1[32] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01
|
||||
};
|
||||
const unsigned char pk1[33] = {
|
||||
0x02, 0x79, 0xBE, 0x66, 0x7E, 0xF9, 0xDC, 0xBB,
|
||||
0xAC, 0x55, 0xA0, 0x62, 0x95, 0xCE, 0x87, 0x0B,
|
||||
0x07, 0x02, 0x9B, 0xFC, 0xDB, 0x2D, 0xCE, 0x28,
|
||||
0xD9, 0x59, 0xF2, 0x81, 0x5B, 0x16, 0xF8, 0x17,
|
||||
0x98
|
||||
};
|
||||
const unsigned char msg1[32] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
};
|
||||
const unsigned char sig1[64] = {
|
||||
0x78, 0x7A, 0x84, 0x8E, 0x71, 0x04, 0x3D, 0x28,
|
||||
0x0C, 0x50, 0x47, 0x0E, 0x8E, 0x15, 0x32, 0xB2,
|
||||
0xDD, 0x5D, 0x20, 0xEE, 0x91, 0x2A, 0x45, 0xDB,
|
||||
0xDD, 0x2B, 0xD1, 0xDF, 0xBF, 0x18, 0x7E, 0xF6,
|
||||
0x70, 0x31, 0xA9, 0x88, 0x31, 0x85, 0x9D, 0xC3,
|
||||
0x4D, 0xFF, 0xEE, 0xDD, 0xA8, 0x68, 0x31, 0x84,
|
||||
0x2C, 0xCD, 0x00, 0x79, 0xE1, 0xF9, 0x2A, 0xF1,
|
||||
0x77, 0xF7, 0xF2, 0x2C, 0xC1, 0xDC, 0xED, 0x05
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_signing(sk1, pk1, msg1, sig1, 1);
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk1, msg1, sig1, 1);
|
||||
}
|
||||
{
|
||||
/* Test vector 2 */
|
||||
const unsigned char sk2[32] = {
|
||||
0xB7, 0xE1, 0x51, 0x62, 0x8A, 0xED, 0x2A, 0x6A,
|
||||
0xBF, 0x71, 0x58, 0x80, 0x9C, 0xF4, 0xF3, 0xC7,
|
||||
0x62, 0xE7, 0x16, 0x0F, 0x38, 0xB4, 0xDA, 0x56,
|
||||
0xA7, 0x84, 0xD9, 0x04, 0x51, 0x90, 0xCF, 0xEF
|
||||
};
|
||||
const unsigned char pk2[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg2[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig2[64] = {
|
||||
0x2A, 0x29, 0x8D, 0xAC, 0xAE, 0x57, 0x39, 0x5A,
|
||||
0x15, 0xD0, 0x79, 0x5D, 0xDB, 0xFD, 0x1D, 0xCB,
|
||||
0x56, 0x4D, 0xA8, 0x2B, 0x0F, 0x26, 0x9B, 0xC7,
|
||||
0x0A, 0x74, 0xF8, 0x22, 0x04, 0x29, 0xBA, 0x1D,
|
||||
0x1E, 0x51, 0xA2, 0x2C, 0xCE, 0xC3, 0x55, 0x99,
|
||||
0xB8, 0xF2, 0x66, 0x91, 0x22, 0x81, 0xF8, 0x36,
|
||||
0x5F, 0xFC, 0x2D, 0x03, 0x5A, 0x23, 0x04, 0x34,
|
||||
0xA1, 0xA6, 0x4D, 0xC5, 0x9F, 0x70, 0x13, 0xFD
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_signing(sk2, pk2, msg2, sig2, 0);
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk2, msg2, sig2, 1);
|
||||
}
|
||||
{
|
||||
/* Test vector 3 */
|
||||
const unsigned char sk3[32] = {
|
||||
0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
|
||||
0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
|
||||
0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
|
||||
0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x14, 0xE5, 0xC7
|
||||
};
|
||||
const unsigned char pk3[33] = {
|
||||
0x03, 0xFA, 0xC2, 0x11, 0x4C, 0x2F, 0xBB, 0x09,
|
||||
0x15, 0x27, 0xEB, 0x7C, 0x64, 0xEC, 0xB1, 0x1F,
|
||||
0x80, 0x21, 0xCB, 0x45, 0xE8, 0xE7, 0x80, 0x9D,
|
||||
0x3C, 0x09, 0x38, 0xE4, 0xB8, 0xC0, 0xE5, 0xF8,
|
||||
0x4B
|
||||
};
|
||||
const unsigned char msg3[32] = {
|
||||
0x5E, 0x2D, 0x58, 0xD8, 0xB3, 0xBC, 0xDF, 0x1A,
|
||||
0xBA, 0xDE, 0xC7, 0x82, 0x90, 0x54, 0xF9, 0x0D,
|
||||
0xDA, 0x98, 0x05, 0xAA, 0xB5, 0x6C, 0x77, 0x33,
|
||||
0x30, 0x24, 0xB9, 0xD0, 0xA5, 0x08, 0xB7, 0x5C
|
||||
};
|
||||
const unsigned char sig3[64] = {
|
||||
0x00, 0xDA, 0x9B, 0x08, 0x17, 0x2A, 0x9B, 0x6F,
|
||||
0x04, 0x66, 0xA2, 0xDE, 0xFD, 0x81, 0x7F, 0x2D,
|
||||
0x7A, 0xB4, 0x37, 0xE0, 0xD2, 0x53, 0xCB, 0x53,
|
||||
0x95, 0xA9, 0x63, 0x86, 0x6B, 0x35, 0x74, 0xBE,
|
||||
0x00, 0x88, 0x03, 0x71, 0xD0, 0x17, 0x66, 0x93,
|
||||
0x5B, 0x92, 0xD2, 0xAB, 0x4C, 0xD5, 0xC8, 0xA2,
|
||||
0xA5, 0x83, 0x7E, 0xC5, 0x7F, 0xED, 0x76, 0x60,
|
||||
0x77, 0x3A, 0x05, 0xF0, 0xDE, 0x14, 0x23, 0x80
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_signing(sk3, pk3, msg3, sig3, 0);
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk3, msg3, sig3, 1);
|
||||
}
|
||||
{
|
||||
/* Test vector 4 */
|
||||
const unsigned char pk4[33] = {
|
||||
0x03, 0xDE, 0xFD, 0xEA, 0x4C, 0xDB, 0x67, 0x77,
|
||||
0x50, 0xA4, 0x20, 0xFE, 0xE8, 0x07, 0xEA, 0xCF,
|
||||
0x21, 0xEB, 0x98, 0x98, 0xAE, 0x79, 0xB9, 0x76,
|
||||
0x87, 0x66, 0xE4, 0xFA, 0xA0, 0x4A, 0x2D, 0x4A,
|
||||
0x34
|
||||
};
|
||||
const unsigned char msg4[32] = {
|
||||
0x4D, 0xF3, 0xC3, 0xF6, 0x8F, 0xCC, 0x83, 0xB2,
|
||||
0x7E, 0x9D, 0x42, 0xC9, 0x04, 0x31, 0xA7, 0x24,
|
||||
0x99, 0xF1, 0x78, 0x75, 0xC8, 0x1A, 0x59, 0x9B,
|
||||
0x56, 0x6C, 0x98, 0x89, 0xB9, 0x69, 0x67, 0x03
|
||||
};
|
||||
const unsigned char sig4[64] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x3B, 0x78, 0xCE, 0x56, 0x3F,
|
||||
0x89, 0xA0, 0xED, 0x94, 0x14, 0xF5, 0xAA, 0x28,
|
||||
0xAD, 0x0D, 0x96, 0xD6, 0x79, 0x5F, 0x9C, 0x63,
|
||||
0x02, 0xA8, 0xDC, 0x32, 0xE6, 0x4E, 0x86, 0xA3,
|
||||
0x33, 0xF2, 0x0E, 0xF5, 0x6E, 0xAC, 0x9B, 0xA3,
|
||||
0x0B, 0x72, 0x46, 0xD6, 0xD2, 0x5E, 0x22, 0xAD,
|
||||
0xB8, 0xC6, 0xBE, 0x1A, 0xEB, 0x08, 0xD4, 0x9D
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk4, msg4, sig4, 1);
|
||||
}
|
||||
{
|
||||
/* Test vector 5 */
|
||||
const unsigned char pk5[33] = {
|
||||
0x03, 0x1B, 0x84, 0xC5, 0x56, 0x7B, 0x12, 0x64,
|
||||
0x40, 0x99, 0x5D, 0x3E, 0xD5, 0xAA, 0xBA, 0x05,
|
||||
0x65, 0xD7, 0x1E, 0x18, 0x34, 0x60, 0x48, 0x19,
|
||||
0xFF, 0x9C, 0x17, 0xF5, 0xE9, 0xD5, 0xDD, 0x07,
|
||||
0x8F
|
||||
};
|
||||
const unsigned char msg5[32] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
};
|
||||
const unsigned char sig5[64] = {
|
||||
0x52, 0x81, 0x85, 0x79, 0xAC, 0xA5, 0x97, 0x67,
|
||||
0xE3, 0x29, 0x1D, 0x91, 0xB7, 0x6B, 0x63, 0x7B,
|
||||
0xEF, 0x06, 0x20, 0x83, 0x28, 0x49, 0x92, 0xF2,
|
||||
0xD9, 0x5F, 0x56, 0x4C, 0xA6, 0xCB, 0x4E, 0x35,
|
||||
0x30, 0xB1, 0xDA, 0x84, 0x9C, 0x8E, 0x83, 0x04,
|
||||
0xAD, 0xC0, 0xCF, 0xE8, 0x70, 0x66, 0x03, 0x34,
|
||||
0xB3, 0xCF, 0xC1, 0x8E, 0x82, 0x5E, 0xF1, 0xDB,
|
||||
0x34, 0xCF, 0xAE, 0x3D, 0xFC, 0x5D, 0x81, 0x87
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk5, msg5, sig5, 1);
|
||||
}
|
||||
{
|
||||
/* Test vector 6 */
|
||||
const unsigned char pk6[33] = {
|
||||
0x03, 0xFA, 0xC2, 0x11, 0x4C, 0x2F, 0xBB, 0x09,
|
||||
0x15, 0x27, 0xEB, 0x7C, 0x64, 0xEC, 0xB1, 0x1F,
|
||||
0x80, 0x21, 0xCB, 0x45, 0xE8, 0xE7, 0x80, 0x9D,
|
||||
0x3C, 0x09, 0x38, 0xE4, 0xB8, 0xC0, 0xE5, 0xF8,
|
||||
0x4B
|
||||
};
|
||||
const unsigned char msg6[32] = {
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
|
||||
};
|
||||
const unsigned char sig6[64] = {
|
||||
0x57, 0x0D, 0xD4, 0xCA, 0x83, 0xD4, 0xE6, 0x31,
|
||||
0x7B, 0x8E, 0xE6, 0xBA, 0xE8, 0x34, 0x67, 0xA1,
|
||||
0xBF, 0x41, 0x9D, 0x07, 0x67, 0x12, 0x2D, 0xE4,
|
||||
0x09, 0x39, 0x44, 0x14, 0xB0, 0x50, 0x80, 0xDC,
|
||||
0xE9, 0xEE, 0x5F, 0x23, 0x7C, 0xBD, 0x10, 0x8E,
|
||||
0xAB, 0xAE, 0x1E, 0x37, 0x75, 0x9A, 0xE4, 0x7F,
|
||||
0x8E, 0x42, 0x03, 0xDA, 0x35, 0x32, 0xEB, 0x28,
|
||||
0xDB, 0x86, 0x0F, 0x33, 0xD6, 0x2D, 0x49, 0xBD
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk6, msg6, sig6, 1);
|
||||
}
|
||||
{
|
||||
/* Test vector 7 */
|
||||
const unsigned char pk7[33] = {
|
||||
0x03, 0xEE, 0xFD, 0xEA, 0x4C, 0xDB, 0x67, 0x77,
|
||||
0x50, 0xA4, 0x20, 0xFE, 0xE8, 0x07, 0xEA, 0xCF,
|
||||
0x21, 0xEB, 0x98, 0x98, 0xAE, 0x79, 0xB9, 0x76,
|
||||
0x87, 0x66, 0xE4, 0xFA, 0xA0, 0x4A, 0x2D, 0x4A,
|
||||
0x34
|
||||
};
|
||||
secp256k1_pubkey pk7_parsed;
|
||||
/* No need to check the signature of the test vector as parsing the pubkey already fails */
|
||||
CHECK(!secp256k1_ec_pubkey_parse(ctx, &pk7_parsed, pk7, 33));
|
||||
}
|
||||
{
|
||||
/* Test vector 8 */
|
||||
const unsigned char pk8[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg8[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig8[64] = {
|
||||
0x2A, 0x29, 0x8D, 0xAC, 0xAE, 0x57, 0x39, 0x5A,
|
||||
0x15, 0xD0, 0x79, 0x5D, 0xDB, 0xFD, 0x1D, 0xCB,
|
||||
0x56, 0x4D, 0xA8, 0x2B, 0x0F, 0x26, 0x9B, 0xC7,
|
||||
0x0A, 0x74, 0xF8, 0x22, 0x04, 0x29, 0xBA, 0x1D,
|
||||
0xFA, 0x16, 0xAE, 0xE0, 0x66, 0x09, 0x28, 0x0A,
|
||||
0x19, 0xB6, 0x7A, 0x24, 0xE1, 0x97, 0x7E, 0x46,
|
||||
0x97, 0x71, 0x2B, 0x5F, 0xD2, 0x94, 0x39, 0x14,
|
||||
0xEC, 0xD5, 0xF7, 0x30, 0x90, 0x1B, 0x4A, 0xB7
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk8, msg8, sig8, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 9 */
|
||||
const unsigned char pk9[33] = {
|
||||
0x03, 0xFA, 0xC2, 0x11, 0x4C, 0x2F, 0xBB, 0x09,
|
||||
0x15, 0x27, 0xEB, 0x7C, 0x64, 0xEC, 0xB1, 0x1F,
|
||||
0x80, 0x21, 0xCB, 0x45, 0xE8, 0xE7, 0x80, 0x9D,
|
||||
0x3C, 0x09, 0x38, 0xE4, 0xB8, 0xC0, 0xE5, 0xF8,
|
||||
0x4B
|
||||
};
|
||||
const unsigned char msg9[32] = {
|
||||
0x5E, 0x2D, 0x58, 0xD8, 0xB3, 0xBC, 0xDF, 0x1A,
|
||||
0xBA, 0xDE, 0xC7, 0x82, 0x90, 0x54, 0xF9, 0x0D,
|
||||
0xDA, 0x98, 0x05, 0xAA, 0xB5, 0x6C, 0x77, 0x33,
|
||||
0x30, 0x24, 0xB9, 0xD0, 0xA5, 0x08, 0xB7, 0x5C
|
||||
};
|
||||
const unsigned char sig9[64] = {
|
||||
0x00, 0xDA, 0x9B, 0x08, 0x17, 0x2A, 0x9B, 0x6F,
|
||||
0x04, 0x66, 0xA2, 0xDE, 0xFD, 0x81, 0x7F, 0x2D,
|
||||
0x7A, 0xB4, 0x37, 0xE0, 0xD2, 0x53, 0xCB, 0x53,
|
||||
0x95, 0xA9, 0x63, 0x86, 0x6B, 0x35, 0x74, 0xBE,
|
||||
0xD0, 0x92, 0xF9, 0xD8, 0x60, 0xF1, 0x77, 0x6A,
|
||||
0x1F, 0x74, 0x12, 0xAD, 0x8A, 0x1E, 0xB5, 0x0D,
|
||||
0xAC, 0xCC, 0x22, 0x2B, 0xC8, 0xC0, 0xE2, 0x6B,
|
||||
0x20, 0x56, 0xDF, 0x2F, 0x27, 0x3E, 0xFD, 0xEC
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk9, msg9, sig9, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 10 */
|
||||
const unsigned char pk10[33] = {
|
||||
0x02, 0x79, 0xBE, 0x66, 0x7E, 0xF9, 0xDC, 0xBB,
|
||||
0xAC, 0x55, 0xA0, 0x62, 0x95, 0xCE, 0x87, 0x0B,
|
||||
0x07, 0x02, 0x9B, 0xFC, 0xDB, 0x2D, 0xCE, 0x28,
|
||||
0xD9, 0x59, 0xF2, 0x81, 0x5B, 0x16, 0xF8, 0x17,
|
||||
0x98
|
||||
};
|
||||
const unsigned char msg10[32] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
};
|
||||
const unsigned char sig10[64] = {
|
||||
0x78, 0x7A, 0x84, 0x8E, 0x71, 0x04, 0x3D, 0x28,
|
||||
0x0C, 0x50, 0x47, 0x0E, 0x8E, 0x15, 0x32, 0xB2,
|
||||
0xDD, 0x5D, 0x20, 0xEE, 0x91, 0x2A, 0x45, 0xDB,
|
||||
0xDD, 0x2B, 0xD1, 0xDF, 0xBF, 0x18, 0x7E, 0xF6,
|
||||
0x8F, 0xCE, 0x56, 0x77, 0xCE, 0x7A, 0x62, 0x3C,
|
||||
0xB2, 0x00, 0x11, 0x22, 0x57, 0x97, 0xCE, 0x7A,
|
||||
0x8D, 0xE1, 0xDC, 0x6C, 0xCD, 0x4F, 0x75, 0x4A,
|
||||
0x47, 0xDA, 0x6C, 0x60, 0x0E, 0x59, 0x54, 0x3C
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk10, msg10, sig10, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 11 */
|
||||
const unsigned char pk11[33] = {
|
||||
0x03, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg11[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig11[64] = {
|
||||
0x2A, 0x29, 0x8D, 0xAC, 0xAE, 0x57, 0x39, 0x5A,
|
||||
0x15, 0xD0, 0x79, 0x5D, 0xDB, 0xFD, 0x1D, 0xCB,
|
||||
0x56, 0x4D, 0xA8, 0x2B, 0x0F, 0x26, 0x9B, 0xC7,
|
||||
0x0A, 0x74, 0xF8, 0x22, 0x04, 0x29, 0xBA, 0x1D,
|
||||
0x1E, 0x51, 0xA2, 0x2C, 0xCE, 0xC3, 0x55, 0x99,
|
||||
0xB8, 0xF2, 0x66, 0x91, 0x22, 0x81, 0xF8, 0x36,
|
||||
0x5F, 0xFC, 0x2D, 0x03, 0x5A, 0x23, 0x04, 0x34,
|
||||
0xA1, 0xA6, 0x4D, 0xC5, 0x9F, 0x70, 0x13, 0xFD
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk11, msg11, sig11, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 12 */
|
||||
const unsigned char pk12[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg12[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig12[64] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x9E, 0x9D, 0x01, 0xAF, 0x98, 0x8B, 0x5C, 0xED,
|
||||
0xCE, 0x47, 0x22, 0x1B, 0xFA, 0x9B, 0x22, 0x27,
|
||||
0x21, 0xF3, 0xFA, 0x40, 0x89, 0x15, 0x44, 0x4A,
|
||||
0x4B, 0x48, 0x90, 0x21, 0xDB, 0x55, 0x77, 0x5F
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk12, msg12, sig12, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 13 */
|
||||
const unsigned char pk13[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg13[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig13[64] = {
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
|
||||
0xD3, 0x7D, 0xDF, 0x02, 0x54, 0x35, 0x18, 0x36,
|
||||
0xD8, 0x4B, 0x1B, 0xD6, 0xA7, 0x95, 0xFD, 0x5D,
|
||||
0x52, 0x30, 0x48, 0xF2, 0x98, 0xC4, 0x21, 0x4D,
|
||||
0x18, 0x7F, 0xE4, 0x89, 0x29, 0x47, 0xF7, 0x28
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk13, msg13, sig13, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 14 */
|
||||
const unsigned char pk14[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg14[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x14, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig14[64] = {
|
||||
0x4A, 0x29, 0x8D, 0xAC, 0xAE, 0x57, 0x39, 0x5A,
|
||||
0x15, 0xD0, 0x79, 0x5D, 0xDB, 0xFD, 0x1D, 0xCB,
|
||||
0x56, 0x4D, 0xA8, 0x2B, 0x0F, 0x26, 0x9B, 0xC7,
|
||||
0x0A, 0x74, 0xF8, 0x22, 0x04, 0x29, 0xBA, 0x1D,
|
||||
0x1E, 0x51, 0xA2, 0x2C, 0xCE, 0xC3, 0x55, 0x99,
|
||||
0xB8, 0xF2, 0x66, 0x91, 0x22, 0x81, 0xF8, 0x36,
|
||||
0x5F, 0xFC, 0x2D, 0x03, 0x5A, 0x23, 0x04, 0x34,
|
||||
0xA1, 0xA6, 0x4D, 0xC5, 0x9F, 0x70, 0x13, 0xFD
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk14, msg14, sig14, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 15 */
|
||||
const unsigned char pk15[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg15[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig15[64] = {
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0x2F,
|
||||
0x1E, 0x51, 0xA2, 0x2C, 0xCE, 0xC3, 0x55, 0x99,
|
||||
0xB8, 0xF2, 0x66, 0x91, 0x22, 0x81, 0xF8, 0x36,
|
||||
0x5F, 0xFC, 0x2D, 0x03, 0x5A, 0x23, 0x04, 0x34,
|
||||
0xA1, 0xA6, 0x4D, 0xC5, 0x9F, 0x70, 0x13, 0xFD
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk15, msg15, sig15, 0);
|
||||
}
|
||||
{
|
||||
/* Test vector 16 */
|
||||
const unsigned char pk16[33] = {
|
||||
0x02, 0xDF, 0xF1, 0xD7, 0x7F, 0x2A, 0x67, 0x1C,
|
||||
0x5F, 0x36, 0x18, 0x37, 0x26, 0xDB, 0x23, 0x41,
|
||||
0xBE, 0x58, 0xFE, 0xAE, 0x1D, 0xA2, 0xDE, 0xCE,
|
||||
0xD8, 0x43, 0x24, 0x0F, 0x7B, 0x50, 0x2B, 0xA6,
|
||||
0x59
|
||||
};
|
||||
const unsigned char msg16[32] = {
|
||||
0x24, 0x3F, 0x6A, 0x88, 0x85, 0xA3, 0x08, 0xD3,
|
||||
0x13, 0x19, 0x8A, 0x2E, 0x03, 0x70, 0x73, 0x44,
|
||||
0xA4, 0x09, 0x38, 0x22, 0x29, 0x9F, 0x31, 0xD0,
|
||||
0x08, 0x2E, 0xFA, 0x98, 0xEC, 0x4E, 0x6C, 0x89
|
||||
};
|
||||
const unsigned char sig16[64] = {
|
||||
0x2A, 0x29, 0x8D, 0xAC, 0xAE, 0x57, 0x39, 0x5A,
|
||||
0x15, 0xD0, 0x79, 0x5D, 0xDB, 0xFD, 0x1D, 0xCB,
|
||||
0x56, 0x4D, 0xA8, 0x2B, 0x0F, 0x26, 0x9B, 0xC7,
|
||||
0x0A, 0x74, 0xF8, 0x22, 0x04, 0x29, 0xBA, 0x1D,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
||||
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE,
|
||||
0xBA, 0xAE, 0xDC, 0xE6, 0xAF, 0x48, 0xA0, 0x3B,
|
||||
0xBF, 0xD2, 0x5E, 0x8C, 0xD0, 0x36, 0x41, 0x41
|
||||
};
|
||||
test_schnorrsig_bip_vectors_check_verify(scratch, pk16, msg16, sig16, 0);
|
||||
}
|
||||
}
|
||||
|
||||
/* Nonce function that returns constant 0 */
|
||||
static int nonce_function_failing(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, const unsigned char *algo16, void *data, unsigned int counter) {
|
||||
(void) msg32;
|
||||
(void) key32;
|
||||
(void) algo16;
|
||||
(void) data;
|
||||
(void) counter;
|
||||
(void) nonce32;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Nonce function that sets nonce to 0 */
|
||||
static int nonce_function_0(unsigned char *nonce32, const unsigned char *msg32, const unsigned char *key32, const unsigned char *algo16, void *data, unsigned int counter) {
|
||||
(void) msg32;
|
||||
(void) key32;
|
||||
(void) algo16;
|
||||
(void) data;
|
||||
(void) counter;
|
||||
|
||||
memset(nonce32, 0, 32);
|
||||
return 1;
|
||||
}
|
||||
|
||||
void test_schnorrsig_sign(void) {
|
||||
unsigned char sk[32];
|
||||
const unsigned char msg[32] = "this is a msg for a schnorrsig..";
|
||||
secp256k1_schnorrsig sig;
|
||||
|
||||
memset(sk, 23, sizeof(sk));
|
||||
CHECK(secp256k1_schnorrsig_sign(ctx, &sig, NULL, msg, sk, NULL, NULL) == 1);
|
||||
|
||||
/* Overflowing secret key */
|
||||
memset(sk, 0xFF, sizeof(sk));
|
||||
CHECK(secp256k1_schnorrsig_sign(ctx, &sig, NULL, msg, sk, NULL, NULL) == 0);
|
||||
memset(sk, 23, sizeof(sk));
|
||||
|
||||
CHECK(secp256k1_schnorrsig_sign(ctx, &sig, NULL, msg, sk, nonce_function_failing, NULL) == 0);
|
||||
CHECK(secp256k1_schnorrsig_sign(ctx, &sig, NULL, msg, sk, nonce_function_0, NULL) == 0);
|
||||
}
|
||||
|
||||
#define N_SIGS 200
|
||||
/* Creates N_SIGS valid signatures and verifies them with verify and verify_batch. Then flips some
|
||||
* bits and checks that verification now fails. */
|
||||
void test_schnorrsig_sign_verify(secp256k1_scratch_space *scratch) {
|
||||
const unsigned char sk[32] = "shhhhhhhh! this key is a secret.";
|
||||
unsigned char msg[N_SIGS][32];
|
||||
secp256k1_schnorrsig sig[N_SIGS];
|
||||
size_t i;
|
||||
const secp256k1_schnorrsig *sig_arr[N_SIGS];
|
||||
const unsigned char *msg_arr[N_SIGS];
|
||||
const secp256k1_pubkey *pk_arr[N_SIGS];
|
||||
secp256k1_pubkey pk;
|
||||
|
||||
CHECK(secp256k1_ec_pubkey_create(ctx, &pk, sk));
|
||||
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(ctx, scratch, NULL, NULL, NULL, 0));
|
||||
|
||||
for (i = 0; i < N_SIGS; i++) {
|
||||
secp256k1_rand256(msg[i]);
|
||||
CHECK(secp256k1_schnorrsig_sign(ctx, &sig[i], NULL, msg[i], sk, NULL, NULL));
|
||||
CHECK(secp256k1_schnorrsig_verify(ctx, &sig[i], msg[i], &pk));
|
||||
sig_arr[i] = &sig[i];
|
||||
msg_arr[i] = msg[i];
|
||||
pk_arr[i] = &pk;
|
||||
}
|
||||
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 1));
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 2));
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 4));
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, N_SIGS));
|
||||
|
||||
{
|
||||
/* Flip a few bits in the signature and in the message and check that
|
||||
* verify and verify_batch fail */
|
||||
size_t sig_idx = secp256k1_rand_int(4);
|
||||
size_t byte_idx = secp256k1_rand_int(32);
|
||||
unsigned char xorbyte = secp256k1_rand_int(254)+1;
|
||||
sig[sig_idx].data[byte_idx] ^= xorbyte;
|
||||
CHECK(!secp256k1_schnorrsig_verify(ctx, &sig[sig_idx], msg[sig_idx], &pk));
|
||||
CHECK(!secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 4));
|
||||
sig[sig_idx].data[byte_idx] ^= xorbyte;
|
||||
|
||||
byte_idx = secp256k1_rand_int(32);
|
||||
sig[sig_idx].data[32+byte_idx] ^= xorbyte;
|
||||
CHECK(!secp256k1_schnorrsig_verify(ctx, &sig[sig_idx], msg[sig_idx], &pk));
|
||||
CHECK(!secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 4));
|
||||
sig[sig_idx].data[32+byte_idx] ^= xorbyte;
|
||||
|
||||
byte_idx = secp256k1_rand_int(32);
|
||||
msg[sig_idx][byte_idx] ^= xorbyte;
|
||||
CHECK(!secp256k1_schnorrsig_verify(ctx, &sig[sig_idx], msg[sig_idx], &pk));
|
||||
CHECK(!secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 4));
|
||||
msg[sig_idx][byte_idx] ^= xorbyte;
|
||||
|
||||
/* Check that above bitflips have been reversed correctly */
|
||||
CHECK(secp256k1_schnorrsig_verify(ctx, &sig[sig_idx], msg[sig_idx], &pk));
|
||||
CHECK(secp256k1_schnorrsig_verify_batch(ctx, scratch, sig_arr, msg_arr, pk_arr, 4));
|
||||
}
|
||||
}
|
||||
#undef N_SIGS
|
||||
|
||||
void run_schnorrsig_tests(void) {
|
||||
secp256k1_scratch_space *scratch = secp256k1_scratch_space_create(ctx, 1024 * 1024);
|
||||
|
||||
test_schnorrsig_serialize();
|
||||
test_schnorrsig_api(scratch);
|
||||
test_schnorrsig_bip_vectors(scratch);
|
||||
test_schnorrsig_sign();
|
||||
test_schnorrsig_sign_verify(scratch);
|
||||
|
||||
secp256k1_scratch_space_destroy(ctx, scratch);
|
||||
}
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user