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src/secp256k1/src/modules/schnorr/main_impl.h
- This file was added.
| Property | Old Value | New Value |
|---|---|---|
| File Mode | null | 100755 |
| /********************************************************************** | |||||
| * Copyright (c) 2017 Pieter Wuille * | |||||
| * Distributed under the MIT software license, see the accompanying * | |||||
| * file COPYING or http://www.opensource.org/licenses/mit-license.php.* | |||||
| **********************************************************************/ | |||||
| #ifndef SECP256K1_MODULE_SCHNORR_MAIN | |||||
| #define SECP256K1_MODULE_SCHNORR_MAIN | |||||
| #include "include/secp256k1_schnorr.h" | |||||
| #include "modules/schnorr/schnorr_impl.h" | |||||
| static const unsigned char secp256k1_schnorr_algo16[17] = "Schnorr+SHA256 "; | |||||
| int secp256k1_schnorr_sign( | |||||
| const secp256k1_context *ctx, | |||||
| unsigned char *sig64, | |||||
| const unsigned char *msg32, | |||||
| const unsigned char *seckey, | |||||
| const secp256k1_pubkey *pubkey, | |||||
| secp256k1_nonce_function noncefp, | |||||
| const void *noncedata | |||||
| ) { | |||||
| secp256k1_scalar sec, non; | |||||
| secp256k1_ge p; | |||||
| int ret = 0; | |||||
| int overflow = 0; | |||||
| unsigned char nonce32[32]; | |||||
| unsigned int count = 0; | |||||
| VERIFY_CHECK(ctx != NULL); | |||||
| ARG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx)); | |||||
| ARG_CHECK(msg32 != NULL); | |||||
| ARG_CHECK(sig64 != NULL); | |||||
| ARG_CHECK(seckey != NULL); | |||||
| ARG_CHECK(pubkey != NULL); | |||||
| if (noncefp == NULL) { | |||||
| noncefp = secp256k1_nonce_function_default; | |||||
| } | |||||
| secp256k1_pubkey_load(ctx, &p, pubkey); | |||||
| secp256k1_scalar_set_b32(&sec, seckey, NULL); | |||||
| while (1) { | |||||
| ret = noncefp(nonce32, msg32, seckey, secp256k1_schnorr_algo16, (void*)noncedata, count); | |||||
| if (!ret) { | |||||
| break; | |||||
| } | |||||
| secp256k1_scalar_set_b32(&non, nonce32, &overflow); | |||||
| if (!overflow && !secp256k1_scalar_is_zero(&non)) { | |||||
| if (secp256k1_schnorr_sig_sign(&ctx->ecmult_gen_ctx, sig64, &sec, &p, &non, msg32)) { | |||||
| break; | |||||
| } | |||||
| } | |||||
| count++; | |||||
| } | |||||
| if (!ret) { | |||||
| memset(sig64, 0, 64); | |||||
| } | |||||
| memset(nonce32, 0, 32); | |||||
| secp256k1_scalar_clear(&non); | |||||
| secp256k1_scalar_clear(&sec); | |||||
| return ret; | |||||
| } | |||||
| int secp256k1_schnorr_verify(const secp256k1_context* ctx, const unsigned char *sig64, const unsigned char *msg32, const secp256k1_pubkey *pubkey) { | |||||
| secp256k1_ge q; | |||||
| VERIFY_CHECK(ctx != NULL); | |||||
| ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx)); | |||||
| ARG_CHECK(msg32 != NULL); | |||||
| ARG_CHECK(sig64 != NULL); | |||||
| ARG_CHECK(pubkey != NULL); | |||||
| secp256k1_pubkey_load(ctx, &q, pubkey); | |||||
| return secp256k1_schnorr_sig_verify(&ctx->ecmult_ctx, sig64, &q, msg32); | |||||
| } | |||||
| #endif | |||||