From 8bc6aeffa9a191e677cb9e3a22fff130f16990f3 Mon Sep 17 00:00:00 2001 From: Pieter Wuille Date: Mon, 17 Aug 2020 13:48:22 -0700 Subject: [PATCH] Add SHA256 selftest --- Makefile.am | 1 + src/secp256k1.c | 4 ++++ src/selftest.h | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 37 insertions(+) create mode 100644 src/selftest.h diff --git a/Makefile.am b/Makefile.am index a30a84cd599c7..1d9bc7a2c694e 100644 --- a/Makefile.am +++ b/Makefile.am @@ -37,6 +37,7 @@ noinst_HEADERS += src/field_5x52_asm_impl.h noinst_HEADERS += src/util.h noinst_HEADERS += src/scratch.h noinst_HEADERS += src/scratch_impl.h +noinst_HEADERS += src/selftest.h noinst_HEADERS += src/testrand.h noinst_HEADERS += src/testrand_impl.h noinst_HEADERS += src/hash.h diff --git a/src/secp256k1.c b/src/secp256k1.c index 3e7926503825d..4b7e82d260785 100644 --- a/src/secp256k1.c +++ b/src/secp256k1.c @@ -19,6 +19,7 @@ #include "eckey_impl.h" #include "hash_impl.h" #include "scratch_impl.h" +#include "selftest.h" #if defined(VALGRIND) # include @@ -117,6 +118,9 @@ secp256k1_context* secp256k1_context_preallocated_create(void* prealloc, unsigne size_t prealloc_size; secp256k1_context* ret; + if (!secp256k1_selftest()) { + secp256k1_callback_call(&default_error_callback, "self test failed"); + } VERIFY_CHECK(prealloc != NULL); prealloc_size = secp256k1_context_preallocated_size(flags); ret = (secp256k1_context*)manual_alloc(&prealloc, sizeof(secp256k1_context), base, prealloc_size); diff --git a/src/selftest.h b/src/selftest.h new file mode 100644 index 0000000000000..885983aa20999 --- /dev/null +++ b/src/selftest.h @@ -0,0 +1,32 @@ +/********************************************************************** + * Copyright (c) 2020 Pieter Wuille * + * Distributed under the MIT software license, see the accompanying * + * file COPYING or http://www.opensource.org/licenses/mit-license.php.* + **********************************************************************/ + +#ifndef SECP256K1_SELFTEST_H +#define SECP256K1_SELFTEST_H + +#include "hash.h" + +#include + +static int secp256k1_selftest_sha256(void) { + static const char *input63 = "For this sample, this 63-byte string will be used as input data"; + static const unsigned char output32[32] = { + 0xf0, 0x8a, 0x78, 0xcb, 0xba, 0xee, 0x08, 0x2b, 0x05, 0x2a, 0xe0, 0x70, 0x8f, 0x32, 0xfa, 0x1e, + 0x50, 0xc5, 0xc4, 0x21, 0xaa, 0x77, 0x2b, 0xa5, 0xdb, 0xb4, 0x06, 0xa2, 0xea, 0x6b, 0xe3, 0x42, + }; + unsigned char out[32]; + secp256k1_sha256 hasher; + secp256k1_sha256_initialize(&hasher); + secp256k1_sha256_write(&hasher, (const unsigned char*)input63, 63); + secp256k1_sha256_finalize(&hasher, out); + return memcmp(out, output32, 32) == 0; +} + +static int secp256k1_selftest(void) { + return secp256k1_selftest_sha256(); +} + +#endif /* SECP256K1_SELFTEST_H */