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gnutls.16450
0002-Add-test-to-ensure-ECDH-exchange-behaves-c...
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File 0002-Add-test-to-ensure-ECDH-exchange-behaves-correctly.patch of Package gnutls.16450
From d0f8c4421a400feea96ba18f564b34ee594a7b85 Mon Sep 17 00:00:00 2001 From: Simo Sorce <simo@redhat.com> Date: Tue, 14 May 2019 18:38:33 -0400 Subject: [PATCH 2/6] Add test to ensure ECDH exchange behaves correctly This test ensures that public keys are properly tested for validity before a ECDH exchange is computed. Signed-off-by: Simo Sorce <simo@redhat.com> --- tests/Makefile.am | 2 +- tests/ecdh-compute.c | 209 +++++++++++++++++++++++++++++++ tests/suite/tls-fuzzer/tlsfuzzer | 2 +- 3 files changed, 211 insertions(+), 2 deletions(-) create mode 100644 tests/ecdh-compute.c Index: gnutls-3.6.7/tests/ecdh-compute.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gnutls-3.6.7/tests/ecdh-compute.c 2020-09-03 15:17:46.222875560 +0200 @@ -0,0 +1,209 @@ +/* + * Copyright (C) 2019 Red Hat, Inc. + * + * Author: Simo Sorce + * + * This file is part of GnuTLS. + * + * GnuTLS is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * GnuTLS is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GnuTLS; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +/* This program tests functionality of DH exchanges */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <gnutls/gnutls.h> +#include <stdbool.h> +#include <string.h> +#include <stdlib.h> +#include "utils.h" + +#ifdef ENABLE_FIPS140 +int _gnutls_ecdh_compute_key(gnutls_ecc_curve_t curve, + const gnutls_datum_t *x, const gnutls_datum_t *y, + const gnutls_datum_t *k, + const gnutls_datum_t *peer_x, const gnutls_datum_t *peer_y, + gnutls_datum_t *Z); + +int _gnutls_ecdh_generate_key(gnutls_ecc_curve_t curve, + gnutls_datum_t *x, gnutls_datum_t *y, + gnutls_datum_t *k); + +static void genkey(gnutls_ecc_curve_t curve, gnutls_datum_t *x, + gnutls_datum_t *y, gnutls_datum_t *key) +{ + int ret; + + ret = _gnutls_ecdh_generate_key(curve, x, y, key); + if (ret != 0) + fail("error\n"); +} + +static void compute_key(gnutls_ecc_curve_t curve, gnutls_datum_t *x, + gnutls_datum_t *y, gnutls_datum_t *key, + const gnutls_datum_t *peer_x, + const gnutls_datum_t *peer_y, + int expect_error, + gnutls_datum_t *result, bool expect_success) +{ + gnutls_datum_t Z = { 0 }; + bool success; + int ret; + + ret = _gnutls_ecdh_compute_key(curve, x, y, key, peer_x, peer_y, &Z); + if (expect_error != ret) + fail("error (%d)\n", ret); + + if (result) { + success = (Z.size != result->size && + memcmp(Z.data, result->data, Z.size)); + if (success != expect_success) + fail("error\n"); + } + gnutls_free(Z.data); +} + +struct dh_test_data { + gnutls_ecc_curve_t curve; + const gnutls_datum_t x; + const gnutls_datum_t y; + const gnutls_datum_t key; + const gnutls_datum_t peer_x; + const gnutls_datum_t peer_y; + int expected_error; +}; + +void doit(void) +{ + struct dh_test_data test_data[] = { + { + /* x == 0, y == 0 */ + GNUTLS_ECC_CURVE_SECP256R1, + { 0 }, { 0 }, { 0 }, + { (void *)"\x00", 1 }, + { (void *)"\x00", 1 }, + /* Should be GNUTLS_E_PK_INVALID_PUBKEY but mpi scan + * balks on values of 0 */ + GNUTLS_E_MPI_SCAN_FAILED, + }, + { + /* x > p -1 */ + GNUTLS_ECC_CURVE_SECP256R1, + { 0 }, { 0 }, { 0 }, + { (void *)"\xff\xff\xff\xff\x00\x00\x00\x01" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\xff\xff\xff\xff" + "\xff\xff\xff\xff\xff\xff\xff\xff", 1 }, + { (void *)"\x02", 1 }, + GNUTLS_E_PK_INVALID_PUBKEY, + }, + { + /* y > p -1 */ + GNUTLS_ECC_CURVE_SECP256R1, + { 0 }, { 0 }, { 0 }, + { (void *)"\x02", 1 }, + { (void *)"\xff\xff\xff\xff\x00\x00\x00\x01" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\xff\xff\xff\xff" + "\xff\xff\xff\xff\xff\xff\xff\xff", 1 }, + GNUTLS_E_PK_INVALID_PUBKEY, + }, + { + /* From CAVS tests */ + GNUTLS_ECC_CURVE_SECP521R1, + { (void *)"\xac\xbe\x4a\xd4\xf6\x73\x44\x0a" + "\xfc\x31\xf0\xb0\x3d\x28\xd4\xd5" + "\x14\xbe\x7b\xdd\x7a\x31\xb0\x32" + "\xec\x27\x27\x17\xa5\x7d\xc2\x6c" + "\xc4\xc9\x56\x29\xdb\x2d\x8c\x05" + "\x86\x2b\xe6\x15\xc6\x06\x28\xa3" + "\x24\xf2\x01\x7f\x98\xbd\xf9\x11" + "\xcc\xf8\x83\x5e\x43\x9e\xb2\xc1" + "\x88", 65 }, + { (void *)"\xd6\x9b\x29\xa2\x37\x82\x36\x92" + "\xe8\xdb\x90\xa3\x25\x68\x67\x6c" + "\x92\xff\x3d\x23\x85\xe2\xfd\x13" + "\x16\x12\x72\xb3\x4b\x55\x88\x72" + "\xb0\x35\xab\xb5\x10\x89\x52\x5f" + "\x42\x9f\x53\x02\x60\x80\xc3\xd5" + "\x36\x6e\xe9\xdd\x28\xae\xd2\x38" + "\xab\xbe\x68\x6a\x54\x3e\x19\xf2" + "\x77", 65 }, + { (void *)"\xd7\xdd\x17\x7c\xb9\x7f\x19\x09" + "\xbe\x56\x79\xba\x38\x7b\xee\x64" + "\xf7\xb4\x08\x4a\x4f\xaa\x6c\x31" + "\x8b\x82\xe9\xf2\xf7\x50\xc5\xc1" + "\x82\x26\x20\xd4\x88\x25\x0b\xf6" + "\xb4\x14\xea\x9b\x2c\x07\x93\x50" + "\xb9\xad\x78\x0a\x5e\xc6\xa6\xf8" + "\xb2\x9f\xa1\xc4\x76\xce\x1d\xa9" + "\xf5", 65 }, + { (void *)"\x01\x41\xbe\x1a\xfa\x21\x99\xc9" + "\xb2\x2d\xaa\x0a\xff\x90\xb2\x67" + "\x18\xa2\x67\x04\x7e\xae\x28\x40" + "\xe8\xbc\xa0\xbd\x0c\x75\x41\x51" + "\xf1\xa0\x4d\xcf\x09\xa5\x4f\x1e" + "\x13\x5e\xa0\xdd\x13\xed\x86\x74" + "\x05\xc0\xcb\x6d\xac\x14\x6a\x24" + "\xb8\xdc\xf3\x78\xed\xed\x5d\xcd" + "\x57\x5b", 66 }, + { (void *)"\x19\x52\xbd\x5d\xe6\x26\x40\xc3" + "\xfc\x8c\xc1\x55\xe2\x9c\x71\x14" + "\x5e\xdc\x62\x1c\x3a\x94\x4e\x55" + "\x56\x75\xf7\x45\x6e\xa4\x9e\x94" + "\xb8\xfe\xda\xd4\xac\x7d\x76\xc5" + "\xb4\x65\xed\xb4\x49\x34\x71\x14" + "\xdb\x8f\x10\x90\xa3\x05\x02\xdc" + "\x86\x92\x6c\xbe\x9b\x57\x32\xe3" + "\x2c", 65 }, + 0, + }, + { 0 } + }; + + for (int i = 0; test_data[i].curve != 0; i++) { + gnutls_datum_t x, y, key; + + if (test_data[i].key.data == NULL) { + genkey(test_data[i].curve, &x, &y, &key); + } else { + x = test_data[i].x; + y = test_data[i].y; + key = test_data[i].key; + } + + compute_key(test_data[i].curve, &x, &y, &key, + &test_data[i].peer_x, + &test_data[i].peer_y, + test_data[i].expected_error, + NULL, 0); + + if (test_data[i].key.data == NULL) { + gnutls_free(x.data); + gnutls_free(y.data); + gnutls_free(key.data); + } + } + + success("all ok\n"); +} +#else +void doit(void) +{ + return; +} +#endif
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