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- /* Copyright (c) 2016, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #include <stdio.h>
-
- #include <vector>
-
- #include <openssl/bn.h>
- #include <openssl/crypto.h>
- #include <openssl/ec.h>
- #include <openssl/ec_key.h>
- #include <openssl/ecdh.h>
- #include <openssl/nid.h>
-
- #include "../test/file_test.h"
-
-
- static bssl::UniquePtr<EC_GROUP> GetCurve(FileTest *t, const char *key) {
- std::string curve_name;
- if (!t->GetAttribute(&curve_name, key)) {
- return nullptr;
- }
-
- if (curve_name == "P-224") {
- return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(NID_secp224r1));
- }
- if (curve_name == "P-256") {
- return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(
- NID_X9_62_prime256v1));
- }
- if (curve_name == "P-384") {
- return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(NID_secp384r1));
- }
- if (curve_name == "P-521") {
- return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(NID_secp521r1));
- }
-
- t->PrintLine("Unknown curve '%s'", curve_name.c_str());
- return nullptr;
- }
-
- static bssl::UniquePtr<BIGNUM> GetBIGNUM(FileTest *t, const char *key) {
- std::vector<uint8_t> bytes;
- if (!t->GetBytes(&bytes, key)) {
- return nullptr;
- }
-
- return bssl::UniquePtr<BIGNUM>(BN_bin2bn(bytes.data(), bytes.size(), nullptr));
- }
-
- static bool TestECDH(FileTest *t, void *arg) {
- bssl::UniquePtr<EC_GROUP> group = GetCurve(t, "Curve");
- bssl::UniquePtr<BIGNUM> priv_key = GetBIGNUM(t, "Private");
- bssl::UniquePtr<BIGNUM> x = GetBIGNUM(t, "X");
- bssl::UniquePtr<BIGNUM> y = GetBIGNUM(t, "Y");
- bssl::UniquePtr<BIGNUM> peer_x = GetBIGNUM(t, "PeerX");
- bssl::UniquePtr<BIGNUM> peer_y = GetBIGNUM(t, "PeerY");
- std::vector<uint8_t> z;
- if (!group || !priv_key || !x || !y || !peer_x || !peer_y ||
- !t->GetBytes(&z, "Z")) {
- return false;
- }
-
- bssl::UniquePtr<EC_KEY> key(EC_KEY_new());
- bssl::UniquePtr<EC_POINT> pub_key(EC_POINT_new(group.get()));
- bssl::UniquePtr<EC_POINT> peer_pub_key(EC_POINT_new(group.get()));
- if (!key || !pub_key || !peer_pub_key ||
- !EC_KEY_set_group(key.get(), group.get()) ||
- !EC_KEY_set_private_key(key.get(), priv_key.get()) ||
- !EC_POINT_set_affine_coordinates_GFp(group.get(), pub_key.get(), x.get(),
- y.get(), nullptr) ||
- !EC_POINT_set_affine_coordinates_GFp(group.get(), peer_pub_key.get(),
- peer_x.get(), peer_y.get(),
- nullptr) ||
- !EC_KEY_set_public_key(key.get(), pub_key.get()) ||
- !EC_KEY_check_key(key.get())) {
- return false;
- }
-
- std::vector<uint8_t> actual_z;
- // Make |actual_z| larger than expected to ensure |ECDH_compute_key| returns
- // the right amount of data.
- actual_z.resize(z.size() + 1);
- int ret = ECDH_compute_key(actual_z.data(), actual_z.size(),
- peer_pub_key.get(), key.get(), nullptr);
- if (ret < 0 ||
- !t->ExpectBytesEqual(z.data(), z.size(), actual_z.data(),
- static_cast<size_t>(ret))) {
- return false;
- }
-
- // Test |ECDH_compute_key| truncates.
- actual_z.resize(z.size() - 1);
- ret = ECDH_compute_key(actual_z.data(), actual_z.size(), peer_pub_key.get(),
- key.get(), nullptr);
- if (ret < 0 ||
- !t->ExpectBytesEqual(z.data(), z.size() - 1, actual_z.data(),
- static_cast<size_t>(ret))) {
- return false;
- }
-
- return true;
- }
-
- int main(int argc, char *argv[]) {
- CRYPTO_library_init();
-
- if (argc != 2) {
- fprintf(stderr, "%s <test file.txt>\n", argv[0]);
- return 1;
- }
-
- return FileTestMain(TestECDH, nullptr, argv[1]);
- }
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