crypto/spake2plus/spake2plus_test.cc - boringssl - Git at Google

 // Copyright 2024 The BoringSSL Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include <openssl/base.h>

 #include <string>
 #include <unordered_map>
 #include <utility>
 #include <vector>

 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>

 #include <openssl/bn.h>
 #include <openssl/span.h>

 #include <gtest/gtest.h>

 #include "../internal.h"
 #include "../test/test_util.h"
 #include "./internal.h"


 BSSL_NAMESPACE_BEGIN

 namespace {

 using namespace spake2plus;

 std::vector<uint8_t> HexToBytes(const char *str) {
   std::vector<uint8_t> ret;
   if (!DecodeHex(&ret, str)) {
     abort();
   }
   return ret;
 }

 class RegistrationCache {
  public:
   struct Result {
     std::vector<uint8_t> w0, w1, record;
   };

   const Result &Get(const std::pair<std::string, std::string> &names,
                     const std::string &pw) {
     CacheKey key{names.first, names.second, pw};

     auto it = cache.find(key);
     if (it != cache.end()) {
       return it->second;
     }

     Result output;
     output.w0.resize(kVerifierSize);
     output.w1.resize(kVerifierSize);
     output.record.resize(kRegistrationRecordSize);

     if (!Register(Span(output.w0), Span(output.w1), Span(output.record),
                   StringAsBytes(pw), StringAsBytes(names.first),
                   StringAsBytes(names.second))) {
       abort();
     }

     return cache.emplace(std::move(key), std::move(output)).first->second;
   }

  private:
   struct CacheKey {
     std::string id_prover, id_verifier, password;

     bool operator==(const CacheKey &other) const {
       return std::tie(id_prover, id_verifier, password) ==
              std::tie(other.id_prover, other.id_verifier, other.password);
     }
   };

   struct KeyHash {
     std::size_t operator()(const CacheKey &k) const {
       return std::hash<std::string>()(k.id_prover) ^
              std::hash<std::string>()(k.id_verifier) ^
              std::hash<std::string>()(k.password);
     }
   };

   std::unordered_map<CacheKey, Result, KeyHash> cache;
 };

 RegistrationCache &GlobalRegistrationCache() {
   static RegistrationCache cache;
   return cache;
 }

 struct SPAKEPLUSRun {
   bool Run() {
     const RegistrationCache::Result &registration =
         GlobalRegistrationCache().Get(prover_names, pw);

     Prover prover;
     if (!prover.Init(StringAsBytes(context), StringAsBytes(prover_names.first),
                      StringAsBytes(prover_names.second), registration.w0,
                      registration.w1)) {
       return false;
     }

     std::vector<uint8_t> verifier_registration_record = registration.record;
     if (verifier_corrupt_record) {
       verifier_registration_record[verifier_registration_record.size() - 1] ^=
           0xFF;
     }

     Verifier verifier;
     if (!verifier.Init(StringAsBytes(context),
                        StringAsBytes(verifier_names.first),
                        StringAsBytes(verifier_names.second), registration.w0,
                        verifier_registration_record)) {
       return false;
     }

     uint8_t prover_share[kShareSize];
     if (!prover.GenerateShare(prover_share)) {
       return false;
     }

     if (repeat_invocations && prover.GenerateShare(prover_share)) {
       return false;
     }

     if (prover_corrupt_msg_bit &&
         *prover_corrupt_msg_bit < 8 * sizeof(prover_share)) {
       prover_share[*prover_corrupt_msg_bit / 8] ^=
           1 << (*prover_corrupt_msg_bit & 7);
     }

     uint8_t verifier_share[kShareSize];
     uint8_t verifier_confirm[kConfirmSize];
     uint8_t verifier_secret[kSecretSize];
     if (!verifier.ProcessProverShare(verifier_share, verifier_confirm,
                                      verifier_secret, prover_share)) {
       return false;
     }

     if (repeat_invocations &&
         verifier.ProcessProverShare(verifier_share, verifier_confirm,
                                     verifier_secret, prover_share)) {
       return false;
     }

     uint8_t prover_confirm[kConfirmSize];
     uint8_t prover_secret[kSecretSize];
     if (!prover.ComputeConfirmation(prover_confirm, prover_secret,
                                     verifier_share, verifier_confirm)) {
       return false;
     }

     if (repeat_invocations &&  //
         prover.ComputeConfirmation(prover_confirm, prover_secret,
                                    verifier_share, verifier_confirm)) {
       return false;
     }

     if (prover_corrupt_confirm_bit &&
         *prover_corrupt_confirm_bit < 8 * sizeof(prover_confirm)) {
       prover_confirm[*prover_corrupt_confirm_bit / 8] ^=
           1 << (*prover_corrupt_confirm_bit & 7);
     }

     if (!verifier.VerifyProverConfirmation(prover_confirm)) {
       return false;
     }

     if (repeat_invocations &&
         verifier.VerifyProverConfirmation(prover_confirm)) {
       return false;
     }

     key_matches_ = Span(prover_secret) == Span(verifier_secret);
     return true;
   }

   bool key_matches() const { return key_matches_; }

   std::string context =
       "SPAKE2+-P256-SHA256-HKDF-SHA256-HMAC-SHA256 Test Vectors";
   std::string pw = "password";
   std::pair<std::string, std::string> prover_names = {"client", "server"};
   std::pair<std::string, std::string> verifier_names = {"client", "server"};
   bool verifier_corrupt_record = false;
   bool repeat_invocations = false;
   std::optional<size_t> prover_corrupt_msg_bit;
   std::optional<size_t> prover_corrupt_confirm_bit;

  private:
   bool key_matches_ = false;
 };

 TEST(SPAKEPLUSTest, TestVectors) {
   // https://datatracker.ietf.org/doc/html/rfc9383#appendix-C
   // SPAKE2+-P256-SHA256-HKDF-SHA256-HMAC-SHA256 Test Vectors
   const char w0_str[] =
       "bb8e1bbcf3c48f62c08db243652ae55d3e5586053fca77102994f23ad95491b3";
   const char w1_str[] =
       "7e945f34d78785b8a3ef44d0df5a1a97d6b3b460409a345ca7830387a74b1dba";
   const char L_str[] =
       "04eb7c9db3d9a9eb1f8adab81b5794c1f13ae3e225efbe91ea487425854c7fc00f00bfed"
       "cbd09b2400142d40a14f2064ef31dfaa903b91d1faea7093d835966efd";
   const char x_str[] =
       "d1232c8e8693d02368976c174e2088851b8365d0d79a9eee709c6a05a2fad539";
   const char share_p_str[] =
       "04ef3bd051bf78a2234ec0df197f7828060fe9856503579bb1733009042c15c0c1de1277"
       "27f418b5966afadfdd95a6e4591d171056b333dab97a79c7193e341727";
   const char y_str[] =
       "717a72348a182085109c8d3917d6c43d59b224dc6a7fc4f0483232fa6516d8b3";
   const char share_v_str[] =
       "04c0f65da0d11927bdf5d560c69e1d7d939a05b0e88291887d679fcadea75810fb5cc1ca"
       "7494db39e82ff2f50665255d76173e09986ab46742c798a9a68437b048";
   const char confirm_p_str[] =
       "926cc713504b9b4d76c9162ded04b5493e89109f6d89462cd33adc46fda27527";
   const char confirm_v_str[] =
       "9747bcc4f8fe9f63defee53ac9b07876d907d55047e6ff2def2e7529089d3e68";
   const char secret_str[] =
       "0c5f8ccd1413423a54f6c1fb26ff01534a87f893779c6e68666d772bfd91f3e7";
   const std::string context =
       "SPAKE2+-P256-SHA256-HKDF-SHA256-HMAC-SHA256 Test Vectors";
   const std::pair<std::string, std::string> prover_names = {"client", "server"};
   const std::pair<std::string, std::string> verifier_names = {"client",
                                                               "server"};

   std::vector<uint8_t> w0 = HexToBytes(w0_str);
   std::vector<uint8_t> w1 = HexToBytes(w1_str);
   std::vector<uint8_t> registration_record = HexToBytes(L_str);
   std::vector<uint8_t> x = HexToBytes(x_str);
   std::vector<uint8_t> y = HexToBytes(y_str);

   Prover prover;
   ASSERT_TRUE(prover.Init(StringAsBytes(context),
                           StringAsBytes(prover_names.first),
                           StringAsBytes(prover_names.second), MakeConstSpan(w0),
                           MakeConstSpan(w1), x));

   Verifier verifier;
   ASSERT_TRUE(
       verifier.Init(StringAsBytes(context), StringAsBytes(prover_names.first),
                     StringAsBytes(prover_names.second), MakeConstSpan(w0),
                     MakeConstSpan(registration_record), y));

   uint8_t prover_share[kShareSize];
   ASSERT_TRUE(prover.GenerateShare(prover_share));

   std::vector<uint8_t> share_p = HexToBytes(share_p_str);
   ASSERT_TRUE(
       OPENSSL_memcmp(share_p.data(), prover_share, sizeof(prover_share)) == 0);

   uint8_t verifier_share[kShareSize];
   uint8_t verifier_confirm[kConfirmSize];
   uint8_t verifier_secret[kSecretSize];
   ASSERT_TRUE(verifier.ProcessProverShare(verifier_share, verifier_confirm,
                                           verifier_secret, prover_share));

   std::vector<uint8_t> share_v = HexToBytes(share_v_str);
   ASSERT_TRUE(OPENSSL_memcmp(share_v.data(), verifier_share,
                              sizeof(verifier_share)) == 0);
   std::vector<uint8_t> confirm_v = HexToBytes(confirm_v_str);
   ASSERT_TRUE(OPENSSL_memcmp(confirm_v.data(), verifier_confirm,
                              sizeof(verifier_confirm)) == 0);

   uint8_t prover_confirm[kConfirmSize];
   uint8_t prover_secret[kSecretSize];
   ASSERT_TRUE(prover.ComputeConfirmation(prover_confirm, prover_secret,
                                          verifier_share, verifier_confirm));

   std::vector<uint8_t> confirm_p = HexToBytes(confirm_p_str);
   ASSERT_TRUE(OPENSSL_memcmp(confirm_p.data(), prover_confirm,
                              sizeof(prover_confirm)) == 0);

   ASSERT_TRUE(verifier.VerifyProverConfirmation(prover_confirm));

   std::vector<uint8_t> expected_secret = HexToBytes(secret_str);
   static_assert(sizeof(verifier_secret) == sizeof(prover_secret));
   ASSERT_TRUE(OPENSSL_memcmp(prover_secret, verifier_secret,
                              sizeof(prover_secret)) == 0);
   ASSERT_TRUE(OPENSSL_memcmp(expected_secret.data(), verifier_secret,
                              sizeof(verifier_secret)) == 0);
 }

 TEST(SPAKEPLUSTest, SPAKEPLUS) {
   for (unsigned i = 0; i < 20; i++) {
     SPAKEPLUSRun spake2;
     ASSERT_TRUE(spake2.Run());
     EXPECT_TRUE(spake2.key_matches());
   }
 }

 TEST(SPAKEPLUSTest, WrongPassword) {
   SPAKEPLUSRun spake2;
   spake2.verifier_corrupt_record = true;
   ASSERT_FALSE(spake2.Run());
 }

 TEST(SPAKEPLUSTest, WrongNames) {
   SPAKEPLUSRun spake2;
   spake2.prover_names.second = "alice";
   spake2.verifier_names.second = "bob";
   ASSERT_FALSE(spake2.Run());
 }

 TEST(SPAKEPLUSTest, CorruptMessages) {
   for (size_t i = 0; i < 8 * kShareSize; i++) {
     SPAKEPLUSRun spake2;
     spake2.prover_corrupt_msg_bit = i;
     EXPECT_FALSE(spake2.Run())
         << "Passed after corrupting Prover's key share message, bit " << i;
   }

   for (size_t i = 0; i < 8 * kConfirmSize; i++) {
     SPAKEPLUSRun spake2;
     spake2.prover_corrupt_confirm_bit = i;
     EXPECT_FALSE(spake2.Run())
         << "Passed after corrupting Verifier's confirmation message, bit " << i;
   }
 }

 TEST(SPAKEPLUSTest, StateMachine) {
   SPAKEPLUSRun spake2;
   spake2.repeat_invocations = true;
   ASSERT_TRUE(spake2.Run());
 }

 }  // namespace

 BSSL_NAMESPACE_END
	// Copyright 2024 The BoringSSL Authors
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// https://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include <openssl/base.h>

	#include <string>
	#include <unordered_map>
	#include <utility>
	#include <vector>

	#include <stdint.h>
	#include <stdio.h>
	#include <string.h>

	#include <openssl/bn.h>
	#include <openssl/span.h>

	#include <gtest/gtest.h>

	#include "../internal.h"
	#include "../test/test_util.h"
	#include "./internal.h"


	BSSL_NAMESPACE_BEGIN

	namespace {

	using namespace spake2plus;

	std::vector<uint8_t> HexToBytes(const char *str) {
	std::vector<uint8_t> ret;
	if (!DecodeHex(&ret, str)) {
	abort();
	}
	return ret;
	}

	class RegistrationCache {
	public:
	struct Result {
	std::vector<uint8_t> w0, w1, record;
	};

	const Result &Get(const std::pair<std::string, std::string> &names,
	const std::string &pw) {
	CacheKey key{names.first, names.second, pw};

	auto it = cache.find(key);
	if (it != cache.end()) {
	return it->second;
	}

	Result output;
	output.w0.resize(kVerifierSize);
	output.w1.resize(kVerifierSize);
	output.record.resize(kRegistrationRecordSize);

	if (!Register(Span(output.w0), Span(output.w1), Span(output.record),
	StringAsBytes(pw), StringAsBytes(names.first),
	StringAsBytes(names.second))) {
	abort();
	}

	return cache.emplace(std::move(key), std::move(output)).first->second;
	}

	private:
	struct CacheKey {
	std::string id_prover, id_verifier, password;

	bool operator==(const CacheKey &other) const {
	return std::tie(id_prover, id_verifier, password) ==
	std::tie(other.id_prover, other.id_verifier, other.password);
	}
	};

	struct KeyHash {
	std::size_t operator()(const CacheKey &k) const {
	return std::hash<std::string>()(k.id_prover) ^
	std::hash<std::string>()(k.id_verifier) ^
	std::hash<std::string>()(k.password);
	}
	};

	std::unordered_map<CacheKey, Result, KeyHash> cache;
	};

	RegistrationCache &GlobalRegistrationCache() {
	static RegistrationCache cache;
	return cache;
	}

	struct SPAKEPLUSRun {
	bool Run() {
	const RegistrationCache::Result &registration =
	GlobalRegistrationCache().Get(prover_names, pw);

	Prover prover;
	if (!prover.Init(StringAsBytes(context), StringAsBytes(prover_names.first),
	StringAsBytes(prover_names.second), registration.w0,
	registration.w1)) {
	return false;
	}

	std::vector<uint8_t> verifier_registration_record = registration.record;
	if (verifier_corrupt_record) {
	verifier_registration_record[verifier_registration_record.size() - 1] ^=
	0xFF;
	}

	Verifier verifier;
	if (!verifier.Init(StringAsBytes(context),
	StringAsBytes(verifier_names.first),
	StringAsBytes(verifier_names.second), registration.w0,
	verifier_registration_record)) {
	return false;
	}

	uint8_t prover_share[kShareSize];
	if (!prover.GenerateShare(prover_share)) {
	return false;
	}

	if (repeat_invocations && prover.GenerateShare(prover_share)) {
	return false;
	}

	if (prover_corrupt_msg_bit &&
	prover_corrupt_msg_bit < 8 sizeof(prover_share)) {
	prover_share[*prover_corrupt_msg_bit / 8] ^=
	1 << (*prover_corrupt_msg_bit & 7);
	}

	uint8_t verifier_share[kShareSize];
	uint8_t verifier_confirm[kConfirmSize];
	uint8_t verifier_secret[kSecretSize];
	if (!verifier.ProcessProverShare(verifier_share, verifier_confirm,
	verifier_secret, prover_share)) {
	return false;
	}

	if (repeat_invocations &&
	verifier.ProcessProverShare(verifier_share, verifier_confirm,
	verifier_secret, prover_share)) {
	return false;
	}

	uint8_t prover_confirm[kConfirmSize];
	uint8_t prover_secret[kSecretSize];
	if (!prover.ComputeConfirmation(prover_confirm, prover_secret,
	verifier_share, verifier_confirm)) {
	return false;
	}

	if (repeat_invocations && //
	prover.ComputeConfirmation(prover_confirm, prover_secret,
	verifier_share, verifier_confirm)) {
	return false;
	}

	if (prover_corrupt_confirm_bit &&
	prover_corrupt_confirm_bit < 8 sizeof(prover_confirm)) {
	prover_confirm[*prover_corrupt_confirm_bit / 8] ^=
	1 << (*prover_corrupt_confirm_bit & 7);
	}

	if (!verifier.VerifyProverConfirmation(prover_confirm)) {
	return false;
	}

	if (repeat_invocations &&
	verifier.VerifyProverConfirmation(prover_confirm)) {
	return false;
	}

	key_matches_ = Span(prover_secret) == Span(verifier_secret);
	return true;
	}

	bool key_matches() const { return key_matches_; }

	std::string context =
	"SPAKE2+-P256-SHA256-HKDF-SHA256-HMAC-SHA256 Test Vectors";
	std::string pw = "password";
	std::pair<std::string, std::string> prover_names = {"client", "server"};
	std::pair<std::string, std::string> verifier_names = {"client", "server"};
	bool verifier_corrupt_record = false;
	bool repeat_invocations = false;
	std::optional<size_t> prover_corrupt_msg_bit;
	std::optional<size_t> prover_corrupt_confirm_bit;

	private:
	bool key_matches_ = false;
	};

	TEST(SPAKEPLUSTest, TestVectors) {
	// https://datatracker.ietf.org/doc/html/rfc9383#appendix-C
	// SPAKE2+-P256-SHA256-HKDF-SHA256-HMAC-SHA256 Test Vectors
	const char w0_str[] =
	"bb8e1bbcf3c48f62c08db243652ae55d3e5586053fca77102994f23ad95491b3";
	const char w1_str[] =
	"7e945f34d78785b8a3ef44d0df5a1a97d6b3b460409a345ca7830387a74b1dba";
	const char L_str[] =
	"04eb7c9db3d9a9eb1f8adab81b5794c1f13ae3e225efbe91ea487425854c7fc00f00bfed"
	"cbd09b2400142d40a14f2064ef31dfaa903b91d1faea7093d835966efd";
	const char x_str[] =
	"d1232c8e8693d02368976c174e2088851b8365d0d79a9eee709c6a05a2fad539";
	const char share_p_str[] =
	"04ef3bd051bf78a2234ec0df197f7828060fe9856503579bb1733009042c15c0c1de1277"
	"27f418b5966afadfdd95a6e4591d171056b333dab97a79c7193e341727";
	const char y_str[] =
	"717a72348a182085109c8d3917d6c43d59b224dc6a7fc4f0483232fa6516d8b3";
	const char share_v_str[] =
	"04c0f65da0d11927bdf5d560c69e1d7d939a05b0e88291887d679fcadea75810fb5cc1ca"
	"7494db39e82ff2f50665255d76173e09986ab46742c798a9a68437b048";
	const char confirm_p_str[] =
	"926cc713504b9b4d76c9162ded04b5493e89109f6d89462cd33adc46fda27527";
	const char confirm_v_str[] =
	"9747bcc4f8fe9f63defee53ac9b07876d907d55047e6ff2def2e7529089d3e68";
	const char secret_str[] =
	"0c5f8ccd1413423a54f6c1fb26ff01534a87f893779c6e68666d772bfd91f3e7";
	const std::string context =
	"SPAKE2+-P256-SHA256-HKDF-SHA256-HMAC-SHA256 Test Vectors";
	const std::pair<std::string, std::string> prover_names = {"client", "server"};
	const std::pair<std::string, std::string> verifier_names = {"client",
	"server"};

	std::vector<uint8_t> w0 = HexToBytes(w0_str);
	std::vector<uint8_t> w1 = HexToBytes(w1_str);
	std::vector<uint8_t> registration_record = HexToBytes(L_str);
	std::vector<uint8_t> x = HexToBytes(x_str);
	std::vector<uint8_t> y = HexToBytes(y_str);

	Prover prover;
	ASSERT_TRUE(prover.Init(StringAsBytes(context),
	StringAsBytes(prover_names.first),
	StringAsBytes(prover_names.second), MakeConstSpan(w0),
	MakeConstSpan(w1), x));

	Verifier verifier;
	ASSERT_TRUE(
	verifier.Init(StringAsBytes(context), StringAsBytes(prover_names.first),
	StringAsBytes(prover_names.second), MakeConstSpan(w0),
	MakeConstSpan(registration_record), y));

	uint8_t prover_share[kShareSize];
	ASSERT_TRUE(prover.GenerateShare(prover_share));

	std::vector<uint8_t> share_p = HexToBytes(share_p_str);
	ASSERT_TRUE(
	OPENSSL_memcmp(share_p.data(), prover_share, sizeof(prover_share)) == 0);

	uint8_t verifier_share[kShareSize];
	uint8_t verifier_confirm[kConfirmSize];
	uint8_t verifier_secret[kSecretSize];
	ASSERT_TRUE(verifier.ProcessProverShare(verifier_share, verifier_confirm,
	verifier_secret, prover_share));

	std::vector<uint8_t> share_v = HexToBytes(share_v_str);
	ASSERT_TRUE(OPENSSL_memcmp(share_v.data(), verifier_share,
	sizeof(verifier_share)) == 0);
	std::vector<uint8_t> confirm_v = HexToBytes(confirm_v_str);
	ASSERT_TRUE(OPENSSL_memcmp(confirm_v.data(), verifier_confirm,
	sizeof(verifier_confirm)) == 0);

	uint8_t prover_confirm[kConfirmSize];
	uint8_t prover_secret[kSecretSize];
	ASSERT_TRUE(prover.ComputeConfirmation(prover_confirm, prover_secret,
	verifier_share, verifier_confirm));

	std::vector<uint8_t> confirm_p = HexToBytes(confirm_p_str);
	ASSERT_TRUE(OPENSSL_memcmp(confirm_p.data(), prover_confirm,
	sizeof(prover_confirm)) == 0);

	ASSERT_TRUE(verifier.VerifyProverConfirmation(prover_confirm));

	std::vector<uint8_t> expected_secret = HexToBytes(secret_str);
	static_assert(sizeof(verifier_secret) == sizeof(prover_secret));
	ASSERT_TRUE(OPENSSL_memcmp(prover_secret, verifier_secret,
	sizeof(prover_secret)) == 0);
	ASSERT_TRUE(OPENSSL_memcmp(expected_secret.data(), verifier_secret,
	sizeof(verifier_secret)) == 0);
	}

	TEST(SPAKEPLUSTest, SPAKEPLUS) {
	for (unsigned i = 0; i < 20; i++) {
	SPAKEPLUSRun spake2;
	ASSERT_TRUE(spake2.Run());
	EXPECT_TRUE(spake2.key_matches());
	}
	}

	TEST(SPAKEPLUSTest, WrongPassword) {
	SPAKEPLUSRun spake2;
	spake2.verifier_corrupt_record = true;
	ASSERT_FALSE(spake2.Run());
	}

	TEST(SPAKEPLUSTest, WrongNames) {
	SPAKEPLUSRun spake2;
	spake2.prover_names.second = "alice";
	spake2.verifier_names.second = "bob";
	ASSERT_FALSE(spake2.Run());
	}

	TEST(SPAKEPLUSTest, CorruptMessages) {
	for (size_t i = 0; i < 8 * kShareSize; i++) {
	SPAKEPLUSRun spake2;
	spake2.prover_corrupt_msg_bit = i;
	EXPECT_FALSE(spake2.Run())
	<< "Passed after corrupting Prover's key share message, bit " << i;
	}

	for (size_t i = 0; i < 8 * kConfirmSize; i++) {
	SPAKEPLUSRun spake2;
	spake2.prover_corrupt_confirm_bit = i;
	EXPECT_FALSE(spake2.Run())
	<< "Passed after corrupting Verifier's confirmation message, bit " << i;
	}
	}

	TEST(SPAKEPLUSTest, StateMachine) {
	SPAKEPLUSRun spake2;
	spake2.repeat_invocations = true;
	ASSERT_TRUE(spake2.Run());
	}

	} // namespace

	BSSL_NAMESPACE_END