| /* Copyright (c) 2020, 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 <string.h> |
| #include <time.h> |
| |
| #include <algorithm> |
| #include <limits> |
| #include <string> |
| #include <tuple> |
| #include <utility> |
| #include <vector> |
| |
| #include <gtest/gtest.h> |
| |
| #include <openssl/bytestring.h> |
| #include <openssl/curve25519.h> |
| #include <openssl/evp.h> |
| #include <openssl/mem.h> |
| #include <openssl/rand.h> |
| #include <openssl/sha.h> |
| #include <openssl/trust_token.h> |
| |
| #include "../ec_extra/internal.h" |
| #include "../fipsmodule/ec/internal.h" |
| #include "../internal.h" |
| #include "../test/test_util.h" |
| #include "internal.h" |
| |
| |
| BSSL_NAMESPACE_BEGIN |
| |
| namespace { |
| |
| TEST(TrustTokenTest, KeyGenExp1) { |
| uint8_t priv_key[TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE]; |
| uint8_t pub_key[TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE]; |
| size_t priv_key_len, pub_key_len; |
| ASSERT_TRUE(TRUST_TOKEN_generate_key( |
| TRUST_TOKEN_experiment_v1(), priv_key, &priv_key_len, |
| TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE, pub_key, &pub_key_len, |
| TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE, 0x0001)); |
| ASSERT_EQ(292u, priv_key_len); |
| ASSERT_EQ(301u, pub_key_len); |
| } |
| |
| TEST(TrustTokenTest, KeyGenExp2VOPRF) { |
| uint8_t priv_key[TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE]; |
| uint8_t pub_key[TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE]; |
| size_t priv_key_len, pub_key_len; |
| ASSERT_TRUE(TRUST_TOKEN_generate_key( |
| TRUST_TOKEN_experiment_v2_voprf(), priv_key, &priv_key_len, |
| TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE, pub_key, &pub_key_len, |
| TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE, 0x0001)); |
| ASSERT_EQ(52u, priv_key_len); |
| ASSERT_EQ(101u, pub_key_len); |
| } |
| |
| TEST(TrustTokenTest, KeyGenExp2PMB) { |
| uint8_t priv_key[TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE]; |
| uint8_t pub_key[TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE]; |
| size_t priv_key_len, pub_key_len; |
| ASSERT_TRUE(TRUST_TOKEN_generate_key( |
| TRUST_TOKEN_experiment_v2_pmb(), priv_key, &priv_key_len, |
| TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE, pub_key, &pub_key_len, |
| TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE, 0x0001)); |
| ASSERT_EQ(292u, priv_key_len); |
| ASSERT_EQ(295u, pub_key_len); |
| } |
| |
| // Test that H in |TRUST_TOKEN_experiment_v1| was computed correctly. |
| TEST(TrustTokenTest, HExp1) { |
| const EC_GROUP *group = EC_GROUP_new_by_curve_name(NID_secp384r1); |
| ASSERT_TRUE(group); |
| |
| const uint8_t kHGen[] = "generator"; |
| const uint8_t kHLabel[] = "PMBTokens Experiment V1 HashH"; |
| |
| bssl::UniquePtr<EC_POINT> expected_h(EC_POINT_new(group)); |
| ASSERT_TRUE(expected_h); |
| ASSERT_TRUE(ec_hash_to_curve_p384_xmd_sha512_sswu_draft07( |
| group, &expected_h->raw, kHLabel, sizeof(kHLabel), kHGen, sizeof(kHGen))); |
| uint8_t expected_bytes[1 + 2 * EC_MAX_BYTES]; |
| size_t expected_len = |
| EC_POINT_point2oct(group, expected_h.get(), POINT_CONVERSION_UNCOMPRESSED, |
| expected_bytes, sizeof(expected_bytes), nullptr); |
| |
| uint8_t h[97]; |
| ASSERT_TRUE(pmbtoken_exp1_get_h_for_testing(h)); |
| EXPECT_EQ(Bytes(h), Bytes(expected_bytes, expected_len)); |
| } |
| |
| // Test that H in |TRUST_TOKEN_experiment_v2_pmb| was computed correctly. |
| TEST(TrustTokenTest, HExp2) { |
| const EC_GROUP *group = EC_GROUP_new_by_curve_name(NID_secp384r1); |
| ASSERT_TRUE(group); |
| |
| const uint8_t kHGen[] = "generator"; |
| const uint8_t kHLabel[] = "PMBTokens Experiment V2 HashH"; |
| |
| bssl::UniquePtr<EC_POINT> expected_h(EC_POINT_new(group)); |
| ASSERT_TRUE(expected_h); |
| ASSERT_TRUE(ec_hash_to_curve_p384_xmd_sha512_sswu_draft07( |
| group, &expected_h->raw, kHLabel, sizeof(kHLabel), kHGen, sizeof(kHGen))); |
| uint8_t expected_bytes[1 + 2 * EC_MAX_BYTES]; |
| size_t expected_len = |
| EC_POINT_point2oct(group, expected_h.get(), POINT_CONVERSION_UNCOMPRESSED, |
| expected_bytes, sizeof(expected_bytes), nullptr); |
| |
| uint8_t h[97]; |
| ASSERT_TRUE(pmbtoken_exp2_get_h_for_testing(h)); |
| EXPECT_EQ(Bytes(h), Bytes(expected_bytes, expected_len)); |
| } |
| |
| static std::vector<const TRUST_TOKEN_METHOD *> AllMethods() { |
| return { |
| TRUST_TOKEN_experiment_v1(), |
| TRUST_TOKEN_experiment_v2_voprf(), |
| TRUST_TOKEN_experiment_v2_pmb() |
| }; |
| } |
| |
| class TrustTokenProtocolTestBase : public ::testing::Test { |
| public: |
| explicit TrustTokenProtocolTestBase(const TRUST_TOKEN_METHOD *method_arg) |
| : method_(method_arg) {} |
| |
| // KeyID returns the key ID associated with key index |i|. |
| static uint32_t KeyID(size_t i) { |
| // Use a different value from the indices to that we do not mix them up. |
| return 7 + i; |
| } |
| |
| const TRUST_TOKEN_METHOD *method() { return method_; } |
| |
| protected: |
| void SetupContexts() { |
| client.reset(TRUST_TOKEN_CLIENT_new(method(), client_max_batchsize)); |
| ASSERT_TRUE(client); |
| issuer.reset(TRUST_TOKEN_ISSUER_new(method(), issuer_max_batchsize)); |
| ASSERT_TRUE(issuer); |
| |
| for (size_t i = 0; i < method()->max_keys; i++) { |
| uint8_t priv_key[TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE]; |
| uint8_t pub_key[TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE]; |
| size_t priv_key_len, pub_key_len, key_index; |
| ASSERT_TRUE(TRUST_TOKEN_generate_key( |
| method(), priv_key, &priv_key_len, TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE, |
| pub_key, &pub_key_len, TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE, KeyID(i))); |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_add_key(client.get(), &key_index, pub_key, |
| pub_key_len)); |
| ASSERT_EQ(i, key_index); |
| ASSERT_TRUE( |
| TRUST_TOKEN_ISSUER_add_key(issuer.get(), priv_key, priv_key_len)); |
| } |
| |
| uint8_t public_key[32], private_key[64]; |
| ED25519_keypair(public_key, private_key); |
| bssl::UniquePtr<EVP_PKEY> priv(EVP_PKEY_new_raw_private_key( |
| EVP_PKEY_ED25519, nullptr, private_key, 32)); |
| ASSERT_TRUE(priv); |
| bssl::UniquePtr<EVP_PKEY> pub( |
| EVP_PKEY_new_raw_public_key(EVP_PKEY_ED25519, nullptr, public_key, 32)); |
| ASSERT_TRUE(pub); |
| |
| TRUST_TOKEN_CLIENT_set_srr_key(client.get(), pub.get()); |
| TRUST_TOKEN_ISSUER_set_srr_key(issuer.get(), priv.get()); |
| RAND_bytes(metadata_key, sizeof(metadata_key)); |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_set_metadata_key(issuer.get(), metadata_key, |
| sizeof(metadata_key))); |
| } |
| |
| const TRUST_TOKEN_METHOD *method_; |
| uint16_t client_max_batchsize = 10; |
| uint16_t issuer_max_batchsize = 10; |
| bssl::UniquePtr<TRUST_TOKEN_CLIENT> client; |
| bssl::UniquePtr<TRUST_TOKEN_ISSUER> issuer; |
| uint8_t metadata_key[32]; |
| }; |
| |
| class TrustTokenProtocolTest |
| : public TrustTokenProtocolTestBase, |
| public testing::WithParamInterface<const TRUST_TOKEN_METHOD *> { |
| public: |
| TrustTokenProtocolTest() : TrustTokenProtocolTestBase(GetParam()) {} |
| }; |
| |
| INSTANTIATE_TEST_SUITE_P(TrustTokenAllProtocolTest, TrustTokenProtocolTest, |
| testing::ValuesIn(AllMethods())); |
| |
| TEST_P(TrustTokenProtocolTest, InvalidToken) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| |
| size_t key_index; |
| size_t tokens_issued; |
| ASSERT_TRUE( |
| TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, &msg_len, 1)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/KeyID(0), /*private_metadata=*/0, |
| /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_TRUE(tokens); |
| |
| for (TRUST_TOKEN *token : tokens.get()) { |
| // Corrupt the token. |
| token->data[0] ^= 0x42; |
| |
| uint8_t *redeem_msg = NULL, *redeem_resp = NULL; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_redemption( |
| client.get(), &redeem_msg, &msg_len, token, NULL, 0, 0)); |
| bssl::UniquePtr<uint8_t> free_redeem_msg(redeem_msg); |
| TRUST_TOKEN *rtoken; |
| uint8_t *client_data; |
| size_t client_data_len; |
| uint64_t redemption_time; |
| ASSERT_FALSE(TRUST_TOKEN_ISSUER_redeem( |
| issuer.get(), &redeem_resp, &resp_len, &rtoken, &client_data, |
| &client_data_len, &redemption_time, redeem_msg, msg_len, 600)); |
| bssl::UniquePtr<uint8_t> free_redeem_resp(redeem_resp); |
| } |
| } |
| |
| TEST_P(TrustTokenProtocolTest, TruncatedIssuanceRequest) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| msg_len = 10; |
| size_t tokens_issued; |
| ASSERT_FALSE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/KeyID(0), /*private_metadata=*/0, |
| /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| } |
| |
| TEST_P(TrustTokenProtocolTest, TruncatedIssuanceResponse) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/KeyID(0), /*private_metadata=*/0, |
| /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| resp_len = 10; |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_FALSE(tokens); |
| } |
| |
| TEST_P(TrustTokenProtocolTest, ExtraDataIssuanceResponse) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *request = NULL, *response = NULL; |
| size_t request_len, response_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &request, |
| &request_len, 10)); |
| bssl::UniquePtr<uint8_t> free_request(request); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue(issuer.get(), &response, &response_len, |
| &tokens_issued, request, request_len, |
| /*public_metadata=*/KeyID(0), |
| /*private_metadata=*/0, |
| /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_response(response); |
| std::vector<uint8_t> response2(response, response + response_len); |
| response2.push_back(0); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, |
| response2.data(), response2.size())); |
| ASSERT_FALSE(tokens); |
| } |
| |
| TEST_P(TrustTokenProtocolTest, TruncatedRedemptionRequest) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/KeyID(0), /*private_metadata=*/0, |
| /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_TRUE(tokens); |
| |
| for (TRUST_TOKEN *token : tokens.get()) { |
| const uint8_t kClientData[] = "\x70TEST CLIENT DATA"; |
| uint64_t kRedemptionTime = (method()->has_srr ? 13374242 : 0); |
| |
| uint8_t *redeem_msg = NULL, *redeem_resp = NULL; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_redemption( |
| client.get(), &redeem_msg, &msg_len, token, kClientData, |
| sizeof(kClientData) - 1, kRedemptionTime)); |
| bssl::UniquePtr<uint8_t> free_redeem_msg(redeem_msg); |
| msg_len = 10; |
| |
| TRUST_TOKEN *rtoken; |
| uint8_t *client_data; |
| size_t client_data_len; |
| uint64_t redemption_time; |
| ASSERT_FALSE(TRUST_TOKEN_ISSUER_redeem( |
| issuer.get(), &redeem_resp, &resp_len, &rtoken, &client_data, |
| &client_data_len, &redemption_time, redeem_msg, msg_len, 600)); |
| } |
| } |
| |
| TEST_P(TrustTokenProtocolTest, TruncatedRedemptionResponse) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/KeyID(0), /*private_metadata=*/0, |
| /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_TRUE(tokens); |
| |
| for (TRUST_TOKEN *token : tokens.get()) { |
| const uint8_t kClientData[] = "\x70TEST CLIENT DATA"; |
| uint64_t kRedemptionTime = 0; |
| |
| uint8_t *redeem_msg = NULL, *redeem_resp = NULL; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_redemption( |
| client.get(), &redeem_msg, &msg_len, token, kClientData, |
| sizeof(kClientData) - 1, kRedemptionTime)); |
| bssl::UniquePtr<uint8_t> free_redeem_msg(redeem_msg); |
| TRUST_TOKEN *rtoken; |
| uint8_t *client_data; |
| size_t client_data_len; |
| uint64_t redemption_time; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_redeem( |
| issuer.get(), &redeem_resp, &resp_len, &rtoken, &client_data, |
| &client_data_len, &redemption_time, redeem_msg, msg_len, 600)); |
| bssl::UniquePtr<uint8_t> free_redeem_resp(redeem_resp); |
| bssl::UniquePtr<uint8_t> free_client_data(client_data); |
| bssl::UniquePtr<TRUST_TOKEN> free_rtoken(rtoken); |
| |
| ASSERT_EQ(redemption_time, kRedemptionTime); |
| ASSERT_EQ(Bytes(kClientData, sizeof(kClientData) - 1), |
| Bytes(client_data, client_data_len)); |
| resp_len = 10; |
| |
| // If the protocol doesn't use SRRs, TRUST_TOKEN_CLIENT_finish_redemtpion |
| // leaves all SRR validation to the caller. |
| uint8_t *srr = NULL, *sig = NULL; |
| size_t srr_len, sig_len; |
| bool expect_failure = !method()->has_srr; |
| ASSERT_EQ(expect_failure, TRUST_TOKEN_CLIENT_finish_redemption( |
| client.get(), &srr, &srr_len, &sig, &sig_len, |
| redeem_resp, resp_len)); |
| bssl::UniquePtr<uint8_t> free_srr(srr); |
| bssl::UniquePtr<uint8_t> free_sig(sig); |
| } |
| } |
| |
| TEST_P(TrustTokenProtocolTest, IssuedWithBadKeyID) { |
| client.reset(TRUST_TOKEN_CLIENT_new(method(), client_max_batchsize)); |
| ASSERT_TRUE(client); |
| issuer.reset(TRUST_TOKEN_ISSUER_new(method(), issuer_max_batchsize)); |
| ASSERT_TRUE(issuer); |
| |
| // We configure the client and the issuer with different key IDs and test |
| // that the client notices. |
| const uint32_t kClientKeyID = 0; |
| const uint32_t kIssuerKeyID = 42; |
| |
| uint8_t priv_key[TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE]; |
| uint8_t pub_key[TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE]; |
| size_t priv_key_len, pub_key_len, key_index; |
| ASSERT_TRUE(TRUST_TOKEN_generate_key( |
| method(), priv_key, &priv_key_len, TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE, |
| pub_key, &pub_key_len, TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE, kClientKeyID)); |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_add_key(client.get(), &key_index, pub_key, |
| pub_key_len)); |
| ASSERT_EQ(0UL, key_index); |
| |
| ASSERT_TRUE(TRUST_TOKEN_generate_key( |
| method(), priv_key, &priv_key_len, TRUST_TOKEN_MAX_PRIVATE_KEY_SIZE, |
| pub_key, &pub_key_len, TRUST_TOKEN_MAX_PUBLIC_KEY_SIZE, kIssuerKeyID)); |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_add_key(issuer.get(), priv_key, priv_key_len)); |
| |
| |
| uint8_t public_key[32], private_key[64]; |
| ED25519_keypair(public_key, private_key); |
| bssl::UniquePtr<EVP_PKEY> priv( |
| EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, nullptr, private_key, 32)); |
| ASSERT_TRUE(priv); |
| bssl::UniquePtr<EVP_PKEY> pub( |
| EVP_PKEY_new_raw_public_key(EVP_PKEY_ED25519, nullptr, public_key, 32)); |
| ASSERT_TRUE(pub); |
| |
| TRUST_TOKEN_CLIENT_set_srr_key(client.get(), pub.get()); |
| TRUST_TOKEN_ISSUER_set_srr_key(issuer.get(), priv.get()); |
| RAND_bytes(metadata_key, sizeof(metadata_key)); |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_set_metadata_key(issuer.get(), metadata_key, |
| sizeof(metadata_key))); |
| |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/42, /*private_metadata=*/0, /*max_issuance=*/10)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_FALSE(tokens); |
| } |
| |
| class TrustTokenMetadataTest |
| : public TrustTokenProtocolTestBase, |
| public testing::WithParamInterface< |
| std::tuple<const TRUST_TOKEN_METHOD *, int, bool>> { |
| public: |
| TrustTokenMetadataTest() |
| : TrustTokenProtocolTestBase(std::get<0>(GetParam())) {} |
| |
| int public_metadata() { return std::get<1>(GetParam()); } |
| bool private_metadata() { return std::get<2>(GetParam()); } |
| }; |
| |
| TEST_P(TrustTokenMetadataTest, SetAndGetMetadata) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| bool result = TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| public_metadata(), private_metadata(), /*max_issuance=*/1); |
| if (!method()->has_private_metadata && private_metadata()) { |
| ASSERT_FALSE(result); |
| return; |
| } |
| ASSERT_TRUE(result); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_TRUE(tokens); |
| |
| for (TRUST_TOKEN *token : tokens.get()) { |
| const uint8_t kClientData[] = "\x70TEST CLIENT DATA"; |
| uint64_t kRedemptionTime = (method()->has_srr ? 13374242 : 0); |
| |
| const uint8_t kExpectedSRRV1[] = |
| "\xa4\x68\x6d\x65\x74\x61\x64\x61\x74\x61\xa2\x66\x70\x75\x62\x6c\x69" |
| "\x63\x00\x67\x70\x72\x69\x76\x61\x74\x65\x00\x6a\x74\x6f\x6b\x65\x6e" |
| "\x2d\x68\x61\x73\x68\x58\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x00\x6b\x63\x6c\x69\x65\x6e\x74\x2d\x64\x61\x74\x61" |
| "\x70\x54\x45\x53\x54\x20\x43\x4c\x49\x45\x4e\x54\x20\x44\x41\x54\x41" |
| "\x70\x65\x78\x70\x69\x72\x79\x2d\x74\x69\x6d\x65\x73\x74\x61\x6d\x70" |
| "\x1a\x00\xcc\x15\x7a"; |
| |
| const uint8_t kExpectedSRRV2[] = |
| "\xa4\x68\x6d\x65\x74\x61\x64\x61\x74\x61\xa2\x66\x70\x75\x62\x6c\x69" |
| "\x63\x00\x67\x70\x72\x69\x76\x61\x74\x65\x00\x6a\x74\x6f\x6b\x65\x6e" |
| "\x2d\x68\x61\x73\x68\x58\x20\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x00\x6b\x63\x6c\x69\x65\x6e\x74\x2d\x64\x61\x74\x61" |
| "\x70\x54\x45\x53\x54\x20\x43\x4c\x49\x45\x4e\x54\x20\x44\x41\x54\x41" |
| "\x70\x65\x78\x70\x69\x72\x79\x2d\x74\x69\x6d\x65\x73\x74\x61\x6d\x70" |
| "\x00"; |
| |
| const uint8_t *expected_srr = kExpectedSRRV1; |
| size_t expected_srr_len = sizeof(kExpectedSRRV1) - 1; |
| if (!method()->has_srr) { |
| expected_srr = kExpectedSRRV2; |
| expected_srr_len = sizeof(kExpectedSRRV2) - 1; |
| } |
| |
| uint8_t *redeem_msg = NULL, *redeem_resp = NULL; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_redemption( |
| client.get(), &redeem_msg, &msg_len, token, kClientData, |
| sizeof(kClientData) - 1, kRedemptionTime)); |
| bssl::UniquePtr<uint8_t> free_redeem_msg(redeem_msg); |
| TRUST_TOKEN *rtoken; |
| uint8_t *client_data; |
| size_t client_data_len; |
| uint64_t redemption_time; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_redeem( |
| issuer.get(), &redeem_resp, &resp_len, &rtoken, &client_data, |
| &client_data_len, &redemption_time, redeem_msg, msg_len, 600)); |
| bssl::UniquePtr<uint8_t> free_redeem_resp(redeem_resp); |
| bssl::UniquePtr<uint8_t> free_client_data(client_data); |
| bssl::UniquePtr<TRUST_TOKEN> free_rtoken(rtoken); |
| |
| ASSERT_EQ(redemption_time, kRedemptionTime); |
| ASSERT_EQ(Bytes(kClientData, sizeof(kClientData) - 1), |
| Bytes(client_data, client_data_len)); |
| |
| uint8_t *srr = NULL, *sig = NULL; |
| size_t srr_len, sig_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_finish_redemption( |
| client.get(), &srr, &srr_len, &sig, &sig_len, redeem_resp, resp_len)); |
| bssl::UniquePtr<uint8_t> free_srr(srr); |
| bssl::UniquePtr<uint8_t> free_sig(sig); |
| |
| if (!method()->has_srr) { |
| size_t b64_len; |
| ASSERT_TRUE(EVP_EncodedLength(&b64_len, expected_srr_len)); |
| b64_len -= 1; |
| const char kSRRHeader[] = "body=:"; |
| ASSERT_LT(sizeof(kSRRHeader) - 1 + b64_len, srr_len); |
| |
| ASSERT_EQ(Bytes(kSRRHeader, sizeof(kSRRHeader) - 1), |
| Bytes(srr, sizeof(kSRRHeader) - 1)); |
| uint8_t *decoded_srr = |
| (uint8_t *)OPENSSL_malloc(expected_srr_len + 2); |
| ASSERT_TRUE(decoded_srr); |
| ASSERT_LE( |
| int(expected_srr_len), |
| EVP_DecodeBlock(decoded_srr, srr + sizeof(kSRRHeader) - 1, b64_len)); |
| srr = decoded_srr; |
| srr_len = expected_srr_len; |
| free_srr.reset(srr); |
| } |
| |
| const uint8_t kTokenHashDSTLabel[] = "TrustTokenV0 TokenHash"; |
| uint8_t token_hash[SHA256_DIGEST_LENGTH]; |
| SHA256_CTX sha_ctx; |
| SHA256_Init(&sha_ctx); |
| SHA256_Update(&sha_ctx, kTokenHashDSTLabel, sizeof(kTokenHashDSTLabel)); |
| SHA256_Update(&sha_ctx, token->data, token->len); |
| SHA256_Final(token_hash, &sha_ctx); |
| |
| // Check the token hash is in the SRR. |
| ASSERT_EQ(Bytes(token_hash), Bytes(srr + 41, sizeof(token_hash))); |
| |
| uint8_t decode_private_metadata; |
| ASSERT_TRUE(TRUST_TOKEN_decode_private_metadata( |
| method(), &decode_private_metadata, metadata_key, |
| sizeof(metadata_key), token_hash, sizeof(token_hash), srr[27])); |
| ASSERT_EQ(srr[18], public_metadata()); |
| ASSERT_EQ(decode_private_metadata, private_metadata()); |
| |
| // Clear out the metadata bits. |
| srr[18] = 0; |
| srr[27] = 0; |
| |
| // Clear out the token hash. |
| OPENSSL_memset(srr + 41, 0, sizeof(token_hash)); |
| |
| ASSERT_EQ(Bytes(expected_srr, expected_srr_len), |
| Bytes(srr, srr_len)); |
| } |
| } |
| |
| TEST_P(TrustTokenMetadataTest, RawSetAndGetMetadata) { |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| bool result = TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| public_metadata(), private_metadata(), /*max_issuance=*/1); |
| if (!method()->has_private_metadata && private_metadata()) { |
| ASSERT_FALSE(result); |
| return; |
| } |
| ASSERT_TRUE(result); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_TRUE(tokens); |
| EXPECT_EQ(1u, sk_TRUST_TOKEN_num(tokens.get())); |
| |
| for (TRUST_TOKEN *token : tokens.get()) { |
| const uint8_t kClientData[] = "\x70TEST CLIENT DATA"; |
| uint64_t kRedemptionTime = (method()->has_srr ? 13374242 : 0); |
| |
| uint8_t *redeem_msg = NULL; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_redemption( |
| client.get(), &redeem_msg, &msg_len, token, kClientData, |
| sizeof(kClientData) - 1, kRedemptionTime)); |
| bssl::UniquePtr<uint8_t> free_redeem_msg(redeem_msg); |
| uint32_t public_value; |
| uint8_t private_value; |
| TRUST_TOKEN *rtoken; |
| uint8_t *client_data; |
| size_t client_data_len; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_redeem_raw( |
| issuer.get(), &public_value, &private_value, &rtoken, |
| &client_data, &client_data_len, redeem_msg, msg_len)); |
| bssl::UniquePtr<uint8_t> free_client_data(client_data); |
| bssl::UniquePtr<TRUST_TOKEN> free_rtoken(rtoken); |
| |
| ASSERT_EQ(Bytes(kClientData, sizeof(kClientData) - 1), |
| Bytes(client_data, client_data_len)); |
| ASSERT_EQ(public_value, static_cast<uint32_t>(public_metadata())); |
| ASSERT_EQ(private_value, private_metadata()); |
| } |
| } |
| |
| TEST_P(TrustTokenMetadataTest, TooManyRequests) { |
| if (!method()->has_private_metadata && private_metadata()) { |
| return; |
| } |
| |
| issuer_max_batchsize = 1; |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| public_metadata(), private_metadata(), /*max_issuance=*/1)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| ASSERT_EQ(tokens_issued, issuer_max_batchsize); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| ASSERT_TRUE(tokens); |
| ASSERT_EQ(sk_TRUST_TOKEN_num(tokens.get()), 1UL); |
| } |
| |
| |
| TEST_P(TrustTokenMetadataTest, TruncatedProof) { |
| if (!method()->has_private_metadata && private_metadata()) { |
| return; |
| } |
| |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| public_metadata(), private_metadata(), /*max_issuance=*/1)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| |
| CBS real_response; |
| CBS_init(&real_response, issue_resp, resp_len); |
| uint16_t count; |
| uint32_t parsed_public_metadata; |
| bssl::ScopedCBB bad_response; |
| ASSERT_TRUE(CBB_init(bad_response.get(), 0)); |
| ASSERT_TRUE(CBS_get_u16(&real_response, &count)); |
| ASSERT_TRUE(CBB_add_u16(bad_response.get(), count)); |
| ASSERT_TRUE(CBS_get_u32(&real_response, &parsed_public_metadata)); |
| ASSERT_TRUE(CBB_add_u32(bad_response.get(), parsed_public_metadata)); |
| |
| const EC_GROUP *group = EC_GROUP_new_by_curve_name(NID_secp384r1); |
| size_t token_length = |
| TRUST_TOKEN_NONCE_SIZE + 2 * (1 + 2 * BN_num_bytes(&group->field)); |
| if (method() == TRUST_TOKEN_experiment_v1()) { |
| token_length += 4; |
| } |
| if (method() == TRUST_TOKEN_experiment_v2_voprf()) { |
| token_length = 1 + 2 * BN_num_bytes(&group->field); |
| } |
| for (size_t i = 0; i < count; i++) { |
| ASSERT_TRUE(CBB_add_bytes(bad_response.get(), CBS_data(&real_response), |
| token_length)); |
| ASSERT_TRUE(CBS_skip(&real_response, token_length)); |
| } |
| |
| CBS tmp; |
| ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp)); |
| CBB dleq; |
| ASSERT_TRUE(CBB_add_u16_length_prefixed(bad_response.get(), &dleq)); |
| ASSERT_TRUE(CBB_add_bytes(&dleq, CBS_data(&tmp), CBS_len(&tmp) - 2)); |
| ASSERT_TRUE(CBB_flush(bad_response.get())); |
| |
| uint8_t *bad_buf; |
| size_t bad_len; |
| ASSERT_TRUE(CBB_finish(bad_response.get(), &bad_buf, &bad_len)); |
| bssl::UniquePtr<uint8_t> free_bad(bad_buf); |
| |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, bad_buf, |
| bad_len)); |
| ASSERT_FALSE(tokens); |
| } |
| |
| TEST_P(TrustTokenMetadataTest, ExcessDataProof) { |
| if (!method()->has_private_metadata && private_metadata()) { |
| return; |
| } |
| |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| public_metadata(), private_metadata(), /*max_issuance=*/1)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| |
| CBS real_response; |
| CBS_init(&real_response, issue_resp, resp_len); |
| uint16_t count; |
| uint32_t parsed_public_metadata; |
| bssl::ScopedCBB bad_response; |
| ASSERT_TRUE(CBB_init(bad_response.get(), 0)); |
| ASSERT_TRUE(CBS_get_u16(&real_response, &count)); |
| ASSERT_TRUE(CBB_add_u16(bad_response.get(), count)); |
| ASSERT_TRUE(CBS_get_u32(&real_response, &parsed_public_metadata)); |
| ASSERT_TRUE(CBB_add_u32(bad_response.get(), parsed_public_metadata)); |
| |
| const EC_GROUP *group = EC_GROUP_new_by_curve_name(NID_secp384r1); |
| size_t token_length = |
| TRUST_TOKEN_NONCE_SIZE + 2 * (1 + 2 * BN_num_bytes(&group->field)); |
| if (method() == TRUST_TOKEN_experiment_v1()) { |
| token_length += 4; |
| } |
| if (method() == TRUST_TOKEN_experiment_v2_voprf()) { |
| token_length = 1 + 2 * BN_num_bytes(&group->field); |
| } |
| for (size_t i = 0; i < count; i++) { |
| ASSERT_TRUE(CBB_add_bytes(bad_response.get(), CBS_data(&real_response), |
| token_length)); |
| ASSERT_TRUE(CBS_skip(&real_response, token_length)); |
| } |
| |
| CBS tmp; |
| ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp)); |
| CBB dleq; |
| ASSERT_TRUE(CBB_add_u16_length_prefixed(bad_response.get(), &dleq)); |
| ASSERT_TRUE(CBB_add_bytes(&dleq, CBS_data(&tmp), CBS_len(&tmp))); |
| ASSERT_TRUE(CBB_add_u16(&dleq, 42)); |
| ASSERT_TRUE(CBB_flush(bad_response.get())); |
| |
| uint8_t *bad_buf; |
| size_t bad_len; |
| ASSERT_TRUE(CBB_finish(bad_response.get(), &bad_buf, &bad_len)); |
| bssl::UniquePtr<uint8_t> free_bad(bad_buf); |
| |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, bad_buf, |
| bad_len)); |
| ASSERT_FALSE(tokens); |
| } |
| |
| INSTANTIATE_TEST_SUITE_P( |
| TrustTokenAllMetadataTest, TrustTokenMetadataTest, |
| testing::Combine(testing::ValuesIn(AllMethods()), |
| testing::Values(TrustTokenProtocolTest::KeyID(0), |
| TrustTokenProtocolTest::KeyID(1), |
| TrustTokenProtocolTest::KeyID(2)), |
| testing::Bool())); |
| |
| class TrustTokenBadKeyTest |
| : public TrustTokenProtocolTestBase, |
| public testing::WithParamInterface< |
| std::tuple<const TRUST_TOKEN_METHOD *, bool, int>> { |
| public: |
| TrustTokenBadKeyTest() |
| : TrustTokenProtocolTestBase(std::get<0>(GetParam())) {} |
| |
| bool private_metadata() { return std::get<1>(GetParam()); } |
| int corrupted_key() { return std::get<2>(GetParam()); } |
| }; |
| |
| TEST_P(TrustTokenBadKeyTest, BadKey) { |
| // For versions without private metadata, only corruptions of 'xs' (the 4th |
| // entry in |scalars| below) result in a bad key, as the other scalars are |
| // unused internally. |
| if (!method()->has_private_metadata && |
| (private_metadata() || corrupted_key() != 4)) { |
| return; |
| } |
| |
| ASSERT_NO_FATAL_FAILURE(SetupContexts()); |
| |
| uint8_t *issue_msg = NULL, *issue_resp = NULL; |
| size_t msg_len, resp_len; |
| ASSERT_TRUE(TRUST_TOKEN_CLIENT_begin_issuance(client.get(), &issue_msg, |
| &msg_len, 10)); |
| bssl::UniquePtr<uint8_t> free_issue_msg(issue_msg); |
| |
| struct trust_token_issuer_key_st *key = &issuer->keys[0]; |
| EC_SCALAR *scalars[] = {&key->key.x0, &key->key.y0, &key->key.x1, |
| &key->key.y1, &key->key.xs, &key->key.ys}; |
| |
| // Corrupt private key scalar. |
| scalars[corrupted_key()]->words[0] ^= 42; |
| |
| size_t tokens_issued; |
| ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue( |
| issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len, |
| /*public_metadata=*/7, private_metadata(), /*max_issuance=*/1)); |
| bssl::UniquePtr<uint8_t> free_msg(issue_resp); |
| size_t key_index; |
| bssl::UniquePtr<STACK_OF(TRUST_TOKEN)> tokens( |
| TRUST_TOKEN_CLIENT_finish_issuance(client.get(), &key_index, issue_resp, |
| resp_len)); |
| |
| // If the unused private key is corrupted, then the DLEQ proof should succeed. |
| if ((corrupted_key() / 2 == 0 && private_metadata() == true) || |
| (corrupted_key() / 2 == 1 && private_metadata() == false)) { |
| ASSERT_TRUE(tokens); |
| } else { |
| ASSERT_FALSE(tokens); |
| } |
| } |
| |
| INSTANTIATE_TEST_SUITE_P(TrustTokenAllBadKeyTest, TrustTokenBadKeyTest, |
| testing::Combine(testing::ValuesIn(AllMethods()), |
| testing::Bool(), |
| testing::Values(0, 1, 2, 3, 4, 5))); |
| |
| } // namespace |
| BSSL_NAMESPACE_END |
