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/* 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/trust_token.h>
#include "../internal.h"
#include "internal.h"
BSSL_NAMESPACE_BEGIN
namespace {
TEST(TrustTokenTest, KeyGen) {
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(
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(400u, priv_key_len);
ASSERT_EQ(409u, pub_key_len);
}
class TrustTokenProtocolTest : public ::testing::Test {
public:
// 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;
}
protected:
void SetupContexts() {
client.reset(TRUST_TOKEN_CLIENT_new(client_max_batchsize));
ASSERT_TRUE(client);
issuer.reset(TRUST_TOKEN_ISSUER_new(issuer_max_batchsize));
ASSERT_TRUE(issuer);
for (size_t i = 0; i < 3; 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(
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)));
}
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];
};
TEST_F(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;
uint8_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=*/1,
/*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_F(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;
uint8_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_F(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);
uint8_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_F(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);
uint8_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_F(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);
uint8_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 = 13374242;
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_F(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);
uint8_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 = 13374242;
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_TRUE(sizeof(kClientData) - 1 == client_data_len);
ASSERT_EQ(OPENSSL_memcmp(kClientData, client_data, client_data_len), 0);
resp_len = 10;
uint8_t *srr = NULL, *sig = NULL;
size_t srr_len, sig_len;
ASSERT_FALSE(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_F(TrustTokenProtocolTest, IssuedWithBadKeyID) {
client.reset(TRUST_TOKEN_CLIENT_new(client_max_batchsize));
ASSERT_TRUE(client);
issuer.reset(TRUST_TOKEN_ISSUER_new(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(
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(
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);
uint8_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 TrustTokenProtocolTest,
public testing::WithParamInterface<std::tuple<int, bool>> {};
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);
uint8_t tokens_issued;
ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue(
issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len,
std::get<0>(GetParam()), std::get<1>(GetParam()), /*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));
ASSERT_TRUE(tokens);
for (TRUST_TOKEN *token : tokens.get()) {
const uint8_t kClientData[] = "\x70TEST CLIENT DATA";
uint64_t kRedemptionTime = 13374242;
const uint8_t kExpectedSRR[] =
"\xa3\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\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";
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_TRUE(sizeof(kClientData) - 1 == client_data_len);
ASSERT_EQ(OPENSSL_memcmp(kClientData, client_data, client_data_len), 0);
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);
uint8_t private_metadata;
ASSERT_TRUE(TRUST_TOKEN_decode_private_metadata(
&private_metadata, metadata_key, sizeof(metadata_key), kClientData,
sizeof(kClientData) - 1, srr[27]));
ASSERT_EQ(srr[18], std::get<0>(GetParam()));
ASSERT_EQ(private_metadata, std::get<1>(GetParam()));
// Clear out the metadata bits.
srr[18] = 0;
srr[27] = 0;
ASSERT_TRUE(sizeof(kExpectedSRR) - 1 == srr_len);
ASSERT_EQ(OPENSSL_memcmp(kExpectedSRR, srr, srr_len), 0);
}
}
TEST_P(TrustTokenMetadataTest, TooManyRequests) {
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);
uint8_t tokens_issued;
ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue(
issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len,
std::get<0>(GetParam()), std::get<1>(GetParam()), /*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) {
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);
uint8_t tokens_issued;
ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue(
issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len,
std::get<0>(GetParam()), std::get<1>(GetParam()), /*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 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, &public_metadata));
ASSERT_TRUE(CBB_add_u32(bad_response.get(), public_metadata));
for (size_t i = 0; i < count; i++) {
uint8_t s[PMBTOKEN_NONCE_SIZE];
CBS tmp;
ASSERT_TRUE(CBS_copy_bytes(&real_response, s, PMBTOKEN_NONCE_SIZE));
ASSERT_TRUE(CBB_add_bytes(bad_response.get(), s, PMBTOKEN_NONCE_SIZE));
ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), CBS_len(&tmp)));
ASSERT_TRUE(
CBB_add_bytes(bad_response.get(), CBS_data(&tmp), CBS_len(&tmp)));
ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), CBS_len(&tmp)));
ASSERT_TRUE(
CBB_add_bytes(bad_response.get(), CBS_data(&tmp), CBS_len(&tmp)));
ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), CBS_len(&tmp) - 2));
ASSERT_TRUE(
CBB_add_bytes(bad_response.get(), CBS_data(&tmp), CBS_len(&tmp) - 2));
}
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) {
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);
uint8_t tokens_issued;
ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue(
issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len,
std::get<0>(GetParam()), std::get<1>(GetParam()), /*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 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, &public_metadata));
ASSERT_TRUE(CBB_add_u32(bad_response.get(), public_metadata));
for (size_t i = 0; i < count; i++) {
uint8_t s[PMBTOKEN_NONCE_SIZE];
CBS tmp;
ASSERT_TRUE(CBS_copy_bytes(&real_response, s, PMBTOKEN_NONCE_SIZE));
ASSERT_TRUE(CBB_add_bytes(bad_response.get(), s, PMBTOKEN_NONCE_SIZE));
ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), CBS_len(&tmp)));
ASSERT_TRUE(
CBB_add_bytes(bad_response.get(), CBS_data(&tmp), CBS_len(&tmp)));
ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), CBS_len(&tmp)));
ASSERT_TRUE(
CBB_add_bytes(bad_response.get(), CBS_data(&tmp), CBS_len(&tmp)));
ASSERT_TRUE(CBS_get_u16_length_prefixed(&real_response, &tmp));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), CBS_len(&tmp) + 2));
ASSERT_TRUE(
CBB_add_bytes(bad_response.get(), CBS_data(&tmp), CBS_len(&tmp)));
ASSERT_TRUE(CBB_add_u16(bad_response.get(), 42));
}
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::Values(TrustTokenProtocolTest::KeyID(0),
TrustTokenProtocolTest::KeyID(1),
TrustTokenProtocolTest::KeyID(2)),
testing::Bool()));
class TrustTokenBadKeyTest
: public TrustTokenProtocolTest,
public testing::WithParamInterface<std::tuple<bool, int>> {};
TEST_P(TrustTokenBadKeyTest, BadKey) {
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->x0, &key->y0, &key->x1,
&key->y1, &key->xs, &key->ys};
int corrupted_key = std::get<1>(GetParam());
// Corrupt private key scalar.
scalars[corrupted_key]->bytes[0] ^= 42;
uint8_t tokens_issued;
ASSERT_TRUE(TRUST_TOKEN_ISSUER_issue(
issuer.get(), &issue_resp, &resp_len, &tokens_issued, issue_msg, msg_len,
/*public_metadata=*/7, std::get<0>(GetParam()), /*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 && std::get<0>(GetParam()) == true) ||
(corrupted_key / 2 == 1 && std::get<0>(GetParam()) == false)) {
ASSERT_TRUE(tokens);
} else {
ASSERT_FALSE(tokens);
}
}
INSTANTIATE_TEST_SUITE_P(
TrustTokenAllBadKeyTest, TrustTokenBadKeyTest,
testing::Combine(testing::Bool(),
testing::Values(0, 1, 2, 3, 4, 5)));
} // namespace
BSSL_NAMESPACE_END