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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/interest_group/additional_bids_test_util.h"
#include <stdint.h>
#include <string>
#include <vector>
#include "base/base64.h"
#include "base/check.h"
#include "base/json/json_writer.h"
#include "base/strings/strcat.h"
#include "base/values.h"
#include "third_party/boringssl/src/include/openssl/curve25519.h"
namespace content {
std::string GenerateSignedAdditionalBidHeaderPayloadPortion(
SignedAdditionalBidFault inject_fault,
const std::string& bid_string,
const std::vector<const uint8_t*>& private_keys,
const std::vector<std::string>& base64_public_keys) {
CHECK_EQ(private_keys.size(), base64_public_keys.size());
base::Value::Dict signed_additional_bid;
signed_additional_bid.Set("bid", bid_string);
base::Value::List signatures_list;
std::string bid_string_to_sign = bid_string;
if (inject_fault == SignedAdditionalBidFault::kInvalidSignature ||
inject_fault == SignedAdditionalBidFault::kOneInvalidSignature) {
bid_string_to_sign = "something completely different";
}
for (size_t i = 0; i < private_keys.size(); ++i) {
uint8_t sig[64];
bool ok = ED25519_sign(
sig, reinterpret_cast<const uint8_t*>(bid_string_to_sign.data()),
bid_string_to_sign.size(), private_keys[i]);
CHECK(ok);
base::Value::Dict sig_dict;
sig_dict.Set("key", base64_public_keys[i]);
sig_dict.Set("signature", base::Base64Encode(sig));
signatures_list.Append(std::move(sig_dict));
if (inject_fault == SignedAdditionalBidFault::kOneInvalidSignature) {
bid_string_to_sign = bid_string;
}
}
signed_additional_bid.Set("signatures", std::move(signatures_list));
if (inject_fault == SignedAdditionalBidFault::kInvalidSignedBidStructure) {
signed_additional_bid.Remove("bid");
}
std::string signed_additional_bid_str =
base::WriteJson(signed_additional_bid).value();
if (inject_fault == SignedAdditionalBidFault::kInvalidSignedJson) {
signed_additional_bid_str = "}" + signed_additional_bid_str;
}
std::string encoded_signed_additional_bid =
base::Base64Encode(signed_additional_bid_str);
// Prepend some whitespace to make sure the decoder is forgiving.
encoded_signed_additional_bid = " " + encoded_signed_additional_bid;
if (inject_fault == SignedAdditionalBidFault::kInvalidSignedBase64) {
encoded_signed_additional_bid = "??" + encoded_signed_additional_bid;
}
return encoded_signed_additional_bid;
}
std::string GenerateSignedAdditionalBidHeader(
SignedAdditionalBidFault inject_fault,
const std::string& nonce,
const std::string& bid_string,
const std::vector<const uint8_t*>& private_keys,
const std::vector<std::string>& base64_public_keys) {
return base::StrCat(
{nonce, ":",
GenerateSignedAdditionalBidHeaderPayloadPortion(
inject_fault, bid_string, private_keys, base64_public_keys)});
}
} // namespace content
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