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content / browser / web_package / signed_exchange_signature_header_field.cc [blame]
// Copyright 2018 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/web_package/signed_exchange_signature_header_field.h"
#include <string_view>
#include "base/strings/string_number_conversions.h"
#include "base/trace_event/trace_event.h"
#include "content/browser/web_package/signed_exchange_consts.h"
#include "content/browser/web_package/signed_exchange_utils.h"
#include "crypto/sha2.h"
#include "net/http/structured_headers.h"
namespace content {
// static
std::optional<std::vector<SignedExchangeSignatureHeaderField::Signature>>
SignedExchangeSignatureHeaderField::ParseSignature(
std::string_view signature_str,
SignedExchangeDevToolsProxy* devtools_proxy) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("loading"),
"SignedExchangeSignatureHeaderField::ParseSignature");
std::optional<net::structured_headers::ParameterisedList> values =
net::structured_headers::ParseParameterisedList(signature_str);
if (!values) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse signature header.");
return std::nullopt;
}
std::vector<Signature> signatures;
signatures.reserve(values->size());
for (auto& value : *values) {
if (!value.identifier.is_token()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse signature header.");
return std::nullopt;
}
signatures.push_back(Signature());
Signature& sig = signatures.back();
sig.label = value.identifier.GetString();
const auto& sig_item = value.params[kSig];
if (!sig_item.is_byte_sequence()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse 'sig' parameter.");
return std::nullopt;
}
sig.sig = sig_item.GetString();
if (sig.sig.empty()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'sig' parameter is not set,");
return std::nullopt;
}
const auto& integrity_item = value.params[kIntegrity];
if (!integrity_item.is_string()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse 'integrity' parameter.");
return std::nullopt;
}
sig.integrity = integrity_item.GetString();
if (sig.integrity.empty()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'integrity' parameter is not set.");
return std::nullopt;
}
const auto& cert_url_item = value.params[kCertUrl];
if (!cert_url_item.is_string()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse 'cert-url' parameter.");
return std::nullopt;
}
sig.cert_url = GURL(cert_url_item.GetString());
if (!sig.cert_url.is_valid() || sig.cert_url.has_ref()) {
// TODO(crbug.com/40565993) : When we will support "ed25519Key", the
// params may not have "cert-url".
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'cert-url' parameter is not a valid URL.");
return std::nullopt;
}
if (!sig.cert_url.SchemeIs("https") && !sig.cert_url.SchemeIs("data")) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'cert-url' should have 'https' or 'data' scheme.");
return std::nullopt;
}
const auto& cert_sha256_item = value.params[kCertSha256Key];
if (!cert_sha256_item.is_byte_sequence()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse 'cert-sha256' parameter.");
return std::nullopt;
}
const std::string& cert_sha256_string = cert_sha256_item.GetString();
if (cert_sha256_string.size() != crypto::kSHA256Length) {
// TODO(crbug.com/40565993) : When we will support "ed25519Key", the
// params may not have "cert-sha256".
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'cert-sha256' parameter is not a SHA-256 digest.");
return std::nullopt;
}
net::SHA256HashValue cert_sha256;
memcpy(&cert_sha256.data, cert_sha256_string.data(), crypto::kSHA256Length);
sig.cert_sha256 = std::move(cert_sha256);
// TODO(crbug.com/40565993): Support ed25519key.
// sig.ed25519_key = value.params["ed25519Key"];
const auto& validity_url_item = value.params[kValidityUrlKey];
if (!validity_url_item.is_string()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "Failed to parse 'validity-url' parameter.");
return std::nullopt;
}
sig.validity_url =
signed_exchange_utils::URLWithRawString(validity_url_item.GetString());
if (!sig.validity_url.url.is_valid()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'validity-url' parameter is not a valid URL.");
return std::nullopt;
}
if (sig.validity_url.url.has_ref()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'validity-url' parameter can't have a fragment.");
return std::nullopt;
}
if (!sig.validity_url.url.SchemeIs("https")) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'validity-url' should have 'https' scheme.");
return std::nullopt;
}
const auto& date_item = value.params[kDateKey];
if (!date_item.is_integer()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'date' parameter is not a number.");
return std::nullopt;
}
sig.date = date_item.GetInteger();
const auto& expires_item = value.params[kExpiresKey];
if (!expires_item.is_integer()) {
signed_exchange_utils::ReportErrorAndTraceEvent(
devtools_proxy, "'expires' parameter is not a number.");
return std::nullopt;
}
sig.expires = expires_item.GetInteger();
}
return signatures;
}
SignedExchangeSignatureHeaderField::Signature::Signature() = default;
SignedExchangeSignatureHeaderField::Signature::Signature(
const Signature& other) = default;
SignedExchangeSignatureHeaderField::Signature::~Signature() = default;
} // namespace content