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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/mac/trust_util.h"
#include <string>
#include "base/apple/osstatus_logging.h"
#include "base/apple/scoped_cftyperef.h"
#include "base/mac/code_signature.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "remoting/host/version.h"
namespace remoting {
bool IsProcessTrusted(audit_token_t audit_token,
base::span<const std::string_view> identifiers) {
#if defined(OFFICIAL_BUILD)
// See:
// https://developer.apple.com/library/archive/documentation/Security/Conceptual/CodeSigningGuide/RequirementLang/RequirementLang.html
DCHECK_GT(identifiers.size(), 0u);
std::string identifier_requirements =
"identifier \"" + base::JoinString(identifiers, "\" or identifier \"") +
'"';
std::string requirement_string = base::StringPrintf(
// Certificate was issued by Apple
"anchor apple generic and "
// It's Google's certificate
"certificate leaf[subject.OU] = \"%s\" and "
// See:
// https://developer.apple.com/documentation/technotes/tn3127-inside-code-signing-requirements#Xcode-designated-requirement-for-Developer-ID-code
"certificate 1[field.1.2.840.113635.100.6.2.6] and "
"certificate leaf[field.1.2.840.113635.100.6.1.13] and "
// For Chrome Remote Desktop
"(%s)",
MAC_TEAM_ID, identifier_requirements.data());
base::apple::ScopedCFTypeRef<SecRequirementRef> requirement;
OSStatus status = SecRequirementCreateWithString(
base::SysUTF8ToCFStringRef(requirement_string).get(), kSecCSDefaultFlags,
requirement.InitializeInto());
if (status != errSecSuccess) {
OSSTATUS_LOG(ERROR, status)
<< "Failed to create security requirement for string: "
<< requirement_string;
return false;
}
status = base::mac::ProcessIsSignedAndFulfillsRequirement(audit_token,
requirement.get());
if (status == errSecSuccess) {
return true;
}
if (status == errSecCSReqFailed) {
OSSTATUS_LOG(ERROR, status) << "Security requirement unsatisfied";
} else {
OSSTATUS_LOG(ERROR, status)
<< "Unknown error occurred when verifying security requirements";
}
return false;
#else
// Skip codesign verification to allow for local development.
return true;
#endif
}
} // namespace remoting
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