| // Copyright 2019 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/signaling/signaling_id_util.h" |
| |
| #include <stddef.h> |
| |
| #include "base/logging.h" |
| #include "base/strings/string_util.h" |
| #include "base/uuid.h" |
| |
| namespace remoting { |
| |
| namespace { |
| |
| constexpr char kFtlResourcePrefix[] = "chromoting_ftl_"; |
| constexpr char kGmailDomain[] = "gmail.com"; |
| constexpr char kGooglemailDomain[] = "googlemail.com"; |
| |
| } // namespace |
| |
| std::string NormalizeSignalingId(const std::string& id) { |
| std::string email; |
| std::string resource; |
| if (SplitSignalingIdResource(id, &email, &resource)) { |
| std::string normalized_email = resource.find(kFtlResourcePrefix) == 0 |
| ? GetCanonicalEmail(email) |
| : base::ToLowerASCII(email); |
| return normalized_email + "/" + resource; |
| } |
| return base::ToLowerASCII(email); |
| } |
| |
| std::string GetCanonicalEmail(const std::string& email) { |
| DCHECK(email.find('/') == std::string::npos) |
| << "This function expects an email address, not a signaling ID."; |
| std::string canonical_email = base::ToLowerASCII(email); |
| base::TrimString(canonical_email, base::kWhitespaceASCII, &canonical_email); |
| |
| size_t at_index = canonical_email.find('@'); |
| if (at_index == std::string::npos) { |
| LOG(ERROR) << "Unexpected email address. Character '@' is missing."; |
| return canonical_email; |
| } |
| std::string username = canonical_email.substr(0, at_index); |
| std::string domain = canonical_email.substr(at_index + 1); |
| |
| if (domain == kGmailDomain || domain == kGooglemailDomain) { |
| // GMail/GoogleMail domains ignore dots, whereas other domains may not. |
| base::RemoveChars(username, ".", &username); |
| return username + '@' + kGmailDomain; |
| } |
| |
| return canonical_email; |
| } |
| |
| bool SplitSignalingIdResource(const std::string& full_id, |
| std::string* email, |
| std::string* resource) { |
| size_t slash_index = full_id.find('/'); |
| if (slash_index == std::string::npos) { |
| if (email) { |
| *email = full_id; |
| } |
| if (resource) { |
| resource->clear(); |
| } |
| return false; |
| } |
| |
| if (email) { |
| *email = full_id.substr(0, slash_index); |
| } |
| if (resource) { |
| *resource = full_id.substr(slash_index + 1); |
| } |
| return true; |
| } |
| |
| bool IsValidFtlSignalingId(const std::string& signaling_id) { |
| std::string email; |
| std::string resource; |
| if (!SplitSignalingIdResource(signaling_id, &email, &resource)) { |
| LOG(ERROR) << "Failed to split signaling id: " << signaling_id; |
| return false; |
| } |
| if (!base::StartsWith(resource, kFtlResourcePrefix)) { |
| LOG(ERROR) << "Signaling id resource does not start with a valid prefix: " |
| << resource; |
| return false; |
| } |
| std::string registration_id = resource.substr(sizeof(kFtlResourcePrefix) - 1); |
| if (!base::Uuid::ParseLowercase(registration_id).is_valid()) { |
| LOG(ERROR) << "Signaling id contains an invalid registration id: " |
| << registration_id; |
| return false; |
| } |
| return true; |
| } |
| |
| } // namespace remoting |