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/*
* Copyright (c) 2000 - 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
/*
* @file socket-2-id.cpp
* @author Bartlomiej Grzelewski (b.grzelewski@samsung.com)
* @version 1.0
*/
#include <sys/smack.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <security-manager.h>
#include <dpl/log/log.h>
#include <protocols.h>
#include <socket-2-id.h>
namespace CKM {
namespace {
int getPkgIdFromSocket(int sock, std::string &pkgId)
{
char *pkg = nullptr;
int ret = security_manager_identify_app_from_socket(sock, &pkg, nullptr);
if (ret == SECURITY_MANAGER_ERROR_NO_SUCH_OBJECT) {
LogInfo("Owner of socket is not connected with pkgid. "
"This case must be special-labled client. e.g. User, System");
return 1;
}
if (ret != SECURITY_MANAGER_SUCCESS) {
LogError("security_manager_identify_app_from_socket failed with error: "
<< ret);
return -1;
}
pkgId = pkg;
free(pkg);
LogDebug("Socket: " << sock << " Was translated to owner id: " << pkgId);
return 0;
}
int assignToString(std::vector<char> &vec, socklen_t len, std::string &res)
{
if (vec.size() <= len)
return -1;
vec[len] =
0; // old implementation getsockopt returns cstring without 0
if (vec[len - 1] == 0)
--len; // new implementation of getsockopt returns cstring size+1
res.assign(vec.data(), len);
return 0;
}
} // namespace anonymous
int Socket2Id::getCredentialsFromSocket(int sock, std::string &res)
{
std::vector<char> result(SMACK_LABEL_LEN + 1);
socklen_t length = SMACK_LABEL_LEN;
if (0 == getsockopt(sock, SOL_SOCKET, SO_PEERSEC, result.data(), &length))
return assignToString(result, length, res);
if (errno != ERANGE) {
LogError("getsockopt failed");
return -1;
}
result.resize(length + 1);
if (0 > getsockopt(sock, SOL_SOCKET, SO_PEERSEC, result.data(), &length)) {
LogError("getsockopt failed with errno: " << errno);
return -1;
}
return assignToString(result, length, res);
}
void Socket2Id::mapToDomainClient(std::string &pkgId)
{
static const std::string subdomainSep = "::";
static const auto systemClientLen = strlen(CLIENT_ID_SYSTEM);
if (pkgId.length() > systemClientLen + subdomainSep.length() &&
pkgId.compare(0, systemClientLen, CLIENT_ID_SYSTEM) == 0 &&
pkgId.compare(systemClientLen, subdomainSep.length(), subdomainSep) == 0) {
pkgId = CLIENT_ID_SYSTEM;
}
}
void Socket2Id::resetCache()
{
m_stringMap.clear();
}
int Socket2Id::translate(int sock, std::string &result)
{
std::string smack;
if (0 > getCredentialsFromSocket(sock, smack))
return -1;
StringMap::iterator it = m_stringMap.find(smack);
if (it != m_stringMap.end()) {
result = it->second;
return 0;
}
std::string pkgId;
int retCode = getPkgIdFromSocket(sock, pkgId);
if (retCode < 0)
return -1;
if (retCode == 1) {
LogInfo("Special smack label case. label: " << smack);
pkgId = "/" + smack;
}
mapToDomainClient(pkgId);
result = pkgId;
m_stringMap.emplace(std::move(smack), std::move(pkgId));
return 0;
}
} // namespace CKM
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