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libgourou/include/libgourou_common.h

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/*
Copyright 2021 Grégory Soutadé
This file is part of libgourou.
libgourou is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libgourou is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with libgourou. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _LIBGOUROU_COMMON_H_
#define _LIBGOUROU_COMMON_H_
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <pugixml.hpp>
#include <exception>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <algorithm>
#include <string.h>
#include <libgourou_log.h>
#include "bytearray.h"
namespace gourou
{
/**
* Some common utilities
*/
#define ADOBE_ADEPT_NS "http://ns.adobe.com/adept"
static const int SHA1_LEN = 20;
static const int RSA_KEY_SIZE = 128;
static const int RSA_KEY_SIZE_BITS = (RSA_KEY_SIZE*8);
enum GOUROU_ERROR {
GOUROU_DEVICE_DOES_NOT_MATCH = 0x1000,
GOUROU_INVALID_CLIENT,
GOUROU_TAG_NOT_FOUND,
GOUROU_ADEPT_ERROR,
GOUROU_FILE_ERROR
};
enum FULFILL_ERROR {
FF_ACSM_FILE_NOT_EXISTS = 0x1100,
FF_INVALID_ACSM_FILE,
FF_NO_HMAC_IN_ACSM_FILE,
FF_NOT_ACTIVATED,
FF_NO_OPERATOR_URL
};
enum DOWNLOAD_ERROR {
DW_NO_ITEM = 0x1200,
DW_NO_EBX_HANDLER,
};
enum SIGNIN_ERROR {
SIGN_INVALID_CREDENTIALS = 0x1300,
};
enum ACTIVATE_ERROR {
ACTIVATE_NOT_SIGNEDIN = 0x1400
};
enum DEV_ERROR {
DEV_MKPATH = 0x2000,
DEV_MAC_ERROR,
DEV_INVALID_DEVICE_FILE,
DEV_INVALID_DEVICE_KEY_FILE,
DEV_INVALID_DEV_PROPERTY,
};
enum USER_ERROR {
USER_MKPATH = 0x3000,
USER_INVALID_ACTIVATION_FILE,
USER_NO_AUTHENTICATION_URL,
USER_NO_PROPERTY,
};
enum FULFILL_ITEM_ERROR {
FFI_INVALID_FULFILLMENT_DATA = 0x4000
};
enum CLIENT_ERROR {
CLIENT_BAD_PARAM = 0x5000,
CLIENT_INVALID_PKCS12,
CLIENT_INVALID_CERTIFICATE,
CLIENT_NO_PRIV_KEY,
CLIENT_RSA_ERROR,
CLIENT_BAD_CHAINING,
CLIENT_BAD_KEY_SIZE,
CLIENT_BAD_ZIP_FILE,
CLIENT_ZIP_ERROR,
CLIENT_GENERIC_EXCEPTION,
CLIENT_NETWORK_ERROR,
};
enum DRM_REMOVAL_ERROR {
CLIENT_DRM_ERR_ENCRYPTION_KEY = 0x6000,
CLIENT_DRM_FORMAT_NOT_SUPPORTED,
};
/**
* Generic exception class
*/
class Exception : public std::exception
{
public:
Exception(int code, const char* message, const char* file, int line):
code(code), line(line), file(file)
{
std::stringstream msg;
msg << "Exception code : 0x" << std::setbase(16) << code << std::endl;
msg << "Message : " << message << std::endl;
if (logLevel >= DEBUG)
msg << "File : " << file << ":" << std::setbase(10) << line << std::endl;
fullmessage = strdup(msg.str().c_str());
}
Exception(const Exception& other)
{
this->code = other.code;
this->line = line;
this->file = file;
this->fullmessage = strdup(other.fullmessage);
}
~Exception()
{
free(fullmessage);
}
const char * what () const throw () { return fullmessage; }
int getErrorCode() {return code;}
private:
int code, line;
const char* message, *file;
char* fullmessage;
};
/**
* @brief Throw an exception
*/
#define EXCEPTION(code, message) \
{std::stringstream __msg;__msg << message; throw gourou::Exception(code, __msg.str().c_str(), __FILE__, __LINE__);}
/**
* Stream writer for pugi::xml
*/
class StringXMLWriter : public pugi::xml_writer
{
public:
virtual void write(const void* data, size_t size)
{
result.append(static_cast<const char*>(data), size);
}
const std::string& getResult() {return result;}
private:
std::string result;
};
static const char* ws = " \t\n\r\f\v";
/**
* @brief trim from end of string (right)
*/
inline std::string& rtrim(std::string& s, const char* t = ws)
{
s.erase(s.find_last_not_of(t) + 1);
return s;
}
/**
* @brief trim from beginning of string (left)
*/
inline std::string& ltrim(std::string& s, const char* t = ws)
{
s.erase(0, s.find_first_not_of(t));
return s;
}
/**
* @brief trim from both ends of string (right then left)
*/
inline std::string& trim(std::string& s, const char* t = ws)
{
return ltrim(rtrim(s, t), t);
}
/**
* @brief Extract text node from tag in document
* It can throw an exception if tag does not exists
* or just return an empty value
*/
static inline std::string extractTextElem(const pugi::xml_document& doc, const char* tagName, bool throwOnNull=true)
{
pugi::xpath_node xpath_node = doc.select_node(tagName);
if (!xpath_node)
{
if (throwOnNull)
EXCEPTION(GOUROU_TAG_NOT_FOUND, "Tag " << tagName << " not found");
return "";
}
pugi::xml_node node = xpath_node.node().first_child();
if (!node)
{
if (throwOnNull)
EXCEPTION(GOUROU_TAG_NOT_FOUND, "Text element for tag " << tagName << " not found");
return "";
}
std::string res = node.value();
return trim(res);
}
static inline std::string extractTextElem(const pugi::xml_node& doc, const char* tagName, bool throwOnNull=true)
{
pugi::xpath_node xpath_node = doc.select_node(tagName);
if (!xpath_node)
{
if (throwOnNull)
EXCEPTION(GOUROU_TAG_NOT_FOUND, "Tag " << tagName << " not found");
return "";
}
pugi::xml_node node = xpath_node.node().first_child();
if (!node)
{
if (throwOnNull)
EXCEPTION(GOUROU_TAG_NOT_FOUND, "Text element for tag " << tagName << " not found");
return "";
}
std::string res = node.value();
return trim(res);
}
/**
* @brief Append an element to root with a sub text element
*
* @param root Root node where to put child
* @param name Tag name for child
* @param value Text child value of tag element
*/
static inline void appendTextElem(pugi::xml_node& root, const std::string& name, const std::string& value)
{
pugi::xml_node node = root.append_child(name.c_str());
node.append_child(pugi::node_pcdata).set_value(value.c_str());
}
/**
* @brief Write data in a file. If it already exists, it's truncated
*/
static inline void writeFile(std::string path, const unsigned char* data, unsigned int length)
{
int fd = open(path.c_str(), O_CREAT|O_WRONLY|O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH);
if (fd <= 0)
EXCEPTION(GOUROU_FILE_ERROR, "Unable to create " << path);
if (write(fd, data, length) != length)
EXCEPTION(GOUROU_FILE_ERROR, "Write error for file " << path);
close (fd);
}
/**
* @brief Write data in a file. If it already exists, it's truncated
*/
static inline void writeFile(std::string path, ByteArray& data)
{
writeFile(path, data.data(), data.length());
}
/**
* @brief Write data in a file. If it already exists, it's truncated
*/
static inline void writeFile(std::string path, const std::string& data)
{
writeFile(path, (const unsigned char*)data.c_str(), data.length());
}
/**
* Read data from file
*/
static inline void readFile(std::string path, const unsigned char* data, unsigned int length)
{
int fd = open(path.c_str(), O_RDONLY);
if (fd <= 0)
EXCEPTION(GOUROU_FILE_ERROR, "Unable to open " << path);
if (read(fd, (void*)data, length) != length)
EXCEPTION(GOUROU_FILE_ERROR, "Read error for file " << path);
close (fd);
}
#define PATH_MAX_STRING_SIZE 256
// https://gist.github.com/ChisholmKyle/0cbedcd3e64132243a39
/* recursive mkdir */
static inline int mkdir_p(const char *dir, const mode_t mode) {
char tmp[PATH_MAX_STRING_SIZE];
char *p = NULL;
struct stat sb;
size_t len;
/* copy path */
len = strnlen (dir, PATH_MAX_STRING_SIZE);
if (len == 0 || len == PATH_MAX_STRING_SIZE) {
return -1;
}
memcpy (tmp, dir, len);
tmp[len] = '\0';
/* remove trailing slash */
if(tmp[len - 1] == '/') {
tmp[len - 1] = '\0';
}
/* check if path exists and is a directory */
if (stat (tmp, &sb) == 0) {
if (S_ISDIR (sb.st_mode)) {
return 0;
}
}
/* recursive mkdir */
for(p = tmp + 1; *p; p++) {
if(*p == '/') {
*p = 0;
/* test path */
if (stat(tmp, &sb) != 0) {
/* path does not exist - create directory */
if (mkdir(tmp, mode) < 0) {
return -1;
}
} else if (!S_ISDIR(sb.st_mode)) {
/* not a directory */
return -1;
}
*p = '/';
}
}
/* test path */
if (stat(tmp, &sb) != 0) {
/* path does not exist - create directory */
if (mkdir(tmp, mode) < 0) {
return -1;
}
} else if (!S_ISDIR(sb.st_mode)) {
/* not a directory */
return -1;
}
return 0;
}
}
#endif
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