CWE-ou-minkata/Sources/Plasma/Apps/plFileSecure/main.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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it under the terms of the GNU General Public License as published by
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Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/
#include "plFile/plSecureStream.h"
#include "plProduct.h"


#include <ctime>
#include <string>
#include <algorithm>

void print_version() {
    puts(plProduct::ProductString().c_str());
    puts("");
}

void print_help() {
    puts  ("plFileSecure - Secures Uru files and generates encryption.key files.\n");
    print_version();
    puts  ("Usage:");
    puts  ("\tplFileSecure (<directory> <ext>)|[/generate /default]");
    puts  ("");
    puts  ("<directory> <ext>    : The directory and extension of files to secure. Cannot");
    printf("                       be used with /generate. Uses the %s file in\n", plSecureStream::kKeyFilename);
    puts  ("                       the current directory (or default key if no file exists)");
    printf("/generate            : Generates a random key and writes it to a %s\n", plSecureStream::kKeyFilename);
    puts  ("                       file in the current directory. Cannot be used with");
    puts  ("                       <directory> <ext>");
    printf("/default             : If used with /generate, creates a %s file\n", plSecureStream::kKeyFilename);
    puts  ("                       with the default key. If used with <directory> <ext>, it");
    puts  ("                       secures with the default key instead of the");
    printf("                       %s file's key\n", plSecureStream::kKeyFilename);
    puts  ("");
}

void GenerateKey(bool useDefault)
{
    uint32_t key[4];
    if (useDefault)
    {
        unsigned memSize = std::min(arrsize(key), arrsize(plSecureStream::kDefaultKey));
        memSize *= sizeof(uint32_t);
        memcpy(key, plSecureStream::kDefaultKey, memSize);
    }
    else
    {
        srand((unsigned)time(nil));
        double randNum = (double)rand() / (double)RAND_MAX; // converts to 0..1
        uint32_t keyNum = (uint32_t)(randNum * (double)0xFFFFFFFF); // multiply it by the max unsigned 32-bit int
        key[0] = keyNum;

        randNum = (double)rand() / (double)RAND_MAX;
        keyNum = (uint32_t)(randNum * (double)0xFFFFFFFF);
        key[1] = keyNum;

        randNum = (double)rand() / (double)RAND_MAX;
        keyNum = (uint32_t)(randNum * (double)0xFFFFFFFF);
        key[2] = keyNum;

        randNum = (double)rand() / (double)RAND_MAX;
        keyNum = (uint32_t)(randNum * (double)0xFFFFFFFF);
        key[3] = keyNum;
    }

    hsUNIXStream out;
    out.Open(plSecureStream::kKeyFilename, "wb");
    out.Write(sizeof(uint32_t) * arrsize(key), (void*)key);
    out.Close();
}

void SecureFiles(const plFileName& dir, const plString& ext, uint32_t* key)
{
    std::vector<plFileName> files = plFileSystem::ListDir(dir, ext.c_str());
    for (auto iter = files.begin(); iter != files.end(); ++iter)
    {
        plPrintf("securing: {}\n", iter->GetFileName());
        plSecureStream::FileEncrypt(*iter, key);
    }
}

int main(int argc, char *argv[])
{
    bool generatingKey = false;
    bool useDefault = false;
    plFileName directory;
    plString ext;

    if (argc > 1)
    {
        for (int i = 1; i < argc; i++)
        {
            std::string arg = argv[i];
            if ((arg[0] == '-')||(arg[0] == '/'))
            {
                // this arg is a flag of some kind
                arg = arg.substr(1, arg.length()); // trim the dash or slash
                if ((stricmp(arg.c_str(), "g") == 0) || (stricmp(arg.c_str(), "generate") == 0))
                {
                    if (!generatingKey)
                        generatingKey = true;
                    else
                    {
                        print_help();
                        return 0;
                    }
                }
                else if ((stricmp(arg.c_str(), "d") == 0) || (stricmp(arg.c_str(), "default") == 0))
                {
                    if (!useDefault)
                        useDefault = true;
                    else
                    {
                        print_help();
                        return 0;
                    }
                }
                else
                {
                    print_help();
                    return 0;
                }
            }
            else
            {
                // else it is a directory or extension
                if (!directory.IsValid())
                    directory = argv[i];
                else if (ext.IsEmpty())
                    ext = argv[i];
                else
                {
                    print_help();
                    return 0;
                }
            }
        }

        if (generatingKey && ((directory.IsValid()) || (!ext.IsEmpty())))
        {
            print_help();
            return 0;
        }
    }
    else
    {
        print_help();
        return 0;
    }

    if (generatingKey)
    {
        GenerateKey(useDefault);
        return 0;
    }

    // Make sure ext is a real pattern, or we won't find anything
    if (ext.CharAt(0) == '.')
        ext = "*" + ext;
    else if (ext.CharAt(0) != '*')
        ext = "*." + ext;

    if (useDefault)
        SecureFiles(directory, ext, nil);
    else
    {
        uint32_t key[4];
        plSecureStream::GetSecureEncryptionKey(plSecureStream::kKeyFilename, key, arrsize(key));
        SecureFiles(directory, ext, key);
    }
    return 0;
}