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73 Zeilen
1.7 KiB
73 Zeilen
1.7 KiB
#include <iostream>
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#include <string>
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#include <vector>
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#include <fstream>
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#include <sstream>
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#include <assert.h>
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std::string load_file(std::string filename, size_t end_cut = 0)
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{
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std::stringstream ret;
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std::ifstream file(filename);
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while(file.good())
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{
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ret<<(char)file.get();
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}
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auto rret = ret.str();
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rret.resize(rret.size()-end_cut);
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return rret;
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}
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int main(int argc, char** argv)
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{
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std::vector<std::string> params;
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for(int i=0;i<argc;i++)
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{
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params.push_back(std::string(argv[i]));
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}
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if(params.size()==2)
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{
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auto ciphertext = load_file(params[1],4);
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int jumper=0;
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bool is_okay = true;
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do{
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is_okay=true;
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for(size_t idx=0;idx<ciphertext.size();idx++)
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{
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if(!isgraph((char)(ciphertext[idx]-jumper+idx)))
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{
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is_okay=false;
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jumper++;
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}
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}
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}while((!is_okay) && jumper<=256);
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if(is_okay)
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{
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for(size_t idx=0;idx<ciphertext.size();idx++)
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{
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std::cout<<(char)(ciphertext[idx]-jumper+idx);
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}
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}else{
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std::cout<<"Unable to find a valid representation"<<std::endl;
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}
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}
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else if(params.size()==3)
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{
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auto ciphertext = load_file(params[1],4);
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auto zeroed = load_file(params[2],4);
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assert(ciphertext.size()==zeroed.size());
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for(size_t idx=0;idx<ciphertext.size();idx++)
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{
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std::cout<<(char)(ciphertext[idx]-zeroed[idx]);
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}
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}
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else
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{
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std::cout<<
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"codebreak 0.1.0\n"
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"usage:\n"
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"codebreak encrypted_file [0ed_ciphertext]"
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<<std::endl;
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}
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}
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