secvec.cc

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/*
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Copyright (c) 2022, Stable Cloud Computing, Inc.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
 
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#include <crypto/secvec.h>
#include <gtest/gtest.h>
#include <iostream>
#include <fstream>
#include <util/fs.h>
 
using std::cout;
using std::endl;
using std::system_error;
using std::runtime_error;
using std::fstream;
using std::ofstream;
using std::ifstream;
using std::vector;
using std::string;
using std::ios;
using scc::crypto::SecVecChar;
using scc::crypto::SecVecUchar;
using fs = scc::util::Filesystem;
 
TEST(secure_vector_test, char_sanity)
{
    SecVecChar v;
    ASSERT_EQ(v.size(), 0);
    SecVecChar v2(10);
    ASSERT_EQ(v2.size(), 10);
    SecVecChar v3(10, '\1');
    ASSERT_EQ(v3.size(), 10);
    vector<char> t;
    for (unsigned i = 0; i < v3.size(); i++)        t.push_back('\1');
    for (unsigned i = 0; i < v3.size(); i++)        ASSERT_EQ(v3[i], t[i]);
 
    v3.resize(5);
    ASSERT_EQ(v3.size(), 5);
    t.resize(5);
    for (unsigned i = 0; i < v3.size(); i++)        ASSERT_EQ(v3[i], t[i]);
 
    v3.resize(10, '\2');
    ASSERT_EQ(v3.size(), 10);
    t.resize(10, '\2');
    for (unsigned i = 0; i < v3.size(); i++)        ASSERT_EQ(v3[i], t[i]);
 
    v3.clear();
    ASSERT_EQ(v3.size(), 0);
}
 
TEST(secure_vector_test, uchar_sanity)
{
    SecVecUchar v;
    ASSERT_EQ(v.size(), 0);
    SecVecUchar v2(10);
    ASSERT_EQ(v2.size(), 10);
    SecVecUchar v3(10, '\1');
    ASSERT_EQ(v3.size(), 10);
    vector<unsigned char> t;
    for (unsigned i = 0; i < v3.size(); i++)        t.push_back('\1');
    for (unsigned i = 0; i < v3.size(); i++)        ASSERT_EQ(v3[i], t[i]);
 
    v3.resize(5);
    ASSERT_EQ(v3.size(), 5);
    t.resize(5);
    for (unsigned i = 0; i < v3.size(); i++)        ASSERT_EQ(v3[i], t[i]);
 
    v3.resize(10, '\2');
    ASSERT_EQ(v3.size(), 10);
    t.resize(10, '\2');
    for (unsigned i = 0; i < v3.size(); i++)        ASSERT_EQ(v3[i], t[i]);
 
    v3.clear();
    ASSERT_EQ(v3.size(), 0);
}
 
static string plaintext = "\
To be, or not to be, that is the question: \n\
Whether 'tis nobler in the mind to suffer \n\
The slings and arrows of outrageous fortune, \n\
Or to take Arms against a Sea of troubles, \n\
And by opposing end them: to die, to sleep; \n\
No more; and by a sleep, to say we end \n\
The heart-ache, and the thousand natural shocks \n\
That Flesh is heir to? 'Tis a consummation \n\
Devoutly to be wished. To die, to sleep, \n\
perchance to Dream; aye, there's the rub...\n";
 
struct SecVecCharTest : public testing::Test
{
    string fname;
    string tname;
    SecVecChar plainsv;
 
    SecVecCharTest() : fname("testfile.txt"), tname("testfile2.txt")
    {
        ofstream file(fname, ios::out|ios::trunc);
        
        if (!file.is_open())
        {
            throw runtime_error("could not open for writing");
        }
 
        file << plaintext;
        file.flush();
        file.close();
 
        for (auto ch : plaintext)
        {
            plainsv.push_back(ch);
        }
    }
    virtual ~SecVecCharTest()
    {
        system_error err;
        fs::remove(fname, &err);
        fs::remove(tname, &err);
    }
};
 
TEST_F(SecVecCharTest, read_from_file)
{
    SecVecChar sv;
    ifstream f(fname);
    f >> sv;
 
    string ver(sv.begin(), sv.end());
 
    cout << "<start plaintext>";
    cout << ver;
    cout << "<end plaintext>" << endl;
 
    ASSERT_EQ(plaintext, ver);
    ASSERT_EQ(plainsv, sv);
}
 
TEST_F(SecVecCharTest, write_to_file)
{
    ofstream file(tname);
 
    file << plainsv;
    file.close();
 
    ifstream t(tname);
    string s;
    char ch;
    while (t.get(ch))
    {
        s.push_back(ch);
    }
    ASSERT_EQ(s, plaintext);
}
 
TEST_F(SecVecCharTest, bad_read)
{
    ifstream f("nothere");
    SecVecChar sv;
    ASSERT_THROW(f >> sv, runtime_error);
}
 
TEST_F(SecVecCharTest, bad_write)
{
    fstream file(fname, ios::in);       // open read only
    if (!file.is_open())
    {
        throw runtime_error("could not open test file for reading");
    }
 
    ASSERT_THROW(file << plainsv, runtime_error);
}