blob: be9d04fa54d465eb55f04567b73b9847ecceeca7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
// Copyright 2005-2020 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#include <QtCore>
#include <QtTest>
#include "SSL.h"
#include "CryptographicRandom.h"
#include <stdint.h>
#include <stdlib.h>
#include <limits>
class TestCryptographicRandom : public QObject {
Q_OBJECT
private slots:
void initTestCase();
void cleanupTestCase();
void fillBuffer();
void uint32();
void uniform();
};
void TestCryptographicRandom::initTestCase() {
MumbleSSL::initialize();
}
void TestCryptographicRandom::cleanupTestCase() {
MumbleSSL::destroy();
}
// Verify the entropy of the data returned by the random source
// by zlib compressing it and ensuring the compressed size is at
// least 99% of the size of the input data.
//
// The inspiration for this check is from the rand_test.go file
// for Go standard library's crypt/rand package:
// https://golang.org/src/crypto/rand/rand_test.go
bool verifyEntropy(unsigned char *buf, int len) {
QByteArray flated = qCompress(buf, len);
return (flated.size() >= ((len * 99) / 100));
}
void TestCryptographicRandom::fillBuffer() {
const int buflen = 1000000;
for (int i = 0; i < 10; i++) {
unsigned char *buf = reinterpret_cast<unsigned char *>(calloc(buflen, 1));
CryptographicRandom::fillBuffer(buf, buflen);
QVERIFY(verifyEntropy(buf, buflen));
free(buf);
}
}
void TestCryptographicRandom::uint32() {
const int buflen = 1000000;
for (int i = 0; i < 10; i++) {
unsigned char *buf = reinterpret_cast<unsigned char *>(calloc(buflen, 1));
int niter = buflen / sizeof(uint32_t);
for (int j = 0; j < niter; j++) {
int off = j * sizeof(uint32_t);
uint32_t val = CryptographicRandom::uint32();
buf[off] = val & 0xff;
buf[off+1] = (val >> 8) & 0xff;
buf[off+2] = (val >> 16) & 0xff;
buf[off+3] = (val >> 24) & 0xff;
}
QVERIFY(verifyEntropy(buf, buflen));
free(buf);
}
}
void TestCryptographicRandom::uniform() {
for (uint32_t upperBound = 0; upperBound < 10000; upperBound++) {
uint32_t val = CryptographicRandom::uniform(upperBound);
QVERIFY(val <= upperBound);
}
}
QTEST_MAIN(TestCryptographicRandom)
#include "TestCryptographicRandom.moc"
|
