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Add unittest for Linux random generator

This commit is contained in:
Eugen Wissner 2017-06-15 11:19:50 +02:00
parent 3789853d98
commit c62dc4063e
1 changed files with 34 additions and 18 deletions
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52
source/tanya/math/random.d
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@ -37,7 +37,7 @@ class EntropyException : Exception
this(string msg,
string file = __FILE__,
size_t line = __LINE__,
Throwable next = null) pure @safe nothrow const @nogc
Throwable next = null) const pure nothrow @safe @nogc
{
super(msg, file, line, next);
}
@ -54,17 +54,17 @@ abstract class EntropySource
/**
* Returns: Minimum bytes required from the entropy source.
*/
@property immutable(ubyte) threshold() const @safe pure nothrow;
@property ubyte threshold() const pure nothrow @safe @nogc;
/**
* Returns: Whether this entropy source is strong.
*/
@property immutable(bool) strong() const @safe pure nothrow;
@property bool strong() const pure nothrow @safe @nogc;
/**
* Returns: Amount of already generated entropy.
*/
@property ushort size() const @safe pure nothrow
@property ushort size() const pure nothrow @safe @nogc
{
return size_;
}
@ -74,7 +74,7 @@ abstract class EntropySource
* size = Amount of already generated entropy. Cannot be smaller than the
* already set value.
*/
@property void size(ushort size) @safe pure nothrow
@property void size(const ushort size) pure nothrow @nogc @safe
{
size_ = size;
}
@ -89,12 +89,12 @@ abstract class EntropySource
* Returns: Number of bytes that were copied to the $(D_PARAM output)
* or $(D_PSYMBOL Nullable!ubyte.init) on error.
*/
Nullable!ubyte poll(out ubyte[maxGather] output);
Nullable!ubyte poll(out ubyte[maxGather] output) @nogc;
}
version (linux)
{
extern (C) long syscall(long number, ...) nothrow;
extern (C) long syscall(long number, ...) nothrow @nogc;
/**
* Uses getrandom system call.
@ -104,7 +104,7 @@ version (linux)
/**
* Returns: Minimum bytes required from the entropy source.
*/
override @property immutable(ubyte) threshold() const @safe pure nothrow
override @property ubyte threshold() const pure nothrow @safe @nogc
{
return 32;
}
@ -112,7 +112,7 @@ version (linux)
/**
* Returns: Whether this entropy source is strong.
*/
override @property immutable(bool) strong() const @safe pure nothrow
override @property bool strong() const pure nothrow @safe @nogc
{
return true;
}
@ -127,7 +127,7 @@ version (linux)
* Returns: Number of bytes that were copied to the $(D_PARAM output)
* or $(D_PSYMBOL Nullable!ubyte.init) on error.
*/
override Nullable!ubyte poll(out ubyte[maxGather] output) nothrow
override Nullable!ubyte poll(out ubyte[maxGather] output) nothrow @nogc
out (length)
{
assert(length <= maxGather);
@ -145,6 +145,20 @@ version (linux)
return ret;
}
}
private @nogc unittest
{
auto entropy = defaultAllocator.make!Entropy();
assert(entropy.sourceCount == 1);
assert(entropy.sources[0].strong);
assert(entropy.sources[0].threshold == 32);
assert(entropy.sources[0].size == 0);
auto random = entropy.random;
defaultAllocator.dispose(entropy);
}
}
/**
@ -177,7 +191,8 @@ class Entropy
* allocator = Allocator to allocate entropy sources available on the
* system.
*/
this(size_t maxSources = 20, shared Allocator allocator = defaultAllocator)
this(const size_t maxSources = 20,
shared Allocator allocator = defaultAllocator) nothrow @nogc
in
{
assert(maxSources > 0 && maxSources <= ubyte.max);
@ -196,7 +211,7 @@ class Entropy
/**
* Returns: Amount of the registered entropy sources.
*/
@property ubyte sourceCount() const @safe pure nothrow
@property ubyte sourceCount() const pure nothrow @safe @nogc
{
return sourceCount_;
}
@ -212,7 +227,8 @@ class Entropy
* See_Also:
* $(D_PSYMBOL EntropySource)
*/
Entropy opOpAssign(string Op)(EntropySource source) @safe pure nothrow
Entropy opOpAssign(string Op)(EntropySource source)
pure nothrow @safe @nogc
if (Op == "~")
in
{
@ -230,7 +246,7 @@ class Entropy
* Throws: $(D_PSYMBOL EntropyException) if no strong entropy source was
* registered or it failed.
*/
@property ubyte[blockSize] random()
@property ubyte[blockSize] random() @nogc
in
{
assert(sourceCount_ > 0, "No entropy sources defined.");
@ -299,15 +315,15 @@ class Entropy
* data = Data got from the entropy source.
* length = Length of the received data.
*/
protected void update(in ubyte sourceId,
protected void update(const ubyte sourceId,
ref ubyte[maxGather] data,
ubyte length) @safe pure nothrow
ubyte length) pure nothrow @safe @nogc
{
ubyte[2] header;
if (length > blockSize)
{
data[0..64] = sha512Of(data);
data[0 .. 64] = sha512Of(data);
length = blockSize;
}
@ -315,6 +331,6 @@ class Entropy
header[1] = length;
accumulator.put(header);
accumulator.put(data[0..length]);
accumulator.put(data[0 .. length]);
}
}