52 lines
1.3 KiB
D
52 lines
1.3 KiB
D
module cipher;
|
|
|
|
private import std.range : isInputRange, isForwardRange, ElementType, InputRange, ForwardRange, inputRangeObject;
|
|
private import std.string : format;
|
|
|
|
private import salsa20;
|
|
private import chacha20;
|
|
|
|
public:
|
|
|
|
enum Cipher
|
|
{
|
|
salsa20,
|
|
chacha20
|
|
}
|
|
|
|
mixin(cipherFunctionString.format(q{InputRange},
|
|
q{isInputRange!R && !(isForwardRange!R)}));
|
|
|
|
mixin(cipherFunctionString.format(q{ForwardRange},
|
|
q{isForwardRange!R}));
|
|
|
|
unittest
|
|
{
|
|
import std.array;
|
|
|
|
ubyte[32] key;
|
|
ubyte[8] nonce;
|
|
ubyte[] a = [1, 2, 3];
|
|
auto b = a.cipherFunction(key, nonce, Cipher.salsa20);
|
|
InputRange!ubyte c = a.inputRangeObject;
|
|
auto d = c.cipherFunction(key, nonce, Cipher.salsa20);
|
|
|
|
static assert(isForwardRange!(typeof(b)));
|
|
static assert(isInputRange!(typeof(d)) && !(isForwardRange!(typeof(d))));
|
|
}
|
|
|
|
private:
|
|
|
|
enum cipherFunctionString = q{
|
|
%s!(ElementType!R) cipherFunction(R)(R range, ubyte[32] key, ubyte[8] nonce, Cipher cipher)
|
|
if (is(ElementType!R : ubyte) && %s)
|
|
{
|
|
final switch (cipher)
|
|
{
|
|
case Cipher.salsa20:
|
|
return range.salsa20Cipher(key, nonce).inputRangeObject;
|
|
case Cipher.chacha20:
|
|
return range.chacha20Cipher(key, nonce).inputRangeObject;
|
|
}
|
|
}
|
|
};
|