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