Playfair cipher: Difference between revisions
Content deleted Content added
m Category:Encryption |
Updated D entry |
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{{trans|Python}} |
{{trans|Python}} |
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<lang d>import std.stdio, std.array, std.algorithm, std.range, std.ascii, |
<lang d>import std.stdio, std.array, std.algorithm, std.range, std.ascii, |
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std.conv, std.string, std.regex; |
std.conv, std.string, std.regex, std.typecons; |
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string unique(in string s) pure nothrow @safe { |
string unique(in string s) pure nothrow @safe { |
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enc[[m[i1][j1], m[i2][j2]]] = [m[i1][j2], m[i2][j1]]; |
enc[[m[i1][j1], m[i2][j2]]] = [m[i1][j2], m[i2][j1]]; |
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dec = enc. |
dec = enc.byKeyValue.map!(t => tuple(t.value, t.key)).assocArray; |
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} |
} |
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private string _canonicalize(in string s) const pure |
private string _canonicalize(in string s) const pure @safe { |
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return s.toUpper.removechars("^A-Z").replace(from, to); |
return s.toUpper.removechars("^A-Z").replace(from, to); |
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} |
} |
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.matchAll(r"(.)(?:(?!\1)(.))?") |
.matchAll(r"(.)(?:(?!\1)(.))?") |
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.map!(m => enc[m[0].leftJustify(2, 'X')]) |
.map!(m => enc[m[0].leftJustify(2, 'X')]) |
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.join( |
.join(' '); |
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} |
} |
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string decode(in string s) const |
string decode(in string s) const pure @safe { |
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return _canonicalize(s).chunks(2).map!(p => dec[p.text]).join( |
return _canonicalize(s).chunks(2).map!(p => dec[p.text]).join(' '); |
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} |
} |
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} |
} |
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void main() { |
void main() /*@safe*/ { |
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/*immutable*/ const pf = Playfair("Playfair example"); |
/*immutable*/ const pf = Playfair("Playfair example"); |
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immutable orig = "Hide the gold in...the TREESTUMP!!!"; |
immutable orig = "Hide the gold in...the TREESTUMP!!!"; |
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