nixpkgs/pkgs/tools/security/hashcash/default.nix

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{ stdenv, fetchurl, openssl }:
stdenv.mkDerivation rec {
name = "hashcash-${version}";
version = "1.22";
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buildInputs = [ openssl ];
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src = fetchurl {
url = "http://www.hashcash.org/source/hashcash-1.22.tgz";
sha256 = "15kqaimwb2y8wvzpn73021bvay9mz1gqqfc40gk4hj6f84nz34h1";
};
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makeFlags = "generic-openssl LIBCRYPTO=-lcrypto";
installPhase = ''
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install -D -m 0755 --target $out/bin hashcash sha1
install -D -m 0444 hashcash.1 $out/share/man/man1/hashcash.1
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'';
meta = with stdenv.lib; {
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description = "Proof-of-work algorithm used as spam and denial-of-service counter measure";
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homepage = http://hashcash.org;
license = licenses.gpl2;
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maintainers = with maintainers; [ kisonecat ];
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};
}