mirror of
https://github.com/SebastianWendel/nixpkgs.git
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03d69128b2
> Include multiple versions of certain functions in the library, > and select the ones to use at run-time, depending on available > processor features. Supported for ARM and x86_64. The current version seems to accelerate AES and SHA families. Size increase on x86_64 is <10k in our case. It can make quite some performance difference; I tried $ time ./result-dev/bin/nettle-hash -a sha256 /some/file/around/2G And the total CPU time went down from 8.5s to 2s (single thread). Now it matches the time of openssl $ time openssl sha256 /some/file/around/2G Of course, in real life it will be much harder to notice a difference... Platforms without support for this (e.g. i686) seem to still build fine, and ARMv7 cross-build also succeeds for me, so hopefully all is OK.
71 lines
2.3 KiB
Nix
71 lines
2.3 KiB
Nix
{ stdenv, buildPackages, gmp, gnum4
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# Version specific args
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, version, src
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, ...}:
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stdenv.mkDerivation ({
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name = "nettle-${version}";
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inherit src;
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outputs = [ "out" "dev" ];
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outputBin = "dev";
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depsBuildBuild = [ buildPackages.stdenv.cc ];
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nativeBuildInputs = [ gnum4 ];
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propagatedBuildInputs = [ gmp ];
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configureFlags = [ "--enable-fat" ]; # runtime selection of HW-accelerated code
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doCheck = (stdenv.hostPlatform.system != "i686-cygwin" && !stdenv.isDarwin);
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enableParallelBuilding = true;
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patches = stdenv.lib.optional (stdenv.hostPlatform.system == "i686-cygwin")
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./cygwin.patch;
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meta = with stdenv.lib; {
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description = "Cryptographic library";
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longDescription = ''
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Nettle is a cryptographic library that is designed to fit
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easily in more or less any context: In crypto toolkits for
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object-oriented languages (C++, Python, Pike, ...), in
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applications like LSH or GNUPG, or even in kernel space. In
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most contexts, you need more than the basic cryptographic
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algorithms, you also need some way to keep track of available
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algorithms, their properties and variants. You often have
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some algorithm selection process, often dictated by a protocol
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you want to implement.
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And as the requirements of applications differ in subtle and
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not so subtle ways, an API that fits one application well can
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be a pain to use in a different context. And that is why
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there are so many different cryptographic libraries around.
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Nettle tries to avoid this problem by doing one thing, the
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low-level crypto stuff, and providing a simple but general
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interface to it. In particular, Nettle doesn't do algorithm
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selection. It doesn't do memory allocation. It doesn't do any
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I/O.
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'';
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license = licenses.gpl2Plus;
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homepage = http://www.lysator.liu.se/~nisse/nettle/;
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platforms = platforms.all;
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};
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}
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//
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stdenv.lib.optionalAttrs stdenv.isSunOS {
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# Make sure the right <gmp.h> is found, and not the incompatible
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# /usr/include/mp.h from OpenSolaris. See
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# <https://lists.gnu.org/archive/html/hydra-users/2012-08/msg00000.html>
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# for details.
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configureFlags = [ "--with-include-path=${gmp.dev}/include" ];
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})
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