RSA lib cannot find libgmp.so

[hcaihao]

local rsa = require "resty.nettle.rsa"

Cause error:

msg : /usr/local/openresty/lualib/resty/nettle/mpz.lua:11: libgmp.so: cannot open shared object file: No such file or directory

Centos 6.5 + nettle 3.3 + lua-resty-nettle 0.98

[hcaihao]

After I execute

ln -s /usr/local/lib64/libgmp.so.3 /lib64

New error shows:

msg : libhogweed.so: cannot open shared object file: No such file or directory

I find no libhogweed.so file in my system. After I download libhogweed.so file from Internet to lib64 folder, a new file missing again...

msg : libgmp.so.10: cannot open shared object file: No such file or directory

[hcaihao]

The cmd to install nettle:

wget https://ftp.gnu.org/gnu/nettle/nettle-3.3.tar.gz
tar zxf nettle-3.3.tar.gz && cd nettle-3.3
./configure
make
make install
ln -s /usr/local/lib64/libnettle.so  /lib64

[bungle]

A little bit about dependencies:

Nettle (https://www.lysator.liu.se/~nisse/nettle/) is divided to two libraries: libnettle and libhogweed. Both come with the same sources (or install). libnettle does not have any external dependencies, but libhogweed does depend on GMP (https://gmplib.org/).

Both Nettle and GMP are usually generally available in your operating system packages, e.g.:

macOS:

brew install gmp
brew install nettle

Ubuntu:

sudo apt install libgmp10
sudo apt install libnettle6
sudo apt install libhogweed4

And you can build it from the sources as well. Please make sure you add the libraries in your system library path (not the package.cpath). But it is your responsibility to make sure that you have the required dependencies (and correct versions of them).

And to let you know, I just released a new version 0.99 that contains a bit more robust library loading: https://github.com/bungle/lua-resty-nettle/commit/15ed9f5c4af6dfd5063c7c9bff31a921ed0c21bf

Let me know if that helps.

[bungle]

libhogweed comes with Nettle sources. When you build Nettle it will produce two libraries: libnettle and libhogweed.

[hcaihao]

Thank you! After I install gmp-6.1.2 and update glibc to 2.14, the "resty.nettle.rsa" lib load successfully.

But when I run the sample code, I got a new error:

    local rsa = require "resty.nettle.rsa"
    local hex = require "resty.nettle.base16"
    local kp = rsa.keypair.new()
    ngx.say(hex.encode(kp.sexp))
    kp:clear()

attempt to call method 'clear' (a nil value)

[hcaihao]

Another question: How to en/decrypt using my given n/p/q/d/e?

--decimal

n("100888004757403126382886865105241158432730176062295033309000746455988298951828966091095481424873115498597115470207409736120641179528187079237478715189605733459515461116155773704429850150652890842508460527885968744169102941134604514003901153455056079756503035208208397983837095373331913496470006600336138889979");

p("10037193205433537850159355577976209042329445854157281393122190492869599322079147267686871580259251400550761763461564161492285436114129538845695257619405147");

q("10051416037581938434241420294098997568255976738842428014184520954485803895241198438012218427444035054914650416633597255584935142918297111815841382589957857");

d("5934588515141360375463933241484774025454716238958531371117690967999311703048762711240910672051359735211595027659259396242390657619305122308086983246447394904170954005922322900214939886790957662181521619304503613968097387395963952568129144374414610380591033517413429577789412832514875357048196768452701736881");

e("17");

[bungle]

@hcaihao yes, no need to call clear (it doesn't exist anymore in API), it was removed as it is called automatically on GC.