##
##  ssss.spec -- OpenPKG RPM Package Specification
##  Copyright (c) 2000-2025 OpenPKG Project <http://openpkg.org/>
##
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##

#   package version
%define       V_ssss     0.5
%define       V_xmltoman 0.6

#   package information
Name:         ssss
Summary:      Shamir's Secret Sharing Scheme (SSSS)
URL:          http://www.point-at-infinity.org/ssss/
Vendor:       B. Poettering
Packager:     OpenPKG Project
Distribution: OpenPKG Community
Class:        EVAL
Group:        Cryptography
License:      GPL
Version:      %{V_ssss}
Release:      20190714

#   list of sources
Source0:      http://point-at-infinity.org/ssss/ssss-%{V_ssss}.tar.gz
Source1:      http://ftp.debian.org/debian/pool/main/x/xmltoman/xmltoman_%{V_xmltoman}.orig.tar.gz
Patch0:       ssss.patch

#   build information
BuildPreReq:  OpenPKG, openpkg >= 20160101, perl, perl-xml
PreReq:       OpenPKG, openpkg >= 20160101
BuildPreReq:  gmp
PreReq:       gmp

%description
    In cryptography, a secret sharing scheme is a method for
    distributing a secret amongst a group of participants, each of
    which is allocated a share of the secret. The secret can only be
    reconstructed when the shares are combined together; individual
    shares are of no use on their own. More formally, in a secret
    sharing scheme there is one dealer and n players. The dealer gives
    a secret to the players, but only when specific conditions are
    fulfilled. The dealer accomplishes this by giving each player a
    share in such a way that any group of t (for threshold) or more
    players can together reconstruct the secret but no group of less
    than t players can. Such a system is called a (t,n)-threshold
    scheme. A popular technique to implement threshold schemes uses
    polynomial interpolation ("Lagrange interpolation"). This method was
    invented by Adi Shamir in 1979. ssss(4) implements this.

%track
    prog ssss = {
        version   = %{V_ssss}
        url       = http://www.point-at-infinity.org/ssss/
        regex     = ssss-(__VER__)\.tar\.gz
    }
    prog ssss:xmltoman = {
        version   = %{V_xmltoman}
        url       = http://ftp.debian.org/debian/pool/main/x/xmltoman/
        regex     = xmltoman_(__VER__)\.orig\.tar\.gz
    }

%prep
    %setup -q
    mkdir xmltoman
    ( cd xmltoman && %{l_gzip} -d -c %{SOURCE1} | %{l_tar} xf - ) || exit $?
    %patch -p0

%build
    %{l_make} %{l_mflags} \
        CC="%{l_cc}" \
        CFLAGS="%{l_cflags -O}" \
        CPPFLAGS="%{l_cppflags} -DNOMLOCK" \
        LDFLAGS="%{l_ldflags}" \
        ssss-split
    %{l_prefix}/bin/perl \
        xmltoman/xmltoman \
        ssss.manpage.xml >ssss.1

%install
    %{l_shtool} mkdir -f -p -m 755 \
        $RPM_BUILD_ROOT%{l_prefix}/bin \
        $RPM_BUILD_ROOT%{l_prefix}/man/man1
    %{l_shtool} install -c -s -m 755 \
        ssss-split $RPM_BUILD_ROOT%{l_prefix}/bin/
    %{l_shtool} mkln \
        $RPM_BUILD_ROOT%{l_prefix}/bin/ssss-split \
        $RPM_BUILD_ROOT%{l_prefix}/bin/ssss-combine
    %{l_shtool} install -c -m 644 \
        ssss.1 $RPM_BUILD_ROOT%{l_prefix}/man/man1/
    %{l_rpmtool} files -v -ofiles -r$RPM_BUILD_ROOT %{l_files_std}

%files -f files

%clean

