Standard curves and curve checking.

[u/mdw/catacomb] / ec-gentab.sh

#! /bin/sh

set -e

cat <<EOF
/* -*-c-*-
 *
 * Table of standard elliptic curves [generated]
 */

#include "ectab.h"

#define N(x) (sizeof(x)/sizeof(*x))

/*----- Curve data --------------------------------------------------------*/

EOF

names=""
while read t n f; do

  case $t in
    curve) ;;
    alias) names="$names $n=$f" continue;;
    \#* | "") continue;;
    *) echo >&2 "$0: unknown keyword $t"; exit 1;;
  esac

  names="$names $n=$n"
  cat <<EOF
/* --- Curve $n --- */

EOF

  n=`echo $n | sed 's/[^a-zA-Z0-9_][^a-zA-Z0-9_]*/_/g'`
  case $f in
    prime | niceprime | binpoly)
      read t p;
      if [ $t != p ]; then echo >&2 "$0: wanted p; found $t"; exit 1; fi
      read t a
      if [ $t != a ]; then echo >&2 "$0: wanted a; found $t"; exit 1; fi
      read t b
      if [ $t != b ]; then echo >&2 "$0: wanted b; found $t"; exit 1; fi

      cat <<EOF
static const mpw c_${n}_p[] = {
EOF
      ./mpdump $p
      cat <<EOF
};

static const mpw c_${n}_a[] = {
EOF
      ./mpdump $a
      cat <<EOF
};

static const mpw c_${n}_b[] = {
EOF
      ./mpdump $b
      cat <<EOF
};

EOF
      ;;
    *) echo >&2 "$0: unknown field type $f"; exit 1;;
  esac

  read t r
  if [ $t != r ]; then echo >&2 "$0: wanted r; found $t"; exit 1; fi
  read t h
  if [ $t != h ]; then echo >&2 "$0: wanted h; found $t"; exit 1; fi
  read t gx
  if [ $t != gx ]; then echo >&2 "$0: wanted gx; found $t"; exit 1; fi
  read t gy
  if [ $t != gy ]; then echo >&2 "$0: wanted gy; found $t"; exit 1; fi

  cat <<EOF
static const mpw c_${n}_r[] = {
EOF
  ./mpdump $r
  cat <<EOF
};

static const mpw c_${n}_h[] = {
EOF
  ./mpdump $h
  cat <<EOF
};

static const mpw c_${n}_gx[] = {
EOF
  ./mpdump $gx
  cat <<EOF
};

static const mpw c_${n}_gy[] = {
EOF
  ./mpdump $gy
  cat <<EOF
};

EOF

  case $f in
    prime) ftag=FTAG_PRIME;;
    niceprime) ftag=FTAG_NICEPRIME;;
    binpoly) ftag=FTAG_BINPOLY;;
  esac
  cat <<EOF
static const ecdata c_$n = {
  $ftag,
  c_${n}_p, N(c_${n}_p),
  c_${n}_a, N(c_${n}_a),
  c_${n}_b, N(c_${n}_b),
  c_${n}_r, N(c_${n}_r),
  c_${n}_h, N(c_${n}_h),
  c_${n}_gx, N(c_${n}_gx),
  c_${n}_gy, N(c_${n}_gy)
};

EOF

done

cat <<EOF
/*----- Main table --------------------------------------------------------*/

const ecentry ectab[] = {
EOF
for i in $names; do
  a=`echo $i | sed 's/=.*$//'`
  n=`echo $i | sed 's/^.*=//; s/[^a-zA-Z0-9_][^a-zA-Z0-9_]*/_/g'`
  cat <<EOF
  { "$a", &c_$n },
EOF
done
cat <<EOF
  { 0, 0 }
};

/*----- That's all, folks -------------------------------------------------*/
EOF