sntrup761.sh

   1 #!/bin/sh
   2 #       $OpenBSD: sntrup761.sh,v 1.7 2023/01/11 02:13:52 djm Exp $
   3 #       Placed in the Public Domain.
   4 #
   5 AUTHOR="supercop-20201130/crypto_kem/sntrup761/ref/implementors"
   6 FILES="
   7         supercop-20201130/crypto_sort/int32/portable4/int32_minmax.inc
   8         supercop-20201130/crypto_sort/int32/portable4/sort.c
   9         supercop-20201130/crypto_sort/uint32/useint32/sort.c
  10         supercop-20201130/crypto_kem/sntrup761/ref/uint32.c
  11         supercop-20201130/crypto_kem/sntrup761/ref/int32.c
  12         supercop-20201130/crypto_kem/sntrup761/ref/paramsmenu.h
  13         supercop-20201130/crypto_kem/sntrup761/ref/params.h
  14         supercop-20201130/crypto_kem/sntrup761/ref/Decode.h
  15         supercop-20201130/crypto_kem/sntrup761/ref/Decode.c
  16         supercop-20201130/crypto_kem/sntrup761/ref/Encode.h
  17         supercop-20201130/crypto_kem/sntrup761/ref/Encode.c
  18         supercop-20201130/crypto_kem/sntrup761/ref/kem.c
  19 "
  20 ###
  21
  22 set -e
  23 cd $1
  24 echo -n '/*  $'
  25 echo 'OpenBSD: $ */'
  26 echo
  27 echo '/*'
  28 echo ' * Public Domain, Authors:'
  29 sed -e '/Alphabetical order:/d' -e 's/^/ * - /' < $AUTHOR
  30 echo ' */'
  31 echo
  32 echo '#include <string.h>'
  33 echo '#include "crypto_api.h"'
  34 echo
  35 # Map the types used in this code to the ones in crypto_api.h.  We use #define
  36 # instead of typedef since some systems have existing intXX types and do not
  37 # permit multiple typedefs even if they do not conflict.
  38 for t in int8 uint8 int16 uint16 int32 uint32 int64 uint64; do
  39         echo "#define $t crypto_${t}"
  40 done
  41 echo
  42 for i in $FILES; do
  43         echo "/* from $i */"
  44         # Changes to all files:
  45         #  - remove all includes, we inline everything required.
  46         #  - make functions not required elsewhere static.
  47         #  - rename the functions we do use.
  48         #  - remove unnecessary defines and externs.
  49         sed -e "/#include/d" \
  50             -e "s/crypto_kem_/crypto_kem_sntrup761_/g" \
  51             -e "s/^void /static void /g" \
  52             -e "s/^int16 /static int16 /g" \
  53             -e "s/^uint16 /static uint16 /g" \
  54             -e "/^extern /d" \
  55             -e '/CRYPTO_NAMESPACE/d' \
  56             -e "/^#define int32 crypto_int32/d" \
  57             -e 's/[      ]*$//' \
  58             $i | \
  59         case "$i" in
  60         # Use int64_t for intermediate values in int32_MINMAX to prevent signed
  61         # 32-bit integer overflow when called by crypto_sort_uint32.
  62         */int32_minmax.inc)
  63             sed -e "s/int32 ab = b ^ a/int64_t ab = (int64_t)b ^ (int64_t)a/" \
  64                 -e "s/int32 c = b - a/int64_t c = (int64_t)b - (int64_t)a/"
  65             ;;
  66         */int32/portable4/sort.c)
  67             sed -e "s/void crypto_sort/void crypto_sort_int32/g"
  68             ;;
  69         */uint32/useint32/sort.c)
  70             sed -e "s/void crypto_sort/void crypto_sort_uint32/g"
  71             ;;
  72         # Remove unused function to prevent warning.
  73         */crypto_kem/sntrup761/ref/int32.c)
  74             sed -e '/ int32_div_uint14/,/^}$/d'
  75             ;;
  76         # Remove unused function to prevent warning.
  77         */crypto_kem/sntrup761/ref/uint32.c)
  78             sed -e '/ uint32_div_uint14/,/^}$/d'
  79             ;;
  80         # Default: pass through.
  81         *)
  82             cat
  83             ;;
  84         esac
  85         echo
  86 done