crypto/openssh/sntrup761.sh

   1 #!/bin/sh
   2 #       $OpenBSD: sntrup761.sh,v 1.5 2021/01/08 02:33:13 dtucker 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 unneccesary 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             $i | \
  58         case "$i" in
  59         # Use int64_t for intermediate values in int32_MINMAX to prevent signed
  60         # 32-bit integer overflow when called by crypto_sort_uint32.
  61         */int32_minmax.inc)
  62             sed -e "s/int32 ab = b ^ a/int64_t ab = (int64_t)b ^ (int64_t)a/" \
  63                 -e "s/int32 c = b - a/int64_t c = (int64_t)b - (int64_t)a/"
  64             ;;
  65         */int32/portable4/sort.c)
  66             sed -e "s/void crypto_sort/void crypto_sort_int32/g"
  67             ;;
  68         */uint32/useint32/sort.c)
  69             sed -e "s/void crypto_sort/void crypto_sort_uint32/g"
  70             ;;
  71         # Remove unused function to prevent warning.
  72         */crypto_kem/sntrup761/ref/int32.c)
  73             sed -e '/ int32_div_uint14/,/^}$/d'
  74             ;;
  75         # Remove unused function to prevent warning.
  76         */crypto_kem/sntrup761/ref/uint32.c)
  77             sed -e '/ uint32_div_uint14/,/^}$/d'
  78             ;;
  79         # Default: pass through.
  80         *)
  81             cat
  82             ;;
  83         esac
  84         echo
  85 done