crypto/openssh/ed25519.sh

   1 #!/bin/sh
   2 #       $OpenBSD: ed25519.sh,v 1.1 2023/01/15 23:05:32 djm Exp $
   3 #       Placed in the Public Domain.
   4 #
   5 AUTHOR="supercop-20221122/crypto_sign/ed25519/ref/implementors"
   6 FILES="
   7         supercop-20221122/crypto_verify/32/ref/verify.c
   8         supercop-20221122/crypto_sign/ed25519/ref/fe25519.h
   9         supercop-20221122/crypto_sign/ed25519/ref/fe25519.c
  10         supercop-20221122/crypto_sign/ed25519/ref/sc25519.h
  11         supercop-20221122/crypto_sign/ed25519/ref/sc25519.c
  12         supercop-20221122/crypto_sign/ed25519/ref/ge25519.h
  13         supercop-20221122/crypto_sign/ed25519/ref/ge25519.c
  14         supercop-20221122/crypto_sign/ed25519/ref/keypair.c
  15         supercop-20221122/crypto_sign/ed25519/ref/sign.c
  16         supercop-20221122/crypto_sign/ed25519/ref/open.c
  17 "
  18 ###
  19
  20 DATA="supercop-20221122/crypto_sign/ed25519/ref/ge25519_base.data"
  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
  34 echo '#include "crypto_api.h"'
  35 echo
  36 # Map the types used in this code to the ones in crypto_api.h.  We use #define
  37 # instead of typedef since some systems have existing intXX types and do not
  38 # permit multiple typedefs even if they do not conflict.
  39 for t in int8 uint8 int16 uint16 int32 uint32 int64 uint64; do
  40         echo "#define $t crypto_${t}"
  41 done
  42 echo
  43 for i in $FILES; do
  44         echo "/* from $i */"
  45         # Changes to all files:
  46         #  - inline ge25519_base.data where it is included
  47         #  - expand CRYPTO_NAMESPACE() namespacing define
  48         #  - remove all includes, we inline everything required.
  49         #  - make functions not required elsewhere static.
  50         #  - rename the functions we do use.
  51         sed \
  52             -e "/#include \"ge25519_base.data\"/r $DATA" \
  53             -e "/#include/d" \
  54             -e "s/^void /static void /g" \
  55             -e 's/CRYPTO_NAMESPACE[(]\([a-zA-Z0-9_]*\)[)]/crypto_sign_ed25519_ref_\1/g' \
  56             $i | \
  57         case "$i" in
  58         */crypto_verify/32/ref/verify.c)
  59             # rename crypto_verify() to the name that the ed25519 code expects.
  60             sed -e "/^#include.*/d" \
  61                 -e "s/crypto_verify/crypto_verify_32/g" \
  62                 -e "s/^int /static int /g"
  63             ;;
  64         */crypto_sign/ed25519/ref/sign.c)
  65             # rename signing function to the name OpenSSH expects
  66             sed -e "s/crypto_sign/crypto_sign_ed25519/g"
  67             ;;
  68         */crypto_sign/ed25519/ref/keypair.c)
  69             # rename key generation function to the name OpenSSH expects
  70             sed -e "s/crypto_sign_keypair/crypto_sign_ed25519_keypair/g"
  71             ;;
  72         */crypto_sign/ed25519/ref/open.c)
  73             # rename verification function to the name OpenSSH expects
  74             sed -e "s/crypto_sign_open/crypto_sign_ed25519_open/g"
  75             ;;
  76         */crypto_sign/ed25519/ref/fe25519.*)
  77             # avoid a couple of name collions with other files
  78             sed -e "s/reduce_add_sub/fe25519_reduce_add_sub/g" \
  79                 -e "s/ equal[(]/ fe25519_equal(/g" \
  80                 -e "s/^int /static int /g"
  81             ;;
  82         */crypto_sign/ed25519/ref/sc25519.h)
  83             # Lots of unused prototypes to remove
  84             sed -e "s/^int /static int /g" \
  85                 -e '/shortsc25519_from16bytes/d' \
  86                 -e '/sc25519_iszero_vartime/d' \
  87                 -e '/sc25519_isshort_vartime/d' \
  88                 -e '/sc25519_lt_vartime/d' \
  89                 -e '/sc25519_sub_nored/d' \
  90                 -e '/sc25519_mul_shortsc/d' \
  91                 -e '/sc25519_from_shortsc/d' \
  92                 -e '/sc25519_window5/d'
  93             ;;
  94         */crypto_sign/ed25519/ref/sc25519.c)
  95             # Lots of unused code to remove, some name collisions to avoid
  96             sed -e "s/reduce_add_sub/sc25519_reduce_add_sub/g" \
  97                 -e "s/ equal[(]/ sc25519_equal(/g" \
  98                 -e "s/^int /static int /g" \
  99                 -e "s/m[[]/sc25519_m[/g" \
 100                 -e "s/mu[[]/sc25519_mu[/g" \
 101                 -e '/shortsc25519_from16bytes/,/^}$/d' \
 102                 -e '/sc25519_iszero_vartime/,/^}$/d' \
 103                 -e '/sc25519_isshort_vartime/,/^}$/d' \
 104                 -e '/sc25519_lt_vartime/,/^}$/d' \
 105                 -e '/sc25519_sub_nored/,/^}$/d' \
 106                 -e '/sc25519_mul_shortsc/,/^}$/d' \
 107                 -e '/sc25519_from_shortsc/,/^}$/d' \
 108                 -e '/sc25519_window5/,/^}$/d'
 109             ;;
 110         */crypto_sign/ed25519/ref//ge25519.*)
 111             sed -e "s/^int /static int /g"
 112             ;;
 113         # Default: pass through.
 114         *)
 115             cat
 116             ;;
 117         esac | \
 118         sed -e 's/[      ]*$//'
 119 done