mirror of git://anongit.mindrot.org/openssh.git
105 lines
3.6 KiB
Bash
105 lines
3.6 KiB
Bash
#!/bin/sh
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# $OpenBSD: sntrup761.sh,v 1.9 2024/09/16 05:37:05 djm Exp $
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# Placed in the Public Domain.
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#
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AUTHOR="supercop-20240808/crypto_kem/sntrup761/ref/implementors"
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FILES=" supercop-20240808/cryptoint/crypto_int16.h
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supercop-20240808/cryptoint/crypto_int32.h
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supercop-20240808/cryptoint/crypto_int64.h
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supercop-20240808/crypto_sort/int32/portable4/sort.c
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supercop-20240808/crypto_sort/uint32/useint32/sort.c
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supercop-20240808/crypto_kem/sntrup761/compact/kem.c
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"
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###
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set -euo pipefail
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cd $1
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echo -n '/* $'
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echo 'OpenBSD: $ */'
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echo
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echo '/*'
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echo ' * Public Domain, Authors:'
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sed -e '/Alphabetical order:/d' -e 's/^/ * - /' < $AUTHOR
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echo ' */'
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echo
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echo '#include <string.h>'
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echo '#include "crypto_api.h"'
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echo
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echo '#define crypto_declassify(x, y) do {} while (0)'
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echo
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# Map the types used in this code to the ones in crypto_api.h. We use #define
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# instead of typedef since some systems have existing intXX types and do not
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# permit multiple typedefs even if they do not conflict.
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for t in int8 uint8 int16 uint16 int32 uint32 int64 uint64; do
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echo "#define $t crypto_${t}"
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done
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for x in 16 32 64 ; do
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echo "extern volatile crypto_int$x crypto_int${x}_optblocker;"
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done
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echo
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for i in $FILES; do
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echo "/* from $i */"
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# Changes to all files:
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# - remove all includes, we inline everything required.
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# - make functions not required elsewhere static.
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# - rename the functions we do use.
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# - remove unnecessary defines and externs.
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sed -e "/#include/d" \
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-e "s/crypto_kem_/crypto_kem_sntrup761_/g" \
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-e "s/^void /static void /g" \
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-e "s/^int16 /static int16 /g" \
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-e "s/^uint16 /static uint16 /g" \
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-e "/^extern /d" \
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-e '/CRYPTO_NAMESPACE/d' \
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-e "/^#define int32 crypto_int32/d" \
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-e 's/[ ]*$//' \
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$i | \
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case "$i" in
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*/cryptoint/crypto_int16.h)
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sed -e "s/static void crypto_int16_store/void crypto_int16_store/" \
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-e "s/^[#]define crypto_int16_optblocker.*//" \
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-e "s/static void crypto_int16_minmax/void crypto_int16_minmax/"
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;;
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*/cryptoint/crypto_int32.h)
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# Use int64_t for intermediate values in crypto_int32_minmax to
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# prevent signed 32-bit integer overflow when called by
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# crypto_sort_int32. Original code depends on -fwrapv (we set -ftrapv)
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sed -e "s/static void crypto_int32_store/void crypto_int32_store/" \
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-e "s/^[#]define crypto_int32_optblocker.*//" \
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-e "s/crypto_int32 crypto_int32_r = crypto_int32_y ^ crypto_int32_x;/crypto_int64 crypto_int32_r = (crypto_int64)crypto_int32_y ^ (crypto_int64)crypto_int32_x;/" \
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-e "s/crypto_int32 crypto_int32_z = crypto_int32_y - crypto_int32_x;/crypto_int64 crypto_int32_z = (crypto_int64)crypto_int32_y - (crypto_int64)crypto_int32_x;/" \
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-e "s/static void crypto_int32_minmax/void crypto_int32_minmax/"
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;;
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*/cryptoint/crypto_int64.h)
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sed -e "s/static void crypto_int64_store/void crypto_int64_store/" \
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-e "s/^[#]define crypto_int64_optblocker.*//" \
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-e "s/static void crypto_int64_minmax/void crypto_int64_minmax/"
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;;
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*/int32/portable4/sort.c)
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sed -e "s/void crypto_sort[(]/void crypto_sort_int32(/g"
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;;
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*/int32/portable5/sort.c)
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sed -e "s/crypto_sort_smallindices/crypto_sort_int32_smallindices/"\
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-e "s/void crypto_sort[(]/void crypto_sort_int32(/g"
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;;
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*/uint32/useint32/sort.c)
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sed -e "s/void crypto_sort/void crypto_sort_uint32/g"
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;;
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# Remove unused function to prevent warning.
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*/crypto_kem/sntrup761/ref/int32.c)
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sed -e '/ int32_div_uint14/,/^}$/d'
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;;
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# Remove unused function to prevent warning.
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*/crypto_kem/sntrup761/ref/uint32.c)
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sed -e '/ uint32_div_uint14/,/^}$/d'
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;;
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# Default: pass through.
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*)
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cat
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;;
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esac
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echo
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done
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