1#!/bin/sh 2# $OpenBSD: sntrup761.sh,v 1.9 2024/09/16 05:37:05 djm Exp $ 3# Placed in the Public Domain. 4# 5AUTHOR="supercop-20240808/crypto_kem/sntrup761/ref/implementors" 6FILES=" supercop-20240808/cryptoint/crypto_int16.h 7 supercop-20240808/cryptoint/crypto_int32.h 8 supercop-20240808/cryptoint/crypto_int64.h 9 supercop-20240808/crypto_sort/int32/portable4/sort.c 10 supercop-20240808/crypto_sort/uint32/useint32/sort.c 11 supercop-20240808/crypto_kem/sntrup761/compact/kem.c 12" 13### 14 15set -euo pipefail 16cd $1 17echo -n '/* $' 18echo 'OpenBSD: $ */' 19echo 20echo '/*' 21echo ' * Public Domain, Authors:' 22sed -e '/Alphabetical order:/d' -e 's/^/ * - /' < $AUTHOR 23echo ' */' 24echo 25echo '#include <string.h>' 26echo '#include "crypto_api.h"' 27echo 28echo '#define crypto_declassify(x, y) do {} while (0)' 29echo 30# Map the types used in this code to the ones in crypto_api.h. We use #define 31# instead of typedef since some systems have existing intXX types and do not 32# permit multiple typedefs even if they do not conflict. 33for t in int8 uint8 int16 uint16 int32 uint32 int64 uint64; do 34 echo "#define $t crypto_${t}" 35done 36 37for x in 16 32 64 ; do 38 echo "extern volatile crypto_int$x crypto_int${x}_optblocker;" 39done 40 41echo 42for 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 */cryptoint/crypto_int16.h) 61 sed -e "s/static void crypto_int16_store/void crypto_int16_store/" \ 62 -e "s/^[#]define crypto_int16_optblocker.*//" \ 63 -e "s/static void crypto_int16_minmax/void crypto_int16_minmax/" 64 ;; 65 */cryptoint/crypto_int32.h) 66 # Use int64_t for intermediate values in crypto_int32_minmax to 67 # prevent signed 32-bit integer overflow when called by 68 # crypto_sort_int32. Original code depends on -fwrapv (we set -ftrapv) 69 sed -e "s/static void crypto_int32_store/void crypto_int32_store/" \ 70 -e "s/^[#]define crypto_int32_optblocker.*//" \ 71 -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;/" \ 72 -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;/" \ 73 -e "s/static void crypto_int32_minmax/void crypto_int32_minmax/" 74 ;; 75 */cryptoint/crypto_int64.h) 76 sed -e "s/static void crypto_int64_store/void crypto_int64_store/" \ 77 -e "s/^[#]define crypto_int64_optblocker.*//" \ 78 -e "s/static void crypto_int64_minmax/void crypto_int64_minmax/" 79 ;; 80 */int32/portable4/sort.c) 81 sed -e "s/void crypto_sort[(]/void crypto_sort_int32(/g" 82 ;; 83 */int32/portable5/sort.c) 84 sed -e "s/crypto_sort_smallindices/crypto_sort_int32_smallindices/"\ 85 -e "s/void crypto_sort[(]/void crypto_sort_int32(/g" 86 ;; 87 */uint32/useint32/sort.c) 88 sed -e "s/void crypto_sort/void crypto_sort_uint32/g" 89 ;; 90 # Remove unused function to prevent warning. 91 */crypto_kem/sntrup761/ref/int32.c) 92 sed -e '/ int32_div_uint14/,/^}$/d' 93 ;; 94 # Remove unused function to prevent warning. 95 */crypto_kem/sntrup761/ref/uint32.c) 96 sed -e '/ uint32_div_uint14/,/^}$/d' 97 ;; 98 # Default: pass through. 99 *) 100 cat 101 ;; 102 esac 103 echo 104done 105