serval-dna/nacl-gcc-prep
gardners f55a6525a2 Added hooks and code to build and link to NaCl static library
(static is always the safer option for crypto libraries to avoid
nasty run-time suprises)
2011-10-17 08:11:05 +10:30

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# Fetch latest version of source as recommended by nacl installation page
if [ ! -e nacl-source.tar.bz2 ]; then
`wget -q -O - http://nacl.cr.yp.to/install.html | grep wget | sed -e 's/^ *//g' -e 's/^wget /wget -q -O nacl-source.tar.bz2 /'`
fi
# Extract tarball
mkdir -p nacl-source
arlist=`find . -name libnacl.a`
arcount=`echo $arlist | wc -l`
if [ $arcount -eq 0 ]; then
cd nacl-source
bzip2 -d ../nacl-source.tar | tar xvf -
nacldir=`echo *`
cd ${nacldir}
./do
cd ..
fi
# Test which one works for us
include=`find . -name crypto_box.h | head -1`
cat <<EOF >test.c
#include <stdio.h>
#include "${include}"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
/* it's really stupid that there isn't a syscall for this */
static int fd = -1;
void randombytes(unsigned char *x,unsigned long long xlen)
{
int i;
if (fd == -1) {
for (;;) {
fd = open("/dev/urandom",O_RDONLY);
if (fd != -1) break;
sleep(1);
}
}
while (xlen > 0) {
if (xlen < 1048576) i = xlen; else i = 1048576;
i = read(fd,x,i);
if (i < 1) {
sleep(1);
continue;
}
x += i;
xlen -= i;
}
}
unsigned char pk[crypto_box_PUBLICKEYBYTES];
unsigned char sk[crypto_box_SECRETKEYBYTES];
int main(int argc,char **argv) {
crypto_box_keypair(pk,sk);
printf("The compilation worked.\n");
}
EOF
for ar in $arlist
do
if [ -e test ]; then
rm test
fi
gcc -o test test.c $ar >/dev/null 2>&1
if [ -e test ]; then
naclbuilddir=`echo $ar | sed -e s,/libnacl.a,,`
echo "${naclbuilddir}" > naclbuilddir.txt
fi
done
if [ -e test ]; then
rm test
fi
includedir=`cat naclbuilddir.txt | sed s,/lib/,/include/,`
ls -1 ${includedir} | sed -e 's,^,#include "'"${includedir}"'/,' -e 's,$,",' > nacl.h