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;;
bits=*)
bits="`echo "${arg}" | cut -f 2 -d =`"
;;
esac
done
openssl_dhparam() {
openssl_dhparam1() {
if openssl dhparam -C "$@" | sed \
-e 's/^\(static \)*DH \*get_dh[0-9]*/static DH *get_dhParams/' \
-e '/^-----BEGIN DH PARAMETERS-----$/,/^-----END DH PARAMETERS-----$/ d;/^#/ d'
then
return 0
fi
return 1
}
# OpenSSL 3.0 openssl-dhparam has no "-C" option, so we emulate it here
openssl_dhparam3() {
cat << \_EOF_
#include <openssl/dh.h>
#include <openssl/bn.h>
static DH *get_dhParams(void) {
static unsigned char dhp[] = {
_EOF_
openssl dhparam -text "$@" | \
sed -E -e '/^---/,/^---/d' \
-e '/(DH|prime|generator|P|G|recommended)/d' \
-e 's/([0-9a-h]{2})(:|$$)/0x\1, /g'
cat << \_EOF_
};
static unsigned char dhg[] = {
0x02,
};
DH *dh = DH_new();;
BIGNUM *p, *g;
if (dh == NULL) {
return NULL;
}
p = BN_bin2bn(dhp, sizeof (dhp), NULL);
g = BN_bin2bn(dhg, sizeof (dhg), NULL);
if (p == NULL || g == NULL || !DH_set0_pqg(dh, p, NULL, g)) {
DH_free(dh);
BN_free(p);
BN_free(g);
return(NULL);
}
return dh;
}
_EOF_
return 0
}
gen_dh_params_openssl() {
openssl_dhparam "${bits}" < /dev/null || return 1
openssl_dhparam3 "${bits}" < /dev/null || return 1
return 0
}
gen_dh_params_remote() {
url="https://2ton.com.au/dhparam/${bits}"
r_input="`curl -sS "${url}"`" || \
r_input="`wget -O - -o /dev/null "${url}"`" || return 1
if r_output="`echo "${r_input}" | openssl_dhparam`"; then
if r_output="`echo "${r_input}" | openssl_dhparam1`"; then
echo "${r_output}"
return 0
fi
return 1
}
gen_dh_params_fallback() {
cat << \_EOF_
#include <openssl/dh.h>
#include <openssl/bn.h>
DH *get_dhParams(void) {
static unsigned char dhp[] = {
_EOF_
case "${bits}" in
2048)
cat << \_EOF_
0xC1,0x51,0x58,0x69,0xFB,0xE8,0x6C,0x47,0x2B,0x86,0x61,0x4F,
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echo "*****************************" >&2
echo "** Generating DH Primes. **" >&2
echo "** This will take a while. **" >&2
echo "*****************************" >&2
echo "Use OpenSSL" >&2
gen_dh_params_openssl && exit 0
echo "Use Remote" >&2
gen_dh_params_remote && exit 0
#echo "Use Remote" >&2
#gen_dh_params_remote && exit 0
echo "Use fallback" >&2
gen_dh_params_fallback && exit 0
echo "Unable to generate parameters for DH of ${bits} bits" >&2
exit 1
|