diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c b/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c index 5eb28cb20..b4ea540de 100644 --- a/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c +++ b/src/libstrongswan/plugins/gmp/gmp_rsa_private_key.c @@ -374,9 +374,13 @@ static bool belongs_to(private_gmp_rsa_private_key_t *this, public_key_t *public chunk_t gmp_mpz_to_asn1(const mpz_t value) { chunk_t n; - - n.ptr = mpz_export(NULL, &n.len, 1, 1, 1, 0, value); - + + n.len = 1 + mpz_sizeinbase(value, 2) / 8; /* size in bytes */ + n.ptr = mpz_export(NULL, NULL, 1, n.len, 1, 0, value); + if (n.ptr == NULL) + { /* if we have zero in "value", gmp returns NULL */ + n.len = 0; + } return asn1_wrap(ASN1_INTEGER, "m", n); } |