diff options
| -rw-r--r-- | g10/parse-packet.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/g10/parse-packet.c b/g10/parse-packet.c index aee6e0798..5fea1ac43 100644 --- a/g10/parse-packet.c +++ b/g10/parse-packet.c @@ -252,13 +252,16 @@ mpi_read_detect_0_removal (iobuf_t inp, unsigned int *ret_nread, int secure, a = NULL; /* Possibly, it has leading zeros. */ - nbits1 = gcry_mpi_get_nbits (a); - if (nbits > nbits1) + if (a) { - *r_csum_tweak -= (nbits >> 8); - *r_csum_tweak -= (nbits & 0xff); - *r_csum_tweak += (nbits1 >> 8); - *r_csum_tweak += (nbits1 & 0xff); + nbits1 = gcry_mpi_get_nbits (a); + if (nbits > nbits1) + { + *r_csum_tweak -= (nbits >> 8); + *r_csum_tweak -= (nbits & 0xff); + *r_csum_tweak += (nbits1 >> 8); + *r_csum_tweak += (nbits1 & 0xff); + } } *ret_nread = nread; |