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Fix a signal cleanup problem.

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Fix zero length MPI reading.
This commit is contained in:
Werner Koch 2009-05-26 09:29:02 +00:00
parent e095815c4d
commit 21ad035cc9
3 changed files with 24 additions and 3 deletions
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16
g10/parse-packet.c
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@ -139,9 +139,19 @@ mpi_read (iobuf_t inp, unsigned int *ret_nread, int secure)
p[i+2] = iobuf_get(inp) & 0xff;
nread++;
}
if ( gcry_mpi_scan( &a, GCRYMPI_FMT_PGP, buf, nread, &nread ) )
a = NULL;
if (nread >= 2 && !(buf[0] << 8 | buf[1]))
{
/* Libgcrypt < 1.5.0 accidently rejects zero-length (i.e. zero)
MPIs. We fix this here. */
a = gcry_mpi_new (0);
}
else
{
if ( gcry_mpi_scan( &a, GCRYMPI_FMT_PGP, buf, nread, &nread ) )
a = NULL;
}
leave:
gcry_free(buf);
if ( nread > *ret_nread )