diff options
| -rw-r--r-- | g10/build-packet.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/g10/build-packet.c b/g10/build-packet.c index 028d064a0..2e9dfa4b6 100644 --- a/g10/build-packet.c +++ b/g10/build-packet.c @@ -204,7 +204,12 @@ do_user_id( IOBUF out, int ctb, PKT_user_id *uid ) { if( uid->attrib_data ) { - write_header(out, ctb, uid->attrib_len); + /* We need to take special care of a user ID with a length of 0: + * Without forcing HDRLEN to 2 in this case an indeterminate length + * packet would be written which is not allowed. Note that we are + * always called with a CTB indicating an old packet header format, + * so that forcing a 2 octet header works. */ + write_header2(out, ctb, uid->attrib_len, (uid->attrib_len? 0 : 2)); if( iobuf_write( out, uid->attrib_data, uid->attrib_len ) ) return G10ERR_WRITE_FILE; } |