#!/bin/sh
#
# Written by Dridi Boukelmoune <dridi.boukelmoune@gmail.com>
#
# This file is in the public domain.
#
# 5.1.  Integer Representation
#
#    [...]
#
#    This integer representation allows for values of indefinite size.  It
#    is also possible for an encoder to send a large number of zero
#    values, which can waste octets and could be used to overflow integer
#    values.  Integer encodings that exceed implementation limits -- in
#    value or octet length -- MUST be treated as decoding errors.
#    Different limits can be set for each of the different uses of
#    integers, based on implementation constraints.

. "$(dirname "$0")"/common.sh

mk_msg </dev/null
mk_tbl </dev/null

_ ----------------
_ Buffer overflows
_ ----------------

mk_bin <<EOF
11111111 | The rest of the integer is missing...
EOF

tst_decode --expect-error BUF

mk_bin <<EOF
00000000 | Try to read two integers with only one available
EOF

tst_decode --expect-error BUF

_ -----------------
_ Integer overflows
_ -----------------

mk_bin <<EOF
11111111 | Use an indexed field
10000001 | to make a 7+ integer
11111111 | overflow with the
00000011 | value UINT16_MAX + 1
EOF

tst_decode --expect-error INT

mk_bin <<EOF
01111111 | Use a dynamic field
11000001 | to make a 6+ integer
11111111 | overflow with the
00000011 | value UINT16_MAX + 1
EOF

tst_decode --expect-error INT

mk_bin <<EOF
00111111 | Use a table update
11100001 | to make a 5+ integer
11111111 | overflow with the
00000011 | value UINT16_MAX + 1
EOF

tst_decode --expect-error INT

mk_bin <<EOF
00001111 | Use a literal field
11110001 | to make a 4+ integer
11111111 | overflow with the
00000011 | value UINT16_MAX + 1
EOF

tst_decode --expect-error INT

_ -------
_ Fuzzing
_ -------

mk_bin <<EOF
00111111 | Use a table update
10000000 | to make a 5+ integer
10000000 | stupidly packed with
10000000 | way more bytes than
10000000 | needed to encode its
10000000 | rather small value.
10000000 | For cashpack it will
00000000 | fail decoding.
EOF

HDECODE=hdecode # XXX: nghttp2 accepts this
tst_decode --expect-error INT --table-size 1024