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authorKenneth Lundin <[email protected]>2018-12-04 09:40:41 +0100
committerKenneth Lundin <[email protected]>2018-12-04 09:40:41 +0100
commit7c79f91fd5878c31c302015f5fc7fec51e4e7977 (patch)
treee6ac3daf73ddf3e2acde32b1aedbb311f340b414
parent721b04340b666d476732dfba31f5c89091085d6e (diff)
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Handle erroneous length during decode (BER only) without crashing
-rw-r--r--lib/asn1/c_src/asn1_erl_nif.c2
-rw-r--r--lib/asn1/test/asn1_SUITE.erl16
2 files changed, 16 insertions, 2 deletions
diff --git a/lib/asn1/c_src/asn1_erl_nif.c b/lib/asn1/c_src/asn1_erl_nif.c
index 797be6d4f8..da43af3405 100644
--- a/lib/asn1/c_src/asn1_erl_nif.c
+++ b/lib/asn1/c_src/asn1_erl_nif.c
@@ -999,7 +999,7 @@ static int ber_decode_value(ErlNifEnv* env, ERL_NIF_TERM *value, unsigned char *
while (*ib_index < end_index) {
if ((maybe_ret = ber_decode(env, &term, in_buf, ib_index,
- *ib_index + len)) <= ASN1_ERROR
+ end_index )) <= ASN1_ERROR
)
return maybe_ret;
curr_head = enif_make_list_cell(env, term, curr_head);
diff --git a/lib/asn1/test/asn1_SUITE.erl b/lib/asn1/test/asn1_SUITE.erl
index 5506923341..ab78678110 100644
--- a/lib/asn1/test/asn1_SUITE.erl
+++ b/lib/asn1/test/asn1_SUITE.erl
@@ -63,7 +63,8 @@ groups() ->
constraint_equivalence]},
{ber, Parallel,
- [ber_choiceinseq,
+ [ber_decode_invalid_length,
+ ber_choiceinseq,
% Uses 'SOpttest'
ber_optional,
tagdefault_automatic]},
@@ -665,6 +666,19 @@ module_test(M0, Config, Rule, Opts) ->
end
end.
+ber_decode_invalid_length(_Config) ->
+ Bin = <<48,129,157,48,0,2,1,2,164,0,48,129,154,49,24,48,22,6,
+ 3,85,4,10,19,15,69,120,97,109,112,108,101,32,67,111,
+ 109,112,97,110,121,49,29,48,27,6,9,42,134,72,134,247,
+ 13,1,9,1,22,14,99,97,64,101,120,97,109,112,108,101,46,
+ 99,111,109,49,13,48,11,6,3,85,4,7,19,4,79,117,108,117,
+ 49,26,48,24,6,3,85,4,8,19,17,80,111,104,106,111,105,
+ 115,45,80,111,104,106,97,110,109,97,97,49,11,48,9,6,3,
+ 85,4,6,19,2,70,73,49,19,48,17,6,3,85,4,3,19,10,69,120,
+ 97,109,112,108,101,32,67,65,49,11,48,16,6,3,85,4,11,
+ 19,9,84,101>>,
+ {'EXIT',{error,{asn1,{invalid_value,12}}}} = (catch asn1rt_nif:decode_ber_tlv(Bin)),
+ ok.
ber_choiceinseq(Config) ->
test(Config, fun ber_choiceinseq/3, [ber]).