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(loop): check for length longer than data. inspired by

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lha@stacken.kth.se


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9424 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
2000-12-29 03:34:16 +00:00
parent f9adc800a7
commit 9d2457898b
1 changed files with 4 additions and 1 deletions
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5
lib/asn1/asn1_print.c
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@@ -1,5 +1,5 @@
/* /*
* Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H<>gskolan * Copyright (c) 1997 - 2000 Kungliga Tekniska H<>gskolan
* (Royal Institute of Technology, Stockholm, Sweden). * (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved. * All rights reserved.
* *
@@ -99,6 +99,9 @@ loop (unsigned char *buf, size_t len, int indent)
ret = der_get_tag (buf, len, &class, &type, &tag, &sz); ret = der_get_tag (buf, len, &class, &type, &tag, &sz);
if (ret) if (ret)
errx (1, "der_get_tag: %s", com_right (et_list, ret)); errx (1, "der_get_tag: %s", com_right (et_list, ret));
if (sz > len)
errx (1, "unreasonable length (%u) > %u",
(unsigned)sz, (unsigned)len);
buf += sz; buf += sz;
len -= sz; len -= sz;
for (i = 0; i < indent; ++i) for (i = 0; i < indent; ++i)