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Prevent running off the end of the buffer if the asn.1 is invalid (Chaskiel G.) 

git-svn-id: https://www.opensc-project.org/svnp/opensc/trunk@1674 c6295689-39f2-0310-b995-f0e70906c6a9
This commit is contained in:
sth 2003-12-16 08:01:36 +00:00
parent 83a5cb1426
commit 6b66973692
1 changed files with 2 additions and 0 deletions
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2
src/libopensc/asn1.c
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@ -311,6 +311,8 @@ const u8 *sc_asn1_find_tag(struct sc_context *ctx, const u8 * buf,
buf = p;
if (sc_asn1_read_tag(&p, left, &cla, &tag, &taglen) != 1)
return NULL;
if (left < (p - buf))
return NULL;
left -= (p - buf);
if ((tag | cla) == tag_in) {
if (taglen > left)