(decode_boolean): fail if length of tag is larger then len

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@14187 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/asn1/der_get.c

@@ -265,6 +265,8 @@ decode_boolean (const unsigned char *p, size_t len,
     p += l;
     len -= l;
     ret += l;
+    if (reallen > len)
+	return ASN1_OVERRUN;
     e = der_get_boolean (p, reallen, num, &l);
     if (e) return e;
     p += l;