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tcos: Make sure we have at least two bytes to dive into the cycle

This commit is contained in:
Jakub Jelen 2020-11-18 11:21:44 +01:00 committed by Frank Morgner
parent 65461e4eb5
commit 412372b024
1 changed files with 1 additions and 1 deletions
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2
src/libopensc/pkcs15-tcos.c
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@ -139,7 +139,7 @@ static int insert_key(
"Searching for Key-Ref %02X\n", key_reference);
while ((r = sc_read_record(card, ++rec_no, buf, sizeof(buf), SC_RECORD_BY_REC_NR)) > 0) {
int found = 0;
if (buf[0] != 0xA0)
if (buf[0] != 0xA0 || r < 2)
continue;
for (i = 2; i < buf[1] + 2 && i < r - 2; i += 2 + buf[i + 1]) {
if (buf[i] == 0x83 && buf[i + 1] == 1 && buf[i + 2] == key_reference)