51 lines
1.9 KiB
Diff
51 lines
1.9 KiB
Diff
From 81944d1529202bd28359bede57c0a15deb65ba8a Mon Sep 17 00:00:00 2001
|
|
From: fullwaywang <fullwaywang@tencent.com>
|
|
Date: Mon, 29 May 2023 10:38:48 +0800
|
|
Subject: [PATCH] pkcs15init: correct left length calculation to fix buffer
|
|
overrun bug. Fixes #2785
|
|
|
|
---
|
|
src/pkcs15init/pkcs15-cardos.c | 10 +++++-----
|
|
1 file changed, 5 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/src/pkcs15init/pkcs15-cardos.c b/src/pkcs15init/pkcs15-cardos.c
|
|
index 9715cf390f..f41f73c349 100644
|
|
--- a/src/pkcs15init/pkcs15-cardos.c
|
|
+++ b/src/pkcs15init/pkcs15-cardos.c
|
|
@@ -872,7 +872,7 @@ static int cardos_have_verifyrc_package(sc_card_t *card)
|
|
sc_apdu_t apdu;
|
|
u8 rbuf[SC_MAX_APDU_BUFFER_SIZE];
|
|
int r;
|
|
- const u8 *p = rbuf, *q;
|
|
+ const u8 *p = rbuf, *q, *pp;
|
|
size_t len, tlen = 0, ilen = 0;
|
|
|
|
sc_format_apdu(card, &apdu, SC_APDU_CASE_2_SHORT, 0xca, 0x01, 0x88);
|
|
@@ -888,13 +888,13 @@ static int cardos_have_verifyrc_package(sc_card_t *card)
|
|
return 0;
|
|
|
|
while (len != 0) {
|
|
- p = sc_asn1_find_tag(card->ctx, p, len, 0xe1, &tlen);
|
|
- if (p == NULL)
|
|
+ pp = sc_asn1_find_tag(card->ctx, p, len, 0xe1, &tlen);
|
|
+ if (pp == NULL)
|
|
return 0;
|
|
if (card->type == SC_CARD_TYPE_CARDOS_M4_3) {
|
|
/* the verifyRC package on CardOS 4.3B use Manufacturer ID 0x01 */
|
|
/* and Package Number 0x07 */
|
|
- q = sc_asn1_find_tag(card->ctx, p, tlen, 0x01, &ilen);
|
|
+ q = sc_asn1_find_tag(card->ctx, pp, tlen, 0x01, &ilen);
|
|
if (q == NULL || ilen != 4)
|
|
return 0;
|
|
if (q[0] == 0x07)
|
|
@@ -902,7 +902,7 @@ static int cardos_have_verifyrc_package(sc_card_t *card)
|
|
} else if (card->type == SC_CARD_TYPE_CARDOS_M4_4) {
|
|
/* the verifyRC package on CardOS 4.4 use Manufacturer ID 0x03 */
|
|
/* and Package Number 0x02 */
|
|
- q = sc_asn1_find_tag(card->ctx, p, tlen, 0x03, &ilen);
|
|
+ q = sc_asn1_find_tag(card->ctx, pp, tlen, 0x03, &ilen);
|
|
if (q == NULL || ilen != 4)
|
|
return 0;
|
|
if (q[0] == 0x02)
|
|
|