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53 lines
1.7 KiB
53 lines
1.7 KiB
From 3ff1f7234abb4c42273adedbe06d9e7f9f3a5f9d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Nguy=E1=BB=85n=20H=E1=BB=93ng=20Qu=C3=A2n?=
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<ng.hong.quan@gmail.com>
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Date: Thu, 11 Apr 2013 16:18:31 +0700
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Subject: [PATCH 14/26] OpenPGP: Overcome the restriction of even data length
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of Gnuk.
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When write certificate with odd length to Gnuk, we add zero padding to make it even.
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---
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src/libopensc/card-openpgp.c | 20 ++++++++++++++++++--
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1 file changed, 18 insertions(+), 2 deletions(-)
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diff --git a/src/libopensc/card-openpgp.c b/src/libopensc/card-openpgp.c
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index 7cea84f..7a77a71 100644
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--- a/src/libopensc/card-openpgp.c
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+++ b/src/libopensc/card-openpgp.c
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@@ -1208,6 +1208,10 @@ static int gnuk_write_certificate(sc_card_t *card, const u8 *buf, size_t length)
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sc_apdu_t apdu;
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u8 *part;
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size_t plen;
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+ /* Two round_ variables below are to build APDU data
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+ * with even length for Gnuk */
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+ u8 roundbuf[256];
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+ size_t roundlen = 0;
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int r = SC_SUCCESS;
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LOG_FUNC_CALLED(ctx);
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@@ -1238,8 +1242,20 @@ static int gnuk_write_certificate(sc_card_t *card, const u8 *buf, size_t length)
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sc_format_apdu(card, &apdu, SC_APDU_CASE_3_SHORT, 0xD6, i, 0);
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}
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apdu.flags |= SC_APDU_FLAGS_CHAINING;
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- apdu.data = part;
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- apdu.datalen = apdu.lc = plen;
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+
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+ /* If the last part has odd length, we add zero padding to make it even.
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+ * Gnuk does not allow data with odd length */
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+ if (plen < 256 && (plen % 2) != 0) {
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+ roundlen = plen + 1;
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+ memset(roundbuf, 0, roundlen);
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+ memcpy(roundbuf, part, plen);
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+ apdu.data = roundbuf;
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+ apdu.datalen = apdu.lc = roundlen;
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+ }
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+ else {
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+ apdu.data = part;
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+ apdu.datalen = apdu.lc = plen;
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+ }
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r = sc_transmit_apdu(card, &apdu);
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LOG_TEST_RET(card->ctx, r, "APDU transmit failed");
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--
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2.1.3
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