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87 lines
2.9 KiB
87 lines
2.9 KiB
From 7231ee09bb628f0401939778decce818ef6e3665 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: Fri, 5 Apr 2013 17:18:50 +0700
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Subject: [PATCH 11/18] OpenPGP: Provide enough buffer to read pubkey from
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Gnuk.
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---
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src/libopensc/card-openpgp.c | 28 +++++++++++++++++++++++-----
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1 file changed, 23 insertions(+), 5 deletions(-)
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diff --git a/src/libopensc/card-openpgp.c b/src/libopensc/card-openpgp.c
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index 9b08bbb..8a1a270 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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@@ -263,7 +263,12 @@ static struct do_info pgp2_objects[] = { /* OpenPGP card spec 2.0 */
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/* The DO holding X.509 certificate is constructed but does not contain child DO.
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* We should notice this when building fake file system later. */
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-#define DO_CERT 0x7f21
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+#define DO_CERT 0x7f21
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+/* Maximum length for response buffer when reading pubkey. This value is calculated with
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+ * 4096-bit key length */
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+#define MAXLEN_RESP_PUBKEY 527
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+/* Gnuk only support 1 key length (2048 bit) */
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+#define MAXLEN_RESP_PUBKEY_GNUK 271
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#define DRVDATA(card) ((struct pgp_priv_data *) ((card)->drv_data))
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struct pgp_priv_data {
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@@ -729,6 +734,14 @@ pgp_read_blob(sc_card_t *card, struct blob *blob)
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u8 buffer[2048];
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size_t buf_len = (card->caps & SC_CARD_CAP_APDU_EXT)
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? sizeof(buffer) : 256;
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+
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+ /* Buffer length for Gnuk pubkey */
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+ if (card->type == SC_CARD_TYPE_OPENPGP_GNUK &&
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+ (blob->id == 0xa400 || blob->id == 0xb600 || blob->id == 0xb800
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+ || blob->id == 0xa401 || blob->id == 0xb601 || blob->id == 0xb801)) {
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+ buf_len = MAXLEN_RESP_PUBKEY_GNUK;
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+ }
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+
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int r = blob->info->get_fn(card, blob->id, buffer, buf_len);
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if (r < 0) { /* an error occurred */
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@@ -1830,6 +1843,7 @@ static int pgp_gen_key(sc_card_t *card, sc_cardctl_openpgp_keygen_info_t *key_in
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u8 apdu_case;
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u8 *apdu_data;
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size_t apdu_le;
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+ size_t resplen = 0;
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int r = SC_SUCCESS;
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LOG_FUNC_CALLED(card->ctx);
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@@ -1868,23 +1882,27 @@ static int pgp_gen_key(sc_card_t *card, sc_cardctl_openpgp_keygen_info_t *key_in
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apdu_case = SC_APDU_CASE_4_EXT;
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}
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else {
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- apdu_le = 256;
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apdu_case = SC_APDU_CASE_4_SHORT;
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+ apdu_le = 256;
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+ resplen = MAXLEN_RESP_PUBKEY;
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+ }
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+ if (card->type == SC_CARD_TYPE_OPENPGP_GNUK) {
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+ resplen = MAXLEN_RESP_PUBKEY_GNUK;
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}
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/* Prepare APDU */
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- sc_format_apdu(card, &apdu, apdu_case, 0x47, 0x80, 0);
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+ sc_format_apdu(card, &apdu, apdu_case, 0x47, 0x80, 0);
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apdu.data = apdu_data;
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apdu.datalen = 2; /* Data = B600 */
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apdu.lc = 2;
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apdu.le = apdu_le;
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/* Buffer to receive response */
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- apdu.resp = calloc(apdu.le, 1);
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+ apdu.resplen = (resplen > 0) ? resplen : apdu_le;
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+ apdu.resp = calloc(apdu.resplen, 1);
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if (apdu.resp == NULL) {
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LOG_FUNC_RETURN(card->ctx, SC_ERROR_NOT_ENOUGH_MEMORY);
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}
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- apdu.resplen = apdu.le;
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/* Send */
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sc_log(card->ctx, "Waiting for the card to generate key...");
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--
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1.9.3
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