From 93622f6486f5269368379d213f263e619b07b4fa Mon Sep 17 00:00:00 2001
From: frankmorgner <frankmorgner@96b47cad-a561-4643-ad3b-153ac7d7599c>
Date: Tue, 4 May 2010 07:57:13 +0000
Subject: [PATCH] changed length of read binary apdu to support acr 122

git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@87 96b47cad-a561-4643-ad3b-153ac7d7599c
---
 ccid/pace.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/ccid/pace.c b/ccid/pace.c
index a596c4d..531af15 100644
--- a/ccid/pace.c
+++ b/ccid/pace.c
@@ -222,6 +222,9 @@ static int get_ef_card_access(sc_card_t *card,
         __u8 **ef_cardaccess, size_t *length_ef_cardaccess)
 {
     int r;
+    /* we read less bytes than possible. this is a workaround for acr 122,
+     * which only supports apdus of max 250 bytes */
+    size_t read = maxresp - 8;
     sc_path_t path;
     sc_file_t *file = NULL;
     __u8 *p;
@@ -246,7 +249,7 @@ static int get_ef_card_access(sc_card_t *card,
 
     *length_ef_cardaccess = 0;
     while(1) {
-        p = realloc(*ef_cardaccess, *length_ef_cardaccess + maxresp);
+        p = realloc(*ef_cardaccess, *length_ef_cardaccess + read);
         if (!p) {
             r = SC_ERROR_OUT_OF_MEMORY;
             goto err;
@@ -254,9 +257,9 @@ static int get_ef_card_access(sc_card_t *card,
         *ef_cardaccess = p;
 
         r = sc_read_binary(card, *length_ef_cardaccess,
-                *ef_cardaccess + *length_ef_cardaccess, maxresp, 0);
+                *ef_cardaccess + *length_ef_cardaccess, read, 0);
 
-        if (r > 0 && r != maxresp) {
+        if (r > 0 && r != read) {
             *length_ef_cardaccess += r;
             break;
         }