From bfcd6dafbbb55b0c75a8731f86013201e9622969 Mon Sep 17 00:00:00 2001
From: frankmorgner <frankmorgner@96b47cad-a561-4643-ad3b-153ac7d7599c>
Date: Thu, 3 Jun 2010 22:17:18 +0000
Subject: [PATCH] added error messages

git-svn-id: https://vsmartcard.svn.sourceforge.net/svnroot/vsmartcard@128 96b47cad-a561-4643-ad3b-153ac7d7599c
---
 ccid/src/sm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ccid/src/sm.c b/ccid/src/sm.c
index 4044d57..3e38f24 100644
--- a/ccid/src/sm.c
+++ b/ccid/src/sm.c
@@ -498,6 +498,7 @@ static int sm_decrypt(const struct sm_ctx *ctx, sc_card_t *card,
         if (r < 0)
             goto err;
     } else {
+        sc_error(card->ctx, "Cryptographic Checksum missing");
         r = SC_ERROR_ASN1_OBJECT_NOT_FOUND;
         goto err;
     }
@@ -514,8 +515,10 @@ static int sm_decrypt(const struct sm_ctx *ctx, sc_card_t *card,
         buf_len = r;
 
         r = no_padding(ctx->padding_indicator, data, buf_len);
-        if (r < 0)
+        if (r < 0) {
+            sc_error(card->ctx, "Could not remove padding");
             goto err;
+        }
 
         if (apdu->resplen < r) {
             sc_error(card->ctx, "Response of SM APDU too long");
@@ -537,6 +540,7 @@ static int sm_decrypt(const struct sm_ctx *ctx, sc_card_t *card,
         apdu->sw1 = sw[0];
         apdu->sw2 = sw[1];
     } else {
+        sc_error(card->ctx, "Authenticated status bytes are missing");
         r = SC_ERROR_ASN1_OBJECT_NOT_FOUND;
         goto err;
     }