libcacard: initial commit

libcacard emulates a Common Access Card (CAC) which is a standard
for smartcards. It is used by the emulated ccid card introduced in
a following patch. Docs are available in docs/libcacard.txt

Signed-off-by: Alon Levy <alevy@redhat.com>

---

changes from v24->v25:
 * Fix out of tree builds.
 * Fix build with linux-user targets.

changes from v23->v24: (Jes Sorensen review 2)
 * Makefile.target: use obj-$(CONFIG_*) +=
 * remove unrequired includes, include qemu-common before qemu-thread
  * required adding #define NO_NSPR_10_SUPPORT (harmless)

changes from v22->v23:
 * configure fixes: (reported by Stefan Hajnoczi)
  * test a = b, not a == b (second isn't portable)
  * quote $source_path in case it contains spaces
   - this doesn't really help since there are many other places
     that need similar fixes, not introduced by this patch.

changes from v21->v22:
 * fix configure to not link libcacard if nss not found
    (reported by Stefan Hajnoczi)
 * fix vscclient linkage with simpletrace backend
    (reported by Stefan Hajnoczi)
 * card_7816.c: add missing break in ERROR_DATA_NOT_FOUND
    (reported by William van de Velde)

changes from v20->v21: (Jes Sorensen review)
 * use qemu infrastructure: qemu-thread, qemu-common (qemu_malloc
  and qemu_free), error_report
 * assert instead of ASSERT
 * cosmetic fixes
 * use strpbrk and isspace
 * add --disable-nss --enable-nss here, instead of in the final patch.
 * split vscclient, passthru and docs to following patches.

changes from v19->v20:
 * checkpatch.pl

changes from v15->v16:

Build:
 * don't erase self with distclean
 * fix make clean after make distclean
 * Makefile: make vscclient link quiet

Behavioral:
 * vcard_emul_nss: load coolkey in more situations
 * vscclient:
  * use hton,ntoh
  * send init on connect, only start vevent thread on response
  * read payload after header check, before type switch
  * remove Reconnect
  * update for vscard_common changes, empty Flush implementation

Style/Whitespace:
 * fix wrong variable usage
 * remove unused variable
 * use only C style comments
  * add copyright header
  * fix tabulation

Signed-off-by: Alon Levy <alevy@redhat.com>

libcacard: fix out of tree builds

1 files changed, 65 insertions, 0 deletions

diff --git a/libcacard/vcard_emul.h b/libcacard/vcard_emul.h
new file mode 100644
index 0000000000..963563f86d
--- /dev/null
+++ b/libcacard/vcard_emul.h
@@ -0,0 +1,65 @@
+/*
+ * This is the actual card emulator.
+ *
+ * These functions can be implemented in different ways on different platforms
+ * using the underlying system primitives. For Linux it uses NSS, though direct
+ * to PKCS #11, openssl+pkcs11, or even gnu crypto libraries+pkcs #11 could be
+ * used. On Windows CAPI could be used.
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#ifndef VCARD_EMUL_H
+#define VCARD_EMUL_H 1
+
+#include "card_7816t.h"
+#include "vcard.h"
+#include "vcard_emul_type.h"
+
+/*
+ * types
+ */
+typedef enum {
+    VCARD_EMUL_OK = 0,
+    VCARD_EMUL_FAIL,
+    /* return values by vcard_emul_init */
+    VCARD_EMUL_INIT_ALREADY_INITED,
+} VCardEmulError;
+
+/* options are emul specific. call card_emul_parse_args to change a string
+ * To an options struct */
+typedef struct VCardEmulOptionsStruct VCardEmulOptions;
+
+/*
+ * Login functions
+ */
+/* return the number of login attempts still possible on the card. if unknown,
+ * return -1 */
+int vcard_emul_get_login_count(VCard *card);
+/* login into the card, return the 7816 status word (sw2 || sw1) */
+vcard_7816_status_t vcard_emul_login(VCard *card, unsigned char *pin,
+                                     int pin_len);
+
+/*
+ * key functions
+ */
+/* delete a key */
+void vcard_emul_delete_key(VCardKey *key);
+/* RSA sign/decrypt with the key, signature happens 'in place' */
+vcard_7816_status_t vcard_emul_rsa_op(VCard *card, VCardKey *key,
+                                  unsigned char *buffer, int buffer_size);
+
+void vcard_emul_reset(VCard *card, VCardPower power);
+void vcard_emul_get_atr(VCard *card, unsigned char *atr, int *atr_len);
+
+/* Re-insert of a card that has been removed by force removal */
+VCardEmulError vcard_emul_force_card_insert(VReader *vreader);
+/* Force a card removal even if the card is not physically removed */
+VCardEmulError vcard_emul_force_card_remove(VReader *vreader);
+
+VCardEmulOptions *vcard_emul_options(const char *args);
+VCardEmulError vcard_emul_init(const VCardEmulOptions *options);
+void vcard_emul_replay_insertion_events(void);
+void vcard_emul_usage(void);
+#endif