--- /dev/null
+/*
+ * implement the applets for the CAC card.
+ *
+ * This code is licensed under the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#include "glib-compat.h"
+
+#include <string.h>
+#include <stdbool.h>
+
+#include "cac.h"
+#include "vcard.h"
+#include "vcard_emul.h"
+#include "card_7816.h"
+
+/* private data for PKI applets */
+typedef struct CACPKIAppletDataStruct {
+ unsigned char *cert;
+ int cert_len;
+ unsigned char *cert_buffer;
+ int cert_buffer_len;
+ unsigned char *sign_buffer;
+ int sign_buffer_len;
+ VCardKey *key;
+} CACPKIAppletData;
+
+/*
+ * CAC applet private data
+ */
+struct VCardAppletPrivateStruct {
+ union {
+ CACPKIAppletData pki_data;
+ void *reserved;
+ } u;
+};
+
+/*
+ * handle all the APDU's that are common to all CAC applets
+ */
+static VCardStatus
+cac_common_process_apdu(VCard *card, VCardAPDU *apdu, VCardResponse **response)
+{
+ int ef;
+ VCardStatus ret = VCARD_FAIL;
+
+ switch (apdu->a_ins) {
+ case VCARD7816_INS_SELECT_FILE:
+ if (apdu->a_p1 != 0x02) {
+ /* let the 7816 code handle applet switches */
+ ret = VCARD_NEXT;
+ break;
+ }
+ /* handle file id setting */
+ if (apdu->a_Lc != 2) {
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_DATA_INVALID);
+ ret = VCARD_DONE;
+ break;
+ }
+ /* CAC 1.0 only supports ef = 0 */
+ ef = apdu->a_body[0] | (apdu->a_body[1] << 8);
+ if (ef != 0) {
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_FILE_NOT_FOUND);
+ ret = VCARD_DONE;
+ break;
+ }
+ *response = vcard_make_response(VCARD7816_STATUS_SUCCESS);
+ ret = VCARD_DONE;
+ break;
+ case VCARD7816_INS_GET_RESPONSE:
+ case VCARD7816_INS_VERIFY:
+ /* let the 7816 code handle these */
+ ret = VCARD_NEXT;
+ break;
+ case CAC_GET_PROPERTIES:
+ case CAC_GET_ACR:
+ /* skip these for now, this will probably be needed */
+ *response = vcard_make_response(VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
+ ret = VCARD_DONE;
+ break;
+ default:
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
+ ret = VCARD_DONE;
+ break;
+ }
+ return ret;
+}
+
+/*
+ * reset the inter call state between applet selects
+ */
+static VCardStatus
+cac_applet_pki_reset(VCard *card, int channel)
+{
+ VCardAppletPrivate *applet_private;
+ CACPKIAppletData *pki_applet;
+ applet_private = vcard_get_current_applet_private(card, channel);
+ assert(applet_private);
+ pki_applet = &(applet_private->u.pki_data);
+
+ pki_applet->cert_buffer = NULL;
+ g_free(pki_applet->sign_buffer);
+ pki_applet->sign_buffer = NULL;
+ pki_applet->cert_buffer_len = 0;
+ pki_applet->sign_buffer_len = 0;
+ return VCARD_DONE;
+}
+
+static VCardStatus
+cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
+ VCardResponse **response)
+{
+ CACPKIAppletData *pki_applet;
+ VCardAppletPrivate *applet_private;
+ int size, next;
+ unsigned char *sign_buffer;
+ bool retain_sign_buffer = FALSE;
+ vcard_7816_status_t status;
+ VCardStatus ret = VCARD_FAIL;
+
+ applet_private = vcard_get_current_applet_private(card, apdu->a_channel);
+ assert(applet_private);
+ pki_applet = &(applet_private->u.pki_data);
+
+ switch (apdu->a_ins) {
+ case CAC_UPDATE_BUFFER:
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
+ ret = VCARD_DONE;
+ break;
+ case CAC_GET_CERTIFICATE:
+ if ((apdu->a_p2 != 0) || (apdu->a_p1 != 0)) {
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
+ break;
+ }
+ assert(pki_applet->cert != NULL);
+ size = apdu->a_Le;
+ if (pki_applet->cert_buffer == NULL) {
+ pki_applet->cert_buffer = pki_applet->cert;
+ pki_applet->cert_buffer_len = pki_applet->cert_len;
+ }
+ size = MIN(size, pki_applet->cert_buffer_len);
+ next = MIN(255, pki_applet->cert_buffer_len - size);
+ *response = vcard_response_new_bytes(
+ card, pki_applet->cert_buffer, size,
+ apdu->a_Le, next ?
+ VCARD7816_SW1_WARNING_CHANGE :
+ VCARD7816_SW1_SUCCESS,
+ next);
+ pki_applet->cert_buffer += size;
+ pki_applet->cert_buffer_len -= size;
+ if ((*response == NULL) || (next == 0)) {
+ pki_applet->cert_buffer = NULL;
+ }
+ if (*response == NULL) {
+ *response = vcard_make_response(
+ VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
+ }
+ ret = VCARD_DONE;
+ break;
+ case CAC_SIGN_DECRYPT:
+ if (apdu->a_p2 != 0) {
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
+ break;
+ }
+ size = apdu->a_Lc;
+
+ sign_buffer = g_realloc(pki_applet->sign_buffer,
+ pki_applet->sign_buffer_len + size);
+ memcpy(sign_buffer+pki_applet->sign_buffer_len, apdu->a_body, size);
+ size += pki_applet->sign_buffer_len;
+ switch (apdu->a_p1) {
+ case 0x80:
+ /* p1 == 0x80 means we haven't yet sent the whole buffer, wait for
+ * the rest */
+ pki_applet->sign_buffer = sign_buffer;
+ pki_applet->sign_buffer_len = size;
+ *response = vcard_make_response(VCARD7816_STATUS_SUCCESS);
+ retain_sign_buffer = TRUE;
+ break;
+ case 0x00:
+ /* we now have the whole buffer, do the operation, result will be
+ * in the sign_buffer */
+ status = vcard_emul_rsa_op(card, pki_applet->key,
+ sign_buffer, size);
+ if (status != VCARD7816_STATUS_SUCCESS) {
+ *response = vcard_make_response(status);
+ break;
+ }
+ *response = vcard_response_new(card, sign_buffer, size, apdu->a_Le,
+ VCARD7816_STATUS_SUCCESS);
+ if (*response == NULL) {
+ *response = vcard_make_response(
+ VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
+ }
+ break;
+ default:
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
+ break;
+ }
+ if (!retain_sign_buffer) {
+ g_free(sign_buffer);
+ pki_applet->sign_buffer = NULL;
+ pki_applet->sign_buffer_len = 0;
+ }
+ ret = VCARD_DONE;
+ break;
+ case CAC_READ_BUFFER:
+ /* new CAC call, go ahead and use the old version for now */
+ /* TODO: implement */
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
+ ret = VCARD_DONE;
+ break;
+ default:
+ ret = cac_common_process_apdu(card, apdu, response);
+ break;
+ }
+ return ret;
+}
+
+
+static VCardStatus
+cac_applet_id_process_apdu(VCard *card, VCardAPDU *apdu,
+ VCardResponse **response)
+{
+ VCardStatus ret = VCARD_FAIL;
+
+ switch (apdu->a_ins) {
+ case CAC_UPDATE_BUFFER:
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
+ ret = VCARD_DONE;
+ break;
+ case CAC_READ_BUFFER:
+ /* new CAC call, go ahead and use the old version for now */
+ /* TODO: implement */
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
+ ret = VCARD_DONE;
+ break;
+ default:
+ ret = cac_common_process_apdu(card, apdu, response);
+ break;
+ }
+ return ret;
+}
+
+
+/*
+ * TODO: if we ever want to support general CAC middleware, we will need to
+ * implement the various containers.
+ */
+static VCardStatus
+cac_applet_container_process_apdu(VCard *card, VCardAPDU *apdu,
+ VCardResponse **response)
+{
+ VCardStatus ret = VCARD_FAIL;
+
+ switch (apdu->a_ins) {
+ case CAC_READ_BUFFER:
+ case CAC_UPDATE_BUFFER:
+ *response = vcard_make_response(
+ VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
+ ret = VCARD_DONE;
+ break;
+ default:
+ ret = cac_common_process_apdu(card, apdu, response);
+ break;
+ }
+ return ret;
+}
+
+/*
+ * utilities for creating and destroying the private applet data
+ */
+static void
+cac_delete_pki_applet_private(VCardAppletPrivate *applet_private)
+{
+ CACPKIAppletData *pki_applet_data;
+
+ if (applet_private == NULL) {
+ return;
+ }
+ pki_applet_data = &(applet_private->u.pki_data);
+ g_free(pki_applet_data->cert);
+ g_free(pki_applet_data->sign_buffer);
+ if (pki_applet_data->key != NULL) {
+ vcard_emul_delete_key(pki_applet_data->key);
+ }
+ g_free(applet_private);
+}
+
+static VCardAppletPrivate *
+cac_new_pki_applet_private(const unsigned char *cert,
+ int cert_len, VCardKey *key)
+{
+ CACPKIAppletData *pki_applet_data;
+ VCardAppletPrivate *applet_private;
+
+ applet_private = g_new0(VCardAppletPrivate, 1);
+ pki_applet_data = &(applet_private->u.pki_data);
+ pki_applet_data->cert = (unsigned char *)g_malloc(cert_len+1);
+ /*
+ * if we want to support compression, then we simply change the 0 to a 1
+ * and compress the cert data with libz
+ */
+ pki_applet_data->cert[0] = 0; /* not compressed */
+ memcpy(&pki_applet_data->cert[1], cert, cert_len);
+ pki_applet_data->cert_len = cert_len+1;
+
+ pki_applet_data->key = key;
+ return applet_private;
+}
+
+
+/*
+ * create a new cac applet which links to a given cert
+ */
+static VCardApplet *
+cac_new_pki_applet(int i, const unsigned char *cert,
+ int cert_len, VCardKey *key)
+{
+ VCardAppletPrivate *applet_private;
+ VCardApplet *applet;
+ unsigned char pki_aid[] = { 0xa0, 0x00, 0x00, 0x00, 0x79, 0x01, 0x00 };
+ int pki_aid_len = sizeof(pki_aid);
+
+ pki_aid[pki_aid_len-1] = i;
+
+ applet_private = cac_new_pki_applet_private(cert, cert_len, key);
+ if (applet_private == NULL) {
+ goto failure;
+ }
+ applet = vcard_new_applet(cac_applet_pki_process_apdu, cac_applet_pki_reset,
+ pki_aid, pki_aid_len);
+ if (applet == NULL) {
+ goto failure;
+ }
+ vcard_set_applet_private(applet, applet_private,
+ cac_delete_pki_applet_private);
+ applet_private = NULL;
+
+ return applet;
+
+failure:
+ if (applet_private != NULL) {
+ cac_delete_pki_applet_private(applet_private);
+ }
+ return NULL;
+}
+
+
+static unsigned char cac_default_container_aid[] = {
+ 0xa0, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00 };
+static unsigned char cac_id_aid[] = {
+ 0xa0, 0x00, 0x00, 0x00, 0x79, 0x03, 0x00 };
+/*
+ * Initialize the cac card. This is the only public function in this file. All
+ * the rest are connected through function pointers.
+ */
+VCardStatus
+cac_card_init(VReader *reader, VCard *card,
+ const char *params,
+ unsigned char * const *cert,
+ int cert_len[],
+ VCardKey *key[] /* adopt the keys*/,
+ int cert_count)
+{
+ int i;
+ VCardApplet *applet;
+
+ /* CAC Cards are VM Cards */
+ vcard_set_type(card, VCARD_VM);
+
+ /* create one PKI applet for each cert */
+ for (i = 0; i < cert_count; i++) {
+ applet = cac_new_pki_applet(i, cert[i], cert_len[i], key[i]);
+ if (applet == NULL) {
+ goto failure;
+ }
+ vcard_add_applet(card, applet);
+ }
+
+ /* create a default blank container applet */
+ applet = vcard_new_applet(cac_applet_container_process_apdu,
+ NULL, cac_default_container_aid,
+ sizeof(cac_default_container_aid));
+ if (applet == NULL) {
+ goto failure;
+ }
+ vcard_add_applet(card, applet);
+
+ /* create a default blank container applet */
+ applet = vcard_new_applet(cac_applet_id_process_apdu,
+ NULL, cac_id_aid,
+ sizeof(cac_id_aid));
+ if (applet == NULL) {
+ goto failure;
+ }
+ vcard_add_applet(card, applet);
+ return VCARD_DONE;
+
+failure:
+ return VCARD_FAIL;
+}
+
Code Review / kvmfornfv.git / blobdiff