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libcacard/cac: change big switch functions to single return point

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Signed-off-by: Alon Levy <alevy@redhat.com>
Reviewed-by: Marc-André Lureau <mlureau@redhat.com>
This commit is contained in:
Alon Levy 2013-03-04 21:43:36 +02:00
parent 58aeda15ab
commit 57f97834ef
1 changed files with 52 additions and 21 deletions
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73
libcacard/cac.c
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@ -40,41 +40,51 @@ 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 */
return VCARD_NEXT;
ret = VCARD_NEXT;
break;
}
/* handle file id setting */
if (apdu->a_Lc != 2) {
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_DATA_INVALID);
return VCARD_DONE;
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);
return VCARD_DONE;
ret = VCARD_DONE;
break;
}
*response = vcard_make_response(VCARD7816_STATUS_SUCCESS);
return VCARD_DONE;
ret = VCARD_DONE;
break;
case VCARD7816_INS_GET_RESPONSE:
case VCARD7816_INS_VERIFY:
/* let the 7816 code handle these */
return VCARD_NEXT;
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);
return VCARD_DONE;
ret = VCARD_DONE;
break;
default:
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
ret = VCARD_DONE;
break;
}
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
return VCARD_DONE;
return ret;
}
/*
@ -108,6 +118,7 @@ cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
int size, next;
unsigned char *sign_buffer;
vcard_7816_status_t status;
VCardStatus ret = VCARD_FAIL;
applet_private = vcard_get_current_applet_private(card, apdu->a_channel);
assert(applet_private);
@ -117,7 +128,8 @@ cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
case CAC_UPDATE_BUFFER:
*response = vcard_make_response(
VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
return VCARD_DONE;
ret = VCARD_DONE;
break;
case CAC_GET_CERTIFICATE:
if ((apdu->a_p2 != 0) || (apdu->a_p1 != 0)) {
*response = vcard_make_response(
@ -147,7 +159,8 @@ cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
*response = vcard_make_response(
VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
}
return VCARD_DONE;
ret = VCARD_DONE;
break;
case CAC_SIGN_DECRYPT:
if (apdu->a_p2 != 0) {
*response = vcard_make_response(
@ -164,7 +177,8 @@ cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
pki_applet->sign_buffer_len = 0;
*response = vcard_make_response(
VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
return VCARD_DONE;
ret = VCARD_DONE;
break;
}
memcpy(sign_buffer+pki_applet->sign_buffer_len, apdu->a_body, size);
size += pki_applet->sign_buffer_len;
@ -175,7 +189,8 @@ cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
pki_applet->sign_buffer = sign_buffer;
pki_applet->sign_buffer_len = size;
*response = vcard_make_response(VCARD7816_STATUS_SUCCESS);
return VCARD_DONE;
ret = VCARD_DONE;
break;
case 0x00:
/* we now have the whole buffer, do the operation, result will be
* in the sign_buffer */
@ -200,15 +215,20 @@ cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
g_free(sign_buffer);
pki_applet->sign_buffer = NULL;
pki_applet->sign_buffer_len = 0;
return VCARD_DONE;
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);
return VCARD_DONE;
ret = VCARD_DONE;
break;
default:
ret = cac_common_process_apdu(card, apdu, response);
break;
}
return cac_common_process_apdu(card, apdu, response);
return ret;
}
@ -216,19 +236,26 @@ 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);
return VCARD_DONE;
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);
return VCARD_DONE;
ret = VCARD_DONE;
break;
default:
ret = cac_common_process_apdu(card, apdu, response);
break;
}
return cac_common_process_apdu(card, apdu, response);
return ret;
}
@ -240,16 +267,20 @@ 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);
return VCARD_DONE;
ret = VCARD_DONE;
break;
default:
ret = cac_common_process_apdu(card, apdu, response);
break;
}
return cac_common_process_apdu(card, apdu, response);
return ret;
}
/*