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1.1 root 1: /*
2: * implement the applets for the CAC card.
3: *
4: * This code is licensed under the GNU LGPL, version 2.1 or later.
5: * See the COPYING.LIB file in the top-level directory.
6: */
7:
8: #include "qemu-common.h"
9:
10: #include "cac.h"
11: #include "vcard.h"
12: #include "vcard_emul.h"
13: #include "card_7816.h"
14:
15: #define CAC_GET_PROPERTIES 0x56
16: #define CAC_GET_ACR 0x4c
17: #define CAC_READ_BUFFER 0x52
18: #define CAC_UPDATE_BUFFER 0x58
19: #define CAC_SIGN_DECRYPT 0x42
20: #define CAC_GET_CERTIFICATE 0x36
21:
22: /* private data for PKI applets */
23: typedef struct CACPKIAppletDataStruct {
24: unsigned char *cert;
25: int cert_len;
26: unsigned char *cert_buffer;
27: int cert_buffer_len;
28: unsigned char *sign_buffer;
29: int sign_buffer_len;
30: VCardKey *key;
31: } CACPKIAppletData;
32:
33: /*
34: * CAC applet private data
35: */
36: struct VCardAppletPrivateStruct {
37: union {
38: CACPKIAppletData pki_data;
39: void *reserved;
40: } u;
41: };
42:
43: /*
44: * handle all the APDU's that are common to all CAC applets
45: */
46: static VCardStatus
47: cac_common_process_apdu(VCard *card, VCardAPDU *apdu, VCardResponse **response)
48: {
49: int ef;
50:
51: switch (apdu->a_ins) {
52: case VCARD7816_INS_SELECT_FILE:
53: if (apdu->a_p1 != 0x02) {
54: /* let the 7816 code handle applet switches */
55: return VCARD_NEXT;
56: }
57: /* handle file id setting */
58: if (apdu->a_Lc != 2) {
59: *response = vcard_make_response(
60: VCARD7816_STATUS_ERROR_DATA_INVALID);
61: return VCARD_DONE;
62: }
63: /* CAC 1.0 only supports ef = 0 */
64: ef = apdu->a_body[0] | (apdu->a_body[1] << 8);
65: if (ef != 0) {
66: *response = vcard_make_response(
67: VCARD7816_STATUS_ERROR_FILE_NOT_FOUND);
68: return VCARD_DONE;
69: }
70: *response = vcard_make_response(VCARD7816_STATUS_SUCCESS);
71: return VCARD_DONE;
72: case VCARD7816_INS_GET_RESPONSE:
73: case VCARD7816_INS_VERIFY:
74: /* let the 7816 code handle these */
75: return VCARD_NEXT;
76: case CAC_GET_PROPERTIES:
77: case CAC_GET_ACR:
78: /* skip these for now, this will probably be needed */
79: *response = vcard_make_response(VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
80: return VCARD_DONE;
81: }
82: *response = vcard_make_response(
83: VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
84: return VCARD_DONE;
85: }
86:
87: /*
88: * reset the inter call state between applet selects
89: */
90: static VCardStatus
91: cac_applet_pki_reset(VCard *card, int channel)
92: {
93: VCardAppletPrivate *applet_private = NULL;
94: CACPKIAppletData *pki_applet = NULL;
95: applet_private = vcard_get_current_applet_private(card, channel);
96: assert(applet_private);
97: pki_applet = &(applet_private->u.pki_data);
98:
99: pki_applet->cert_buffer = NULL;
100: if (pki_applet->sign_buffer) {
101: qemu_free(pki_applet->sign_buffer);
102: pki_applet->sign_buffer = NULL;
103: }
104: pki_applet->cert_buffer_len = 0;
105: pki_applet->sign_buffer_len = 0;
106: return VCARD_DONE;
107: }
108:
109: static VCardStatus
110: cac_applet_pki_process_apdu(VCard *card, VCardAPDU *apdu,
111: VCardResponse **response)
112: {
113: CACPKIAppletData *pki_applet = NULL;
114: VCardAppletPrivate *applet_private = NULL;
115: int size, next;
116: unsigned char *sign_buffer;
117: vcard_7816_status_t status;
118:
119: applet_private = vcard_get_current_applet_private(card, apdu->a_channel);
120: assert(applet_private);
121: pki_applet = &(applet_private->u.pki_data);
122:
123: switch (apdu->a_ins) {
124: case CAC_UPDATE_BUFFER:
125: *response = vcard_make_response(
126: VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
127: return VCARD_DONE;
128: case CAC_GET_CERTIFICATE:
129: if ((apdu->a_p2 != 0) || (apdu->a_p1 != 0)) {
130: *response = vcard_make_response(
131: VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
132: break;
133: }
134: assert(pki_applet->cert != NULL);
135: size = apdu->a_Le;
136: if (pki_applet->cert_buffer == NULL) {
137: pki_applet->cert_buffer = pki_applet->cert;
138: pki_applet->cert_buffer_len = pki_applet->cert_len;
139: }
140: size = MIN(size, pki_applet->cert_buffer_len);
141: next = MIN(255, pki_applet->cert_buffer_len - size);
142: *response = vcard_response_new_bytes(
143: card, pki_applet->cert_buffer, size,
144: apdu->a_Le, next ?
145: VCARD7816_SW1_WARNING_CHANGE :
146: VCARD7816_SW1_SUCCESS,
147: next);
148: pki_applet->cert_buffer += size;
149: pki_applet->cert_buffer_len -= size;
150: if ((*response == NULL) || (next == 0)) {
151: pki_applet->cert_buffer = NULL;
152: }
153: if (*response == NULL) {
154: *response = vcard_make_response(
155: VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
156: }
157: return VCARD_DONE;
158: case CAC_SIGN_DECRYPT:
159: if (apdu->a_p2 != 0) {
160: *response = vcard_make_response(
161: VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
162: break;
163: }
164: size = apdu->a_Lc;
165:
166: sign_buffer = realloc(pki_applet->sign_buffer,
167: pki_applet->sign_buffer_len+size);
168: if (sign_buffer == NULL) {
169: qemu_free(pki_applet->sign_buffer);
170: pki_applet->sign_buffer = NULL;
171: pki_applet->sign_buffer_len = 0;
172: *response = vcard_make_response(
173: VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
174: return VCARD_DONE;
175: }
176: memcpy(sign_buffer+pki_applet->sign_buffer_len, apdu->a_body, size);
177: size += pki_applet->sign_buffer_len;
178: switch (apdu->a_p1) {
179: case 0x80:
180: /* p1 == 0x80 means we haven't yet sent the whole buffer, wait for
181: * the rest */
182: pki_applet->sign_buffer = sign_buffer;
183: pki_applet->sign_buffer_len = size;
184: *response = vcard_make_response(VCARD7816_STATUS_SUCCESS);
185: return VCARD_DONE;
186: case 0x00:
187: /* we now have the whole buffer, do the operation, result will be
188: * in the sign_buffer */
189: status = vcard_emul_rsa_op(card, pki_applet->key,
190: sign_buffer, size);
191: if (status != VCARD7816_STATUS_SUCCESS) {
192: *response = vcard_make_response(status);
193: break;
194: }
195: *response = vcard_response_new(card, sign_buffer, size, apdu->a_Le,
196: VCARD7816_STATUS_SUCCESS);
197: if (*response == NULL) {
198: *response = vcard_make_response(
199: VCARD7816_STATUS_EXC_ERROR_MEMORY_FAILURE);
200: }
201: break;
202: default:
203: *response = vcard_make_response(
204: VCARD7816_STATUS_ERROR_P1_P2_INCORRECT);
205: break;
206: }
207: qemu_free(sign_buffer);
208: pki_applet->sign_buffer = NULL;
209: pki_applet->sign_buffer_len = 0;
210: return VCARD_DONE;
211: case CAC_READ_BUFFER:
212: /* new CAC call, go ahead and use the old version for now */
213: /* TODO: implement */
214: *response = vcard_make_response(
215: VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
216: return VCARD_DONE;
217: }
218: return cac_common_process_apdu(card, apdu, response);
219: }
220:
221:
222: static VCardStatus
223: cac_applet_id_process_apdu(VCard *card, VCardAPDU *apdu,
224: VCardResponse **response)
225: {
226: switch (apdu->a_ins) {
227: case CAC_UPDATE_BUFFER:
228: *response = vcard_make_response(
229: VCARD7816_STATUS_ERROR_CONDITION_NOT_SATISFIED);
230: return VCARD_DONE;
231: case CAC_READ_BUFFER:
232: /* new CAC call, go ahead and use the old version for now */
233: /* TODO: implement */
234: *response = vcard_make_response(
235: VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
236: return VCARD_DONE;
237: }
238: return cac_common_process_apdu(card, apdu, response);
239: }
240:
241:
242: /*
243: * TODO: if we ever want to support general CAC middleware, we will need to
244: * implement the various containers.
245: */
246: static VCardStatus
247: cac_applet_container_process_apdu(VCard *card, VCardAPDU *apdu,
248: VCardResponse **response)
249: {
250: switch (apdu->a_ins) {
251: case CAC_READ_BUFFER:
252: case CAC_UPDATE_BUFFER:
253: *response = vcard_make_response(
254: VCARD7816_STATUS_ERROR_COMMAND_NOT_SUPPORTED);
255: return VCARD_DONE;
256: default:
257: break;
258: }
259: return cac_common_process_apdu(card, apdu, response);
260: }
261:
262: /*
263: * utilities for creating and destroying the private applet data
264: */
265: static void
266: cac_delete_pki_applet_private(VCardAppletPrivate *applet_private)
267: {
268: CACPKIAppletData *pki_applet_data = NULL;
269: if (pki_applet_data == NULL) {
270: return;
271: }
272: pki_applet_data = &(applet_private->u.pki_data);
273: if (pki_applet_data->cert != NULL) {
274: qemu_free(pki_applet_data->cert);
275: }
276: if (pki_applet_data->sign_buffer != NULL) {
277: qemu_free(pki_applet_data->sign_buffer);
278: }
279: if (pki_applet_data->key != NULL) {
280: vcard_emul_delete_key(pki_applet_data->key);
281: }
282: qemu_free(applet_private);
283: }
284:
285: static VCardAppletPrivate *
286: cac_new_pki_applet_private(const unsigned char *cert,
287: int cert_len, VCardKey *key)
288: {
289: CACPKIAppletData *pki_applet_data = NULL;
290: VCardAppletPrivate *applet_private = NULL;
291: applet_private = (VCardAppletPrivate *)qemu_malloc(sizeof(VCardAppletPrivate));
292:
293: pki_applet_data = &(applet_private->u.pki_data);
294: pki_applet_data->cert_buffer = NULL;
295: pki_applet_data->cert_buffer_len = 0;
296: pki_applet_data->sign_buffer = NULL;
297: pki_applet_data->sign_buffer_len = 0;
298: pki_applet_data->key = NULL;
299: pki_applet_data->cert = (unsigned char *)qemu_malloc(cert_len+1);
300: /*
301: * if we want to support compression, then we simply change the 0 to a 1
302: * and compress the cert data with libz
303: */
304: pki_applet_data->cert[0] = 0; /* not compressed */
305: memcpy(&pki_applet_data->cert[1], cert, cert_len);
306: pki_applet_data->cert_len = cert_len+1;
307:
308: pki_applet_data->key = key;
309: return applet_private;
310: }
311:
312:
313: /*
314: * create a new cac applet which links to a given cert
315: */
316: static VCardApplet *
317: cac_new_pki_applet(int i, const unsigned char *cert,
318: int cert_len, VCardKey *key)
319: {
320: VCardAppletPrivate *applet_private = NULL;
321: VCardApplet *applet = NULL;
322: unsigned char pki_aid[] = { 0xa0, 0x00, 0x00, 0x00, 0x79, 0x01, 0x00 };
323: int pki_aid_len = sizeof(pki_aid);
324:
325: pki_aid[pki_aid_len-1] = i;
326:
327: applet_private = cac_new_pki_applet_private(cert, cert_len, key);
328: if (applet_private == NULL) {
329: goto failure;
330: }
331: applet = vcard_new_applet(cac_applet_pki_process_apdu, cac_applet_pki_reset,
332: pki_aid, pki_aid_len);
333: if (applet == NULL) {
334: goto failure;
335: }
336: vcard_set_applet_private(applet, applet_private,
337: cac_delete_pki_applet_private);
338: applet_private = NULL;
339:
340: return applet;
341:
342: failure:
343: if (applet_private != NULL) {
344: cac_delete_pki_applet_private(applet_private);
345: }
346: return NULL;
347: }
348:
349:
350: static unsigned char cac_default_container_aid[] = {
351: 0xa0, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00 };
352: static unsigned char cac_id_aid[] = {
353: 0xa0, 0x00, 0x00, 0x00, 0x79, 0x03, 0x00 };
354: /*
355: * Initialize the cac card. This is the only public function in this file. All
356: * the rest are connected through function pointers.
357: */
358: VCardStatus
359: cac_card_init(VReader *reader, VCard *card,
360: const char *params,
361: unsigned char * const *cert,
362: int cert_len[],
363: VCardKey *key[] /* adopt the keys*/,
364: int cert_count)
365: {
366: int i;
367: VCardApplet *applet;
368:
369: /* CAC Cards are VM Cards */
370: vcard_set_type(card, VCARD_VM);
371:
372: /* create one PKI applet for each cert */
373: for (i = 0; i < cert_count; i++) {
374: applet = cac_new_pki_applet(i, cert[i], cert_len[i], key[i]);
375: if (applet == NULL) {
376: goto failure;
377: }
378: vcard_add_applet(card, applet);
379: }
380:
381: /* create a default blank container applet */
382: applet = vcard_new_applet(cac_applet_container_process_apdu,
383: NULL, cac_default_container_aid,
384: sizeof(cac_default_container_aid));
385: if (applet == NULL) {
386: goto failure;
387: }
388: vcard_add_applet(card, applet);
389:
390: /* create a default blank container applet */
391: applet = vcard_new_applet(cac_applet_id_process_apdu,
392: NULL, cac_id_aid,
393: sizeof(cac_id_aid));
394: if (applet == NULL) {
395: goto failure;
396: }
397: vcard_add_applet(card, applet);
398: return VCARD_DONE;
399:
400: failure:
401: return VCARD_FAIL;
402: }
403:
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