aacs.c 41.6 KB
Newer Older
1 2
/*
 * This file is part of libaacs
3
 * Copyright (C) 2009-2010  Obliter0n
4
 * Copyright (C) 2009-2013  npzacs
5
 *
gates's avatar
gates committed
6 7 8 9
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
10
 *
gates's avatar
gates committed
11
 * This library is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
gates's avatar
gates committed
13 14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
15
 *
gates's avatar
gates committed
16 17 18
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see
 * <http://www.gnu.org/licenses/>.
19 20
 */

npzacs's avatar
npzacs committed
21 22 23 24
#if HAVE_CONFIG_H
#include "config.h"
#endif

npzacs's avatar
npzacs committed
25
#include "util/attributes.h"
npzacs's avatar
npzacs committed
26

npzacs's avatar
npzacs committed
27
#include "aacs-version.h"
cRTrn13's avatar
cRTrn13 committed
28
#include "aacs.h"
npzacs's avatar
npzacs committed
29 30
#include "cci.h"
#include "cci_data.h"
npzacs's avatar
npzacs committed
31
#include "content_cert.h"
32
#include "crypto.h"
cRTrn13's avatar
cRTrn13 committed
33
#include "mmc.h"
34
#include "mkb.h"
gates's avatar
gates committed
35
#include "file/file.h"
gates's avatar
gates committed
36
#include "file/keydbcfg.h"
37 38
#include "util/macro.h"
#include "util/logging.h"
39
#include "util/strutl.h"
cRTrn13's avatar
cRTrn13 committed
40

41
#include <inttypes.h>
42
#include <string.h>
43
#include <stdio.h>
npzacs's avatar
npzacs committed
44 45 46
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
47
#include <gcrypt.h>
48

npzacs's avatar
npzacs committed
49

npzacs's avatar
npzacs committed
50 51 52 53
#define SECTOR_LEN       2048  /* bus encryption block size */
#define ALIGNED_UNIT_LEN 6144  /* aacs block size */


npzacs's avatar
npzacs committed
54
struct aacs {
npzacs's avatar
npzacs committed
55 56 57
    void           *fopen_handle;
    AACS_FILE_OPEN2 fopen;

npzacs's avatar
npzacs committed
58 59 60 61 62
    /* current disc */
    char     *path;
    int       mkb_version;
    uint8_t   disc_id[20];

63 64
    /* VID is cached for BD-J */
    uint8_t   vid[16];
65 66
    /* PMSN is cached for BD-J */
    uint8_t   pmsn[16];
npzacs's avatar
npzacs committed
67 68
    /* Media key is cached for BD+ */
    uint8_t   mk[16];
npzacs's avatar
npzacs committed
69 70 71 72

    /* unit key for each CPS unit */
    uint32_t  num_uks;
    uint8_t  *uks;
npzacs's avatar
npzacs committed
73

npzacs's avatar
npzacs committed
74 75
    /* CPS unit of currently selected title */
    uint16_t  current_cps_unit;
76
    uint8_t   cps_unit_selected;
npzacs's avatar
npzacs committed
77 78 79 80

    /* title -> CPS unit mappings */
    uint32_t  num_titles;
    uint16_t *cps_units;  /* [0] = first play ; [1] = top menu ; [2] = title 1 ... */
81 82 83 84

    /* bus encryption */
    int       bee;        /* bus encryption enabled flag in content certificate */
    int       bec;        /* bus encryption capable flag in drive certificate */
85
    uint8_t   read_data_key[16];
86

npzacs's avatar
npzacs committed
87 88 89
    /* content certificate */
    CONTENT_CERT *cc;

90 91 92
    /* AACS Online (BD-J) */
    uint8_t   device_nonce[16];
    uint8_t   device_binding_id[16];
npzacs's avatar
npzacs committed
93 94
};

95 96 97
static const uint8_t empty_key[20] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                       0x00, 0x00, 0x00, 0x00 };
98 99
static const uint8_t aacs_iv[16]   = { 0x0b, 0xa0, 0xf8, 0xdd, 0xfe, 0xa6, 0x1f, 0xb3,
                                       0xd8, 0xdf, 0x9f, 0x56, 0x6a, 0x05, 0x0f, 0x78 };
100

npzacs's avatar
npzacs committed
101 102 103 104
/*
 * Validate processing key using media key verification data
 */

105 106
static int _validate_pk(const uint8_t *pk,
                        const uint8_t *cvalue, const uint8_t *uv, const uint8_t *vd,
npzacs's avatar
npzacs committed
107
                        uint8_t *mk)
cRTrn13's avatar
cRTrn13 committed
108
{
109
    gcry_cipher_hd_t gcry_h;
npzacs's avatar
npzacs committed
110
    int a;
cRTrn13's avatar
cRTrn13 committed
111
    uint8_t dec_vd[16];
112
    char str[40];
cRTrn13's avatar
cRTrn13 committed
113

npzacs's avatar
npzacs committed
114
    BD_DEBUG(DBG_AACS, "Validate processing key %s...\n", str_print_hex(str, pk, 16));
npzacs's avatar
npzacs committed
115
    BD_DEBUG(DBG_AACS, " Using:\n");
npzacs's avatar
npzacs committed
116 117 118
    BD_DEBUG(DBG_AACS, "   UV: %s\n", str_print_hex(str, uv, 4));
    BD_DEBUG(DBG_AACS, "   cvalue: %s\n", str_print_hex(str, cvalue, 16));
    BD_DEBUG(DBG_AACS, "   Verification data: %s\n", str_print_hex(str, vd, 16));
119

120 121 122
    gcry_cipher_open(&gcry_h, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_ECB, 0);
    gcry_cipher_setkey(gcry_h, pk, 16);
    gcry_cipher_decrypt(gcry_h, mk, 16, cvalue, 16);
123

cRTrn13's avatar
cRTrn13 committed
124 125 126 127
    for (a = 0; a < 4; a++) {
        mk[a + 12] ^= uv[a];
    }

128 129 130
    gcry_cipher_setkey(gcry_h, mk, 16);
    gcry_cipher_decrypt (gcry_h, dec_vd, 16, vd, 16);
    gcry_cipher_close(gcry_h);
131

cRTrn13's avatar
cRTrn13 committed
132
    if (!memcmp(dec_vd, "\x01\x23\x45\x67\x89\xAB\xCD\xEF", 8)) {
npzacs's avatar
npzacs committed
133
        BD_DEBUG(DBG_AACS, "Processing key %s is valid!\n", str_print_hex(str, pk, 16));
npzacs's avatar
npzacs committed
134
        return AACS_SUCCESS;
cRTrn13's avatar
cRTrn13 committed
135 136
    }

npzacs's avatar
npzacs committed
137
    return AACS_ERROR_NO_PK;
cRTrn13's avatar
cRTrn13 committed
138
}
139

npzacs's avatar
npzacs committed
140 141 142 143
/*
 * Revocation lists
 */

144 145 146 147 148 149
static int _rl_verify_signature(const uint8_t *rl, size_t size)
{
    int    entries = MKINT_BE32(rl + 12 + 8);
    size_t len     = 12 + 12 + 8 * entries; /* type_and_version_rec=12, rl_header=12, rl=entries*8 */

    if (len + 40 > size) {
npzacs's avatar
npzacs committed
150
        BD_DEBUG(DBG_AACS, "revocation list size mismatch\n");
151 152 153 154 155 156
        return 0;
    }

    return crypto_aacs_verify_aacsla(rl + len, rl, len);
}

157 158 159 160 161 162
static void _save_rl(const char *name, uint32_t version, const uint8_t *version_rec,
                     const uint8_t *rl_rec, size_t rl_len)
{
    int len     = MKINT_BE24(rl_rec - 3);
    int entries = MKINT_BE32(rl_rec + 4); /* entries in first signature block */
    if (len < 4 || !entries) {
npzacs's avatar
npzacs committed
163
        BD_DEBUG(DBG_AACS | DBG_CRIT, "ignoring empty %s\n", name);
164 165 166 167 168 169 170 171 172 173 174
        return;
    }

    if (rl_rec && version_rec) {
        rl_rec -= 4;
        rl_len += 4;

        uint8_t *data = malloc(12 + rl_len);
        memcpy(data,      version_rec, 12);
        memcpy(data + 12, rl_rec,      rl_len);
        if (!_rl_verify_signature(data, rl_len + 12)) {
npzacs's avatar
npzacs committed
175
          BD_DEBUG(DBG_AACS | DBG_CRIT, "invalid %s signature, not using it\n", name);
176 177 178 179 180 181 182 183
        } else {
          cache_save(name, version, data, rl_len + 12);
        }
        X_FREE(data);
    }
}

static void _update_rl(MKB *mkb)
184 185 186
{
    uint32_t version = mkb_version(mkb);
    uint32_t cache_version;
187
    size_t   rl_len;
188

189
    if (!cache_get("drl", &cache_version, NULL, NULL, 0) || cache_version < version) {
190 191
        const uint8_t *version_rec = mkb_type_and_version_record(mkb);
        const uint8_t *drl_rec     = mkb_drive_revokation_entries(mkb, &rl_len);
npzacs's avatar
npzacs committed
192
        if (drl_rec && version_rec && rl_len > 8) {
193 194 195
            _save_rl("drl", version, version_rec, drl_rec, rl_len);
        }
    }
196
    if (!cache_get("hrl", &cache_version, NULL, NULL, 0) || cache_version < version) {
197 198
        const uint8_t *version_rec = mkb_type_and_version_record(mkb);
        const uint8_t *hrl_rec     = mkb_host_revokation_entries(mkb, &rl_len);
npzacs's avatar
npzacs committed
199
        if (hrl_rec && version_rec && rl_len > 8) {
200
            _save_rl("hrl", version, version_rec, hrl_rec, rl_len);
201 202 203 204
        }
    }
}

npzacs's avatar
npzacs committed
205 206 207 208
/*
 * Derive media key using full set of device keys
 */

209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247
static uint32_t _calc_v_mask(uint32_t uv)
{
    uint32_t v_mask = 0xffffffff;

    while (!(uv & ~v_mask)) {
        v_mask <<= 1;
    }

    return v_mask;
}

static void _calc_pk(const uint8_t *dk, uint8_t *pk, uint32_t uv, uint32_t v_mask, uint32_t dev_key_v_mask)
{
    unsigned char left_child[16], right_child[16];

    crypto_aesg3(dk, left_child, right_child, pk);

    while (dev_key_v_mask != v_mask) {

        int i;
        for (i = 31; i >= 0; i--) {
            if (!(dev_key_v_mask & (1ul << i))) {
                break;
            }
        }

        uint8_t curr_key[16];
        if (!(uv & (1ul << i))) {
            memcpy(curr_key, left_child, 16);
        } else {
            memcpy(curr_key, right_child, 16);
        }

        crypto_aesg3(curr_key, left_child, right_child, pk);

        dev_key_v_mask = ((int) dev_key_v_mask) >> 1;
    }

    char str[40];
npzacs's avatar
npzacs committed
248
    BD_DEBUG(DBG_AACS, "Processing key: %s\n",  str_print_hex(str, pk, 16));
249 250 251 252 253 254 255 256 257 258 259 260 261
}

static dk_list *_find_dk(dk_list *dkl, uint32_t *p_dev_key_v_mask, uint32_t uv, uint32_t u_mask)
{
    uint32_t device_number = dkl->node;
    uint32_t dev_key_uv, dev_key_u_mask, dev_key_v_mask;
    unsigned key_idx = 0;

    for (; dkl; dkl = dkl->next) {
        if (device_number != dkl->node) {
            /* wrong device */
            continue;
        }
npzacs's avatar
npzacs committed
262 263 264
        if (!dkl->uv) {
            continue;
        }
265 266 267 268 269 270 271 272 273 274 275 276
        key_idx++;
        dev_key_uv     = dkl->uv;
        dev_key_u_mask = 0xffffffff << dkl->u_mask_shift;
        dev_key_v_mask = _calc_v_mask(dev_key_uv);

        if ((u_mask == dev_key_u_mask) &&
            ((uv & dev_key_v_mask) == (dev_key_uv & dev_key_v_mask))) {
            break;
        }
    }

    if (!dkl) {
npzacs's avatar
npzacs committed
277
        BD_DEBUG(DBG_AACS | DBG_CRIT, "could not find applying device key (device 0x%x)\n", device_number);
278 279
    } else {
        char str[128];
npzacs's avatar
npzacs committed
280
        BD_DEBUG(DBG_AACS, "Applying device key is #%d %s\n", key_idx, str_print_hex(str, dkl->key, 16));
npzacs's avatar
npzacs committed
281
        BD_DEBUG(DBG_AACS, "  UV: 0x%08x  U mask: 0x%08x  V mask: 0x%08x\n", dev_key_uv, dev_key_u_mask, dev_key_v_mask);
282 283 284 285 286 287 288 289 290 291
        *p_dev_key_v_mask = dev_key_v_mask;
    }

    return dkl;
}

static int _calc_pk_mk(MKB *mkb, dk_list *dkl, uint8_t *mk)
{
    /* calculate processing key and media key using device keys */

npzacs's avatar
npzacs committed
292
    const uint8_t *uvs, *cvalues, *mk_dv;
293 294 295 296 297 298 299 300
    unsigned num_uvs;
    size_t len;
    char str[128];

    /* get mkb data */

    uvs     = mkb_subdiff_records(mkb, &len);
    cvalues = mkb_cvalues(mkb, &len);
npzacs's avatar
npzacs committed
301 302 303 304 305 306 307 308
    mk_dv   = mkb_mk_dv(mkb);

    if (!uvs || !cvalues || !mk_dv) {
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Missing MKB records (uvs %p, cvalues %p, mk_dv %p)\n",
                 (const void*)uvs, (const void*)cvalues, (const void*)mk_dv);
        return AACS_ERROR_CORRUPTED_DISC;
    }

309 310 311
    num_uvs = len / 5;

    if (num_uvs < 1) {
312
        BD_DEBUG(DBG_AACS | DBG_CRIT, "No UVS detected - corrupted disc\n");
313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
        return AACS_ERROR_CORRUPTED_DISC;
    }

    /* loop over all known devices */

    dk_list *dk_num;
    uint32_t device_number = (uint32_t)-1;

    for (dk_num = dkl; dk_num; dk_num = dk_num->next) {

        /* find next device */

        if (device_number == dk_num->node) {
            continue;
        }
328
        device_number = dk_num->node;
329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344

        /* find applying subset difference */

        unsigned uvs_idx;
        uint32_t u_mask, v_mask, uv;

        for (uvs_idx = 0; uvs_idx < num_uvs; uvs_idx++) {
            const uint8_t *p_uv = uvs + 1 + 5 * uvs_idx;
            uint8_t u_mask_shift = p_uv[-1];

            uv = MKINT_BE32(p_uv);
            if (!uv) {
                continue;
            }

            if (u_mask_shift & 0xc0) {
npzacs's avatar
npzacs committed
345
                BD_DEBUG(DBG_AACS | DBG_CRIT, "device 0x%x is revoked\n", device_number);
346 347 348 349 350 351 352 353 354 355 356 357 358 359
                uvs_idx = num_uvs;

            } else {

                u_mask = 0xffffffff << u_mask_shift;
                v_mask = _calc_v_mask(uv);

                if (((device_number & u_mask) == (uv & u_mask)) && ((device_number & v_mask) != (uv & v_mask))) {
                    break;
                }
            }
        }

        if (uvs_idx >= num_uvs) {
npzacs's avatar
npzacs committed
360
            BD_DEBUG(DBG_AACS | DBG_CRIT, "could not find applying subset-difference for device 0x%x\n", device_number);
361 362 363 364
            /* try next device */
            continue;
        }

npzacs's avatar
npzacs committed
365 366
        BD_DEBUG(DBG_AACS, "Applying subset-difference for device 0x%x is #%d:\n", device_number, uvs_idx);
        BD_DEBUG(DBG_AACS,"  UV: 0x%08x  U mask: 0x%08x  V mask: 0x%08x\n", uv, u_mask, v_mask);
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388

        /* find applying device key */

        uint32_t dev_key_v_mask = 0;
        dk_list *dk;

        dk = _find_dk(dk_num, &dev_key_v_mask, uv, u_mask);
        if (!dk) {
            /* try next device */
            continue;
        }

        /* calculate processing key */

        uint8_t pk[16];
        _calc_pk(dk->key, pk, uv, v_mask, dev_key_v_mask);

        /* calculate and verify media key */

        if ( _validate_pk(pk,
                          cvalues + uvs_idx * 16,
                          uvs + 1 + uvs_idx * 5,
npzacs's avatar
npzacs committed
389
                          mk_dv,
390 391 392
                          mk)
             == AACS_SUCCESS) {

npzacs's avatar
npzacs committed
393
            BD_DEBUG(DBG_AACS, "Media key: %s\n", str_print_hex(str, mk, 16));
394 395 396
            return AACS_SUCCESS;
        }

npzacs's avatar
npzacs committed
397
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Processing key %s is invalid!\n", str_print_hex(str, pk, 16));
398 399 400 401 402 403 404

        /* try next device */
    }

    return AACS_ERROR_NO_DK;
}

npzacs's avatar
npzacs committed
405 406 407 408
/*
 * file access utils
 */

npzacs's avatar
npzacs committed
409 410 411 412 413
static AACS_FILE_H *_file_open(AACS *aacs, const char *file)
{
    AACS_FILE_H *fp;
    char        *f_name;

npzacs's avatar
npzacs committed
414 415 416
    if (aacs->fopen) {
        return aacs->fopen(aacs->fopen_handle, file);
    }
npzacs's avatar
npzacs committed
417 418 419
    if (!aacs->path) {
        return NULL;
    }
npzacs's avatar
npzacs committed
420

npzacs's avatar
npzacs committed
421
    f_name = str_printf("%s" DIR_SEP "%s", aacs->path, file);
npzacs's avatar
npzacs committed
422 423 424
    if (!f_name) {
        return NULL;
    }
npzacs's avatar
npzacs committed
425 426 427 428 429 430
    fp = file_open(f_name, "rb");
    X_FREE(f_name);

    return fp;
}

npzacs's avatar
npzacs committed
431 432 433 434
static size_t _read_file(AACS *aacs, const char *file, void **data)
{
    AACS_FILE_H *fp = NULL;
    int64_t f_size;
npzacs's avatar
npzacs committed
435
    size_t size;
npzacs's avatar
npzacs committed
436 437 438 439 440 441 442 443 444

    *data = NULL;

    fp = _file_open(aacs, file);
    if (!fp) {
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Unable to open %s\n", file);
        return 0;
    }

npzacs's avatar
npzacs committed
445
    f_size = file_size(fp);
npzacs's avatar
npzacs committed
446 447 448
    size = f_size;
    if (f_size <= 0 || f_size != (int64_t)size) {
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Invalid size %"PRId64" for %s\n", f_size, file);
npzacs's avatar
npzacs committed
449 450 451
        file_close(fp);
        return 0;
    }
npzacs's avatar
npzacs committed
452

npzacs's avatar
npzacs committed
453
    *data = malloc(size);
npzacs's avatar
npzacs committed
454 455 456 457 458 459 460 461 462 463 464
    if (*data) {
        if (file_read(fp, *data, f_size) != f_size) {
            BD_DEBUG(DBG_AACS | DBG_CRIT, "Failed reading %s\n", file);
            X_FREE(*data);
        }
    } else {
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Out of memory\n");
    }

    file_close(fp);

npzacs's avatar
npzacs committed
465
    return *data ? size : 0;
npzacs's avatar
npzacs committed
466 467
}

npzacs's avatar
npzacs committed
468 469
static MKB *_mkb_open(AACS *aacs)
{
npzacs's avatar
npzacs committed
470 471 472
    size_t  size;
    void   *data;
    MKB    *mkb;
npzacs's avatar
npzacs committed
473

npzacs's avatar
npzacs committed
474
    size = _read_file(aacs, "AACS" DIR_SEP "MKB_RO.inf", &data);
475 476 477 478 479
    if (size < 4) {
        /* retry with backup file */
        X_FREE(data);
        size = _read_file(aacs, "AACS" DIR_SEP "DUPLICATE" DIR_SEP "MKB_RO.inf", &data);
    }
npzacs's avatar
npzacs committed
480 481 482
    if (size < 4) {
        X_FREE(data);
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Error reading MKB file (AACS/MKB_RO.inf)\n");
npzacs's avatar
npzacs committed
483 484 485
        return NULL;
    }

npzacs's avatar
npzacs committed
486 487 488 489
    mkb = mkb_init(data, size);
    if (!mkb) {
        X_FREE(data);
    }
npzacs's avatar
npzacs committed
490 491 492
    return mkb;
}

npzacs's avatar
npzacs committed
493 494 495 496
/*
 * Calculate media key using a set of processing keys
 */

497
static int _calc_mk(AACS *aacs, uint8_t *mk, pk_list *pkl, dk_list *dkl)
cRTrn13's avatar
keyfile  
cRTrn13 committed
498 499 500 501
{
    int a, num_uvs = 0;
    size_t len;
    MKB *mkb = NULL;
npzacs's avatar
npzacs committed
502
    const uint8_t *rec, *uvs, *mk_dv;
cRTrn13's avatar
keyfile  
cRTrn13 committed
503

504
    /* Skip if retrieved from config file */
505 506 507
    if (memcmp(mk, empty_key, 16)) {
        return AACS_SUCCESS;
    }
508

npzacs's avatar
npzacs committed
509
    BD_DEBUG(DBG_AACS, "Calculate media key...\n");
cRTrn13's avatar
cRTrn13 committed
510

npzacs's avatar
npzacs committed
511
    if ((mkb = _mkb_open(aacs))) {
512

npzacs's avatar
npzacs committed
513
        aacs->mkb_version = mkb_version(mkb);
514
        _update_rl(mkb);
515 516 517

        /* try device keys first */
        if (dkl && _calc_pk_mk(mkb, dkl, mk) == AACS_SUCCESS) {
npzacs's avatar
npzacs committed
518
            memcpy(aacs->mk, mk, sizeof(aacs->mk));
519 520 521 522
            mkb_close(mkb);
            return AACS_SUCCESS;
        }

npzacs's avatar
npzacs committed
523 524 525 526 527 528 529
        mk_dv = mkb_mk_dv(mkb);
        if (!mk_dv) {
            BD_DEBUG(DBG_AACS | DBG_CRIT, "Missing MKB DV record\n");
            mkb_close(mkb);
            return AACS_ERROR_CORRUPTED_DISC;
        }

npzacs's avatar
npzacs committed
530
        BD_DEBUG(DBG_AACS, "Get UVS...\n");
531 532 533 534 535 536 537 538
        uvs = mkb_subdiff_records(mkb, &len);
        rec = uvs;
        while (rec < uvs + len) {
            if (rec[0] & 0xc0)
                break;
            rec += 5;
            num_uvs++;
        }
cRTrn13's avatar
keyfile  
cRTrn13 committed
539

npzacs's avatar
npzacs committed
540
        BD_DEBUG(DBG_AACS, "Get cvalues...\n");
541
        rec = mkb_cvalues(mkb, &len);
npzacs's avatar
npzacs committed
542 543 544 545 546
        if (!rec) {
            BD_DEBUG(DBG_AACS | DBG_CRIT, "Missing MKB CVALUES record\n");
            mkb_close(mkb);
            return AACS_ERROR_CORRUPTED_DISC;
        }
547

npzacs's avatar
npzacs committed
548
        for (; pkl; pkl = pkl->next) {
npzacs's avatar
npzacs committed
549
                BD_DEBUG(DBG_AACS, "Trying processing key...\n");
550 551

                for (a = 0; a < num_uvs; a++) {
npzacs's avatar
npzacs committed
552
                    if (AACS_SUCCESS == _validate_pk(pkl->key, rec + a * 16, uvs + 1 + a * 5, mk_dv, mk)) {
553
                        mkb_close(mkb);
554

555
                        char str[40];
npzacs's avatar
npzacs committed
556
                        BD_DEBUG(DBG_AACS, "Media key: %s\n", str_print_hex(str, mk, 16));
npzacs's avatar
npzacs committed
557
                        memcpy(aacs->mk, mk, sizeof(aacs->mk));
npzacs's avatar
npzacs committed
558
                        return AACS_SUCCESS;
559 560
                    }
                }
cRTrn13's avatar
keyfile  
cRTrn13 committed
561 562
            }

563
        mkb_close(mkb);
cRTrn13's avatar
keyfile  
cRTrn13 committed
564

npzacs's avatar
npzacs committed
565
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Error calculating media key. Missing right processing key ?\n");
npzacs's avatar
npzacs committed
566
        return AACS_ERROR_NO_PK;
npzacs's avatar
npzacs committed
567
    }
npzacs's avatar
npzacs committed
568

569
    BD_DEBUG(DBG_AACS | DBG_CRIT, "Error calculating media key - corrupted disc\n");
npzacs's avatar
npzacs committed
570
    return AACS_ERROR_CORRUPTED_DISC;
cRTrn13's avatar
keyfile  
cRTrn13 committed
571
}
572

npzacs's avatar
npzacs committed
573 574 575 576
/*
 * MMC device access
 */

npzacs's avatar
npzacs committed
577
static int _mmc_read_auth(AACS *aacs, cert_list *hcl, int type, uint8_t *p1, uint8_t *p2)
cRTrn13's avatar
openssl  
cRTrn13 committed
578
{
cRTrn13's avatar
cRTrn13 committed
579
    MMC* mmc = NULL;
npzacs's avatar
npzacs committed
580
    if (!(mmc = mmc_open(aacs->path))) {
npzacs's avatar
npzacs committed
581
        return AACS_ERROR_MMC_OPEN;
582 583
    }

npzacs's avatar
npzacs committed
584 585
    int error_code = AACS_ERROR_NO_CERT;

586
    const uint8_t *drive_cert = mmc_get_drive_cert(mmc);
587

npzacs's avatar
npzacs committed
588
    for (; hcl ; hcl = hcl->next) {
589 590 591

        char tmp_str[2*92+1];

npzacs's avatar
npzacs committed
592
        if (!crypto_aacs_verify_host_cert(hcl->host_cert)) {
npzacs's avatar
npzacs committed
593
            BD_DEBUG(DBG_AACS, "Not using invalid host certificate %s.\n",
npzacs's avatar
npzacs committed
594
                  str_print_hex(tmp_str, hcl->host_cert, 92));
npzacs's avatar
npzacs committed
595 596
            continue;
        }
597

npzacs's avatar
npzacs committed
598
        if (drive_cert && (drive_cert[1] & 0x01) && !(hcl->host_cert[1] & 0x01)) {
npzacs's avatar
npzacs committed
599
            BD_DEBUG(DBG_AACS, "Certificate (id 0x%s) does not support bus encryption\n",
npzacs's avatar
npzacs committed
600
                  str_print_hex(tmp_str, hcl->host_cert + 4, 6));
601 602 603
            //continue;
        }

npzacs's avatar
npzacs committed
604
        BD_DEBUG(DBG_AACS, "Trying host certificate (id 0x%s)...\n",
npzacs's avatar
npzacs committed
605
              str_print_hex(tmp_str, hcl->host_cert + 4, 6));
606

npzacs's avatar
npzacs committed
607
        int mmc_result = mmc_read_auth(mmc, hcl->host_priv_key, hcl->host_cert, type, p1, p2);
npzacs's avatar
npzacs committed
608 609 610 611 612 613 614 615 616 617 618
        switch (mmc_result) {
            case MMC_SUCCESS:
                mmc_close(mmc);
                return AACS_SUCCESS;
            case MMC_ERROR_CERT_REVOKED:
                error_code = AACS_ERROR_CERT_REVOKED;
                break;
            case MMC_ERROR:
            default:
                error_code = AACS_ERROR_MMC_FAILURE;
                break;
619 620 621 622 623
        }
    }

    mmc_close(mmc);

npzacs's avatar
npzacs committed
624
    return error_code;
625
}
cRTrn13's avatar
openssl  
cRTrn13 committed
626

npzacs's avatar
npzacs committed
627
static int _read_vid(AACS *aacs, cert_list *hcl)
628
{
npzacs's avatar
npzacs committed
629
    /* Use VID given in config file if available */
npzacs's avatar
npzacs committed
630
    if (memcmp(aacs->vid, empty_key, sizeof(aacs->vid))) {
npzacs's avatar
npzacs committed
631
        return AACS_SUCCESS;
632 633
    }

npzacs's avatar
npzacs committed
634 635
    int error_code = _mmc_read_auth(aacs, hcl, MMC_READ_VID, aacs->vid, NULL);
    if (error_code != AACS_SUCCESS) {
npzacs's avatar
npzacs committed
636
        BD_DEBUG(DBG_AACS, "Error reading VID!\n");
npzacs's avatar
npzacs committed
637 638 639
    } else {
        /* cache vid */
        keycache_save("vid", aacs->disc_id, aacs->vid, 16);
640 641 642 643
    }
    return error_code;
}

npzacs's avatar
npzacs committed
644
static int _read_read_data_key(AACS *aacs, cert_list *hcl)
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
645
{
npzacs's avatar
npzacs committed
646 647
    int error_code = _mmc_read_auth(aacs, hcl, MMC_READ_DATA_KEYS, aacs->read_data_key, NULL);
    if (error_code != AACS_SUCCESS) {
npzacs's avatar
npzacs committed
648
        BD_DEBUG(DBG_AACS, "Error reading data keys!\n");
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
649
    }
npzacs's avatar
npzacs committed
650 651
    return error_code;
}
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
652

npzacs's avatar
npzacs committed
653 654 655 656
static int _read_pmsn(AACS *aacs, cert_list *hcl)
{
    int error_code = _mmc_read_auth(aacs, hcl, MMC_READ_PMSN, aacs->pmsn, NULL);
    if (error_code != AACS_SUCCESS) {
npzacs's avatar
npzacs committed
657
        BD_DEBUG(DBG_AACS, "Error reading PMSN!\n");
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
658 659 660 661
    }
    return error_code;
}

npzacs's avatar
npzacs committed
662 663 664 665
/*
 * Unit key calculation
 */

666
static int _calc_vuk(AACS *aacs, uint8_t *mk, uint8_t *vuk, config_file *cf)
667
{
npzacs's avatar
npzacs committed
668 669
    int error_code;

670
    /* Skip if retrieved from config file */
671
    if (memcmp(vuk, empty_key, 16)) {
npzacs's avatar
npzacs committed
672
        BD_DEBUG(DBG_AACS, "Using VUK from config file\n");
npzacs's avatar
npzacs committed
673 674
        return AACS_SUCCESS;
    }
675

npzacs's avatar
npzacs committed
676
    /* get cached vuk */
677
    if (keycache_find("vuk", aacs->disc_id, vuk, 16)) {
npzacs's avatar
npzacs committed
678
        BD_DEBUG(DBG_AACS, "Using cached VUK\n");
npzacs's avatar
npzacs committed
679
        return AACS_SUCCESS;
npzacs's avatar
npzacs committed
680 681
    }

682 683 684 685
    if (!cf) {
        return AACS_ERROR_NO_CONFIG;
    }

686
    /* make sure we have media key */
687
    error_code = _calc_mk(aacs, mk, cf->pkl, cf->dkl);
npzacs's avatar
npzacs committed
688 689
    if (error_code != AACS_SUCCESS) {
        return error_code;
690 691
    }

npzacs's avatar
npzacs committed
692
    /* acquire VID */
693
    error_code = _read_vid(aacs, cf->host_cert_list);
npzacs's avatar
npzacs committed
694 695 696
    if (error_code != AACS_SUCCESS) {
        return error_code;
    }
697

npzacs's avatar
npzacs committed
698
    /* calculate VUK */
699

npzacs's avatar
npzacs committed
700
    crypto_aes128d(mk, aacs->vid, vuk);
701

npzacs's avatar
npzacs committed
702
    int a;
npzacs's avatar
npzacs committed
703
    for (a = 0; a < 16; a++) {
704
        vuk[a] ^= aacs->vid[a];
npzacs's avatar
npzacs committed
705
    }
706

npzacs's avatar
npzacs committed
707
    char str[40];
npzacs's avatar
npzacs committed
708
    BD_DEBUG(DBG_AACS, "Volume unique key: %s\n", str_print_hex(str, vuk, 16));
709

npzacs's avatar
npzacs committed
710
    /* cache vuk */
711
    keycache_save("vuk", aacs->disc_id, vuk, 16);
npzacs's avatar
npzacs committed
712

npzacs's avatar
npzacs committed
713
    return AACS_SUCCESS;
cRTrn13's avatar
openssl  
cRTrn13 committed
714 715
}

716 717
static uint16_t _read_u16(AACS_FILE_H *fp)
{
npzacs's avatar
npzacs committed
718
  uint8_t data[2] = {0, 0};
719 720 721 722 723 724 725 726 727 728 729

  file_read(fp, data, sizeof(uint16_t));

  return MKINT_BE16(data);
}

static void _read_uks_map(AACS *aacs, AACS_FILE_H *fp)
{
    uint16_t first_play, top_menu;
    unsigned i;

npzacs's avatar
npzacs committed
730
    BD_DEBUG(DBG_AACS, "Assigning CPS units to titles ...\n");
731 732 733 734 735 736 737 738 739

    X_FREE(aacs->cps_units);
    aacs->current_cps_unit = 0;

    file_seek(fp, 16 + 4, SEEK_SET);

    first_play = _read_u16(fp);
    top_menu   = _read_u16(fp);

npzacs's avatar
npzacs committed
740 741
    BD_DEBUG(DBG_AACS, "Title FP : CPS unit %d\n", first_play);
    BD_DEBUG(DBG_AACS, "Title TM : CPS unit %d\n", top_menu);
742 743 744 745 746 747 748 749 750

    aacs->num_titles   = _read_u16(fp);
    aacs->cps_units    = calloc(sizeof(uint16_t), aacs->num_titles + 2);
    aacs->cps_units[0] = first_play;
    aacs->cps_units[1] = top_menu;

    for (i = 2; i < aacs->num_titles + 2; i++) {
        _read_u16(fp); /* reserved */
        aacs->cps_units[i] = _read_u16(fp);
npzacs's avatar
npzacs committed
751
        BD_DEBUG(DBG_AACS, "Title %02d : CPS unit %d\n", i - 1, aacs->cps_units[i]);
752 753 754 755 756 757 758
    }

    /* validate */
    for (i = 0; i < aacs->num_titles + 2; i++) {
        if (aacs->cps_units[i])
            aacs->cps_units[i]--; /* number [1...N] --> index [0...N-1] */
        if (aacs->cps_units[i] >= aacs->num_uks) {
npzacs's avatar
npzacs committed
759
            BD_DEBUG(DBG_AACS, " *** Invalid CPS unit for title %d: %d !\n", (int) i - 1, aacs->cps_units[i]);
760 761 762 763 764
            aacs->cps_units[i] = 0;
        }
    }
}

npzacs's avatar
npzacs committed
765
/* Function that collects keys from keydb config entry */
766 767
static void _find_config_entry(AACS *aacs, title_entry_list *ce,
                               uint8_t *mk, uint8_t *vuk)
npzacs's avatar
npzacs committed
768 769
{
    char str[48];
770
    char str2[48];
npzacs's avatar
npzacs committed
771 772 773 774 775

    aacs->uks = NULL;
    aacs->num_uks = 0;

        while (ce && ce->entry.discid) {
npzacs's avatar
npzacs committed
776
            if (!memcmp(aacs->disc_id, ce->entry.discid, 20)) {
npzacs's avatar
npzacs committed
777
                BD_DEBUG(DBG_AACS, "Found config entry for discid %s\n",
npzacs's avatar
npzacs committed
778
                      str_print_hex(str, ce->entry.discid, 20));
npzacs's avatar
npzacs committed
779 780 781 782 783 784 785 786 787 788
                break;
            }

            ce = ce->next;
        }
        if (!ce) {
            return;
        }

        if (ce->entry.mek) {
789
            hexstring_to_hex_array(mk, 16, ce->entry.mek);
npzacs's avatar
npzacs committed
790

npzacs's avatar
npzacs committed
791
            BD_DEBUG(DBG_AACS, "Found media key for %s: %s\n",
792
                  str_print_hex(str2, ce->entry.discid, 20), str_print_hex(str, mk, 16));
npzacs's avatar
npzacs committed
793 794 795 796 797 798
        }

        if (ce->entry.vid) {
            hexstring_to_hex_array(aacs->vid, sizeof(aacs->vid),
                                    ce->entry.vid);

npzacs's avatar
npzacs committed
799
            BD_DEBUG(DBG_AACS, "Found volume id for %s: %s\n",
800
                  str_print_hex(str2, ce->entry.discid, 20), str_print_hex(str, aacs->vid, 16));
npzacs's avatar
npzacs committed
801 802
        }

npzacs's avatar
npzacs committed
803 804
        if (memcmp(ce->entry.vuk, empty_key, 16)) {
            memcpy(vuk, ce->entry.vuk, 16);
npzacs's avatar
npzacs committed
805

npzacs's avatar
npzacs committed
806
            BD_DEBUG(DBG_AACS, "Found volume unique key for %s: %s\n",
807
                  str_print_hex(str2, ce->entry.discid, 20), str_print_hex(str, vuk, 16));
npzacs's avatar
npzacs committed
808 809 810
        }

        if (ce->entry.uk) {
npzacs's avatar
npzacs committed
811
            BD_DEBUG(DBG_AACS, "Acquire CPS unit keys from keydb config file...\n");
npzacs's avatar
npzacs committed
812 813 814 815 816 817 818 819 820

            digit_key_pair_list *ukcursor = ce->entry.uk;
            while (ukcursor && ukcursor->key_pair.key) {
                aacs->num_uks++;

                aacs->uks = (uint8_t*)realloc(aacs->uks, 16 * aacs->num_uks);
                hexstring_to_hex_array(aacs->uks + (16 * (aacs->num_uks - 1)), 16,
                                      ukcursor->key_pair.key);

npzacs's avatar
npzacs committed
821
                BD_DEBUG(DBG_AACS, "Unit key %d from keydb entry: %s\n",
npzacs's avatar
npzacs committed
822
                      aacs->num_uks,
npzacs's avatar
npzacs committed
823
                      str_print_hex(str, aacs->uks + (16 * (aacs->num_uks - 1)), 16));
npzacs's avatar
npzacs committed
824 825 826 827 828 829

                ukcursor = ukcursor->next;
            }
        }
}

npzacs's avatar
npzacs committed
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
static size_t _read_cci_file(AACS *aacs, int cps_unit, void **data)
{
    char   *fname;
    size_t  size = 0;

    fname = str_printf("AACS" DIR_SEP "CPSUnit%05d.cci", cps_unit);
    if (fname) {
        size = _read_file(aacs, fname, data);
        X_FREE(fname);

        if (size >= 2048) {
            return size;
        }

        X_FREE(*data);
    }

    /* try backup copy */

    fname = str_printf("AACS" DIR_SEP "DUPLICATE" DIR_SEP "CPSUnit%05d.cci", cps_unit);
    if (fname) {
        size = _read_file(aacs, fname, data);
        X_FREE(fname);

        if (size >= 2048) {
            return size;
        }

        X_FREE(*data);
    }

    return 0;
}

static AACS_CCI *_read_cci(AACS *aacs, int cps_unit)
{
    AACS_CCI *cci;
    void     *data;
    size_t    size;

    size = _read_cci_file(aacs, cps_unit, &data);
    if (!size) {
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Failed to read CPS unit usage file %d\n", cps_unit);
        return NULL;
    }

    cci = cci_parse(data, size);
    X_FREE(data);

    return cci;
}

882 883 884 885 886 887 888 889 890 891 892 893 894
static int _check_cci_unencrypted(AACS *aacs, int cps_unit)
{
    int result = -1;

    AACS_CCI *cci = _read_cci(aacs, cps_unit);
    if (cci) {
        result = cci_is_unencrypted(cci);
        cci_free(&cci);
    }

    return result;
}

895
static int _calc_uks(AACS *aacs, config_file *cf)
cRTrn13's avatar
openssl  
cRTrn13 committed
896
{
897
    AACS_FILE_H *fp = NULL;
898
    uint8_t  buf[16];
899
    uint64_t f_pos;
900
    unsigned int i;
901 902
    int error_code = AACS_SUCCESS;
    int vuk_error_code;
cRTrn13's avatar
openssl  
cRTrn13 committed
903

904 905
    uint8_t mk[16] = {0}, vuk[16] = {0};

906
    if (cf) {
npzacs's avatar
npzacs committed
907
        BD_DEBUG(DBG_AACS, "Searching for keydb config entry...\n");
908
        _find_config_entry(aacs, cf->list, mk, vuk);
909

910 911 912 913
        /* Skip if retrieved from config file */
        if (aacs->uks) {
            return AACS_SUCCESS;
        }
914
    }
915

916 917
    /* Try to calculate VUK */
    vuk_error_code = _calc_vuk(aacs, mk, vuk, cf);
918

npzacs's avatar
npzacs committed
919
    BD_DEBUG(DBG_AACS, "Calculate CPS unit keys...\n");
920

npzacs's avatar
npzacs committed
921
    fp = _file_open(aacs, "AACS" DIR_SEP "Unit_Key_RO.inf");
npzacs's avatar
npzacs committed
922
    if (!fp) {
npzacs's avatar
npzacs committed
923
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Error opening unit key file (AACS/Unit_Key_RO.inf)\n");
npzacs's avatar
npzacs committed
924 925
        return AACS_ERROR_CORRUPTED_DISC;
    }
cRTrn13's avatar
openssl  
cRTrn13 committed
926

npzacs's avatar
npzacs committed
927 928
    if ((file_read(fp, buf, 4)) == 4) {
        f_pos = MKINT_BE32(buf);
npzacs's avatar
npzacs committed
929

npzacs's avatar
npzacs committed
930 931 932 933
        // Read number of keys
        file_seek(fp, f_pos, SEEK_SET);
        if ((file_read(fp, buf, 2)) == 2) {
            aacs->num_uks = MKINT_BE16(buf);
npzacs's avatar
npzacs committed
934

npzacs's avatar
npzacs committed
935 936
            X_FREE(aacs->uks);
            aacs->uks = calloc(aacs->num_uks, 16);