aacs.c 39.1 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 98
static const uint8_t empty_key[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const uint8_t aacs_iv[16]   = { 0x0b, 0xa0, 0xf8, 0xdd, 0xfe, 0xa6, 0x1f, 0xb3,
                                       0xd8, 0xdf, 0x9f, 0x56, 0x6a, 0x05, 0x0f, 0x78 };
99

100 101
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
102
                        uint8_t *mk)
cRTrn13's avatar
cRTrn13 committed
103
{
104
    gcry_cipher_hd_t gcry_h;
npzacs's avatar
npzacs committed
105
    int a;
cRTrn13's avatar
cRTrn13 committed
106
    uint8_t dec_vd[16];
107
    char str[40];
cRTrn13's avatar
cRTrn13 committed
108

npzacs's avatar
npzacs committed
109
    BD_DEBUG(DBG_AACS, "Validate processing key %s...\n", str_print_hex(str, pk, 16));
npzacs's avatar
npzacs committed
110
    BD_DEBUG(DBG_AACS, " Using:\n");
npzacs's avatar
npzacs committed
111 112 113
    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));
114

115 116 117
    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);
118

cRTrn13's avatar
cRTrn13 committed
119 120 121 122
    for (a = 0; a < 4; a++) {
        mk[a + 12] ^= uv[a];
    }

123 124 125
    gcry_cipher_setkey(gcry_h, mk, 16);
    gcry_cipher_decrypt (gcry_h, dec_vd, 16, vd, 16);
    gcry_cipher_close(gcry_h);
126

cRTrn13's avatar
cRTrn13 committed
127
    if (!memcmp(dec_vd, "\x01\x23\x45\x67\x89\xAB\xCD\xEF", 8)) {
npzacs's avatar
npzacs committed
128
        BD_DEBUG(DBG_AACS, "Processing key %s is valid!\n", str_print_hex(str, pk, 16));
npzacs's avatar
npzacs committed
129
        return AACS_SUCCESS;
cRTrn13's avatar
cRTrn13 committed
130 131
    }

npzacs's avatar
npzacs committed
132
    return AACS_ERROR_NO_PK;
cRTrn13's avatar
cRTrn13 committed
133
}
134

135 136 137 138 139 140
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
141
        BD_DEBUG(DBG_AACS, "revocation list size mismatch\n");
142 143 144 145 146 147
        return 0;
    }

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

148 149 150 151 152 153
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
154
        BD_DEBUG(DBG_AACS | DBG_CRIT, "ignoring empty %s\n", name);
155 156 157 158 159 160 161 162 163 164 165
        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
166
          BD_DEBUG(DBG_AACS | DBG_CRIT, "invalid %s signature, not using it\n", name);
167 168 169 170 171 172 173 174
        } else {
          cache_save(name, version, data, rl_len + 12);
        }
        X_FREE(data);
    }
}

static void _update_rl(MKB *mkb)
175 176 177
{
    uint32_t version = mkb_version(mkb);
    uint32_t cache_version;
178
    size_t   rl_len;
179

180
    if (!cache_get("drl", &cache_version, NULL, NULL, 0) || cache_version < version) {
181 182 183 184 185 186
        const uint8_t *version_rec = mkb_type_and_version_record(mkb);
        const uint8_t *drl_rec     = mkb_drive_revokation_entries(mkb, &rl_len);
        if (drl_rec && rl_len > 8) {
            _save_rl("drl", version, version_rec, drl_rec, rl_len);
        }
    }
187
    if (!cache_get("hrl", &cache_version, NULL, NULL, 0) || cache_version < version) {
188 189 190 191
        const uint8_t *version_rec = mkb_type_and_version_record(mkb);
        const uint8_t *hrl_rec     = mkb_host_revokation_entries(mkb, &rl_len);
        if (hrl_rec && rl_len > 8) {
            _save_rl("hrl", version, version_rec, hrl_rec, rl_len);
192 193 194 195
        }
    }
}

196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234
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
235
    BD_DEBUG(DBG_AACS, "Processing key: %s\n",  str_print_hex(str, pk, 16));
236 237 238 239 240 241 242 243 244 245 246 247 248
}

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
249 250 251
        if (!dkl->uv) {
            continue;
        }
252 253 254 255 256 257 258 259 260 261 262 263
        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
264
        BD_DEBUG(DBG_AACS | DBG_CRIT, "could not find applying device key (device 0x%x)\n", device_number);
265 266
    } else {
        char str[128];
npzacs's avatar
npzacs committed
267
        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
268
        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);
269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
        *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 */

    const uint8_t *uvs, *cvalues;
    unsigned num_uvs;
    size_t len;
    char str[128];

    /* get mkb data */

    uvs     = mkb_subdiff_records(mkb, &len);
    cvalues = mkb_cvalues(mkb, &len);
    num_uvs = len / 5;

    if (num_uvs < 1) {
291
        BD_DEBUG(DBG_AACS | DBG_CRIT, "No UVS detected - corrupted disc\n");
292 293 294 295 296 297 298 299 300 301 302 303 304 305 306
        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;
        }
307
        device_number = dk_num->node;
308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323

        /* 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
324
                BD_DEBUG(DBG_AACS | DBG_CRIT, "device 0x%x is revoked\n", device_number);
325 326 327 328 329 330 331 332 333 334 335 336 337 338
                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
339
            BD_DEBUG(DBG_AACS | DBG_CRIT, "could not find applying subset-difference for device 0x%x\n", device_number);
340 341 342 343
            /* try next device */
            continue;
        }

npzacs's avatar
npzacs committed
344 345
        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);
346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371

        /* 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,
                          mkb_mk_dv(mkb),
                          mk)
             == AACS_SUCCESS) {

npzacs's avatar
npzacs committed
372
            BD_DEBUG(DBG_AACS, "Media key: %s\n", str_print_hex(str, mk, 16));
373 374 375
            return AACS_SUCCESS;
        }

npzacs's avatar
npzacs committed
376
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Processing key %s is invalid!\n", str_print_hex(str, pk, 16));
377 378 379 380 381 382 383

        /* try next device */
    }

    return AACS_ERROR_NO_DK;
}

npzacs's avatar
npzacs committed
384 385 386 387 388
static AACS_FILE_H *_file_open(AACS *aacs, const char *file)
{
    AACS_FILE_H *fp;
    char        *f_name;

npzacs's avatar
npzacs committed
389 390 391
    if (aacs->fopen) {
        return aacs->fopen(aacs->fopen_handle, file);
    }
npzacs's avatar
npzacs committed
392 393 394
    if (!aacs->path) {
        return NULL;
    }
npzacs's avatar
npzacs committed
395

npzacs's avatar
npzacs committed
396
    f_name = str_printf("%s" DIR_SEP "%s", aacs->path, file);
npzacs's avatar
npzacs committed
397 398 399
    if (!f_name) {
        return NULL;
    }
npzacs's avatar
npzacs committed
400 401 402 403 404 405
    fp = file_open(f_name, "rb");
    X_FREE(f_name);

    return fp;
}

npzacs's avatar
npzacs committed
406 407 408 409
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
410
    size_t size;
npzacs's avatar
npzacs committed
411 412 413 414 415 416 417 418 419

    *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
420
    f_size = file_size(fp);
npzacs's avatar
npzacs committed
421 422 423
    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
424 425 426
        file_close(fp);
        return 0;
    }
npzacs's avatar
npzacs committed
427

npzacs's avatar
npzacs committed
428
    *data = malloc(size);
npzacs's avatar
npzacs committed
429 430 431 432 433 434 435 436 437 438 439
    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
440
    return *data ? size : 0;
npzacs's avatar
npzacs committed
441 442
}

npzacs's avatar
npzacs committed
443 444
static MKB *_mkb_open(AACS *aacs)
{
npzacs's avatar
npzacs committed
445 446 447
    size_t  size;
    void   *data;
    MKB    *mkb;
npzacs's avatar
npzacs committed
448

npzacs's avatar
npzacs committed
449 450 451 452
    size = _read_file(aacs, "AACS" DIR_SEP "MKB_RO.inf", &data);
    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
453 454 455
        return NULL;
    }

npzacs's avatar
npzacs committed
456 457 458 459
    mkb = mkb_init(data, size);
    if (!mkb) {
        X_FREE(data);
    }
npzacs's avatar
npzacs committed
460 461 462
    return mkb;
}

463
static int _calc_mk(AACS *aacs, uint8_t *mk, pk_list *pkl, dk_list *dkl)
cRTrn13's avatar
keyfile  
cRTrn13 committed
464 465 466 467
{
    int a, num_uvs = 0;
    size_t len;
    MKB *mkb = NULL;
468
    const uint8_t *rec, *uvs;
cRTrn13's avatar
keyfile  
cRTrn13 committed
469

470
    /* Skip if retrieved from config file */
471 472 473
    if (memcmp(mk, empty_key, 16)) {
        return AACS_SUCCESS;
    }
474

npzacs's avatar
npzacs committed
475
    BD_DEBUG(DBG_AACS, "Calculate media key...\n");
cRTrn13's avatar
cRTrn13 committed
476

npzacs's avatar
npzacs committed
477
    if ((mkb = _mkb_open(aacs))) {
478

npzacs's avatar
npzacs committed
479
        aacs->mkb_version = mkb_version(mkb);
480
        _update_rl(mkb);
481 482 483

        /* try device keys first */
        if (dkl && _calc_pk_mk(mkb, dkl, mk) == AACS_SUCCESS) {
npzacs's avatar
npzacs committed
484
            memcpy(aacs->mk, mk, sizeof(aacs->mk));
485 486 487 488
            mkb_close(mkb);
            return AACS_SUCCESS;
        }

npzacs's avatar
npzacs committed
489
        BD_DEBUG(DBG_AACS, "Get UVS...\n");
490 491 492 493 494 495 496 497
        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
498

npzacs's avatar
npzacs committed
499
        BD_DEBUG(DBG_AACS, "Get cvalues...\n");
500
        rec = mkb_cvalues(mkb, &len);
501

npzacs's avatar
npzacs committed
502
        for (; pkl; pkl = pkl->next) {
npzacs's avatar
npzacs committed
503
                BD_DEBUG(DBG_AACS, "Trying processing key...\n");
504 505

                for (a = 0; a < num_uvs; a++) {
npzacs's avatar
npzacs committed
506
                    if (AACS_SUCCESS == _validate_pk(pkl->key, rec + a * 16, uvs + 1 + a * 5,
507
                      mkb_mk_dv(mkb), mk)) {
508
                        mkb_close(mkb);
509

510
                        char str[40];
npzacs's avatar
npzacs committed
511
                        BD_DEBUG(DBG_AACS, "Media key: %s\n", str_print_hex(str, mk, 16));
npzacs's avatar
npzacs committed
512
                        memcpy(aacs->mk, mk, sizeof(aacs->mk));
npzacs's avatar
npzacs committed
513
                        return AACS_SUCCESS;
514 515
                    }
                }
cRTrn13's avatar
keyfile  
cRTrn13 committed
516 517
            }

518
        mkb_close(mkb);
cRTrn13's avatar
keyfile  
cRTrn13 committed
519

npzacs's avatar
npzacs committed
520
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Error calculating media key. Missing right processing key ?\n");
npzacs's avatar
npzacs committed
521
        return AACS_ERROR_NO_PK;
npzacs's avatar
npzacs committed
522
    }
npzacs's avatar
npzacs committed
523

524
    BD_DEBUG(DBG_AACS | DBG_CRIT, "Error calculating media key - corrupted disc\n");
npzacs's avatar
npzacs committed
525
    return AACS_ERROR_CORRUPTED_DISC;
cRTrn13's avatar
keyfile  
cRTrn13 committed
526
}
527

npzacs's avatar
npzacs committed
528
static int _mmc_read_auth(AACS *aacs, cert_list *hcl, int type, uint8_t *p1, uint8_t *p2)
cRTrn13's avatar
openssl  
cRTrn13 committed
529
{
cRTrn13's avatar
cRTrn13 committed
530
    MMC* mmc = NULL;
npzacs's avatar
npzacs committed
531
    if (!(mmc = mmc_open(aacs->path))) {
npzacs's avatar
npzacs committed
532
        return AACS_ERROR_MMC_OPEN;
533 534
    }

npzacs's avatar
npzacs committed
535 536
    int error_code = AACS_ERROR_NO_CERT;

537
    const uint8_t *drive_cert = mmc_get_drive_cert(mmc);
538

npzacs's avatar
npzacs committed
539
    for (; hcl ; hcl = hcl->next) {
540 541 542

        char tmp_str[2*92+1];

npzacs's avatar
npzacs committed
543
        if (!crypto_aacs_verify_host_cert(hcl->host_cert)) {
npzacs's avatar
npzacs committed
544
            BD_DEBUG(DBG_AACS, "Not using invalid host certificate %s.\n",
npzacs's avatar
npzacs committed
545
                  str_print_hex(tmp_str, hcl->host_cert, 92));
npzacs's avatar
npzacs committed
546 547
            continue;
        }
548

npzacs's avatar
npzacs committed
549
        if (drive_cert && (drive_cert[1] & 0x01) && !(hcl->host_cert[1] & 0x01)) {
npzacs's avatar
npzacs committed
550
            BD_DEBUG(DBG_AACS, "Certificate (id 0x%s) does not support bus encryption\n",
npzacs's avatar
npzacs committed
551
                  str_print_hex(tmp_str, hcl->host_cert + 4, 6));
552 553 554
            //continue;
        }

npzacs's avatar
npzacs committed
555
        BD_DEBUG(DBG_AACS, "Trying host certificate (id 0x%s)...\n",
npzacs's avatar
npzacs committed
556
              str_print_hex(tmp_str, hcl->host_cert + 4, 6));
557

npzacs's avatar
npzacs committed
558
        int mmc_result = mmc_read_auth(mmc, hcl->host_priv_key, hcl->host_cert, type, p1, p2);
npzacs's avatar
npzacs committed
559 560 561 562 563 564 565 566 567 568 569
        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;
570 571 572 573 574
        }
    }

    mmc_close(mmc);

npzacs's avatar
npzacs committed
575
    return error_code;
576
}
cRTrn13's avatar
openssl  
cRTrn13 committed
577

npzacs's avatar
npzacs committed
578
static int _read_vid(AACS *aacs, cert_list *hcl)
579
{
npzacs's avatar
npzacs committed
580 581 582
    /* Use VID given in config file if available */
    if (memcmp(aacs->vid, empty_key, 16)) {
        return AACS_SUCCESS;
583 584
    }

npzacs's avatar
npzacs committed
585 586
    int error_code = _mmc_read_auth(aacs, hcl, MMC_READ_VID, aacs->vid, NULL);
    if (error_code != AACS_SUCCESS) {
npzacs's avatar
npzacs committed
587
        BD_DEBUG(DBG_AACS, "Error reading VID!\n");
npzacs's avatar
npzacs committed
588 589 590
    } else {
        /* cache vid */
        keycache_save("vid", aacs->disc_id, aacs->vid, 16);
591 592 593 594
    }
    return error_code;
}

npzacs's avatar
npzacs committed
595
static int _read_read_data_key(AACS *aacs, cert_list *hcl)
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
596
{
npzacs's avatar
npzacs committed
597 598
    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
599
        BD_DEBUG(DBG_AACS, "Error reading data keys!\n");
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
600
    }
npzacs's avatar
npzacs committed
601 602
    return error_code;
}
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
603

npzacs's avatar
npzacs committed
604 605 606 607
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
608
        BD_DEBUG(DBG_AACS, "Error reading PMSN!\n");
Janusz Dziemidowicz's avatar
Janusz Dziemidowicz committed
609 610 611 612
    }
    return error_code;
}

613
static int _calc_vuk(AACS *aacs, uint8_t *mk, uint8_t *vuk, config_file *cf)
614
{
npzacs's avatar
npzacs committed
615 616
    int error_code;

617
    /* Skip if retrieved from config file */
618
    if (memcmp(vuk, empty_key, 16)) {
npzacs's avatar
npzacs committed
619
        BD_DEBUG(DBG_AACS, "Using VUK from config file\n");
npzacs's avatar
npzacs committed
620 621
        return AACS_SUCCESS;
    }
622

npzacs's avatar
npzacs committed
623
    /* get cached vuk */
624
    if (keycache_find("vuk", aacs->disc_id, vuk, 16)) {
npzacs's avatar
npzacs committed
625
        BD_DEBUG(DBG_AACS, "Using cached VUK\n");
npzacs's avatar
npzacs committed
626
        return AACS_SUCCESS;
npzacs's avatar
npzacs committed
627 628
    }

629 630 631 632
    if (!cf) {
        return AACS_ERROR_NO_CONFIG;
    }

633
    /* make sure we have media key */
634
    error_code = _calc_mk(aacs, mk, cf->pkl, cf->dkl);
npzacs's avatar
npzacs committed
635 636
    if (error_code != AACS_SUCCESS) {
        return error_code;
637 638
    }

npzacs's avatar
npzacs committed
639
    /* acquire VID */
640
    error_code = _read_vid(aacs, cf->host_cert_list);
npzacs's avatar
npzacs committed
641 642 643
    if (error_code != AACS_SUCCESS) {
        return error_code;
    }
644

npzacs's avatar
npzacs committed
645
    /* calculate VUK */
646

npzacs's avatar
npzacs committed
647
    crypto_aes128d(mk, aacs->vid, vuk);
648

npzacs's avatar
npzacs committed
649
    int a;
npzacs's avatar
npzacs committed
650
    for (a = 0; a < 16; a++) {
651
        vuk[a] ^= aacs->vid[a];
npzacs's avatar
npzacs committed
652
    }
653

npzacs's avatar
npzacs committed
654
    char str[40];
npzacs's avatar
npzacs committed
655
    BD_DEBUG(DBG_AACS, "Volume unique key: %s\n", str_print_hex(str, vuk, 16));
656

npzacs's avatar
npzacs committed
657
    /* cache vuk */
658
    keycache_save("vuk", aacs->disc_id, vuk, 16);
npzacs's avatar
npzacs committed
659

npzacs's avatar
npzacs committed
660
    return AACS_SUCCESS;
cRTrn13's avatar
openssl  
cRTrn13 committed
661 662
}

663 664
static uint16_t _read_u16(AACS_FILE_H *fp)
{
npzacs's avatar
npzacs committed
665
  uint8_t data[2] = {0, 0};
666 667 668 669 670 671 672 673 674 675 676

  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
677
    BD_DEBUG(DBG_AACS, "Assigning CPS units to titles ...\n");
678 679 680 681 682 683 684 685 686

    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
687 688
    BD_DEBUG(DBG_AACS, "Title FP : CPS unit %d\n", first_play);
    BD_DEBUG(DBG_AACS, "Title TM : CPS unit %d\n", top_menu);
689 690 691 692 693 694 695 696 697

    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
698
        BD_DEBUG(DBG_AACS, "Title %02d : CPS unit %d\n", i - 1, aacs->cps_units[i]);
699 700 701 702 703 704 705
    }

    /* 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
706
            BD_DEBUG(DBG_AACS, " *** Invalid CPS unit for title %d: %d !\n", (int) i - 1, aacs->cps_units[i]);
707 708 709 710 711
            aacs->cps_units[i] = 0;
        }
    }
}

npzacs's avatar
npzacs committed
712
/* Function that collects keys from keydb config entry */
713 714
static void _find_config_entry(AACS *aacs, title_entry_list *ce,
                               uint8_t *mk, uint8_t *vuk)
npzacs's avatar
npzacs committed
715 716
{
    char str[48];
717
    char str2[48];
npzacs's avatar
npzacs committed
718 719 720 721 722

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

        while (ce && ce->entry.discid) {
npzacs's avatar
npzacs committed
723
            if (!memcmp(aacs->disc_id, ce->entry.discid, 20)) {
npzacs's avatar
npzacs committed
724
                BD_DEBUG(DBG_AACS, "Found config entry for discid %s\n",
npzacs's avatar
npzacs committed
725
                      str_print_hex(str, ce->entry.discid, 20));
npzacs's avatar
npzacs committed
726 727 728 729 730 731 732 733 734 735
                break;
            }

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

        if (ce->entry.mek) {
736
            hexstring_to_hex_array(mk, 16, ce->entry.mek);
npzacs's avatar
npzacs committed
737

npzacs's avatar
npzacs committed
738
            BD_DEBUG(DBG_AACS, "Found media key for %s: %s\n",
739
                  str_print_hex(str2, ce->entry.discid, 20), str_print_hex(str, mk, 16));
npzacs's avatar
npzacs committed
740 741 742 743 744 745
        }

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

npzacs's avatar
npzacs committed
746
            BD_DEBUG(DBG_AACS, "Found volume id for %s: %s\n",
747
                  str_print_hex(str2, ce->entry.discid, 20), str_print_hex(str, aacs->vid, 16));
npzacs's avatar
npzacs committed
748 749 750
        }

        if (ce->entry.vuk) {
751
            hexstring_to_hex_array(vuk, 16, ce->entry.vuk);
npzacs's avatar
npzacs committed
752

npzacs's avatar
npzacs committed
753
            BD_DEBUG(DBG_AACS, "Found volume unique key for %s: %s\n",
754
                  str_print_hex(str2, ce->entry.discid, 20), str_print_hex(str, vuk, 16));
npzacs's avatar
npzacs committed
755 756 757
        }

        if (ce->entry.uk) {
npzacs's avatar
npzacs committed
758
            BD_DEBUG(DBG_AACS, "Acquire CPS unit keys from keydb config file...\n");
npzacs's avatar
npzacs committed
759 760 761 762 763 764 765 766 767

            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
768
                BD_DEBUG(DBG_AACS, "Unit key %d from keydb entry: %s\n",
npzacs's avatar
npzacs committed
769
                      aacs->num_uks,
npzacs's avatar
npzacs committed
770
                      str_print_hex(str, aacs->uks + (16 * (aacs->num_uks - 1)), 16));
npzacs's avatar
npzacs committed
771 772 773 774 775 776

                ukcursor = ukcursor->next;
            }
        }
}

npzacs's avatar
npzacs committed
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828
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;
}

829
static int _calc_uks(AACS *aacs, config_file *cf)
cRTrn13's avatar
openssl  
cRTrn13 committed
830
{
831
    AACS_FILE_H *fp = NULL;
832
    uint8_t  buf[16];
833
    uint64_t f_pos;
834
    unsigned int i;
npzacs's avatar
npzacs committed
835
    int error_code;
cRTrn13's avatar
openssl  
cRTrn13 committed
836

837 838
    uint8_t mk[16] = {0}, vuk[16] = {0};

839
    if (cf) {
npzacs's avatar
npzacs committed
840
        BD_DEBUG(DBG_AACS, "Searching for keydb config entry...\n");
841
        _find_config_entry(aacs, cf->list, mk, vuk);
842

843 844 845 846
        /* Skip if retrieved from config file */
        if (aacs->uks) {
            return AACS_SUCCESS;
        }
847
    }
848

849
    /* Make sure we have VUK */
850
    error_code = _calc_vuk(aacs, mk, vuk, cf);
npzacs's avatar
npzacs committed
851 852
    if (error_code != AACS_SUCCESS) {
        return error_code;
853
    }
854

npzacs's avatar
npzacs committed
855
    BD_DEBUG(DBG_AACS, "Calculate CPS unit keys...\n");
856

npzacs's avatar
npzacs committed
857
    fp = _file_open(aacs, "AACS" DIR_SEP "Unit_Key_RO.inf");
npzacs's avatar
npzacs committed
858
    if (!fp) {
npzacs's avatar
npzacs committed
859
        BD_DEBUG(DBG_AACS | DBG_CRIT, "Error opening unit key file (AACS/Unit_Key_RO.inf)\n");
npzacs's avatar
npzacs committed
860 861
        return AACS_ERROR_CORRUPTED_DISC;
    }
cRTrn13's avatar
openssl  
cRTrn13 committed
862

npzacs's avatar
npzacs committed
863 864
    if ((file_read(fp, buf, 4)) == 4) {
        f_pos = MKINT_BE32(buf);
npzacs's avatar
npzacs committed
865

npzacs's avatar
npzacs committed
866 867 868 869
        // 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
870

npzacs's avatar
npzacs committed
871 872
            X_FREE(aacs->uks);
            aacs->uks = calloc(aacs->num_uks, 16);
npzacs's avatar
npzacs committed
873

npzacs's avatar
npzacs committed
874
            BD_DEBUG(DBG_AACS, "%d CPS unit keys\n", aacs->num_uks);
npzacs's avatar
npzacs committed
875

npzacs's avatar
npzacs committed
876 877
        } else {
            aacs->num_uks = 0;
npzacs's avatar
npzacs committed
878
            BD_DEBUG(DBG_AACS | DBG_CRIT, "Error reading number of unit keys\n");
npzacs's avatar
npzacs committed
879 880
            error_code = AACS_ERROR_CORRUPTED_DISC;
        }
cRTrn13's avatar
openssl  
cRTrn13 committed
881

npzacs's avatar
npzacs committed
882 883 884
        // Read keys
        for (i = 0; i < aacs->num_uks; i++) {
            f_pos += 48;
cRTrn13's avatar
openssl  
cRTrn13 committed
885

npzacs's avatar
npzacs committed
886 887
            file_seek(fp, f_pos, SEEK_SET);
            if ((file_read(fp, buf, 16)) != 16) {
888
                BD_DEBUG(DBG_AACS | DBG_CRIT, "Unit key %d: read error\n", i);
npzacs's avatar
npzacs committed
889 890 891
                aacs->num_uks = i;
                error_code = AACS_ERROR_CORRUPTED_DISC;
                break;
npzacs's avatar
npzacs committed
892
            }
cRTrn13's avatar
openssl  
cRTrn13 committed
893

npzacs's avatar
npzacs committed
894
            crypto_aes128d(vuk, buf, aacs->uks + 16*i);
cRTrn13's avatar
openssl  
cRTrn13 committed
895

npzacs's avatar
npzacs committed
896
            char str[40];
npzacs's avatar
npzacs committed
897
            BD_DEBUG(DBG_AACS, "Unit key %d: %s\n", i,
npzacs's avatar
npzacs committed
898
                  str_print_hex(str, aacs->uks + 16*i, 16));
899 900
        }

npzacs's avatar
npzacs committed
901 902 903
        /* failing next is not fatal, it just slows down things */
        _read_uks_map(aacs, fp);

904
        file_close(fp);
cRTrn13's avatar
openssl  
cRTrn13 committed
905

npzacs's avatar
npzacs committed
906 907 908 909 910
        return error_code;
    }

    file_close(fp);

npzacs's avatar
npzacs committed
911
    BD_DEBUG(DBG_AACS | DBG_CRIT, "Error reading unit keys\n");
npzacs's avatar
npzacs committed
912
    return AACS_ERROR_CORRUPTED_DISC;
cRTrn13's avatar
openssl  
cRTrn13 committed
913 914
}