log_dbg("Flags: %d", (int)hdr->d.flags);
log_dbg("MK: offset %d, size %d", (int)hdr->d.mk_offset, (int)hdr->d.mk_size);
log_dbg("KDF: PBKDF2, hash %s", params->hash_name);
- log_dbg("Cipher: %s%s%s%s%s-%s",
- params->cipher[0],
- params->cipher[1] ? "-" : "", params->cipher[1] ?: "",
- params->cipher[2] ? "-" : "", params->cipher[2] ?: "",
- params->mode);
+ log_dbg("Cipher: %s-%s", params->cipher, params->mode);
}
static int hdr_from_disk(struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params,
int kdf_index, int cipher_index)
{
+ char cipher_name[MAX_CIPHER_LEN * 4];
uint32_t crc32;
size_t size;
params->hash_name = tcrypt_kdf[kdf_index].hash;
- params->cipher[0] = tcrypt_cipher[cipher_index].cipher[0].name;
- params->cipher[1] = tcrypt_cipher[cipher_index].cipher[1].name;
- params->cipher[2] = tcrypt_cipher[cipher_index].cipher[2].name;
- params->mode = tcrypt_cipher[cipher_index].mode;
- params->key_size = tcrypt_cipher[cipher_index].cipher[0].key_size; //fixme
+ params->key_size = tcrypt_cipher[cipher_index].cipher[0].key_size;
+ strncpy(cipher_name, tcrypt_cipher[cipher_index].cipher[0].name,
+ sizeof(cipher_name));
+
+ if (tcrypt_cipher[cipher_index].cipher[1].name) {
+ strcat(cipher_name, "-");
+ strncat(cipher_name, tcrypt_cipher[cipher_index].cipher[1].name,
+ MAX_CIPHER_LEN);
+ params->key_size += tcrypt_cipher[cipher_index].cipher[1].key_size;
+ }
+
+ if (tcrypt_cipher[cipher_index].cipher[2].name) {
+ strcat(cipher_name, "-");
+ strncat(cipher_name, tcrypt_cipher[cipher_index].cipher[2].name,
+ MAX_CIPHER_LEN);
+ params->key_size += tcrypt_cipher[cipher_index].cipher[2].key_size;
+ }
+
+ params->cipher = strdup(cipher_name);
+ params->mode = strdup(tcrypt_cipher[cipher_index].mode);
return 0;
}
{
char cipher[MAX_CIPHER_LEN], dm_name[PATH_MAX], dm_dev_name[PATH_MAX];
struct device *device = NULL;
- int i, r;
- struct tcrypt_alg tcipher[3] = {
- { params->cipher[0], params->key_size, 0 },
- { params->cipher[1], params->key_size, 0 },
- { params->cipher[2], params->key_size, 0 }
- };
+ int i, r, num_ciphers;
+ char cname[3][MAX_CIPHER_LEN];
struct crypt_dm_active_device dmd = {
.target = DM_CRYPT,
.size = 0,
}
};
+ if (!hdr->d.version) {
+ log_dbg("TCRYPT: this function is not supported without encrypted header load.");
+ return -ENOTSUP;
+ }
+
+ if (hdr->d.sector_size && hdr->d.sector_size != SECTOR_SIZE) {
+ log_err(cd, _("Activation is not supported for %d sector size.\n"),
+ hdr->d.sector_size);
+ return -ENOTSUP;
+ }
+
if (strstr(params->mode, "-tcrypt")) {
log_err(cd, _("Kernel doesn't support activation for this TCRYPT legacy mode.\n"));
return -ENOTSUP;
if (r)
return r;
- dmd.u.crypt.vk = crypt_alloc_volume_key(params->key_size, NULL);
+ /* Parse cipher chain from c1[-c2[-c3]] */
+ cname[0][0] = cname[1][0] = cname[2][0] = '\0';
+ num_ciphers = sscanf(params->cipher, "%" MAX_CIPHER_LEN_STR "[^-]-%"
+ MAX_CIPHER_LEN_STR "[^-]-%"
+ MAX_CIPHER_LEN_STR "s",
+ cname[0], cname[1], cname[2]);
+ if (num_ciphers < 1)
+ return -EINVAL;
+
+ /* Frome here, key size for every cipher must be the same */
+ dmd.u.crypt.vk = crypt_alloc_volume_key(params->key_size / num_ciphers, NULL);
if (!dmd.u.crypt.vk)
return -ENOMEM;
for (i = 2; i >= 0; i--) {
- if (!params->cipher[i])
+ if (!cname[i][0])
continue;
if (i == 0) {
}
snprintf(cipher, sizeof(cipher), "%s-%s",
- params->cipher[i], params->mode);
- copy_key(dmd.u.crypt.vk->key, hdr->d.keys,
- top_cipher(tcipher),
- params->key_size, i, params->mode);
+ cname[i], params->mode);
+ copy_key(dmd.u.crypt.vk->key, hdr->d.keys, num_ciphers - 1,
+ params->key_size / num_ciphers, i, params->mode);
- if (top_cipher(tcipher) != i) {
+ if ((num_ciphers -1) != i) {
snprintf(dm_dev_name, sizeof(dm_dev_name), "%s/%s_%d",
dm_get_dir(), name, i + 1);
r = device_alloc(&device, dm_dev_name);
free(CONST_CAST(void*)dmd.uuid);
return (r == -ENODEV) ? 0 : r;
}
+
+static int status_one(struct crypt_device *cd, const char *name,
+ const char *base_uuid, int index,
+ size_t *key_size, char *cipher, uint64_t *data_offset,
+ struct device **device)
+{
+ struct crypt_dm_active_device dmd = {};
+ char dm_name[PATH_MAX], *c;
+ int r;
+
+ if (snprintf(dm_name, sizeof(dm_name), "%s_%d", name, index) < 0)
+ return -ENOMEM;
+
+ r = dm_status_device(cd, dm_name);
+ if (r < 0)
+ return r;
+
+ r = dm_query_device(cd, dm_name, DM_ACTIVE_DEVICE |
+ DM_ACTIVE_UUID |
+ DM_ACTIVE_CRYPT_CIPHER |
+ DM_ACTIVE_CRYPT_KEYSIZE, &dmd);
+ if (r > 0)
+ r = 0;
+ if (!r && !strncmp(dmd.uuid, base_uuid, strlen(base_uuid))) {
+ if ((c = strchr(dmd.u.crypt.cipher, '-')))
+ *c = '\0';
+ strcat(cipher, "-");
+ strncat(cipher, dmd.u.crypt.cipher, MAX_CIPHER_LEN);
+ *key_size += dmd.u.crypt.vk->keylength;
+ *data_offset = dmd.u.crypt.offset * SECTOR_SIZE;
+ device_free(*device);
+ *device = dmd.data_device;
+ } else {
+ device_free(dmd.data_device);
+ r = -ENODEV;
+ }
+
+ free(CONST_CAST(void*)dmd.uuid);
+ free(CONST_CAST(void*)dmd.u.crypt.cipher);
+ crypt_free_volume_key(dmd.u.crypt.vk);
+ return r;
+}
+
+int TCRYPT_init_by_name(struct crypt_device *cd, const char *name,
+ const struct crypt_dm_active_device *dmd,
+ struct device **device,
+ struct crypt_params_tcrypt *tcrypt_params,
+ struct tcrypt_phdr *tcrypt_hdr)
+{
+ char cipher[MAX_CIPHER_LEN * 4], *mode;
+
+ memset(tcrypt_params, 0, sizeof(*tcrypt_params));
+ memset(tcrypt_hdr, 0, sizeof(*tcrypt_hdr));
+ tcrypt_hdr->d.sector_size = SECTOR_SIZE;
+ tcrypt_hdr->d.mk_offset = dmd->u.crypt.offset * SECTOR_SIZE;
+
+ strncpy(cipher, dmd->u.crypt.cipher, MAX_CIPHER_LEN);
+
+ if ((mode = strchr(cipher, '-'))) {
+ *mode = '\0';
+ tcrypt_params->mode = strdup(++mode);
+ }
+ tcrypt_params->key_size = dmd->u.crypt.vk->keylength;
+
+ if (!status_one(cd, name, dmd->uuid, 1, &tcrypt_params->key_size,
+ cipher, &tcrypt_hdr->d.mk_offset, device))
+ status_one(cd, name, dmd->uuid, 2, &tcrypt_params->key_size,
+ cipher, &tcrypt_hdr->d.mk_offset, device);
+
+ tcrypt_params->cipher = strdup(cipher);
+ return 0;
+}
+
+uint64_t TCRYPT_get_data_offset(struct tcrypt_phdr *hdr)
+{
+ // FIXME: system vol.
+ if (!hdr->d.mk_offset)
+ return 1;
+ return (hdr->d.mk_offset / hdr->d.sector_size);
+}
+
+uint64_t TCRYPT_get_iv_offset(struct tcrypt_phdr *hdr)
+{
+ if (!hdr->d.mk_offset)
+ return 0;
+ return (hdr->d.mk_offset / hdr->d.sector_size);
+}
+
+int TCRYPT_get_volume_key(struct crypt_device *cd,
+ struct tcrypt_phdr *hdr,
+ struct crypt_params_tcrypt *params,
+ struct volume_key **vk)
+{
+ int i, num_keys = 1, key_size;
+ const char *c;
+
+ if (!hdr->d.version) {
+ log_dbg("TCRYPT: this function is not supported without encrypted header load.");
+ return -ENOTSUP;
+ }
+
+ *vk = crypt_alloc_volume_key(params->key_size, NULL);
+ if (!*vk)
+ return -ENOMEM;
+
+ for (num_keys = 0, c = params->cipher; c ; num_keys++)
+ c = strchr(++c, '-');
+
+ key_size = params->key_size / num_keys;
+
+ for (i = 0; i < num_keys; i++)
+ copy_key(&(*vk)->key[key_size * i], hdr->d.keys, num_keys - 1,
+ key_size, i, params->mode);
+
+ return 0;
+}
+
+int TCRYPT_dump(struct crypt_device *cd,
+ struct tcrypt_phdr *hdr,
+ struct crypt_params_tcrypt *params)
+{
+ log_std(cd, "TCRYPT header information for %s\n",
+ device_path(crypt_metadata_device(cd)));
+ if (hdr->d.version) {
+ log_std(cd, "Version: \t%d\n", hdr->d.version);
+ log_std(cd, "Driver req.:\t%d\n", hdr->d.version_tc);
+
+ log_std(cd, "Sector size:\t%" PRIu32 "\n", hdr->d.sector_size);
+ log_std(cd, "MK offset:\t%" PRIu64 "\n", hdr->d.mk_offset);
+ log_std(cd, "PBKDF2 hash:\t%s\n", params->hash_name);
+ }
+ log_std(cd, "Cipher chain:\t%s\n", params->cipher);
+ log_std(cd, "Cipher mode:\t%s\n", params->mode);
+ log_std(cd, "MK bits: \t%d\n", params->key_size * 8);
+ return 0;
+}
projects / platform / upstream / cryptsetup.git / blobdiff