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blob.c
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blob.c
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/*
* encrypted vault parsing
*
* Copyright (C) 2014-2018 LastPass.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
*
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*
* See LICENSE.OpenSSL for more details regarding this exception.
*/
#include "blob.h"
#include "config.h"
#include "endpoints.h"
#include "cipher.h"
#include "util.h"
#include "upload-queue.h"
#include "version.h"
#include <time.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#if defined(__APPLE__) && defined(__MACH__)
#include <libkern/OSByteOrder.h>
#define htobe32(x) OSSwapHostToBigInt32(x)
#define be32toh(x) OSSwapBigToHostInt32(x)
#else
# if (defined(__unix__) || defined(unix)) && !defined(USG)
# include <sys/param.h>
# endif
# if defined(BSD)
# include <sys/endian.h>
# else
# include <endian.h>
# endif
#endif
struct app *account_to_app(const struct account *account)
{
return container_of(account, struct app, account);
}
void share_free(struct share *share)
{
if (!share)
return;
free(share->name);
free(share->id);
free(share->chunk);
free(share);
}
void field_free(struct field *field)
{
if (!field)
return;
free(field->name);
free(field->value);
free(field->value_encrypted);
free(field->type);
free(field);
}
void account_free_contents(struct account *account)
{
struct field *field, *tmp;
free(account->id);
free(account->name);
free(account->group);
free(account->fullname);
free(account->url);
free(account->username);
free(account->password);
free(account->note);
free(account->name_encrypted);
free(account->group_encrypted);
free(account->username_encrypted);
free(account->password_encrypted);
free(account->note_encrypted);
free(account->attachkey);
free(account->attachkey_encrypted);
list_for_each_entry_safe(field, tmp, &account->field_head, list) {
field_free(field);
}
}
void app_free(struct app *app)
{
account_free_contents(&app->account);
free(app->appname);
free(app->extra);
free(app->extra_encrypted);
free(app->wintitle);
free(app->wininfo);
free(app->exeversion);
free(app->warnversion);
free(app->exehash);
}
bool account_is_group(struct account *account)
{
return !strcmp(account->url, "http://group");
}
static
bool account_is_secure_note(const struct account *account)
{
return !strcmp(account->url, "http://sn");
}
struct app *new_app()
{
struct app *app = new0(struct app, 1);
struct account *account = &app->account;
app->appname = xstrdup("");
app->extra = xstrdup("");
app->extra_encrypted = xstrdup("");
INIT_LIST_HEAD(&account->field_head);
INIT_LIST_HEAD(&account->attach_head);
account->is_app = true;
return app;
}
struct account *new_account()
{
struct account *account = new0(struct account, 1);
INIT_LIST_HEAD(&account->field_head);
INIT_LIST_HEAD(&account->attach_head);
return account;
}
void account_free(struct account *account)
{
if (!account)
return;
if (account->is_app) {
app_free(account_to_app(account));
return;
}
account_free_contents(account);
free(account);
}
void blob_free(struct blob *blob)
{
if (!blob)
return;
struct account *account, *tmp;
struct share *share, *tmp_share;
list_for_each_entry_safe(account, tmp, &blob->account_head, list)
account_free(account);
list_for_each_entry_safe(share, tmp_share, &blob->share_head, list)
share_free(share);
free(blob);
}
struct blob_pos {
const unsigned char *data;
size_t len;
};
struct chunk {
char name[4 + 1];
const unsigned char *data;
size_t len;
};
struct item {
const unsigned char *data;
size_t len;
};
static bool read_chunk(struct blob_pos *blob, struct chunk *chunk)
{
if (blob->len < 4)
return false;
chunk->name[0] = blob->data[0];
chunk->name[1] = blob->data[1];
chunk->name[2] = blob->data[2];
chunk->name[3] = blob->data[3];
chunk->name[4] = '\0';
blob->len -= 4;
blob->data += 4;
if (blob->len < sizeof(uint32_t))
return false;
chunk->len = be32toh(*((uint32_t *)blob->data));
blob->len -= sizeof(uint32_t);
blob->data += sizeof(uint32_t);
if (chunk->len > blob->len)
return false;
chunk->data = blob->data;
blob->data += chunk->len;
blob->len -= chunk->len;
return true;
}
static bool read_item(struct chunk *chunk, struct item *item)
{
if (chunk->len < sizeof(uint32_t))
return false;
item->len = be32toh(*((uint32_t *)chunk->data));
chunk->len -= sizeof(uint32_t);
chunk->data += sizeof(uint32_t);
if (item->len > chunk->len)
return false;
item->data = chunk->data;
chunk->data += item->len;
chunk->len -= item->len;
return true;
}
static char *read_hex_string(struct chunk *chunk)
{
struct item item;
int result;
char *str = NULL;
if (!read_item(chunk, &item))
return NULL;
if (item.len == 0)
return xstrdup("");
result = hex_to_bytes((char *) item.data, (unsigned char **) &str);
if (result) {
free(str);
return NULL;
}
return str;
}
static char *read_plain_string(struct chunk *chunk)
{
struct item item;
if (!read_item(chunk, &item))
return NULL;
if (item.len == 0)
return xstrdup("");
return xstrndup((char *) item.data, item.len);
}
static char *read_crypt_string(struct chunk *chunk, const unsigned char key[KDF_HASH_LEN], char **stored_base64)
{
struct item item;
char *ptext;
if (!read_item(chunk, &item))
return NULL;
if (stored_base64)
*stored_base64 = cipher_base64(item.data, item.len);
if (item.len == 0)
return xstrdup("");
ptext = cipher_aes_decrypt(item.data, item.len, key);
if (!ptext)
/* don't fail whole blob if this item cannot be decrypted */
return xstrdup("");
return ptext;
}
static int read_boolean(struct chunk *chunk)
{
struct item item;
if (!read_item(chunk, &item))
return -1;
if (item.len != 1)
return 0;
return item.data[0] == '1';
}
#define entry_plain_at(base, var) do { \
char *__entry_val__ = read_plain_string(chunk); \
if (!__entry_val__) \
goto error; \
base->var = __entry_val__; \
} while (0)
#define entry_plain(var) entry_plain_at(parsed, var)
#define entry_hex_at(base, var) do { \
char *__entry_val__ = read_hex_string(chunk); \
if (!__entry_val__) \
goto error; \
base->var = __entry_val__; \
} while (0)
#define entry_hex(var) entry_hex_at(parsed, var)
#define entry_boolean(var) do { \
int __entry_val__ = read_boolean(chunk); \
if (__entry_val__ < 0) \
goto error; \
parsed->var = __entry_val__; \
} while (0)
#define entry_crypt_at(base, var) do { \
char *__entry_val__ = read_crypt_string(chunk, key, &base->var##_encrypted); \
if (!__entry_val__) \
goto error; \
base->var = __entry_val__; \
} while (0)
#define entry_crypt(var) entry_crypt_at(parsed, var)
#define skip(placeholder) do { \
struct item skip_item; \
if (!read_item(chunk, &skip_item)) \
goto error; \
} while (0)
static struct account *account_parse(struct chunk *chunk, const unsigned char key[KDF_HASH_LEN])
{
struct account *parsed = new_account();
entry_plain(id);
entry_crypt(name);
entry_crypt(group);
entry_hex(url);
entry_crypt(note);
entry_boolean(fav);
skip(sharedfromaid);
entry_crypt(username);
entry_crypt(password);
entry_boolean(pwprotect);
skip(genpw);
skip(sn);
entry_plain(last_touch);
skip(autologin);
skip(never_autofill);
skip(realm_data);
skip(fiid);
skip(custom_js);
skip(submit_id);
skip(captcha_id);
skip(urid);
skip(basic_auth);
skip(method);
skip(action);
skip(groupid);
skip(deleted);
entry_plain(attachkey_encrypted);
entry_boolean(attachpresent);
skip(individualshare);
skip(notetype);
skip(noalert);
entry_plain(last_modified_gmt);
skip(hasbeenshared);
skip(last_pwchange_gmt);
skip(created_gmt);
skip(vulnerable);
if (parsed->name[0] == 16)
parsed->name[0] = '\0';
if (parsed->group[0] == 16)
parsed->group[0] = '\0';
if (strlen(parsed->attachkey_encrypted)) {
parsed->attachkey = cipher_aes_decrypt_base64(
parsed->attachkey_encrypted, key);
}
if (!parsed->attachkey)
parsed->attachkey = xstrdup("");
/* use name as 'fullname' only if there's no assigned group */
if (strlen(parsed->group) &&
(strlen(parsed->name) || account_is_group(parsed)))
xasprintf(&parsed->fullname, "%s/%s", parsed->group, parsed->name);
else
parsed->fullname = xstrdup(parsed->name);
return parsed;
error:
account_free(parsed);
return NULL;
}
static struct field *field_parse(struct chunk *chunk, const unsigned char key[KDF_HASH_LEN])
{
struct field *parsed = new0(struct field, 1);
entry_plain(name);
entry_plain(type);
if (!strcmp(parsed->type, "email") || !strcmp(parsed->type, "tel") || !strcmp(parsed->type, "text") || !strcmp(parsed->type, "password") || !strcmp(parsed->type, "textarea"))
entry_crypt(value);
else
entry_plain(value);
entry_boolean(checked);
return parsed;
error:
field_free(parsed);
return NULL;
}
static struct field *app_field_parse(struct chunk *chunk, const unsigned char key[KDF_HASH_LEN])
{
struct field *parsed = new0(struct field, 1);
entry_plain(name);
entry_crypt(value);
entry_plain(type);
return parsed;
error:
field_free(parsed);
return NULL;
}
static struct share *share_parse(struct chunk *chunk, const struct private_key *private_key)
{
struct share *parsed = new0(struct share, 1);
struct item item;
_cleanup_free_ unsigned char *ciphertext = NULL;
_cleanup_free_ char *hex_key = NULL;
_cleanup_free_ unsigned char *key = NULL;
_cleanup_free_ char *base64_name = NULL;
size_t len;
if (!private_key)
goto error;
if (chunk->len) {
parsed->chunk_len = chunk->len;
parsed->chunk = xmalloc(chunk->len);
memcpy(parsed->chunk, chunk->data, chunk->len);
}
entry_plain(id);
if (!read_item(chunk, &item) || item.len == 0 || item.len % 2 != 0)
goto error;
hex_to_bytes((char *) item.data, &ciphertext);
hex_key = cipher_rsa_decrypt(ciphertext, item.len / 2, private_key);
if (!hex_key)
goto error;
len = strlen(hex_key);
if (len % 2 != 0)
goto error;
len /= 2;
if (len != KDF_HASH_LEN)
goto error;
hex_to_bytes(hex_key, &key);
mlock(parsed->key, KDF_HASH_LEN);
memcpy(parsed->key, key, KDF_HASH_LEN);
base64_name = read_plain_string(chunk);
parsed->name = cipher_aes_decrypt_base64(base64_name, parsed->key);
if (!parsed->name)
goto error;
entry_boolean(readonly);
return parsed;
error:
share_free(parsed);
return NULL;
}
static struct app *app_parse(struct chunk *chunk, const unsigned char key[KDF_HASH_LEN])
{
struct app *app = new_app();
struct account *parsed = &app->account;
entry_plain(id);
entry_hex_at(app, appname);
entry_crypt_at(app, extra);
entry_crypt(name);
entry_crypt(group);
entry_plain(last_touch);
skip(fiid);
entry_boolean(pwprotect);
entry_boolean(fav);
entry_plain_at(app, wintitle);
entry_plain_at(app, wininfo);
entry_plain_at(app, exeversion);
skip(autologin);
entry_plain_at(app, warnversion);
entry_plain_at(app, exehash);
parsed->username = xstrdup("");
parsed->password = xstrdup("");
parsed->note = xstrdup("");
parsed->url = xstrdup("");
if (strlen(parsed->group) &&
(strlen(parsed->name) || account_is_group(parsed)))
xasprintf(&parsed->fullname, "%s/%s", parsed->group, parsed->name);
else
parsed->fullname = xstrdup(parsed->name);
return app;
error:
app_free(app);
return NULL;
}
static void attach_free(struct attach *attach)
{
if (!attach)
return;
free(attach->id);
free(attach->parent);
free(attach->mimetype);
free(attach->storagekey);
free(attach->size);
free(attach->filename);
free(attach);
}
static struct attach *attach_parse(struct chunk *chunk)
{
struct attach *parsed = new0(struct attach, 1);
entry_plain(id);
entry_plain(parent);
entry_plain(mimetype);
entry_plain(storagekey);
entry_plain(size);
entry_plain(filename);
return parsed;
error:
attach_free(parsed);
return NULL;
}
#undef entry_plain
#undef entry_plain_at
#undef entry_hex
#undef entry_boolean
#undef entry_crypt
#undef entry_crypt_at
#undef skip
struct blob *blob_parse(const unsigned char *blob, size_t len, const unsigned char key[KDF_HASH_LEN], const struct private_key *private_key)
{
struct blob_pos blob_pos = { .data = blob, .len = len };
struct chunk chunk;
struct account *account = NULL;
struct field *field;
struct share *share, *last_share = NULL;
struct app *app = NULL;
struct attach *attach;
struct blob *parsed;
_cleanup_free_ char *versionstr = NULL;
parsed = new0(struct blob, 1);
parsed->local_version = false;
INIT_LIST_HEAD(&parsed->account_head);
INIT_LIST_HEAD(&parsed->share_head);
while (read_chunk(&blob_pos, &chunk)) {
if (!strcmp(chunk.name, "LPAV")) {
versionstr = xstrndup((char *) chunk.data, chunk.len);
parsed->version = strtoull(versionstr, NULL, 10);
} else if (!strcmp(chunk.name, "ACCT")) {
account = account_parse(&chunk, last_share ? last_share->key : key);
if (!account)
goto error;
if (last_share) {
account->share = last_share;
char *tmp = account->fullname;
xasprintf(&account->fullname, "%s/%s",
last_share->name, tmp);
free(tmp);
}
list_add(&account->list, &parsed->account_head);
} else if (!strcmp(chunk.name, "ACFL") || !strcmp(chunk.name, "ACOF")) {
if (!account)
goto error;
field = field_parse(&chunk, last_share ? last_share->key : key);
if (!field)
goto error;
list_add_tail(&field->list, &account->field_head);
} else if (!strcmp(chunk.name, "LOCL")) {
parsed->local_version = true;
} else if (!strcmp(chunk.name, "SHAR")) {
share = share_parse(&chunk, private_key);
last_share = share;
if (share)
list_add_tail(&share->list, &parsed->share_head);
} else if (!strcmp(chunk.name, "AACT")) {
app = app_parse(&chunk, last_share ? last_share->key : key);
if (app)
list_add_tail(&app->account.list, &parsed->account_head);
} else if (!strcmp(chunk.name, "AACF")) {
if (!app)
goto error;
field = app_field_parse(&chunk, last_share ? last_share->key : key);
if (!field)
goto error;
list_add_tail(&field->list, &app->account.field_head);
} else if (!strcmp(chunk.name, "ATTA")) {
struct account *tmp;
bool found = false;
attach = attach_parse(&chunk);
if (!attach)
goto error;
/* add attachment to the proper account's list */
list_for_each_entry(tmp, &parsed->account_head, list) {
if (!strcmp(tmp->id, attach->parent)) {
found = true;
list_add_tail(&attach->list, &tmp->attach_head);
break;
}
}
if (!found)
attach_free(attach);
}
}
if (!versionstr)
goto error;
return parsed;
error:
blob_free(parsed);
return NULL;
}
void buffer_init(struct buffer *buf)
{
buf->len = 0;
buf->max = 80;
buf->bytes = xcalloc(buf->max, 1);
}
void buffer_append(struct buffer *buffer, void *bytes, size_t len)
{
if (buffer->len + len > buffer->max) {
buffer->max = buffer->len + len + 512;
buffer->bytes = xrealloc(buffer->bytes, buffer->max);
}
memcpy(buffer->bytes + buffer->len, bytes, len);
buffer->len += len;
}
void buffer_append_char(struct buffer *buf, char c)
{
if (buf->len + 1 >= buf->max) {
buf->max += 80;
buf->bytes = xrealloc(buf->bytes, buf->max);
}
buf->bytes[buf->len++] = c;
buf->bytes[buf->len] = '\0';
}
void buffer_append_str(struct buffer *buf, char *str)
{
/*
* copy null terminator, but don't count in used len
* so that append of multiple strings will work
*/
buffer_append(buf, str, strlen(str) + 1);
buf->len--;
}
static void write_item(struct buffer *buffer, char *bytes, size_t len)
{
uint32_t be32len = htobe32(len);
buffer_append(buffer, &be32len, sizeof(be32len));
buffer_append(buffer, bytes, len);
}
static void write_plain_string(struct buffer *buffer, char *bytes)
{
write_item(buffer, bytes, strlen(bytes));
}
static void write_hex_string(struct buffer *buffer, char *bytes)
{
_cleanup_free_ char *hex = NULL;
bytes_to_hex((unsigned char *) bytes, &hex, strlen(bytes));
write_plain_string(buffer, hex);
}
static void write_crypt_string(struct buffer *buffer, char *enc_str)
{
_cleanup_free_ unsigned char *encrypted = NULL;
size_t len;
/*
* enc_str is base64-encoded, but we write out raw bytes in
* the saved blob, so un-base64.
*/
len = cipher_unbase64(enc_str, &encrypted);
write_item(buffer, (char *) encrypted, len);
}
static void write_boolean(struct buffer *buffer, bool yes)
{
write_plain_string(buffer, yes ? "1" : "0");
}
static void write_chunk(struct buffer *dstbuffer, struct buffer *srcbuffer, char *tag)
{
if (strlen(tag) != 4)
return;
buffer_append(dstbuffer, tag, 4);
write_item(dstbuffer, srcbuffer->bytes, srcbuffer->len);
}
static void write_app_chunk(struct buffer *buffer, struct account *account)
{
struct buffer accbuf, fieldbuf;
struct field *field;
struct app *app = account_to_app(account);
memset(&accbuf, 0, sizeof(accbuf));
write_plain_string(&accbuf, account->id);
write_hex_string(&accbuf, app->appname);
write_crypt_string(&accbuf, app->extra_encrypted);
write_crypt_string(&accbuf, account->name_encrypted);
write_crypt_string(&accbuf, account->group_encrypted);
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_boolean(&accbuf, account->pwprotect);
write_boolean(&accbuf, account->fav);
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_chunk(buffer, &accbuf, "AACT");
free(accbuf.bytes);
list_for_each_entry(field, &account->field_head, list) {
memset(&fieldbuf, 0, sizeof(fieldbuf));
write_plain_string(&fieldbuf, field->name);
if (!strcmp(field->type, "email") || !strcmp(field->type, "tel") || !strcmp(field->type, "text") || !strcmp(field->type, "password") || !strcmp(field->type, "textarea"))
write_crypt_string(&fieldbuf, field->value_encrypted);
else
write_plain_string(&fieldbuf, field->value);
write_plain_string(&fieldbuf, field->type);
write_chunk(buffer, &fieldbuf, "AACF");
free(fieldbuf.bytes);
}
}
static void write_account_chunk(struct buffer *buffer, struct account *account)
{
struct buffer accbuf, fieldbuf;
struct field *field;
if (account->is_app) {
write_app_chunk(buffer, account);
return;
}
memset(&accbuf, 0, sizeof(accbuf));
write_plain_string(&accbuf, account->id);
write_crypt_string(&accbuf, account->name_encrypted);
write_crypt_string(&accbuf, account->group_encrypted);
write_hex_string(&accbuf, account->url);
write_crypt_string(&accbuf, account->note_encrypted);
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_crypt_string(&accbuf, account->username_encrypted);
write_crypt_string(&accbuf, account->password_encrypted);
write_boolean(&accbuf, account->pwprotect);
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_plain_string(&accbuf, "skipped");
write_chunk(buffer, &accbuf, "ACCT");
free(accbuf.bytes);
list_for_each_entry(field, &account->field_head, list) {
memset(&fieldbuf, 0, sizeof(fieldbuf));
write_plain_string(&fieldbuf, field->name);
write_plain_string(&fieldbuf, field->type);
if (!strcmp(field->type, "email") || !strcmp(field->type, "tel") || !strcmp(field->type, "text") || !strcmp(field->type, "password") || !strcmp(field->type, "textarea"))
write_crypt_string(&fieldbuf, field->value_encrypted);
else
write_plain_string(&fieldbuf, field->value);
write_boolean(&fieldbuf, field->checked);
write_chunk(buffer, &fieldbuf, "ACFL");
free(fieldbuf.bytes);
}
}
static void write_share_chunk(struct buffer *buffer, struct share *share)
{
struct buffer sharebuf = { .bytes = share->chunk, .len = share->chunk_len, .max = share->chunk_len };
write_chunk(buffer, &sharebuf, "SHAR");
}
size_t blob_write(const struct blob *blob, const unsigned char key[KDF_HASH_LEN], char **out)
{
struct buffer buffer;
struct share *last_share = NULL;
struct account *account;
UNUSED(key);
memset(&buffer, 0, sizeof(buffer));
_cleanup_free_ char *version = xultostr(blob->version);
buffer_append(&buffer, "LPAV", 4);
write_plain_string(&buffer, version);
buffer_append(&buffer, "LOCL", 4);
write_plain_string(&buffer, LASTPASS_CLI_VERSION);
list_for_each_entry(account, &blob->account_head, list) {
if (!account->share)
write_account_chunk(&buffer, account);
}
list_for_each_entry(account, &blob->account_head, list) {
if (!account->share)
continue;
if (last_share != account->share) {
write_share_chunk(&buffer, account->share);
last_share = account->share;
}
write_account_chunk(&buffer, account);
}
*out = buffer.bytes;
return buffer.len;
}
static struct blob *local_blob(const unsigned char key[KDF_HASH_LEN], const struct private_key *private_key)
{
_cleanup_free_ unsigned char *blob = NULL;
size_t len = config_read_encrypted_buffer("blob", &blob, key);
if (!blob)
return NULL;
return blob_parse(blob, len, key, private_key);
}
static struct blob *blob_get_latest(struct session *session, const unsigned char key[KDF_HASH_LEN])
{
struct blob *local;
unsigned long long remote_version;
local = local_blob(key, &session->private_key);
if (!local)
return lastpass_get_blob(session, key);
remote_version = lastpass_get_blob_version(session, key);
if (remote_version == 0) {
blob_free(local);
return NULL;
}
if (local->version < remote_version || (local->local_version && local->version == remote_version)) {
blob_free(local);
return lastpass_get_blob(session, key);
}
config_touch("blob");
return local;
}
static time_t auto_sync_time(void)
{
time_t time;
char *env = getenv("LPASS_AUTO_SYNC_TIME");
if (!env)
return 5;
time = strtoul(env, NULL, 10);
if (!time)
return 5;
return time;
}
struct blob *blob_load(enum blobsync sync, struct session *session, const unsigned char key[KDF_HASH_LEN])
{
if (sync == BLOB_SYNC_AUTO) {
if (!config_exists("blob"))
return blob_get_latest(session, key);
else if (time(NULL) - config_mtime("blob") <= auto_sync_time())
return local_blob(key, &session->private_key);
return blob_get_latest(session, key);
} else if (sync == BLOB_SYNC_YES)
return blob_get_latest(session, key);
else if (sync == BLOB_SYNC_NO)
return local_blob(key, &session->private_key);
return NULL;
}
void blob_save(const struct blob *blob, const unsigned char key[KDF_HASH_LEN])
{
_cleanup_free_ char *bluffer = NULL;
size_t len;
len = blob_write(blob, key, &bluffer);
if (!len)
die("Could not write blob.");
config_write_encrypted_buffer("blob", bluffer, len, key);
}
#define set_field(obj, field) do { \
free(obj->field); \
obj->field = field; \
} while (0)
#define set_encrypted_field(obj, field) do { \
if (!obj->field || !field || strcmp(obj->field, field)) { \
set_field(obj, field); \
free(obj->field##_encrypted); \
obj->field##_encrypted = encrypt_and_base64(field, account->share ? account->share->key : key); \
} \
} while (0)
#define reencrypt_field(obj, field) do { \
free(obj->field##_encrypted); \
obj->field##_encrypted = encrypt_and_base64(obj->field, account->share ? account->share->key : key); \
} while (0)
void account_set_username(struct account *account, char *username, unsigned const char key[KDF_HASH_LEN])
{
set_encrypted_field(account, username);
}
void account_set_password(struct account *account, char *password, unsigned const char key[KDF_HASH_LEN])
{
set_encrypted_field(account, password);
}
void account_set_group(struct account *account, char *group, unsigned const char key[KDF_HASH_LEN])
{
set_encrypted_field(account, group);
}
void account_set_name(struct account *account, char *name, unsigned const char key[KDF_HASH_LEN])
{
set_encrypted_field(account, name);
}
void account_set_note(struct account *account, char *note, unsigned const char key[KDF_HASH_LEN])
{
set_encrypted_field(account, note);