mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-22 06:27:51 +00:00
414 lines
15 KiB
C
414 lines
15 KiB
C
/*
|
|
Serval Distributed Numbering Architecture (DNA)
|
|
Copyright (C) 2010 Paul Gardner-Stephen
|
|
|
|
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.
|
|
*/
|
|
|
|
#include "serval.h"
|
|
#include "str.h"
|
|
#include "rhizome.h"
|
|
#include <stdlib.h>
|
|
|
|
int is_rhizome_enabled()
|
|
{
|
|
return confValueGetBoolean("rhizome.enable", 1);
|
|
}
|
|
|
|
int is_rhizome_http_enabled()
|
|
{
|
|
return confValueGetBoolean("rhizome.enable", 1)
|
|
&& confValueGetBoolean("rhizome.http.enable", 1)
|
|
&& rhizome_db;
|
|
}
|
|
|
|
int is_rhizome_mdp_enabled()
|
|
{
|
|
return confValueGetBoolean("rhizome.enable", 1)
|
|
&& confValueGetBoolean("rhizome.mdp.enable", 1)
|
|
&& rhizome_db;
|
|
}
|
|
|
|
int is_rhizome_mdp_server_running()
|
|
{
|
|
return is_rhizome_mdp_enabled();
|
|
}
|
|
|
|
int is_rhizome_advertise_enabled()
|
|
{
|
|
return confValueGetBoolean("rhizome.enable", 1)
|
|
&& confValueGetBoolean("rhizome.advertise.enable", 1)
|
|
&& rhizome_db
|
|
&& ( is_rhizome_http_server_running()
|
|
||is_rhizome_mdp_server_running());
|
|
}
|
|
|
|
int rhizome_fetch_delay_ms()
|
|
{
|
|
return confValueGetInt64Range("rhizome.fetch_delay_ms", 50, 1, 3600000);
|
|
}
|
|
|
|
/* Import a bundle from a pair of files, one containing the manifest and the optional other
|
|
containing the payload. The logic is all in rhizome_bundle_import(). This function just wraps
|
|
that function and manages file and object buffers and lifetimes.
|
|
*/
|
|
|
|
int rhizome_bundle_import_files(const char *manifest_path, const char *payload_path, int ttl)
|
|
{
|
|
if (debug & DEBUG_RHIZOME)
|
|
DEBUGF("(manifest_path=%s, payload_path=%s, ttl=%d)",
|
|
manifest_path ? alloca_str_toprint(manifest_path) : "NULL",
|
|
payload_path ? alloca_str_toprint(payload_path) : "NULL",
|
|
ttl
|
|
);
|
|
/* Read manifest file if no manifest was given */
|
|
if (!manifest_path)
|
|
return WHY("No manifest supplied");
|
|
int ret = 0;
|
|
rhizome_manifest *m = rhizome_new_manifest();
|
|
if (!m)
|
|
ret = WHY("Out of manifests");
|
|
else if (rhizome_read_manifest_file(m, manifest_path, 0 /* file not buffer */) == -1)
|
|
ret = WHY("Could not read manifest file");
|
|
else if (rhizome_manifest_verify(m))
|
|
ret = WHY("Verification of manifest file failed");
|
|
else {
|
|
/* Make sure we store signatures */
|
|
m->manifest_bytes=m->manifest_all_bytes;
|
|
|
|
m->dataFileName = strdup(payload_path);
|
|
if (rhizome_manifest_check_file(m))
|
|
ret = WHY("Payload does not belong to manifest");
|
|
else
|
|
ret = rhizome_bundle_import(m, ttl);
|
|
}
|
|
if (m)
|
|
rhizome_manifest_free(m);
|
|
return ret;
|
|
}
|
|
|
|
/* Import a bundle from a finalised manifest struct. The dataFileName element must give the path
|
|
of a readable file containing the payload unless the payload is null (zero length). The logic is
|
|
all in rhizome_add_manifest(). This function just wraps that function and manages object buffers
|
|
and lifetimes.
|
|
*/
|
|
|
|
int rhizome_bundle_import(rhizome_manifest *m, int ttl)
|
|
{
|
|
if (debug & DEBUG_RHIZOME)
|
|
DEBUGF("(m=%p, ttl=%d)", m, ttl);
|
|
/* Add the manifest and its payload to the Rhizome database. */
|
|
if (rhizome_manifest_check_file(m))
|
|
return WHY("File does not belong to manifest");
|
|
int ret = rhizome_manifest_check_duplicate(m, NULL);
|
|
if (ret == 0) {
|
|
ret = rhizome_add_manifest(m, ttl);
|
|
if (ret == -1)
|
|
WHY("rhizome_add_manifest() failed");
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int rhizome_manifest_check_sanity(rhizome_manifest *m_in)
|
|
{
|
|
/* Ensure manifest meets basic sanity checks. */
|
|
const char *service = rhizome_manifest_get(m_in, "service", NULL, 0);
|
|
const char *sender = rhizome_manifest_get(m_in, "sender", NULL, 0);
|
|
const char *recipient = rhizome_manifest_get(m_in, "recipient", NULL, 0);
|
|
|
|
if (service == NULL || !service[0])
|
|
return WHY("Manifest missing 'service' field");
|
|
if (rhizome_manifest_get_ll(m_in, "date") == -1)
|
|
return WHY("Manifest missing 'date' field");
|
|
if (strcasecmp(service, RHIZOME_SERVICE_FILE) == 0) {
|
|
const char *name = rhizome_manifest_get(m_in, "name", NULL, 0);
|
|
if (name == NULL)
|
|
return WHY("Manifest missing 'name' field");
|
|
} else if (strcasecmp(service, RHIZOME_SERVICE_MESHMS) == 0) {
|
|
if (sender == NULL || !sender[0])
|
|
return WHY("MeshMS Manifest missing 'sender' field");
|
|
if (!str_is_subscriber_id(sender))
|
|
return WHYF("MeshMS Manifest contains invalid 'sender' field: %s", sender);
|
|
if (recipient == NULL || !recipient[0])
|
|
return WHY("MeshMS Manifest missing 'recipient' field");
|
|
if (!str_is_subscriber_id(recipient))
|
|
return WHYF("MeshMS Manifest contains invalid 'recipient' field: %s", recipient);
|
|
} else {
|
|
return WHY("Invalid service type");
|
|
}
|
|
if (debug & DEBUG_RHIZOME)
|
|
DEBUGF("sender='%s'", sender ? sender : "(null)");
|
|
|
|
/* passes all sanity checks */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
A bundle can either be an ordinary manifest-payload pair, or a group description.
|
|
|
|
- Group descriptions are manifests with no payload that have the "isagroup" variable set. They
|
|
get stored in the manifests table AND a reference is added to the grouplist table. Any
|
|
manifest, including any group manifest, may be a member of zero or one group. This allows a
|
|
nested, i.e., multi-level group hierarchy where sub-groups will only typically be discovered
|
|
by joining the parent group.
|
|
*/
|
|
|
|
int rhizome_manifest_bind_id(rhizome_manifest *m_in)
|
|
{
|
|
if (rhizome_manifest_createid(m_in) == -1)
|
|
return -1;
|
|
/* The ID is implicit in transit, but we need to store it in the file, so that reimporting
|
|
manifests on receiver nodes works easily. We might implement something that strips the id
|
|
variable out of the manifest when sending it, or some other scheme to avoid sending all the
|
|
extra bytes. */
|
|
rhizome_manifest_set(m_in, "id", alloca_tohex_bid(m_in->cryptoSignPublic));
|
|
if (!is_sid_any(m_in->author)) {
|
|
/* Set the BK using the provided authorship information.
|
|
Serval Security Framework defines BK as being:
|
|
BK = privateKey XOR sha512(RS##BID), where BID = cryptoSignPublic,
|
|
and RS is the rhizome secret for the specified author.
|
|
The nice thing about this specification is that:
|
|
privateKey = BK XOR sha512(RS##BID), so the same function can be used
|
|
to encrypt and decrypt the BK field. */
|
|
const unsigned char *rs;
|
|
int rs_len=0;
|
|
unsigned char bkbytes[RHIZOME_BUNDLE_KEY_BYTES];
|
|
|
|
if (rhizome_find_secret(m_in->author,&rs_len,&rs)) {
|
|
return WHYF("Failed to obtain RS for %s to calculate BK",
|
|
alloca_tohex_sid(m_in->author));
|
|
}
|
|
if (!rhizome_secret2bk(m_in->cryptoSignPublic,rs,rs_len,bkbytes,m_in->cryptoSignSecret)) {
|
|
char bkhex[RHIZOME_BUNDLE_KEY_STRLEN + 1];
|
|
(void) tohex(bkhex, bkbytes, RHIZOME_BUNDLE_KEY_BYTES);
|
|
if (debug&DEBUG_RHIZOME) DEBUGF("set BK=%s", bkhex);
|
|
rhizome_manifest_set(m_in, "BK", bkhex);
|
|
} else {
|
|
return WHY("Failed to set BK");
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int rhizome_manifest_bind_file(rhizome_manifest *m_in,const char *filename,int encryptP)
|
|
{
|
|
/* Keep payload file name handy for later */
|
|
m_in->dataFileName = strdup(filename);
|
|
|
|
/* Keep note as to whether we are supposed to be encrypting this file or not */
|
|
m_in->payloadEncryption=encryptP;
|
|
if (encryptP) rhizome_manifest_set_ll(m_in,"crypt",1);
|
|
else rhizome_manifest_set_ll(m_in,"crypt",0);
|
|
|
|
/* Get length of payload. An empty filename means empty payload. */
|
|
if (filename[0]) {
|
|
struct stat stat;
|
|
if (lstat(filename,&stat))
|
|
return WHYF("Could not stat() payload file '%s'",filename);
|
|
m_in->fileLength = stat.st_size;
|
|
} else
|
|
m_in->fileLength = 0;
|
|
if (debug & DEBUG_RHIZOME)
|
|
DEBUGF("filename=%s, fileLength=%lld", filename, m_in->fileLength);
|
|
rhizome_manifest_set_ll(m_in,"filesize",m_in->fileLength);
|
|
|
|
/* Compute hash of non-empty payload */
|
|
if (m_in->fileLength != 0) {
|
|
char hexhashbuf[RHIZOME_FILEHASH_STRLEN + 1];
|
|
if (rhizome_hash_file(m_in,filename, hexhashbuf))
|
|
return WHY("Could not hash file.");
|
|
memcpy(&m_in->fileHexHash[0], &hexhashbuf[0], sizeof hexhashbuf);
|
|
rhizome_manifest_set(m_in, "filehash", m_in->fileHexHash);
|
|
m_in->fileHashedP = 1;
|
|
} else {
|
|
m_in->fileHexHash[0] = '\0';
|
|
rhizome_manifest_del(m_in, "filehash");
|
|
m_in->fileHashedP = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rhizome_manifest_check_file(rhizome_manifest *m_in)
|
|
{
|
|
long long gotfile = 0;
|
|
if (sqlite_exec_int64(&gotfile, "SELECT COUNT(*) FROM FILES WHERE ID='%s' and datavalid=1;", m_in->fileHexHash) != 1) {
|
|
WHYF("Failed to count files");
|
|
return 0;
|
|
}
|
|
if (gotfile) {
|
|
/* Skipping file checks for bundle, as file is already in the database */
|
|
return 0;
|
|
}
|
|
|
|
/* Find out whether the payload is expected to be encrypted or not */
|
|
m_in->payloadEncryption=rhizome_manifest_get_ll(m_in, "crypt");
|
|
|
|
/* Check payload file is accessible and discover its length, then check that it
|
|
matches the file size stored in the manifest */
|
|
long long mfilesize = rhizome_manifest_get_ll(m_in, "filesize");
|
|
m_in->fileLength = 0;
|
|
if (m_in->dataFileName && m_in->dataFileName[0]) {
|
|
struct stat stat;
|
|
if (lstat(m_in->dataFileName,&stat) == -1) {
|
|
if (errno != ENOENT || mfilesize != 0)
|
|
return WHYF_perror("stat(%s)", m_in->dataFileName);
|
|
} else {
|
|
m_in->fileLength = stat.st_size;
|
|
}
|
|
}
|
|
if (debug & DEBUG_RHIZOME)
|
|
DEBUGF("filename=%s, fileLength=%lld", m_in->dataFileName ? alloca_str_toprint(m_in->dataFileName) : "NULL", m_in->fileLength);
|
|
if (mfilesize != -1 && mfilesize != m_in->fileLength) {
|
|
WHYF("Manifest.filesize (%lld) != actual file size (%lld)", mfilesize, m_in->fileLength);
|
|
return -1;
|
|
}
|
|
|
|
/* If payload is empty, ensure manifest has not file hash, otherwis compute the hash of the
|
|
payload and check that it matches manifest. */
|
|
const char *mhexhash = rhizome_manifest_get(m_in, "filehash", NULL, 0);
|
|
if (m_in->fileLength != 0) {
|
|
char hexhashbuf[RHIZOME_FILEHASH_STRLEN + 1];
|
|
if (rhizome_hash_file(m_in,m_in->dataFileName, hexhashbuf))
|
|
return WHY("Could not hash file.");
|
|
memcpy(&m_in->fileHexHash[0], &hexhashbuf[0], sizeof hexhashbuf);
|
|
m_in->fileHashedP = 1;
|
|
if (!mhexhash) return WHY("manifest contains no file hash");
|
|
if (mhexhash && strcmp(m_in->fileHexHash, mhexhash)) {
|
|
WHYF("Manifest.filehash (%s) does not match payload hash (%s)", mhexhash, m_in->fileHexHash);
|
|
return -1;
|
|
}
|
|
} else {
|
|
if (mhexhash != NULL) {
|
|
WHYF("Manifest.filehash (%s) should be absent for empty payload", mhexhash);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Check if a manifest is already stored for the same payload with the same details.
|
|
This catches the case of "dna rhizome add file <filename>" on the same file more than once.
|
|
(Debounce!) */
|
|
int rhizome_manifest_check_duplicate(rhizome_manifest *m_in, rhizome_manifest **m_out)
|
|
{
|
|
if (debug & DEBUG_RHIZOME) DEBUG("Checking for duplicate");
|
|
if (m_out) *m_out = NULL;
|
|
rhizome_manifest *dupm = NULL;
|
|
if (rhizome_find_duplicate(m_in, &dupm,0 /* version doesn't matter */) == -1)
|
|
return WHY("Errors encountered searching for duplicate manifest");
|
|
if (dupm) {
|
|
/* If the caller wants the duplicate manifest, it must be finalised, otherwise discarded. */
|
|
if (m_out) {
|
|
*m_out = dupm;
|
|
}
|
|
else
|
|
rhizome_manifest_free(dupm);
|
|
if (debug & DEBUG_RHIZOME) DEBUG("Found a duplicate");
|
|
return 2;
|
|
}
|
|
if (debug & DEBUG_RHIZOME) DEBUG("No duplicate found");
|
|
return 0;
|
|
}
|
|
|
|
int rhizome_add_manifest(rhizome_manifest *m_in,int ttl)
|
|
{
|
|
if (debug & DEBUG_RHIZOME)
|
|
DEBUGF("rhizome_add_manifest(m_in=%p, ttl=%d)",m_in, ttl);
|
|
|
|
if (m_in->finalised==0)
|
|
return WHY("Manifest must be finalised before being stored");
|
|
|
|
/* Store time to live, clamped to within legal range */
|
|
m_in->ttl = ttl < 0 ? 0 : ttl > 254 ? 254 : ttl;
|
|
|
|
if (rhizome_manifest_check_sanity(m_in))
|
|
return WHY("Sanity checks on manifest failed");
|
|
|
|
if (rhizome_manifest_check_file(m_in))
|
|
return WHY("File does not belong to this manifest");
|
|
|
|
/* Get manifest version number. */
|
|
m_in->version = rhizome_manifest_get_ll(m_in, "version");
|
|
if (m_in->version==-1)
|
|
return WHY("Manifest must have a version number");
|
|
|
|
/* Supply manifest version number if missing, so we can do the version check below */
|
|
if (m_in->version == -1) {
|
|
m_in->version = gettime_ms();
|
|
rhizome_manifest_set_ll(m_in, "version", m_in->version);
|
|
}
|
|
|
|
/* If the manifest already has an ID */
|
|
char id[SID_STRLEN + 1];
|
|
if (rhizome_manifest_get(m_in, "id", id, SID_STRLEN + 1)) {
|
|
str_toupper_inplace(id);
|
|
/* Discard the new manifest unless it is newer than the most recent known version with the same ID */
|
|
long long storedversion = -1;
|
|
switch (sqlite_exec_int64(&storedversion, "SELECT version from manifests where id='%s';", id)) {
|
|
case -1:
|
|
return WHY("Select failed");
|
|
case 0:
|
|
if (debug & DEBUG_RHIZOME) DEBUG("No existing manifest");
|
|
break;
|
|
case 1:
|
|
if (debug & DEBUG_RHIZOME) DEBUGF("Found existing version=%lld, new version=%lld", storedversion, m_in->version);
|
|
if (m_in->version < storedversion)
|
|
return WHY("Newer version exists");
|
|
if (m_in->version == storedversion)
|
|
return WHY("Same version of manifest exists, not adding");
|
|
break;
|
|
default:
|
|
return WHY("Select found too many rows!");
|
|
}
|
|
} else {
|
|
/* no manifest ID */
|
|
return WHY("Manifest does not have an ID");
|
|
}
|
|
|
|
/* Okay, it is written, and can be put directly into the rhizome database now */
|
|
if (rhizome_store_bundle(m_in) == -1)
|
|
return WHY("rhizome_store_bundle() failed.");
|
|
|
|
// This message used in tests; do not modify or remove.
|
|
const char *service = rhizome_manifest_get(m_in, "service", NULL, 0);
|
|
INFOF("RHIZOME ADD MANIFEST service=%s bid=%s version=%lld",
|
|
service ? service : "NULL",
|
|
alloca_tohex_sid(m_in->cryptoSignPublic),
|
|
m_in->version
|
|
);
|
|
monitor_announce_bundle(m_in);
|
|
return 0;
|
|
}
|
|
|
|
/* Update an existing Rhizome bundle */
|
|
int rhizome_bundle_push_update(char *id,long long version,unsigned char *data,int appendP)
|
|
{
|
|
return WHY("Not implemented");
|
|
}
|
|
|
|
/* When voice traffic is being carried, we need to throttle Rhizome down
|
|
to a more sensible level. Or possibly even supress it entirely.
|
|
*/
|
|
time_ms_t rhizome_voice_timeout = -1;
|
|
int rhizome_saw_voice_traffic()
|
|
{
|
|
/* We are in "voice mode" for a second after sending a voice frame */
|
|
rhizome_voice_timeout=gettime_ms()+1000;
|
|
return 0;
|
|
}
|