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moved static/parsing of radix parts of short invites into RsCertificate (more code should be moved static there) and fixed adding incoming keys to friend server

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This commit is contained in:
csoler 2021-11-01 10:47:07 +01:00
parent 5da31592f2
commit b7c7c4c3f5
4 changed files with 171 additions and 155 deletions
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135
libretroshare/src/pgp/rscertificate.cc
View File

@ -28,6 +28,7 @@
#include <retroshare/rspeers.h>
#include <util/radix64.h>
#include <pgp/pgpkeyutil.h>
#include <pgp/pgphandler.h>
#include "rscertificate.h"
#include "util/rsstring.h"
#include "util/stacktrace.h"
@ -621,6 +622,140 @@ bool RsCertificate::cleanRadix64(const std::string& instr,std::string& str,uint3
return true ;
}
bool RsCertificate::decodeRadix64ShortInvite(const std::string& rsInvite, RsPeerDetails& details, uint32_t& err_code)
{
err_code = 0;
std::vector<uint8_t> bf = Radix64::decode(rsInvite);
size_t size = bf.size();
unsigned char* buf = bf.data();
size_t total_s = 0;
bool CRC_ok = false ; // not checked yet
while(total_s < size)
{
RsShortInviteFieldType ptag = RsShortInviteFieldType(buf[0]);
buf = &buf[1];
unsigned char *buf2 = buf;
uint32_t s = 0;
try { s = PGPKeyParser::read_125Size(buf); }
catch (...)
{
err_code = CERTIFICATE_PARSING_ERROR_SIZE_ERROR;
return false;
}
total_s += 1 + ( reinterpret_cast<size_t>(buf) - reinterpret_cast<size_t>(buf2) );
if(total_s > size)
{
err_code = CERTIFICATE_PARSING_ERROR_SIZE_ERROR;
return false;
}
Dbg3() << __PRETTY_FUNCTION__ << " Read ptag: "
<< static_cast<uint32_t>(ptag)
<< ", size " << s << ", total_s = " << total_s
<< ", expected total = " << size << std::endl;
switch(ptag)
{
case RsShortInviteFieldType::SSL_ID:
details.id = RsPeerId::fromBufferUnsafe(buf) ;
break;
case RsShortInviteFieldType::PEER_NAME:
details.name = std::string((char*)buf,s);
break;
case RsShortInviteFieldType::PGP_FINGERPRINT:
details.fpr = RsPgpFingerprint::fromBufferUnsafe(buf);
details.gpg_id = PGPHandler::pgpIdFromFingerprint(details.fpr);
break;
case RsShortInviteFieldType::LOCATOR:
{
std::string locatorStr((char*)buf,s);
details.ipAddressList.push_back(locatorStr);
}
break;
case RsShortInviteFieldType::DNS_LOCATOR:
details.extPort = (((int)buf[0]) << 8) + buf[1];
details.dyndns = std::string((char*)&buf[2],s-2);
break;
case RsShortInviteFieldType::LOC4_LOCATOR:
{
uint32_t t4Addr = (((uint32_t)buf[0]) << 24)+(((uint32_t)buf[1])<<16)+(((uint32_t)buf[2])<<8) + (uint32_t)buf[3];
sockaddr_in tLocalAddr;
tLocalAddr.sin_addr.s_addr = t4Addr;
details.localAddr = rs_inet_ntoa(tLocalAddr.sin_addr);
details.localPort = (((uint32_t)buf[4])<<8) + (uint32_t)buf[5];
}
break;
case RsShortInviteFieldType::EXT4_LOCATOR:
{
uint32_t t4Addr = (((uint32_t)buf[0]) << 24)+(((uint32_t)buf[1])<<16)+(((uint32_t)buf[2])<<8) + (uint32_t)buf[3];
sockaddr_in tExtAddr;
tExtAddr.sin_addr.s_addr = t4Addr;
details.extAddr = rs_inet_ntoa(tExtAddr.sin_addr);
details.extPort = (((uint32_t)buf[4])<<8) + (uint32_t)buf[5];
}
break;
case RsShortInviteFieldType::HIDDEN_LOCATOR:
details.hiddenType = (((uint32_t)buf[0]) << 24)+(((uint32_t)buf[1])<<16)+(((uint32_t)buf[2])<<8) + (uint32_t)buf[3];
details.hiddenNodePort = (((uint32_t)buf[4]) << 8)+ (uint32_t)buf[5];
details.isHiddenNode = true;
details.hiddenNodeAddress = std::string((char*)&buf[6],s-6);
break;
case RsShortInviteFieldType::CHECKSUM:
{
if(s != 3 || total_s+3 != size) // make sure the checksum is the last section
{
err_code = CERTIFICATE_PARSING_ERROR_INVALID_CHECKSUM_SECTION;
return false;
}
uint32_t computed_crc = PGPKeyManagement::compute24bitsCRC(bf.data(),size-5);
uint32_t certificate_crc = static_cast<uint32_t>( buf[0] + (buf[1] << 8) + (buf[2] << 16) );
if(computed_crc != certificate_crc)
{
err_code = CERTIFICATE_PARSING_ERROR_CHECKSUM_ERROR;
return false;
}
CRC_ok = true;
break;
}
}
buf = &buf[s];
total_s += s;
}
if(details.id.isNull())
{
err_code = CERTIFICATE_PARSING_ERROR_MISSING_LOCATION_ID;
return false;
}
if(!CRC_ok)
{
err_code = CERTIFICATE_PARSING_ERROR_CHECKSUM_ERROR;
return false;
}
return true;
}

17
libretroshare/src/pgp/rscertificate.h
View File

@ -36,6 +36,21 @@ struct RsPeerDetails;
class RsCertificate
{
public:
enum class RsShortInviteFieldType : uint8_t
{
SSL_ID = 0x00,
PEER_NAME = 0x01,
LOCATOR = 0x02,
PGP_FINGERPRINT = 0x03,
CHECKSUM = 0x04,
/* The following will be deprecated, and ported to LOCATOR when generic transport layer will be implemented */
HIDDEN_LOCATOR = 0x90,
DNS_LOCATOR = 0x91,
EXT4_LOCATOR = 0x92, // external IPv4 address
LOC4_LOCATOR = 0x93 // local IPv4 address
};
typedef enum { RS_CERTIFICATE_OLD_FORMAT, RS_CERTIFICATE_RADIX, RS_CERTIFICATE_SHORT_RADIX } Format;
/**
@ -64,6 +79,8 @@ public:
~RsCertificate();
static bool decodeRadix64ShortInvite(const std::string& short_invite_b64,RsPeerDetails& det,uint32_t& error_code);
/// Convert to certificate radix string
std::string toStdString() const;

170
libretroshare/src/rsserver/p3peers.cc
View File

@ -48,6 +48,7 @@
#include "pqi/authssl.h"
typedef RsCertificate::RsShortInviteFieldType RsShortInviteFieldType; // locally in this file to avoid renaming everything.
RsPeers *rsPeers = NULL;
@ -1159,22 +1160,6 @@ bool p3Peers::GetPGPBase64StringAndCheckSum(
return true;
}
enum class RsShortInviteFieldType : uint8_t
{
SSL_ID = 0x00,
PEER_NAME = 0x01,
LOCATOR = 0x02,
PGP_FINGERPRINT = 0x03,
CHECKSUM = 0x04,
/* The following will be deprecated, and ported to LOCATOR when generic
* trasport layer will be implemented */
HIDDEN_LOCATOR = 0x90,
DNS_LOCATOR = 0x91,
EXT4_LOCATOR = 0x92, // external IPv4 address
LOC4_LOCATOR = 0x93 // local IPv4 address
};
static void addPacketHeader(RsShortInviteFieldType ptag, size_t size, unsigned char *& buf, uint32_t& offset, uint32_t& buf_size)
{
// Check that the buffer has sufficient size. If not, increase it.
@ -1351,136 +1336,23 @@ bool p3Peers::getShortInvite(std::string& invite, const RsPeerId& _sslId, Retros
bool p3Peers::parseShortInvite(const std::string& inviteStrUrl, RsPeerDetails& details, uint32_t &err_code )
{
if(inviteStrUrl.empty())
{
RsErr() << __PRETTY_FUNCTION__ << " can't parse empty invite"
<< std::endl;
return false;
}
std::string rsInvite = inviteStrUrl;
if(inviteStrUrl.empty())
{
RsErr() << __PRETTY_FUNCTION__ << " can't parse empty invite"
<< std::endl;
return false;
}
std::string rsInvite = inviteStrUrl;
RsUrl inviteUrl(inviteStrUrl);
RsUrl inviteUrl(inviteStrUrl);
if(inviteUrl.hasQueryK("rsInvite"))
rsInvite = *inviteUrl.getQueryV("rsInvite");
if(inviteUrl.hasQueryK("rsInvite"))
rsInvite = *inviteUrl.getQueryV("rsInvite");
std::vector<uint8_t> bf = Radix64::decode(rsInvite);
size_t size = bf.size();
if(!RsCertificate::decodeRadix64ShortInvite(rsInvite, details, err_code))
return false;
unsigned char* buf = bf.data();
size_t total_s = 0;
bool CRC_ok = false ; // not checked yet
while(total_s < size)
{
RsShortInviteFieldType ptag = RsShortInviteFieldType(buf[0]);
buf = &buf[1];
unsigned char *buf2 = buf;
uint32_t s = 0;
try { s = PGPKeyParser::read_125Size(buf); }
catch (...)
{
err_code = CERTIFICATE_PARSING_ERROR_SIZE_ERROR;
return false;
}
total_s += 1 + ( reinterpret_cast<size_t>(buf) - reinterpret_cast<size_t>(buf2) );
if(total_s > size)
{
err_code = CERTIFICATE_PARSING_ERROR_SIZE_ERROR;
return false;
}
Dbg3() << __PRETTY_FUNCTION__ << " Read ptag: "
<< static_cast<uint32_t>(ptag)
<< ", size " << s << ", total_s = " << total_s
<< ", expected total = " << size << std::endl;
switch(ptag)
{
case RsShortInviteFieldType::SSL_ID:
details.id = RsPeerId::fromBufferUnsafe(buf) ;
break;
case RsShortInviteFieldType::PEER_NAME:
details.name = std::string((char*)buf,s);
break;
case RsShortInviteFieldType::PGP_FINGERPRINT:
details.fpr = RsPgpFingerprint::fromBufferUnsafe(buf);
details.gpg_id = PGPHandler::pgpIdFromFingerprint(details.fpr);
break;
case RsShortInviteFieldType::LOCATOR:
{
std::string locatorStr((char*)buf,s);
details.ipAddressList.push_back(locatorStr);
}
break;
case RsShortInviteFieldType::DNS_LOCATOR:
details.extPort = (((int)buf[0]) << 8) + buf[1];
details.dyndns = std::string((char*)&buf[2],s-2);
break;
case RsShortInviteFieldType::LOC4_LOCATOR:
{
uint32_t t4Addr = (((uint32_t)buf[0]) << 24)+(((uint32_t)buf[1])<<16)+(((uint32_t)buf[2])<<8) + (uint32_t)buf[3];
sockaddr_in tLocalAddr;
tLocalAddr.sin_addr.s_addr = t4Addr;
details.localAddr = rs_inet_ntoa(tLocalAddr.sin_addr);
details.localPort = (((uint32_t)buf[4])<<8) + (uint32_t)buf[5];
}
break;
case RsShortInviteFieldType::EXT4_LOCATOR:
{
uint32_t t4Addr = (((uint32_t)buf[0]) << 24)+(((uint32_t)buf[1])<<16)+(((uint32_t)buf[2])<<8) + (uint32_t)buf[3];
sockaddr_in tExtAddr;
tExtAddr.sin_addr.s_addr = t4Addr;
details.extAddr = rs_inet_ntoa(tExtAddr.sin_addr);
details.extPort = (((uint32_t)buf[4])<<8) + (uint32_t)buf[5];
}
break;
case RsShortInviteFieldType::HIDDEN_LOCATOR:
details.hiddenType = (((uint32_t)buf[0]) << 24)+(((uint32_t)buf[1])<<16)+(((uint32_t)buf[2])<<8) + (uint32_t)buf[3];
details.hiddenNodePort = (((uint32_t)buf[4]) << 8)+ (uint32_t)buf[5];
details.isHiddenNode = true;
details.hiddenNodeAddress = std::string((char*)&buf[6],s-6);
break;
case RsShortInviteFieldType::CHECKSUM:
{
if(s != 3 || total_s+3 != size) // make sure the checksum is the last section
{
err_code = CERTIFICATE_PARSING_ERROR_INVALID_CHECKSUM_SECTION;
return false;
}
uint32_t computed_crc = PGPKeyManagement::compute24bitsCRC(bf.data(),size-5);
uint32_t certificate_crc = static_cast<uint32_t>( buf[0] + (buf[1] << 8) + (buf[2] << 16) );
if(computed_crc != certificate_crc)
{
err_code = CERTIFICATE_PARSING_ERROR_CHECKSUM_ERROR;
return false;
}
CRC_ok = true;
break;
}
}
buf = &buf[s];
total_s += s;
}
// now check if the PGP key is available. If so, add it in the PeerDetails:
// Also check if the PGP key is available. If so, add it in the PeerDetails:
RsPeerDetails pgp_det ;
if(getGPGDetails(PGPHandler::pgpIdFromFingerprint(details.fpr),pgp_det) && pgp_det.fpr == details.fpr)
@ -1497,23 +1369,13 @@ bool p3Peers::parseShortInvite(const std::string& inviteStrUrl, RsPeerDetails& d
else
details.skip_pgp_signature_validation = true;
if(!CRC_ok)
{
err_code = CERTIFICATE_PARSING_ERROR_CHECKSUM_ERROR;
return false;
}
if(details.gpg_id.isNull())
{
err_code = CERTIFICATE_PARSING_ERROR_MISSING_PGP_FINGERPRINT;
return false;
}
if(details.id.isNull())
{
err_code = CERTIFICATE_PARSING_ERROR_MISSING_LOCATION_ID;
return false;
}
err_code = CERTIFICATE_PARSING_ERROR_NO_ERROR;
return true;
err_code = CERTIFICATE_PARSING_ERROR_NO_ERROR;
return true;
}
bool p3Peers::acceptInvite( const std::string& invite,

4
retroshare-friendserver/src/friendserver.cc
View File

@ -4,6 +4,8 @@
#include "util/rsbase64.h"
#include "util/radix64.h"
#include "pgp/rscertificate.h"
#include "friendserver.h"
#include "friend_server/fsitem.h"
@ -92,7 +94,7 @@ void FriendServer::handleClientPublish(const RsFriendServerClientPublishItem *it
RsPeerDetails shortInviteDetails;
uint32_t errorCode = 0;
if(item->short_invite.empty() || !rsPeers->parseShortInvite(item->short_invite, shortInviteDetails,errorCode ))
if(item->short_invite.empty() || !RsCertificate::decodeRadix64ShortInvite(item->short_invite, shortInviteDetails,errorCode ))
throw std::runtime_error("Could not parse short certificate. Error = " + RsUtil::NumberToString(errorCode));
RsDbg() << " Short invite is fine. PGP fingerprint: " << shortInviteDetails.fpr ;