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added key id to help signature verification

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-GenericTunneling@6314 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
csoler 2013-04-18 19:25:45 +00:00
parent dc0193ae66
commit d4a7c9ce2e
2 changed files with 34 additions and 14 deletions
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1
libretroshare/src/retroshare/rsmsgs.h
View File

@ -152,6 +152,7 @@ public:
#define RS_DISTANT_CHAT_ERROR_NO_ERROR 0x0000 ; #define RS_DISTANT_CHAT_ERROR_NO_ERROR 0x0000 ;
#define RS_DISTANT_CHAT_ERROR_DECRYPTION_FAILED 0x0001 ; #define RS_DISTANT_CHAT_ERROR_DECRYPTION_FAILED 0x0001 ;
#define RS_DISTANT_CHAT_ERROR_SIGNATURE_MISMATCH 0x0002 ; #define RS_DISTANT_CHAT_ERROR_SIGNATURE_MISMATCH 0x0002 ;
#define RS_DISTANT_CHAT_ERROR_UNKNOWN_KEY 0x0003 ;
class ChatInfo class ChatInfo
{ {

45
libretroshare/src/services/p3chatservice.cc
View File

@ -59,6 +59,8 @@ static const time_t MAX_KEEP_PUBLIC_LOBBY_RECORD = 60 ; // keep inactiv
static const time_t MIN_DELAY_BETWEEN_PUBLIC_LOBBY_REQ = 20 ; // don't ask for lobby list more than once every 30 secs. static const time_t MIN_DELAY_BETWEEN_PUBLIC_LOBBY_REQ = 20 ; // don't ask for lobby list more than once every 30 secs.
static const time_t DISTANT_CHAT_CLEANING_PERIOD = 60 ; // don't ask for lobby list more than once every 30 secs. static const time_t DISTANT_CHAT_CLEANING_PERIOD = 60 ; // don't ask for lobby list more than once every 30 secs.
static const uint32_t DISTANT_CHAT_AES_KEY_SIZE = 16 ; // size of AES encryption key for distant chat.
static const uint32_t DISTANT_CHAT_HASH_SIZE = 16 ; // This is sha1 size in bytes.
p3ChatService::p3ChatService(p3LinkMgr *lm, p3HistoryMgr *historyMgr) p3ChatService::p3ChatService(p3LinkMgr *lm, p3HistoryMgr *historyMgr)
:p3Service(RS_SERVICE_TYPE_CHAT), p3Config(CONFIG_TYPE_CHAT), mChatMtx("p3ChatService"), mLinkMgr(lm) , mHistoryMgr(historyMgr) :p3Service(RS_SERVICE_TYPE_CHAT), p3Config(CONFIG_TYPE_CHAT), mChatMtx("p3ChatService"), mLinkMgr(lm) , mHistoryMgr(historyMgr)
@ -2828,7 +2830,7 @@ void p3ChatService::receiveTurtleData( RsTurtleGenericTunnelItem *gitem,const st
std::cerr << " size = " << item->data_size << std::endl; std::cerr << " size = " << item->data_size << std::endl;
std::cerr << " data = " << (void*)item->data_bytes << std::endl; std::cerr << " data = " << (void*)item->data_bytes << std::endl;
uint8_t aes_key[16] ; uint8_t aes_key[DISTANT_CHAT_AES_KEY_SIZE] ;
{ {
RsStackMutex stack(mChatMtx); /********** STACK LOCKED MTX ******/ RsStackMutex stack(mChatMtx); /********** STACK LOCKED MTX ******/
@ -2892,7 +2894,7 @@ void p3ChatService::sendTurtleData(RsChatItem *item, const std::string& virtual_
return ; return ;
} }
uint8_t aes_key[16] ; uint8_t aes_key[DISTANT_CHAT_AES_KEY_SIZE] ;
{ {
RsStackMutex stack(mChatMtx); /********** STACK LOCKED MTX ******/ RsStackMutex stack(mChatMtx); /********** STACK LOCKED MTX ******/
@ -2950,12 +2952,12 @@ bool p3ChatService::createDistantChatInvite(const std::string& pgp_id,time_t tim
invite.time_of_creation = now ; invite.time_of_creation = now ;
invite.last_hit_time = now ; invite.last_hit_time = now ;
RAND_bytes( (unsigned char *)&invite.aes_key[0],16 ) ; // generate a random AES encryption key RAND_bytes( (unsigned char *)&invite.aes_key[0],DISTANT_CHAT_AES_KEY_SIZE ) ; // generate a random AES encryption key
// Create a random hash for that invite. // Create a random hash for that invite.
// //
unsigned char hash_bytes[16] ; unsigned char hash_bytes[DISTANT_CHAT_HASH_SIZE] ;
RAND_bytes( hash_bytes, 16) ; RAND_bytes( hash_bytes, DISTANT_CHAT_HASH_SIZE) ;
std::string hash = SSLIdType(hash_bytes).toStdString(false) ; std::string hash = SSLIdType(hash_bytes).toStdString(false) ;
@ -2980,14 +2982,20 @@ bool p3ChatService::createDistantChatInvite(const std::string& pgp_id,time_t tim
// //
// retroshare://chat?time_stamp=3243242&private_data=[radix64 string] // retroshare://chat?time_stamp=3243242&private_data=[radix64 string]
unsigned char *data = new unsigned char[16+16+400] ; uint32_t header_size = DISTANT_CHAT_AES_KEY_SIZE + DISTANT_CHAT_HASH_SIZE + KEY_ID_SIZE;
memcpy(data ,hash_bytes ,16) ; unsigned char *data = new unsigned char[header_size+400] ;
memcpy(data+16,invite.aes_key ,16) ;
PGPFingerprintType fingerprint ;
AuthGPG::getAuthGPG()->getKeyFingerprint( PGPIdType(AuthGPG::getAuthGPG()->getGPGOwnId()),fingerprint ) ;
memcpy(data ,hash_bytes ,DISTANT_CHAT_HASH_SIZE) ;
memcpy(data+DISTANT_CHAT_HASH_SIZE ,invite.aes_key ,DISTANT_CHAT_AES_KEY_SIZE) ;
memcpy(data+DISTANT_CHAT_HASH_SIZE+DISTANT_CHAT_AES_KEY_SIZE,fingerprint.toByteArray(),KEY_ID_SIZE) ;
std::cerr << "Performing signature " << std::endl; std::cerr << "Performing signature " << std::endl;
uint32_t signlen = 400; uint32_t signlen = 400;
if(!AuthGPG::getAuthGPG()->SignDataBin(data,32,data+32,&signlen)) if(!AuthGPG::getAuthGPG()->SignDataBin(data,header_size,data+header_size,&signlen))
return false ; return false ;
std::cerr << "Signature length = " << signlen << std::endl; std::cerr << "Signature length = " << signlen << std::endl;
@ -2997,7 +3005,7 @@ bool p3ChatService::createDistantChatInvite(const std::string& pgp_id,time_t tim
unsigned char *encrypted_data = new unsigned char[2000] ; unsigned char *encrypted_data = new unsigned char[2000] ;
uint32_t encrypted_size = 2000 ; uint32_t encrypted_size = 2000 ;
if(!AuthGPG::getAuthGPG()->encryptDataBin(pgp_id,(unsigned char *)data,signlen+32,encrypted_data,&encrypted_size)) if(!AuthGPG::getAuthGPG()->encryptDataBin(pgp_id,(unsigned char *)data,signlen+header_size,encrypted_data,&encrypted_size))
return false ; return false ;
std::cerr << "Encrypted data size: " << encrypted_size << std::endl; std::cerr << "Encrypted data size: " << encrypted_size << std::endl;
@ -3041,18 +3049,29 @@ bool p3ChatService::initiateDistantChatConnexion(const std::string& encrypted_st
std::cerr << "Chat invite was successfuly decrypted!" << std::endl; std::cerr << "Chat invite was successfuly decrypted!" << std::endl;
if(!AuthGPG::VerifySignBin(data,32,data+32,data_size-32,fingerprint)) uint32_t header_size = DISTANT_CHAT_HASH_SIZE + DISTANT_CHAT_AES_KEY_SIZE + KEY_ID_SIZE ;
PGPIdType pgp_id( data + DISTANT_CHAT_HASH_SIZE + DISTANT_CHAT_AES_KEY_SIZE ) ;
PGPFingerprintType fingerprint ;
if(!AuthGPG::getAuthGPG()->getKeyFingerprint(pgp_id,fingerprint))
{
error_code = RS_DISTANT_CHAT_ERROR_UNKNOWN_KEY ;
return false ;
}
if(!AuthGPG::getAuthGPG()->VerifySignBin(data,header_size,data+header_size,data_size-header_size,fingerprint.toStdString()))
{ {
error_code = RS_DISTANT_CHAT_ERROR_SIGNATURE_MISMATCH ; error_code = RS_DISTANT_CHAT_ERROR_SIGNATURE_MISMATCH ;
return false ; return false ;
} }
std::cerr << "Signature successfuly verified!" << std::endl; std::cerr << "Signature successfuly verified!" << std::endl;
hash = t_RsGenericIdType<16>(data).toStdString() ; hash = t_RsGenericIdType<DISTANT_CHAT_HASH_SIZE>(data).toStdString() ;
DistantChatPeerInfo info ; DistantChatPeerInfo info ;
info.last_contact = time(NULL) ; info.last_contact = time(NULL) ;
memcpy(info.aes_key,data+16,16) ; memcpy(info.aes_key,data+DISTANT_CHAT_HASH_SIZE,DISTANT_CHAT_AES_KEY_SIZE) ;
_distant_chat_peers[hash] = info ; _distant_chat_peers[hash] = info ;