// calculate secret key, return true or false int __cdecl cpp_calc_keyx(HANDLE context) { pCNTX ptr = get_context_on_id(context); if(!ptr) return 0; pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr); if(!p->KeyA) { ptr->error = ERROR_NO_KEYA; return 0; } if(!p->KeyB) { ptr->error = ERROR_NO_KEYB; return 0; } ptr->error = ERROR_NONE; BYTE agreeVal[KEYSIZE]; memset(agreeVal,0,sizeof(agreeVal)); BYTE agr = p->dh->Agree(agreeVal, p->KeyA, p->KeyB, true); // calculate key if (agr) { // not needed anymore SAFE_FREE(p->PubA); SAFE_FREE(p->KeyA); SAFE_FREE(p->KeyB); // SAFE_DELETE(p->dh); BYTE buffer[Tiger::DIGESTSIZE]; // buffer for hash memset(buffer,0,sizeof(buffer)); // do this only if key exchanged is ok // we use a 192bit key (24*8) Tiger().CalculateDigest(buffer, agreeVal, KEYSIZE); // calculate hash // store key SAFE_FREE(p->KeyX); p->KeyX = (PBYTE) malloc(Tiger::DIGESTSIZE); memcpy(p->KeyX,buffer,Tiger::DIGESTSIZE); } return (int)agr; }
// decode message from UTF8 if need, return ANSIzUCS2z LPSTR __cdecl cpp_decode(HANDLE context, LPCSTR szEncMsg) { pCNTX ptr = get_context_on_id(context); if (!ptr) return NULL; cpp_alloc_pdata(ptr); pSIMDATA p = (pSIMDATA)ptr->pdata; if (!p->KeyX) { ptr->error = ERROR_NO_KEYX; return NULL; } LPSTR szNewMsg = NULL; LPSTR szOldMsg = cpp_decrypt(ptr, szEncMsg); if (szOldMsg) { if (ptr->features & FEATURES_UTF8) { // utf8 message: convert to unicode -> ansii LPWSTR wstring = utf8decode(szOldMsg); int wlen = (int)wcslen(wstring) + 1; szNewMsg = (LPSTR)mir_alloc(wlen*(sizeof(WCHAR)+2)); // [email protected] WideCharToMultiByte(CP_ACP, 0, wstring, -1, szNewMsg, wlen, 0, 0); memcpy(szNewMsg + strlen(szNewMsg) + 1, wstring, wlen*sizeof(WCHAR)); // [email protected] } else { // ansi message: convert to unicode int slen = (int)strlen(szOldMsg) + 1; szNewMsg = (LPSTR)mir_alloc(slen*(sizeof(WCHAR)+1)); memcpy(szNewMsg, szOldMsg, slen); WCHAR* wstring = (LPWSTR)alloca(slen*sizeof(WCHAR)); MultiByteToWideChar(CP_ACP, 0, szOldMsg, -1, wstring, slen*sizeof(WCHAR)); memcpy(szNewMsg + slen, wstring, slen*sizeof(WCHAR)); } } replaceStr(ptr->tmp, szNewMsg); return szNewMsg; }
// decode message return UTF8z LPSTR __cdecl cpp_decodeU(HANDLE context, LPCSTR szEncMsg) { pCNTX ptr = get_context_on_id(context); if (!ptr) return NULL; cpp_alloc_pdata(ptr); pSIMDATA p = (pSIMDATA)ptr->pdata; if (!p->KeyX) { ptr->error = ERROR_NO_KEYX; return NULL; } LPSTR szNewMsg = NULL; LPSTR szOldMsg = cpp_decrypt(ptr, szEncMsg); if (szOldMsg) { if (ptr->features & FEATURES_UTF8) { // utf8 message: copy szNewMsg = mir_strdup(szOldMsg); } else { // ansi message: convert to utf8 int slen = (int)strlen(szOldMsg) + 1; LPWSTR wstring = (LPWSTR)alloca(slen*sizeof(WCHAR)); MultiByteToWideChar(CP_ACP, 0, szOldMsg, -1, wstring, slen*sizeof(WCHAR)); szNewMsg = mir_strdup(utf8encode(wstring)); } } replaceStr(ptr->tmp, szNewMsg); return szNewMsg; }
// encode message from UTF8 LPSTR __cdecl cpp_encodeU(HANDLE context, LPCSTR msg) { pCNTX ptr = get_context_on_id(context); if (!ptr) return NULL; cpp_alloc_pdata(ptr); pSIMDATA p = (pSIMDATA)ptr->pdata; if (!p->KeyX) { ptr->error = ERROR_NO_KEYX; return NULL; } LPSTR szNewMsg = NULL; LPSTR szOldMsg = (LPSTR)msg; if (ptr->features & FEATURES_UTF8) { // utf8 message: encrypt. szNewMsg = cpp_encrypt(ptr, szOldMsg); } else { // utf8 message: convert to ansi and encrypt. LPWSTR wstring = utf8decode(szOldMsg); int wlen = (int)wcslen(wstring) + 1; LPSTR astring = (LPSTR)alloca(wlen); WideCharToMultiByte(CP_ACP, 0, (LPWSTR)szOldMsg, -1, astring, wlen, 0, 0); szNewMsg = cpp_encrypt(ptr, astring); } return szNewMsg; }
// encode message from ANSI into UTF8 if need LPSTR __cdecl cpp_encodeA(HANDLE context, LPCSTR msg) { pCNTX ptr = get_context_on_id(context); if (!ptr) return NULL; cpp_alloc_pdata(ptr); pSIMDATA p = (pSIMDATA)ptr->pdata; if (!p->KeyX) { ptr->error = ERROR_NO_KEYX; return NULL; } LPSTR szNewMsg = NULL; LPSTR szOldMsg = (LPSTR)msg; if (ptr->features & FEATURES_UTF8) { // ansi message: convert to unicode->utf-8 and encrypt. int slen = (int)strlen(szOldMsg) + 1; LPWSTR wstring = (LPWSTR)alloca(slen*sizeof(WCHAR)); MultiByteToWideChar(CP_ACP, 0, szOldMsg, -1, wstring, slen*sizeof(WCHAR)); // encrypt szNewMsg = cpp_encrypt(ptr, utf8encode(wstring)); } else { // ansi message: encrypt. szNewMsg = cpp_encrypt(ptr, szOldMsg); } return szNewMsg; }
LPSTR __cdecl pgp_encode(HANDLE context, LPCSTR szPlainMsg) { pCNTX ptr = get_context_on_id(context); if(!ptr) return NULL; pPGPDATA p = (pPGPDATA) cpp_alloc_pdata(ptr); if( !p->pgpKeyID && !p->pgpKey ) { ptr->error = ERROR_NO_PGP_KEY; return NULL; } // utf8 message: encrypt. return pgp_encrypt(ptr, szPlainMsg); }
int __cdecl pgp_set_keyid(HANDLE context, PVOID RemoteKeyID) { pCNTX ptr = get_context_on_id(context); if(!ptr) return 0; pPGPDATA p = (pPGPDATA) cpp_alloc_pdata(ptr); ptr->error = ERROR_NONE; SAFE_FREE(p->pgpKeyID); p->pgpKeyID = (PBYTE) malloc(p_pgp_size_keyid()); memcpy(p->pgpKeyID,RemoteKeyID,p_pgp_size_keyid()); return 1; }
int __cdecl pgp_set_key(HANDLE context, LPCSTR RemoteKey) { pCNTX ptr = get_context_on_id(context); if(!ptr) return 0; pPGPDATA p = (pPGPDATA) cpp_alloc_pdata(ptr); ptr->error = ERROR_NONE; // if(!p_pgp_check_key(RemoteKey)) return 0; SAFE_FREE(p->pgpKey); p->pgpKey = (PBYTE) strdup(RemoteKey); return 1; }
int __cdecl cpp_decrypt_file(HANDLE context, LPCSTR file_in, LPCSTR file_out) { pCNTX ptr = get_context_on_id(context); if (!ptr) return 0; cpp_alloc_pdata(ptr); pSIMDATA p = (pSIMDATA)ptr->pdata; if (!p->KeyX) return 0; try { CBC_Mode<AES>::Decryption dec(p->KeyX, Tiger::DIGESTSIZE, IV); FileSource *f = new FileSource(file_in, true, new StreamTransformationFilter(dec, new FileSink(file_out))); delete f; } catch (...) { return 0; } return 1; }
// create pre-shared key from password int __cdecl cpp_init_keyp(HANDLE context, LPCSTR password) { pCNTX ptr = get_context_on_id(context); if(!ptr) return 0; pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr); BYTE buffer[Tiger::DIGESTSIZE]; // buffer for hash memset(buffer,0,sizeof(buffer)); // calculate hash Tiger().CalculateDigest(buffer,(PBYTE)password,strlen(password)); // store pre-shared key SAFE_FREE(p->KeyP); p->KeyP = (PBYTE) malloc(Tiger::DIGESTSIZE); memcpy(p->KeyP,buffer,Tiger::DIGESTSIZE); return 1; }
// generate KeyA pair, return public key as ASCII LPSTR __cdecl cpp_init_keya(HANDLE context, int features) { pCNTX ptr = get_context_on_id(context); if(!ptr) return NULL; pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr); int send_features = FEATURES; if(p->KeyP) send_features |= FEATURES_PSK; SAFE_DELETE(p->dh); if(features & FEATURES_NEWPG) { Integer p0("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nteger q0("0xF1515160E1BFC7636338C13AD5BA775318E287147A1F96B73CF0FB4D97EFFB9D1FCDCF31AB9D92C4F49C9F8D50F06E697D2313E2EBAC7781312A51F458D66FFC687960CAA86BDF150A36ED53D79FBDB4F501FD25E37C181B45F9555D7F1C6124CAB29A822AD1E7BF5DA93C2FDB12A61919B5E5359793CBB16E71516919040A7F"); Integer g0("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p->dh = new DH(p0,q0,g0); } else { Integer p0("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nteger g0("0x12A567BC9ABCDEF1234567823BCDEF1E"); p->dh = new DH(p0,g0); } BYTE priv1[KEYSIZE]; // private key of 2048 bit BYTE publ1[KEYSIZE+2]; // public key of 2048 bit + faetures field memset(priv1,0,sizeof(priv1)); memset(publ1,0,sizeof(publ1)); AutoSeededRandomPool autorng; p->dh->GenerateKeyPair(autorng, priv1, publ1); SAFE_FREE(p->PubA); p->PubA = (PBYTE) malloc(KEYSIZE); memcpy(p->PubA,publ1,KEYSIZE); SAFE_FREE(p->KeyA); p->KeyA = (PBYTE) malloc(KEYSIZE); memcpy(p->KeyA,priv1,KEYSIZE); if(p->KeyP) { // encrypt PUBLIC use PSK string ciphered; CFB_Mode<AES>::Encryption enc(p->KeyP,Tiger::DIGESTSIZE,IV); StreamTransformationFilter cbcEncryptor(enc,new StringSink(ciphered)); cbcEncryptor.Put(publ1,KEYSIZE); cbcEncryptor.MessageEnd(); memcpy(publ1,ciphered.data(),ciphered.length()); #if defined(_DEBUG) || defined(NETLIB_LOG) Sent_NetLog("cpp_init_keya: %d %d",KEYSIZE,ciphered.length()); #endif } memcpy((PVOID)&publ1[KEYSIZE],(PVOID)&send_features,2); SAFE_FREE(ptr->tmp); if(ptr->mode & MODE_BASE64 || features & FEATURES_NEWPG) ptr->tmp = base64encode((LPSTR)&publ1,KEYSIZE+2); else ptr->tmp = base16encode((LPSTR)&publ1,KEYSIZE+2); return ptr->tmp; }
// store KeyB int __cdecl cpp_init_keyb(HANDLE context, LPCSTR key) { pCNTX ptr = get_context_on_id(context); if(!ptr) return 0; pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr); int clen = rtrim(key); ptr->features = 0; LPSTR pub_binary; if((clen==KEYSIZE*2) || (clen==(KEYSIZE+2)*2)) pub_binary = base16decode(key,&clen); else pub_binary = base64decode(key,&clen); if( !pub_binary || (clen!=KEYSIZE && clen!=KEYSIZE+2) ) { #if defined(_DEBUG) || defined(NETLIB_LOG) Sent_NetLog("cpp_init_keyb: error bad_keyb"); #endif ptr->error = ERROR_BAD_KEYB; SAFE_FREE(pub_binary); return 0; } if(clen==KEYSIZE+2) memcpy((PVOID)&ptr->features,(PVOID)(pub_binary+KEYSIZE),2); if(p->KeyP) { if(!(ptr->features & FEATURES_PSK)) { // if NO PSK on other side #if defined(_DEBUG) || defined(NETLIB_LOG) Sent_NetLog("cpp_init_keyb: error no_psk"); #endif ptr->error = ERROR_NO_PSK; return 0; } ptr->error = ERROR_BAD_PSK; try { // decrypt PUBLIC use PSK string unciphered; CFB_Mode<AES>::Decryption dec(p->KeyP,Tiger::DIGESTSIZE,IV); StreamTransformationFilter cbcDecryptor(dec,new StringSink(unciphered)); cbcDecryptor.Put((PBYTE)pub_binary,KEYSIZE); cbcDecryptor.MessageEnd(); memcpy(pub_binary,unciphered.data(),unciphered.length()); } catch (...) { #if defined(_DEBUG) || defined(NETLIB_LOG) Sent_NetLog("cpp_init_keyb: error bad_psk"); #endif return 0; } } SAFE_FREE(p->KeyB); p->KeyB = (PBYTE) pub_binary; if(p->PubA && memcmp(p->PubA,p->KeyB,KEYSIZE)==0) { #if defined(_DEBUG) || defined(NETLIB_LOG) Sent_NetLog("cpp_init_keyb: error bad_keyb keya==keyb"); #endif SAFE_FREE(p->KeyB); ptr->error = ERROR_BAD_KEYB; return 0; } ptr->error = ERROR_NONE; return 1; }