/* * Default_ELG_Op Constructor */ Default_ELG_Op::Default_ELG_Op(const DL_Group& group, const BigInt& y, const BigInt& x) : p(group.get_p()) { powermod_g_p = Fixed_Base_Power_Mod(group.get_g(), p); powermod_y_p = Fixed_Base_Power_Mod(y, p); mod_p = Modular_Reducer(p); if(x != 0) powermod_x_p = Fixed_Exponent_Power_Mod(x, p); }
bool ne7ssh_keys::generateDSAKeys (const char* fqdn, const char* privKeyFileName, const char* pubKeyFileName, uint16 keySize) { DER_Encoder encoder; BigInt p, q, g, y, x; ne7ssh_string pubKeyBlob; FILE *privKeyFile, *pubKeyFile; std::string privKeyEncoded; if (keySize != 1024) { ne7ssh::errors()->push (-1, "DSA keys must be 1024 bits."); return false; } #if BOTAN_PRE_18 || BOTAN_PRE_15 DL_Group dsaGroup (keySize, DL_Group::DSA_Kosherizer); DSA_PrivateKey privDsaKey (dsaGroup); #else DL_Group dsaGroup (*ne7ssh::rng, Botan::DL_Group::DSA_Kosherizer, keySize); DSA_PrivateKey privDsaKey (*ne7ssh::rng, dsaGroup); #endif DSA_PublicKey pubDsaKey = privDsaKey; p = dsaGroup.get_p(); q = dsaGroup.get_q(); g = dsaGroup.get_g(); y = pubDsaKey.get_y(); x = privDsaKey.get_x(); pubKeyBlob.addString ("ssh-dss"); pubKeyBlob.addBigInt (p); pubKeyBlob.addBigInt (q); pubKeyBlob.addBigInt (g); pubKeyBlob.addBigInt (y); Pipe base64it (new Base64_Encoder); base64it.process_msg(pubKeyBlob.value()); SecureVector<Botan::byte> pubKeyBase64 = base64it.read_all (PIPE_DEFAULT_MESSAGE); pubKeyFile = fopen (pubKeyFileName, "w"); if (!pubKeyFile) { ne7ssh::errors()->push (-1, "Cannot open file where public key is stored. Filename: %s", pubKeyFileName); return false; } if ((!fwrite ("ssh-dss ", 8, 1, pubKeyFile)) || (!fwrite (pubKeyBase64.begin(), (size_t) pubKeyBase64.size(), 1, pubKeyFile)) || (!fwrite (" ", 1, 1, pubKeyFile)) || (!fwrite (fqdn, strlen(fqdn), 1, pubKeyFile)) || (!fwrite ("\n", 1, 1, pubKeyFile))) { ne7ssh::errors()->push (-1, "I/O error while writting to file: %s.", pubKeyFileName); return false; } fclose (pubKeyFile); #if BOTAN_PRE_15 encoder.start_sequence(); DER::encode (encoder, 0U); DER::encode (encoder, p); DER::encode (encoder, q); DER::encode (encoder, g); DER::encode (encoder, y); DER::encode (encoder, x); encoder.end_sequence(); #else encoder.start_cons(SEQUENCE) .encode (0U) .encode (p) .encode (q) .encode (g) .encode (y) .encode (x) .end_cons(); #endif privKeyEncoded = PEM_Code::encode (encoder.get_contents(), "DSA PRIVATE KEY"); privKeyFile = fopen (privKeyFileName, "w"); if (!privKeyFile) { ne7ssh::errors()->push (-1, "Cannot open file where private key is stored. Filename: %s", privKeyFileName); return false; } if (!fwrite (privKeyEncoded.c_str(), (size_t) privKeyEncoded.length(), 1, privKeyFile)) { ne7ssh::errors()->push (-1, "I/O error while writting to file: %s.", privKeyFileName); return false; } fclose (privKeyFile); // delete dsaGroup; return true; }