// This function will base64 ENCODE theData,
// and then Set() that as the string contents.
// Additionally it will pack and compress the data!
//
bool OTASCIIArmor::SetAndPackData(const OTData & theData, bool bLineBreaks/*=true*/)
{
char * pString = NULL;
Release();
if (theData.GetSize() < 1)
return true;
// --------------------------------------------------------
OTDB::OTPacker * pPacker = OTASCIIArmor::GetPacker(); // No need to check for failure, since this already ASSERTS. No need to cleanup either.
// Here I use the default storage context to create the object (the blob.)
// I also originally created OTASCIIArmor::GetPacker() using OTDB_DEFAULT_PACKER,
// so I know everything is compatible.
//
OTDB::Blob * pBlob = dynamic_cast<OTDB::Blob *>(OTDB::CreateObject(OTDB::STORED_OBJ_BLOB));
OT_ASSERT(NULL != pBlob); // Beyond this point, responsible to delete pBlob.
OTCleanup<OTDB::Blob> theBlobAngel(*pBlob); // make sure memory is cleaned up.
// ----------------------------
pBlob->m_memBuffer.assign(static_cast<const unsigned char *>(theData.GetPointer()),
static_cast<const unsigned char *>(theData.GetPointer())+theData.GetSize());
OTDB::PackedBuffer * pBuffer = pPacker->Pack(*pBlob); // Now we PACK our data before compressing/encoding it.
if (NULL == pBuffer)
{
OTLog::Error("Failed packing data in OTASCIIArmor::SetAndPackData. \n");
return false;
}
OTCleanup<OTDB::PackedBuffer> theBufferAngel(*pBuffer); // make sure memory is cleaned up.
// --------------------------------------------------------
const uint8_t* pUint = static_cast<const uint8_t*>(pBuffer->GetData());
const size_t theSize = pBuffer->GetSize();
if (NULL != pUint)
pString = OTCrypto::It()->Base64Encode(pUint, static_cast<int>(theSize), bLineBreaks);
// pString = OT_base64_encode(pUint, static_cast<int> (theSize), (bLineBreaks ? 1 : 0));
else
{
OTLog::Error("Error while base64_encoding in OTASCIIArmor::SetAndPackData.\n");
return false;
}
// -------------------------------------
if (NULL != pString)
{
Set(pString);
delete [] pString; pString=NULL;
return true;
}
else
{
OTLog::Error("Error while base64_encoding in OTASCIIArmor::SetAndPackData.\n");
return false;
}
}
void PaymentCode::ConstructKey(const OTData& pubkey, const OTData& chaincode)
{
proto::AsymmetricKey newKey;
newKey.set_version(1);
newKey.set_type(proto::AKEYTYPE_SECP256K1);
newKey.set_mode(proto::KEYMODE_PUBLIC);
newKey.set_role(proto::KEYROLE_SIGN);
newKey.set_key(pubkey.GetPointer(), pubkey.GetSize());
newKey.set_chaincode(chaincode.GetPointer(), chaincode.GetSize());
OTAsymmetricKey* key = OTAsymmetricKey::KeyFactory(newKey);
pubkey_.reset(key);
}
// This function will base64 ENCODE theData,
// and then Set() that as the string contents.
bool OTASCIIArmor::SetData(const OTData & theData, bool bLineBreaks/*=true*/)
{
return SetAndPackData(theData, bLineBreaks);
char * pString = NULL;
Release();
if (theData.GetSize() < 1)
return true;
pString = OT_base64_encode((const uint8_t*)theData.GetPointer(), theData.GetSize(), (bLineBreaks ? 1 : 0));
if (pString)
{
Set(pString);
delete [] pString; pString=NULL;
return true;
}
else
{
OTLog::Error("Error while base64_encoding in OTASCIIArmor::GetData.\n");
return false;
}
}
serializedAsymmetricKey TrezorCrypto::HDNodeToSerialized(
const HDNode& node,
const DerivationMode privateVersion) const
{
serializedAsymmetricKey key = std::make_shared<proto::AsymmetricKey>();
key->set_version(1);
key->set_type(proto::AKEYTYPE_SECP256K1);
if (privateVersion) {
key->set_mode(proto::KEYMODE_PRIVATE);
key->set_chaincode(node.chain_code, sizeof(node.chain_code));
OTPassword plaintextKey;
plaintextKey.setMemory(node.private_key, sizeof(node.private_key));
OTData encryptedKey;
BinarySecret masterPassword(
App::Me().Crypto().AES().InstantiateBinarySecretSP());
masterPassword = CryptoSymmetric::GetMasterKey("");
bool encrypted = Libsecp256k1::EncryptPrivateKey(
plaintextKey,
*masterPassword,
encryptedKey);
if (encrypted) {
key->set_key(encryptedKey.GetPointer(), encryptedKey.GetSize());
}
} else {
key->set_mode(proto::KEYMODE_PUBLIC);
key->set_key(node.public_key, sizeof(node.public_key));
}
return key;
}
PaymentCode::PaymentCode(const std::string& base58)
{
OTData rawCode;
App::Me().Crypto().Util().Base58CheckDecode(base58, rawCode);
if (81 == rawCode.GetSize()) {
uint8_t prependByte, features;
rawCode.OTfread(&prependByte, 1);
rawCode.OTfread(&version_, 1);
rawCode.OTfread(&features, 1);
if (features & 0x80) {
hasBitmessage_ = true;
}
OTData key;
key.SetSize(33);
chain_code_.SetSize(32);
OT_ASSERT(33 == key.GetSize());
OT_ASSERT(32 == chain_code_.GetSize());
rawCode.OTfread(static_cast<uint8_t*>(const_cast<void*>(key.GetPointer())), key.GetSize());
rawCode.OTfread(static_cast<uint8_t*>(const_cast<void*>(chain_code_.GetPointer())), chain_code_.GetSize());
ConstructKey(key, chain_code_);
if (hasBitmessage_) {
rawCode.OTfread(&bitmessage_version_, 1);
rawCode.OTfread(&bitmessage_stream_, 1);
}
}
}
const Identifier PaymentCode::ID() const
{
uint8_t core[65]{};
OTData pubkey = Pubkey();
OTPassword::safe_memcpy(
&core[0],
33,
pubkey.GetPointer(),
pubkey.GetSize(),
false);
if (chain_code_.GetSize() == 32) {
OTPassword::safe_memcpy(
&core[33],
32,
chain_code_.GetPointer(),
chain_code_.GetSize(),
false);
}
OTData dataVersion(core, sizeof(core));
Identifier paymentCodeID;
paymentCodeID.CalculateDigest(dataVersion);
return paymentCodeID;
}
const std::string PaymentCode::asBase58() const
{
OTData pubkey = Pubkey();
uint8_t serialized[81]{};
serialized[0] = PaymentCode::BIP47_VERSION_BYTE;
serialized[1] = version_;
serialized[2] = hasBitmessage_ ? 0x80 : 0;
OTPassword::safe_memcpy(
&serialized[3],
33,
pubkey.GetPointer(),
pubkey.GetSize(),
false);
OTPassword::safe_memcpy(
&serialized[36],
32,
chain_code_.GetPointer(),
chain_code_.GetSize(),
false);
serialized[68] = bitmessage_version_;
serialized[69] = bitmessage_stream_;
OTData binaryVersion(serialized, sizeof(serialized));
return App::Me().Crypto().Util().Base58CheckEncode(binaryVersion).Get();
}
int32_t OTPassword::setMemory(const OTData& data)
{
const uint32_t dataSize = data.GetSize();
uint32_t returnedSize = dataSize;
bool memorySet = setMemory(data.GetPointer(), returnedSize);
// TODO maybe we should check for truncation?
return memorySet;
}
SerializedPaymentCode PaymentCode::Serialize() const
{
SerializedPaymentCode serialized = std::make_shared<proto::PaymentCode>();
serialized->set_version(version_);
if (pubkey_) {
OTData pubkey = Pubkey();
serialized->set_key(pubkey.GetPointer(), pubkey.GetSize());
}
serialized->set_chaincode(chain_code_.GetPointer(), chain_code_.GetSize());
serialized->set_bitmessageversion(bitmessage_version_);
serialized->set_bitmessagestream(bitmessage_stream_);
return serialized;
}
// Base64-encode
bool OTASCIIArmor::SetData(const OTData& theData, bool bLineBreaks)
{
Release();
if (theData.GetSize() < 1) return true;
char* pString = App::Me().Crypto().Util().Base64Encode(
static_cast<const uint8_t*>(theData.GetPointer()), theData.GetSize(),
bLineBreaks);
if (!pString) {
otErr << __FUNCTION__ << "Base64Encode fail\n";
return false;
}
Set(pString);
delete[] pString;
return true;
}
bool Identifier::CalculateDigest(const OTData& dataInput)
{
auto dataPtr = static_cast<const unsigned char*>(dataInput.GetPointer());
return CalculateDigest(dataPtr, dataInput.GetSize());
}
bool OTEnvelope::Decrypt(String& theOutput, const OTSymmetricKey& theKey,
const OTPassword& thePassword)
{
const char* szFunc = "OTEnvelope::Decrypt";
OT_ASSERT(
(thePassword.isPassword() && (thePassword.getPasswordSize() > 0)) ||
(thePassword.isMemory() && (thePassword.getMemorySize() > 0)));
OT_ASSERT(theKey.IsGenerated());
OTPassword theRawSymmetricKey;
if (false ==
theKey.GetRawKeyFromPassphrase(thePassword, theRawSymmetricKey)) {
otErr << szFunc << ": Failed trying to retrieve raw symmetric key "
"using password. (Wrong password?)\n";
return false;
}
uint32_t nRead = 0;
uint32_t nRunningTotal = 0;
m_dataContents.reset(); // Reset the fread position on this object to 0.
//
// Read the ENVELOPE TYPE (as network order version -- and convert to host
// version.)
//
// 0 == Error
// 1 == Asymmetric Key (this function -- Seal / Open)
// 2 == Symmetric Key (other functions -- Encrypt / Decrypt use this.)
// Anything else: error.
//
uint16_t env_type_n = 0;
if (0 == (nRead = m_dataContents.OTfread(
reinterpret_cast<uint8_t*>(&env_type_n),
static_cast<uint32_t>(sizeof(env_type_n))))) {
otErr << szFunc << ": Error reading Envelope Type. Expected "
"asymmetric(1) or symmetric (2).\n";
return false;
}
nRunningTotal += nRead;
OT_ASSERT(nRead == static_cast<uint32_t>(sizeof(env_type_n)));
// convert that envelope type from network to HOST endian.
//
const uint16_t env_type = ntohs(env_type_n);
// nRunningTotal += env_type; // NOPE! Just because envelope type is 1
// or 2, doesn't mean we add 1 or 2 extra bytes to the length here. Nope!
if (2 != env_type) {
const uint32_t l_env_type = static_cast<uint32_t>(env_type);
otErr << szFunc << ": Error: Expected Envelope for Symmetric key (type "
"2) but instead found type: " << l_env_type << ".\n";
return false;
}
// Read network-order IV size (and convert to host version)
//
const uint32_t max_iv_length =
OTCryptoConfig::SymmetricIvSize(); // I believe this is a max length, so
// it may not match the actual length
// of the IV.
// Read the IV SIZE (network order version -- convert to host version.)
//
uint32_t iv_size_n = 0;
if (0 == (nRead = m_dataContents.OTfread(
reinterpret_cast<uint8_t*>(&iv_size_n),
static_cast<uint32_t>(sizeof(iv_size_n))))) {
otErr << szFunc << ": Error reading IV Size.\n";
return false;
}
nRunningTotal += nRead;
OT_ASSERT(nRead == static_cast<uint32_t>(sizeof(iv_size_n)));
// convert that iv size from network to HOST endian.
//
const uint32_t iv_size_host_order = ntohl(iv_size_n);
if (iv_size_host_order > max_iv_length) {
otErr << szFunc << ": Error: iv_size ("
<< static_cast<int64_t>(iv_size_host_order)
<< ") is larger than max_iv_length ("
<< static_cast<int64_t>(max_iv_length) << ").\n";
return false;
}
// nRunningTotal += iv_size_host_order; // Nope!
// Then read the IV (initialization vector) itself.
//
OTData theIV;
theIV.SetSize(iv_size_host_order);
if (0 == (nRead = m_dataContents.OTfread(
static_cast<uint8_t*>(const_cast<void*>(theIV.GetPointer())),
static_cast<uint32_t>(iv_size_host_order)))) {
otErr << szFunc << ": Error reading initialization vector.\n";
return false;
}
nRunningTotal += nRead;
OT_ASSERT(nRead == static_cast<uint32_t>(iv_size_host_order));
OT_ASSERT(nRead <= max_iv_length);
// We create an OTData object to store the ciphertext itself, which
// begins AFTER the end of the IV.
// So we see pointer + nRunningTotal as the starting point for the
// ciphertext.
// the size of the ciphertext, meanwhile, is the size of the entire thing,
// MINUS nRunningTotal.
//
OTData theCipherText(
static_cast<const void*>(
static_cast<const uint8_t*>(m_dataContents.GetPointer()) +
nRunningTotal),
m_dataContents.GetSize() - nRunningTotal);
// Now we've got all the pieces together, let's try to decrypt it...
//
OTData thePlaintext; // for output.
const bool bDecrypted = OTCrypto::It()->Decrypt(
theRawSymmetricKey, // The symmetric key, in clear form.
static_cast<const char*>(
theCipherText.GetPointer()), // This is the Ciphertext.
theCipherText.GetSize(),
theIV, thePlaintext); // OUTPUT. (Recovered plaintext.) You can pass
// OTPassword& OR OTData& here (either will
// work.)
// theOutput is where we'll put the decrypted data.
//
theOutput.Release();
if (bDecrypted) {
// Make sure it's null-terminated...
//
uint32_t nIndex = thePlaintext.GetSize() - 1;
(static_cast<uint8_t*>(
const_cast<void*>(thePlaintext.GetPointer())))[nIndex] = '\0';
// Set it into theOutput (to return the plaintext to the caller)
//
theOutput.Set(static_cast<const char*>(thePlaintext.GetPointer()));
}
return bDecrypted;
}
bool OTEnvelope::Encrypt(const String& theInput, OTSymmetricKey& theKey,
const OTPassword& thePassword)
{
OT_ASSERT(
(thePassword.isPassword() && (thePassword.getPasswordSize() > 0)) ||
(thePassword.isMemory() && (thePassword.getMemorySize() > 0)));
OT_ASSERT(theInput.Exists());
// Generate a random initialization vector.
//
OTData theIV;
if (!theIV.Randomize(OTCryptoConfig::SymmetricIvSize())) {
otErr << __FUNCTION__ << ": Failed trying to randomly generate IV.\n";
return false;
}
// If the symmetric key hasn't already been generated, we'll just do that
// now...
// (The passphrase is used to derive another key that is used to encrypt the
// actual symmetric key, and to access it later.)
//
if ((false == theKey.IsGenerated()) &&
(false == theKey.GenerateKey(thePassword))) {
otErr << __FUNCTION__
<< ": Failed trying to generate symmetric key using password.\n";
return false;
}
if (!theKey.HasHashCheck()) {
if (!theKey.GenerateHashCheck(thePassword)) {
otErr << __FUNCTION__
<< ": Failed trying to generate hash check using password.\n";
return false;
}
}
OT_ASSERT(theKey.HasHashCheck());
OTPassword theRawSymmetricKey;
if (false ==
theKey.GetRawKeyFromPassphrase(thePassword, theRawSymmetricKey)) {
otErr << __FUNCTION__ << ": Failed trying to retrieve raw symmetric "
"key using password.\n";
return false;
}
OTData theCipherText;
const bool bEncrypted = OTCrypto::It()->Encrypt(
theRawSymmetricKey, // The symmetric key, in clear form.
theInput.Get(), // This is the Plaintext.
theInput.GetLength() + 1, // for null terminator
theIV, // Initialization vector.
theCipherText); // OUTPUT. (Ciphertext.)
//
// Success?
//
if (!bEncrypted) {
otErr << __FUNCTION__ << ": (static) call failed to encrypt. Wrong "
"key? (Returning false.)\n";
return false;
}
// This is where the envelope final contents will be placed,
// including the envelope type, the size of the IV, the IV
// itself, and the ciphertext.
//
m_dataContents.Release();
// Write the ENVELOPE TYPE (network order version.)
//
// 0 == Error
// 1 == Asymmetric Key (other functions -- Seal / Open.)
// 2 == Symmetric Key (this function -- Encrypt / Decrypt.)
// Anything else: error.
// Calculate "network-order" version of envelope type 2.
uint16_t env_type_n = htons(static_cast<uint16_t>(2));
m_dataContents.Concatenate(reinterpret_cast<void*>(&env_type_n),
// (uint32_t here is the 2nd parameter to
// Concatenate, and has nothing to do with
// env_type_n being uint16_t)
static_cast<uint32_t>(sizeof(env_type_n)));
// Write IV size (in network-order)
//
uint32_t ivlen =
OTCryptoConfig::SymmetricIvSize(); // Length of IV for this cipher...
OT_ASSERT(ivlen >= theIV.GetSize());
uint32_t ivlen_n = htonl(
theIV.GetSize()); // Calculate "network-order" version of iv length.
m_dataContents.Concatenate(reinterpret_cast<void*>(&ivlen_n),
static_cast<uint32_t>(sizeof(ivlen_n)));
// Write the IV itself.
//
m_dataContents.Concatenate(theIV.GetPointer(), theIV.GetSize());
// Write the Ciphertext.
//
m_dataContents.Concatenate(theCipherText.GetPointer(),
theCipherText.GetSize());
// We don't write the size of the ciphertext before the ciphertext itself,
// since the decryption is able to deduce the size based on the total
// envelope
// size minus the other pieces. We might still want to add that size here,
// however.
// (for security / safety reasons.)
return true;
}
bool OTEnvelope::Open(const OTPseudonym & theRecipient, OTString & theContents)
{
bool retval = false;
EVP_CIPHER_CTX ctx;
unsigned char buffer[4096];
unsigned char buffer_out[4096 + EVP_MAX_IV_LENGTH];
unsigned char iv[EVP_MAX_IV_LENGTH];
size_t len = 0;
int len_out = 0;
unsigned char * ek = NULL;
int eklen = 0;
uint32_t eklen_n = 0;
memset(buffer, 0, 4096);
memset(buffer_out, 0, 4096 + EVP_MAX_IV_LENGTH);
memset(iv, 0, EVP_MAX_IV_LENGTH);
OTAsymmetricKey & privateKey = (OTAsymmetricKey &)theRecipient.GetPrivateKey();
EVP_PKEY * pkey = (EVP_PKEY *)privateKey.GetKey();
if (NULL == pkey)
{
OTLog::Error("Null private key in OTEnvelope::Open\n");
return false;
}
EVP_CIPHER_CTX_init(&ctx);
ek = (unsigned char*)malloc(EVP_PKEY_size(pkey)); // I assume this is for the AES key
OT_ASSERT(NULL != ek);
memset(ek, 0, EVP_PKEY_size(pkey));
eklen = EVP_PKEY_size(pkey);
//int EVP_OpenInit(EVP_CIPHER_CTX *ctx,
//EVP_CIPHER *type,
//unsigned char *ek,
//int ekl,
//unsigned char *iv,
//EVP_PKEY *priv);
//EVP_OpenInit() initializes a cipher context ctx for decryption with cipher type. It decrypts the encrypted
// symmetric key of length ekl bytes passed in the ek parameter using the private key priv. The IV is supplied
// in the iv parameter.
theContents.Release(); // This is where we'll put the decrypted data.
m_dataContents.reset(); // reset the fread position on this object.
int nReadLength = 0;
int nReadKey = 0;
int nReadIV = 0;
// First we read the encrypted key size.
if (0 == (nReadLength = m_dataContents.OTfread((char*)&eklen_n, sizeof(eklen_n))))
{
OTLog::Error("Error reading encrypted key size in OTEnvelope::Open\n");
free(ek); ek = NULL;
return false;
}
// convert it from network to host endian.
eklen = ntohl(eklen_n);
// Next we read the encrypted key itself.
if (0 == (nReadKey = m_dataContents.OTfread((char*)ek, eklen)))
{
OTLog::Error("Error reading encrypted key size in OTEnvelope::Open\n");
free(ek); ek = NULL;
return false;
}
// Next we read the initialization vector.
if (0 == (nReadIV = m_dataContents.OTfread((char*)iv, EVP_CIPHER_iv_length(EVP_aes_128_cbc()))))
{
OTLog::Error("Error reading initialization vector in OTEnvelope::Open\n");
free(ek); ek = NULL;
return false;
}
OTData ciphertext((const void*)((unsigned char *)m_dataContents.GetPointer() + nReadLength + nReadKey + nReadIV),
m_dataContents.GetSize() - nReadLength - nReadKey - nReadIV);
// Now we process ciphertext and write the decrypted data to plaintext.
OTData plaintext;
if (!EVP_OpenInit(&ctx, EVP_aes_128_cbc(), ek, eklen, iv, pkey))
{
OTLog::Error("EVP_OpenInit: failed.\n");
free(ek); ek = NULL;
return false;
}
while ((len = ciphertext.OTfread((char*)buffer, sizeof(buffer))) > 0)
{
if (!EVP_OpenUpdate(&ctx, buffer_out, &len_out, buffer, len))
{
OTLog::Error("EVP_OpenUpdate: failed.\n");
free(ek); ek = NULL;
return false;
}
OTData dataOpenUpdate(buffer_out, len_out);
plaintext += dataOpenUpdate;
}
if (!EVP_OpenFinal(&ctx, buffer_out, &len_out))
{
OTLog::Error("EVP_OpenFinal: failed.\n");
free(ek); ek = NULL;
return false;
}
OTData dataOpenFinal(buffer_out, len_out);
plaintext += dataOpenFinal;
// Make sure it's null terminated
int nIndex = plaintext.GetSize()-1;
((unsigned char*)plaintext.GetPointer())[nIndex] = 0;
// Set it into theContents (to return the plaintext to the caller)
theContents.Set((const char *)plaintext.GetPointer());
retval = true;
free(ek); ek = NULL;
return retval;
}