ECIES 有几种不同的加密方法,具体取决于所使用的标准。目前,Crypto++ 仅实现 P1363 XOR 方法(以下来自gfpcrypt.h)。这可能解释了大部分例外情况。
为了解决问题,我相信你有三个选择。首先,您可以使用 XOR 方法,因为 Bouncy Castle 和 Crypto++ 都有它。
其次,您也许可以使用Jack Lloyd's Botan。Botan 和 Crypto++ 都试图与 Bouncy Castle 结盟以促进互操作,但 Botan 有更多的加密方法。
第三,Crypto++需要添加另一种兼容Bouncy Castle的加密方式。我想它会被称为DL_EncryptionAlgorithm_AES_CBC
. 我None
不确定AES-CBC/NONE/PKCS7Padding
.
Crypto++ 很乐意添加DL_EncryptionAlgorithm_AES_CBC
. 要添加它,我需要与具有 Java/BC 经验的人一起工作。如果您有兴趣,请与我联系noloader,gmail 帐户。
关于“Botan 和 Crypto++ 试图与 Bouncy Castle 结盟以促进互操作” ......对于用户来说,事情是一团糟。Martínez、Encinas 和 Ávila 在椭圆曲线综合加密方案调查中的注释:
... 就特定操作以及允许的功能和算法列表而言,不可能实现与所有这些标准兼容的软件版本。
我可以指出无数互操作问题的例子,从你的问题到比特币和 Zcash 由于太多不兼容的选择而标准化其协议的问题。它会一直持续下去。
这些注释来自gfpcrypt.h,可在 ECIES 的Crypto++ 手册中找到:
//! \class DL_EncryptionAlgorithm_Xor
//! \brief P1363 based XOR Encryption Method
//! \tparam MAC MessageAuthenticationCode derived class used for MAC computation
//! \tparam DHAES_MODE flag indicating DHAES mode
//! \tparam LABEL_OCTETS flag indicating the label is octet count
//! \details DL_EncryptionAlgorithm_Xor is based on an early P1363 draft, which itself appears to be based on an
//! early Certicom SEC-1 draft (or an early SEC-1 draft was based on a P1363 draft). Crypto++ 4.2 used it in its Integrated
//! Ecryption Schemes with <tt>NoCofactorMultiplication</tt>, <tt>DHAES_MODE=false</tt> and <tt>LABEL_OCTETS=true</tt>.
//! \details If you need this method for Crypto++ 4.2 compatibility, then use the ECIES template class with
//! <tt>NoCofactorMultiplication</tt>, <tt>DHAES_MODE=false</tt> and <tt>LABEL_OCTETS=true</tt>.
//! \details If you need this method for Bouncy Castle 1.54 and Botan 1.11 compatibility, then use the ECIES template class with
//! <tt>NoCofactorMultiplication</tt>, <tt>DHAES_MODE=ture</tt> and <tt>LABEL_OCTETS=false</tt>.
//! \details Bouncy Castle 1.54 and Botan 1.11 compatibility are the default template parameters.
//! \since Crypto++ 4.0
template <class MAC, bool DHAES_MODE, bool LABEL_OCTETS=false>
class DL_EncryptionAlgorithm_Xor : public DL_SymmetricEncryptionAlgorithm
{
public:
bool ParameterSupported(const char *name) const {return strcmp(name, Name::EncodingParameters()) == 0;}
size_t GetSymmetricKeyLength(size_t plaintextLength) const
{return plaintextLength + static_cast<size_t>(MAC::DIGESTSIZE);}
size_t GetSymmetricCiphertextLength(size_t plaintextLength) const
{return plaintextLength + static_cast<size_t>(MAC::DIGESTSIZE);}
size_t GetMaxSymmetricPlaintextLength(size_t ciphertextLength) const
{return SaturatingSubtract(ciphertextLength, static_cast<size_t>(MAC::DIGESTSIZE));}
void SymmetricEncrypt(RandomNumberGenerator &rng, const byte *key, const byte *plaintext, size_t plaintextLength, byte *ciphertext, const NameValuePairs ¶meters) const
{
CRYPTOPP_UNUSED(rng);
const byte *cipherKey = NULL, *macKey = NULL;
if (DHAES_MODE)
{
macKey = key;
cipherKey = key + MAC::DEFAULT_KEYLENGTH;
}
else
{
cipherKey = key;
macKey = key + plaintextLength;
}
ConstByteArrayParameter encodingParameters;
parameters.GetValue(Name::EncodingParameters(), encodingParameters);
if (plaintextLength) // Coverity finding
xorbuf(ciphertext, plaintext, cipherKey, plaintextLength);
MAC mac(macKey);
mac.Update(ciphertext, plaintextLength);
mac.Update(encodingParameters.begin(), encodingParameters.size());
if (DHAES_MODE)
{
byte L[8];
PutWord(false, BIG_ENDIAN_ORDER, L, (LABEL_OCTETS ? word64(encodingParameters.size()) : 8 * word64(encodingParameters.size())));
mac.Update(L, 8);
}
mac.Final(ciphertext + plaintextLength);
}
DecodingResult SymmetricDecrypt(const byte *key, const byte *ciphertext, size_t ciphertextLength, byte *plaintext, const NameValuePairs ¶meters) const
{
size_t plaintextLength = GetMaxSymmetricPlaintextLength(ciphertextLength);
const byte *cipherKey, *macKey;
if (DHAES_MODE)
{
macKey = key;
cipherKey = key + MAC::DEFAULT_KEYLENGTH;
}
else
{
cipherKey = key;
macKey = key + plaintextLength;
}
ConstByteArrayParameter encodingParameters;
parameters.GetValue(Name::EncodingParameters(), encodingParameters);
MAC mac(macKey);
mac.Update(ciphertext, plaintextLength);
mac.Update(encodingParameters.begin(), encodingParameters.size());
if (DHAES_MODE)
{
byte L[8];
PutWord(false, BIG_ENDIAN_ORDER, L, (LABEL_OCTETS ? word64(encodingParameters.size()) : 8 * word64(encodingParameters.size())));
mac.Update(L, 8);
}
if (!mac.Verify(ciphertext + plaintextLength))
return DecodingResult();
if (plaintextLength) // Coverity finding
xorbuf(plaintext, ciphertext, cipherKey, plaintextLength);
return DecodingResult(plaintextLength);
}
};