我在“OpenSSL”和“Windows CryptoAPI”之间交换公钥时遇到问题。公钥以pem格式从OpenSSL导出。我的程序是用c ++编写的。我获取公钥并通过“CryptoAPI”加载它。加载公钥后,我加密了一些数据并将它们发送到另一个应用程序。另一个应用程序无法通过自己的私钥解密接收的数据。请帮我找到解决方案。
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDcJXxao6OzesjaM5VnsYTnHWUN
z8dosWEETARH6NOqq+hAoMscsv+2MgT0oOYKLf/c8i37YFXnswEan78QnWYO3jtX
UHfJgXcLcMz7o3lX3OwNqRXgXW6Db95EjPEnLuPCJ2Pafu9E75ZMglkgw9MrIAik
XKL9u2dc9fkbc7FptQIDAQAB
-----END PUBLIC KEY-----
源代码:
_ServerContextHandle = NULL;
_EncryptionKeyHandle = NULL;
void Initialize(char* inPublicKeyByPemFormat)
{
HCRYPTPROV serverContextHandle;
bool result = CryptAcquireContextW(&serverContextHandle, nullptr, nullptr, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT) == TRUE;
if (result)
{
_ServerContextHandle = serverContextHandle;
byte derPublicKey[2048];
DWORD derPublicKeyLength = 2048;
result = CryptStringToBinaryA(inPublicKeyByPemFormat, 0, CRYPT_STRING_BASE64HEADER, derPublicKey, &derPublicKeyLength, nullptr, nullptr) == TRUE;
CERT_PUBLIC_KEY_INFO* publicKeyInfo = nullptr;
DWORD publicKeyInfoLength;
if(result)
{
result = CryptDecodeObjectEx(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, X509_PUBLIC_KEY_INFO, derPublicKey, derPublicKeyLength, CRYPT_ENCODE_ALLOC_FLAG, nullptr, &publicKeyInfo, &publicKeyInfoLength) == TRUE;
}
HCRYPTKEY encryptionKeyHandle;
if(result)
{
result = CryptImportPublicKeyInfo(_ServerContextHandle, X509_ASN_ENCODING, publicKeyInfo, &encryptionKeyHandle) == TRUE;
}
LocalFree(publicKeyInfo);
if (result)
{
_EncryptionKeyHandle = encryptionKeyHandle;
}
}
}
byte* EncryptData(byte* inData, DWORD inDataLength, DWORD* outLength) const
{
byte* result = nullptr;
*outLength = 0;
DWORD length = inDataLength;
result = CloneByteArray(inData, inDataLength);
if (!CryptEncrypt(_EncryptionKeyHandle, NULL, TRUE, 0, result, &length, length))
{
delet result;
result = new byte[length];
CopyByteArray(inData, result, inDataLength);
*outLength = inDataLength;
if (!CryptEncrypt(_EncryptionKeyHandle, NULL, TRUE, 0, result, outLength, length))
{
delete result;
result = nullptr;
*outLength = 0;
}
}
else
{
*outLength = length;
}
return result;
}
答案 0 :(得分:0)
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,由于当时可能对作者有意义的原因,将字节向下写入。或者,它以字节小/小端顺序写入它们,而几乎所有其他加密库(包括Windows CNG CryptEncrypt
和BCryptEncrypt
例程)以字节主/大端顺序写入它们。
因此,您需要撤消来自NCryptEncrypt
的数据,并将其反转到CryptEncrypt
。
例如,在.NET Core的RSACryptoServiceProvider.Encrypt中,它调用CapiHelper.EncryptKey,然后在返回之前调用CryptDecrypt
然后调用CryptEncrypt
。
CryptEncrypt documentation作为备注部分的最后一句
密文以little-endian格式返回。