C# RSA equivalent code to the C++ Crypto API

Question

DWORD nSize;
LPBYTE lpData;
HCRYPTKEY hPublicKey;


nSize = ReadFromFile(lpszUserPublicKey, NULL);

if(nSize == -1)
 return FALSE;

lpData = new BYTE[nSize];

ReadFromFile(lpszUserPublicKey, lpData);

if(!CryptImportKey(hProv, lpData, nSize, NULL, 0, &hPublicKey)) {
 delete lpData;
 return FALSE;
}

Erase(lpData, nSize);

// Get the data size(&nSize)
if(!CryptExportKey(hKey, hPublicKey, SIMPLEBLOB, 0, NULL, &nSize))
 return FALSE;

lpData = new BYTE[nSize];

CryptExportKey(hKey, hPublicKey, SIMPLEBLOB, 0, lpData, &nSize);

if(WriteToFile(lpszLicenseFile, lpData, nSize) == -1) {
 delete lpData;
 return FALSE;
}

delete lpData;

return CryptDestroyKey(hPublicKey);

How would the above code be written in C#. I am particularily interested in the Crypto API calls. Note, the encryption method that is used is RSA

Answer 1

This codeproject article seems it fits your needs. As shown in the article, C# has a RSACryptoServiceProvider Class in System.Security.Cryptography to make things a little easier so you don't have to roll an entire solution and translate all of that code manually.