public AsymmetricEncryption()
{
HA = GetHashAlgorithm();
RSACSP = GetRSACryptoServiceProvider();
DecryptCount = RSACSP.KeySize / 8;
EncryptCount = DecryptCount - 11;
PublicKeyBase64String = RSACSP.ExportCspBlob(false).ToBase64String();
}
public AsymmetricEncryption(byte[] publicKeyBlob, byte[] privateKeyBlob)
{
HA = GetHashAlgorithm();
RSACSP = GetRSACryptoServiceProvider();
RSACSP.ImportCspBlob(publicKeyBlob);
RSACSP.ImportCspBlob(privateKeyBlob);
DecryptCount = RSACSP.KeySize / 8;
EncryptCount = DecryptCount - 11;
PublicKeyBase64String = publicKeyBlob.ToBase64String();
}
/// <summary>
/// 使用RSA进行非对称解密，使用默认私钥
/// </summary>
/// <param name="inputBuffer">待解密的字节数组</param>
/// <returns>解密后的字节数组</returns>
public byte[] Decrypt(byte[] inputBuffer)
{
if (inputBuffer.Length <= DecryptCount)
{
return(RSACSP.Decrypt(inputBuffer, false));
}
else
{
List <byte> list = new List <byte>();
MemoryStream ms = new MemoryStream(inputBuffer);
byte[] buffer = new byte[EncryptCount];
while (ms.Read(buffer, 0, EncryptCount) > 0)
{
list.AddRange(RSACSP.Decrypt(buffer, false));
}
return(list.ToArray());
}
}
/// <summary>
/// 使用RSA进行非对称加密
/// </summary>
/// <param name="inputBuffer">待加密的字节数组</param>
/// <param name="keyBlob">RSA公钥Blob字节数组</param>
/// <returns>加密后的字节数组</returns>
public byte[] Encrypt(byte[] inputBuffer, byte[] keyBlob)
{
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
RSA.ImportCspBlob(keyBlob);
if (inputBuffer.Length <= EncryptCount)
{
return(RSA.Encrypt(inputBuffer, false));
}
else
{
List <byte> list = new List <byte>();
MemoryStream ms = new MemoryStream(inputBuffer);
byte[] buffer = new byte[EncryptCount];
while (ms.Read(buffer, 0, EncryptCount) > 0)
{
list.AddRange(RSACSP.Encrypt(buffer, false));
}
return(list.ToArray());
}
}
}
