public byte[] Decrypt(byte[] bytes, int index, int count, EncryptionPaddingMode padding)
{
ThrowIfObjectDisposed();
if (this.AlgorithmName != AsymmetricAlgName.RSA)
{
throw new InvalidOperationException($"Only supported by RSA.");
}
if (bytes == null)
{
throw new ArgumentNullException(nameof(bytes));
}
if (index < 0)
{
throw new ArgumentOutOfRangeException(nameof(index), $"Argument '{nameof(index)}' value must be >= 0.");
}
if (index >= bytes.Length)
{
throw new ArgumentOutOfRangeException(nameof(index), $"Argument '{nameof(index)}' value exceeds the maximum length of argument '{nameof(bytes)}'.");
}
if (count < 0)
{
throw new ArgumentOutOfRangeException(nameof(count), $"Argument '{nameof(count)}' value must be >= 0.");
}
if (index + count > bytes.Length)
{
throw new ArgumentOutOfRangeException(nameof(count), $"Argument '{nameof(index)} + {nameof(count)}' value exceeds the maximum length of argument '{nameof(bytes)}'.");
}
if (count == bytes.Length)
{
return((this.provider as System.Security.Cryptography.RSA).Decrypt(bytes, ToSysEncryptionPaddingMode(padding)));
}
else
{
var parts = new byte[count];
Array.Copy(bytes, index, parts, 0, count);
return((this.provider as System.Security.Cryptography.RSA).Decrypt(parts, ToSysEncryptionPaddingMode(padding)));
}
}
public byte[] Decrypt(byte[] bytes, EncryptionPaddingMode padding)
{
AssertUtil.ArgumentNotNull(bytes, nameof(bytes));
return(Decrypt(bytes, 0, bytes.Length, padding));
}
static System.Security.Cryptography.RSAEncryptionPadding ToSysEncryptionPaddingMode(EncryptionPaddingMode padding)
{
switch (padding)
{
case EncryptionPaddingMode.Pkcs1:
return(System.Security.Cryptography.RSAEncryptionPadding.Pkcs1);
case EncryptionPaddingMode.OaepSHA1:
return(System.Security.Cryptography.RSAEncryptionPadding.OaepSHA1);
case EncryptionPaddingMode.OaepSHA256:
return(System.Security.Cryptography.RSAEncryptionPadding.OaepSHA256);
case EncryptionPaddingMode.OaepSHA384:
return(System.Security.Cryptography.RSAEncryptionPadding.OaepSHA384);
case EncryptionPaddingMode.OaepSHA512:
return(System.Security.Cryptography.RSAEncryptionPadding.OaepSHA512);
default:
throw new Exception();
}
}
