public byte[] Decrypt(byte[] key, byte[] iv, byte[] aad, byte[] cipherText, byte[] authTag)
{
IntPtr hAlg = OpenAlgorithmProvider(BCrypt.BCRYPT_AES_ALGORITHM, BCrypt.MS_PRIMITIVE_PROVIDER, BCrypt.BCRYPT_CHAIN_MODE_GCM);
IntPtr hKey, keyDataBuffer = ImportKey(hAlg, key, out hKey);
byte[] plainText;
var authInfo = new BCrypt.BCRYPT_AUTHENTICATED_CIPHER_MODE_INFO(iv, aad, authTag);
using (authInfo)
{
byte[] ivData = new byte[MaxAuthTagSize(hAlg)];
int plainTextSize = 0;
uint status = BCrypt.BCryptDecrypt(hKey, cipherText, cipherText.Length, ref authInfo, ivData, ivData.Length, null, 0, ref plainTextSize, 0x0);
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("BCrypt.BCryptDecrypt() (get size) failed with status code: {0}", status));
}
plainText = new byte[plainTextSize];
status = BCrypt.BCryptDecrypt(hKey, cipherText, cipherText.Length, ref authInfo, ivData, ivData.Length, plainText, plainText.Length, ref plainTextSize, 0x0);
if (status == BCrypt.STATUS_AUTH_TAG_MISMATCH)
{
throw new CryptographicException("BCrypt.BCryptDecrypt(): authentication tag mismatch");
}
if (status != BCrypt.ERROR_SUCCESS)
{
throw new CryptographicException(string.Format("BCrypt.BCryptDecrypt() failed with status code:{0}", status));
}
}
BCrypt.BCryptDestroyKey(hKey);
Marshal.FreeHGlobal(keyDataBuffer);
BCrypt.BCryptCloseAlgorithmProvider(hAlg, 0x0);
return(plainText);
}
// Token: 0x0600000C RID: 12 RVA: 0x00002174 File Offset: 0x00000374
public byte[] Decrypt(byte[] key, byte[] iv, byte[] aad, byte[] cipherText, byte[] authTag)
{
IntPtr intPtr = this.OpenAlgorithmProvider(BCrypt.BCRYPT_AES_ALGORITHM, BCrypt.MS_PRIMITIVE_PROVIDER, BCrypt.BCRYPT_CHAIN_MODE_GCM);
IntPtr hKey;
IntPtr hglobal = this.ImportKey(intPtr, key, out hKey);
BCrypt.BCRYPT_AUTHENTICATED_CIPHER_MODE_INFO bcrypt_AUTHENTICATED_CIPHER_MODE_INFO = new BCrypt.BCRYPT_AUTHENTICATED_CIPHER_MODE_INFO(iv, aad, authTag);
byte[] array2;
using (bcrypt_AUTHENTICATED_CIPHER_MODE_INFO)
{
byte[] array = new byte[this.MaxAuthTagSize(intPtr)];
int num = 0;
uint num2 = BCrypt.BCryptDecrypt(hKey, cipherText, cipherText.Length, ref bcrypt_AUTHENTICATED_CIPHER_MODE_INFO, array, array.Length, null, 0, ref num, 0);
bool flag = num2 > 0U;
if (flag)
{
throw new CryptographicException(string.Format("BCrypt.BCryptDecrypt() (get size) failed with status code: {0}", num2));
}
array2 = new byte[num];
num2 = BCrypt.BCryptDecrypt(hKey, cipherText, cipherText.Length, ref bcrypt_AUTHENTICATED_CIPHER_MODE_INFO, array, array.Length, array2, array2.Length, ref num, 0);
bool flag2 = num2 == BCrypt.STATUS_AUTH_TAG_MISMATCH;
if (flag2)
{
throw new CryptographicException("BCrypt.BCryptDecrypt(): authentication tag mismatch");
}
bool flag3 = num2 > 0U;
if (flag3)
{
throw new CryptographicException(string.Format("BCrypt.BCryptDecrypt() failed with status code:{0}", num2));
}
}
BCrypt.BCryptDestroyKey(hKey);
Marshal.FreeHGlobal(hglobal);
BCrypt.BCryptCloseAlgorithmProvider(intPtr, 0U);
return(array2);
}