[英]Replicate T-SQL DecryptByPassPhrase in C#
我想創建一個C#類來解密使用T-SQL的EncryptByPassPhrase加密的字節數組。 (是的,我知道我可以在SQL Server中解密,但我需要的是能夠在數據庫層和中間層中等效加密/解密。)
據我所知,SQL Server的EncryptByPassPhrase和DecryptByPassPhrase使用TripleDES對稱密鑰算法。 但是,我不清楚IV應該模擬SQL Server的密碼學。 我可以使用TripleDESCryptoServiceProvider類加密/解密,但我找不到正確的key和IV實現來復制SQL Server正在做的事情。
有沒有人做過類似的事情? 謝謝!
(1)使用C#生成密鑰/ iv對:TripleDESCryptoServiceProvider cp = new TripleDESCryptoServiceProvider();
MemoryStream m = new MemoryStream(Convert.FromBase64String(Convert.ToBase64String(ASCIIEncoding.ASCII.GetBytes(plainText))));
CryptoStream cs = new CryptoStream(m, cp.CreateEncryptor(cp.Key, cp.IV), CryptoStreamMode.Read);
cp.Key = Convert.FromBase64String("BeaYzNeHfDb27OFYgaYHUd5HUJE2aZyI");
cp.IV = Convert.FromBase64String("T/ENF5G4sCA=");
string key = Convert.ToBase64String(cp.Key);
string iv = Convert.ToBase64String(cp.IV);
// write key/iv to a file here
(2)完成后,使用這樣的代碼進行編碼
TripleDESCryptoServiceProvider cp = new TripleDESCryptoServiceProvider();
MemoryStream m = new MemoryStream(Convert.FromBase64String(Convert.ToBase64String(ASCIIEncoding.ASCII.GetBytes(plainText))));
CryptoStream cs = new CryptoStream(m, cp.CreateEncryptor(cp.Key, cp.IV), CryptoStreamMode.Read);
cp.Key = Convert.FromBase64String("the key value from above");
cp.IV = Convert.FromBase64String("the iv value from above");
string key = Convert.ToBase64String(cp.Key);
string iv = Convert.ToBase64String(cp.IV);
List<byte> r = new List<byte>();
int x = 0;
for (; x > -1; )
{
x = cs.ReadByte();
if (x > -1)
r.Add((byte)x);
}
byte[] y = r.ToArray();
string cypherText = Convert.ToBase64String(y);
(3)然后解碼:
TripleDESCryptoServiceProvider cp = new TripleDESCryptoServiceProvider();
MemoryStream m = new MemoryStream(Convert.FromBase64String(cypherText));
cp.Key = Convert.FromBase64String("the key value from above");
cp.IV = Convert.FromBase64String("the iv value from above");
CryptoStream cs = new CryptoStream(m, cp.CreateDecryptor(cp.Key, cp.IV), CryptoStreamMode.Read);
StreamReader reader = new StreamReader(cs);
string plainText = reader.ReadToEnd();
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