问题
I have a string that was encrypted with ColdFusion 9 using the encrypt() function. The problem is that the function was called using the the UUEncode algorithm (default). I need to decrypt this value using C#. All of the samples use Base64 encoding. Any ideas?
Here's what was used in ColdFusion
<cfset encryptionKey = generateSecretKey( "AES" ) />
<cfset pwhash = encrypt( user_password,
encryptionKey,
"AES",
"UU"
) />
I have the resulting values. I also have the resulting decrypted value for one user, so I could compare it with something in C#. I need to decrypt the passwords for all users in a system.
回答1:
Thanks to @Leigh and his answer here I was able to implement a solution using this C# implementation of UUEncoding like so:
public class PasswordHelper
{
public string DecryptAES(string encryptedString, string Key)
{
//First write to memory
MemoryStream mmsStream = new MemoryStream();
StreamWriter srwTemp = new StreamWriter(mmsStream);
//sBuffer is my encodedtext.
srwTemp.Write(encryptedString);
srwTemp.Flush();
mmsStream.Position = 0;
MemoryStream outstream = new MemoryStream();
//CallingUUDecode
Codecs.UUDecode(mmsStream, outstream);
//Extract the bytes of each of the values
byte[] input = outstream.ToArray();
byte[] key = Convert.FromBase64String(Key);
string decryptedText = null;
using (RijndaelManaged algorithm = new RijndaelManaged())
{
// initialize settings to match those used by CF
algorithm.Mode = CipherMode.ECB;
algorithm.Padding = PaddingMode.PKCS7;
algorithm.BlockSize = 128;
algorithm.KeySize = 128;
algorithm.Key = key;
ICryptoTransform decryptor = algorithm.CreateDecryptor();
using (MemoryStream msDecrypt = new MemoryStream(input))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
decryptedText = srDecrypt.ReadToEnd();
}
}
}
}
return decryptedText;
}
}
public static class Codecs
{
static readonly byte[] UUEncMap = new byte[]
{
0x60, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F
};
static readonly byte[] UUDecMap = new byte[]
{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
public static void UUDecode(System.IO.Stream input, System.IO.Stream output)
{
if (input == null)
throw new ArgumentNullException("input");
if (output == null)
throw new ArgumentNullException("output");
long len = input.Length;
if (len == 0)
return;
long didx = 0;
int nextByte = input.ReadByte();
while (nextByte >= 0)
{
// get line length (in number of encoded octets)
int line_len = UUDecMap[nextByte];
// ascii printable to 0-63 and 4-byte to 3-byte conversion
long end = didx + line_len;
byte A, B, C, D;
if (end > 2)
{
while (didx < end - 2)
{
A = UUDecMap[input.ReadByte()];
B = UUDecMap[input.ReadByte()];
C = UUDecMap[input.ReadByte()];
D = UUDecMap[input.ReadByte()];
output.WriteByte((byte)(((A << 2) & 255) | ((B >> 4) & 3)));
output.WriteByte((byte)(((B << 4) & 255) | ((C >> 2) & 15)));
output.WriteByte((byte)(((C << 6) & 255) | (D & 63)));
didx += 3;
}
}
if (didx < end)
{
A = UUDecMap[input.ReadByte()];
B = UUDecMap[input.ReadByte()];
output.WriteByte((byte)(((A << 2) & 255) | ((B >> 4) & 3)));
didx++;
}
if (didx < end)
{
B = UUDecMap[input.ReadByte()];
C = UUDecMap[input.ReadByte()];
output.WriteByte((byte)(((B << 4) & 255) | ((C >> 2) & 15)));
didx++;
}
// skip padding
do
{
nextByte = input.ReadByte();
}
while (nextByte >= 0 && nextByte != '\n' && nextByte != '\r');
// skip end of line
do
{
nextByte = input.ReadByte();
}
while (nextByte >= 0 && (nextByte == '\n' || nextByte == '\r'));
}
}
public static void UUEncode(System.IO.Stream input, System.IO.Stream output)
{
if (input == null)
throw new ArgumentNullException("input");
if (output == null)
throw new ArgumentNullException("output");
long len = input.Length;
if (len == 0)
return;
int sidx = 0;
int line_len = 45;
byte[] nl = Encoding.ASCII.GetBytes(Environment.NewLine);
byte A, B, C;
// split into lines, adding line-length and line terminator
while (sidx + line_len < len)
{
// line length
output.WriteByte(UUEncMap[line_len]);
// 3-byte to 4-byte conversion + 0-63 to ascii printable conversion
for (int end = sidx + line_len; sidx < end; sidx += 3)
{
A = (byte)input.ReadByte();
B = (byte)input.ReadByte();
C = (byte)input.ReadByte();
output.WriteByte(UUEncMap[(A >> 2) & 63]);
output.WriteByte(UUEncMap[(B >> 4) & 15 | (A << 4) & 63]);
output.WriteByte(UUEncMap[(C >> 6) & 3 | (B << 2) & 63]);
output.WriteByte(UUEncMap[C & 63]);
}
// line terminator
for (int idx = 0; idx < nl.Length; idx++)
output.WriteByte(nl[idx]);
}
// line length
output.WriteByte(UUEncMap[len - sidx]);
// 3-byte to 4-byte conversion + 0-63 to ascii printable conversion
while (sidx + 2 < len)
{
A = (byte)input.ReadByte();
B = (byte)input.ReadByte();
C = (byte)input.ReadByte();
output.WriteByte(UUEncMap[(A >> 2) & 63]);
output.WriteByte(UUEncMap[(B >> 4) & 15 | (A << 4) & 63]);
output.WriteByte(UUEncMap[(C >> 6) & 3 | (B << 2) & 63]);
output.WriteByte(UUEncMap[C & 63]);
sidx += 3;
}
if (sidx < len - 1)
{
A = (byte)input.ReadByte();
B = (byte)input.ReadByte();
output.WriteByte(UUEncMap[(A >> 2) & 63]);
output.WriteByte(UUEncMap[(B >> 4) & 15 | (A << 4) & 63]);
output.WriteByte(UUEncMap[(B << 2) & 63]);
output.WriteByte(UUEncMap[0]);
}
else if (sidx < len)
{
A = (byte)input.ReadByte();
output.WriteByte(UUEncMap[(A >> 2) & 63]);
output.WriteByte(UUEncMap[(A << 4) & 63]);
output.WriteByte(UUEncMap[0]);
output.WriteByte(UUEncMap[0]);
}
// line terminator
for (int idx = 0; idx < nl.Length; idx++)
output.WriteByte(nl[idx]);
}
}
来源：https://stackoverflow.com/questions/38110956/encrypt-in-coldfusion-decrypt-in-c-sharp