You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
1.9 KiB
80 lines
1.9 KiB
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR) |
|
#pragma warning disable |
|
using System; |
|
using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto; |
|
using BestHTTP.SecureProtocol.Org.BouncyCastle.Security; |
|
|
|
|
|
namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Paddings |
|
{ |
|
|
|
/** |
|
* A padder that adds ISO10126-2 padding to a block. |
|
*/ |
|
public class ISO10126d2Padding: IBlockCipherPadding |
|
{ |
|
private SecureRandom random; |
|
|
|
/** |
|
* Initialise the padder. |
|
* |
|
* @param random a SecureRandom if available. |
|
*/ |
|
public void Init( |
|
SecureRandom random) |
|
//throws ArgumentException |
|
{ |
|
this.random = (random != null) ? random : new SecureRandom(); |
|
} |
|
|
|
/** |
|
* Return the name of the algorithm the cipher implements. |
|
* |
|
* @return the name of the algorithm the cipher implements. |
|
*/ |
|
public string PaddingName |
|
{ |
|
get { return "ISO10126-2"; } |
|
} |
|
|
|
/** |
|
* add the pad bytes to the passed in block, returning the |
|
* number of bytes added. |
|
*/ |
|
public int AddPadding( |
|
byte[] input, |
|
int inOff) |
|
{ |
|
byte code = (byte)(input.Length - inOff); |
|
|
|
while (inOff < (input.Length - 1)) |
|
{ |
|
input[inOff] = (byte)random.NextInt(); |
|
inOff++; |
|
} |
|
|
|
input[inOff] = code; |
|
|
|
return code; |
|
} |
|
|
|
/** |
|
* return the number of pad bytes present in the block. |
|
*/ |
|
public int PadCount(byte[] input) |
|
//throws InvalidCipherTextException |
|
{ |
|
int count = input[input.Length - 1] & 0xff; |
|
|
|
if (count > input.Length) |
|
{ |
|
throw new InvalidCipherTextException("pad block corrupted"); |
|
} |
|
|
|
return count; |
|
} |
|
} |
|
|
|
} |
|
#pragma warning restore |
|
#endif
|
|
|