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C#Diff

Created 5 months agoDiff never expires

6 removals

64 lines

5 additions

63 lines

using System;

using System.Security.Cryptography;

using System.Text;

class SSN

{

public string EncryptString(string plainString, string keyString, string encryptionIV)

{

byte[] key = Encoding.UTF8.GetBytes(keyString);

byte[] key = Encoding.UTF8.GetBytes(keyString.Substring(0, 16));

byte[] iv = Encoding.UTF8.GetBytes(encryptionIV);

byte[] iv = Encoding.UTF8.GetBytes(encryptionIV.Substring(0, 16));

using (Aes aesAlg = Aes.Create())

{

aesAlg.KeySize = 128;

aesAlg.Key = key;

aesAlg.IV = iv;

aesAlg.Mode = CipherMode.CBC;

aesAlg.Padding = PaddingMode.None;

ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

byte[] plainBytes = Encoding.UTF8.GetBytes(plainString);

int blockSize = 16;

int paddingNeeded = blockSize - (plainBytes.Length % blockSize);

byte[] paddedBytes = new byte[plainBytes.Length + paddingNeeded];

Array.Copy(plainBytes, paddedBytes, plainBytes.Length);

for (int i = plainBytes.Length; i < paddedBytes.Length; i++)

{

paddedBytes[i] = (byte)paddingNeeded;

}

byte[] encryptedBytes = encryptor.TransformFinalBlock(paddedBytes, 0, paddedBytes.Length);

return Convert.ToBase64String(encryptedBytes);

}

public string DecryptString(string encryptedString, string keyString, string encryptionIV)

{

byte[] key = Encoding.UTF8.GetBytes(keyString);

byte[] key = Encoding.UTF8.GetBytes(keyString.Substring(0, 16));

byte[] iv = Encoding.UTF8.GetBytes(encryptionIV);

byte[] iv = Encoding.UTF8.GetBytes(encryptionIV.Substring(0, 16));

using (Aes aesAlg = Aes.Create())

{

aesAlg.KeySize = 128;

aesAlg.Key = key;

aesAlg.IV = iv;

aesAlg.Mode = CipherMode.CBC;

aesAlg.Padding = PaddingMode.None;

ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

byte[] encryptedBytes = Convert.FromBase64String(encryptedString);

byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);

int paddingByte = decryptedBytes[decryptedBytes.Length - 1];

int unpaddedLength = decryptedBytes.Length - paddingByte;

return Encoding.UTF8.GetString(decryptedBytes, 0, unpaddedLength);

}

Diffs guardadas

Texto original

Open file

using System;
using System.Security.Cryptography;
using System.Text;

class SSN
{
    public string EncryptString(string plainString, string keyString, string encryptionIV)
    {
        byte[] key = Encoding.UTF8.GetBytes(keyString);
        byte[] iv = Encoding.UTF8.GetBytes(encryptionIV);

using (Aes aesAlg = Aes.Create())
        {
            aesAlg.KeySize = 128;
            aesAlg.Key = key;
            aesAlg.IV = iv;
            aesAlg.Mode = CipherMode.CBC;
            aesAlg.Padding = PaddingMode.None;

ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

byte[] plainBytes = Encoding.UTF8.GetBytes(plainString);

int blockSize = 16;
            int paddingNeeded = blockSize - (plainBytes.Length % blockSize);

byte[] paddedBytes = new byte[plainBytes.Length + paddingNeeded];
            Array.Copy(plainBytes, paddedBytes, plainBytes.Length);
            for (int i = plainBytes.Length; i < paddedBytes.Length; i++)
            {
                paddedBytes[i] = (byte)paddingNeeded;
            }

byte[] encryptedBytes = encryptor.TransformFinalBlock(paddedBytes, 0, paddedBytes.Length);

return Convert.ToBase64String(encryptedBytes);
        }
    }

public string DecryptString(string encryptedString, string keyString, string encryptionIV)
    {
        byte[] key = Encoding.UTF8.GetBytes(keyString);
        byte[] iv = Encoding.UTF8.GetBytes(encryptionIV);

ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

byte[] encryptedBytes = Convert.FromBase64String(encryptedString);
            byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);

int paddingByte = decryptedBytes[decryptedBytes.Length - 1];
            int unpaddedLength = decryptedBytes.Length - paddingByte;

return Encoding.UTF8.GetString(decryptedBytes, 0, unpaddedLength);
        }
    }
}

Texto modificado

Open file

using System;
using System.Security.Cryptography;
using System.Text;

class SSN
{
    public string EncryptString(string plainString, string keyString, string encryptionIV)
    {
        byte[] key = Encoding.UTF8.GetBytes(keyString.Substring(0, 16));
        byte[] iv = Encoding.UTF8.GetBytes(encryptionIV.Substring(0, 16));

using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = key;
            aesAlg.IV = iv;
            aesAlg.Mode = CipherMode.CBC;
            aesAlg.Padding = PaddingMode.None;

ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

byte[] plainBytes = Encoding.UTF8.GetBytes(plainString);

int blockSize = 16;
            int paddingNeeded = blockSize - (plainBytes.Length % blockSize);

byte[] encryptedBytes = encryptor.TransformFinalBlock(paddedBytes, 0, paddedBytes.Length);

return Convert.ToBase64String(encryptedBytes);
        }
    }

public string DecryptString(string encryptedString, string keyString, string encryptionIV)
    {
        byte[] key = Encoding.UTF8.GetBytes(keyString.Substring(0, 16));
        byte[] iv = Encoding.UTF8.GetBytes(encryptionIV.Substring(0, 16));

using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = key;
            aesAlg.IV = iv;
            aesAlg.Mode = CipherMode.CBC;
            aesAlg.Padding = PaddingMode.None;

ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

byte[] encryptedBytes = Convert.FromBase64String(encryptedString);
            byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);

int paddingByte = decryptedBytes[decryptedBytes.Length - 1];
            int unpaddedLength = decryptedBytes.Length - paddingByte;

return Encoding.UTF8.GetString(decryptedBytes, 0, unpaddedLength);
        }
    }
}