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SHA3 CryptoJS equivalent in C#

I have data encrypted with CryptoJS using SHA3 like this example. I try to write in C# using SHA3.NET, a BouncyCastle wrapper.
using (var shaAlg = SHA3.Net.Sha3.Sha3512())
{
var hash = shaAlg.ComputeHash(Encoding.UTF8.GetBytes(data));
var hashString = BitConverter.ToString(result).Replace("-", "").ToLowerInvariant();
}
Using the BouncyCastle directly generates the same result as above (not matched CryptoJS).
var hashAlgorithm = new Org.BouncyCastle.Crypto.Digests.Sha3Digest(512);
byte[] input = Encoding.ASCII.GetBytes(data);
hashAlgorithm.BlockUpdate(input, 0, input.Length);
byte[] result = new byte[64];
hashAlgorithm.DoFinal(result, 0);
string hashString = BitConverter.ToString(result).Replace("-", "").ToLowerInvariant();
When passing data parameter abc the result should be 18587dc2ea106b9a1563e32b3312421ca164c7f1f07bc922a9c83d77cea3a1e5d0c69910739025372dc14ac9642629379540c17e2a65b19d77aa511a9d00bb96 but the result is b751850b1a57168a5693cd924b6b096e08f621827444f70d884f5d0240d2712e10e116e9192af3c91a7ec57647e3934057340b4cf408d5a56592f8274eec53f0

base64_encode(pack("H*",$sha1Signature)) to C#

$sha1Signature = sha1($toEncrypt)
//This will give b14dcc7842a53f1ec7a621e77c106dfbe8283779
$base64Sha1Signature = base64_encode(pack("H*",$sha1Signature));
//This will give sU3MeEKlPx7HpiHnfBBt++goN3k=
My code is calculating SHA1 and displaying the required :
b14dcc7842a53f1ec7a621e77c106dfbe8283779
but Base 64 Encode Result is different. When I send
"b14dcc7842a53f1ec7a621e77c106dfbe8283779" to the following function it gives
"ZmVkMzg5ZjJlNjM0ZmE2YjYyYmRmYmZhZmQwNWJlNzYxMTc2Y2VlOQ==" but I want it to be
"sU3MeEKlPx7HpiHnfBBt++goN3k=".
my code :
string toEncrypt = password+merchantID.Value.ToString()+acquirerID.Value.ToString()+orderID.Value.ToString()+formattedPurchaseAmt1+currency.Value.ToString();
SHA1 sha1Hash = SHA1.Create();
//From String to byte array
byte[] sourceBytes = Encoding.UTF8.GetBytes(toEncrypt);
byte[] hashBytes = sha1Hash.ComputeHash(sourceBytes);
string hash = BitConverter.ToString(hashBytes).Replace("-", String.Empty);
SHA1 sha = new SHA1Managed();
string base64Sha1Signature1 = Convert.ToBase64String(Encoding.UTF8.GetBytes(hash));

C# Convert.ToBase64String VS PHP base64_encode [duplicate]

Can anyone please let me know where I made a mistake in this code? This code is written in C#.NET. I need to write an algorithm for encoding a string using base64 format using C#.NET, and then decoded with base64_decode() using PHP. Please see the snippit below:
System.Security.Cryptography.RijndaelManaged rijndaelCipher = new System.Security.Cryptography.RijndaelManaged();
rijndaelCipher.Mode = System.Security.Cryptography.CipherMode.CBC;
rijndaelCipher.Padding = System.Security.Cryptography.PaddingMode.Zeros;
rijndaelCipher.KeySize = 256;
rijndaelCipher.BlockSize = 128;
byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(_key);
byte[] keyBytes = new byte[16];
int len = pwdBytes.Length;
if (len > keyBytes.Length) len = keyBytes.Length;
System.Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
System.Security.Cryptography.ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
byte[] plainText = Encoding.UTF8.GetBytes(unencryptedString);
byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);
return Convert.ToBase64String(cipherBytes);

I think your code sample is doing "encryption", and you want "encoding".
For encoding a string with Based64 in C#, it should look like this:
static public string EncodeTo64(string toEncode)
{
byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(toEncode);
string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);
return returnValue;
}
And the PHP should look like this:
<?php
$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';
echo base64_decode($str);
?>

I need to write an algorithm for encoding a string using base64 format using C#.net
That's actually quite easy. You don't need all that cryptography stuff that your copy-and-pasted code is using. The following suffices:
byte[] bytes = Encoding.UTF8.GetBytes(inputString);
string outputString = Convert.ToBase64String(bytes);
If you plan to send the data from C# to PHP via a HTTP GET request, don't forget to UrlEncode it. See this question for details:
C# to PHP base64 encode/decode

Converting Byte[] to String to Byte[] - RSA Encryption C#

If I give the decrypter RSAalg2.Decrypt(encryptedData, false); it works fine but I need to convert the encrypted data (byte array) to a string then back to a byte array.
I've tried ASCIIEncoding, UTF-8 rather than Unicode with no luck. I'd appreciate any help I can get. Thanks
UnicodeEncoding ByteConverter = new UnicodeEncoding();
string dataString = "Test";
byte[] dataToEncrypt = ByteConverter.GetBytes(dataString);
byte[] encryptedData;
byte[] decryptedData;
RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();
Console.WriteLine("Original Data: {0}", dataString);
encryptedData = RSAalg.Encrypt(dataToEncrypt, false);
Console.WriteLine("Encrypted Data: {0}", ByteConverter.GetString(encryptedData));
String XML = RSAalg.ToXmlString(true);
XmlDocument doc = new XmlDocument();
doc.LoadXml(XML);
doc.Save(Environment.CurrentDirectory + "\\key.xml");
RSACryptoServiceProvider RSAalg2 = new RSACryptoServiceProvider();
StreamReader sr2 = File.OpenText(Environment.CurrentDirectory + "\\key.xml");
string rsaXml2 = sr2.ReadToEnd();
sr2.Close();
RSAalg2.FromXmlString(rsaXml2);
string s = ByteConverter.GetString(encryptedData);
byte[] se = ByteConverter.GetBytes(s);
decryptedData = RSAalg2.Decrypt(se, false);
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));

The code below demonstrates what you are after.
[Test]
public void RsaEncryptDecryptDemo()
{
const string str = "Test";
var rsa = new RSACryptoServiceProvider();
var encodedData = rsa.Encrypt(Encoding.UTF8.GetBytes(str), false);
var encodedString = Convert.ToBase64String(encodedData);
var decodedData = rsa.Decrypt(Convert.FromBase64String(encodedString), false);
var decodedStr = Encoding.UTF8.GetString(decodedData);
Assert.AreEqual(str, decodedStr);
}
The trick is to convert your byte array into a form that can be represented as a string. To that effect, the example above utilizes Base64 encoding and decoding.

C#: Base64 encoding

Can anyone please let me know where I made a mistake in this code? This code is written in C#.NET. I need to write an algorithm for encoding a string using base64 format using C#.NET, and then decoded with base64_decode() using PHP. Please see the snippit below:
System.Security.Cryptography.RijndaelManaged rijndaelCipher = new System.Security.Cryptography.RijndaelManaged();
rijndaelCipher.Mode = System.Security.Cryptography.CipherMode.CBC;
rijndaelCipher.Padding = System.Security.Cryptography.PaddingMode.Zeros;
rijndaelCipher.KeySize = 256;
rijndaelCipher.BlockSize = 128;
byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(_key);
byte[] keyBytes = new byte[16];
int len = pwdBytes.Length;
if (len > keyBytes.Length) len = keyBytes.Length;
System.Array.Copy(pwdBytes, keyBytes, len);
rijndaelCipher.Key = keyBytes;
rijndaelCipher.IV = keyBytes;
System.Security.Cryptography.ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
byte[] plainText = Encoding.UTF8.GetBytes(unencryptedString);
byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);
return Convert.ToBase64String(cipherBytes);

I think your code sample is doing "encryption", and you want "encoding".
For encoding a string with Based64 in C#, it should look like this:
static public string EncodeTo64(string toEncode)
{
byte[] toEncodeAsBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(toEncode);
string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);
return returnValue;
}
And the PHP should look like this:
<?php
$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';
echo base64_decode($str);
?>

I need to write an algorithm for encoding a string using base64 format using C#.net
That's actually quite easy. You don't need all that cryptography stuff that your copy-and-pasted code is using. The following suffices:
byte[] bytes = Encoding.UTF8.GetBytes(inputString);
string outputString = Convert.ToBase64String(bytes);
If you plan to send the data from C# to PHP via a HTTP GET request, don't forget to UrlEncode it. See this question for details:
C# to PHP base64 encode/decode