AWS4Authentication | C# Online Compiler

AWS4Authentication by hyeonlab

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

public static class AWS4Authentication
{
	public static void Main()
	{
		string dateStamp = "20191224";
		var signKey = "kv4K9ApRZtfLUxQzbJMubJFDjL80FXUi9DbQdc/P";
		string regionName = "ap-northeast-2";
		string serviceName = "s3";
		
		byte[] kSigning = getSignatureKey(signKey, dateStamp, regionName, serviceName);
		string kSigningHex = convertHexa(getSignatureKey(signKey, dateStamp, regionName, serviceName));
		
		string stingToSign = "AWS4-HMAC-SHA256\n20191224T004317Z\n20191224/ap-northeast-2/s3/aws4_request\n29fb7cf5ea96752eb0569e215f43602758fa2222b8ff6624bcab39b960a19fd8";
		
		byte[] signiture = encryptHmacSHA256(stingToSign, kSigning);
		string signitureHex = convertHexa(signiture);
		
		Console.WriteLine(stingToSign);	
		Console.WriteLine(kSigningHex);	
		Console.WriteLine(signitureHex);
	}

	static byte[] encryptHmacSHA256(String data, byte[] key)
	{
		String algorithm = "HmacSHA256";
		KeyedHashAlgorithm kha = KeyedHashAlgorithm.Create(algorithm);
		kha.Key = key;

		return kha.ComputeHash(Encoding.UTF8.GetBytes(data));
	}
	
	public static byte[] encryptSHA256(string input)
	{
		SHA256CryptoServiceProvider provider = new SHA256CryptoServiceProvider();

		byte[] inputBytes = Encoding.UTF8.GetBytes(input);
		return provider.ComputeHash(inputBytes);
	}
		
	public static string convertHexa(byte[] data)
	{
		StringBuilder output = new StringBuilder();

		for (int i = 0; i < data.Length; i++)
			output.Append(data[i].ToString("x2").ToLower());

		return output.ToString();
	}

	static byte[] getSignatureKey(String key, String dateStamp, String regionName, String serviceName)
	{
		byte[] kSecret = Encoding.UTF8.GetBytes(("AWS4" + key).ToCharArray());
		byte[] kDate = encryptHmacSHA256(dateStamp, kSecret);
		byte[] kRegion = encryptHmacSHA256(regionName, kDate);
		byte[] kService = encryptHmacSHA256(serviceName, kRegion);
		byte[] kSigning = encryptHmacSHA256("aws4_request", kService);

		return kSigning;
	}
}

​x
 
using System;
using System.Security.Cryptography;
using System.Text;
​
public static class AWS4Authentication
{
    public static void Main()
    {
        string dateStamp = "20191224";
        var signKey = "kv4K9ApRZtfLUxQzbJMubJFDjL80FXUi9DbQdc/P";
        string regionName = "ap-northeast-2";
        string serviceName = "s3";
        
        byte[] kSigning = getSignatureKey(signKey, dateStamp, regionName, serviceName);
        string kSigningHex = convertHexa(getSignatureKey(signKey, dateStamp, regionName, serviceName));
        
        string stingToSign = "AWS4-HMAC-SHA256\n20191224T004317Z\n20191224/ap-northeast-2/s3/aws4_request\n29fb7cf5ea96752eb0569e215f43602758fa2222b8ff6624bcab39b960a19fd8";
        
        byte[] signiture = encryptHmacSHA256(stingToSign, kSigning);
        string signitureHex = convertHexa(signiture);
        
        Console.WriteLine(stingToSign); 
        Console.WriteLine(kSigningHex); 
        Console.WriteLine(signitureHex);
    }
​
    static byte[] encryptHmacSHA256(String data, byte[] key)
    {
        String algorithm = "HmacSHA256";
        KeyedHashAlgorithm kha = KeyedHashAlgorithm.Create(algorithm);
        kha.Key = key;
​
        return kha.ComputeHash(Encoding.UTF8.GetBytes(data));
    }
    
    public static byte[] encryptSHA256(string input)
    {
        SHA256CryptoServiceProvider provider = new SHA256CryptoServiceProvider();
​
        byte[] inputBytes = Encoding.UTF8.GetBytes(input);
        return provider.ComputeHash(inputBytes);
    }
        
    public static string convertHexa(byte[] data)
    {
        StringBuilder output = new StringBuilder();
​
        for (int i = 0; i < data.Length; i++)
            output.Append(data[i].ToString("x2").ToLower());
​
        return output.ToString();
    }
​
    static byte[] getSignatureKey(String key, String dateStamp, String regionName, String serviceName)
    {
        byte[] kSecret = Encoding.UTF8.GetBytes(("AWS4" + key).ToCharArray());
        byte[] kDate = encryptHmacSHA256(dateStamp, kSecret);
        byte[] kRegion = encryptHmacSHA256(regionName, kDate);
        byte[] kService = encryptHmacSHA256(serviceName, kRegion);
        byte[] kSigning = encryptHmacSHA256("aws4_request", kService);
​
        return kSigning;
    }
}

Sum1 = 9
Sum2 = -43
RG1 = 8
RG2 = 13
CNTsqrt = -1
CNTres = 0

x     Sum2               Sum2 overflow    Sum1           CNTsqrt          CNTsqrt overflow    CNTres
1     -43 + 18 = -25                      9 + 8 = 17
2     -25 + 34 = 9       1                17 + 8 = 25    -1 + 1 = 0       1                   1
                                                         0 + -2 = -2
      9 + -26 = -17
3     -17 + 50 = 33      1                25 + 8 = 33    -2 + 1 = -1
      33 + -26 = 7       1                               -1 + 1 = 0       1                   2
                                                         0 + -4 = -4
      7 + -26 = -19
4     -19 + 66 = 47      1                33 + 8 = 41    -4 + 1 = -3
      47 + -26 = 21      1                               -3 + 1 = -2
      21 + -26 = -5
5     -5 + 82 = 77       1                41 + 8 = 49    -2 + 1 = -1
      77 + -26 = 51      1                               -1 + 1 = 0       1                   3
                                                         0 + -6 = -6
      51 + -26 = 25      1                               -6 + 1 = -5
      25 + -26 = -1
6     -1 + 98 = 97       1                49 + 8 = 57    -5 + 1 = -4
      97 + -26 = 71      1                               -4 + 1 = -3
      71 + -26 = 45      1                               -3 + 1 = -2
      45 + -26 = 19      1                               -2 + 1 = -1
      19 + -26 = -7
7     -7 + 114 = 107     1                57 + 8 = 65    -1 + 1 = 0       1                   4
                                                         0 + -8 = -8
      107 + -26 = 81     1                               -8 + 1 = -7
      81 + -26 = 55      1                               -7 + 1 = -6
      55 + -26 = 29      1                               -6 + 1 = -5
      29 + -26 = 3       1                               -5 + 1 = -4
      3 + -26 = -23
8     -23 + 130 = 107    1                65 + 8 = 73    -4 + 1 = -3
      107 + -26 = 81     1                               -3 + 1 = -2
      81 + -26 = 55      1                               -2 + 1 = -1
      55 + -26 = 29      1                               -1 + 1 = 0       1                   5
                                                         0 + -10 = -10
      29 + -26 = 3       1                               -10 + 1 = -9
      3 + -26 = -23
9     -23 + 146 = 123    1                73 + 8 = 81    -9 + 1 = -8
      123 + -26 = 97     1                               -8 + 1 = -7
      97 + -26 = 71      1                               -7 + 1 = -6
      71 + -26 = 45      1                               -6 + 1 = -5
      45 + -26 = 19      1                               -5 + 1 = -4
      19 + -26 = -7
10    -7 + 162 = 155     1                81 + 8 = 89    -4 + 1 = -3
      155 + -26 = 129    1                               -3 + 1 = -2
      129 + -26 = 103    1                               -2 + 1 = -1
      103 + -26 = 77     1                               -1 + 1 = 0       1                   6
                                                         0 + -12 = -12
      77 + -26 = 51      1                               -12 + 1 = -11
      51 + -26 = 25      1                               -11 + 1 = -10
      25 + -26 = -1

Cached Result
Last Run:	4:01:35 am
Compile:	0.127s
Execute:	0s
Memory:	152.05kb
CPU:	0s

View IL Code