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using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.OpenSsl;
using Org.BouncyCastle.Security;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;
namespace Hazel.UnitTests
{
static class Utils
{
/// <summary>
/// Hex encode a byte array (lower case)
/// </summary>
public static string BytesToHex(byte[] data)
{
string chars = "0123456789abcdef";
StringBuilder sb = new StringBuilder(data.Length * 2);
for (int ii = 0, nn = data.Length; ii != nn; ++ii)
{
sb.Append(chars[data[ii] >> 4]);
sb.Append(chars[data[ii] & 0xF]);
}
return sb.ToString().ToLower();
}
/// <summary>
/// Decode a hex string to a byte array (lowercase)
/// </summary>
public static byte[] HexToBytes(string hex)
{
hex = hex.ToLower();
hex = hex = string.Concat(hex.Where(c => !char.IsWhiteSpace(c)));
byte[] output = new byte[hex.Length / 2];
for (int ii = 0; ii != hex.Length; ++ii)
{
byte nibble;
char c = hex[ii];
if (c >= 'a')
{
nibble = (byte)(0x0A + c - 'a');
}
else
{
nibble = (byte)(c - '0');
}
if ((ii & 1) == 0)
{
output[ii / 2] = (byte)(nibble << 4);
}
else
{
output[ii / 2] |= nibble;
}
}
return output;
}
public static byte[] DecodePEM(string pemData)
{
List<byte> result = new List<byte>();
pemData = pemData.Replace("\r", "");
string[] lines = pemData.Split('\n');
foreach (string line in lines)
{
if (line.StartsWith("-----"))
{
continue;
}
byte[] lineData = Convert.FromBase64String(line);
result.AddRange(lineData);
}
return result.ToArray();
}
public static RSA DecodeRSAKeyFromPEM(string pemData)
{
var pemReader = new PemReader(new StringReader(pemData));
var parameters = DotNetUtilities.ToRSAParameters((RsaPrivateCrtKeyParameters)pemReader.ReadObject());
var rsa = RSA.Create();
rsa.ImportParameters(parameters);
return rsa;
}
}
}
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