/// <summary>
/// Computes the hash.
/// </summary>
/// <param name="version">The version.</param>
/// <param name="header">The header.</param>
/// <param name="parameters">The parameters.</param>
/// <param name="data">The scope bytes.</param>
/// <param name="privacy">The privacy provider.</param>
/// <returns></returns>
public OctetString ComputeHash(VersionCode version, ISegment header, SecurityParameters parameters, ISnmpData data, IPrivacyProvider privacy)
{
if (header == null)
{
throw new ArgumentNullException("header");
}
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
if (data == null)
{
throw new ArgumentNullException("data");
}
if (privacy == null)
{
throw new ArgumentNullException("privacy");
}
byte[] key = PasswordToKey(_password, parameters.EngineId.GetRaw());
using (HMACSHA1 sha1 = new HMACSHA1(key))
{
byte[] hash = sha1.ComputeHash(SnmpMessageExtension.PackMessage(version, header, parameters, data).ToBytes());
sha1.Clear();
byte[] result = new byte[DigestLength];
Buffer.BlockCopy(hash, 0, result, 0, result.Length);
return(new OctetString(result));
}
}
/// <summary>
/// Returns the hash code.
/// </summary>
/// <returns>
/// A hash code for the current <see cref="T:System.Object"/>.
/// </returns>
public override int GetHashCode()
{
HMACSHA1 hmac = new HMACSHA1(this.SecretKey);
try {
CryptoStream cs = new CryptoStream(Stream.Null, hmac, CryptoStreamMode.Write);
byte[] hbytes = ASCIIEncoding.ASCII.GetBytes(this.Handle);
cs.Write(hbytes, 0, hbytes.Length);
cs.Close();
byte[] hash = hmac.Hash;
hmac.Clear();
long val = 0;
for (int i = 0; i < hash.Length; i++)
{
val = val ^ (long)hash[i];
}
val = val ^ this.Expires.ToFileTimeUtc();
return((int)val);
} finally {
((IDisposable)hmac).Dispose();
}
}
/// <summary>
/// Generate a TOTP using provided binary data.
/// </summary>
/// <param name="key">Binary data.</param>
/// <returns>Time-based One Time Password encoded byte array.</returns>
public string GenerateByByte(byte[] key)
{
HMACSHA1 hmac = new HMACSHA1(key, true); //Instanciates a new hash provider with a key.
byte[] codeInterval = BitConverter.GetBytes((ulong)Counter);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(codeInterval);
}
byte[] hash = hmac.ComputeHash(codeInterval); //Generates hash from key using counter.
hmac.Clear(); //Clear hash instance securing the key.
int start = hash[hash.Length - 1] & 0xf;
byte[] totp = new byte[4];
Array.Copy(hash, start, totp, 0, 4);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(totp);
}
return(this.encoder(totp, length));
}
protected override void Dispose(bool disposing)
{
Array.Clear(_buffer, 0, _buffer.Length);
Array.Clear(_salt, 0, _salt.Length);
_hmac.Clear();
base.Dispose(disposing);
}
/// <summary>
/// Computes the hash.
/// </summary>
/// <param name="version">The version.</param>
/// <param name="header">The header.</param>
/// <param name="parameters">The parameters.</param>
/// <param name="data">The scope bytes.</param>
/// <param name="privacy">The privacy provider.</param>
/// <param name="length">The length bytes.</param>
/// <returns></returns>
public OctetString ComputeHash(VersionCode version, ISegment header, SecurityParameters parameters, ISnmpData data, IPrivacyProvider privacy, byte[] length)
{
if (header == null)
{
throw new ArgumentNullException(nameof(header));
}
if (parameters == null)
{
throw new ArgumentNullException(nameof(parameters));
}
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
if (privacy == null)
{
throw new ArgumentNullException(nameof(privacy));
}
var key = PasswordToKey(_password, parameters.EngineId.GetRaw());
using (var sha1 = new HMACSHA1(key))
{
var hash = sha1.ComputeHash(ByteTool.PackMessage(length, version, header, parameters, data).ToBytes());
#if NET452
sha1.Clear();
#endif
var result = new byte[DigestLength];
Buffer.BlockCopy(hash, 0, result, 0, result.Length);
return(new OctetString(result));
}
}
public static string GetHamcSha1ToBase64(string content, Encoding contentEncoding, string key, Encoding keyEncoding)
{
HMACSHA1 hmacSha1 = new HMACSHA1(keyEncoding.GetBytes(key));
byte[] result = hmacSha1.ComputeHash(contentEncoding.GetBytes(content));
hmacSha1.Clear();
return(Convert.ToBase64String(result));
}
/// <summary>
/// Authenticate supplied message and return the hashed value
/// </summary>
/// <param name="data">Data to hash</param>
/// <param name="offset">Offset within the data to begin hashing from</param>
/// <param name="length">Length of data to hash</param>
/// <returns>Hashed value</returns>
public byte[] authenticateMessage(byte[] data, int offset, int length)
{
HMACSHA1 sha = new HMACSHA1();
byte[] res = sha.ComputeHash(data, offset, length);
// UPDATE May/12 2009 - release SHA resources before exit
sha.Clear();
return(res);
}
public string ComputeSignature(string signatureBase, string consumerSecret, string tokenSecret)
{
using (HMACSHA1 crypto = new HMACSHA1()) {
string key = Rfc3986.Encode(consumerSecret) + "&" + Rfc3986.Encode(tokenSecret);
crypto.Key = Encoding.ASCII.GetBytes(key);
string hash = Convert.ToBase64String(crypto.ComputeHash(Encoding.ASCII.GetBytes(signatureBase)));
crypto.Clear();
return(hash);
}
}
public static string HMACSHA1(string sourceText, string key)
{
var keyByte = Encoding.UTF8.GetBytes(key);
var sourceBytes = Encoding.UTF8.GetBytes(sourceText);
using (var hmacSha1 = new HMACSHA1(keyByte))
{
var bytes = hmacSha1.ComputeHash(sourceBytes);
hmacSha1.Clear();
return(BitConverter.ToString(bytes).Replace("-", "").ToLower());
}
}
/// <summary>
/// Authenticate message for sending.
/// </summary>
/// <param name="userPassword">User password</param>
/// <param name="engineId">Authoritative engine id</param>
/// <param name="wholeMessage">Un-authenticated message with authenticationParameter field set to 12 byte OctetString
/// with all bytes initialized to 0x00.</param>
/// <param name="authFieldOffset">Offset of the authentication field in the wholeMessage buffer</param>
public void authenticateOutgoingMsg(byte[] userPassword, byte[] engineId, MutableByte wholeMessage, int authFieldOffset)
{
byte[] authKey = PasswordToKey(userPassword, engineId);
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
// copy 12 bytes of the hash into the wholeMessage
for (int i = 0; i < 12; i++)
{
wholeMessage[authFieldOffset + i] = hash[i];
}
sha.Clear(); // release resources
}
public static byte[] CreateHash(string strTexto, byte[] objKey)
{
HMACSHA1 _objHMACSHA = new HMACSHA1(objKey);
try
{
return(_objHMACSHA.ComputeHash(Encoding.UTF8.GetBytes(strTexto)));
}
finally
{
_objHMACSHA.Clear();
}
}
// NOTE: .NET 4.0 finally implemented
/// <summary>
/// Disposes of the object
/// </summary>
public void Dispose()
{
base.Salt = new byte[8];
base.IterationCount = 1;
//The base doesn't clear the key'd hash, which contains the password in clear text when < 20 bytes
FieldInfo f_hmacsha1 = GetType().BaseType.GetField("m_hmacsha1", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField);
if (f_hmacsha1 != null)
{
HMACSHA1 m_hmacsha1 = f_hmacsha1.GetValue(this) as HMACSHA1;
m_hmacsha1.Clear();
}
}
/// <summary>
/// Verify SHA-1 authentication of a packet.
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="authenticationParameters">Authentication parameters extracted from the packet being authenticated</param>
/// <param name="wholeMessage">Entire packet being authenticated</param>
/// <returns>True on authentication success, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] authKey, byte[] authenticationParameters, MutableByte wholeMessage)
{
var sha = new HMACSHA1(authKey);
var hash = sha.ComputeHash(wholeMessage);
var myhash = new MutableByte(hash, 12);
sha.Clear(); // release resources
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
public byte[] GenerateResponse(byte[] challenge, byte[] key)
{
HMACSHA1 hmac = new HMACSHA1(key);
if (LT64)
{
challenge = challenge.Take(challengeLenBytes - 1).ToArray();
}
byte[] resp = hmac.ComputeHash(challenge);
hmac.Clear();
return(resp);
}
public static string Encrypt(string strKey, string strSrc)
{
if (string.IsNullOrEmpty(strKey) || string.IsNullOrEmpty(strSrc))
{
return("");
}
ASCIIEncoding ascEnc = new ASCIIEncoding();
HMACSHA1 hmacsha1 = new HMACSHA1(ascEnc.GetBytes(strKey));
byte[] hashValue = hmacsha1.ComputeHash(ascEnc.GetBytes(strSrc));
hmacsha1.Clear();
return(Convert.ToBase64String(hashValue));
}
public string Execute(string signingString)
{
if (string.IsNullOrEmpty(signingString))
{
throw new ArgumentException("signingString");
}
var hmac = new HMACSHA1(Encoding.GetBytes(SharedSecret));
var mac = Convert.ToBase64String(hmac.ComputeHash(Encoding.GetBytes(signingString)));
hmac.Clear();
return(mac);
}
/// <summary>
/// Authenticate packet and return authentication parameters value to the caller
/// </summary>
/// <param name="authenticationSecret">User authentication secret</param>
/// <param name="engineId">SNMP agent authoritative engine id</param>
/// <param name="wholeMessage">Message to authenticate</param>
/// <returns>Authentication parameters value</returns>
public byte[] authenticate(byte[] authenticationSecret, byte[] engineId, byte[] wholeMessage)
{
var result = new byte[12];
var authKey = PasswordToKey(authenticationSecret, engineId);
var sha = new HMACSHA1(authKey);
var hash = sha.ComputeHash(wholeMessage);
// copy 12 bytes of the hash into the wholeMessage
for (var i = 0; i < 12; i++)
{
result[i] = hash[i];
}
sha.Clear(); // release resources
return(result);
}
public static string GetHamcSha1ToHexString(string content, Encoding contentEncoding, string key, Encoding keyEncoding)
{
HMACSHA1 hmacSha1 = new HMACSHA1(keyEncoding.GetBytes(key));
byte[] result = hmacSha1.ComputeHash(contentEncoding.GetBytes(content));
hmacSha1.Clear();
var hexStr = new StringBuilder();
foreach (byte b in result)
{
hexStr.Append(b.ToString("x2")); // to lower
}
return(hexStr.ToString());
}
public static string GetExpiringHMAC(string message, DateTime expiryDate)
{
HMAC alg = new HMACSHA1(Key);
try
{
string input = expiryDate.Ticks + message;
byte[] hashBytes = alg.ComputeHash(Encoding.UTF8.GetBytes(input));
byte[] result = new byte[8 + hashBytes.Length];
hashBytes.CopyTo(result, 8);
BitConverter.GetBytes(expiryDate.Ticks).CopyTo(result, 0);
return(Swap(Convert.ToBase64String(result), "+=/", "-_,"));
}
finally { alg.Clear(); }
}
/// <summary>
/// Verifies correct SHA-1 authentication of the frame. Prior to calling this method, you have to extract authentication
/// parameters from the wholeMessage and reset authenticationParameters field in the USM information block to 12 0x00
/// values.
/// </summary>
/// <param name="userPassword">User password</param>
/// <param name="engineId">Authoritative engine id</param>
/// <param name="authenticationParameters">Extracted USM authentication parameters</param>
/// <param name="wholeMessage">Whole message with authentication parameters zeroed (0x00) out</param>
/// <returns>True if message authentication has passed the check, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] userPassword, byte[] engineId, byte[] authenticationParameters, MutableByte wholeMessage)
{
byte[] authKey = PasswordToKey(userPassword, engineId);
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
MutableByte myhash = new MutableByte(hash, 12);
sha.Clear(); // release resources
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
/// <summary>
/// Authenticate packet and return authentication parameters value to the caller
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="wholeMessage">Message to authenticate</param>
/// <returns>Authentication parameters value</returns>
public byte[] authenticate(byte[] authKey, byte[] wholeMessage)
{
byte[] result = new byte[12];
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
// copy 12 bytes of the hash into the wholeMessage
for (int i = 0; i < 12; i++)
{
result[i] = hash[i];
}
sha.Clear(); // release resources
return(result);
}
/// <summary>
/// Computes the hash.
/// </summary>
/// <param name="version">The version.</param>
/// <param name="header">The header.</param>
/// <param name="parameters">The parameters.</param>
/// <param name="scopeBytes">The scope bytes.</param>
/// <param name="privacy">The privacy provider.</param>
/// <returns></returns>
private OctetString ComputeHash(VersionCode version, ISegment header, SecurityParameters parameters, ISnmpData scopeBytes, IPrivacyProvider privacy)
{
if (scopeBytes == null)
{
throw new ArgumentNullException("scopeBytes");
}
byte[] key = PasswordToKey(_password, parameters.EngineId.GetRaw());
using (HMACSHA1 sha1 = new HMACSHA1(key))
{
byte[] hash = sha1.ComputeHash(SnmpMessageExtension.PackMessage(version, header, parameters, scopeBytes, privacy).ToBytes());
sha1.Clear();
byte[] result = new byte[DigestLength];
Array.Copy(hash, result, result.Length);
return(new OctetString(result));
}
}
private string GetPolicyBase64(string key, string redirectTo, string contentType, string contentDisposition,
long maxUploadSize, out string sign)
{
var policyBuilder = new StringBuilder();
policyBuilder.AppendFormat("{{\"expiration\": \"{0}\",\"conditions\":[",
DateTime.UtcNow.AddMinutes(15).ToString(AWSSDKUtils.ISO8601DateFormat,
CultureInfo.InvariantCulture));
policyBuilder.AppendFormat("{{\"bucket\": \"{0}\"}},", _bucket);
policyBuilder.AppendFormat("[\"starts-with\", \"$key\", \"{0}\"],", key);
policyBuilder.Append("{\"acl\": \"public-read\"},");
if (!string.IsNullOrEmpty(redirectTo))
{
policyBuilder.AppendFormat("{{\"success_action_redirect\": \"{0}\"}},", redirectTo);
}
policyBuilder.AppendFormat("{{\"success_action_status\": \"{0}\"}},", 201);
if (!string.IsNullOrEmpty(contentType))
{
policyBuilder.AppendFormat("[\"eq\", \"$Content-Type\", \"{0}\"],", contentType);
}
if (!string.IsNullOrEmpty(contentDisposition))
{
policyBuilder.AppendFormat("[\"eq\", \"$Content-Disposition\", \"{0}\"],", contentDisposition);
}
policyBuilder.AppendFormat("[\"content-length-range\", 0, {0}]", maxUploadSize);
policyBuilder.Append("]}");
var policyBase64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(policyBuilder.ToString()));
//sign = AWSSDKUtils.HMACSign(policyBase64, _secretAccessKeyId, new HMACSHA1());
var algorithm = new HMACSHA1 {
Key = Encoding.UTF8.GetBytes(_secretAccessKeyId)
};
try
{
algorithm.Key = Encoding.UTF8.GetBytes(key);
sign = Convert.ToBase64String(algorithm.ComputeHash(Encoding.UTF8.GetBytes(policyBase64)));
}
finally
{
algorithm.Clear();
}
return(policyBase64);
}
/// <summary>
/// Verify SHA-1 authentication of a packet.
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="authenticationParameters">Authentication parameters extracted from the packet being authenticated</param>
/// <param name="wholeMessage">Entire packet being authenticated</param>
/// <returns>True on authentication success, otherwise false</returns>
public bool authenticateIncomingMsg(byte[] authKey, byte[] authenticationParameters, MutableByte wholeMessage)
{
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
MutableByte myhash = new MutableByte(hash, 12);
#if !NETCOREAPP11 && !NETSTANDARD15
sha.Clear(); // release resources
#else
sha.Dispose();
#endif
if (myhash.Equals(authenticationParameters))
{
return(true);
}
return(false);
}
/// <summary>
/// Authenticate packet and return authentication parameters value to the caller
/// </summary>
/// <param name="authKey">Authentication key (not password)</param>
/// <param name="wholeMessage">Message to authenticate</param>
/// <returns>Authentication parameters value</returns>
public byte[] authenticate(byte[] authKey, byte[] wholeMessage)
{
byte[] result = new byte[12];
HMACSHA1 sha = new HMACSHA1(authKey);
byte[] hash = sha.ComputeHash(wholeMessage);
// copy 12 bytes of the hash into the wholeMessage
for (int i = 0; i < 12; i++)
{
result[i] = hash[i];
}
#if !NETCOREAPP11 && !NETSTANDARD15
sha.Clear(); // release resources
#else
sha.Dispose();
#endif
return(result);
}
public static string Encriptar_PWD(string strTexto)
{
string sResult = "";
try
{
byte[] bKey = Encoding.UTF8.GetBytes(KeyMaster);
HMACSHA1 _objHMACSHA = new HMACSHA1(bKey);
byte[] bResult = _objHMACSHA.ComputeHash(Encoding.UTF8.GetBytes(strTexto));
sResult = Convert.ToBase64String(bResult);
_objHMACSHA.Clear();
}
catch (Exception ex)
{
sResult = "";
}
return(sResult);
}
private byte[] computeSignature(String baseString)
{
byte[] _key;
lock (this)
{
if (key == null)
{
String keyString = Rfc3986.Encode(getConsumerSecret())
+ "&" + Rfc3986.Encode(getTokenSecret());
key = Encoding.GetEncoding(ENCODING).GetBytes(keyString);
}
_key = key;
}
using (HMACSHA1 crypto = new HMACSHA1())
{
crypto.Key = _key;
byte[] hash = crypto.ComputeHash(Encoding.GetEncoding(ENCODING).GetBytes(baseString));
crypto.Clear();
return(hash);
}
}
public virtual void onButtonClick(object sender, EventArgs e) {
// The HMAC secret as configured in the skin
string hmacSecret = "TheHM4C$ecretF0rTheSk1n";
// Generate the signing string
string signingString = paymentAmount.Text + currencyCode.Text + shipBeforeDate.Text
+ merchantReference.Text + skinCode.Text + merchantAccount.Text
+ sessionValidity.Text + shopperEmail.Text;
// Values are always transferred using UTF-8 encoding
System.Text.UTF8Encoding encoding=new System.Text.UTF8Encoding();
// Calculate the HMAC
HMACSHA1 myhmacsha1 = new HMACSHA1(encoding.GetBytes(hmacSecret));
merchantSig.Text = System.Convert.ToBase64String(myhmacsha1.ComputeHash(encoding.GetBytes(signingString)));
myhmacsha1.Clear();
// Ready to pay
button1.Text = "Pay";
}
public string EncodeFile(string stringkey, String input)
{
byte[] key = Encoding.UTF8.GetBytes(stringkey);
// Initialize the keyed hash object.
HMACSHA1 myhmacsha1 = new HMACSHA1(key);
byte[] inStream1 = Encoding.UTF8.GetBytes(input);// Convert.FromBase64String(input);
MemoryStream inStream = new MemoryStream();
//MemoryStream outStream = new MemoryStream();
// FileStream inStream = new FileStream(sourceFile, FileMode.Open);
//FileStream outStream = new FileStream(destFile, FileMode.Create);
// Compute the hash of the input file.
byte[] hashValue = myhmacsha1.ComputeHash(inStream1);
// Reset inStream to the beginning of the file.
//inStream.Position = 0;
string rv = Convert.ToBase64String(hashValue);
// Write the computed hash value to the output file.
//outStream.Write(hashValue, 0, hashValue.Length);
//StreamReader reader = new StreamReader(outStream);
//string rv = reader.ReadToEnd();
myhmacsha1.Clear();
// Close the streams
inStream.Close();
//state += "orig sig" + rv;
//outStream.Close();
//string safeRv = MakeUrlSafe(rv);
//state += " safe sig" + safeRv;
return(rv);
//return safeRv;
} // end EncodeFile
} //compute hash from arguments and return hash value as string
private static string GetHMACSHA1Hash(string text)
{
//create variables for computing hash and making it a string
UnicodeEncoding UniCode = new UnicodeEncoding();
byte[] HashResult;
byte[] msg = UniCode.GetBytes(text);
HMACSHA1 hashString = new HMACSHA1();
string Str = "";
//compute hash with HMACSHA1 module and format output as string
//convert bytes in HashResult to string values
HashResult = hashString.ComputeHash(msg);
foreach (byte x in HashResult)
{
Str += String.Format("{0:x2}", x);
}
//clear excess resource usage
hashString.Clear();
return(Str);
} //compute hash from arguments and return hash value as string
/// <summary>
/// Computes the hash.
/// </summary>
/// <param name="buffer"></param>
/// <param name="engineId"></param>
/// <returns></returns>
public OctetString ComputeHash(byte[] buffer, OctetString engineId)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (engineId == null)
{
throw new ArgumentNullException("engineId");
}
var key = PasswordToKey(_password, engineId.GetRaw());
using (var sha1 = new HMACSHA1(key))
{
var hash = sha1.ComputeHash(buffer);
sha1.Clear();
var result = new byte[DigestLength];
Buffer.BlockCopy(hash, 0, result, 0, result.Length);
return(new OctetString(result));
}
}
static string MakeOAuthSignature(string compositeSigningKey, string signatureBase)
{
using (HMACSHA1 crypto = new HMACSHA1())
{
byte[] bkey = Encoding.ASCII.GetBytes(compositeSigningKey);
// Keys longer than 60 characters aparently do not work with OpenNetCF...
if (bkey.Length > 60)
{
bkey = (new System.Security.Cryptography.SHA1CryptoServiceProvider()).ComputeHash(bkey);
}
crypto.Key = bkey;
string hash = Convert.ToBase64String(crypto.ComputeHash(Encoding.ASCII.GetBytes(signatureBase)));
crypto.Clear();
return hash;
}
}
