/// <summary>
/// A method is used to validate the signed data by using specified public key.
/// </summary>
/// <param name="signedData">A parameter represents the signed data which will be validate.</param>
/// <param name="originalData">A parameter represents the original data which is used to execute the validation.</param>
/// <param name="publicKeyBlob">A parameter represents the binaries data of the public key part of a unique key-pairs.</param>
/// <returns>Return 'true' indicating the signed data pass the validation.</returns>
private static bool VerifySignedData(byte[] signedData, byte[] originalData, byte[] publicKeyBlob)
{
if (null == signedData || 0 == signedData.Length)
{
throw new ArgumentNullException("signedData");
}
if (null == originalData || 0 == originalData.Length)
{
throw new ArgumentNullException("originalData");
}
if (null == publicKeyBlob || 0 == publicKeyBlob.Length)
{
throw new ArgumentNullException("publicKeyBlob");
}
using (RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider())
{
rsaProvider.ImportCspBlob(publicKeyBlob);
SHA256Managed sha = new SHA256Managed();
bool result = rsaProvider.VerifyData(originalData, sha, signedData);
sha.Dispose();
return(result);
}
}
public static string ComputeHash(string text, string salt, HashAlgo hashType)
{
byte[] bytes = ASCIIEncoding.UTF8.GetBytes(text + salt);
byte[] hash = null;
switch (hashType)
{
case HashAlgo.SHA256:
SHA256Managed sha256 = new SHA256Managed();
hash = sha256.ComputeHash(bytes);
sha256.Dispose();
break;
case HashAlgo.SHA384:
SHA384Managed sha384 = new SHA384Managed();
hash = sha384.ComputeHash(bytes);
sha384.Dispose();
break;
case HashAlgo.SHA512:
SHA512Managed sha512 = new SHA512Managed();
hash = sha512.ComputeHash(bytes);
sha512.Dispose();
break;
}
return(Convert.ToBase64String(hash));
}
// theres two verify hash cuz i forgot which one can work or both cannot work. u just try!!
public static string verifyyyByteHash(string password, byte[] saltBytes)
{
byte[] passwordTextBytes = Encoding.UTF8.GetBytes(password);
//allocate array that will handle Password + salt size
byte[] passwordTextBytesWithSalt = new byte[passwordTextBytes.Length + saltBytes.Length];
for (int i = 0; i < passwordTextBytes.Length; i++)
{
passwordTextBytesWithSalt[i] = passwordTextBytes[i];
}
//append salt bytes to resulting array
for (int i = 0; i < saltBytes.Length; i++)
{
passwordTextBytesWithSalt[passwordTextBytes.Length + i] = saltBytes[i];
}
HashAlgorithm hash;
hash = new SHA256Managed();
byte[] hashBytes = hash.ComputeHash(passwordTextBytesWithSalt);
hash.Dispose();
byte[] hashWithSaltBytes = new byte[hashBytes.Length + saltBytes.Length];
for (int i = 0; i < hashBytes.Length; i++)
{
hashWithSaltBytes[i] = hashBytes[i];
}
for (int i = 0; i < saltBytes.Length; i++)
{
hashWithSaltBytes[hashBytes.Length + i] = saltBytes[i];
}
string hashValue = Convert.ToBase64String(hashWithSaltBytes);
string salt = Encoding.UTF8.GetString(saltBytes);
return(hashValue + "," + salt);
}
private static string SHA256Text(Encoding encoding, string content)
{
if (string.IsNullOrEmpty(content))
{
throw new ArgumentNullException("content is null");
}
string strRet = string.Empty;
SHA256 sha = null;
try
{
sha = new SHA256Managed();
byte[] buffContent = encoding.GetBytes(content);
byte[] buff = sha.ComputeHash(buffContent);
strRet = FormatByteArray(buff);
}
catch
{
throw;
}
finally
{
if (null != sha)
{
sha.Dispose();
sha = null;
}
}
return(strRet);
}
public static string SHA256(Stream stream)
{
if (null == stream)
{
throw new ArgumentNullException("stream is null");
}
string strRet = string.Empty;
SHA256 sha = null;
try
{
sha = new SHA256Managed();
stream.Seek(0, SeekOrigin.Begin);
byte[] buff = sha.ComputeHash(stream);
strRet = FormatByteArray(buff);
}
catch
{
throw;
}
finally
{
if (null != sha)
{
sha.Dispose();
sha = null;
}
}
return(strRet);
}
public static string Encrypt(string password, string salt)
{
if (salt == null)
{
salt = "";
}
byte[] plainData = ASCIIEncoding.UTF8.GetBytes(password);
byte[] saltData = ASCIIEncoding.UTF8.GetBytes(salt);
byte[] plainDataAndSalt = new byte[plainData.Length + salt.Length];
for (int x = 0; x < plainData.Length; x++)
{
plainDataAndSalt[x] = plainData[x];
}
for (int n = 0; n < saltData.Length; n++)
{
plainDataAndSalt[plainData.Length + n] = saltData[n];
}
byte[] hashValue = null;
SHA256Managed sha = new SHA256Managed();
hashValue = sha.ComputeHash(plainDataAndSalt);
sha.Dispose();
return(Convert.ToBase64String(hashValue));
}
public static String sha256(String s)
{
try
{
SHA256Managed crypt = new SHA256Managed();
Byte[] crypto = crypt.ComputeHash(Encoding.UTF8.GetBytes(s), 0, Encoding.UTF8.GetByteCount(s));
crypt.Clear();
crypt.Dispose();
StringBuilder hash = new StringBuilder();
foreach (Byte x in crypto)
{
hash.Append(x.ToString("x2"));
}
LastLogMsg = null;
return(hash.ToString());
}
catch (Exception ex)
{
#if DEBUG
Console.WriteLine(ex.Message + " " + ex.StackTrace);
#endif
LastLogMsg = "Unhandled Exception!";
return(null);
}
}
public EncryptSettingsProvider()
{
//read settings from configuration
var useHashingString = ConfigurationManager.AppSettings["UseHashingForEncryption"];
var useHashing = System.String.Compare(useHashingString, "false", System.StringComparison.OrdinalIgnoreCase) != 0;
_encryptionPrefix = ConfigurationManager.AppSettings["EncryptionPrefix"];
if (string.IsNullOrWhiteSpace(_encryptionPrefix))
{
_encryptionPrefix = "encryptedHidden_";
}
var key = ConfigurationManager.AppSettings["EncryptionKey"];
if (useHashing)
{
var hash = new SHA256Managed();
_encryptionKey = hash.ComputeHash(Encoding.UTF8.GetBytes(key));
hash.Clear();
hash.Dispose();
}
else
{
_encryptionKey = Encoding.UTF8.GetBytes(key);
}
}
public static string GetSha256String(byte[] buffer)
{
SHA256 sha512 = new SHA256Managed();
byte[] retVal = sha512.ComputeHash(buffer); //计算指定Stream 对象的哈希值
sha512.Dispose();
return(BitConverter.ToString(retVal).Replace("-", ""));
}
private void Dispose(bool disposing)
{
_isDisposed = true;
if (disposing)
{
_hasher.Dispose();
}
}
public static string GenerateHash(string input, string salt)
{
byte[] bytes = Encoding.UTF8.GetBytes(input + salt);
SHA256Managed sHA256ManagedString = new SHA256Managed();
byte[] hash = sHA256ManagedString.ComputeHash(bytes);
sHA256ManagedString.Dispose();
return(Convert.ToBase64String(hash));
}
/// <summary>
/// RSA签名
/// </summary>
/// <param name="InOutParaType">输出的字符串类型</param>
/// <param name="PrivateKey">私钥</param>
/// <param name="HashbyteSignStr">待签名Hash字符串值</param>
/// <param name="HashAlgorithmType">签名算法</param>
/// <param name="Encode">字符串编码</param>
public static string CreateRSASign(SafeHelper.EncryptionHelper.InOutParaType InOutParaType, string HashbyteSignStr, string PrivateKey, RSASignHashAlgorithmType HashAlgorithmType, Encoding Encode)
{
try
{
byte[] Buffer = Encode.GetBytes(HashbyteSignStr);
byte[] HashbyteSign;
switch (HashAlgorithmType)
{
case RSASignHashAlgorithmType.SHA1:
SHA1Managed sha1 = new SHA1Managed();
HashbyteSign = sha1.ComputeHash(Buffer);
sha1.Dispose();
break;
case RSASignHashAlgorithmType.SHA256:
SHA256Managed sha2 = new SHA256Managed();
HashbyteSign = sha2.ComputeHash(Buffer);
sha2.Dispose();
break;
default:
HashAlgorithm MD5 = HashAlgorithm.Create("MD5");
HashbyteSign = MD5.ComputeHash(Buffer);
MD5.Dispose();
break;
}
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.FromXmlString(PrivateKey);
RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法
RSAFormatter.SetHashAlgorithm(HashAlgorithmType.ToString());
//执行签名
byte[] RSASignbyte = RSAFormatter.CreateSignature(HashbyteSign);
RSA.Dispose();
switch (InOutParaType)
{
case SafeHelper.EncryptionHelper.InOutParaType.Str16:
return(BitConverter.ToString(RSASignbyte).Replace("-", string.Empty).ToUpper());
case SafeHelper.EncryptionHelper.InOutParaType.Base64:
return(Convert.ToBase64String(RSASignbyte));
default:
return(string.Empty);
}
}
catch (Exception ex)
{
throw ex;
}
}
public string calculHash(string emailAddress)
{
byte[] plainData = ASCIIEncoding.UTF8.GetBytes(emailAddress);
byte[] hashValue = null;
SHA256Managed sha = new SHA256Managed();
hashValue = sha.ComputeHash(plainData);
sha.Dispose();
return(Convert.ToBase64String(hashValue));
}
void SHA256()
{
SHA256 shaM = new SHA256Managed();
result = shaM.ComputeHash(data);
ConsoleResult("SHA256");
shaM.Dispose();
}
protected override void Dispose(bool disposing)
{
System.Buffers.ArrayPool <byte> .Shared.Return(_Buffer);
if (disposing)
{
sha.Dispose();
}
base.Dispose(disposing);
}
/// <summary>
/// Encrypt a bit array.
/// </summary>
/// <param name="byteArray">Byte array to encrypt.</param>
/// <returns>Bit array ciphered.</returns>
public byte[] Encrypt(ref byte[] byteArray)
{
byte[] result = null;
if (Type == CipherType.TripleDES)
{
if (IsTripleCapable())
{
ICryptoTransform transform = null;
try
{
transform = GetTripleDES().CreateEncryptor();
result = transform.TransformFinalBlock(byteArray, 0, byteArray.Length);
}
catch (Exception ex)
{
throw new PulsarException(typeof(Cipher).FullName, Pulsar.Toolkit.Resources.Exceptions.Cipher.TripleEncryptFailed, ex);
}
finally
{
if (transform != null)
{
transform.Dispose();
}
}
}
else
{
ThrowTripleParamException();
}
}
else
{
SHA256Managed sha = null;
try
{
sha = new SHA256Managed();
result = sha.ComputeHash(byteArray);
}
catch (Exception ex)
{
throw new PulsarException(typeof(Cipher).FullName, Pulsar.Toolkit.Resources.Exceptions.Cipher.SHA256EncryptFailed, ex);
}
finally
{
if (sha != null)
{
sha.Dispose();
}
}
}
return(result);
}
/* SHA256-hasing wordt hier gebruikt */
public static string ComputeHash(string plainText, byte[] salt)
{
const int minSaltLength = 4;
const int maxSaltLength = 16;
byte[] saltBytes = null;
if (salt != null)
{
saltBytes = salt;
}
else
{
Random rand = new Random();
int saltLength = rand.Next(minSaltLength, maxSaltLength);
saltBytes = new byte[saltLength];
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
rng.GetNonZeroBytes(saltBytes);
rng.Dispose();
}
byte[] plainData = ASCIIEncoding.UTF8.GetBytes(plainText);
byte[] plainDataAndSalt = new byte[plainData.Length + saltBytes.Length];
for (int i = 0; i < plainData.Length; i++)
{
plainDataAndSalt[i] = plainData[i];
}
for (int i = 0; i < saltBytes.Length; i++)
{
plainDataAndSalt[plainData.Length + i] = saltBytes[i];
}
SHA256Managed sha = new SHA256Managed();
byte[] hashValue = sha.ComputeHash(plainDataAndSalt);
sha.Dispose();
byte[] result = new byte[hashValue.Length + saltBytes.Length];
for (int i = 0; i < hashValue.Length; i++)
{
result[i] = hashValue[i];
}
for (int i = 0; i < saltBytes.Length; i++)
{
result[hashValue.Length + i] = saltBytes[i];
}
return(Convert.ToBase64String(result));
}
/// <summary>
///
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
public static string GetSha256String(byte[] buffer)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
SHA256 sha256 = new SHA256Managed();
byte[] retVal = sha256.ComputeHash(buffer); //计算指定Stream 对象的哈希值
sha256.Dispose();
return(BitConverter.ToString(retVal).Replace("-", ""));
}
/// <summary>
/// SHA256 Hash of the SSN, pass in the full 9 or the last 4
/// </summary>
/// <param name="ssn"></param>
/// <returns>Hashed version of SSN passed in</returns>
public byte[] HashSSN(string ssn)
{
byte[] hashedSSN = null;
SHA256 shaM = new SHA256Managed();
//Using UTF8 because this only contains ASCII text
hashedSSN = shaM.ComputeHash(Encoding.UTF8.GetBytes(ssn));
shaM.Dispose();
return(hashedSSN);
}
public static string ComputeHash(string plainText,
byte[] saltBytes)
{
// Convert plain text into a byte array.
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
// Allocate array, which will hold plain text and salt.
byte[] plainTextWithSaltBytes =
new byte[plainTextBytes.Length + saltBytes.Length];
// Copy plain text bytes into resulting array.
for (int i = 0; i < plainTextBytes.Length; i++)
{
plainTextWithSaltBytes[i] = plainTextBytes[i];
}
// Append salt bytes to the resulting array.
for (int i = 0; i < saltBytes.Length; i++)
{
plainTextWithSaltBytes[plainTextBytes.Length + i] = saltBytes[i];
}
SHA256Managed hash = new SHA256Managed();
// Compute hash value of the plain text with appended salt.
byte[] hashBytes = hash.ComputeHash(plainTextWithSaltBytes);
// Create array which will hold hash and original salt bytes.
byte[] hashWithSaltBytes = new byte[hashBytes.Length +
saltBytes.Length];
// Copy hash bytes into resulting array.
for (int i = 0; i < hashBytes.Length; i++)
{
hashWithSaltBytes[i] = hashBytes[i];
}
// Append salt bytes to the result.
for (int i = 0; i < saltBytes.Length; i++)
{
hashWithSaltBytes[hashBytes.Length + i] = saltBytes[i];
}
// Convert result into a base64-encoded string.
string hashValue = Convert.ToBase64String(hashWithSaltBytes);
hash.Dispose();
// Return the result.
return(hashValue);
}
public static string ComputeHash(string plainText, Supported_HA hash, byte[] salt)
{
int minSaltLength = 4, maxSaltLength = 16;
byte[] saltBytes = null;
if (salt != null)
{
saltBytes = salt;
}
else
{
Random r = new Random();
int SaltLength = r.Next(minSaltLength, maxSaltLength);
saltBytes = new byte[SaltLength];
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
rng.GetNonZeroBytes(saltBytes);
rng.Dispose();
}
byte[] plainData = ASCIIEncoding.UTF8.GetBytes(plainText);
byte[] plainDataWithSalt = new byte[plainData.Length + saltBytes.Length];
for (int x = 0; x < plainData.Length; x++)
{
plainDataWithSalt[x] = plainData[x];
}
for (int n = 0; n < saltBytes.Length; n++)
{
plainDataWithSalt[plainData.Length + n] = saltBytes[n];
}
byte[] hashValue = null;
SHA256Managed sha = new SHA256Managed();
hashValue = sha.ComputeHash(plainDataWithSalt);
sha.Dispose();
byte[] result = new byte[hashValue.Length + saltBytes.Length];
for (int x = 0; x < hashValue.Length; x++)
{
result[x] = hashValue[x];
}
for (int n = 0; n < saltBytes.Length; n++)
{
result[hashValue.Length + n] = saltBytes[n];
}
return(Convert.ToBase64String(result));
}
public string ComputeHash(string plainText, SupportedHash hash, byte[] salt)
{
byte[] plainData = Encoding.UTF8.GetBytes(plainText);
byte[] plainDataWithSalt = new byte[plainData.Length + salt.Length];
for (int x = 0; x < plainData.Length; x++)
{
plainDataWithSalt[x] = plainData[x];
}
for (int n = 0; n < salt.Length; n++)
{
plainDataWithSalt[plainData.Length + n] = salt[n];
}
byte[] hashValue = null;
switch (hash)
{
case SupportedHash.SHA256:
SHA256Managed sha = new SHA256Managed();
hashValue = sha.ComputeHash(plainDataWithSalt);
sha.Dispose();
break;
case SupportedHash.SHA384:
SHA384Managed sha1 = new SHA384Managed();
hashValue = sha1.ComputeHash(plainDataWithSalt);
sha1.Dispose();
break;
case SupportedHash.SHA512:
SHA512Managed sha2 = new SHA512Managed();
hashValue = sha2.ComputeHash(plainDataWithSalt);
sha2.Dispose();
break;
}
byte[] result = new byte[hashValue.Length + salt.Length];
for (int x = 0; x < hashValue.Length; x++)
{
result[x] = hashValue[x];
}
for (int n = 0; n < salt.Length; n++)
{
result[hashValue.Length + n] = salt[n];
}
return(Convert.ToBase64String(result));
}
/// <summary>
///
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
public static byte[] GetSha256Bytes(byte[] buffer)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
SHA256 sha256 = new SHA256Managed();
byte[] retVal = sha256.ComputeHash(buffer); //计算指定Stream 对象的哈希值
sha256.Dispose();
return(retVal);
}
/// <summary>
/// SHA256加密 哈希加密一个字符串 生成64位字符串
/// </summary>
/// <param name="Security"></param>
/// <returns></returns>
public static string SHA256String(string encodingString)
{
byte[] msg = Encoding.UTF8.GetBytes(encodingString);
SHA256Managed Arithmetic = new SHA256Managed();
byte[] Value = Arithmetic.ComputeHash(msg);
StringBuilder sb = new StringBuilder();
foreach (byte o in Value)
{
sb.Append(o.ToString("X2"));
}
Arithmetic.Dispose();
return(sb.ToString());
}
private string GetHash(string data)
{
var message = Encoding.ASCII.GetBytes(data);
SHA256Managed hashString = new SHA256Managed();
string hex = "";
var hashValue = hashString.ComputeHash(message);
foreach (byte x in hashValue)
{
hex += string.Format("{0:x2}", x);
}
hashString.Dispose();
return(hex);
}
/// <summary>
/// Signs data using the provided private key.
/// </summary>
/// <param name="dataToSign">The data to be signed.</param>
/// <param name="privateKey">The private key.</param>
/// <returns>The signature of the data as signed by the private key.</returns>
public EncryptionData Sign(EncryptionData dataToSign, RsaPrivateKey privateKey)
{
var rsa = GetRsaProvider();
rsa.ImportParameters(Check.NotNull(privateKey, nameof(privateKey)).ToParameters());
var hash = new SHA256Managed();
var sig = rsa.SignData(Check.NotNull(dataToSign, nameof(dataToSign)).Bytes, hash);
rsa.Clear();
rsa.Dispose();
hash.Dispose();
return(new EncryptionData(sig));
}
/// <summary>
/// Retorna um hash a partir dos dados fornecidos.
/// </summary>
/// <param name="data">dados a serem computados</param>
/// <returns></returns>
public string Compute(string data)
{
var sha = new SHA256Managed();
var hash = new StringBuilder();
byte[] buffer = sha.ComputeHash(Encoding.ASCII.GetBytes(data));
foreach (var bytes in buffer)
{
hash.Append(bytes.ToString("x2"));
}
sha.Dispose();
return(hash.ToString());
}
public string GetPasswordHashValue(string plainPassword)
{
byte[] password = Encoding.UTF8.GetBytes(plainPassword);
SHA256Managed sha = new SHA256Managed();
byte[] hashedPasword = sha.ComputeHash(password);
sha.Dispose();
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < hashedPasword.Length; i++)
{
stringBuilder.Append(hashedPasword[i].ToString("x2"));
}
return(stringBuilder.ToString());
}
public static string ComputePasswordHash(string plainText)
{
// Convert plain text into a byte array.
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
SHA256Managed hash = new SHA256Managed();
// Compute hash value of the plain text with appended salt.
byte[] hashBytes = hash.ComputeHash(plainTextBytes);
// Convert result into a base64-encoded string.
string hashValue = Convert.ToBase64String(hashBytes);
hash.Dispose();
return(hashValue);
}
/// <summary>
/// Compute Hash using SHA-256 and a random salt of length 15 bytes
/// </summary>
/// <param name="text">Text to be hashed</param>
/// <param name="salt">Optional salt to be used for the hashing</param>
/// <returns>array of bytes, the hash with the salt appended to it</returns>
public static byte[] ComputeHash(string text, byte[] salt = null)
{
byte[] saltBytes = null;
if (salt != null)
{
saltBytes = salt;
}
else
{
int SaltLength = 15;
saltBytes = new byte[SaltLength];
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
rng.GetNonZeroBytes(saltBytes);
rng.Dispose();
}
byte[] plainData = Encoding.UTF8.GetBytes(text);
byte[] plainDataWithSalt = new byte[plainData.Length + saltBytes.Length];
for (int x = 0; x < plainData.Length; x++)
{
plainDataWithSalt[x] = plainData[x];
}
for (int n = 0; n < saltBytes.Length; n++)
{
plainDataWithSalt[plainData.Length + n] = saltBytes[n];
}
byte[] hashValue = null;
SHA256Managed sha = new SHA256Managed();
hashValue = sha.ComputeHash(plainDataWithSalt);
sha.Dispose();
byte[] result = new byte[hashValue.Length + saltBytes.Length];
for (int x = 0; x < hashValue.Length; x++)
{
result[x] = hashValue[x];
}
for (int n = 0; n < saltBytes.Length; n++)
{
result[hashValue.Length + n] = saltBytes[n];
}
return(result);
}
