/// <summary>
/// Generates a signature using the specified signatureType
/// </summary>
/// <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
/// <param name="consumerKey">The consumer key</param>
/// <param name="consumerSecret">The consumer seceret</param>
/// <param name="token">The token, if available. If not available pass null or an empty string</param>
/// <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
/// <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
/// <param name="signatureType">The type of signature to use</param>
/// <returns>A base64 string of the hash value</returns>
public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, SignatureTypes signatureType, out string normalizedUrl, out string normalizedRequestParameters)
{
normalizedUrl = null;
normalizedRequestParameters = null;
switch (signatureType)
{
case SignatureTypes.PLAINTEXT:
return(Uri.EscapeDataString(string.Format("{0}&{1}", consumerSecret, tokenSecret)));
case SignatureTypes.HMACSHA1:
string signatureBase = GenerateSignatureBase(url, consumerKey, token, tokenSecret, httpMethod, timeStamp, nonce, HMACSHA1SignatureType, out normalizedUrl, out normalizedRequestParameters);
MacAlgorithmProvider hmacsha1 = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
//HMACSHA1 hmacsha1 = new HMACSHA1();
// Create a key to be signed with the message.
BinaryStringEncoding encoding = BinaryStringEncoding.Utf8;
IBuffer buffKeyMaterial = CryptographicBuffer.ConvertStringToBinary(string.Format("{0}&{1}", UrlEncode(consumerSecret), string.IsNullOrEmpty(tokenSecret) ? "" : UrlEncode(tokenSecret)), encoding);
CryptographicKey hmacKey = hmacsha1.CreateKey(buffKeyMaterial);
return(GenerateSignatureUsingHash(signatureBase, hmacsha1, hmacKey));
case SignatureTypes.RSASHA1:
throw new NotImplementedException();
default:
throw new ArgumentException("Unknown signature type", "signatureType");
}
}
/*
* 计算 HMAC-SHA1
*/
public static String HMACSha1(String data, String key)
{
String result = "";
//使用CodePagesEncodingProvider去注册扩展编码。
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
//注册GBK编码
Encoding encodingGbk = Encoding.GetEncoding("GBK");
byte[] dataByte = encodingGbk.GetBytes(data);
byte[] keyByte = encodingGbk.GetBytes(key);
byte[] DataBt = encodingGbk.GetBytes(data);
byte[] KeyBt = encodingGbk.GetBytes(key);
data = Encoding.UTF8.GetString(DataBt);
key = Encoding.UTF8.GetString(KeyBt);
string SHA1Name = MacAlgorithmNames.HmacSha1;
IBuffer buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(data, BinaryStringEncoding.Utf8);
IBuffer buffKeyMaterial = CryptographicBuffer.ConvertStringToBinary(key, BinaryStringEncoding.Utf8);
MacAlgorithmProvider objMacProv = MacAlgorithmProvider.OpenAlgorithm(SHA1Name);
CryptographicKey hmacKey = objMacProv.CreateKey(buffKeyMaterial);
IBuffer buffHMAC = CryptographicEngine.Sign(hmacKey, buffUtf8Msg);
byte[] hashValue = Buffer2Bytes(buffHMAC);
result = Convert.ToBase64String(hashValue);
return(result);
}
public string HMACSign(byte[] data, string key, SigningAlgorithm algorithmName)
{
var crypt = MacAlgorithmProvider.OpenAlgorithm(ConvertToAlgorithName(algorithmName));
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException("key", "Please specify a Secret Signing Key.");
}
if (data == null || data.Length == 0)
{
throw new ArgumentNullException("data", "Please specify data to sign.");
}
if (null == crypt)
{
throw new ArgumentNullException("algorithm", "Please specify a KeyedHashAlgorithm to use.");
}
IBuffer dataBuffer = CryptographicBuffer.CreateFromByteArray(data);
var keyBuffer = CryptographicBuffer.ConvertStringToBinary(key, BinaryStringEncoding.Utf8);
var cryptoKey = crypt.CreateKey(keyBuffer);
var sigBuffer = CryptographicEngine.Sign(cryptoKey, dataBuffer);
string signature = CryptographicBuffer.EncodeToBase64String(sigBuffer);
return(signature);
}
public byte[] HMACSignBinary(byte[] data, byte[] key, SigningAlgorithm algorithmName)
{
var crypt = MacAlgorithmProvider.OpenAlgorithm(ConvertToAlgorithName(algorithmName));
if (key == null || key.Length == 0)
{
throw new ArgumentNullException("key", "Please specify a Secret Signing Key.");
}
if (data == null || data.Length == 0)
{
throw new ArgumentNullException("data", "Please specify data to sign.");
}
if (null == crypt)
{
throw new ArgumentNullException("algorithm", "Please specify a KeyedHashAlgorithm to use.");
}
IBuffer dataBuffer = CryptographicBuffer.CreateFromByteArray(data);
var keyBuffer = CryptographicBuffer.CreateFromByteArray(key);
var cryptoKey = crypt.CreateKey(keyBuffer);
var sigBuffer = CryptographicEngine.Sign(cryptoKey, dataBuffer);
return(sigBuffer.ToArray());
}
/// <summary>
/// Create a HmacSha256 encoded string. Windows IoT/WP is missing the default methods (System.Security.Cryptography.HMACSHA256)
/// </summary>
/// <param name="SecretKey">The secret key used to encrypt the provided string</param>
/// <param name="Value">The value to be encrypted</param>
/// <returns></returns>
private string HmacSha256(string SecretKey, string Value)
{
// Move strings to buffers.
// IoT SAS keys needs a different key convertion (??)
IBuffer key = null;
switch (EventHubType)
{
case EventHubType.IoTHub:
key = Convert.FromBase64String(SecretKey).AsBuffer();
break;
default:
key = CryptographicBuffer.ConvertStringToBinary(SecretKey, BinaryStringEncoding.Utf8);
break;
}
var msg = CryptographicBuffer.ConvertStringToBinary(Value, BinaryStringEncoding.Utf8);
// Create HMAC.
var objMacProv = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
var hash = objMacProv.CreateHash(key);
hash.Append(msg);
return(CryptographicBuffer.EncodeToBase64String(hash.GetValueAndReset()));
}
void CreateHMAC(String strMsg, String strAlgName, out IBuffer buffMsg, out CryptographicKey hmacKey, out IBuffer buffHMAC)
{
// Create a MacAlgorithmProvider object for the specified algorithm.
MacAlgorithmProvider objMacProv = MacAlgorithmProvider.OpenAlgorithm(strAlgName);
// Demonstrate how to retrieve the name of the algorithm used.
String strNameUsed = objMacProv.AlgorithmName;
// Create a buffer that contains the message to be signed.
BinaryStringEncoding encoding = BinaryStringEncoding.Utf8;
buffMsg = CryptographicBuffer.ConvertStringToBinary(strMsg, encoding);
// Create a key to be signed with the message.
IBuffer buffKeyMaterial = CryptographicBuffer.GenerateRandom(objMacProv.MacLength);
hmacKey = objMacProv.CreateKey(buffKeyMaterial);
// Sign the key and message together.
buffHMAC = CryptographicEngine.Sign(hmacKey, buffMsg);
// Verify that the HMAC length is correct for the selected algorithm
if (buffHMAC.Length != objMacProv.MacLength)
{
throw new Exception("Error computing digest");
}
}
/// <summary>
/// SignRequest
/// </summary>
/// <param name="request"></param>
/// <param name="body"></param>
/// <returns></returns>
public string SignRequest(System.Net.HttpWebRequest request, byte[] body)
{
Uri u = request.RequestUri;
var algorithm = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithm.HmacSha1);
CryptographicHash hasher = algorithm.CreateHash(secretKey);
hasher.Append(body);
byte[] mac = hasher.GetValueAndReset();
string macBase64 = Convert.ToBase64String(mac);
string pathAndQuery = request.RequestUri.PathAndQuery;
byte[] pathAndQueryBytes = Config.Encoding.GetBytes(pathAndQuery);
using (MemoryStream buffer = new MemoryStream())
{
buffer.Write(pathAndQueryBytes, 0, pathAndQueryBytes.Length);
buffer.WriteByte((byte)'\n');
if (body.Length > 0)
{
buffer.Write(body, 0, body.Length);
}
hasher.Dispose();
return(this.accessKey + ":" + macBase64);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MailKit.Security.KeyedHashAlgorithm"/> class.
/// </summary>
/// <remarks>
/// Creates a new keyed hash algorithm context.
/// </remarks>
/// <param name="algorithm">The MAC algorithm name.</param>
/// <param name="key">The secret key.</param>
protected KeyedHashAlgorithm(string algorithm, byte[] key)
{
var mac = MacAlgorithmProvider.OpenAlgorithm(algorithm);
var buf = CryptographicBuffer.CreateFromByteArray(key);
hmac = mac.CreateHash(buf);
}
private static bool VerifyHMAC(IBuffer data, IBuffer hmacKeyBuffer, IBuffer hmac)
{
var provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
var key = provider.CreateKey(hmacKeyBuffer);
return(CryptographicEngine.VerifySignature(key, data, hmac));
}
private static IBuffer ComputeHMAC(IBuffer data, IBuffer hmacKeyBuffer)
{
var provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
var key = provider.CreateKey(hmacKeyBuffer);
return(CryptographicEngine.Sign(key, data));
}
private static byte[] ComputeHmacSha1Hash(byte[] data, byte[] key)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
//https://channel9.msdn.com/Forums/TechOff/Porting-to-WinRT/4df7586e1ef5400682eda00f0143b610
MacAlgorithmProvider macAlgorithmProvider = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
//BinaryStringEncoding encoding = BinaryStringEncoding.Utf8;
CryptographicKey hmacKey = macAlgorithmProvider.CreateKey(key.AsBuffer());
IBuffer signedMessage = CryptographicEngine.Sign(hmacKey, data.AsBuffer());
//var hashedString = CryptographicBuffer.EncodeToBase64String(signedMessage);
return(signedMessage.ToArray());
////using (var crypto = new System.Security.Cryptography.HMACSHA1(key))
////{
//// return crypto.ComputeHash(data);
////}
}
public SHA1(byte[] hmacKey)
{
MacAlgorithmProvider hmacSha1Provider = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
var materialKey = CryptographicBuffer.CreateFromByteArray(hmacKey);
macKey = hmacSha1Provider.CreateKey(materialKey);
}
/// <summary>
/// Calculates OTPs
/// </summary>
static long HmacSha1(byte[] key, byte[] value)
{
MacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha1);
IBuffer keyMaterial = CryptographicBuffer.CreateFromByteArray(key);
var cKey = provider.CreateKey(keyMaterial);
byte[] hmacComputedHash;
IBuffer data = CryptographicBuffer.CreateFromByteArray(value);
IBuffer buffer = CryptographicEngine.Sign(cKey, data);
CryptographicBuffer.CopyToByteArray(buffer, out hmacComputedHash);
// The RFC has a hard coded index 19 in this value.
// This is the same thing but also accomodates SHA256 and SHA512
// hmacComputedHash[19] => hmacComputedHash[hmacComputedHash.Length - 1]
int offset = hmacComputedHash[hmacComputedHash.Length - 1] & 0xF;
return
((hmacComputedHash[offset] & 0x7f) << 24
| (hmacComputedHash[offset + 1]) << 16
| (hmacComputedHash[offset + 2]) << 8
| (hmacComputedHash[offset + 3]));
}
private byte[] Hi()
{
var prev = new byte[20];
// Add 1 to the end of salt with most significat octet first
var key = new byte[_salt.Length + 4];
Array.Copy(_salt, key, _salt.Length);
byte[] g = { 0, 0, 0, 1 };
Array.Copy(g, 0, key, _salt.Length, 4);
// Compute initial hash
var hmac = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
// Create Key
var passwordBuffer = CryptographicBuffer.ConvertStringToBinary(Stringprep.SASLPrep(Password), BinaryStringEncoding.Utf8);
var hmacKey = hmac.CreateKey(passwordBuffer);
var result = CryptographicEngine.Sign(hmacKey, key.AsBuffer()).ToArray();
Array.Copy(result, prev, (int)result.Length);
for (var i = 1; i < _i; ++i)
{
var temp = CryptographicEngine.Sign(hmacKey, prev.AsBuffer()).ToArray();
for (var j = 0; j < temp.Length; ++j)
{
result[j] ^= temp[j];
}
Array.Copy(temp, prev, temp.Length);
}
return(result);
}
public byte[] ComputeHash(byte[] buffer, int offset, int count)
{
#if WINDOWS_STORE
MacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(algorithmName);
CryptographicKey hmacKey;
if (Key != null)
{
hmacKey = provider.CreateKey(CryptographicBuffer.CreateFromByteArray(Key));
}
else
{
hmacKey = provider.CreateKey(CryptographicBuffer.GenerateRandom(provider.MacLength));
}
IBuffer hmacValue = CryptographicEngine.Sign(hmacKey, CryptographicBuffer.CreateFromByteArray(buffer));
byte[] result;
CryptographicBuffer.CopyToByteArray(hmacValue, out result);
return(result);
#else
return(hmac.ComputeHash(buffer, offset, count));
#endif
}
private byte[] getMac(byte[] key, byte[] message)
{
try
{
MacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
IBuffer buffPrk = CryptographicBuffer.CreateFromByteArray(key);
CryptographicKey hmacKey = provider.CreateKey(buffPrk);
IBuffer buffMsg = CryptographicBuffer.CreateFromByteArray(message);
IBuffer buffHMAC = CryptographicEngine.Sign(hmacKey, buffMsg);
byte[] ret;
CryptographicBuffer.CopyToByteArray(buffHMAC, out ret);
/*Mac mac = Mac.getInstance("HmacSHA256");
* mac.init(new SecretKeySpec(key, "HmacSHA256"));*/
return(ret);
}
catch (/*NoSuchAlgorithmException | java.security.InvalidKeyException*/ Exception e) {
throw new Exception(e.Message);
}
}
public byte[] ComputeHash(byte[] buffer)
{
var crypt = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
var sigBuffer = CryptographicEngine.Sign(crypt.CreateKey(CryptographicBuffer.CreateFromByteArray(hmackey)), CryptographicBuffer.CreateFromByteArray(buffer));
return(sigBuffer.ToArray());
}
private string _generateConfirmationHashForTime(long time, string tag)
{
int n2 = tag != null?Math.Min(40, 8 + tag.Length) : 8;
var array = new byte[n2];
for (var n4 = 7; n4 >= 0; n4--)
{
array[n4] = (byte)time;
time >>= 8;
}
if (tag != null)
{
Array.Copy(Encoding.UTF8.GetBytes(tag), 0, array, 8, n2 - 8);
}
try
{
IBuffer identitySecretArray = CryptographicBuffer.DecodeFromBase64String(this.IdentitySecret);
MacAlgorithmProvider hmacsha1 = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
CryptographicKey hmacKey = hmacsha1.CreateKey(identitySecretArray);
string encodedData = CryptographicBuffer.EncodeToBase64String(CryptographicEngine.Sign(hmacKey, CryptographicBuffer.CreateFromByteArray(array)));
string hash = WebUtility.UrlEncode(encodedData);
return(hash);
}
catch (Exception)
{
return(null); //Fix soon: catch-all is BAD!
}
}
static IBuffer HMACHandle(IBuffer data, IBuffer key, string hmacType)
{
MacAlgorithmProvider hmacAlgorithm = MacAlgorithmProvider.OpenAlgorithm(hmacType);
CryptographicKey hmacKey = hmacAlgorithm.CreateKey(key);
return(CryptographicEngine.Sign(hmacKey, data));
}
public async Task <bool> CompareAsync(byte[] a, byte[] b)
{
var provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithm.HmacSha256);
var hasher = provider.CreateHash(await RandomBytesAsync(32));
hasher.Append(a);
var mac1 = hasher.GetValueAndReset();
hasher.Append(b);
var mac2 = hasher.GetValueAndReset();
if (mac1.Length != mac2.Length)
{
return(false);
}
for (int i = 0; i < mac2.Length; i++)
{
if (mac1[i] != mac2[i])
{
return(false);
}
}
return(true);
}
/// <summary>
/// HTTP请求签名
/// </summary>
/// <param name="url">请求目标的URL</param>
/// <param name="body">请求的主体数据</param>
/// <returns></returns>
public string SignRequest(string url, byte[] body)
{
Uri u = new Uri(url);
string pathAndQuery = u.PathAndQuery;
byte[] pathAndQueryBytes = Encoding.UTF8.GetBytes(pathAndQuery);
using (MemoryStream buffer = new MemoryStream())
{
buffer.Write(pathAndQueryBytes, 0, pathAndQueryBytes.Length);
buffer.WriteByte((byte)'\n');
if (body != null && body.Length > 0)
{
buffer.Write(body, 0, body.Length);
}
#if WINDOWS_UWP
var hma = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha1);
var skBuffer = CryptographicBuffer.ConvertStringToBinary(mac.SecretKey, BinaryStringEncoding.Utf8);
var hmacKey = hma.CreateKey(skBuffer);
var dataBuffer = CryptographicBuffer.CreateFromByteArray(buffer.ToArray());
var signBuffer = CryptographicEngine.Sign(hmacKey, dataBuffer);
byte[] digest;
CryptographicBuffer.CopyToByteArray(signBuffer, out digest);
#else
HMACSHA1 hmac = new HMACSHA1(Encoding.UTF8.GetBytes(mac.SecretKey));
byte[] digest = hmac.ComputeHash(buffer.ToArray());
#endif
string digestBase64 = Base64.UrlSafeBase64Encode(digest);
return(string.Format("{0}:{1}", mac.AccessKey, digestBase64));
}
}
public string OAuthSignature(string SigBaseString, SignatureAuthType signType)
{
string signingKey = string.Empty;
//Debug.WriteLine("In OAuthSignature function");
switch (signType)
{
case SignatureAuthType.ConsumerSecret:
signingKey = string.Format("{0}&{1}", OAuth.OAuthTypes.OAuthConsumerSecret, "");
break;
case SignatureAuthType.RequestSecretToken:
signingKey = string.Format("{0}&{1}", OAuth.OAuthTypes.OAuthConsumerSecret, !string.IsNullOrEmpty(OAuth.OAuthTypes.OAuthRequestTokenSecretKey) ? OAuth.OAuthTypes.OAuthRequestTokenSecretKey : String.Empty);
break;
case SignatureAuthType.AccessSecretToken:
signingKey = string.Format("{0}&{1}", OAuth.OAuthTypes.OAuthConsumerSecret, !string.IsNullOrEmpty(OAuth.OAuthTypes.OAuthAccessTokenSecretKey) ? OAuth.OAuthTypes.OAuthAccessTokenSecretKey : String.Empty);
break;
default:
break;
}
IBuffer KeyBuffer = CryptographicBuffer.ConvertStringToBinary(signingKey, BinaryStringEncoding.Utf8);
MacAlgorithmProvider HmacSha1Provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha1);
CryptographicKey MacKey = HmacSha1Provider.CreateKey(KeyBuffer);
IBuffer DataToBeSigned = CryptographicBuffer.ConvertStringToBinary(SigBaseString, BinaryStringEncoding.Utf8);
IBuffer SignatureBuffer = CryptographicEngine.Sign(MacKey, DataToBeSigned);
String Signature = CryptographicBuffer.EncodeToBase64String(SignatureBuffer);
//Debug.WriteLine("Signed Signature: " + Signature);
return(Signature);
}
public AttachmentCipherInputStream(StorageFile file, byte[] combinedKeyMaterial)
{
byte[][] parts = Util.split(combinedKeyMaterial, CIPHER_KEY_SIZE, MAC_KEY_SIZE);
MacAlgorithmProvider mac = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
IBuffer keyMaterial = parts[1].AsBuffer();
CryptographicKey key = mac.CreateKey(keyMaterial);
}
public string PubnubAccessManagerSign(string key, string data)
{
string secret = key;
string message = data;
var encoding = new System.Text.UTF8Encoding();
byte[] keyByte = encoding.GetBytes(secret);
byte[] messageBytes = encoding.GetBytes(message);
#if NETFX_CORE
var hmacsha256 = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256);
IBuffer valueBuffer = CryptographicBuffer.ConvertStringToBinary(message, BinaryStringEncoding.Utf8);
IBuffer buffKeyMaterial = CryptographicBuffer.ConvertStringToBinary(secret, BinaryStringEncoding.Utf8);
CryptographicKey cryptographicKey = hmacsha256.CreateKey(buffKeyMaterial);
// Sign the key and message together.
IBuffer bufferProtected = CryptographicEngine.Sign(cryptographicKey, valueBuffer);
DataReader dataReader = DataReader.FromBuffer(bufferProtected);
byte[] hashmessage = new byte[bufferProtected.Length];
dataReader.ReadBytes(hashmessage);
return(Convert.ToBase64String(hashmessage).Replace('+', '-').Replace('/', '_'));
#else
using (var hmacsha256 = new HMACSHA256(keyByte))
{
byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);
return(Convert.ToBase64String(hashmessage).Replace('+', '-').Replace('/', '_'));
}
#endif
}
public void Initialize()
{
var buffer = CryptographicBuffer.CreateFromByteArray(Key);
algorithm = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacMd5);
hash = algorithm.CreateHash(buffer);
}
private string GetSHA1Key(byte[] secretKey, string value)
{
var objMacProv = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha1);
var hash = objMacProv.CreateHash(secretKey.AsBuffer());
hash.Append(CryptographicBuffer.ConvertStringToBinary(value, BinaryStringEncoding.Utf8));
return(CryptographicBuffer.EncodeToBase64String(hash.GetValueAndReset()).Replace('+', '-').Replace('/', '_'));
}
public Task <byte[]> HmacAsync(byte[] value, byte[] key, CryptoHashAlgorithm algorithm)
{
var provider = MacAlgorithmProvider.OpenAlgorithm(ToMacAlgorithm(algorithm));
var hasher = provider.CreateHash(key);
hasher.Append(value);
return(Task.FromResult(hasher.GetValueAndReset()));
}
public OTP(string key)
{
MacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha1);
IBuffer keyMaterial = CryptographicBuffer.CreateFromByteArray(key.ToBytesBase32());
cKey = provider.CreateKey(keyMaterial);
}
public static byte[] sha256sum(byte[] key, byte[] message)
{
IMacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithm.HmacSha256);
ICryptographicKey hmacKey = provider.CreateKey(key);
byte [] hmac = CryptographicEngine.Sign(hmacKey, message);
return(hmac);
}
public static bool Verify(byte[] key, byte[] message, byte[] signature)
{
IMacAlgorithmProvider provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithm.HmacSha256);
ICryptographicKey hmacKey = provider.CreateKey(key);
return(CryptographicEngine.VerifySignature(hmacKey, message, signature));
}