mirror of
https://github.com/opensim/opensim.git
synced 2026-05-15 03:15:41 +08:00
Fix llHMAC and ComputeHash
Signed-off-by: UbitUmarov <ajlduarte@sapo.pt>
This commit is contained in:
Vincent Sylvester
committed by
UbitUmarov
UbitUmarov
parent
dc3d44a458
commit
f6227d26eb
@@ -8547,57 +8547,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
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return Util.SHA1Hash(src, Encoding.UTF8).ToLower();
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}
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public LSL_String llHMAC(LSL_String private_key, LSL_String message, LSL_String algo)
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{
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if (private_key.Length < 1 || message.Length < 1)
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return new LSL_String();
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try
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{
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HMAC hasher;
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switch (algo)
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{
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case "md5":
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hasher = new HMACMD5(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha1":
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hasher = new HMACSHA1(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha224":
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hasher = new HMACSHA224(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha256":
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hasher = new HMACSHA256(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha384":
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hasher = new HMACSHA384(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha512":
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hasher = new HMACSHA512(Encoding.UTF8.GetBytes(private_key));
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break;
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default:
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return new LSL_String();
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}
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byte[] hashBytes;
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try
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{
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hashBytes = hasher.ComputeHash(Encoding.UTF8.GetBytes(message));
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}
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catch
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{
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return new LSL_String();
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}
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finally
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{
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hasher.Dispose();
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}
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return new LSL_String(Util.bytesToLowcaseHexString(hashBytes));
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}
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catch { }
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return new LSL_String();
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}
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public LSL_String llSHA256String(LSL_String input)
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{
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byte[] bytes;
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@@ -19472,6 +19421,115 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
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*/
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}
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public LSL_String llComputeHash(LSL_String message, LSL_String algo)
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{
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switch (algo)
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{
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case "md5":
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using (MD5 md5 = MD5.Create())
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{
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byte[] hashedBytes = md5.ComputeHash(Encoding.UTF8.GetBytes(message));
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return Util.bytesToLowcaseHexString(hashedBytes);
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}
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case "md5_sha1":
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using (MD5 md5 = MD5.Create())
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using (SHA1 sha1 = SHA1.Create())
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{
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byte[] inputBytes = Encoding.UTF8.GetBytes(message);
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byte[] md5Hash = md5.ComputeHash(inputBytes);
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byte[] sha1Hash = sha1.ComputeHash(inputBytes);
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byte[] combinedHash = new byte[md5Hash.Length + sha1Hash.Length];
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Buffer.BlockCopy(md5Hash, 0, combinedHash, 0, md5Hash.Length);
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Buffer.BlockCopy(sha1Hash, 0, combinedHash, md5Hash.Length, sha1Hash.Length);
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return BitConverter.ToString(combinedHash).Replace("-", "").ToLower();
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}
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case "sha1":
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using (SHA1 sha1 = SHA1.Create())
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{
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byte[] hashedBytes = sha1.ComputeHash(Encoding.UTF8.GetBytes(message));
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return Util.bytesToLowcaseHexString(hashedBytes);
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}
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case "sha224":
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using (SHA224 sha224 = SHA224.Create())
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{
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byte[] hashedBytes = sha224.ComputeHash(Encoding.UTF8.GetBytes(message));
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return Util.bytesToLowcaseHexString(hashedBytes);
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}
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case "sha256":
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using (SHA256 sha1 = SHA256.Create())
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{
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byte[] hashedBytes = sha1.ComputeHash(Encoding.UTF8.GetBytes(message));
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return Util.bytesToLowcaseHexString(hashedBytes);
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}
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case "sha384":
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using (SHA384 sha1 = SHA384.Create())
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{
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byte[] hashedBytes = sha1.ComputeHash(Encoding.UTF8.GetBytes(message));
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return Util.bytesToLowcaseHexString(hashedBytes);
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}
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case "sha512":
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using (SHA512 sha1 = SHA512.Create())
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{
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byte[] hashedBytes = sha1.ComputeHash(Encoding.UTF8.GetBytes(message));
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return Util.bytesToLowcaseHexString(hashedBytes);
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}
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default:
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break;
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}
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return new LSL_String();
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}
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public LSL_String llHMAC(LSL_String private_key, LSL_String message, LSL_String algo)
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{
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if (private_key.Length < 1 || message.Length < 1)
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return new LSL_String();
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if (algo.Equals("sha224"))
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return HMAC_SHA224(private_key, message);
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try
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{
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HMAC hasher;
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switch (algo)
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{
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case "md5":
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hasher = new HMACMD5(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha1":
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hasher = new HMACSHA1(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha256":
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hasher = new HMACSHA256(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha384":
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hasher = new HMACSHA384(Encoding.UTF8.GetBytes(private_key));
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break;
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case "sha512":
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hasher = new HMACSHA512(Encoding.UTF8.GetBytes(private_key));
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break;
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default:
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return new LSL_String();
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}
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byte[] hashBytes;
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try
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{
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hashBytes = hasher.ComputeHash(Encoding.UTF8.GetBytes(message));
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}
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catch
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{
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return new LSL_String();
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}
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finally
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{
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hasher.Dispose();
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}
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return new LSL_String(Util.bytesToLowcaseHexString(hashBytes));
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}
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catch { }
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return new LSL_String();
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}
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}
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public class NotecardCache
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@@ -19551,44 +19609,128 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
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}
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public class HMACSHA224 : HMAC
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// C# doesn't have a native way to do this so instead of adding a library this will do
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public class SHA224 : HashAlgorithm, IDisposable
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{
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public HMACSHA224(byte[] key)
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private byte[] stream;
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public SHA224()
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{
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HashName = "SHA-224";
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HashSizeValue = 224;
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base.Key = key;
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HashAlgorithm = new SHA224Managed();
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}
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public SHA224Managed HashAlgorithm { get; }
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}
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public class SHA224Managed : SHA256
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{
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public byte[] ComputeHashe(byte[] buffer)
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{
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using (SHA256 sha256 = SHA256.Create())
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{
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byte[] fullHash = sha256.ComputeHash(buffer);
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Array.Resize(ref fullHash, 28); // Truncate to 224 bits
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return fullHash;
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}
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}
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public override void Initialize()
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{
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throw new NotImplementedException();
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stream = new byte[224];
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}
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public static new SHA224 Create()
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{
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return new SHA224();
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}
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public new void Dispose()
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{
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base.Dispose();
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}
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private static byte[] ComputeHashInternal(byte[] data)
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{
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uint[] K = {
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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};
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uint[] H = {
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0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
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0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4
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};
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ulong bitLength = (ulong)data.Length * 8;
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int paddedLength = ((data.Length + 9 + 63) / 64) * 64;
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byte[] padded = new byte[paddedLength];
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Array.Copy(data, padded, data.Length);
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padded[data.Length] = 0x80;
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for (int i = 0; i < 8; i++)
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padded[padded.Length - 8 + i] = (byte)((bitLength >> ((7 - i) * 8)) & 0xFF);
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for (int chunk = 0; chunk < padded.Length / 64; chunk++)
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{
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uint[] W = new uint[64];
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for (int i = 0; i < 16; i++)
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{
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W[i] = (uint)(padded[chunk * 64 + i * 4] << 24) |
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(uint)(padded[chunk * 64 + i * 4 + 1] << 16) |
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(uint)(padded[chunk * 64 + i * 4 + 2] << 8) |
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(uint)(padded[chunk * 64 + i * 4 + 3]);
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}
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for (int i = 16; i < 64; i++)
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{
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uint s0 = (W[i - 15] >> 7 | W[i - 15] << 25) ^ (W[i - 15] >> 18 | W[i - 15] << 14) ^ (W[i - 15] >> 3);
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uint s1 = (W[i - 2] >> 17 | W[i - 2] << 15) ^ (W[i - 2] >> 19 | W[i - 2] << 13) ^ (W[i - 2] >> 10);
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W[i] = W[i - 16] + s0 + W[i - 7] + s1;
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}
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uint a = H[0], b = H[1], c = H[2], d = H[3], e = H[4], f = H[5], g = H[6], h = H[7];
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for (int i = 0; i < 64; i++)
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{
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uint S1 = (e >> 6 | e << 26) ^ (e >> 11 | e << 21) ^ (e >> 25 | e << 7);
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uint ch = (e & f) ^ (~e & g);
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uint temp1 = h + S1 + ch + K[i] + W[i];
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uint S0 = (a >> 2 | a << 30) ^ (a >> 13 | a << 19) ^ (a >> 22 | a << 10);
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uint maj = (a & b) ^ (a & c) ^ (b & c);
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uint temp2 = S0 + maj;
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h = g;
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g = f;
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f = e;
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e = d + temp1;
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d = c;
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c = b;
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b = a;
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a = temp1 + temp2;
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}
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H[0] += a;
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H[1] += b;
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H[2] += c;
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H[3] += d;
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H[4] += e;
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H[5] += f;
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H[6] += g;
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H[7] += h;
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}
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byte[] result = new byte[28];
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for (int i = 0; i < 7; i++)
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{
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result[i * 4 + 0] = (byte)((H[i] >> 24) & 0xFF);
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result[i * 4 + 1] = (byte)((H[i] >> 16) & 0xFF);
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result[i * 4 + 2] = (byte)((H[i] >> 8) & 0xFF);
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result[i * 4 + 3] = (byte)(H[i] & 0xFF);
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}
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return result;
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}
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protected override void HashCore(byte[] array, int ibStart, int cbSize)
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{
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throw new NotImplementedException();
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stream = array;
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}
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protected override byte[] HashFinal()
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{
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throw new NotImplementedException();
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return ComputeHashInternal(stream);
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}
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}
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}
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