mirror of
https://github.com/danieleteti/delphimvcframework.git
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150 lines
4.0 KiB
ObjectPascal
150 lines
4.0 KiB
ObjectPascal
// ***************************************************************************
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//
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// Delphi MVC Framework
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//
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// Copyright (c) 2010-2018 Daniele Teti and the DMVCFramework Team
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//
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// https://github.com/danieleteti/delphimvcframework
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//
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// ***************************************************************************
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// *************************************************************************** }
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unit MVCFramework.HMAC;
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interface
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uses
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System.SysUtils,
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EncdDecd,
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IdHMAC;
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type
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EMVCHMACException = class(Exception)
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end;
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IHMAC = interface
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['{95134024-BBAF-4E52-A4C3-54189672E18A}']
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function HashValue(const Input, key: string): TBytes;
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end;
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function HMAC(const Algorithm: string; const Input, Key: string): TBytes;
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procedure RegisterHMACAlgorithm(const Algorithm: string; Impl: IHMAC);
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procedure UnRegisterHMACAlgorithm(const Algorithm: string);
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const
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// registering based on hash function
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HMAC_MD5 = 'md5';
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HMAC_SHA1 = 'sha1';
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HMAC_SHA224 = 'sha224';
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HMAC_SHA256 = 'sha256';
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HMAC_SHA384 = 'sha384';
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HMAC_SHA512 = 'sha512';
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// the same using the JWT naming
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HMAC_HS256 = 'HS256';
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HMAC_HS384 = 'HS384';
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HMAC_HS512 = 'HS512';
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implementation
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uses
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IdSSLOpenSSL, IdHash, IdGlobal, IdHMACMD5,
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IdHMACSHA1, System.Generics.Collections;
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var
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GHMACRegistry: TDictionary<string, IHMAC>;
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type
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THMACClass = class of TIdHMAC;
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TIdHMACWrapper = class(TInterfacedObject, IHMAC)
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private
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FClass: THMACClass;
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public
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constructor Create(IdClass: THMACClass);
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function HashValue(const Input: string;
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const key: string): System.TArray<System.Byte>;
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end;
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function HMAC(const Algorithm: string; const Input, Key: string): TBytes;
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begin
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if not GHMACRegistry.ContainsKey(Algorithm) then
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raise EMVCHMACException.CreateFmt('Unknown HMAC algorithm [%s]', [Algorithm]);
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result := GHMACRegistry[Algorithm].HashValue(Input, Key);
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end;
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procedure RegisterHMACAlgorithm(const Algorithm: string; Impl: IHMAC);
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begin
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if GHMACRegistry.ContainsKey(Algorithm) then
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raise EMVCHMACException.Create('Algorithm already registered');
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GHMACRegistry.Add(Algorithm, Impl);
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end;
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procedure UnRegisterHMACAlgorithm(const Algorithm: string);
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begin
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GHMACRegistry.Remove(Algorithm);
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end;
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{ TIdHMACWrapper }
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constructor TIdHMACWrapper.Create(IdClass: THMACClass);
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begin
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FClass := IdClass;
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end;
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function TIdHMACWrapper.HashValue(const Input,
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key: string): System.TArray<System.Byte>;
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var
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lHMAC: TIdHMAC;
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begin
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Assert(IdSSLOpenSSL.LoadOpenSSLLibrary, 'HMAC requires OpenSSL libraries');
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lHMAC := FClass.Create;
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try
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lHMAC.Key := ToBytes(Key, IndyTextEncoding_UTF8);
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Result := TBytes(lHMAC.HashValue(ToBytes(Input, IndyTextEncoding_UTF8)));
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finally
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lHMAC.Free;
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end;
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end;
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initialization
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GHMACRegistry := TDictionary<string, IHMAC>.Create;
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// registering based on hash function
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RegisterHMACAlgorithm('md5', TIdHMACWrapper.create(TIdHMACMD5));
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RegisterHMACAlgorithm('sha1', TIdHMACWrapper.create(TIdHMACSHA1));
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RegisterHMACAlgorithm('sha224', TIdHMACWrapper.create(TIdHMACSHA224));
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RegisterHMACAlgorithm('sha256', TIdHMACWrapper.create(TIdHMACSHA256));
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RegisterHMACAlgorithm('sha384', TIdHMACWrapper.create(TIdHMACSHA384));
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RegisterHMACAlgorithm('sha512', TIdHMACWrapper.create(TIdHMACSHA512));
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// the same using the JWT naming
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RegisterHMACAlgorithm('HS256', TIdHMACWrapper.create(TIdHMACSHA256));
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RegisterHMACAlgorithm('HS384', TIdHMACWrapper.create(TIdHMACSHA384));
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RegisterHMACAlgorithm('HS512', TIdHMACWrapper.create(TIdHMACSHA512));
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finalization
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GHMACRegistry.Free;
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end.
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