Added new OpenSSL IO Handler for OpenSSL 1.1.1

Lib/Protocols/OpenSSL/.gitattributes

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+# Declare files that will always have CRLF line endings on checkout.
+*.pas text eol=crlf

Lib/Protocols/OpenSSL/GenerateCode/GenerateCode.dpr

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+{******************************************************************************}
+{                                                                              }
+{            Indy (Internet Direct) - Internet Protocols Simplified            }
+{                                                                              }
+{            https://www.indyproject.org/                                      }
+{            https://gitter.im/IndySockets/Indy                                }
+{                                                                              }
+{******************************************************************************}
+{                                                                              }
+{  This file is part of the Indy (Internet Direct) project, and is offered     }
+{  under the dual-licensing agreement described on the Indy website.           }
+{  (https://www.indyproject.org/license/)                                      }
+{                                                                              }
+{  Copyright:                                                                  }
+{   (c) 1993-2020, Chad Z. Hower and the Indy Pit Crew. All rights reserved.   }
+{                                                                              }
+{******************************************************************************}
+{                                                                              }
+{        Originally written by: Fabian S. Biehn                                }
+{                               [email protected] (German & English)            }
+{                                                                              }
+{        Contributers:                                                         }
+{                               Here could be your name                        }
+{                                                                              }
+{******************************************************************************}
+
+program GenerateCode;
+
+{$APPTYPE CONSOLE}
+
+{$R *.res}
+
+uses
+  System.Classes,
+  System.IOUtils,
+  System.StrUtils,
+  System.SysUtils,
+  System.Types,
+  Winapi.Windows;
+
+type
+  TGenerateMode = (gmDynamic, gmStatic);
+
+function ExpandEnvironmentVariables(const AValue: string): string;
+const
+  MAX_LENGTH = 32767;
+begin
+  SetLength(Result, MAX_LENGTH);
+  SetLength(Result, ExpandEnvironmentStrings(@AValue[1], @Result[1], MAX_LENGTH)-1);
+end;
+
+function ReplaceStatic(const ALine: string; const AShouldUseLibSSL: Boolean): string;
+const
+  CSemicolon: string = ';';
+var
+  i: Integer;
+begin
+  Result := ALine;
+  i := Result.LastIndexOf(CSemicolon);
+  if i = -1 then
+    Exit;
+  Result := Result.Remove(i, CSemicolon.Length);
+  Result := Result.Insert(i, Format(' cdecl; external %s;', [IfThen(AShouldUseLibSSL, 'CLibSSL', 'CLibCrypto')]));
+end;
+
+function ReplaceDynamic(const ALine: string; const AMethodList: TStringList): string;
+var
+  i: Integer;
+  LMethodPrefix: string;
+  LMethod: string;
+begin
+  Result := ALine;
+
+  if not Result.TrimLeft.StartsWith('function') and not Result.TrimLeft.StartsWith('procedure') then
+    Exit;
+
+  LMethodPrefix := 'function';
+  i := Result.IndexOf(LMethodPrefix);
+  if i = -1 then
+  begin
+    LMethodPrefix := 'procedure';
+    i := Result.IndexOf(LMethodPrefix);
+    if i = -1 then
+      Exit;
+  end;
+
+  // Remove LMethodPrefix
+  Result := Result.Remove(i, LMethodPrefix.Length + string(' ').Length);
+  // Keep Result for method name extracting later
+  LMethod := Result.TrimLeft();
+  // Add LMethodPrefix after parameters
+  if Result.Contains(')') then
+    Result := Result.Replace('(', ': ' + LMethodPrefix + '(')
+  // No Params? Add LMethodPrefix after before return type
+  else if Result.Contains(': ') then
+    Result := Result.Replace(': ', ': ' + LMethodPrefix + ': ')
+  // Also no return type? Add LMethodPrefix before semi colon
+  else
+    Result := Result.Replace(';', ': ' + LMethodPrefix + ';');
+
+  if Result[Result.Length] = ';' then
+    Result := Result.Remove(Result.Length-1) + ' cdecl = nil;';
+
+  // Ignore comments
+  i := LMethod.IndexOf('}');
+  if i > -1 then
+    // +1 for including } and Trim for removing whitespace of intendation
+    LMethod := LMethod.Substring(i + 1{, LMethod.Length - i}).TrimLeft;
+  i := LMethod.IndexOf(';');
+  if i > -1 then
+    LMethod := LMethod.Remove(i);
+  i := LMethod.IndexOf(' ');
+  if i > -1 then
+    LMethod := LMethod.Remove(i);
+  i := LMethod.IndexOf(':');
+  if i > -1 then
+    LMethod := LMethod.Remove(i);
+  i := LMethod.IndexOf('(');
+  if i > -1 then
+    LMethod := LMethod.Remove(i);
+  AMethodList.Add(LMethod);
+end;
+
+procedure AddDynamicLoadingMethods(
+  const AFile: TStringList;
+  const AMethods: TStringList;
+  const AUsesIndex: Integer;
+  const AVarIndex: Integer;
+  const AImplementationIndex: Integer);
+
+  procedure Insert(const AList: TStringList; const s: string; var Index: Integer);
+  begin
+    AList.Insert(Index, s);
+    Inc(Index);
+  end;
+
+  function Find(const AList: TStringList; const s: string; var Index: Integer; const AOffset: Integer = 0): Boolean;
+  var
+    i: Integer;
+  begin
+    Result := False;
+    for i := AOffset to AList.Count - 1 do
+    begin
+      if AList[i].Contains(s) then
+      begin
+        Index := i;
+        Exit(True);
+      end;
+    end;
+  end;
+
+var
+  LOffset: Integer;
+  LMethod: string;
+begin
+  if AImplementationIndex = -1 then
+    Exit;
+  LOffset := AImplementationIndex + 1;
+
+  if Find(AFile, 'uses', LOffset, LOffset) then
+    if Find(AFile, ';', LOffset, LOffset) then
+      Inc(LOffset);
+
+  Insert(AFile, '', LOffset);
+  Insert(AFile, 'procedure Load(const ADllHandle: TIdLibHandle; const AFailed: TStringList);', LOffset);
+  Insert(AFile, '', LOffset);
+  Insert(AFile, '  function LoadFunction(const AMethodName: string; const AFailed: TStringList): Pointer;', LOffset);
+  Insert(AFile, '  begin', LOffset);
+  Insert(AFile, '    Result := LoadLibFunction(ADllHandle, AMethodName);', LOffset);
+  Insert(AFile, '    if not Assigned(Result) then', LOffset);
+  Insert(AFile, '      AFailed.Add(AMethodName);', LOffset);
+  Insert(AFile, '  end;', LOffset);
+  Insert(AFile, '', LOffset);
+  Insert(AFile, 'begin', LOffset);
+  for LMethod in AMethods do
+    Insert(AFile, Format('  %0:s := LoadFunction(''%0:s'', AFailed);', [LMethod]), LOffset);
+  Insert(AFile, 'end;', LOffset);
+  Insert(AFile, '', LOffset);
+
+
+  Insert(AFile, 'procedure UnLoad;', LOffset);
+  Insert(AFile, 'begin', LOffset);
+  for LMethod in AMethods do
+    Insert(AFile, Format('  %s := nil;', [LMethod]), LOffset);
+  Insert(AFile, 'end;', LOffset);
+
+  if AVarIndex = -1 then
+    Exit;
+  LOffSet := Pred(AVarIndex);
+  Insert(AFile, '', LOffSet);
+  Insert(AFile, 'procedure Load(const ADllHandle: TIdLibHandle; const AFailed: TStringList);', LOffSet);
+  Insert(AFile, 'procedure UnLoad;', LOffSet);
+
+  LOffSet := Succ(AUsesIndex);
+  Insert(AFile, '  Classes,', LOffset);
+//  AFile.Insert(Pred(AVarIndex), 'function Load(const ADllHandle: THandle): TArray<string>;');
+end;
+
+function ShouldSkipLine(ALine: string): Boolean;
+begin
+  ALine := ALine.Trim;
+  Result := ALine.IsEmpty;
+  Result := Result or ALine.StartsWith('//');
+  Result := Result or ALine.StartsWith('(*');
+  Result := Result or ALine.StartsWith('*');
+end;
+
+function ReadParameters(out ASource: string; out ATarget: string; out AMode: TGenerateMode): Boolean;
+var
+  LMode: string;
+begin
+  Result := True;
+  if not FindCmdLineSwitch('Source', ASource) then
+  begin
+    Writeln('No source folder!');
+    Exit(False);
+  end;
+  ASource := ExpandEnvironmentVariables(ASource);
+
+  if not FindCmdLineSwitch('Target', ATarget) then
+  begin
+    Writeln('No target folder!');
+    Exit(False);
+  end;
+  ATarget := ExpandEnvironmentVariables(ATarget);
+
+  if not FindCmdLineSwitch('Mode', LMode) then
+  begin
+    Writeln('No mode!');
+    Exit(False);
+  end;
+
+  if LMode = 'dynamic' then
+    AMode := gmDynamic
+  else if LMode = 'static' then
+    AMode := gmStatic
+  else
+  begin
+    Writeln('Invalid mode! Use "dynamic" or "static"!');
+    Exit(False);
+  end;
+end;
+
+procedure AddGeneratedHeader(const AFile: TStringList);
+
+  function Find(const AList: TStringList; const s: string; var Index: Integer): Boolean;
+  var
+    i: Integer;
+  begin
+    Index := -1;
+    Result := False;
+    for i := 0 to AList.Count-1 do
+      if AList[i].Contains(s) then
+      begin
+        Index := i;
+        Exit(True);
+      end;
+  end;
+
+const
+  CHeader: array[0..4] of string =
+  (
+   '',
+   '// This File is auto generated!',
+   '// Any change to this file should be made in the',
+   '// corresponding unit in the folder "intermediate"!',
+   ''
+  );
+var
+  i: Integer;
+  LOffset: Integer;
+begin
+  if not Find(AFile, 'unit ', LOffset) then
+    Exit;
+  // Keep a empty line before "unit"
+  Dec(LOffset);
+  for i := Low(CHeader) to High(CHeader) do
+    AFile.Insert(i + LOffset, CHeader[i]);
+  AFile.Insert(Length(CHeader) + LOffset, '// Generation date: ' + DateTimeToStr(Now()));
+end;
+
+procedure Main;
+var
+  LFile: string;
+  LStringListFile: TStringList;
+  i: Integer;
+  LVarIndex: Integer;
+  LUsesIndex: Integer;
+  LImplementationIndex: Integer;
+  LSource: string;
+  LTarget: string;
+  LMode: TGenerateMode;
+  LStringListMethods: TStringList;
+  LFileName: string;
+  LShouldUseLibSSL: Boolean;
+begin
+  if not ReadParameters(LSource, LTarget, LMode) then
+  begin
+    Readln;
+    Exit;
+  end;
+
+  for LFile in TDirectory.GetFiles(LSource, '*.pas') do
+  begin
+    Writeln('Converting ' + LFile);
+    LFileName := TPath.GetFileName(LFile);
+    LStringListFile := TStringList.Create();
+    LStringListMethods := TStringList.Create();
+    try
+      LStringListFile.LoadFromFile(LFile);
+      LUsesIndex := -1;
+      LVarIndex := -1;
+      LImplementationIndex := -1;
+      LShouldUseLibSSL := MatchText(LFileName,
+        ['IdOpenSSLHeaders_ssl.pas', 'IdOpenSSLHeaders_sslerr.pas', 'IdOpenSSLHeaders_tls1.pas']);
+      for i := 0 to LStringListFile.Count - 1 do
+      begin
+        // Find fist uses
+        if (LVarIndex = -1) and (LUsesIndex = -1) then
+          if LStringListFile[i].StartsWith('uses') then
+            LUsesIndex := i;
+
+        // var block found?
+        if (LVarIndex = -1) and LStringListFile[i].StartsWith('var') then
+          LVarIndex := i;
+        // Skip until we find the var block
+        if (LVarIndex = -1) or ShouldSkipLine(LStringListFile[i]) then
+          Continue;
+
+        // No need to go further than "implementation"
+        if LStringListFile[i] = 'implementation' then
+        begin
+          LImplementationIndex := i;
+          Break;
+        end;
+
+        case LMode of
+          gmDynamic:
+            LStringListFile[i] := ReplaceDynamic(LStringListFile[i], LStringListMethods);
+          gmStatic:
+            LStringListFile[i] := ReplaceStatic(LStringListFile[i], LShouldUseLibSSL);
+        end;
+      end;
+
+      case LMode of
+        gmDynamic:
+          AddDynamicLoadingMethods(LStringListFile, LStringListMethods, LUsesIndex, LVarIndex, LImplementationIndex);
+        gmStatic:
+          if LVarIndex > -1 then
+            LStringListFile.Delete(LVarIndex);
+      end;
+
+      AddGeneratedHeader(LStringListFile);
+
+      LStringListFile.SaveToFile(TPath.Combine(LTarget, LFileName));
+    finally
+      LStringListMethods.Free();
+      LStringListFile.Free();
+    end;
+  end;
+end;
+
+begin
+  try
+    Main;
+    Writeln('done');
+  except
+    on E: Exception do
+    begin
+      Writeln(E.ClassName, ': ', E.Message);
+    end;
+  end;
+//  Readln;
+end.