Rev 6 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | daniel-mar | 1 | unit MD5; |
| 2 | |||
| 3 | interface |
||
| 4 | |||
| 5 | uses |
||
| 6 | daniel-mar | 6 | Classes, Common; |
| 2 | daniel-mar | 7 | |
| 6 | daniel-mar | 8 | type |
| 9 | TCheckSumFileMD5 = class(TCheckSumFile) |
||
| 10 | protected |
||
| 11 | Fmd5File: string; |
||
| 12 | public |
||
| 13 | constructor Create(AFileName: string); override; |
||
| 14 | procedure ToStringList(slOut: TStringList); override; |
||
| 15 | function SingleFileChecksum(AFileName: string): string; override; |
||
| 16 | function MergeLine(AFileName, ACheckSum: string): string; override; |
||
| 17 | end; |
||
| 18 | |||
| 2 | daniel-mar | 19 | function md5file(const filename: string): string; |
| 20 | procedure MD5FileToStringList(amd5file: string; slOut: TStringList); |
||
| 21 | |||
| 22 | implementation |
||
| 23 | |||
| 24 | uses |
||
| 6 | daniel-mar | 25 | SysUtils, IdHashMessageDigest, idHash, LongFilenameOperations; |
| 2 | daniel-mar | 26 | |
| 27 | function md5file(const filename: string): string; |
||
| 28 | var |
||
| 29 | IdMD5: TIdHashMessageDigest5; |
||
| 30 | FS: TFileStream; |
||
| 31 | begin |
||
| 32 | IdMD5 := TIdHashMessageDigest5.Create; |
||
| 33 | FS := TFileStream.Create(filename, fmOpenRead or fmShareDenyWrite); |
||
| 34 | try |
||
| 35 | {$IFDEF UNICODE} // I actually do not know at which version of Delphi/Indy, this has changed. |
||
| 36 | Result := IdMD5.HashStreamAsHex(FS); |
||
| 37 | {$ELSE} |
||
| 38 | Result := IdMD5.AsHex(IdMD5.HashValue(FS)); |
||
| 39 | {$ENDIF} |
||
| 40 | finally |
||
| 41 | FS.Free; |
||
| 42 | IdMD5.Free; |
||
| 43 | end; |
||
| 44 | end; |
||
| 45 | |||
| 46 | procedure MD5FileToStringList(amd5file: string; slOut: TStringList); |
||
| 47 | var |
||
| 48 | sLine: string; |
||
| 49 | originalFilename: string; |
||
| 50 | expectedChecksum: string; |
||
| 51 | fil: THandle; |
||
| 52 | csum: TChecksum; |
||
| 53 | firstLinePassed: boolean; |
||
| 54 | forceUTF8: boolean; |
||
| 55 | begin |
||
| 56 | if not FileExists(amd5file) then |
||
| 57 | exit; |
||
| 58 | |||
| 59 | MyAssignFile(fil, amd5file); |
||
| 60 | try |
||
| 61 | MyReset(fil); |
||
| 62 | firstLinePassed := false; |
||
| 63 | forceUTF8 := false; |
||
| 64 | while not MyEOF(fil) do |
||
| 65 | begin |
||
| 66 | MyReadLn(fil, sLine); |
||
| 67 | |||
| 68 | {$REGION 'Try UTF8 decode'} |
||
| 69 | if not firstLinePassed and (length(sLine)>2) and (sLine[1]=#$EF) and (sLine[2]=#$BB) and (sLine[3]=#$BF) then |
||
| 70 | begin |
||
| 71 | delete(sLine,1,3); // Remove BOM |
||
| 72 | forceUTF8 := true; |
||
| 73 | end; |
||
| 74 | firstLinePassed := true; |
||
| 75 | |||
| 76 | if forceUTF8 or (Pos(#$FFFD, Utf8ToString(RawByteString(sLine))) = 0) then |
||
| 77 | sLine := Utf8ToString(RawByteString(sLine)); |
||
| 78 | {$ENDREGION} |
||
| 79 | |||
| 80 | if Copy(Trim(sLine),1,1) = ';' then continue; |
||
| 81 | // 25bfdef2651071efdd08bb3404797384 *Example.doc |
||
| 82 | sLine := Trim(sLine); |
||
| 83 | if sLine = '' then |
||
| 84 | continue; |
||
| 85 | expectedChecksum := Copy(sLine, 1, 32); |
||
| 86 | Delete(sLine, 1, 32); |
||
| 87 | sLine := Trim(sLine); |
||
| 88 | if Copy(sLine, 1, 1) = '*' then |
||
| 89 | Delete(sLine, 1, 1); |
||
| 90 | sLine := Trim(sLine); |
||
| 91 | originalFilename := sLine; |
||
| 92 | |||
| 93 | //slOut.Values[originalFilename] := expectedChecksum; // <-- with this, files cannot have an equal sign |
||
| 94 | slOut.OwnsObjects := true; |
||
| 95 | csum := TChecksum.Create; |
||
| 96 | csum.checksum := expectedChecksum; |
||
| 97 | slOut.AddObject(originalFilename, csum); |
||
| 98 | end; |
||
| 99 | finally |
||
| 100 | MyCloseFile(fil); |
||
| 101 | end; |
||
| 102 | end; |
||
| 103 | |||
| 6 | daniel-mar | 104 | { TCheckSumFileMD5 } |
| 105 | |||
| 106 | constructor TCheckSumFileMD5.Create(AFileName: string); |
||
| 107 | begin |
||
| 108 | inherited; |
||
| 109 | fmd5File := AFileName; |
||
| 8 | daniel-mar | 110 | if not SameText(ExtractFileExt(AFileName),'.md5') then |
| 6 | daniel-mar | 111 | raise Exception.Create('Invalid checksum file extension.'); |
| 112 | end; |
||
| 113 | |||
| 114 | function TCheckSumFileMD5.MergeLine(AFileName, ACheckSum: string): string; |
||
| 115 | begin |
||
| 116 | result := ACheckSum + ' *' + AFileName; |
||
| 117 | end; |
||
| 118 | |||
| 119 | function TCheckSumFileMD5.SingleFileChecksum(AFileName: string): string; |
||
| 120 | begin |
||
| 8 | daniel-mar | 121 | result := LowerCase(md5file(AFileName)); |
| 6 | daniel-mar | 122 | end; |
| 123 | |||
| 124 | procedure TCheckSumFileMD5.ToStringList(slOut: TStringList); |
||
| 125 | begin |
||
| 126 | inherited; |
||
| 127 | MD5FileToStringList(fmd5File, slOut); |
||
| 128 | end; |
||
| 129 | |||
| 2 | daniel-mar | 130 | end. |