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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| { | ||
| Author: Raymond van Venetië and Merlijn Wajer | ||
| Project: Simba (https://github.com/MerlijnWajer/Simba) | ||
| License: GNU General Public License (https://www.gnu.org/licenses/gpl-3.0) | ||
| } | ||
| unit simba.hash; | ||
|
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| {$i simba.inc} | ||
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| interface | ||
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| uses | ||
| Classes, SysUtils, | ||
| simba.base; | ||
|
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| type | ||
| {$scopedenums on} | ||
| PHashType = ^EHashType; | ||
| EHashType = ( | ||
| SHA1, SHA256, SHA384, SHA512, | ||
| MD5, | ||
| CRC32 | ||
| ); | ||
| {$scopedenums off} | ||
|
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| TSimbaHasher = class | ||
| protected | ||
| const HexDigits: array[0..15] of Char = '0123456789abcdef'; // lowercase | ||
| class function Hex(Value: Int64; Digits: Integer): string; | ||
| class function Hex(Value: UInt64; Digits: Integer): string; | ||
| public | ||
| constructor Create; virtual; abstract; | ||
| procedure Update(Msg: PByte; Length: Integer); virtual; abstract; | ||
| function Final: String; virtual; abstract; | ||
| end; | ||
| TSimbaHasherClass = class of TSimbaHasher; | ||
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| procedure RegisterHasher(HashType: EHashType; HashClass: TSimbaHasherClass); | ||
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| function HashBuffer(HashType: EHashType; Buf: PByte; Len: PtrUInt): String; | ||
| function HashString(HashType: EHashType; S: String): String; | ||
| function HashFile(HashType: EHashType; FileName: String): String; | ||
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| implementation | ||
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| uses | ||
| simba.hash_sha1, simba.hash_sha256, simba.hash_sha384, simba.hash_sha512, | ||
| simba.hash_md5, | ||
| simba.hash_crc32; | ||
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| var | ||
| Hashers: array[EHashType] of TSimbaHasherClass; | ||
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| procedure RegisterHasher(HashType: EHashType; HashClass: TSimbaHasherClass); | ||
| begin | ||
| Hashers[HashType] := HashClass; | ||
| end; | ||
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| function HashBuffer(HashType: EHashType; Buf: PByte; Len: PtrUInt): String; | ||
| begin | ||
| if (Hashers[HashType] = nil) then | ||
| SimbaException('Hash type not registered'); | ||
|
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| if (Len > 0) then | ||
| with Hashers[HashType].Create() do | ||
| try | ||
| Update(Buf, Len); | ||
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| Result := Final(); | ||
| finally | ||
| Free(); | ||
| end | ||
| else | ||
| Result := ''; | ||
| end; | ||
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| function HashString(HashType: EHashType; S: String): String; | ||
| begin | ||
| if (Length(S) > 0) then | ||
| Result := HashBuffer(HashType, @S[1], Length(S)) | ||
| else | ||
| Result := ''; | ||
| end; | ||
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| function HashFile(HashType: EHashType; FileName: String): String; | ||
| var | ||
| Bytes: TBytes; | ||
| begin | ||
| try | ||
| Bytes := GetFileContents(FileName); | ||
| except | ||
| end; | ||
|
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| if (Length(Bytes) > 0) then | ||
| Result := HashBuffer(HashType, @Bytes[0], Length(Bytes)) | ||
| else | ||
| Result := ''; | ||
| end; | ||
|
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| class function TSimbaHasher.Hex(Value: Int64; Digits: Integer): string; | ||
| var | ||
| i: Integer; | ||
| begin | ||
| if (Digits = 0) then | ||
| Digits := 1; | ||
|
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| SetLength(Result, Digits); | ||
| for i := 0 to Digits - 1 do | ||
| begin | ||
| Result[Digits - i] := HexDigits[Value and 15]; | ||
| Value := Value shr 4; | ||
| end; | ||
|
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| while (Value <> 0) do | ||
| begin | ||
| Result := HexDigits[Value and 15] + Result; | ||
| Value := Value shr 4; | ||
| end; | ||
| end; | ||
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| class function TSimbaHasher.Hex(Value: UInt64; Digits: Integer): string; | ||
| begin | ||
| Result := Hex(Int64(Value), Digits); | ||
| end; | ||
|
|
||
| end. | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| // https://github.com/PascalVault/Lazarus_Hashing | ||
| // | ||
| // Author: domasz | ||
| // Licence: MIT | ||
|
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| unit simba.hash_crc32; | ||
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| {$i simba.inc} | ||
|
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| interface | ||
|
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| uses | ||
| Classes, SysUtils, | ||
| simba.hash; | ||
|
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| type | ||
| THasherCRC32 = class(TSimbaHasher) | ||
| private | ||
| FHash: Cardinal; | ||
| public | ||
| constructor Create; override; | ||
| procedure Update(Msg: PByte; Length: Integer); override; | ||
| function Final: String; override; | ||
| end; | ||
|
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| implementation | ||
|
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| {$R-} | ||
| {$Q-} | ||
|
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| const | ||
| Table: array[0..255] of LongWord = ( | ||
| $00000000, $77073096, $EE0E612C, $990951BA, $076DC419, $706AF48F, $E963A535, $9E6495A3, | ||
| $0EDB8832, $79DCB8A4, $E0D5E91E, $97D2D988, $09B64C2B, $7EB17CBD, $E7B82D07, $90BF1D91, | ||
| $1DB71064, $6AB020F2, $F3B97148, $84BE41DE, $1ADAD47D, $6DDDE4EB, $F4D4B551, $83D385C7, | ||
| $136C9856, $646BA8C0, $FD62F97A, $8A65C9EC, $14015C4F, $63066CD9, $FA0F3D63, $8D080DF5, | ||
| $3B6E20C8, $4C69105E, $D56041E4, $A2677172, $3C03E4D1, $4B04D447, $D20D85FD, $A50AB56B, | ||
| $35B5A8FA, $42B2986C, $DBBBC9D6, $ACBCF940, $32D86CE3, $45DF5C75, $DCD60DCF, $ABD13D59, | ||
| $26D930AC, $51DE003A, $C8D75180, $BFD06116, $21B4F4B5, $56B3C423, $CFBA9599, $B8BDA50F, | ||
| $2802B89E, $5F058808, $C60CD9B2, $B10BE924, $2F6F7C87, $58684C11, $C1611DAB, $B6662D3D, | ||
| $76DC4190, $01DB7106, $98D220BC, $EFD5102A, $71B18589, $06B6B51F, $9FBFE4A5, $E8B8D433, | ||
| $7807C9A2, $0F00F934, $9609A88E, $E10E9818, $7F6A0DBB, $086D3D2D, $91646C97, $E6635C01, | ||
| $6B6B51F4, $1C6C6162, $856530D8, $F262004E, $6C0695ED, $1B01A57B, $8208F4C1, $F50FC457, | ||
| $65B0D9C6, $12B7E950, $8BBEB8EA, $FCB9887C, $62DD1DDF, $15DA2D49, $8CD37CF3, $FBD44C65, | ||
| $4DB26158, $3AB551CE, $A3BC0074, $D4BB30E2, $4ADFA541, $3DD895D7, $A4D1C46D, $D3D6F4FB, | ||
| $4369E96A, $346ED9FC, $AD678846, $DA60B8D0, $44042D73, $33031DE5, $AA0A4C5F, $DD0D7CC9, | ||
| $5005713C, $270241AA, $BE0B1010, $C90C2086, $5768B525, $206F85B3, $B966D409, $CE61E49F, | ||
| $5EDEF90E, $29D9C998, $B0D09822, $C7D7A8B4, $59B33D17, $2EB40D81, $B7BD5C3B, $C0BA6CAD, | ||
| $EDB88320, $9ABFB3B6, $03B6E20C, $74B1D29A, $EAD54739, $9DD277AF, $04DB2615, $73DC1683, | ||
| $E3630B12, $94643B84, $0D6D6A3E, $7A6A5AA8, $E40ECF0B, $9309FF9D, $0A00AE27, $7D079EB1, | ||
| $F00F9344, $8708A3D2, $1E01F268, $6906C2FE, $F762575D, $806567CB, $196C3671, $6E6B06E7, | ||
| $FED41B76, $89D32BE0, $10DA7A5A, $67DD4ACC, $F9B9DF6F, $8EBEEFF9, $17B7BE43, $60B08ED5, | ||
| $D6D6A3E8, $A1D1937E, $38D8C2C4, $4FDFF252, $D1BB67F1, $A6BC5767, $3FB506DD, $48B2364B, | ||
| $D80D2BDA, $AF0A1B4C, $36034AF6, $41047A60, $DF60EFC3, $A867DF55, $316E8EEF, $4669BE79, | ||
| $CB61B38C, $BC66831A, $256FD2A0, $5268E236, $CC0C7795, $BB0B4703, $220216B9, $5505262F, | ||
| $C5BA3BBE, $B2BD0B28, $2BB45A92, $5CB36A04, $C2D7FFA7, $B5D0CF31, $2CD99E8B, $5BDEAE1D, | ||
| $9B64C2B0, $EC63F226, $756AA39C, $026D930A, $9C0906A9, $EB0E363F, $72076785, $05005713, | ||
| $95BF4A82, $E2B87A14, $7BB12BAE, $0CB61B38, $92D28E9B, $E5D5BE0D, $7CDCEFB7, $0BDBDF21, | ||
| $86D3D2D4, $F1D4E242, $68DDB3F8, $1FDA836E, $81BE16CD, $F6B9265B, $6FB077E1, $18B74777, | ||
| $88085AE6, $FF0F6A70, $66063BCA, $11010B5C, $8F659EFF, $F862AE69, $616BFFD3, $166CCF45, | ||
| $A00AE278, $D70DD2EE, $4E048354, $3903B3C2, $A7672661, $D06016F7, $4969474D, $3E6E77DB, | ||
| $AED16A4A, $D9D65ADC, $40DF0B66, $37D83BF0, $A9BCAE53, $DEBB9EC5, $47B2CF7F, $30B5FFE9, | ||
| $BDBDF21C, $CABAC28A, $53B39330, $24B4A3A6, $BAD03605, $CDD70693, $54DE5729, $23D967BF, | ||
| $B3667A2E, $C4614AB8, $5D681B02, $2A6F2B94, $B40BBE37, $C30C8EA1, $5A05DF1B, $2D02EF8D | ||
| ); | ||
|
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| procedure THasherCRC32.Update(Msg: PByte; Length: Integer); | ||
| var i: Integer; | ||
| begin | ||
| for i:=0 to Length-1 do | ||
| begin | ||
| FHash := (FHash shr 8) xor Table[Byte(FHash) xor Msg^]; | ||
| Inc(Msg); | ||
| end; | ||
| end; | ||
|
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| function THasherCRC32.Final: String; | ||
| begin | ||
| FHash := FHash xor $FFFFFFFF; | ||
| Result := Hex(FHash, 8); | ||
| end; | ||
|
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| constructor THasherCRC32.Create; | ||
| begin | ||
| FHash := $FFFFFFFF; | ||
| end; | ||
|
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| initialization | ||
| RegisterHasher(EHashType.CRC32, THasherCRC32); | ||
|
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| end. | ||
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