TDCP_sha256 decode hash

TDCP_sha256 decode hash 6 years 4 months ago #11814

Md. Shariful Alam Khan Topic Author Offline Junior Member Posts: 111 Thank you received: 0	Is there a way to decode hash from TDCP_sha256?
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TDCP_sha256 decode hash 6 years 4 months ago #11816

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	Please Sir look at pl_DCP and pl_HashLib4Pascal libraries PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11822

Tigr
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Junior Member
Posts: 54
Thank you received: 1

I think you will find it useful depending on the task!

here is a simple implementation without HMAC:
uses DCPsha256, cHash;

///for cHash
SHA256DigestToHex(CalcSHA256('some text'));////:String

function DigestToStr(Digest: array of byte): string;
var
i: Integer;
begin
Result := '';
for i := 0 to Length(Digest)-1 do
Result := Result + LowerCase(IntToHex(Digest, 2));
end;

function GetStringHash(Source: string): string;
var
Hash: TDCP_sha256;
Digest: array[0..31] of Byte;
begin
Hash := TDCP_sha256.Create(nil);
Hash.Init;
Hash.UpdateStr(Source);
Hash.Final(Digest);
Hash.Free;
Result := DigestToStr(Digest);
end;

File Attachment:

File Name: cDefines.zip
File Size:29 KB

cDefines.zip

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Last edit: by Tigr.

TDCP_sha256 decode hash 6 years 4 months ago #11823

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	Thanks Sir PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11824

Tigr Offline Junior Member Posts: 54 Thank you received: 1	Sternas, I have a question for you of a slightly different nature... Why, when creating an array of strings[64] with above 30 000 000 ide just compiles but does not run the program? ide64, memory 32 GB / / can somewhere that it is necessary to expose? c:array[1..30000000] of string[64]; // I need 50kk (((((
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TDCP_sha256 decode hash 6 years 4 months ago #11825

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	First of all my friend c:array[1..30000000] of string[64]; it's not good programming sample For so big data we use TMemorySream or Streams or TList or TStringsList or a small Database, etc Anyway: Did you try to run your app with NO Debug data ? PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11826

Tigr Offline Junior Member Posts: 54 Thank you received: 1	//if 50kk gdb command: "- exec-run" return an error: ",msg="Error creating process C:\\...\315\356\342\340\377 \357\340\357\352\340\\project1.exe, (error 193).""
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TDCP_sha256 decode hash 6 years 4 months ago #11827

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	Did you try to run your app with NO Debug info ? a simple run ? PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11828

Tigr Offline Junior Member Posts: 54 Thank you received: 1	I run with Debug info
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TDCP_sha256 decode hash 6 years 4 months ago #11829

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	My suggestion is to put your programs in a folder containing no spaces PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11830

Tigr Offline Junior Member Posts: 54 Thank you received: 1	Question on backfill... when TmemoryStream access to read data will be faster than with the array?
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TDCP_sha256 decode hash 6 years 4 months ago #11831

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	Theoretically: NO Practically: YES (if you delete,copy,insert, etc data) PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11832

Tigr Offline Junior Member Posts: 54 Thank you received: 1	Do you have a better solution when working with big data?
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TDCP_sha256 decode hash 6 years 4 months ago #11833

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	My Suggestion for memory Big data, different from each other : TObjectList info or TFPObjectList info PilotLogic Architect and Core Programmer
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TDCP_sha256 decode hash 6 years 4 months ago #11834

Tigr Offline Junior Member Posts: 54 Thank you received: 1	Thanks!
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TDCP_sha256 decode hash 6 years 4 months ago #11835

Tigr Offline Junior Member Posts: 54 Thank you received: 1	c:array of string[64]; If you use a dynamic array, the program works fine! At the moment, more than 30kk have already been filled, this is the result!
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TDCP_sha256 decode hash 6 years 4 months ago #11836

Sternas Stefanos Offline Moderator Ex Pilot, M.Sc, Ph.D Posts: 4535 Thank you received: 1114	Have fun Sir PilotLogic Architect and Core Programmer
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