15-09-2021

Decrypt File Delphi

How To Decrypt File
Decrypt Files Free
Decrypt File Delphi Free

Advanced Encryption Standard(AES) is a symmetric encryption algorithm. AES is the industry standard as of now as it allows 128 bit, 192 bit and 256 bit encryption.Symmetric encryption is very fast as compared to asymmetric encryption and are used in systems such as database system. Following is an online tool to generate AES encrypted password and decrypt AES encrypted password. It provides two mode of encryption and decryption ECB and CBC mode. For more info on AES encryption visit this explanation on AES Encryption.

Delphi Developer. File Encryption components. 2003-08-01 05:41:53 AM delphi91 Hi, Does anyone know of any components or third-party tools that encrypt/decrypt files.
The Delphi Encryption Compendium (DEC) is a cryptographic library for Delphi, C Builder and Free Pascal. It was originally developed by Hagen Reddmann, made compatible with Delphi 2009 by Arvid Winkelsdorf, and has now been ported to Free Pascal. The following changes have been made with respect to the 2008 release.
In last time I worked a lot with crypt algorithmes and today I want to post the new tip with sample code where I'll show how you may crypt and decrypt any file using standard Crypt API which is available in MS Windows. The standard task is to encrypt the file content using some password.
The Delphi Encryption Compendium (DEC) is a cryptographic library for Delphi, C Builder and Free Pascal. It was originally developed by Hagen Reddmann, made compatible with Delphi 2009 by Arvid Winkelsdorf, and has now been ported to Free Pascal. The following changes have been made with respect to the 2008 release.

Hi, I am looking for a Delphi AES encryption/decryption library to decrypt a text which is encrypted using power-shell script. Another application encrypts a text using power-shell and put it into a file. My Delphi application has to read the file and decrypt the string. This is the power-shell script to encrypt ( Powershell encrypt and decrypt.

Also, you can find the sample usage screenshot below:

AES Encrypted Output:

Enter IV Used During Encryption(Optional)

Enter Secret Key

AES Decrypted Output (Base64):

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Usage Guide

Any plain-text input or output that you enter or we generate is not stored on this site, this tool is provided via an HTTPS URL to ensure that text cannot be stolen.

For encryption, you can either enter the plain text, password, an image file or a .txt file that you want to encrypt. Now choose the block cipher mode of encryption. ECB(Electronic Code Book) is the simplest encryption mode and does not require IV for encryption. The input plain text will be divided into blocks and each block will be encrypted with the key provided and hence identical plain text blocks are encrypted into identical cipher text blocks. CBC mode is highly recommended and it requires IV to make each message unique. If no IV is entered then default will be used here for CBC mode and that defaults to a zero based byte[16].

The AES algorithm has a 128-bit block size, regardless of whether you key length is 256, 192 or 128 bits. When a symmetric cipher mode requires an IV, the length of the IV must be equal to the block size of the cipher. Hence, you must always use an IV of 128 bits (16 bytes) with AES.

AES provides 128 bit, 192 bit and 256 bit of secret key size for encryption. Things to remember here is if you are selecting 128 bits for encryption, then the secret key must be of 16 bits long and 24 and 32 bits for 192 and 256 bits of key size. Now you can enter the secret key accordingly. By default, the encrypted text will be base64 encoded but you have options to select the output format as HEX too.

Similarly, for image and .txt file the encrypted form will be Base64 encoded.

Below is a screenshot that shows a sample usage of this online AES encryption tool.

AES decryption has also the same process. By default it assumes the entered text be in Base64. The input can be Base64 encoded or Hex encoded image and .txt file too. And the final decrypted output will be Base64 string. If the intended output is a plain-text then, it can be decoded to plain-text in-place.

But if the intended output is an image or .txt file then you can use this tool to convert the base64 encoded output to an image.

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Other Free Tools

Problem/Question/Abstract:
How to encrypt and decrypt files or strings
Answer:
Here's a simple yet effective encryption function:
unit EZCrypt;
{modeled by Ben Hochstrasser(bhoc@surfeu.ch) after some code snippet from Borland}
interface
uses
Windows, Classes;
type
TWordTriple = array[0..2] of Word;
function FileEncrypt(InFile, OutFile: string; Key: TWordTriple): boolean;
function FileDecrypt(InFile, OutFile: string; Key: TWordTriple): boolean;
function TextEncrypt(const s: string; Key: TWordTriple): string;
function TextDecrypt(const s: string; Key: TWordTriple): string;
function MemoryEncrypt(Src: Pointer; SrcSize: Cardinal; Target: Pointer;
TargetSize: Cardinal; Key: TWordTriple): boolean;
function MemoryDecrypt(Src: Pointer; SrcSize: Cardinal; Target: Pointer;
TargetSize: Cardinal; Key: TWordTriple): boolean;
implementation
function MemoryEncrypt(Src: Pointer; SrcSize: Cardinal; Target: Pointer;
TargetSize: Cardinal; Key: TWordTriple): boolean;
var
pIn, pOut: ^byte;
i: Cardinal;
begin
if SrcSize = TargetSize then
begin
pIn := Src;
pOut := Target;
for i := 1 to SrcSize do
begin
pOut^ := pIn^ xor (Key[2] shr 8);
Key[2] := Byte(pIn^ + Key[2]) * Key[0] + Key[1];
inc(pIn);
inc(pOut);
end;
Result := True;
end
else
Result := False;
end;
function MemoryDecrypt(Src: Pointer; SrcSize: Cardinal; Target: Pointer;
TargetSize: Cardinal; Key: TWordTriple): boolean;
var
pIn, pOut: ^byte;
i: Cardinal;
begin
if SrcSize = TargetSize then
begin
pIn := Src;

How To Decrypt File

pOut := Target;
for i := 1 to SrcSize do
begin
pOut^ := pIn^ xor (Key[2] shr 8);
Key[2] := byte(pOut^ + Key[2]) * Key[0] + Key[1];
inc(pIn);

inc(pOut);
end;
Result := True;
end
else
Result := False;
end;
function TextCrypt(const s: string; Key: TWordTriple; Encrypt: Boolean): string;
var
bOK: Boolean;
begin
SetLength(Result, Length(s));
if Encrypt then
bOK := MemoryEncrypt(PChar(s), Length(s), PChar(Result), Length(Result), Key)
else
bOK := MemoryDecrypt(PChar(s), Length(s), PChar(Result), Length(Result), Key);
if not bOK then
Result := ';

end;
function FileCrypt(InFile, OutFile: string; Key: TWordTriple; Encrypt: Boolean):
boolean;

Decrypt Files Free

var

Decrypt File Delphi Free

MIn, MOut: TMemoryStream;
begin
MIn := TMemoryStream.Create;
MOut := TMemoryStream.Create;
try
MIn.LoadFromFile(InFile);
MOut.SetSize(MIn.Size);
if Encrypt then
Result := MemoryEncrypt(MIn.Memory, MIn.Size, MOut.Memory, MOut.Size, Key)
else
Result := MemoryDecrypt(MIn.Memory, MIn.Size, MOut.Memory, MOut.Size, Key);
MOut.SaveToFile(OutFile);
finally
MOut.Free;
MIn.Free;
end;
end;
function TextEncrypt(const s: string; Key: TWordTriple): string;
begin
Result := TextCrypt(s, Key, True);
end;
function TextDecrypt(const s: string; Key: TWordTriple): string;
begin
Result := TextCrypt(s, Key, False);
end;
function FileEncrypt(InFile, OutFile: string; Key: TWordTriple): boolean;
begin
Result := FileCrypt(InFile, OutFile, Key, True);
end;
function FileDecrypt(InFile, OutFile: string; Key: TWordTriple): boolean;
begin
Result := FileCrypt(InFile, OutFile, Key, False);
end;
end.