HELP: Why are there no encryption, decryption example? (AES)

flyfire9 · 2015-07-16 00:38:48

hello everybody:
I need to use AES encryption, decryption, an example of a stream, who can give me a demo code ?
(Using TAESCBC )

alexdmatveev · 2015-07-16 11:18:37

var
  cryptedPassword, rawPassword: RawByteString;
  Key: TSHA256Digest;
begin
...
  rawPassword := password;
  SHA256Weak(MYSQL_PASSWORD_AESKEY, Key);
  cryptedPassword := SynCrypto.AES(Key, 256, rawPassword, true);
  password := BinToBase64(cryptedPassword);
...
end;

MYSQL_PASSWORD_AESKEY - string constrant containing aes key

Please try.
I hope it will be usefull.

flyfire9 · 2015-07-16 13:31:19

thanks,
I need to encrypt and decrypt Tmemorystream, can you help me?

ab · 2015-07-16 15:20:50

Use TRawByteString as defined in SynCommons.pas: it inherits from TCustomMemoryStream, and would work directly from RawByteString variables.

alexdmatveev · 2015-07-16 18:53:49

And pls keep in mind: SynCommons.pas and mORMot AES classes are not crossplatform.

ab · 2015-07-16 21:53:05

alexdmatveev wrote:

And pls keep in mind: SynCommons.pas and mORMot AES classes are not crossplatform.

.... Under Delphi.

But working on Linux (and also Darwin/MacOsX) with FPC.

flyfire9 · 2015-07-17 05:42:42

Thank you for your reply.

Sorry, I have not found TRawByteString , is it TSynMemoryStream ?
I would like to use "AES(CBC)", Is the use "TAESCBC" class ?
my code is :
....
clientdataset.SaveToStream(cds_st,dfBinary);
//encryption

ab · 2015-07-17 05:56:00

TRawByteStringStream class - sorry for the typo.
After a SaveToStream() on this class, use TAESCBC on the DataString method, then create a TRawByteStringStream instance from the encrypted RawByteString.

flyfire9 · 2015-07-17 08:57:23

Is there a method for :
stream(in) -->stream (out encryption) ?

ab · 2015-07-17 09:12:50

Not yet.

flyfire9 · 2015-07-17 13:02:50

Thank you very much.

mORMot Open Source

#1 2015-07-16 00:38:48

HELP: Why are there no encryption, decryption example? (AES)

#2 2015-07-16 11:18:37

Re: HELP: Why are there no encryption, decryption example? (AES)

#3 2015-07-16 13:31:19

Re: HELP: Why are there no encryption, decryption example? (AES)

#4 2015-07-16 15:20:50

Re: HELP: Why are there no encryption, decryption example? (AES)

#5 2015-07-16 18:53:49

Re: HELP: Why are there no encryption, decryption example? (AES)

#6 2015-07-16 21:53:05

Re: HELP: Why are there no encryption, decryption example? (AES)

#7 2015-07-17 05:42:42

Re: HELP: Why are there no encryption, decryption example? (AES)

#8 2015-07-17 05:56:00

Re: HELP: Why are there no encryption, decryption example? (AES)

#9 2015-07-17 08:57:23

Re: HELP: Why are there no encryption, decryption example? (AES)

#10 2015-07-17 09:12:50

Re: HELP: Why are there no encryption, decryption example? (AES)

#11 2015-07-17 13:02:50

Re: HELP: Why are there no encryption, decryption example? (AES)

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