RSA decryption error

VCL TMS Cryptography Pack
1

Hi!

My code:

RSA1:= TRSAEncSign.Create(nil);
RSA1.KeyLength := kl2048;
RSA1.encType := oaep;
RSA1.hashFunction := TRSAhashfunction.sha256;
RSA1.OutputFormat := base64;
RSA1.Unicode := yesUni;
RSA1.FromPrivateKeyFile('D:\TMSCryptoSetupReg\private_key.pem');
Memo1.Text := RSA1.Decrypt(//encrypted text in base64//);
RSA1.Free;

I get an error:

Debugger Exception Notification

Project Test.exe raised exception class ECryptoPack with message 'error : in RSA OAEP, the decryption fails!'.

How to fix it?
Thanks

2

Hi, most likely a format issue. Did you decrypt your PEM private key before using it?

3

Hi,

How and to what format should the Private Key be converted?

RAS encryption is obtained in this way:
RSA1.FromPuplicKeyFile('D:\TMSCryptoSetupReg\public_key.pem');
RSA1.Decrypt( ......

Thanks

4

in the last post I meant
RSA1.Encrypt( ......

I also encrypted it like this:
RSA1.FromPuplicKey('MIIBIjANBgkqhkiG9w0B1298211s2AQEFAA.................');
RSA1.Encrypt( ...
I didn't prepare the key at all,
I used from PEM file as is.

Decryption won't work like that?

Thanks.