Hello,

[EMAIL PROTECTED] wrote on 06/03/2008 04:40:10 AM:

> Dear Sir/Madam,
> 
> I'm currently using Crypt::OpenSSL::RSA module with perl linking with 
OpenSSL 0.9.8h to 
> encrypt/decrypt message and transport over HTTP POST request to Java 
application on the 
> other side.  When Encrypting with the given public key, Java application 
can receive the
> data perfectly.  But when Java side encrypt message with private key 
(which is the pair 
> for our public key), and reply back, we found the following error while 
trying to decrypt message:
> 
> RSA.xs:202: OpenSSL error: block type is not 01 at ...
> 
> Please kindly suggest how we could get around this issue.
> 
> Currently, we use PKCS1 padding.  Please kindly see below for our perl 
script used.
> 
>   $RSA_Decrypt = Crypt::OpenSSL::RSA->new_public_key( $PublicKey );
>   $RSA_Decrypt->use_pkcs1_padding();
>   my $TmpText = decode_base64( $CipherText );
> 
>   my $PlainText = $RSA_Decrypt->public_decrypt( $TmpText ); 
>   #--> Error on the line above
Double check that public key used to decrypt java message is really pair
to private key on encryption side.

You may use NO PADDING and look at decrypted data to check that this data
looks reasonable or not.

You should consider also that data encrypted with private key may by 
decrypted
by anyone with public key (if public key is really public).

Best regards,
--
Marek Marcola <[EMAIL PROTECTED]>

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