On 16 May 2013 14:35, yassine ahmed <[email protected]> wrote: > Ok but for decryption part , based on the example > (http://marc.info/?l=openssl-cvs&m=135042865227553) we need to provide the > authentication tag(gcm-tag or tag) > > i have integrate this code ,how can i get this variable to use it. > The authentication tag is calculated during the encryption operation. It must then be passed along with the encrypted message. The decryption operation requires both parts. It is safe to pass the tag "in the clear".
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