Hi all,
I was surprised that decryption succeeded in GCM mode althought the tag
was shorter than the one produced when encrypting,
as it is not the case in CCM. Is it the intended behaviour ?
In order to rule out a possible bug in my program, I finally used the
example code at :
https://github.com/openssl/openssl/blob/master/demos/evp/aesccm.c
https://github.com/openssl/openssl/blob/master/demos/evp/aesgcm.c
using OpenSSL 1.0.1h.
When altering line 91 of of aesccm.c with 'sizeof(ccm_tag)-1',
decryption failed.
But doing the same with aesgcm.c, line 100 : sizeof(gcm_tag)-10,
decryption succeeded.
Thanks in advance for any assistance with this.
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