[openssl-dev] [openssl.org #4161] Bug : aes-128-ccm cipher mode not working

[Prashant Dhange via RT]

Hi,

We are trying to generate CMAC authentication code using  EVP_aes_128_ccm
mode. The CMAC_Final function returning the single byte hash code which
suppose to return 16-byte hash code.

We tried same algorithm with EVP_aes_128_cbc mode which is returning
16-byte hash code but we have specific requirement for EVP_aes_128_ccm mode.

Here is the sample code snippet for CMAC generation:
{{{
    ctx = CMAC_CTX_new();

    CMAC_Init(ctx, key, key_len, EVP_aes_128_ccm(), NULL);


    CMAC_Update(ctx, d, n);

    CMAC_Final(ctx, md, &md_len);

    CMAC_CTX_free(ctx);
}}}

Kindly provide us inputs on this issue.

Thanks,
~Prashant.

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