[openssl-users] FIPS: Converting AES_ctr128_encrypt() to EVP_ methods

Dr. Stephen Henson steve at openssl.org
Mon Mar 16 18:19:17 UTC 2015

On Mon, Mar 16, 2015, jonetsu wrote:

> Hello,
> An application that needs converting to FIPS is currently using
> AES_ctr128_encrypt().  That function calls in turn
> CRYPTO_ctr128_encrypt() which then does some internal
> computations.  They are not documented in the 'full list of
> crypto APIs'.  What would be the FIPS-compatible EVP
> equivalent(s) ?

The EVP cipher is called EVP_aes_128_ctr(): once you pass that as the
EVP_CIPHER argument (for example to EVP_EncryptInit_ex) you can use EVP like
any other cipher.

Dr Stephen N. Henson. OpenSSL project core developer.
Commercial tech support now available see: http://www.openssl.org

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