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NAME

       EVP_aes_128_cbc, EVP_aes_192_cbc, EVP_aes_256_cbc, EVP_aes_128_cfb, EVP_aes_192_cfb,
       EVP_aes_256_cfb, EVP_aes_128_cfb1, EVP_aes_192_cfb1, EVP_aes_256_cfb1, EVP_aes_128_cfb8,
       EVP_aes_192_cfb8, EVP_aes_256_cfb8, EVP_aes_128_cfb128, EVP_aes_192_cfb128,
       EVP_aes_256_cfb128, EVP_aes_128_ctr, EVP_aes_192_ctr, EVP_aes_256_ctr, EVP_aes_128_ecb,
       EVP_aes_192_ecb, EVP_aes_256_ecb, EVP_aes_128_ofb, EVP_aes_192_ofb, EVP_aes_256_ofb,
       EVP_aes_128_cbc_hmac_sha1, EVP_aes_256_cbc_hmac_sha1, EVP_aes_128_cbc_hmac_sha256,
       EVP_aes_256_cbc_hmac_sha256, EVP_aes_128_ccm, EVP_aes_192_ccm, EVP_aes_256_ccm,
       EVP_aes_128_gcm, EVP_aes_192_gcm, EVP_aes_256_gcm, EVP_aes_128_ocb, EVP_aes_192_ocb,
       EVP_aes_256_ocb, EVP_aes_128_wrap, EVP_aes_192_wrap, EVP_aes_256_wrap,
       EVP_aes_128_wrap_pad, EVP_aes_192_wrap_pad, EVP_aes_256_wrap_pad, EVP_aes_128_xts,
       EVP_aes_256_xts - EVP AES cipher

SYNOPSIS

        #include <openssl/evp.h>

        const EVP_CIPHER *EVP_ciphername(void)

       EVP_ciphername is used a placeholder for any of the described cipher functions, such as
       EVP_aes_128_cbc.

DESCRIPTION

       The AES encryption algorithm for EVP.

       EVP_aes_128_cbc(), EVP_aes_192_cbc(), EVP_aes_256_cbc(), EVP_aes_128_cfb(),
       EVP_aes_192_cfb(), EVP_aes_256_cfb(), EVP_aes_128_cfb1(), EVP_aes_192_cfb1(),
       EVP_aes_256_cfb1(), EVP_aes_128_cfb8(), EVP_aes_192_cfb8(), EVP_aes_256_cfb8(),
       EVP_aes_128_cfb128(), EVP_aes_192_cfb128(), EVP_aes_256_cfb128(), EVP_aes_128_ctr(),
       EVP_aes_192_ctr(), EVP_aes_256_ctr(), EVP_aes_128_ecb(), EVP_aes_192_ecb(),
       EVP_aes_256_ecb(), EVP_aes_128_ofb(), EVP_aes_192_ofb(), EVP_aes_256_ofb()
           AES for 128, 192 and 256 bit keys in the following modes: CBC, CFB with 128-bit shift,
           CFB with 1-bit shift, CFB with 8-bit shift, CTR, ECB, and OFB.

       EVP_aes_128_cbc_hmac_sha1(), EVP_aes_256_cbc_hmac_sha1()
           Authenticated encryption with AES in CBC mode using SHA-1 as HMAC, with keys of 128
           and 256 bits length respectively. The authentication tag is 160 bits long.

           WARNING: this is not intended for usage outside of TLS and requires calling of some
           undocumented ctrl functions. These ciphers do not conform to the EVP AEAD interface.

       EVP_aes_128_cbc_hmac_sha256(), EVP_aes_256_cbc_hmac_sha256()
           Authenticated encryption with AES in CBC mode using SHA256 (SHA-2, 256-bits) as HMAC,
           with keys of 128 and 256 bits length respectively. The authentication tag is 256 bits
           long.

           WARNING: this is not intended for usage outside of TLS and requires calling of some
           undocumented ctrl functions. These ciphers do not conform to the EVP AEAD interface.

       EVP_aes_128_ccm(), EVP_aes_192_ccm(), EVP_aes_256_ccm(), EVP_aes_128_gcm(),
       EVP_aes_192_gcm(), EVP_aes_256_gcm(), EVP_aes_128_ocb(), EVP_aes_192_ocb(),
       EVP_aes_256_ocb()
           AES for 128, 192 and 256 bit keys in CBC-MAC Mode (CCM), Galois Counter Mode (GCM) and
           OCB Mode respectively. These ciphers require additional control operations to function
           correctly, see the "AEAD Interface" in EVP_EncryptInit(3) section for details.

       EVP_aes_128_wrap(), EVP_aes_192_wrap(), EVP_aes_256_wrap(), EVP_aes_128_wrap_pad(),
       EVP_aes_128_wrap(), EVP_aes_192_wrap(), EVP_aes_256_wrap(), EVP_aes_192_wrap_pad(),
       EVP_aes_128_wrap(), EVP_aes_192_wrap(), EVP_aes_256_wrap(), EVP_aes_256_wrap_pad()
           AES key wrap with 128, 192 and 256 bit keys, as according to RFC 3394 section 2.2.1
           ("wrap") and RFC 5649 section 4.1 ("wrap with padding") respectively.

       EVP_aes_128_xts(), EVP_aes_256_xts()
           AES XTS mode (XTS-AES) is standardized in IEEE Std. 1619-2007 and described in NIST SP
           800-38E. The XTS (XEX-based tweaked-codebook mode with ciphertext stealing) mode was
           designed by Prof. Phillip Rogaway of University of California, Davis, intended for
           encrypting data on a storage device.

           XTS-AES provides confidentiality but not authentication of data. It also requires a
           key of double-length for protection of a certain key size.  In particular, XTS-AES-128
           (EVP_aes_128_xts) takes input of a 256-bit key to achieve AES 128-bit security, and
           XTS-AES-256 (EVP_aes_256_xts) takes input of a 512-bit key to achieve AES 256-bit
           security.

RETURN VALUES

       These functions return an EVP_CIPHER structure that contains the implementation of the
       symmetric cipher. See EVP_CIPHER_meth_new(3) for details of the EVP_CIPHER structure.

SEE ALSO

       evp(7), EVP_EncryptInit(3), EVP_CIPHER_meth_new(3)

COPYRIGHT

       Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the OpenSSL license (the "License").  You may not use this file except in
       compliance with the License.  You can obtain a copy in the file LICENSE in the source
       distribution or at <https://www.openssl.org/source/license.html>.