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_192_wrap_pad(), 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.

           The XTS implementation in OpenSSL does not  support  streaming.  That  is  there  must  only  be  one
           EVP_EncryptUpdate(3)   call   per  EVP_EncryptInit_ex(3)  call  (and  similarly  with  the  "Decrypt"
           functions).

           The iv parameter to EVP_EncryptInit_ex(3) or EVP_DecryptInit_ex(3) is the XTS "tweak" value.

NOTES

       Developers should be aware of the negative performance implications of calling these  functions  multiple
       times and should consider using EVP_CIPHER_fetch(3) with EVP_CIPHER-AES(7) instead.  See "Performance" in
       crypto(7) for further information.

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 2017-2023 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (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>.

3.0.13                                             2025-02-05                              EVP_AES_128_GCM(3SSL)