EVP_AES_128_GCM(3ossl) OpenSSL EVP_AES_128_GCM(3ossl)
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(3), 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>.
3.3.2 2024-09-04 EVP_AES_128_GCM(3ossl)
openssl 3.3.2 - Generated Sat Sep 14 09:25:20 CDT 2024