mirror of https://github.com/openssl/openssl
196 lines
5.1 KiB
Plaintext
196 lines
5.1 KiB
Plaintext
=pod
|
|
|
|
=head1 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
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
=for openssl generic
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
const EVP_CIPHER *EVP_ciphername(void)
|
|
|
|
I<EVP_ciphername> is used a placeholder for any of the described cipher
|
|
functions, such as I<EVP_aes_128_cbc>.
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
The AES encryption algorithm for EVP.
|
|
|
|
=over 4
|
|
|
|
=item 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.
|
|
|
|
=item 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.
|
|
|
|
=item 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.
|
|
|
|
=item 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 L<EVP_EncryptInit(3)/AEAD Interface>
|
|
section for details.
|
|
|
|
=item 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.
|
|
|
|
=item 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 (B<EVP_aes_128_xts>) takes input of a 256-bit key to
|
|
achieve AES 128-bit security, and XTS-AES-256 (B<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 L<EVP_EncryptUpdate(3)> call per L<EVP_EncryptInit_ex(3)> call (and
|
|
similarly with the "Decrypt" functions).
|
|
|
|
The I<iv> parameter to L<EVP_EncryptInit_ex(3)> or L<EVP_DecryptInit_ex(3)> is
|
|
the XTS "tweak" value.
|
|
|
|
=back
|
|
|
|
=head1 NOTES
|
|
|
|
Developers should be aware of the negative performance implications of
|
|
calling these functions multiple times and should consider using
|
|
L<EVP_CIPHER_fetch(3)> with L<EVP_CIPHER-AES(7)> instead.
|
|
See L<crypto(7)/Performance> for further information.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
These functions return an B<EVP_CIPHER> structure that contains the
|
|
implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for
|
|
details of the B<EVP_CIPHER> structure.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<evp(7)>,
|
|
L<EVP_EncryptInit(3)>,
|
|
L<EVP_CIPHER_meth_new(3)>
|
|
|
|
=head1 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|
|
|