EVP_CIPHER-SM4(7SSL) OpenSSL EVP_CIPHER-SM4(7SSL)
NAME
EVP_CIPHER-SM4 - The SM4 EVP_CIPHER implementations
DESCRIPTION
Support for SM4 symmetric encryption using the EVP_CIPHER API.
Algorithm Names
The following algorithms are available in the default provider:
"SM4-CBC:SM4"
"SM4-ECB"
"SM4-CTR"
"SM4-OFB" or "SM4-OFB128"
"SM4-CFB" or "SM4-CFB128"
"SM4-GCM"
"SM4-CCM"
"SM4-XTS"
Parameters
This implementation supports the parameters described in "PARAMETERS" in
EVP_EncryptInit(3).
NOTES
The SM4-XTS implementation allows streaming to be performed, but each
EVP_EncryptUpdate(3) or EVP_DecryptUpdate(3) call requires each input to
be a multiple of the blocksize. Only the final EVP_EncryptUpdate() or
EVP_DecryptUpdate() call can optionally have an input that is not a
multiple of the blocksize but is larger than one block. In that case
ciphertext stealing (CTS) is used to fill the block.
SEE ALSO
provider-cipher(7), OSSL_PROVIDER-default(7)
COPYRIGHT
Copyright 2021 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>.
3.5.4 2025-09-30 EVP_CIPHER-SM4(7SSL)
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