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>.