63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
=pod
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=head1 NAME
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EVP_CIPHER-SM4 - The SM4 EVP_CIPHER implementations
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=head1 DESCRIPTION
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Support for SM4 symmetric encryption using the B<EVP_CIPHER> API.
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=head2 Algorithm Names
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The following algorithms are available in the default provider:
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=over 4
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=item "SM4-CBC:SM4"
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=item "SM4-ECB"
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=item "SM4-CTR"
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=item "SM4-OFB" or "SM4-OFB128"
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=item "SM4-CFB" or "SM4-CFB128"
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=item "SM4-GCM"
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=item "SM4-CCM"
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=item "SM4-XTS"
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=back
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=head2 Parameters
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This implementation supports the parameters described in
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L<EVP_EncryptInit(3)/PARAMETERS>.
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=head1 NOTES
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The SM4-XTS implementation allows streaming to be performed, but each
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L<EVP_EncryptUpdate(3)> or L<EVP_DecryptUpdate(3)> call requires each input
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to be a multiple of the blocksize. Only the final EVP_EncryptUpdate() or
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EVP_DecryptUpdate() call can optionally have an input that is not a multiple
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of the blocksize but is larger than one block. In that case ciphertext
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stealing (CTS) is used to fill the block.
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=head1 SEE ALSO
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L<provider-cipher(7)>, L<OSSL_PROVIDER-default(7)>
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=head1 COPYRIGHT
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Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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