73 lines
1.6 KiB
Plaintext
73 lines
1.6 KiB
Plaintext
=pod
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=head1 NAME
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EVP_CIPHER-NULL - The NULL EVP_CIPHER implementation
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=head1 DESCRIPTION
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Support for a NULL symmetric encryption using the B<EVP_CIPHER> API.
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This is used when the TLS cipher suite is TLS_NULL_WITH_NULL_NULL.
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This does no encryption (just copies the data) and has a mac size of zero.
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=head2 Algorithm Name
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The following algorithm is available in the default provider:
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=over 4
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=item "NULL"
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=back
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=head2 Parameters
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This implementation supports the following parameters:
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=head3 Gettable EVP_CIPHER parameters
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See L<EVP_EncryptInit(3)/Gettable EVP_CIPHER parameters>
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=head3 Gettable EVP_CIPHER_CTX parameters
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=over 4
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=item "keylen" (B<OSSL_CIPHER_PARAM_KEYLEN>) <unsigned integer>
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=item "ivlen" (B<OSSL_CIPHER_PARAM_IVLEN> and <B<OSSL_CIPHER_PARAM_AEAD_IVLEN>) <unsigned integer>
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=item "tls-mac" (B<OSSL_CIPHER_PARAM_TLS_MAC>) <octet ptr>
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=back
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See L<EVP_EncryptInit(3)/PARAMETERS> for further information.
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=head3 Settable EVP_CIPHER_CTX parameters
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=over 4
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=item "tls-mac-size" (B<OSSL_CIPHER_PARAM_TLS_MAC_SIZE>) <unsigned integer>
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=back
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See L<EVP_EncryptInit(3)/PARAMETERS> for further information.
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=head1 CONFORMING TO
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RFC 5246 section-6.2.3.1
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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 2023 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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