| =pod |
| |
| =head1 NAME |
| |
| EVP_CIPHER-NULL - The NULL EVP_CIPHER implementation |
| |
| =head1 DESCRIPTION |
| |
| Support for a NULL symmetric encryption using the B<EVP_CIPHER> API. |
| This is used when the TLS cipher suite is TLS_NULL_WITH_NULL_NULL. |
| This does no encryption (just copies the data) and has a mac size of zero. |
| |
| =head2 Algorithm Name |
| |
| The following algorithm is available in the default provider: |
| |
| =over 4 |
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| =item "NULL" |
| |
| =back |
| |
| =head2 Parameters |
| |
| This implementation supports the following parameters: |
| |
| =head3 Gettable EVP_CIPHER parameters |
| |
| See L<EVP_EncryptInit(3)/Gettable EVP_CIPHER parameters> |
| |
| =head3 Gettable EVP_CIPHER_CTX parameters |
| |
| =over 4 |
| |
| =item "keylen" (B<OSSL_CIPHER_PARAM_KEYLEN>) <unsigned integer> |
| |
| =item "ivlen" (B<OSSL_CIPHER_PARAM_IVLEN> and <B<OSSL_CIPHER_PARAM_AEAD_IVLEN>) <unsigned integer> |
| |
| =item "tls-mac" (B<OSSL_CIPHER_PARAM_TLS_MAC>) <octet ptr> |
| |
| =back |
| |
| See L<EVP_EncryptInit(3)/PARAMETERS> for further information. |
| |
| =head3 Settable EVP_CIPHER_CTX parameters |
| |
| =over 4 |
| |
| =item "tls-mac-size" (B<OSSL_CIPHER_PARAM_TLS_MAC_SIZE>) <unsigned integer> |
| |
| =back |
| |
| See L<EVP_EncryptInit(3)/PARAMETERS> for further information. |
| |
| =head1 CONFORMING TO |
| |
| RFC 5246 section-6.2.3.1 |
| |
| =head1 SEE ALSO |
| |
| L<provider-cipher(7)>, L<OSSL_PROVIDER-default(7)> |
| |
| =head1 COPYRIGHT |
| |
| Copyright 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 |
