Updated: 2022/Sep/29

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EVP_CIPHER-NULL(7)                  OpenSSL                 EVP_CIPHER-NULL(7)



NAME
       EVP_CIPHER-NULL - The NULL EVP_CIPHER implementation

DESCRIPTION
       Support for a NULL symmetric encryption using the 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.

   Algorithm Name
       The following algorithm is available in the default provider:

       "NULL"

   Parameters
       This implementation supports the following parameters:

       Gettable EVP_CIPHER parameters

       See "Gettable EVP_CIPHER parameters" in EVP_EncryptInit(3)

       Gettable EVP_CIPHER_CTX parameters

       "keylen" (OSSL_CIPHER_PARAM_KEYLEN) <unsigned integer>
       "ivlen" (OSSL_CIPHER_PARAM_IVLEN and <OSSL_CIPHER_PARAM_AEAD_IVLEN)
       <unsigned integer>
       "tls-mac" (OSSL_CIPHER_PARAM_TLS_MAC) <octet ptr>

       See "PARAMETERS" in EVP_EncryptInit(3) for further information.

       Settable EVP_CIPHER_CTX parameters

       "tls-mac-size" (OSSL_CIPHER_PARAM_TLS_MAC_SIZE) <unsigned integer>

       See "PARAMETERS" in EVP_EncryptInit(3) for further information.

CONFORMING TO
       RFC 5246 section-6.2.3.1

SEE ALSO
       provider-cipher(7), OSSL_PROVIDER-default(7)

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
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-05-31                EVP_CIPHER-NULL(7)