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

EVP_CIPHER-NULL - The NULL EVP_CIPHER implementation

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.

The following algorithm is available in the default provider:

"NULL"

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.

RFC 5246 section-6.2.3.1

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

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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.

2024-10-23 3.4.0