Fixes#18586
In order to not break existing applications the OpenSSL documentation
related to SHAKE has been updated.
Background:
All digests algorithms (including XOF's) use the bitlen as the default output length.
This results in a security strength of bitlen / 2.
This means that SHAKE128 will by default have an output length of 16
bytes and a security strength of 64 bits.
For SHAKE256 the default output length is 32 bytes and has a security
strength of 128 bits.
This behaviour was present in 1.1.1 and has been duplicated in the
provider SHAKE algorithms for 3.0.
The SHAKE XOF algorithms have a security strength of
min(bitlen, output xof length in bits / 2).
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18622)
The provider- manuals are meant to describe the general interface for
their respective operation. This is not the place to describe
implementation specific details.
This change creates a number of doc/man7/EVP_MD manuals, one for each
algorithm or set of algorithms, as well as doc/man7/EVP_MD-common.pod
to describe what's common to them all.
While we're at it, correct the SHA3 settable context params array to
match what's actually settable.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11270)
