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Clarify the change of enc -S behavior in 3.0

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Fixes  #19730

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19732)
This commit is contained in:
Viktor Dukhovni 2023-01-24 14:40:57 +01:00 committed by Tomas Mraz
parent b02997c571
commit a4aa977d3a
1 changed files with 13 additions and 0 deletions
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doc/man1/openssl-enc.pod.in
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@ -256,6 +256,19 @@ All RC2 ciphers have the same key and effective key length.
Blowfish and RC5 algorithms use a 128 bit key.
Please note that OpenSSL 3.0 changed the effect of the B<-S> option.
Any explicit salt value specified via this option is no longer prepended to the
ciphertext when encrypting, and must again be explicitly provided when decrypting.
Conversely, when the B<-S> option is used during decryption, the ciphertext
is expected to not have a prepended salt value.
When using OpenSSL 3.0 or later to decrypt data that was encrypted with an
explicit salt under OpenSSL 1.1.1 do not use the B<-S> option, the salt will
then be read from the ciphertext.
To generate ciphertext that can be decrypted with OpenSSL 1.1.1 do not use
the B<-S> option, the salt will be then be generated randomly and prepended
to the output.
=head1 SUPPORTED CIPHERS
Note that some of these ciphers can be disabled at compile time