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docs: Document required output buffer length in EVP_CIPHER-DES

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Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
MergeDate: Sun May  3 13:41:54 2026
(Merged from https://github.com/openssl/openssl/pull/30651)
This commit is contained in:
Joshua Rogers
2026-04-01 00:17:34 +08:00
committed by Norbert Pocs
parent 3ecae5960a
commit 5ff19a7297
1 changed files with 11 additions and 1 deletions
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doc/man7/EVP_CIPHER-DES.pod
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@@ -61,6 +61,16 @@ The following algorithms are available in the legacy provider:
This implementation supports the parameters described in
L<EVP_EncryptInit(3)/PARAMETERS> including "encrypt-check" and "fips-indicator".
=head1 NOTES
The DES3-WRAP implementation does not support streaming. That means to obtain
correct results there can be only one L<EVP_EncryptUpdate(3)> or
L<EVP_DecryptUpdate(3)> call after the initialization of the context.
When wrapping (encrypting) with DES3-WRAP, the output buffer must be at least
I<input_length> + 16 bytes. The extra 16 bytes accommodate an 8-byte IV and an
8-byte integrity check value (ICV) prepended and appended by the algorithm.
=head1 SEE ALSO
L<provider-cipher(7)>, L<OSSL_PROVIDER-FIPS(7)>, L<OSSL_PROVIDER-default(7)>,
@@ -68,7 +78,7 @@ L<OSSL_PROVIDER-legacy(7)>,
=head1 COPYRIGHT
Copyright 2021-2024 The OpenSSL Project Authors. All Rights Reserved.
Copyright 2021-2026 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