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b077aed33b
Migrate to OpenSSL 3.0 in advance of FreeBSD 14.0. OpenSSL 1.1.1 (the version we were previously using) will be EOL as of 2023-09-11. Most of the base system has already been updated for a seamless switch to OpenSSL 3.0. For many components we've added `-DOPENSSL_API_COMPAT=0x10100000L` to CFLAGS to specify the API version, which avoids deprecation warnings from OpenSSL 3.0. Changes have also been made to avoid OpenSSL APIs that were already deprecated in OpenSSL 1.1.1. The process of updating to contemporary APIs can continue after this merge. Additional changes are still required for libarchive and Kerberos- related libraries or tools; workarounds will immediately follow this commit. Fixes are in progress in the upstream projects and will be incorporated when those are next updated. There are some performance regressions in benchmarks (certain tests in `openssl speed`) and in some OpenSSL consumers in ports (e.g. haproxy). Investigation will continue for these. Netflix's testing showed no functional regression and a rather small, albeit statistically significant, increase in CPU consumption with OpenSSL 3.0. Thanks to ngie@ and des@ for updating base system components, to antoine@ and bofh@ for ports exp-runs and port fixes/workarounds, and to Netflix and everyone who tested prior to commit or contributed to this update in other ways. PR: 271615 PR: 271656 [exp-run] Relnotes: Yes Sponsored by: The FreeBSD Foundation
69 lines
2.2 KiB
Text
69 lines
2.2 KiB
Text
=pod
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=head1 NAME
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EVP_OpenInit, EVP_OpenUpdate, EVP_OpenFinal - EVP envelope decryption
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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int EVP_OpenInit(EVP_CIPHER_CTX *ctx, EVP_CIPHER *type, unsigned char *ek,
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int ekl, unsigned char *iv, EVP_PKEY *priv);
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int EVP_OpenUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
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int *outl, unsigned char *in, int inl);
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int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
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=head1 DESCRIPTION
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The EVP envelope routines are a high-level interface to envelope
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decryption. They decrypt a public key encrypted symmetric key and
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then decrypt data using it.
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EVP_OpenInit() initializes a cipher context B<ctx> for decryption
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with cipher B<type>. It decrypts the encrypted symmetric key of length
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B<ekl> bytes passed in the B<ek> parameter using the private key B<priv>.
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The IV is supplied in the B<iv> parameter.
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EVP_OpenUpdate() and EVP_OpenFinal() have exactly the same properties
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as the EVP_DecryptUpdate() and EVP_DecryptFinal() routines, as
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documented on the L<EVP_EncryptInit(3)> manual
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page.
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=head1 NOTES
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It is possible to call EVP_OpenInit() twice in the same way as
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EVP_DecryptInit(). The first call should have B<priv> set to NULL
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and (after setting any cipher parameters) it should be called again
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with B<type> set to NULL.
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If the cipher passed in the B<type> parameter is a variable length
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cipher then the key length will be set to the value of the recovered
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key length. If the cipher is a fixed length cipher then the recovered
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key length must match the fixed cipher length.
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=head1 RETURN VALUES
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EVP_OpenInit() returns 0 on error or a non zero integer (actually the
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recovered secret key size) if successful.
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EVP_OpenUpdate() returns 1 for success or 0 for failure.
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EVP_OpenFinal() returns 0 if the decrypt failed or 1 for success.
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=head1 SEE ALSO
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L<evp(7)>, L<RAND_bytes(3)>,
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L<EVP_EncryptInit(3)>,
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L<EVP_SealInit(3)>
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=head1 COPYRIGHT
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Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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