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evp: process key length and iv length early if present
evp_cipher_init_internal() takes a params array argument and this is processed
late in the initialisation process for some ciphers (AEAD ones).
This means that changing the IV length as a parameter will either truncate the
IV (very bad if SP 800-38d section 8.2.1 is used) or grab extra uninitialised
bytes.
Truncation is very bad if SP 800-38d section 8.2.1 is being used to
contruct a deterministic IV. This leads to an instant loss of confidentiality.
Grabbing extra bytes isn't so serious, it will most likely result in a bad
decryption.
Problem reported by Tony Battersby of Cybernetics.com but earlier discovered
and raised as issue #19822.
Fixes CVE-2023-5363Fixes#19822
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 5f69f5c)
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