Adds const qualifier to ciphertext parameter in EVP_PKEY_decapsulate

[maddeleine]

Issues:

N/A

Description of changes:

Adds a const qualifier to the ciphertext parameter in the EVP_PKEY_decapsulate API. This seems to match the internal implementation of decapsulate.

Call-outs:

N/A

Testing:

I didn't see any tests fail for this change? Maybe I missed something...

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.25%. Comparing base (9431f99) to head (e5a26fb).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1713   +/-   ##
=======================================
  Coverage   78.24%   78.25%           
=======================================
  Files         571      571           
  Lines       95699    95698    -1     
  Branches    13726    13726           
=======================================
+ Hits        74884    74886    +2     
  Misses      20207    20207           
+ Partials      608      605    -3     

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[justsmth]

The "decapsulate" function it's passed to also declares it a const value:

aws-lc/crypto/fipsmodule/evp/internal.h

Line 303 in c65d98a

const uint8_t *ciphertext, size_t ciphertext_len);