New Behavior observed since (#557) commited

[ashman-p]

We have some test code that setup TLS sessions. Since #557 the ECC hybrid groups started failing with the logs below ...

40420DF601000000:error:068000A8:asn1 encoding routines:asn1_check_tlen:wrong tag:crypto/asn1/tasn_dec.c:1194:
40420DF601000000:error:0688010A:asn1 encoding routines:asn1_item_embed_d2i:nested asn1 error:crypto/asn1/tasn_dec.c:349:Type=X509_ALGOR
40420DF601000000:error:0688010A:asn1 encoding routines:asn1_template_noexp_d2i:nested asn1 error:crypto/asn1/tasn_dec.c:685:Field=algor, Type=X509_PUBKEY

The change was call “d2i_PrivateKey_ex()” instead of "d2i_PrivateKey()” in function oqsx_key_gen_evp_key_kem().
Where libctx = key->libctx is used. Setting libctx = NULL essentially reverts the code and life is happy again.

Note worthy points...

• For failing tests, the library context associated with the test application was different from from key->libctx
• MLKEM###s, X25519MLKEM768, x25519_mlkem512, x448_mlkem768 connected succesfully
• p256_mlkem512, p384_mlkem768, p521_mlkem1024 failed to connect.
• These sessions where initiated by BIO_write()
• Other tests, like OQSProvider tests using create_bare_tls_connection() runs fine.

I am look for any help with insights about these differences.