Cipher list context that support FIPS crypto library

[ramkumarpvs]

What should be the cipher list for aws_tls_cipher_pref that support FIPS mode crypto library like OpenSSL or BSafe?

Looks like default list
AWS_IO_TLS_CIPHER_PREF_SYSTEM_DEFAULT which would be set has FIPS support issues while using Aws::Crt::Io::TlsContextOptions::InitClientWithMtls API.

[ramkumarpvs]

@jannostern , @dagnir , @bretambrose , @hyandell
Do you have any information on the question ?

[bretambrose]

As it currently stands there is no FIPS-specific support in the CRT or its supporting libraries. FIPS suport via s2n/aws-lc is planned but I don't have any timeline. If you're using a FIPS-compliant openssl (rather than aws-lc) then you may want to ask a similar question on the s2n repository; I certainly do not have enough background to give any correct guidance on that matter.