Draft compat update

[stef]

conforms to the 1st test vectors specified in https://github.com/cfrg/draft-irtf-cfrg-opaque/blob/cf76da9c4199bd445ac95372d38a81d65eb900d0/poc/vectors/vectors.json

[stef]

incomplete, todo:

• ~fix inline documentation in opaque.h~
• ~add mlock() to all sensitive variables in rewritten code~
• fix bindings (done: python).

[stef]

adapting the bindings

[stef]

for the record if i did not forget anything these are the changes in this branch in comparison to master:

s/crypto_hash_sha256_BYTES/crypto_hash_sha512_BYTES/ everywhere! delete everything related to cfg delete also infos type and replace infos param with (const uint8_t * context, const size_t context_len) remove usage of envu_len, opaque_package_len remove all functions for 1k variants only skS is provided optionally anywhere, pkS is never anymore.

opaque_register

• changed size of uint8_t _rec[OPAQUE_USER_RECORD_LEN] *see also envu_len

recover_credentials:

• does not take pkS as a param anymore
• ~takes an additional pub parameter from createcredentialrequest~
• ids is input only

createcredentialresponse

• the size of sec output parameter changed from OPAQUE_SERVER_AUTH_CTX_LEN to crypto_auth_hmacsha512_BYTES

userAuth

• the size of sec/authU0 input parameter changed from OPAQUE_SERVER_AUTH_CTX_LEN to crypto_auth_hmacsha512_BYTES

CreateRegistrationResponse has an additional skS/server_private_key parameter in 2nd position

FinalizeRequest:

• rec has a different size: OPAQUE_REGISTRATION_RECORD_LEN

StoreUserRecord

• does not take an optional skS param anymore
• takes 1 registration record as input (OPAQUE_REGISTRATION_RECORD_LEN)
• returns 1 user record as output (OPAQUE_USER_RECORD_LEN)

[stef]

all bindings except js are updated.

[stef]

js bindings are also updated and the tests in tests run correctly, however the tests in ../src/test fail for some weird reason. the demo is not yet adapted.