fix(schema): fix config schema for authn

apps/emqx_authn/src/enhanced_authn/emqx_enhanced_authn_scram_mnesia.erl

@@ -80,7 +80,7 @@ server_type(type) -> hoconsc:enum(['built-in-database']);
 server_type(default) -> 'built-in-database';
 server_type(_) -> undefined.
 
-algorithm(type) -> hoconsc:enum([sha256, sha256]);
+algorithm(type) -> hoconsc:enum([sha256, sha512]);
 algorithm(default) -> sha256;
 algorithm(_) -> undefined.
 

apps/emqx_authn/src/simple_authn/emqx_authn_mysql.erl

@@ -38,15 +38,29 @@ structs() -> [config].
 fields(config) ->
     [ {server_type,             {enum, [mysql]}}
     , {password_hash_algorithm, fun password_hash_algorithm/1}
-    , {salt_position,           {enum, [prefix, suffix]}}
+    , {salt_position,           fun salt_position/1}
     , {query,                   fun query/1}
     , {query_timeout,           fun query_timeout/1}
     ] ++ emqx_connector_schema_lib:relational_db_fields()
-    ++ emqx_connector_schema_lib:ssl_fields().
+    ++ emqx_connector_schema_lib:ssl_fields();
 
-password_hash_algorithm(type) -> string();
+fields(bcrypt) ->
+    [ {name, {enum, [bcrypt]}}
+    , {salt_rounds, fun salt_rounds/1}
+    ];
+
+fields(other_algorithms) ->
+    [ {name, {enum, [plain, md5, sha, sha256, sha512]}}
+    ].
+
+password_hash_algorithm(type) -> {union, [hoconsc:ref(bcrypt), hoconsc:ref(other_algorithms)]};
+password_hash_algorithm(default) -> #{<<"name">> => sha256};
 password_hash_algorithm(_) -> undefined.
 
+salt_position(type) -> {enum, [prefix, suffix]};
+salt_position(default) -> prefix;
+salt_position(_) -> undefined.
+
 query(type) -> string();
 query(nullable) -> false;
 query(_) -> undefined.