Implement SCRAM-SHA-256 for server authentication (PG14) (#76)

* Implement SCRAM-SHA-256

* test it

* trace

* move to community for auth

* hmm

.circleci/config.yml

@@ -12,13 +12,15 @@ jobs:
       - image: cimg/rust:1.58.1
         environment:
           RUST_LOG: info
-      - image: cimg/postgres:14.0
-        auth:
-          username: mydockerhub-user
-          password: $DOCKERHUB_PASSWORD
+      - image: postgres:14
+        # auth:
+        #   username: mydockerhub-user
+        #   password: $DOCKERHUB_PASSWORD
         environment:
           POSTGRES_USER: postgres
           POSTGRES_DB: postgres
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_HOST_AUTH_METHOD: scram-sha-256
     # Add steps to the job
     # See: https://circleci.com/docs/2.0/configuration-reference/#steps
     steps:

.circleci/run_tests.sh

@@ -12,7 +12,7 @@ function start_pgcat() {
 }
 
 # Setup the database with shards and user
-psql -e -h 127.0.0.1 -p 5432 -U postgres -f tests/sharding/query_routing_setup.sql
+PGPASSWORD=postgres psql -e -h 127.0.0.1 -p 5432 -U postgres -f tests/sharding/query_routing_setup.sql
 PGPASSWORD=sharding_user pgbench -h 127.0.0.1 -U sharding_user shard0 -i
 PGPASSWORD=sharding_user pgbench -h 127.0.0.1 -U sharding_user shard1 -i
 PGPASSWORD=sharding_user pgbench -h 127.0.0.1 -U sharding_user shard2 -i
@@ -72,7 +72,7 @@ psql -h 127.0.0.1 -p 6432 -d pgbouncer -c "SET client_encoding TO 'utf8'" > /dev
 (! psql -e -h 127.0.0.1 -p 6432 -d random_db -c 'SHOW STATS' > /dev/null)
 
 # Start PgCat in debug to demonstrate failover better
-start_pgcat "debug"
+start_pgcat "trace"
 
 # Add latency to the replica at port 5433 slightly above the healthcheck timeout
 toxiproxy-cli toxic add -t latency -a latency=300 postgres_replica

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pgcat"
-version = "0.1.0-beta2"
+version = "0.2.0-beta1"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
@@ -25,3 +25,7 @@ log = "0.4"
 arc-swap = "1"
 env_logger = "0.9"
 parking_lot = "0.11"
+hmac = "0.12"
+sha2 = "0.10"
+base64 = "0.13"
+stringprep = "0.1"

src/constants.rs

@@ -14,6 +14,13 @@ pub const CANCEL_REQUEST_CODE: i32 = 80877102;
 // AuthenticationMD5Password
 pub const MD5_ENCRYPTED_PASSWORD: i32 = 5;
 
+// SASL
+pub const SASL: i32 = 10;
+pub const SASL_CONTINUE: i32 = 11;
+pub const SASL_FINAL: i32 = 12;
+pub const SCRAM_SHA_256: &str = "SCRAM-SHA-256";
+pub const NONCE_LENGTH: usize = 24;
+
 // AuthenticationOk
 pub const AUTHENTICATION_SUCCESSFUL: i32 = 0;
 

src/main.rs

@@ -54,6 +54,7 @@ mod errors;
 mod messages;
 mod pool;
 mod query_router;
+mod scram;
 mod server;
 mod sharding;
 mod stats;