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whitelist certain wasms #175

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merged 11 commits into from
Jul 5, 2023
Merged

whitelist certain wasms #175

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fc9a377
whitelist certain wasms
sesi200 Jun 8, 2023
614c237
use backend to hash
sesi200 Jun 9, 2023
3fb6da8
new whitelist approach
sesi200 Jun 13, 2023
5753d67
cleanup
sesi200 Jun 13, 2023
6530356
add to whitelist
sesi200 Jun 13, 2023
3b41e18
fix
sesi200 Jun 13, 2023
775b6b5
fix
sesi200 Jun 13, 2023
143a25e
address code review
sesi200 Jun 23, 2023
cadfdc4
appease CI?
sesi200 Jun 29, 2023
bc91f9d
Merge branch 'main' into severin/wasm-whitelist
sesi200 Jun 30, 2023
84d4f93
next try
sesi200 Jun 30, 2023
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61 changes: 59 additions & 2 deletions service/pool/Main.mo
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Original file line number Diff line number Diff line change
Expand Up @@ -17,26 +17,32 @@ import PoW "./PoW";
import Logs "./Logs";
import Metrics "./Metrics";
import Wasm "canister:wasm-utils";
import Blob "mo:base/Blob";
import Buffer "mo:base/Buffer";
import Nat32 "mo:base/Nat32";
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shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
let IC : ICType.Self = actor "aaaaa-aa";
let params = Option.get(opt_params, Types.defaultParams);
var pool = Types.CanisterPool(params.max_num_canisters, params.canister_time_to_live, params.max_family_tree_size);
let nonceCache = PoW.NonceCache(params.nonce_time_to_live);
var whitelistedWasmHashes = Buffer.Buffer<Nat32>(4);

stable let controller = creator.caller;
stable var stats = Logs.defaultStats;
stable var stablePool : [Types.CanisterInfo] = [];
stable var stableMetadata : [(Principal, (Int, Bool))] = [];
stable var stableChildren : [(Principal, [Principal])] = [];
stable var previousParam : ?Types.InitParams = null;
stable var whitelistedHashes : [Nat32] = [];

system func preupgrade() {
let (tree, metadata, children) = pool.share();
stablePool := tree;
stableMetadata := metadata;
stableChildren := children;
previousParam := ?params;
whitelistedHashes := Buffer.toArray(whitelistedWasmHashes);
};

system func postupgrade() {
Expand All @@ -46,6 +52,7 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
};
};
pool.unshare(stablePool, stableMetadata, stableChildren);
whitelistedWasmHashes := Buffer.fromArray(whitelistedHashes);
};

public query func getInitParams() : async Types.InitParams {
Expand All @@ -65,6 +72,46 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
ignore Cycles.accept amount;
};

public query func getWhitelistedWasmHashes() : async [Nat32] {
Buffer.toArray(whitelistedWasmHashes);
};

public query ({ caller }) func whitelistWasmHash(hash : Nat32) : async () {
if (caller != controller) {
throw Error.reject "Only called by controller";
};
whitelistedWasmHashes.add(hash);
};

public query ({ caller }) func whitelistWasm(wasm : Blob) : async () {
if (caller != controller) {
throw Error.reject "Only called by controller";
};
let hash = Blob.hash(wasm);
whitelistedWasmHashes.add(hash);
};

public query ({ caller }) func removeWhitelistedWasmHash(hash : Nat32) : async () {
if (caller != controller) {
throw Error.reject "Only called by controller";
};
switch (Buffer.indexOf<Nat32>(hash, whitelistedWasmHashes, Nat32.equal)) {
case (?index) ignore whitelistedWasmHashes.remove(index);
case null ();
};
};

public query ({ caller }) func removeWhitelistedWasm(wasm : Blob) : async () {
if (caller != controller) {
throw Error.reject "Only called by controller";
};
let hash = Blob.hash(wasm);
switch (Buffer.indexOf<Nat32>(hash, whitelistedWasmHashes, Nat32.equal)) {
case (?index) ignore whitelistedWasmHashes.remove(index);
case null ();
};
};

private func getExpiredCanisterInfo() : async Types.CanisterInfo {
switch (pool.getExpiredCanisterId()) {
case (#newId) {
Expand Down Expand Up @@ -134,7 +181,12 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
limit_stable_memory_page = ?(16384 : Nat32); // Limit to 1G of stable memory
backend_canister_id = ?Principal.fromActor(this);
};
let wasm = await Wasm.transform(args.wasm_module, config);
let wasm_hash = Blob.hash(args.wasm_module);
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let wasm = if (Buffer.contains<Nat32>(whitelistedWasmHashes, wasm_hash, Nat32.equal)) {
args.wasm_module;
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Do we need to bypass the controller for testing? If so, we only want to bypass when is_whitelisted is true.

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Yes, the bypass is required for testing. But restricting to is_whitelisted is fine

} else {
await Wasm.transform(args.wasm_module, config);
};
let newArgs = {
arg = args.arg;
wasm_module = wasm;
Expand Down Expand Up @@ -359,7 +411,7 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
msg : {
#GCCanisters : Any;
#balance : Any;
#callForward: Any;
#callForward : Any;
#dump : Any;
#getCanisterId : Any;
#getSubtree : Any;
Expand All @@ -370,6 +422,11 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
#removeCode : Any;
#resetStats : Any;
#wallet_receive : Any;
#getWhitelistedWasmHashes : Any;
#whitelistWasmHash : Any;
#whitelistWasm : Any;
#removeWhitelistedWasmHash : Any;
#removeWhitelistedWasm : Any;

#create_canister : Any;
#update_settings : Any;
Expand Down