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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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18 changes: 14 additions & 4 deletions service/pool/Main.mo
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,9 @@ 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";
Expand Down Expand Up @@ -119,7 +122,7 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
await getExpiredCanisterInfo();
};

public func installCode(info : Types.CanisterInfo, args : Types.InstallArgs, profiling : Bool) : async Types.CanisterInfo {
public shared ({ caller }) func installCode(info : Types.CanisterInfo, args : Types.InstallArgs, profiling : Bool, is_whitelisted : Bool) : async Types.CanisterInfo {
if (info.timestamp == 0) {
stats := Logs.updateStats(stats, #mismatch);
throw Error.reject "Cannot install removed canister";
Expand All @@ -134,7 +137,13 @@ 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 = if (caller == controller) {
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 if (is_whitelisted) {
await Wasm.is_whitelisted(args.wasm_module);
} else {
await Wasm.transform(args.wasm_module, config);
};
let newArgs = {
arg = args.arg;
wasm_module = wasm;
Expand Down Expand Up @@ -290,11 +299,12 @@ shared (creator) actor class Self(opt_params : ?Types.InitParams) = this {
wasm_module : ICType.wasm_module;
mode : { #reinstall; #upgrade; #install };
canister_id : ICType.canister_id;
is_whitelisted : Bool;
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This is a wrapper for the management canister, so we cannot change the interface. We can set this to false, as it's only used by the canister to spawn child canisters.

}) : async () {
switch (sanitizeInputs(caller, canister_id)) {
case (#ok info) {
let args = { arg; wasm_module; mode; canister_id };
ignore await installCode(info, args, pool.profiling caller); // inherit the profiling of the parent
ignore await installCode(info, args, pool.profiling caller, is_whitelisted); // inherit the profiling of the parent
};
case (#err makeMsg) throw Error.reject(makeMsg "install_code");
};
Expand Down Expand Up @@ -359,7 +369,7 @@ 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 Down
2 changes: 2 additions & 0 deletions service/wasm-utils/Cargo.lock
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2 changes: 2 additions & 0 deletions service/wasm-utils/Cargo.toml
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Expand Up @@ -8,12 +8,14 @@ path = "lib.rs"
crate-type = ["cdylib"]

[dependencies]
hex = "0.4.3"
ic-cdk = "0.8.0-beta.0"
ic-cdk-macros = "0.8.0-beta.0"
serde = "1.0"
serde_bytes = "0.11"
candid = "0.9.0-beta.2"
ic-wasm = { version = "0.3.7", default-features = false }
sha2 = "0.10.6"
walrus = "0.19"

[profile.release]
Expand Down
15 changes: 15 additions & 0 deletions service/wasm-utils/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ use candid::{CandidType, Deserialize};
use serde_bytes::ByteBuf;

use ic_wasm::*;
use sha2::Digest;

#[derive(CandidType, Deserialize)]
struct Config {
Expand All @@ -11,6 +12,20 @@ struct Config {
backend_canister_id: Option<candid::Principal>,
}

const WHITELISTED_WASMS: [&str; 1] = [
"651425d92d3796ddae581191452e0e87484eeff4ff6352fe9a59c7e1f97a2310", // dfx 0.14.1 frontend canister
];

#[ic_cdk_macros::query]
fn is_whitelisted(wasm: ByteBuf) -> ByteBuf {
let wasm_hash = hex::encode(sha2::Sha256::digest(&wasm));
if WHITELISTED_WASMS.contains(&wasm_hash.as_str()) {
wasm
} else {
ic_cdk::trap("Wasm is not whitelisted")
}
}

#[ic_cdk_macros::query]
fn transform(wasm: ByteBuf, config: Config) -> ByteBuf {
let mut m = walrus::Module::from_buffer(&wasm).unwrap();
Expand Down
10 changes: 8 additions & 2 deletions service/wasm-utils/wasm-utils.did
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@@ -1,5 +1,11 @@
type Config = record { profiling: bool; remove_cycles_add: bool; limit_stable_memory_page: opt nat32; backend_canister_id: opt principal};
type Config = record {
profiling : bool;
remove_cycles_add : bool;
limit_stable_memory_page : opt nat32;
backend_canister_id : opt principal;
};

service : {
transform : (blob, Config) -> (blob);
transform : (blob, Config) -> (blob) query;
is_whitelisted : (blob) -> (blob) query;
}