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Co-authored-by: Roman Volosatovs <roman@profian.com> Signed-off-by: Richard Zak <richard@profian.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| // SPDX-FileCopyrightText: 2022 Profian Inc. <opensource@profian.com> | ||
| // SPDX-License-Identifier: AGPL-3.0-only | ||
|
|
||
| use serde::{Deserialize, Deserializer}; | ||
| use sgx::parameters::{Features, MiscSelect}; | ||
| use validation_common::Measurements; | ||
|
|
||
| #[derive(Clone, Deserialize, Debug, Eq, PartialEq)] | ||
| pub enum SgxFeatures { | ||
| CET, | ||
| Debug, | ||
| EInitKey, | ||
| KSS, | ||
| ProvisioningKey, | ||
| } | ||
|
|
||
| #[derive(Clone, Deserialize, Debug, Eq, PartialEq)] | ||
| pub enum SgxMiscSelect { | ||
| EXINFO, | ||
| } | ||
|
|
||
| #[derive(Clone, Deserialize, Debug, Default, Eq, PartialEq)] | ||
| pub struct Config { | ||
| /// Values for `mrsigner` in the report body, as `Measurements::signer()` | ||
| /// This is the list of public keys which have signed the Enarx binary. | ||
| /// Values for `mrenclave` in the report body, as `Measurements::hash()` | ||
| /// This is the hash of the Enclave environment after the Enarx binary is loaded but | ||
| /// before any workload is loaded, so this is a hash of the Enarx binary in memory. | ||
| #[serde(default, flatten)] | ||
| pub measurements: Measurements<32>, | ||
|
|
||
| /// Values for `features`. | ||
| /// Checked against `sgx::parameters::attributes::Attributes::features()` | ||
| /// These are CPU features reported by the CPU firmware, and most features are not | ||
| /// relevant to security concerns, but are used for code execution. Only the features | ||
| /// relevant for security are parsed here. | ||
| #[serde(default)] | ||
| #[serde(deserialize_with = "from_features")] | ||
| pub features: Features, | ||
|
|
||
| /// Minimum value for `isv_svn`. | ||
| /// Checked against `sgx::report::ReportBody::enclave_security_version()` | ||
| /// This is the security version of the enclave. | ||
| pub enclave_security_version: Option<u16>, | ||
|
|
||
| /// Value for `isv_prodid`, do not allow other ids. | ||
| /// Checked against `sgx::report::ReportBody::enclave_product_id()` | ||
| pub enclave_product_id: Option<u16>, | ||
|
|
||
| /// Extra enclave creation parameters | ||
| /// Checked against `sgx::report::ReportBody::misc_select()` | ||
| #[serde(default)] | ||
| #[serde(deserialize_with = "from_misc_select")] | ||
| pub misc_select: MiscSelect, | ||
| } | ||
|
|
||
| fn from_features<'de, D>(deserializer: D) -> Result<Features, D::Error> | ||
| where | ||
| D: Deserializer<'de>, | ||
| { | ||
| let s: Vec<SgxFeatures> = Deserialize::deserialize(deserializer)?; | ||
|
|
||
| let mut flags = Features::empty(); | ||
|
|
||
| // Must be set according to Intel SGX documentation, this indicates permission | ||
| // to create SGX enclaves. | ||
| flags |= Features::INIT; | ||
|
|
||
| // Required by Enarx, as Wasmtime requires 64-bit, and modern systems are all 64-bit anyway | ||
| flags |= Features::MODE64BIT; | ||
|
|
||
| for flag in s { | ||
| match flag { | ||
| SgxFeatures::CET => { | ||
| flags |= Features::CET; | ||
| } | ||
| SgxFeatures::Debug => { | ||
| flags |= Features::DEBUG; | ||
| } | ||
| SgxFeatures::EInitKey => { | ||
| flags |= Features::EINIT_KEY; | ||
| } | ||
| SgxFeatures::KSS => { | ||
| flags |= Features::KSS; | ||
| } | ||
| SgxFeatures::ProvisioningKey => { | ||
| flags |= Features::PROVISIONING_KEY; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| Ok(flags) | ||
| } | ||
|
|
||
| fn from_misc_select<'de, D>(deserializer: D) -> Result<MiscSelect, D::Error> | ||
| where | ||
| D: Deserializer<'de>, | ||
| { | ||
| let s: Vec<SgxMiscSelect> = Deserialize::deserialize(deserializer)?; | ||
|
|
||
| let mut flags = MiscSelect::default(); | ||
|
|
||
| for flag in s { | ||
| match flag { | ||
| SgxMiscSelect::EXINFO => { | ||
| flags |= MiscSelect::EXINFO; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| Ok(flags) | ||
| } | ||
|
|
||
| #[cfg(test)] | ||
| mod tests { | ||
| use super::*; | ||
| use std::collections::HashSet; | ||
| use validation_common::Digest; | ||
|
|
||
| #[test] | ||
| fn empty_config() { | ||
| assert!(toml::from_str::<Config>("").is_err()); | ||
| } | ||
|
|
||
| #[test] | ||
| fn serde() { | ||
| const SIGNER: &str = | ||
| r#"signer = ["2eba0f494f428e799c22d6f12778aebea4dc8d991f9e63fd3cddd57ac6eb5dd9"]"#; | ||
|
|
||
| let signer: HashSet<_> = vec![Digest([ | ||
| 0x2e, 0xba, 0x0f, 0x49, 0x4f, 0x42, 0x8e, 0x79, 0x9c, 0x22, 0xd6, 0xf1, 0x27, 0x78, | ||
| 0xae, 0xbe, 0xa4, 0xdc, 0x8d, 0x99, 0x1f, 0x9e, 0x63, 0xfd, 0x3c, 0xdd, 0xd5, 0x7a, | ||
| 0xc6, 0xeb, 0x5d, 0xd9, | ||
| ])] | ||
| .into_iter() | ||
| .collect(); | ||
|
|
||
| let config: Config = toml::from_str(&format!( | ||
| r#" | ||
| {SIGNER} | ||
| features = ["Debug"] | ||
| misc_select = ["EXINFO"] | ||
| "#, | ||
| )) | ||
| .expect("Couldn't deserialize"); | ||
|
|
||
| assert_eq!(config.measurements.signer, signer); | ||
| assert_eq!( | ||
| config.features.bits(), | ||
| (Features::DEBUG | Features::INIT | Features::MODE64BIT).bits() | ||
| ); | ||
| assert!(config.misc_select.contains(MiscSelect::EXINFO)); | ||
| } | ||
|
|
||
| #[test] | ||
| fn too_short() { | ||
| let config: Result<Config, toml::de::Error> = toml::from_str( | ||
| r#" | ||
| signer = ["41c179d5c0d5bc4915752ccf9bbd2baa574716832235ef5bb998fadcda1e46"] | ||
| "#, | ||
| ); | ||
| assert!(config.is_err()); | ||
| } | ||
| } |
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