feat: Crypt4GH support using LocalStorage

data/c4gh/README.md

@@ -0,0 +1,34 @@
+# Crypt4GH example file
+
+This is just a customised summary for htsget-rs. Please refer to the official [`crypt4gh-rust` documentation](https://ega-archive.github.io/crypt4gh-rust) for further information.
+
+## Keygen
+
+```sh
+cargo install crypt4gh
+crypt4gh keygen --sk keys/alice.sec --pk keys/alice.pub
+crypt4gh keygen --sk keys/bob.sec --pk keys/bob.pub
+```
+
+## Encrypt
+```
+crypt4gh encrypt --sk keys/alice.sec --recipient_pk keys/bob.pub < htsnexus_test_NA12878.bam > htsnexus_test_NA12878.bam.c4gh
+```
+
+## Decrypt
+
+```sh
+crypt4gh decryptor --range 0-65535 --sk data/crypt4gh/keys/bob.sec \
+                                 --sender-pk data/crypt4gh/keys/alice.pub \
+                                 < data/crypt4gh/htsnexus_test_NA12878.bam.c4gh \
+                                 > out.bam
+
+samtools view out.bam
+(...)
+SRR098401.61822403	83	11	5009470	60	76M	=	5009376	-169	TCTTCTTGCCCTGGTGTTTCGCCGTTCCAGTGCCCCCTGCTGCAGACCATAAAGGATGGGACTTTGTTGAGGTAGG	?B6BDCD@I?JFI?FHHFEAIIAHHDIJHHFIIIIIJEIIFIJGHCIJDDEEHHHDEHHHCIGGEGFDGFGFBEDC	X0:i:1	X1:i:0	MD:Z:76	RG:Z:SRR098401	AM:i:37	NM:i:0	SM:i:37	MQ:i:60	XT:A:U	BQ:Z:@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@B
+
+samtools view: error reading file "out.bam"
+samtools view: error closing "out.bam": -1
+```
+
+The last samtools view error suggests that the returned bytes do not include BAM file termination.

data/c4gh/keys/alice.pub

@@ -0,0 +1,3 @@
+-----BEGIN CRYPT4GH PUBLIC KEY-----
+ToQrpj4UfuLgxZRe1wSGIZtXC19fOEHUHe3RQy63qwM=
+-----END CRYPT4GH PUBLIC KEY-----

data/c4gh/keys/alice.sec

@@ -0,0 +1,3 @@
+-----BEGIN CRYPT4GH PRIVATE KEY-----
+YzRnaC12MQAEbm9uZQAEbm9uZQAgxi4tNmUO++HAApv9ryZB9S8QfqrWKKe5CunJuChH5vU=
+-----END CRYPT4GH PRIVATE KEY-----

data/c4gh/keys/bob.pub

@@ -0,0 +1,3 @@
+-----BEGIN CRYPT4GH PUBLIC KEY-----
+TyKEXZPnfon6dj1kRXl6HumfZDzo/h60RIc8Wd0Ig2s=
+-----END CRYPT4GH PUBLIC KEY-----

data/c4gh/keys/bob.sec

@@ -0,0 +1,3 @@
+-----BEGIN CRYPT4GH PRIVATE KEY-----
+YzRnaC12MQAEbm9uZQAEbm9uZQAg6uLXNqcXAi6FRKzRBk2KBKF4BnmueySZv5MGzKjIPcI=
+-----END CRYPT4GH PRIVATE KEY-----

htsget-actix/Cargo.toml

@@ -13,6 +13,13 @@ repository = "https://github.com/umccr/htsget-rs"
 [features]
 s3-storage = ["htsget-config/s3-storage", "htsget-search/s3-storage", "htsget-http/s3-storage", "htsget-axum/s3-storage", "htsget-test/s3-storage"]
 url-storage = ["htsget-config/url-storage", "htsget-search/url-storage", "htsget-http/url-storage", "htsget-axum/url-storage", "htsget-test/url-storage"]
+c4gh-experimental = [
+    "htsget-config/c4gh-experimental",
+    "htsget-search/c4gh-experimental",
+    "htsget-http/c4gh-experimental",
+    "htsget-axum/c4gh-experimental",
+    "htsget-test/c4gh-experimental"
+]
 default = []
 
 [dependencies]

htsget-actix/README.md

@@ -50,6 +50,7 @@ are exposed in the public API.
 This crate has the following features:
 * `s3-storage`: used to enable `S3Storage` functionality.
 * `url-storage`: used to enable `UrlStorage` functionality.
+* `c4gh-experimental`: used to enable `C4GHStorage` functionality.
 
 ## Benchmarks
 Benchmarks for this crate written using [Criterion.rs][criterion-rs], and aim to compare the performance of this crate with the

htsget-actix/benches/request_benchmarks.rs

@@ -12,7 +12,8 @@ use serde::{Deserialize, Serialize};
 
 use htsget_config::types::{Headers, JsonResponse};
 use htsget_http::{PostRequest, Region};
-use htsget_test::http::{default_config_fixed_port, default_dir, default_dir_data};
+use htsget_test::http::default_config_fixed_port;
+use htsget_test::util::{default_dir, default_dir_data};
 
 const REFSERVER_DOCKER_IMAGE: &str = "ga4gh/htsget-refserver:1.5.0";
 const BENCHMARK_DURATION_SECONDS: u64 = 30;

htsget-actix/src/lib.rs

@@ -10,16 +10,12 @@ use tracing_actix_web::TracingLogger;
 use htsget_config::config::cors::CorsConfig;
 pub use htsget_config::config::{Config, DataServerConfig, ServiceInfo, TicketServerConfig, USAGE};
 pub use htsget_config::storage::Storage;
-use htsget_search::from_storage::HtsGetFromStorage;
 use htsget_search::HtsGet;
-use htsget_search::LocalStorage;
 
 use crate::handlers::{get, post, reads_service_info, variants_service_info, HttpVersionCompat};
 
 pub mod handlers;
 
-pub type HtsGetStorage<T> = HtsGetFromStorage<LocalStorage<T>>;
-
 /// Represents the actix app state.
 pub struct AppState<H: HtsGet> {
   pub htsget: Arc<H>,

htsget-axum/Cargo.toml

@@ -15,12 +15,20 @@ s3-storage = [
     "htsget-config/s3-storage",
     "htsget-search/s3-storage",
     "htsget-test/s3-storage",
-    "htsget-test/aws-mocks"
+    "htsget-test/aws-mocks",
+    "htsget-http/s3-storage"
 ]
 url-storage = [
     "htsget-config/url-storage",
     "htsget-search/url-storage",
-    "htsget-test/url-storage"
+    "htsget-test/url-storage",
+    "htsget-http/url-storage"
+]
+c4gh-experimental = [
+    "htsget-config/c4gh-experimental",
+    "htsget-search/c4gh-experimental",
+    "htsget-test/c4gh-experimental",
+    "htsget-http/c4gh-experimental"
 ]
 default = []
 

htsget-axum/README.md

@@ -110,6 +110,7 @@ htsget-rs. It also contains the data block server which fetches data from a `Loc
 This crate has the following features:
 * `s3-storage`: used to enable `S3Storage` functionality.
 * `url-storage`: used to enable `UrlStorage` functionality.
+* `c4gh-experimental`: used to enable `C4GHStorage` functionality.
 
 ## License
 

htsget-config/Cargo.toml

@@ -13,6 +13,7 @@ repository = "https://github.com/umccr/htsget-rs"
 [features]
 s3-storage = []
 url-storage = ["dep:reqwest"]
+c4gh-experimental = ["dep:crypt4gh"]
 default = []
 
 [dependencies]
@@ -37,6 +38,9 @@ rustls-pki-types = "1"
 # url-storage
 reqwest = { version = "0.12", features = ["rustls-tls"], default-features = false, optional = true }
 
+# Crypt4GH
+crypt4gh = { version = "0.4", git = "https://github.com/EGA-archive/crypt4gh-rust", optional = true }
+
 [dev-dependencies]
 serde_json = "1"
 figment = { version = "0.10", features = ["test"] }

htsget-config/README.md

@@ -488,6 +488,40 @@ addressing by setting the `MINIO_DOMAIN` environment variable. [Path][path-addre
 
 See the MinIO deployment [example][minio-deployment] for more information on how to configure htsget-rs and MinIO.
 
+### Crypt4GH
+
+There is experimental support for serving [Crypt4GH][c4gh] encrypted files. This can be enabled by compiling with the 
+`c4gh-experimental` feature flag.
+
+This allows htsget-rs to read Crypt4GH files and serve them encrypted, directly to the client. In the process of
+serving the data, htsget-rs will decrypt the headers of the Crypt4GH files and reencrypt them so that the client can read
+them. When the client receives byte ranges from htsget-rs and concatenates them, the output bytes will be Crypt4GH encrypted,
+and will need to be decrypted before they can be read. All file formats (BAM, CRAM, VCF, and BCF) are supported using Crypt4GH.
+
+To use this feature, an additional config option called `object_type` under `resolvers.storage` is required,
+which allows specifying the private and public keys:
+
+| Option                 | Description                                                                                                                                                              | Type              | Default |
+|------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------|---------|
+| `private_key`          | The path to private key which htsget-rs uses to decrypt Crypt4GH data.                                                                                                   | Filesystem path   | Not Set | 
+| `recipient_public_key` | The path to the public key which the recipient of the data will use. This is what the client will use to decrypt the returned data, using the corresponding private key. | Filesystem path   | Not Set |
+
+For example:
+
+```toml
+[[resolvers]]
+regex = ".*"
+substitution_string = "$0"
+
+[resolvers.storage]
+object_type = { private_key = "data/c4gh/keys/bob.sec", recipient_public_key = "data/c4gh/keys/alice.pub" } # pragma: allowlist secret
+```
+
+The htsget-rs server expects the Crypt4GH file to end with `.c4gh`, and the index file to be unencrypted. See the [`data/c4gh`][data-c4gh] for examples of file structure.
+
+> [!NOTE]  
+> This option is currently only supported for `LocalStorage`. The `object_type` will not have an effect if using `S3Storage` or `UrlStorage`.
+
 ### As a library
 
 This crate reads config files and environment variables using [figment], and accepts command-line arguments using clap. The main function for this is `from_config`,
@@ -501,6 +535,7 @@ regex, and changing it by using a substitution string.
 This crate has the following features:
 * `s3-storage`: used to enable `S3Storage` functionality.
 * `url-storage`: used to enable `UrlStorage` functionality.
+* `c4gh-experimental`: used to enable `C4GHStorage` functionality.
 
 ## License
 
@@ -511,4 +546,6 @@ This project is licensed under the [MIT license][license].
 [virtual-addressing]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/VirtualHosting.html#virtual-hosted-style-access
 [minio-deployment]: ../deploy/examples/minio/README.md
 [license]: LICENSE
-[minio]: https://min.io/
+[minio]: https://min.io/
+[c4gh]: https://samtools.github.io/hts-specs/crypt4gh.pdf
+[data-c4gh]: ../data/c4gh

htsget-config/examples/config-files/c4gh.toml

@@ -0,0 +1,12 @@
+# An example of running htsget-rs with Crypt4GH enabled.
+# Run with `cargo run -p htsget-axum --features c4gh-experimental -- --config htsget-config/examples/config-files/c4gh.toml`
+
+ticket_server_addr = "127.0.0.1:8080"
+data_server_addr = "127.0.0.1:8081"
+
+[[resolvers]]
+regex = ".*"
+substitution_string = "$0"
+
+[resolvers.storage]
+object_type = { private_key = "data/c4gh/keys/bob.sec", recipient_public_key = "data/c4gh/keys/alice.pub" } # pragma: allowlist secret

htsget-config/src/resolver.rs

@@ -484,6 +484,7 @@ mod tests {
       Authority::from_static("127.0.0.1:8080"),
       "data".to_string(),
       "/data".to_string(),
+      Default::default(),
     );
     let resolver = Resolver::new(
       Storage::Local { local_storage },

htsget-config/src/storage/local.rs

@@ -4,6 +4,7 @@ use http::uri::Authority;
 use serde::{Deserialize, Serialize};
 
 use crate::config::{default_localstorage_addr, default_path, DataServerConfig};
+use crate::storage::object::ObjectType;
 use crate::tls::KeyPairScheme;
 use crate::types::Scheme;
 
@@ -23,6 +24,7 @@ pub struct LocalStorage {
   authority: Authority,
   local_path: String,
   path_prefix: String,
+  object_type: ObjectType,
 }
 
 impl LocalStorage {
@@ -32,12 +34,14 @@ impl LocalStorage {
     authority: Authority,
     local_path: String,
     path_prefix: String,
+    object_type: ObjectType,
   ) -> Self {
     Self {
       scheme,
       authority,
       local_path,
       path_prefix,
+      object_type,
     }
   }
 
@@ -60,6 +64,11 @@ impl LocalStorage {
   pub fn path_prefix(&self) -> &str {
     &self.path_prefix
   }
+
+  /// Get the object type.
+  pub fn object_type(&self) -> &ObjectType {
+    &self.object_type
+  }
 }
 
 impl Default for LocalStorage {
@@ -69,6 +78,7 @@ impl Default for LocalStorage {
       authority: default_authority(),
       local_path: default_local_path(),
       path_prefix: Default::default(),
+      object_type: Default::default(),
     }
   }
 }
@@ -80,6 +90,7 @@ impl From<&DataServerConfig> for Option<LocalStorage> {
       Authority::from_str(&config.addr().to_string()).ok()?,
       config.local_path().to_str()?.to_string(),
       config.serve_at().to_string(),
+      Default::default(),
     ))
   }
 }
@@ -134,6 +145,7 @@ mod tests {
       Authority::from_static("127.0.0.1:8080"),
       "data".to_string(),
       "/data".to_string(),
+      Default::default(),
     );
 
     assert_eq!(result.unwrap(), expected);

htsget-config/src/storage/mod.rs

@@ -9,6 +9,7 @@ use crate::storage::url::UrlStorageClient;
 use crate::types::{Query, Response, Result};
 
 pub mod local;
+pub mod object;
 #[cfg(feature = "s3-storage")]
 pub mod s3;
 #[cfg(feature = "url-storage")]

htsget-config/src/storage/object/c4gh.rs

@@ -0,0 +1,62 @@
+//! Crypt4GH key parsing.
+//!
+
+use crate::error::Error::ParseError;
+use crate::error::{Error, Result};
+use crypt4gh::error::Crypt4GHError;
+use crypt4gh::keys::{get_private_key, get_public_key};
+use crypt4gh::Keys;
+use serde::Deserialize;
+use std::path::PathBuf;
+
+/// Config for Crypt4GH keys.
+#[derive(Deserialize, Debug, Clone, PartialEq, Eq)]
+#[serde(try_from = "C4GHPath")]
+pub struct C4GHKeys {
+  keys: Vec<Keys>,
+}
+
+impl C4GHKeys {
+  /// Get the inner value.
+  pub fn into_inner(self) -> Vec<Keys> {
+    self.keys
+  }
+}
+
+#[derive(Deserialize, Debug, Clone, PartialEq, Eq)]
+pub struct C4GHPath {
+  private_key: PathBuf,
+  recipient_public_key: PathBuf,
+}
+
+impl C4GHPath {
+  pub fn new(private_key: PathBuf, recipient_public_key: PathBuf) -> Self {
+    Self {
+      private_key,
+      recipient_public_key,
+    }
+  }
+}
+
+impl TryFrom<C4GHPath> for C4GHKeys {
+  type Error = Error;
+
+  fn try_from(path: C4GHPath) -> Result<Self> {
+    let private_key = get_private_key(path.private_key, Ok("".to_string()))?;
+    let recipient_public_key = get_public_key(path.recipient_public_key)?;
+
+    Ok(C4GHKeys {
+      keys: vec![Keys {
+        method: 0,
+        privkey: private_key,
+        recipient_pubkey: recipient_public_key,
+      }],
+    })
+  }
+}
+
+impl From<Crypt4GHError> for Error {
+  fn from(err: Crypt4GHError) -> Self {
+    ParseError(err.to_string())
+  }
+}

htsget-config/src/storage/object/mod.rs

@@ -0,0 +1,23 @@
+//! Defines the type of object used by storage.
+//!
+
+#[cfg(feature = "c4gh-experimental")]
+pub mod c4gh;
+
+#[cfg(feature = "c4gh-experimental")]
+use crate::storage::object::c4gh::C4GHKeys;
+use serde::{Deserialize, Serialize};
+
+/// An object type, can be regular or Crypt4GH encrypted.
+#[derive(Serialize, Deserialize, Debug, Clone, Default, PartialEq, Eq)]
+#[serde(untagged, deny_unknown_fields)]
+#[non_exhaustive]
+pub enum ObjectType {
+  #[default]
+  Regular,
+  #[cfg(feature = "c4gh-experimental")]
+  C4GH {
+    #[serde(flatten, skip_serializing)]
+    keys: C4GHKeys,
+  },
+}