algorithm-registry: initial commit

Cargo.toml

@@ -1,6 +1,7 @@
 [workspace]
 resolver = "2"
 members = [
+    "algorithm-registry",
     "blobby",
     "block-buffer",
     "block-padding",
@@ -15,7 +16,7 @@ members = [
     "opaque-debug",
     "wycheproof2blb",
     "zeroize",
-    "zeroize/derive"
+    "zeroize/derive",
 ]
 
 [profile.dev]

algorithm-registry/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "algorithm-registry"
+version = "0.1.0"
+description = """
+Utility to lookup algorithms from their OID
+"""
+authors = ["RustCrypto Developers"]
+license = "MIT OR Apache-2.0"
+readme = "README.md"
+edition = "2018"
+documentation = "https://docs.rs/algorithm-db"
+repository = "https://github.com/RustCrypto/hashes"
+categories = ["cryptography"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+const-oid = { version = "0.9" }
+digest = "0.10.7"
+
+sha1 = { version = "0.10.6", features = ["oid"], optional = true }
+sha2 = { version = "0.10.8", features = ["oid"], optional = true }
+sha3 = { version = "0.10.8", features = ["oid"], optional = true }
+
+[features]
+default = ["sha1", "sha2", "sha3"]
+sha1 = ["dep:sha1"]
+sha2 = ["dep:sha2"]
+sha3 = ["dep:sha3"]

algorithm-registry/README.md

@@ -0,0 +1,9 @@
+# [RustCrypto]: Algorithm Registry
+
+Registry allows a user to dynamically lookup an implementation of algorithm by OID.
+This is used for validation of certificates and other structures.
+
+
+[//]: # (links)
+
+[RustCrypto]: https://github.com/rustcrypto

algorithm-registry/src/digest.rs

@@ -0,0 +1,36 @@
+use const_oid::{AssociatedOid, ObjectIdentifier};
+use digest::{Digest, DynDigest};
+
+/// [`get_digest`] would lookup the
+pub fn get_digest(identifier: ObjectIdentifier) -> Option<Box<dyn DynDigest>> {
+    macro_rules! check_match {
+        ($h:ty) => {
+            if (identifier == <$h as AssociatedOid>::OID) {
+                return Some(Box::new(<$h>::new()));
+            }
+        };
+    }
+
+    #[cfg(feature = "sha1")]
+    {
+        check_match!(sha1::Sha1);
+    }
+
+    #[cfg(feature = "sha2")]
+    {
+        check_match!(sha2::Sha224);
+        check_match!(sha2::Sha256);
+        check_match!(sha2::Sha384);
+        check_match!(sha2::Sha512);
+    }
+
+    #[cfg(feature = "sha3")]
+    {
+        check_match!(sha3::Sha3_224);
+        check_match!(sha3::Sha3_256);
+        check_match!(sha3::Sha3_384);
+        check_match!(sha3::Sha3_512);
+    }
+
+    None
+}

algorithm-registry/src/lib.rs

@@ -0,0 +1,4 @@
+#![doc = include_str!("../README.md")]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+
+pub mod digest;