feat: update hasher registry to work with Maven central and add MD5 hash

Cargo.toml

@@ -32,6 +32,7 @@ home = "0.5.9"
 http = "1.1.0"
 human_bytes = { version = "0.4.3", default-features = false }
 lazy_static = "1.5.0"
+md-5 = "0.10.6"
 num-format = "0.4.4"
 quick-xml = "0.35.0"
 rand = "0.8.5"

README.md

@@ -25,7 +25,8 @@ In either case, PostgreSQL will run in a separate process space.
 - running PostgreSQL on ephemeral ports
 - async and blocking API
 - bundling the PostgreSQL archive in an executable
-- dynamic version resolution
+- semantic version resolution
+- support for custom PostgreSQL archives / binaries
 - ability to configure PostgreSQL startup options
 - URL based configuration
 - choice of native-tls vs rustls

postgresql_archive/Cargo.toml

@@ -18,6 +18,7 @@ hex = { workspace = true }
 http = { workspace = true }
 human_bytes = { workspace = true, default-features = false }
 lazy_static = { workspace = true }
+md-5 = { workspace = true }
 num-format = { workspace = true }
 quick-xml = { workspace = true, features = ["serialize"] }
 regex = { workspace = true }

postgresql_archive/src/hasher/md5.rs

@@ -0,0 +1,26 @@
+use crate::Result;
+use md5::{Digest, Md5};
+
+/// Hashes the data using MD5.
+///
+/// # Errors
+/// * If the data cannot be hashed.
+pub fn hash(data: &Vec<u8>) -> Result<String> {
+    let mut hasher = Md5::new();
+    hasher.update(data);
+    let hash = hex::encode(hasher.finalize());
+    Ok(hash)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_hash() -> Result<()> {
+        let data = vec![4, 2];
+        let hash = hash(&data)?;
+        assert_eq!("21fb3d1d1a91a7e80dff456205f3380b", hash);
+        Ok(())
+    }
+}

postgresql_archive/src/hasher/mod.rs

@@ -1,5 +1,6 @@
 pub mod blake2b_512;
 pub mod blake2s_256;
+pub mod md5;
 pub mod registry;
 pub mod sha1;
 pub mod sha2_256;

postgresql_archive/src/hasher/registry.rs

@@ -1,5 +1,6 @@
 use crate::configuration::theseus;
-use crate::hasher::{sha1, sha2_256, sha2_512};
+use crate::hasher::{md5, sha1, sha2_256, sha2_512};
+use crate::repository::maven;
 use crate::Error::{PoisonedLock, UnsupportedHasher};
 use crate::Result;
 use lazy_static::lazy_static;
@@ -70,21 +71,21 @@ impl Default for HasherRegistry {
             |url, extension| Ok(url.starts_with(theseus::URL) && extension == "sha256"),
             sha2_256::hash,
         );
-        // The zonky maven central releases prior to version 13.2.0 only provide MD5/SHA-1 hashes.
+        // Register the Maven hashers: https://maven.apache.org/resolver/about-checksums.html#implemented-checksum-algorithms
         registry.register(
-            |url, extension| {
-                Ok(url.contains("zonky")
-                    && url.contains("embedded-postgres-binaries")
-                    && extension == "sha1")
-            },
+            |url, extension| Ok(url.starts_with(maven::URL) && extension == "md5"),
+            md5::hash,
+        );
+        registry.register(
+            |url, extension| Ok(url.starts_with(maven::URL) && extension == "sha1"),
             sha1::hash,
         );
         registry.register(
-            |url, extension| {
-                Ok(url.contains("zonky")
-                    && url.contains("embedded-postgres-binaries")
-                    && extension == "sha512")
-            },
+            |url, extension| Ok(url.starts_with(maven::URL) && extension == "sha256"),
+            sha2_256::hash,
+        );
+        registry.register(
+            |url, extension| Ok(url.starts_with(maven::URL) && extension == "sha512"),
             sha2_512::hash,
         );
         registry
@@ -119,7 +120,6 @@ pub fn get<S: AsRef<str>>(url: S, extension: S) -> Result<HasherFn> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::configuration::zonky;
 
     fn test_hasher(extension: &str, expected: &str) -> Result<()> {
         let hasher = get("https://foo.com", extension)?;
@@ -163,6 +163,6 @@ mod tests {
 
     #[test]
     fn test_get_zonkyio_postgresql_binaries() {
-        assert!(get(zonky::URL, "sha512").is_ok());
+        assert!(get(maven::URL, "sha512").is_ok());
     }
 }

postgresql_archive/src/repository/maven/mod.rs

@@ -1,2 +1,4 @@
 pub(crate) mod models;
 pub mod repository;
+
+pub const URL: &str = "https://repo1.maven.org/maven2";