diff --git a/src/services/authorization.rs b/src/services/authorization.rs
index 9419b216..4f85800c 100644
--- a/src/services/authorization.rs
+++ b/src/services/authorization.rs
@@ -47,6 +47,7 @@ pub enum ACTION {
     GetPublicSettings,
     GetTorrent,
     AddTorrent,
+    GetCanonicalInfoHash,
 }
 
 pub struct Service {
@@ -188,18 +189,21 @@ impl CasbinConfiguration {
                 admin, GetImageByUrl
                 admin, GetTorrent
                 admin, AddTorrent
+                admin, GetCanonicalInfoHash
                 registered, GetCategories
                 registered, GetImageByUrl
                 registered, GetPublicSettings
                 registered, GetTags
                 registered, GetTorrent
                 registered, AddTorrent
+                registered, GetCanonicalInfoHash
                 guest, GetCategories
                 guest, GetTags
                 guest, GetAboutPage
                 guest, GetLicensePage
                 guest, GetPublicSettings
                 guest, GetTorrent
+                guest, GetCanonicalInfoHash
                 ",
             ),
         }
diff --git a/src/services/torrent.rs b/src/services/torrent.rs
index 5d5464b9..23695684 100644
--- a/src/services/torrent.rs
+++ b/src/services/torrent.rs
@@ -547,6 +547,26 @@ impl Index {
 
         Ok(torrent_response)
     }
+
+    /// It returns the canonical info-hash.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the user is not is there was a problem with the database.
+    pub async fn get_canonical_info_hash(
+        &self,
+        info_hash: &InfoHash,
+        opt_user_id: Option<UserId>,
+    ) -> Result<Option<InfoHash>, ServiceError> {
+        self.authorization_service
+            .authorize(ACTION::GetCanonicalInfoHash, opt_user_id)
+            .await?;
+
+        self.torrent_info_hash_repository
+            .find_canonical_info_hash_for(info_hash)
+            .await
+            .map_err(|_| ServiceError::DatabaseError)
+    }
 }
 
 pub struct DbTorrentRepository {