diff --git a/ext-hyper/src/hyper_http.rs b/ext-hyper/src/hyper_http.rs
index eca4278..e2b7034 100644
--- a/ext-hyper/src/hyper_http.rs
+++ b/ext-hyper/src/hyper_http.rs
@@ -7,7 +7,7 @@ use httpsig::prelude::{
     build_http_message_component, DerivedComponentName, HttpMessageComponent, HttpMessageComponentId, HttpMessageComponentName,
     HttpMessageComponentParam,
   },
-  signature_params::HttpSignatureParams,
+  HttpSignatureBase, HttpSignatureParams,
 };
 //
 
@@ -53,6 +53,22 @@ where
   }
 }
 /* --------------------------------------- */
+/// Build signature base from hyper http request and signature params
+fn build_signature_base_from_request<B>(
+  req: &Request<B>,
+  signature_params: &HttpSignatureParams,
+) -> anyhow::Result<HttpSignatureBase> {
+  let component_lines = signature_params
+    .covered_components
+    .iter()
+    .map(|component_id| extract_http_message_component_from_request(req, component_id))
+    .collect::<Vec<_>>();
+  ensure!(component_lines.iter().all(|c| c.is_ok()), "Failed to extract component lines");
+  let component_lines = component_lines.into_iter().map(|c| c.unwrap()).collect::<Vec<_>>();
+
+  HttpSignatureBase::try_new(&component_lines, signature_params)
+}
+
 /// Extract http field from hyper http request
 fn extract_http_field_from_request<B>(
   req: &Request<B>,
@@ -204,4 +220,23 @@ mod tests {
     assert_eq!(component.value.as_component_value(), r##"("@method" "@authority")"##);
     assert_eq!(component.value.key(), Some("sig1"));
   }
+
+  #[tokio::test]
+  async fn test_build_signature_base_from_request() {
+    let req = build_request().await.unwrap();
+
+    const SIGPARA: &str = r##";created=1704972031;alg="ed25519";keyid="gjrE7ACMxgzYfFHgabgf4kLTg1eKIdsJ94AiFTFj1is""##;
+    let values = (r##""@method" "content-type" "date" "content-digest""##, SIGPARA);
+    let signature_params = HttpSignatureParams::try_from(format!("({}){}", values.0, values.1).as_str()).unwrap();
+
+    let signature_base = build_signature_base_from_request(&req, &signature_params).unwrap();
+    assert_eq!(
+      signature_base.to_string(),
+      r##""@method": GET
+"content-type": application/json, application/json-patch+json
+"date": Sun, 09 May 2021 18:30:00 GMT
+"content-digest": sha-256=:X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=:
+"@signature-params": ("@method" "content-type" "date" "content-digest");created=1704972031;alg="ed25519";keyid="gjrE7ACMxgzYfFHgabgf4kLTg1eKIdsJ94AiFTFj1is""##
+    );
+  }
 }
diff --git a/lib/src/lib.rs b/lib/src/lib.rs
index 208a903..34ed5e7 100644
--- a/lib/src/lib.rs
+++ b/lib/src/lib.rs
@@ -18,9 +18,8 @@ pub mod prelude {
       HttpMessageComponentParam,
     };
   }
-  pub mod signature_params {
-    pub use crate::signature_params::HttpSignatureParams;
-  }
+
+  pub use crate::{signature_base::HttpSignatureBase, signature_params::HttpSignatureParams};
 }
 
 #[cfg(test)]
diff --git a/lib/src/signature_base.rs b/lib/src/signature_base.rs
index 9ffcb78..96397f5 100644
--- a/lib/src/signature_base.rs
+++ b/lib/src/signature_base.rs
@@ -2,23 +2,19 @@ use crate::{message_component::HttpMessageComponent, signature_params::HttpSigna
 
 /// Signature Base
 /// https://www.ietf.org/archive/id/draft-ietf-httpbis-message-signatures-19.html#section-2.5
-pub struct SignatureBase {
+pub struct HttpSignatureBase {
   /// HTTP message field and derived components ordered as in the vector in signature params
   component_lines: Vec<HttpMessageComponent>,
   /// signature params
   signature_params: HttpSignatureParams,
 }
 
-impl SignatureBase {
+impl HttpSignatureBase {
   /// Creates a new signature base from component lines and signature params
   /// This should not be exposed to user and not used directly.
   /// TODO: Use wrapper functions generating SignatureBase from base HTTP request and Signer itself instead when newly generating signature
   /// TODO: When verifying signature, use wrapper functions generating SignatureBase from HTTP request containing signature params itself instead.
-  pub fn try_new(
-    component_lines: &Vec<HttpMessageComponent>,
-    signature_params: &HttpSignatureParams,
-    signature_key: Option<&str>,
-  ) -> anyhow::Result<Self> {
+  pub fn try_new(component_lines: &Vec<HttpMessageComponent>, signature_params: &HttpSignatureParams) -> anyhow::Result<Self> {
     // check if the order of component lines is the same as the order of covered message component ids
     if component_lines.len() != signature_params.covered_components.len() {
       anyhow::bail!("The number of component lines is not the same as the number of covered message component ids");
@@ -45,14 +41,14 @@ impl SignatureBase {
   }
 }
 
-impl std::fmt::Display for SignatureBase {
+impl std::fmt::Display for HttpSignatureBase {
   fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
     let mut signature_base = String::new();
     for component_line in &self.component_lines {
       signature_base.push_str(&component_line.to_string());
       signature_base.push('\n');
     }
-    signature_base.push_str(&format!("\"@signature-params\": {}", self.signature_params.to_string()));
+    signature_base.push_str(&format!("\"@signature-params\": {}", self.signature_params));
     write!(f, "{}", signature_base)
   }
 }
@@ -77,7 +73,7 @@ mod test {
       HttpMessageComponent::from_serialized_str("\"content-digest\": sha-256=:X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=:")
         .unwrap(),
     ];
-    let signature_base = SignatureBase::try_new(&component_lines, &signature_params, None).unwrap();
+    let signature_base = HttpSignatureBase::try_new(&component_lines, &signature_params).unwrap();
     let test_string = r##""@method": GET
 "@path": /
 "date": Tue, 07 Jun 2014 20:51:35 GMT
diff --git a/lib/src/signature_params.rs b/lib/src/signature_params.rs
index e925ba9..6192699 100644
--- a/lib/src/signature_params.rs
+++ b/lib/src/signature_params.rs
@@ -17,19 +17,19 @@ const DEFAULT_EXPIRES_IN: u64 = 300;
 /// https://www.ietf.org/archive/id/draft-ietf-httpbis-message-signatures-19.html#name-signature-parameters
 pub struct HttpSignatureParams {
   /// created unix timestamp.
-  pub(crate) created: Option<u64>,
+  pub created: Option<u64>,
   /// signature expires unix timestamp.
-  pub(crate) expires: Option<u64>,
+  pub expires: Option<u64>,
   /// nonce
-  pub(crate) nonce: Option<String>,
+  pub nonce: Option<String>,
   /// algorithm name
-  pub(crate) alg: Option<String>,
+  pub alg: Option<String>,
   /// key id.
-  pub(crate) keyid: Option<String>,
+  pub keyid: Option<String>,
   /// tag
-  pub(crate) tag: Option<String>,
+  pub tag: Option<String>,
   /// covered component vector string: ordered message components, i.e., string of http_fields and derived_components
-  pub(crate) covered_components: Vec<HttpMessageComponentId>,
+  pub covered_components: Vec<HttpMessageComponentId>,
 }
 
 impl std::fmt::Display for HttpSignatureParams {