refactor(intel-dcap-api): split client.rs into smaller files

Signed-off-by: Harald Hoyer <harald@matterlabs.dev>

crates/intel-dcap-api/src/client/pck_crl.rs

@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (c) 2025 Matter Labs
+
+use super::ApiClient; // Import from parent module
+use crate::{
+    error::{check_status, IntelApiError},
+    responses::PckCrlResponse,
+    types::{CaType, CrlEncoding},
+};
+use reqwest::StatusCode;
+
+impl ApiClient {
+    /// GET /sgx/certification/{v3,v4}/pckcrl
+    /// Retrieves the PCK Certificate Revocation List (CRL) for a specified CA type.
+    ///
+    /// Optionally takes an `encoding` parameter indicating whether the CRL should be
+    /// returned as PEM or DER. Defaults to PEM if not specified.
+    ///
+    /// # Arguments
+    ///
+    /// * `ca_type` - The type of CA to retrieve the CRL for (e.g., "processor" or "platform").
+    /// * `encoding` - An optional [`CrlEncoding`] (PEM or DER).
+    ///
+    /// # Returns
+    ///
+    /// A [`PckCrlResponse`] containing the CRL data and the issuer chain.
+    ///
+    /// # Errors
+    ///
+    /// Returns an `IntelApiError` if the request fails or if the response status
+    /// is not `200 OK`.
+    /// Optional 'encoding' parameter ("pem" or "der").
+    /// Returns CRL data (PEM or DER) and Issuer Chain header.
+    pub async fn get_pck_crl(
+        &self,
+        ca_type: CaType,
+        encoding: Option<CrlEncoding>,
+    ) -> Result<PckCrlResponse, IntelApiError> {
+        let path = self.build_api_path("sgx", "", "pckcrl")?;
+        let mut url = self.base_url.join(&path)?;
+        url.query_pairs_mut()
+            .append_pair("ca", &ca_type.to_string());
+
+        if let Some(enc) = encoding {
+            url.query_pairs_mut()
+                .append_pair("encoding", &enc.to_string());
+        }
+
+        let request_builder = self.client.get(url);
+        let response = request_builder.send().await?;
+        let response = check_status(response, &[StatusCode::OK]).await?;
+
+        let issuer_chain = self.get_required_header(
+            &response,
+            "SGX-PCK-CRL-Issuer-Chain",       // v4 name
+            Some("SGX-PCK-CRL-Issuer-Chain"), // v3 name
+        )?;
+
+        // Response body is PEM or DER CRL
+        let crl_data = response.bytes().await?.to_vec();
+
+        Ok(PckCrlResponse {
+            crl_data,
+            issuer_chain,
+        })
+    }
+}