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

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

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

@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (c) 2025 Matter Labs
+
+mod enclave_identity;
+mod fmspc;
+mod helpers;
+mod pck_cert;
+mod pck_crl;
+mod registration;
+mod tcb_info;
+
+use crate::{
+    error::IntelApiError,
+    types::ApiVersion, // Import ApiVersion
+};
+use reqwest::Client;
+use url::Url;
+
+// Base URL for the Intel Trusted Services API
+const BASE_URL: &str = "https://api.trustedservices.intel.com";
+
+/// Client for interacting with Intel Trusted Services API.
+///
+/// Provides methods to access both SGX and TDX certification services,
+/// supporting API versions V3 and V4. This client offers functionality
+/// to register platforms, retrieve PCK certificates and CRLs, fetch TCB
+/// information, enclave identities, as well as TCB evaluation data numbers.
+///
+/// # Examples
+///
+/// ```rust,no_run
+/// use intel_dcap_api::ApiClient;
+///
+/// #[tokio::main]
+/// async fn main() -> Result<(), Box<dyn std::error::Error>> {
+///     // Create a client with default settings (V4 API)
+///     let client = ApiClient::new()?;
+///
+///     // Retrieve TCB info for a specific FMSPC
+///     let tcb_info = client.get_sgx_tcb_info("00606A000000", None, None).await?;
+///     println!("TCB Info: {}", tcb_info.tcb_info_json);
+///
+///     Ok(())
+/// }
+/// ```
+#[derive(Clone)]
+pub struct ApiClient {
+    client: Client,
+    base_url: Url,
+    api_version: ApiVersion,
+}
+
+impl ApiClient {
+    /// Creates a new client targeting the latest supported API version (V4).
+    ///
+    /// # Returns
+    ///
+    /// A result containing the newly created `ApiClient` or an `IntelApiError` if there
+    /// was an issue building the underlying HTTP client.
+    ///
+    /// # Errors
+    ///
+    /// This function may fail if the provided TLS version or base URL
+    /// cannot be used to build a `reqwest` client.
+    pub fn new() -> Result<Self, IntelApiError> {
+        Self::new_with_options(BASE_URL, ApiVersion::V4) // Default to V4
+    }
+
+    /// Creates a new client targeting a specific API version.
+    ///
+    /// # Arguments
+    ///
+    /// * `api_version` - The desired API version to use (V3 or V4).
+    ///
+    /// # Errors
+    ///
+    /// Returns an `IntelApiError` if the `reqwest` client cannot be built
+    /// with the specified options.
+    pub fn new_with_version(api_version: ApiVersion) -> Result<Self, IntelApiError> {
+        Self::new_with_options(BASE_URL, api_version)
+    }
+
+    /// Creates a new client with a custom base URL, targeting the latest supported API version (V4).
+    ///
+    /// # Arguments
+    ///
+    /// * `base_url` - The custom base URL for the Intel Trusted Services API.
+    ///
+    /// # Errors
+    ///
+    /// Returns an `IntelApiError` if the `reqwest` client cannot be built
+    /// or if the provided base URL is invalid.
+    pub fn new_with_base_url(base_url: impl reqwest::IntoUrl) -> Result<Self, IntelApiError> {
+        Self::new_with_options(base_url, ApiVersion::V4) // Default to V4
+    }
+
+    /// Creates a new client with a custom base URL and specific API version.
+    ///
+    /// # Arguments
+    ///
+    /// * `base_url` - The custom base URL for the Intel Trusted Services API.
+    /// * `api_version` - The desired API version (V3 or V4).
+    ///
+    /// # Errors
+    ///
+    /// Returns an `IntelApiError` if the `reqwest` client cannot be built
+    /// or if the provided base URL is invalid.
+    pub fn new_with_options(
+        base_url: impl reqwest::IntoUrl,
+        api_version: ApiVersion,
+    ) -> Result<Self, IntelApiError> {
+        Ok(ApiClient {
+            client: Client::builder()
+                .min_tls_version(reqwest::tls::Version::TLS_1_2)
+                .build()?,
+            base_url: base_url.into_url()?,
+            api_version, // Store the version
+        })
+    }
+}