feat: Added age-ffi.

zig-vendor/age-ffi/src/validation.rs

@@ -0,0 +1,81 @@
+//! Recipient and identity validation functions.
+
+use crate::helpers::cstr_to_str;
+use std::os::raw::c_char;
+use std::str::FromStr;
+
+/// Check if a string is a valid x25519 recipient (public key).
+///
+/// # Arguments
+/// * `recipient` - The recipient string to validate
+///
+/// # Returns
+/// true if valid, false otherwise
+#[no_mangle]
+pub extern "C" fn age_is_valid_x25519_recipient(recipient: *const c_char) -> bool {
+    let recipient_str = match unsafe { cstr_to_str(recipient) } {
+        Ok(s) => s,
+        Err(_) => return false,
+    };
+
+    recipient_str.parse::<age::x25519::Recipient>().is_ok()
+}
+
+/// Check if a string is a valid x25519 identity (private key).
+///
+/// # Arguments
+/// * `identity` - The identity string to validate
+///
+/// # Returns
+/// true if valid, false otherwise
+#[no_mangle]
+pub extern "C" fn age_is_valid_x25519_identity(identity: *const c_char) -> bool {
+    let identity_str = match unsafe { cstr_to_str(identity) } {
+        Ok(s) => s,
+        Err(_) => return false,
+    };
+
+    age::x25519::Identity::from_str(identity_str).is_ok()
+}
+
+/// Check if a string is a valid SSH recipient (public key).
+///
+/// # Arguments
+/// * `recipient` - The recipient string to validate
+///
+/// # Returns
+/// true if valid, false otherwise
+#[no_mangle]
+pub extern "C" fn age_is_valid_ssh_recipient(recipient: *const c_char) -> bool {
+    let recipient_str = match unsafe { cstr_to_str(recipient) } {
+        Ok(s) => s,
+        Err(_) => return false,
+    };
+
+    recipient_str.parse::<age::ssh::Recipient>().is_ok()
+}
+
+/// Get the type of a recipient string.
+///
+/// # Arguments
+/// * `recipient` - The recipient string
+///
+/// # Returns
+/// 0 = invalid, 1 = x25519, 2 = ssh (ed25519 or rsa)
+#[no_mangle]
+pub extern "C" fn age_recipient_type(recipient: *const c_char) -> u8 {
+    let recipient_str = match unsafe { cstr_to_str(recipient) } {
+        Ok(s) => s.trim(),
+        Err(_) => return 0,
+    };
+
+    if recipient_str.parse::<age::x25519::Recipient>().is_ok() {
+        return 1;
+    }
+
+    if recipient_str.parse::<age::ssh::Recipient>().is_ok() {
+        return 2;
+    }
+
+    0
+}