Add basic X509 Distribution Point extension support

Adds support to read the full name of a distribution point extension.

Signed-off-by: Steffen Eiden <[email protected]>

openssl-sys/src/handwritten/x509.rs

@@ -9,6 +9,8 @@ pub struct X509_VAL {
 
 pub enum X509_NAME_ENTRY {}
 
+stack!(stack_st_X509_NAME_ENTRY);
+
 stack!(stack_st_X509_NAME);
 
 pub enum X509_EXTENSION {}

openssl-sys/src/handwritten/x509v3.rs

@@ -103,3 +103,30 @@ extern "C" {
     #[cfg(ossl110)]
     pub fn X509_get_extended_key_usage(x: *mut X509) -> u32;
 }
+
+#[repr(C)]
+pub struct DIST_POINT_NAME {
+    pub type_: c_int,
+    pub name: DIST_POINT_NAME_st_anon_union,
+    pub dpname: *mut X509_NAME,
+}
+
+#[repr(C)]
+pub union DIST_POINT_NAME_st_anon_union {
+    pub fullname: *mut stack_st_GENERAL_NAME,
+    pub relativename: *mut stack_st_X509_NAME_ENTRY,
+}
+
+#[repr(C)]
+pub struct DIST_POINT {
+    pub distpoint: *mut DIST_POINT_NAME,
+    pub reasons: *mut ASN1_BIT_STRING,
+    pub CRLissuer: *mut stack_st_GENERAL_NAME,
+    pub dp_reasons: c_int,
+}
+stack!(stack_st_DIST_POINT);
+
+extern "C" {
+    pub fn DIST_POINT_free(dist_point: *mut DIST_POINT);
+    pub fn DIST_POINT_NAME_free(dist_point: *mut DIST_POINT_NAME);
+}

openssl/src/x509/mod.rs

@@ -423,6 +423,20 @@ impl X509Ref {
         }
     }
 
+    /// Returns this certificate's CRL distribution points, if they exist.
+    #[corresponds(X509_get_ext_d2i)]
+    pub fn crl_distribution_points(&self) -> Option<Stack<DistPoint>> {
+        unsafe {
+            let stack = ffi::X509_get_ext_d2i(
+                self.as_ptr(),
+                ffi::NID_crl_distribution_points,
+                ptr::null_mut(),
+                ptr::null_mut(),
+            );
+            Stack::from_ptr_opt(stack as *mut _)
+        }
+    }
+
     /// Returns this certificate's issuer alternative name entries, if they exist.
     #[corresponds(X509_get_ext_d2i)]
     pub fn issuer_alt_names(&self) -> Option<Stack<GeneralName>> {
@@ -1927,6 +1941,49 @@ impl Stackable for GeneralName {
     type StackType = ffi::stack_st_GENERAL_NAME;
 }
 
+foreign_type_and_impl_send_sync! {
+    type CType = ffi::DIST_POINT;
+    fn drop = ffi::DIST_POINT_free;
+
+    /// A `X509` distribution point.
+    pub struct DistPoint;
+    /// Reference to `DistPoint`.
+    pub struct DistPointRef;
+}
+
+impl DistPointRef {
+    /// Returns the name of this distribution point if it exists
+    pub fn distpoint(&self) -> Option<&DistPointNameRef> {
+        unsafe { DistPointNameRef::from_const_ptr_opt((*self.as_ptr()).distpoint) }
+    }
+}
+
+foreign_type_and_impl_send_sync! {
+    type CType = ffi::DIST_POINT_NAME;
+    fn drop = ffi::DIST_POINT_NAME_free;
+
+    /// A `X509` distribution point.
+    pub struct DistPointName;
+    /// Reference to `DistPointName`.
+    pub struct DistPointNameRef;
+}
+
+impl DistPointNameRef {
+    /// Returns the contents of this DistPointName if it is a fullname.
+    pub fn fullname(&self) -> Option<&StackRef<GeneralName>> {
+        unsafe {
+            if (*self.as_ptr()).type_ != 0 {
+                return None;
+            }
+            StackRef::from_const_ptr_opt((*self.as_ptr()).name.fullname)
+        }
+    }
+}
+
+impl Stackable for DistPoint {
+    type StackType = ffi::stack_st_DIST_POINT;
+}
+
 foreign_type_and_impl_send_sync! {
     type CType = ffi::ACCESS_DESCRIPTION;
     fn drop = ffi::ACCESS_DESCRIPTION_free;

openssl/src/x509/tests.rs

@@ -986,3 +986,30 @@ fn ipv6_as_subject_alternative_name_is_formatted_in_debug() {
         8u8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 128,
     ]);
 }
+
+#[test]
+fn test_dist_point() {
+    let cert = include_bytes!("../../test/certv3.pem");
+    let cert = X509::from_pem(cert).unwrap();
+
+    let dps = cert.crl_distribution_points().unwrap();
+    let dp = dps.get(0).unwrap();
+    let dp_nm = dp.distpoint().unwrap();
+    let dp_gns = dp_nm.fullname().unwrap();
+    let dp_gn = dp_gns.get(0).unwrap();
+    assert_eq!(dp_gn.uri().unwrap(), "http://example.com/crl.pem");
+
+    let dp = dps.get(1).unwrap();
+    let dp_nm = dp.distpoint().unwrap();
+    let dp_gns = dp_nm.fullname().unwrap();
+    let dp_gn = dp_gns.get(0).unwrap();
+    assert_eq!(dp_gn.uri().unwrap(), "http://example.com/crl2.pem");
+    assert!(dps.get(2).is_none())
+}
+
+#[test]
+fn test_dist_point_null() {
+    let cert = include_bytes!("../../test/cert.pem");
+    let cert = X509::from_pem(cert).unwrap();
+    assert!(cert.crl_distribution_points().is_none());
+}

openssl/test/certv3.pem

@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

openssl/test/certv3_extfile

@@ -0,0 +1 @@
+crlDistributionPoints=URI:http://example.com/crl.pem,URI:http://example.com/crl2.pem

systest/build.rs

@@ -110,7 +110,9 @@ fn main() {
             || s.starts_with("CRYPTO_EX_")
     });
     cfg.skip_struct(|s| {
-        s == "ProbeResult" || s == "X509_OBJECT_data" // inline union
+        s == "ProbeResult" ||
+            s == "X509_OBJECT_data" || // inline union
+            s == "DIST_POINT_NAME_st_anon_union" // inline union
     });
     cfg.skip_fn(move |s| {
         s == "CRYPTO_memcmp" ||                 // uses volatile
@@ -130,6 +132,7 @@ fn main() {
     cfg.skip_field_type(|s, field| {
         (s == "EVP_PKEY" && field == "pkey") ||      // union
             (s == "GENERAL_NAME" && field == "d") || // union
+            (s == "DIST_POINT_NAME" && field == "name") || // union
             (s == "X509_OBJECT" && field == "data") // union
     });
     cfg.skip_signededness(|s| {