1 files changed, 73 insertions, 0 deletions
diff --git a/openssl/src/asn1.rs b/openssl/src/asn1.rs
new file mode 100644
index 00000000..91f920a3
--- /dev/null
+++ b/openssl/src/asn1.rs
@@ -0,0 +1,73 @@
+use libc::c_long;
+use std::{ptr, fmt};
+use std::marker::PhantomData;
+use std::ops::Deref;
+use ffi;
+
+use {cvt, cvt_p};
+use bio::MemBio;
+use error::ErrorStack;
+
+/// Corresponds to the ASN.1 structure Time defined in RFC5280
+pub struct Asn1Time(Asn1TimeRef<'static>);
+
+impl Asn1Time {
+    /// Wraps existing ASN1_TIME and takes ownership
+    pub unsafe fn from_ptr(handle: *mut ffi::ASN1_TIME) -> Asn1Time {
+        Asn1Time(Asn1TimeRef::from_ptr(handle))
+    }
+
+    fn from_period(period: c_long) -> Result<Asn1Time, ErrorStack> {
+        ffi::init();
+
+        unsafe {
+            let handle = try!(cvt_p(ffi::X509_gmtime_adj(ptr::null_mut(), period)));
+            Ok(Asn1Time::from_ptr(handle))
+        }
+    }
+
+    /// Creates a new time on specified interval in days from now
+    pub fn days_from_now(days: u32) -> Result<Asn1Time, ErrorStack> {
+        Asn1Time::from_period(days as c_long * 60 * 60 * 24)
+    }
+}
+
+impl Deref for Asn1Time {
+    type Target = Asn1TimeRef<'static>;
+
+    fn deref(&self) -> &Asn1TimeRef<'static> {
+        &self.0
+    }
+}
+
+/// A borrowed Asn1Time
+pub struct Asn1TimeRef<'a>(*mut ffi::ASN1_TIME, PhantomData<&'a ()>);
+
+impl<'a> Asn1TimeRef<'a> {
+    /// Creates a new `Asn1TimeRef` wrapping the provided handle.
+    pub unsafe fn from_ptr(handle: *mut ffi::ASN1_TIME) -> Asn1TimeRef<'a> {
+        Asn1TimeRef(handle, PhantomData)
+    }
+
+    /// Returns the raw handle
+    pub fn as_ptr(&self) -> *mut ffi::ASN1_TIME {
+        self.0
+    }
+}
+
+impl<'a> fmt::Display for Asn1TimeRef<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mem_bio = try!(MemBio::new());
+        let as_str = unsafe {
+            try!(cvt(ffi::ASN1_TIME_print(mem_bio.as_ptr(), self.0)));
+            String::from_utf8_unchecked(mem_bio.get_buf().to_owned())
+        };
+        write!(f, "{}", as_str)
+    }
+}
+
+impl Drop for Asn1Time {
+    fn drop(&mut self) {
+        unsafe { ffi::ASN1_TIME_free(self.as_ptr()) };
+    }
+}