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..c0a23591
--- /dev/null
+++ b/openssl/src/asn1.rs
@@ -0,0 +1,73 @@
+use ffi;
+use libc::c_long;
+use std::fmt;
+use std::ptr;
+use std::slice;
+use std::str;
+
+use {cvt, cvt_p};
+use bio::MemBio;
+use crypto::CryptoString;
+use error::ErrorStack;
+use types::{OpenSslType, OpenSslTypeRef};
+
+type_!(Asn1Time, Asn1TimeRef, ffi::ASN1_TIME, ffi::ASN1_TIME_free);
+
+impl fmt::Display for Asn1TimeRef {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        unsafe {
+            let mem_bio = try!(MemBio::new());
+            try!(cvt(ffi::ASN1_TIME_print(mem_bio.as_ptr(), self.as_ptr())));
+            write!(f, "{}", str::from_utf8_unchecked(mem_bio.get_buf()))
+        }
+    }
+}
+
+impl Asn1Time {
+    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)
+    }
+}
+
+type_!(Asn1String, Asn1StringRef, ffi::ASN1_STRING, ffi::ASN1_STRING_free);
+
+impl Asn1StringRef {
+    pub fn as_utf8(&self) -> Result<CryptoString, ErrorStack> {
+        unsafe {
+            let mut ptr = ptr::null_mut();
+            let len = ffi::ASN1_STRING_to_UTF8(&mut ptr, self.as_ptr());
+            if len < 0 {
+                return Err(ErrorStack::get());
+            }
+
+            Ok(CryptoString::from_raw_parts(ptr, len as usize))
+        }
+    }
+
+    pub fn as_slice(&self) -> &[u8] {
+        unsafe { slice::from_raw_parts(ASN1_STRING_data(self.as_ptr()), self.len()) }
+    }
+
+    pub fn len(&self) -> usize {
+        unsafe { ffi::ASN1_STRING_length(self.as_ptr()) as usize }
+    }
+}
+
+#[cfg(any(ossl101, ossl102))]
+use ffi::ASN1_STRING_data;
+
+#[cfg(ossl110)]
+#[allow(bad_style)]
+unsafe fn ASN1_STRING_data(s: *mut ffi::ASN1_STRING) -> *mut ::libc::c_uchar {
+    ffi::ASN1_STRING_get0_data(s) as *mut _
+}