1 files changed, 41 insertions, 0 deletions
diff --git a/vendor/der/src/writer/pem.rs b/vendor/der/src/writer/pem.rs
new file mode 100644
index 0000000..87a6f8f
--- /dev/null
+++ b/vendor/der/src/writer/pem.rs
@@ -0,0 +1,41 @@
+//! Streaming PEM writer.
+
+use super::Writer;
+use crate::Result;
+use pem_rfc7468::{Encoder, LineEnding};
+
+/// `Writer` type which outputs PEM-encoded data.
+pub struct PemWriter<'w>(Encoder<'static, 'w>);
+
+impl<'w> PemWriter<'w> {
+    /// Create a new PEM writer which outputs into the provided buffer.
+    ///
+    /// Uses the default 64-character line wrapping.
+    pub fn new(
+        type_label: &'static str,
+        line_ending: LineEnding,
+        out: &'w mut [u8],
+    ) -> Result<Self> {
+        Ok(Self(Encoder::new(type_label, line_ending, out)?))
+    }
+
+    /// Get the PEM label which will be used in the encapsulation boundaries
+    /// for this document.
+    pub fn type_label(&self) -> &'static str {
+        self.0.type_label()
+    }
+
+    /// Finish encoding PEM, writing the post-encapsulation boundary.
+    ///
+    /// On success, returns the total number of bytes written to the output buffer.
+    pub fn finish(self) -> Result<usize> {
+        Ok(self.0.finish()?)
+    }
+}
+
+impl Writer for PemWriter<'_> {
+    fn write(&mut self, slice: &[u8]) -> Result<()> {
+        self.0.encode(slice)?;
+        Ok(())
+    }
+}