added cms decryption

1 files changed, 60 insertions, 0 deletions

diff --git a/openssl/src/cms.rs b/openssl/src/cms.rs
new file mode 100644
index 00000000..9619d0b8
--- /dev/null
+++ b/openssl/src/cms.rs
@@ -0,0 +1,60 @@
+//! CMS archive
+
+use ffi;
+use foreign_types::{ForeignType, ForeignTypeRef};
+use std::ptr;
+use error::ErrorStack;
+
+use bio::{MemBio, MemBioSlice};
+
+use x509::X509;
+use pkey::PKeyRef;
+
+use cvt;
+use cvt_p;
+
+foreign_type! {
+    type CType = ffi::CMS_ContentInfo;
+    fn drop = ffi::CMS_ContentInfo_free;
+
+    pub struct CmsContentInfo;
+    pub struct CmsContentInfoRef;
+}
+
+impl CmsContentInfoRef {
+    pub fn decrypt(&self, pkey: &PKeyRef, cert: &X509) -> Result<Vec<u8>, ErrorStack> {
+        unsafe {
+            let pkey = pkey.as_ptr();
+            let cert = cert.as_ptr();
+            let out = try!(MemBio::new());
+            let flags: u32 = 0;
+
+            try!(cvt(ffi::CMS_decrypt(
+                self.as_ptr(),
+                pkey,
+                cert,
+                ptr::null_mut(),
+                out.as_ptr(),
+                flags.into(),
+            )));
+
+            Ok(out.get_buf().to_owned())
+        }
+    }
+
+}
+
+impl CmsContentInfo {
+    pub fn smime_read_cms(smime: &[u8]) -> Result<CmsContentInfo, ErrorStack> {
+        unsafe {
+            let bio = try!(MemBioSlice::new(smime));
+
+            let cms = try!(cvt_p(ffi::SMIME_read_CMS(
+                bio.as_ptr(),
+                ptr::null_mut(),
+            )));
+
+            Ok(CmsContentInfo::from_ptr(cms))
+        }
+    }
+}