Merge pull request #1127 from snapview/cms-pem

Add `to_pem()` and `from_pem()` for `CmsContentInfo`

openssl-sys/src/pem.rs

@@ -146,6 +146,16 @@ extern "C" {
     ) -> *mut PKCS7;
 
     pub fn PEM_write_bio_PKCS7(bp: *mut BIO, x: *mut PKCS7) -> c_int;
+
+    #[cfg(ossl101)]
+    pub fn PEM_read_bio_CMS(
+        bio: *mut BIO,
+        out: *mut *mut CMS_ContentInfo,
+        callback: pem_password_cb,
+        user_data: *mut c_void,
+    ) -> *mut CMS_ContentInfo;
+    #[cfg(ossl101)]
+    pub fn PEM_write_bio_CMS(bio: *mut BIO, cms: *const CMS_ContentInfo) -> c_int;
 }
 
 pub const PEM_R_NO_START_LINE: c_int = 108;

openssl/src/cms.rs

@@ -105,6 +105,16 @@ impl CmsContentInfoRef {
         to_der,
         ffi::i2d_CMS_ContentInfo
     }
+
+    to_pem! {
+        /// Serializes this CmsContentInfo using DER.
+        ///
+        /// OpenSSL documentation at [`PEM_write_bio_CMS`]
+        ///
+        /// [`PEM_write_bio_CMS`]: https://www.openssl.org/docs/man1.1.0/man3/PEM_write_bio_CMS.html
+        to_pem,
+        ffi::PEM_write_bio_CMS
+    }
 }
 
 impl CmsContentInfo {
@@ -134,6 +144,17 @@ impl CmsContentInfo {
         ffi::d2i_CMS_ContentInfo
     }
 
+    from_pem! {
+        /// Deserializes a PEM-encoded ContentInfo structure.
+        ///
+        /// This corresponds to [`PEM_read_bio_CMS`].
+        ///
+        /// [`PEM_read_bio_CMS`]: https://www.openssl.org/docs/man1.1.0/man3/PEM_read_bio_CMS.html
+        from_pem,
+        CmsContentInfo,
+        ffi::PEM_read_bio_CMS
+    }
+
     /// Given a signing cert `signcert`, private key `pkey`, a certificate stack `certs`,
     /// data `data` and flags `flags`, create a CmsContentInfo struct.
     ///
@@ -227,13 +248,23 @@ mod test {
 
         let encrypt = CmsContentInfo::encrypt(&cert_stack, &input.as_bytes(), Cipher::des_ede3_cbc(), CMSOptions::empty())
             .expect("failed create encrypted cms");
-        let encrypt = encrypt.to_der().expect("failed to create der from cms");
 
-        // decrypt cms message using private key cert
-        let decrypt = CmsContentInfo::from_der(&encrypt).expect("failed read cms from der");
+        // decrypt cms message using private key cert (DER)
+        {
+            let encrypted_der = encrypt.to_der().expect("failed to create der from cms");
+            let decrypt = CmsContentInfo::from_der(&encrypted_der).expect("failed read cms from der");
             let decrypt = decrypt.decrypt(&priv_cert.pkey, &priv_cert.cert).expect("failed to decrypt cms");
             let decrypt = String::from_utf8(decrypt).expect("failed to create string from cms content");
-
             assert_eq!(input, decrypt);
         }
+
+        // decrypt cms message using private key cert (PEM)
+        {
+            let encrypted_pem = encrypt.to_pem().expect("failed to create pem from cms");
+            let decrypt = CmsContentInfo::from_pem(&encrypted_pem).expect("failed read cms from pem");
+            let decrypt = decrypt.decrypt(&priv_cert.pkey, &priv_cert.cert).expect("failed to decrypt cms");
+            let decrypt = String::from_utf8(decrypt).expect("failed to create string from cms content");
+            assert_eq!(input, decrypt);
+        }
+    }
 }