*** M2Crypto/SMIME.py	Sat Mar 31 04:09:38 2001
--- M2Crypto/SMIME.py	Wed Jun 12 11:49:04 2002
***************
*** 54,59 ****
--- 54,64 ----
      def write_der(self, bio):
          return m2.pkcs7_write_bio_der(self.pkcs7, bio._ptr())
  
+     def get_cert_chain(self):
+         """If the pkcs7 blob is decrypted, return the included
+            certificate chain"""
+         cert_chain = m2.pkcs7_get_cert_chain(self.pkcs7)
+         return [X509.X509(cert) for cert in cert_chain]
  
  def load_pkcs7(p7file):
      bio = m2.bio_new_file(p7file, 'r')


*** swig/_pkcs7.i	Sat Jul 21 03:06:24 2001
--- swig/_pkcs7.i	Wed Jun 12 11:47:57 2002
***************
*** 143,148 ****
--- 143,178 ----
      return tuple;
  }
  
+ /* Given a decrypted PKCS7 structure containing a signature, will
+    return a list representing the included certificate chain */
+ PyObject *pkcs7_get_cert_chain(PKCS7 *p7) {
+    STACK_OF(X509) *certs = NULL;
+    X509 *x;
+    PyObject *list, *_x;
+    int num_certs, i;
+ 
+    certs = p7->d.sign->cert;
+    
+    if (certs != NULL) 
+    {
+       num_certs = sk_X509_num(certs);
+       if (!(list = PyList_New(num_certs))) {
+          PyErr_SetString(PyExc_RuntimeError, "pkcs7_get_cert_chain: PyList_new");
+          return NULL;
+       }
+       for (i = 0; i < num_certs; i++) {
+          x = sk_X509_value(certs, i);
+          _x = SWIG_NewPointerObj((void *)x, SWIGTYPE_p_X509);
+          PyList_SET_ITEM(list, i, _x);
+       }
+       return list;
+    } else {
+       Py_INCREF(Py_None);
+       return Py_None;
+    }
+ 
+ }
+ 
  PKCS7 *pkcs7_read_bio(BIO *bio) {
      return PEM_read_bio_PKCS7(bio, NULL, NULL, NULL);
  }